Merge remote-tracking branch 'origin/master' into add-with-shims

.changeset/README.md

@@ -0,0 +1,8 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

.changeset/chilly-apes-travel.md

@@ -0,0 +1,5 @@
+---
+"fnm": minor
+---
+
+Add `--json` to `fnm env` to output the env vars as JSON

.changeset/config.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@2.0.0/schema.json",
+  "changelog": [
+    "@svitejs/changesets-changelog-github-compact",
+    { "repo": "Schniz/fnm" }
+  ],
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "restricted",
+  "baseBranch": "master",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.changeset/red-flowers-collect.md

@@ -0,0 +1,5 @@
+---
+"fnm": patch
+---
+
+This updates the Changesets configurations.

.changeset/soft-laws-doubt.md

@@ -0,0 +1,5 @@
+---
+"fnm": patch
+---
+
+fix test: Use correct PATH for npm install test

.ci/generate-changelog.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-
-if [ "$1" = "" ]; then
-  echo "No version provided, using 'Unreleased'" >&2
-  NEXT_VERSION="Unreleased"
-else
-  NEXT_VERSION="$1"
-fi
-
-echo "Generating changelog for $NEXT_VERSION"
-
-lerna-changelog --from=v1.0.0 "--next-version=$NEXT_VERSION" >CHANGELOG.md
-prettier --write CHANGELOG.md

.ci/prepare-version.js

@@ -2,85 +2,71 @@
 
 /// @ts-check
 
-const fs = require("fs");
+import fs from "fs"
-const cp = require("child_process");
+import cp from "child_process"
-const path = require("path");
+import cmd from "cmd-ts"
-const cmd = require("cmd-ts");
+import toml from "toml"
-const toml = require("toml");
+import assert from "assert"
 
-const CARGO_TOML_PATH = path.join(__dirname, "../Cargo.toml");
+const CARGO_TOML_PATH = new URL("../Cargo.toml", import.meta.url).pathname
 
 const command = cmd.command({
   name: "prepare-version",
   description: "Prepare a new fnm version",
-  args: {
+  args: {},
-    versionType: cmd.positional({
+  async handler({}) {
-      displayName: "version type",
+    updateCargoToml(await getPackageVersion())
-      type: cmd.oneOf(["patch", "minor", "major"]),
+    exec("cargo build --release")
-    }),
+    exec("yarn generate-command-docs --binary-path=./target/release/fnm")
+    exec("./.ci/record_screen.sh")
   },
-  async handler({ versionType }) {
+})
-    exec("git pull --ff-only");
-    const nextVersion = updateCargoToml(versionType);
-    exec("cargo build --release");
-    exec("yarn generate-command-docs --binary-path=./target/release/fnm");
-    exec("./docs/record_screen.sh");
-    exec(`yarn changelog ${nextVersion}`);
-  },
-});
 
-cmd.run(cmd.binary(command), process.argv);
+cmd.run(cmd.binary(command), process.argv)
 
 //////////////////////
 // Helper functions //
 //////////////////////
 
-function updateCargoToml(versionType) {
+/**
-  const cargoToml = fs.readFileSync(CARGO_TOML_PATH, "utf8");
+ * @returns {Promise<string>}
-  const cargoTomlContents = toml.parse(cargoToml);
+ */
-  const currentVersion = cargoTomlContents.package.version;
+async function getPackageVersion() {
-  const nextVersion = changeVersion(
+  const pkgJson = await fs.promises.readFile(
-    versionType,
+    new URL("../package.json", import.meta.url),
-    cargoTomlContents.package.version
+    "utf8"
-  );
+  )
+  const version = JSON.parse(pkgJson).version
+  assert(version, "package.json version is not set")
+  return version
+}
+
+function updateCargoToml(nextVersion) {
+  const cargoToml = fs.readFileSync(CARGO_TOML_PATH, "utf8")
+  const cargoTomlContents = toml.parse(cargoToml)
+  const currentVersion = cargoTomlContents.package.version
 
   const newToml = cargoToml.replace(
     `version = "${currentVersion}"`,
     `version = "${nextVersion}"`
-  );
+  )
 
   if (newToml === cargoToml) {
-    console.error("Cargo.toml didn't change, error!");
+    console.error("Cargo.toml didn't change, error!")
-    process.exitCode = 1;
+    process.exitCode = 1
-    return;
+    return
   }
 
-  fs.writeFileSync(CARGO_TOML_PATH, newToml, "utf8");
+  fs.writeFileSync(CARGO_TOML_PATH, newToml, "utf8")
 
-  return nextVersion;
+  return nextVersion
 }
 
 function exec(command, env) {
-  console.log(`$ ${command}`);
+  console.log(`$ ${command}`)
   return cp.execSync(command, {
-    cwd: path.join(__dirname, ".."), // root of repo
+    cwd: new URL("..", import.meta.url),
     stdio: "inherit",
     env: { ...process.env, ...env },
-  });
+  })
-}
-
-/**
- * @param {"patch" | "minor" | "major"} type
- * @param {string} version
- */
-function changeVersion(type, version) {
-  const [major, minor, patch] = version.split(".").map((x) => parseInt(x, 10));
-  switch (type) {
-    case "patch":
-      return [major, minor, patch + 1].join(".");
-    case "minor":
-      return [major, minor + 1, 0].join(".");
-    case "major":
-      return [major + 1, 0, 0].join(".");
-  }
 }

.ci/print-command-docs.js

@@ -2,24 +2,23 @@
 
 /// @ts-check
 
-const execa = require("execa");
+import { execa } from "execa"
-const path = require("path");
+import fs from "node:fs"
-const fs = require("fs");
+import cmd from "cmd-ts"
-const cmd = require("cmd-ts");
+import cmdFs from "cmd-ts/dist/cjs/batteries/fs.js"
-const cmdFs = require("cmd-ts/dist/cjs/batteries/fs");
 
 const FnmBinaryPath = {
   ...cmdFs.ExistingPath,
   defaultValue() {
-    const target = path.join(__dirname, "../target/debug/fnm");
+    const target = new URL("../target/debug/fnm", import.meta.url)
     if (!fs.existsSync(target)) {
       throw new Error(
         "Can't find debug target, please run `cargo build` or provide a specific binary path"
-      );
+      )
     }
-    return target;
+    return target.pathname
   },
-};
+}
 
 const command = cmd.command({
   name: "print-command-docs",
@@ -36,27 +35,27 @@ const command = cmd.command({
     }),
   },
   async handler({ checkForDirty, fnmPath }) {
-    const targetFile = path.join(__dirname, "../docs/commands.md");
+    const targetFile = new URL("../docs/commands.md", import.meta.url).pathname
-    await main(targetFile, fnmPath);
+    await main(targetFile, fnmPath)
     if (checkForDirty) {
-      const gitStatus = await checkGitStatus(targetFile);
+      const gitStatus = await checkGitStatus(targetFile)
       if (gitStatus.state === "dirty") {
-        process.exitCode = 1;
+        process.exitCode = 1
         console.error(
           "The file has changed. Please re-run `yarn generate-command-docs`."
-        );
+        )
-        console.error(`hint: The following diff was found:`);
+        console.error(`hint: The following diff was found:`)
-        console.error();
+        console.error()
-        console.error(gitStatus.diff);
+        console.error(gitStatus.diff)
       }
     }
   },
-});
+})
 
 cmd.run(cmd.binary(command), process.argv).catch((err) => {
-  console.error(err);
+  console.error(err)
-  process.exitCode = process.exitCode || 1;
+  process.exitCode = process.exitCode || 1
-});
+})
 
 /**
  * @param {string} targetFile
@@ -64,20 +63,20 @@ cmd.run(cmd.binary(command), process.argv).catch((err) => {
  * @returns {Promise<void>}
  */
 async function main(targetFile, fnmPath) {
-  const stream = fs.createWriteStream(targetFile);
+  const stream = fs.createWriteStream(targetFile)
 
-  const { subcommands, text: mainText } = await getCommandHelp(fnmPath);
+  const { subcommands, text: mainText } = await getCommandHelp(fnmPath)
 
-  await write(stream, line(`fnm`, mainText));
+  await write(stream, line(`fnm`, mainText))
 
   for (const subcommand of subcommands) {
-    const { text: subcommandText } = await getCommandHelp(fnmPath, subcommand);
+    const { text: subcommandText } = await getCommandHelp(fnmPath, subcommand)
-    await write(stream, "\n" + line(`fnm ${subcommand}`, subcommandText));
+    await write(stream, "\n" + line(`fnm ${subcommand}`, subcommandText))
   }
 
-  stream.close();
+  stream.close()
 
-  await execa(`yarn`, ["prettier", "--write", targetFile]);
+  await execa(`yarn`, ["prettier", "--write", targetFile])
 }
 
 /**
@@ -87,14 +86,14 @@ async function main(targetFile, fnmPath) {
  */
 function write(stream, content) {
   return new Promise((resolve, reject) => {
-    stream.write(content, (err) => (err ? reject(err) : resolve()));
+    stream.write(content, (err) => (err ? reject(err) : resolve()))
-  });
+  })
 }
 
 function line(cmd, text) {
-  const cmdCode = "`" + cmd + "`";
+  const cmdCode = "`" + cmd + "`"
-  const textCode = "```\n" + text + "\n```";
+  const textCode = "```\n" + text + "\n```"
-  return `# ${cmdCode}\n${textCode}`;
+  return `# ${cmdCode}\n${textCode}`
 }
 
 /**
@@ -103,23 +102,25 @@ function line(cmd, text) {
  * @returns {Promise<{ subcommands: string[], text: string }>}
  */
 async function getCommandHelp(fnmPath, command) {
-  const cmdArg = command ? [command] : [];
+  const cmdArg = command ? [command] : []
-  const result = await run(fnmPath, [...cmdArg, "--help"]);
+  const result = await run(fnmPath, [...cmdArg, "--help"])
-  const text = result.stdout;
+  const text = result.stdout
-  const rows = text.split("\n");
+  const rows = text.split("\n")
-  const headerIndex = rows.findIndex((x) => x.includes("SUBCOMMANDS"));
+  const headerIndex = rows.findIndex((x) => x.includes("SUBCOMMANDS"))
   /** @type {string[]} */
-  const subcommands = [];
+  const subcommands = []
   if (!command) {
     for (const row of rows.slice(headerIndex + 1)) {
-      const words = row.split(/\s+/);
+      const [, word] = row.split(/\s+/)
-      subcommands.push(words[1]);
+      if (word && word[0].toLowerCase() === word[0]) {
+        subcommands.push(word)
+      }
     }
   }
   return {
     subcommands,
     text,
-  };
+  }
 }
 
 /**
@@ -131,7 +132,7 @@ function run(fnmPath, args) {
     reject: false,
     stdout: "pipe",
     stderr: "pipe",
-  });
+  })
 }
 
 /**
@@ -145,9 +146,9 @@ async function checkGitStatus(targetFile) {
     {
       reject: false,
     }
-  );
+  )
   if (exitCode === 0) {
-    return { state: "clean" };
+    return { state: "clean" }
   }
-  return { state: "dirty", diff: stdout };
+  return { state: "dirty", diff: stdout }
 }

.ci/record_screen.sh

@@ -3,10 +3,15 @@
 DIRECTORY="$(dirname "$0")"
 
 function setup_binary() {
-  TEMP_DIR="$(mktemp -d -t fnm)"
+  TEMP_DIR="/tmp/fnm-$(date '+%s')"
+  mkdir "$TEMP_DIR"
   cp ./target/release/fnm "$TEMP_DIR/fnm"
   export PATH=$TEMP_DIR:$PATH
   export FNM_DIR=$TEMP_DIR/.fnm
+
+  # First run of the binary might be slower due to anti-virus software
+  echo "Using $(which fnm)"
+  echo "  with version $(fnm --version)"
 }
 
 setup_binary
@@ -16,4 +21,9 @@ RECORDING_PATH=$DIRECTORY/screen_recording
 (rm -rf "$RECORDING_PATH" &> /dev/null || true)
 
 asciinema rec -c "$DIRECTORY/recorded_screen_script.sh" "$RECORDING_PATH"
-sed "s@$TEMP_DIR@~@g" "$RECORDING_PATH" | svg-term --window --out "$DIRECTORY/fnm.svg" --height=17 --width=70
+sed "s@$TEMP_DIR@~@g" "$RECORDING_PATH" | \
+  svg-term \
+    --window \
+    --out "docs/fnm.svg" \
+    --height=17 \
+    --width=70

.ci/recorded_screen_script.sh

@@ -1,16 +1,19 @@
-#!/bin/zsh
+#!/bin/bash
 
 set -e
 
-GAL_PROMPT_PREFIX='\e[34m✡ \e[0m'
+export PATH=$PATH_ADDITION:$PATH
+
+GAL_PROMPT_PREFIX="\e[34m✡\e[m  "
 
 function type() {
   printf $GAL_PROMPT_PREFIX
-  echo $* | pv -qL $[10+(-2 + RANDOM%5)]
+  echo -n " "
+  echo $* | node .ci/type-letters.js
 }
 
 type 'eval "$(fnm env)"'
-eval `fnm env`
+eval "$(fnm env)"
 
 type 'fnm --version'
 fnm --version

.ci/type-letters.js

@@ -0,0 +1,13 @@
+(async () => {
+  for await (const chunk of process.stdin) {
+    const letters = chunk.toString("utf8").split("");
+    for (const letter of letters) {
+      process.stdout.write(letter);
+      await sleep(Math.random() * 100 + 20);
+    }
+  }
+})();
+
+function sleep(ms) {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}

.github/workflows/debug.yml

@@ -0,0 +1,62 @@
+name: "debug"
+
+on:
+  workflow_dispatch:
+
+concurrency:
+  group: debug
+  cancel-in-progress: true
+
+jobs:
+  e2e_windows_debug:
+    runs-on: windows-latest
+    name: "e2e/windows/debug"
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        ref: ${{ github.event.inputs.commit_hash }}
+    - name: Download artifact
+      id: download-artifact
+      uses: dawidd6/action-download-artifact@v2
+      with:
+        workflow: rust.yml
+        workflow_conclusion: ""
+        branch: ${{ env.GITHUB_REF }}
+        name: "fnm-windows"
+        path: "target/release"
+        if_no_artifact_found: ignore
+    - uses: hecrj/setup-rust-action@v1
+      if: steps.download-artifact.outputs.artifact-found == false
+      with:
+        rust-version: stable
+    - uses: Swatinem/rust-cache@v2
+      if: steps.download-artifact.outputs.artifact-found == false
+    - name: Build release binary
+      if: steps.download-artifact.outputs.artifact-found == false
+      run: cargo build --release
+      env:
+        RUSTFLAGS: "-C target-feature=+crt-static"
+    - uses: pnpm/action-setup@v2.2.4
+      with:
+        run_install: false
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 16.x
+        cache: 'pnpm'
+    - name: Get pnpm store directory
+      id: pnpm-cache
+      run: |
+        echo "::set-output name=pnpm_cache_dir::$(pnpm store path)"
+    - uses: actions/cache@v3
+      name: Setup pnpm cache
+      with:
+        path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pnpm-store-
+    - run: pnpm install
+    - name: 🐛 Debug Build
+      if: always()
+      uses: mxschmitt/action-tmate@v3
+      with:
+        limit-access-to-actor: true

.github/workflows/installation_script.yml

@@ -21,8 +21,8 @@ jobs:
     steps:
       - name: Set up QEMU
         id: qemu
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@v2
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Run installation script in Docker
         run: |
           docker run --rm -v $(pwd):$(pwd) -e "RUST_LOG=fnm=debug" --workdir $(pwd) ${{matrix.docker_image}} bash -c '
@@ -62,7 +62,7 @@ jobs:
             script_arguments: '--force-no-brew'
     runs-on: ${{ matrix.setup.os }}-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - run: "sudo apt-get install -y ${{ matrix.shell }}"
         name: Install ${{matrix.shell}} using apt-get
         if: matrix.setup.os == 'ubuntu'

.github/workflows/release.yml

@@ -0,0 +1,61 @@
+name: release
+on:
+  push:
+    branches:
+      - master
+      - main
+
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+
+jobs:
+
+  create_pull_request:
+    runs-on: ubuntu-latest
+    steps:
+    # set up
+    - uses: actions/checkout@v3
+
+    - uses: hecrj/setup-rust-action@v1
+      with:
+        rust-version: stable
+
+    - uses: Swatinem/rust-cache@v2
+
+    - uses: pnpm/action-setup@v2.2.4
+      with:
+        run_install: false
+
+    # pnpm
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 16.x
+        cache: 'pnpm'
+
+    - name: Get pnpm store directory
+      id: pnpm-cache
+      run: |
+        echo "::set-output name=pnpm_cache_dir::$(pnpm store path)"
+
+    - uses: actions/cache@v3
+      name: Setup pnpm cache
+      with:
+        path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pnpm-store-
+
+    - name: Install script dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y asciinema
+
+    - name: Install Node.js project dependencies
+      run: pnpm install
+
+    - name: Create Release Pull Request
+      uses: changesets/action@v1
+      with:
+        version: "pnpm version:prepare"
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        TERM: xterm

.github/workflows/rust.yml

@@ -6,6 +6,10 @@ on:
     branches:
       - master
 
+concurrency:
+  group: ci-${{ github.head_ref }}
+  cancel-in-progress: true
+
 jobs:
   fmt:
     runs-on: ubuntu-latest
@@ -13,7 +17,8 @@ jobs:
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable
-    - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v2
+    - uses: actions/checkout@v3
     - name: cargo fmt
       run: cargo fmt -- --check
 
@@ -23,7 +28,8 @@ jobs:
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable
-    - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v2
+    - uses: actions/checkout@v3
     - name: cargo clippy
       run: cargo clippy -- -D warnings
 
@@ -36,28 +42,10 @@ jobs:
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable
-    - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v2
-    - name: Run tests
+    - uses: actions/checkout@v3
-      run: cargo test -- --skip=feature_tests
-
-  e2e_tests:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macOS-latest, windows-latest]
-    steps:
-    - name: Install Fish and Zsh using brew
-      if: "startsWith(matrix.os, 'macOS')"
-      run: brew install fish zsh
-    - name: Install Fish and Zsh using apt
-      if: "startsWith(matrix.os, 'ubuntu')"
-      run: sudo apt-get install -y fish zsh
-    - uses: hecrj/setup-rust-action@v1
-      with:
-        rust-version: stable
-    - uses: actions/checkout@v2
     - name: Run tests
-      run: cargo test -- feature_tests
+      run: cargo test
 
   build_release:
     runs-on: windows-latest
@@ -66,12 +54,13 @@ jobs:
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable
-    - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v2
+    - uses: actions/checkout@v3
     - name: Build release binary
       run: cargo build --release
       env:
         RUSTFLAGS: "-C target-feature=+crt-static"
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: fnm-windows
         path: target/release/fnm.exe
@@ -83,7 +72,8 @@ jobs:
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable
-    - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v2
+    - uses: actions/checkout@v3
     - name: Build release binary
       run: cargo build --release
       env:
@@ -92,11 +82,155 @@ jobs:
       run: strip target/release/fnm
     - name: List dynamically linked libraries
       run: otool -L target/release/fnm
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: fnm-macos
         path: target/release/fnm
 
+  e2e_macos:
+    runs-on: macos-latest
+    needs: [build_macos_release]
+    name: "e2e/macos"
+    steps:
+    - name: install necessary shells
+      run: brew install fish zsh bash
+    - uses: actions/checkout@v3
+    - uses: actions/download-artifact@v3
+      with:
+        name: fnm-macos
+        path: target/release
+    - name: mark binary as executable
+      run: chmod +x target/release/fnm
+    - uses: pnpm/action-setup@v2.2.4
+      with:
+        run_install: false
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 16.x
+        cache: 'pnpm'
+    - name: Get pnpm store directory
+      id: pnpm-cache
+      run: |
+        echo "::set-output name=pnpm_cache_dir::$(pnpm store path)"
+    - uses: actions/cache@v3
+      name: Setup pnpm cache
+      with:
+        path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pnpm-store-
+    - run: pnpm install
+    - run: pnpm test
+      env:
+        FNM_TARGET_NAME: "release"
+        FORCE_COLOR: "1"
+
+  e2e_windows:
+    runs-on: windows-latest
+    needs: [build_release]
+    name: "e2e/windows"
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/download-artifact@v3
+      with:
+        name: fnm-windows
+        path: target/release
+    - uses: pnpm/action-setup@v2.2.4
+      with:
+        run_install: false
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 16.x
+        cache: 'pnpm'
+    - name: Get pnpm store directory
+      id: pnpm-cache
+      run: |
+        echo "::set-output name=pnpm_cache_dir::$(pnpm store path)"
+    - uses: actions/cache@v3
+      name: Setup pnpm cache
+      with:
+        path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pnpm-store-
+    - run: pnpm install
+    - run: pnpm test
+      env:
+        FNM_TARGET_NAME: "release"
+        FORCE_COLOR: "1"
+
+  # e2e_windows_debug:
+  #   runs-on: windows-latest
+  #   name: "e2e/windows/debug"
+  #   environment: Debug
+  #   needs: [e2e_windows]
+  #   if: contains(join(needs.*.result, ','), 'failure')
+  #   steps:
+  #   - uses: actions/checkout@v3
+  #   - uses: actions/download-artifact@v3
+  #     with:
+  #       name: fnm-windows
+  #       path: target/release
+  #   - uses: pnpm/action-setup@v2.2.2
+  #     with:
+  #       run_install: false
+  #   - uses: actions/setup-node@v3
+  #     with:
+  #       node-version: 16.x
+  #       cache: 'pnpm'
+  #   - name: Get pnpm store directory
+  #     id: pnpm-cache
+  #     run: |
+  #       echo "::set-output name=pnpm_cache_dir::$(pnpm store path)"
+  #   - uses: actions/cache@v3
+  #     name: Setup pnpm cache
+  #     with:
+  #       path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
+  #       key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+  #       restore-keys: |
+  #         ${{ runner.os }}-pnpm-store-
+  #   - run: pnpm install
+  #   - name: 🐛 Debug Build
+  #     uses: mxschmitt/action-tmate@v3
+
+  e2e_linux:
+    runs-on: ubuntu-latest
+    needs: [build_static_linux_binary]
+    name: "e2e/linux"
+    steps:
+    - name: install necessary shells
+      run: sudo apt-get update && sudo apt-get install -y fish zsh bash
+    - uses: actions/checkout@v3
+    - uses: actions/download-artifact@v3
+      with:
+        name: fnm-linux
+        path: target/release
+    - name: mark binary as executable
+      run: chmod +x target/release/fnm
+    - uses: pnpm/action-setup@v2.2.4
+      with:
+        run_install: false
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 16.x
+        cache: 'pnpm'
+    - name: Get pnpm store directory
+      id: pnpm-cache
+      run: |
+        echo "::set-output name=pnpm_cache_dir::$(pnpm store path)"
+    - uses: actions/cache@v3
+      name: Setup pnpm cache
+      with:
+        path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pnpm-store-
+    - run: pnpm install
+    - run: pnpm test
+      env:
+        FNM_TARGET_NAME: "release"
+        FORCE_COLOR: "1"
+
   build_static_linux_binary:
     name: "Build static Linux binary"
     runs-on: ubuntu-latest
@@ -105,16 +239,19 @@ jobs:
       with:
         rust-version: stable
         targets: x86_64-unknown-linux-musl
+    - uses: Swatinem/rust-cache@v2
+      with:
+        key: static-linux-binary
     - name: Install musl tools
       run: |
         sudo apt-get update
         sudo apt-get install -y --no-install-recommends musl-tools
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Build release binary
       run: cargo build --release --target x86_64-unknown-linux-musl
     - name: Strip binary from debug symbols
       run: strip target/x86_64-unknown-linux-musl/release/fnm
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: fnm-linux
         path: target/x86_64-unknown-linux-musl/release/fnm
@@ -138,20 +275,23 @@ jobs:
     steps:
     - name: Set up QEMU
       id: qemu
-      uses: docker/setup-qemu-action@v1
+      uses: docker/setup-qemu-action@v2
     - uses: hecrj/setup-rust-action@v1
       with:
         rust-version: stable
+    - uses: Swatinem/rust-cache@v2
+      with:
+        key: arm-binary-${{ matrix.arch }}
     - name: 'Download `cross` crate'
       run: cargo install cross
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: "Build release"
       run: cross build --target $RUST_TARGET --release
     - name: Compress binary using UPX
       run: |
         sudo apt-get install -y upx
         upx target/$RUST_TARGET/release/fnm
-    - uses: uraimo/run-on-arch-action@v2.1.1
+    - uses: uraimo/run-on-arch-action@v2.1.2
       name: Sanity test
       with:
         arch: ${{matrix.docker_platform}}
@@ -176,7 +316,7 @@ jobs:
           echo "fnm exec --using=12 -- node --version"
           /artifacts/fnm exec --using=12 -- node --version
 
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: fnm-${{ matrix.arch }}
         path: target/${{ env.RUST_TARGET }}/release/fnm
@@ -186,9 +326,9 @@ jobs:
     name: Ensure command docs are up-to-date
     needs: [build_static_linux_binary]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Download a single artifact
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v3
         with:
           name: fnm-linux
       - name: Make the binary runnable

.gitignore

@@ -1,5 +1,5 @@
 node_modules/
-docs/screen_recording
+.ci/screen_recording
 /benchmarks/results
 /target
 **/*.rs.bk

.kodiak.toml

@@ -0,0 +1 @@
+version = 1

.node-version

@@ -1 +1 @@
-16.13.1
+16.18.1

CHANGELOG.md

@@ -1,4 +1,102 @@
-## 1.28.2 (2021-12-05)
+## 1.31.0 (2022-02-16)
+
+## 1.31.1
+
+### Patch Changes
+
+- 6e6bdd8: Add changesets
+
+#### Bugfix 🐛
+
+- [#671](https://github.com/Schniz/fnm/pull/671) fix native-creds errors (using the unpublished version of reqwest) ([@Schniz](https://github.com/Schniz))
+- [#663](https://github.com/Schniz/fnm/pull/663) remove .unwrap() and .expect() in shell code ([@Schniz](https://github.com/Schniz))
+- [#656](https://github.com/Schniz/fnm/pull/656) Remove unwrap in fnm env, make error more readable ([@Schniz](https://github.com/Schniz))
+
+#### Committers: 1
+
+- Gal Schlezinger ([@Schniz](https://github.com/Schniz))
+
+## v1.30.1 (2022-01-30)
+
+#### Bugfix 🐛
+
+- [#652](https://github.com/Schniz/fnm/pull/652) Fix `fnm completions` ([@Schniz](https://github.com/Schniz))
+
+#### Committers: 1
+
+- Gal Schlezinger ([@Schniz](https://github.com/Schniz))
+
+## v1.30.0 (2022-01-30)
+
+#### Bugfix 🐛
+
+- [#625](https://github.com/Schniz/fnm/pull/625) Revert from using sysinfo, but only on Unix machines ([@Schniz](https://github.com/Schniz))
+- [#638](https://github.com/Schniz/fnm/pull/638) Use local cache directory instead of temp directory for symlinks ([@Schniz](https://github.com/Schniz))
+
+#### Internal 🛠
+
+- [#617](https://github.com/Schniz/fnm/pull/617) fix(deps): update rust crate clap to v3 ([@renovate[bot]](https://github.com/apps/renovate))
+- [#630](https://github.com/Schniz/fnm/pull/630) Replace `snafu` with `thiserror` ([@Schniz](https://github.com/Schniz))
+
+#### Documentation 📝
+
+- [#637](https://github.com/Schniz/fnm/pull/637) [Documentation] Adds Additional info regarding .node-version ([@uchihamalolan](https://github.com/uchihamalolan))
+
+#### Committers: 2
+
+- Gal Schlezinger ([@Schniz](https://github.com/Schniz))
+- Malolan B ([@uchihamalolan](https://github.com/uchihamalolan))
+
+## v1.29.2 (2022-01-06)
+
+#### Bugfix 🐛
+
+- [#626](https://github.com/Schniz/fnm/pull/626) Create the multishells directory if it is missing ([@Schniz](https://github.com/Schniz))
+
+#### Documentation 📝
+
+- [#598](https://github.com/Schniz/fnm/pull/598) Update README.md file emoji ([@lorensr](https://github.com/lorensr))
+- [#616](https://github.com/Schniz/fnm/pull/616) Use on cd by default ([@matthieubosquet](https://github.com/matthieubosquet))
+
+#### Committers: 3
+
+- Gal Schlezinger ([@Schniz](https://github.com/Schniz))
+- Loren ☺️ ([@lorensr](https://github.com/lorensr))
+- Matthieu Bosquet ([@matthieubosquet](https://github.com/matthieubosquet))
+
+## v1.29.1 (2021-12-28)
+
+#### Bugfix 🐛
+
+- [#613](https://github.com/Schniz/fnm/pull/613) Don't warn on `~/.fnm` yet ([@Schniz](https://github.com/Schniz))
+
+#### Committers: 1
+
+- Gal Schlezinger ([@Schniz](https://github.com/Schniz))
+
+## v1.29.0 (2021-12-28)
+
+#### New Feature 🎉
+
+- [#607](https://github.com/Schniz/fnm/pull/607) Allow recursive version lookups ([@Schniz](https://github.com/Schniz))
+- [#416](https://github.com/Schniz/fnm/pull/416) Respect \$XDG_DATA_HOME ([@samhh](https://github.com/samhh))
+
+#### Bugfix 🐛
+
+- [#603](https://github.com/Schniz/fnm/pull/603) (re)Include feature for (native) certificates ([@pfiaux](https://github.com/pfiaux))
+- [#605](https://github.com/Schniz/fnm/pull/605) Add a user-agent header ([@Schniz](https://github.com/Schniz))
+
+#### Internal 🛠
+
+- [#606](https://github.com/Schniz/fnm/pull/606) Migrate to Rust 2021 edition ([@Schniz](https://github.com/Schniz))
+
+#### Committers: 3
+
+- Gal Schlezinger ([@Schniz](https://github.com/Schniz))
+- Patrick Fiaux ([@pfiaux](https://github.com/pfiaux))
+- Sam A. Horvath-Hunt ([@samhh](https://github.com/samhh))
+
+## v1.28.2 (2021-12-05)
 
 #### Bugfix 🐛
 
@@ -197,7 +295,7 @@
 #### Bugfix 🐛
 
 - [#368](https://github.com/Schniz/fnm/pull/368) Update 'ring' to '0.16.17' ([@gucheen](https://github.com/gucheen))
-- [#347](https://github.com/Schniz/fnm/pull/347) Check if $ZDOTDIR exists to find correct path to .zshrc ([@thales-maciel](https://github.com/thales-maciel))
+- [#347](https://github.com/Schniz/fnm/pull/347) Check if \$ZDOTDIR exists to find correct path to .zshrc ([@thales-maciel](https://github.com/thales-maciel))
 
 #### Documentation 📝
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fnm"
-version = "1.28.2"
+version = "1.31.1"
 authors = ["Gal Schlezinger <gal@spitfire.co.il>"]
 edition = "2021"
 build = "build.rs"
@@ -9,38 +9,39 @@ repository = "https://github.com/Schniz/fnm"
 description = "Fast and simple Node.js version manager"
 
 [dependencies]
-serde = { version = "1.0.132", features = ["derive"] }
+serde = { version = "1.0.145", features = ["derive"] }
-clap = "2.34.0"
+clap = { version = "3.2.23", features = ["derive", "env"] }
-structopt = "0.3.25"
+serde_json = "1.0.85"
-serde_json = "1.0.73"
+chrono = { version = "0.4.23", features = ["serde"] }
-chrono = { version = "0.4.19", features = ["serde"] }
 tar = "0.4.38"
-xz2 = "0.1.6"
+xz2 = "0.1.7"
-semver = "1.0.4"
+semver = "1.0.14"
 dirs = "4.0.0"
 colored = "2.0.0"
-zip = "0.5.13"
+zip = "0.6.3"
-tempfile = "3.2.0"
+tempfile = "3.3.0"
-indoc = "1.0.3"
+indoc = "1.0.7"
-snafu = { version = "0.6.10", features = ["backtrace"] }
+log = "0.4.17"
-log = "0.4.14"
+env_logger = "0.9.3"
-env_logger = "0.9.0"
 atty = "0.2.14"
 encoding_rs_io = "0.1.7"
-reqwest = { version = "0.11.7", features = ["blocking", "json", "rustls-tls", "brotli"], default-features = false }
+reqwest = { version = "0.11.12", features = ["blocking", "json", "rustls-tls", "rustls-tls-native-roots", "brotli"], default-features = false }
-url = "2.2.2"
+url = "2.3.1"
-sysinfo = "0.22.3"
+sysinfo = "0.26.7"
+thiserror = "1.0.37"
+clap_complete = "3.2.5"
+anyhow = "1.0.65"
 
 [dev-dependencies]
-pretty_assertions = "1.0.0"
+pretty_assertions = "1.3.0"
 duct = "0.13.5"
 shell-escape = "0.1.5"
-insta = { version = "1.8.0", features = ["backtrace"] }
+insta = "1.21.0"
-serial_test = "0.5.1"
+serial_test = "0.9.0"
-test-log = "0.2.8"
+test-log = "0.2.11"
 
 [build-dependencies]
-embed-resource = "1.6.5"
+embed-resource = "1.7.3"
 
 [target.'cfg(windows)'.dependencies]
 csv = "1.1.6"

README.md

@@ -18,13 +18,15 @@
 
 :rocket: Built with speed in mind
 
-:thinking: Works with `.node-version` and `.nvmrc` files
+:open_file_folder: Works with `.node-version` and `.nvmrc` files
 
 ## Installation
 
 ### Using a script (macOS/Linux)
 
-For `bash`, `zsh` and `fish` shells, there's an [automatic installation script](./.ci/install.sh):
+For `bash`, `zsh` and `fish` shells, there's an [automatic installation script](./.ci/install.sh).
+
+First ensure that `curl` and `unzip` are already installed on you operating system. Then execute:
 
 ```sh
 curl -fsSL https://fnm.vercel.app/install | bash
@@ -118,31 +120,41 @@ Please follow your shell instructions to install them.
 
 ### Shell Setup
 
-fnm needs to run some shell commands before you can start using it.
+Environment variables need to be setup before you can start using fnm.
-This is done by evaluating the output of `fnm env`. Check out the following guides for the shell you use:
+This is done by evaluating the output of `fnm env`.
+To automatically run `fnm use` when a directory contains a `.node-version` or `.nvmrc` file, add the `--use-on-cd` option to your shell setup.
+
+Adding a `.node-version` to your project is as simple as:
+```bash
+$ node --version
+v14.18.3
+$ node --version > .node-version
+```
+
+Check out the following guides for the shell you use:
 
 #### Bash
 
-add the following to your `.bashrc` profile:
+Add the following to your `.bashrc` profile:
 
 ```bash
-eval "$(fnm env)"
+eval "$(fnm env --use-on-cd)"
 ```
 
 #### Zsh
 
-add the following to your `.zshrc` profile:
+Add the following to your `.zshrc` profile:
 
 ```zsh
-eval "$(fnm env)"
+eval "$(fnm env --use-on-cd)"
 ```
 
 #### Fish shell
 
-create `~/.config/fish/conf.d/fnm.fish` add this line to it:
+Create `~/.config/fish/conf.d/fnm.fish` add this line to it:
 
 ```fish
-fnm env | source
+fnm env --use-on-cd | source
 ```
 
 #### PowerShell
@@ -167,7 +179,7 @@ FOR /f "tokens=*" %i IN ('fnm env --use-on-cd') DO CALL %i
 
 #### Usage with Cmder
 
-Usage is very similar to the normal WinCMD install, apart for a few tweaks to allow being called from the cmder startup script. The example **assumes** that the `CMDER_ROOT` environment variable is **set** to the **root directory** of your Cmder installation.  
+Usage is very similar to the normal WinCMD install, apart for a few tweaks to allow being called from the cmder startup script. The example **assumes** that the `CMDER_ROOT` environment variable is **set** to the **root directory** of your Cmder installation.
 Then you can do something like this:
 
 - Make a .cmd file to invoke it

e2e/__snapshots__/aliases.test.ts.snap

@@ -0,0 +1,269 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash aliasing versions: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install 6.11.3
+fnm install 8.11.3
+fnm alias 8.11 oldie
+fnm alias 6 older
+fnm default older
+((fnm ls) | grep 8.11.3 || (echo "Expected output to contain 8.11.3" && exit 1)) | grep oldie || (echo "Expected output to contain oldie" && exit 1)
+((fnm ls) | grep 6.11.3 || (echo "Expected output to contain 6.11.3" && exit 1)) | grep older || (echo "Expected output to contain older" && exit 1)
+fnm use older
+if [ "$(node --version)" != "v6.11.3" ]; then
+  echo "Expected node version to be v6.11.3. Got $(node --version)"
+  exit 1
+fi
+fnm use oldie
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi
+fnm use default
+if [ "$(node --version)" != "v6.11.3" ]; then
+  echo "Expected node version to be v6.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Bash allows to install an lts if version missing: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm use --install-if-missing
+(fnm ls) | grep lts-latest || (echo "Expected output to contain lts-latest" && exit 1)"
+`;
+
+exports[`Bash can alias the system node: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm alias system my_system
+(fnm ls) | grep my_system || (echo "Expected output to contain my_system" && exit 1)
+fnm alias system default
+fnm alias my_system my_system2
+(fnm ls) | grep my_system2 || (echo "Expected output to contain my_system2" && exit 1)
+(fnm use my_system) | grep 'Bypassing fnm' || (echo "Expected output to contain 'Bypassing fnm'" && exit 1)
+fnm unalias my_system
+(fnm use my_system 2>&1) | grep 'Requested version my_system is not currently installed' || (echo "Expected output to contain 'Requested version my_system is not currently installed'" && exit 1)"
+`;
+
+exports[`Bash errors when alias is not found: Bash 1`] = `
+"set -e
+eval "$(fnm env --log-level=error)"
+(fnm use 2>&1) | grep 'Requested version lts-latest is not' || (echo "Expected output to contain 'Requested version lts-latest is not'" && exit 1)"
+`;
+
+exports[`Bash unalias a version: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install 11.10.0
+fnm install 8.11.3
+fnm alias 8.11.3 version8
+(fnm ls) | grep version8 || (echo "Expected output to contain version8" && exit 1)
+fnm unalias version8
+(fnm use version8 2>&1) | grep 'Requested version version8 is not currently installed' || (echo "Expected output to contain 'Requested version version8 is not currently installed'" && exit 1)"
+`;
+
+exports[`Bash unalias errors if alias not found: Bash 1`] = `
+"set -e
+eval "$(fnm env --log-level=error)"
+(fnm unalias lts 2>&1) | grep 'Requested alias lts not found' || (echo "Expected output to contain 'Requested alias lts not found'" && exit 1)"
+`;
+
+exports[`Fish aliasing versions: Fish 1`] = `
+"fnm env | source
+fnm install 6.11.3
+fnm install 8.11.3
+fnm alias 8.11 oldie
+fnm alias 6 older
+fnm default older
+begin; begin; fnm ls; end | grep 8.11.3; or echo "Expected output to contain 8.11.3" && exit 1; end | grep oldie; or echo "Expected output to contain oldie" && exit 1
+begin; begin; fnm ls; end | grep 6.11.3; or echo "Expected output to contain 6.11.3" && exit 1; end | grep older; or echo "Expected output to contain older" && exit 1
+fnm use older
+set ____test____ (node --version)
+if test "$____test____" != "v6.11.3"
+  echo "Expected node version to be v6.11.3. Got $____test____"
+  exit 1
+end
+fnm use oldie
+set ____test____ (node --version)
+if test "$____test____" != "v8.11.3"
+  echo "Expected node version to be v8.11.3. Got $____test____"
+  exit 1
+end
+fnm use default
+set ____test____ (node --version)
+if test "$____test____" != "v6.11.3"
+  echo "Expected node version to be v6.11.3. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish allows to install an lts if version missing: Fish 1`] = `
+"fnm env | source
+fnm use --install-if-missing
+begin; fnm ls; end | grep lts-latest; or echo "Expected output to contain lts-latest" && exit 1"
+`;
+
+exports[`Fish can alias the system node: Fish 1`] = `
+"fnm env | source
+fnm alias system my_system
+begin; fnm ls; end | grep my_system; or echo "Expected output to contain my_system" && exit 1
+fnm alias system default
+fnm alias my_system my_system2
+begin; fnm ls; end | grep my_system2; or echo "Expected output to contain my_system2" && exit 1
+begin; fnm use my_system; end | grep 'Bypassing fnm'; or echo "Expected output to contain 'Bypassing fnm'" && exit 1
+fnm unalias my_system
+begin; fnm use my_system 2>&1; end | grep 'Requested version my_system is not currently installed'; or echo "Expected output to contain 'Requested version my_system is not currently installed'" && exit 1"
+`;
+
+exports[`Fish errors when alias is not found: Fish 1`] = `
+"fnm env --log-level=error | source
+begin; fnm use 2>&1; end | grep 'Requested version lts-latest is not'; or echo "Expected output to contain 'Requested version lts-latest is not'" && exit 1"
+`;
+
+exports[`Fish unalias a version: Fish 1`] = `
+"fnm env | source
+fnm install 11.10.0
+fnm install 8.11.3
+fnm alias 8.11.3 version8
+begin; fnm ls; end | grep version8; or echo "Expected output to contain version8" && exit 1
+fnm unalias version8
+begin; fnm use version8 2>&1; end | grep 'Requested version version8 is not currently installed'; or echo "Expected output to contain 'Requested version version8 is not currently installed'" && exit 1"
+`;
+
+exports[`Fish unalias errors if alias not found: Fish 1`] = `
+"fnm env --log-level=error | source
+begin; fnm unalias lts 2>&1; end | grep 'Requested alias lts not found'; or echo "Expected output to contain 'Requested alias lts not found'" && exit 1"
+`;
+
+exports[`PowerShell aliasing versions: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install 6.11.3
+fnm install 8.11.3
+fnm alias 8.11 oldie
+fnm alias 6 older
+fnm default older
+$($__out__ = $($($__out__ = $(fnm ls | Select-String 8.11.3); if ($__out__ -eq $null) { exit 1 } else { $__out__ }) | Select-String oldie); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+$($__out__ = $($($__out__ = $(fnm ls | Select-String 6.11.3); if ($__out__ -eq $null) { exit 1 } else { $__out__ }) | Select-String older); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+fnm use older
+if ( "$(node --version)" -ne "v6.11.3" ) { echo "Expected node version to be v6.11.3. Got $(node --version)"; exit 1 }
+fnm use oldie
+if ( "$(node --version)" -ne "v8.11.3" ) { echo "Expected node version to be v8.11.3. Got $(node --version)"; exit 1 }
+fnm use default
+if ( "$(node --version)" -ne "v6.11.3" ) { echo "Expected node version to be v6.11.3. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`PowerShell allows to install an lts if version missing: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm use --install-if-missing
+$($__out__ = $(fnm ls | Select-String lts-latest); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`PowerShell can alias the system node: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm alias system my_system
+$($__out__ = $(fnm ls | Select-String my_system); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+fnm alias system default
+fnm alias my_system my_system2
+$($__out__ = $(fnm ls | Select-String my_system2); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+$($__out__ = $(fnm use my_system | Select-String 'Bypassing fnm'); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+fnm unalias my_system
+$($__out__ = $(fnm use my_system 2>&1 | Select-String 'Requested version my_system is not currently installed'); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`PowerShell errors when alias is not found: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --log-level=error | Out-String | Invoke-Expression
+$($__out__ = $(fnm use 2>&1 | Select-String 'Requested version lts-latest is not'); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`PowerShell unalias a version: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install 11.10.0
+fnm install 8.11.3
+fnm alias 8.11.3 version8
+$($__out__ = $(fnm ls | Select-String version8); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+fnm unalias version8
+$($__out__ = $(fnm use version8 2>&1 | Select-String 'Requested version version8 is not currently installed'); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`PowerShell unalias errors if alias not found: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --log-level=error | Out-String | Invoke-Expression
+$($__out__ = $(fnm unalias lts 2>&1 | Select-String 'Requested alias lts not found'); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`Zsh aliasing versions: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install 6.11.3
+fnm install 8.11.3
+fnm alias 8.11 oldie
+fnm alias 6 older
+fnm default older
+((fnm ls) | grep 8.11.3 || (echo "Expected output to contain 8.11.3" && exit 1)) | grep oldie || (echo "Expected output to contain oldie" && exit 1)
+((fnm ls) | grep 6.11.3 || (echo "Expected output to contain 6.11.3" && exit 1)) | grep older || (echo "Expected output to contain older" && exit 1)
+fnm use older
+if [ "$(node --version)" != "v6.11.3" ]; then
+  echo "Expected node version to be v6.11.3. Got $(node --version)"
+  exit 1
+fi
+fnm use oldie
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi
+fnm use default
+if [ "$(node --version)" != "v6.11.3" ]; then
+  echo "Expected node version to be v6.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh allows to install an lts if version missing: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm use --install-if-missing
+(fnm ls) | grep lts-latest || (echo "Expected output to contain lts-latest" && exit 1)"
+`;
+
+exports[`Zsh can alias the system node: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm alias system my_system
+(fnm ls) | grep my_system || (echo "Expected output to contain my_system" && exit 1)
+fnm alias system default
+fnm alias my_system my_system2
+(fnm ls) | grep my_system2 || (echo "Expected output to contain my_system2" && exit 1)
+(fnm use my_system) | grep 'Bypassing fnm' || (echo "Expected output to contain 'Bypassing fnm'" && exit 1)
+fnm unalias my_system
+(fnm use my_system 2>&1) | grep 'Requested version my_system is not currently installed' || (echo "Expected output to contain 'Requested version my_system is not currently installed'" && exit 1)"
+`;
+
+exports[`Zsh errors when alias is not found: Zsh 1`] = `
+"set -e
+eval "$(fnm env --log-level=error)"
+(fnm use 2>&1) | grep 'Requested version lts-latest is not' || (echo "Expected output to contain 'Requested version lts-latest is not'" && exit 1)"
+`;
+
+exports[`Zsh unalias a version: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install 11.10.0
+fnm install 8.11.3
+fnm alias 8.11.3 version8
+(fnm ls) | grep version8 || (echo "Expected output to contain version8" && exit 1)
+fnm unalias version8
+(fnm use version8 2>&1) | grep 'Requested version version8 is not currently installed' || (echo "Expected output to contain 'Requested version version8 is not currently installed'" && exit 1)"
+`;
+
+exports[`Zsh unalias errors if alias not found: Zsh 1`] = `
+"set -e
+eval "$(fnm env --log-level=error)"
+(fnm unalias lts 2>&1) | grep 'Requested alias lts not found' || (echo "Expected output to contain 'Requested alias lts not found'" && exit 1)"
+`;

e2e/__snapshots__/basic.test.ts.snap

@@ -0,0 +1,284 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash .node-version: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Bash .nvmrc: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Bash \`fnm ls\` with nothing installed: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+if [ "$(fnm ls)" != "* system" ]; then
+  echo "Expected fnm ls to be * system. Got $(fnm ls)"
+  exit 1
+fi"
+`;
+
+exports[`Bash basic usage: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install v8.11.3
+fnm use v8.11.3
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Bash resolves partial semver: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install 6
+fnm use 6
+if [ "$(node --version)" != "v6.17.1" ]; then
+  echo "Expected node version to be v6.17.1. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Bash use on cd: Bash 1`] = `
+"set -e
+eval "$(fnm env --use-on-cd)"
+fnm install v8.11.3
+fnm install v12.22.12
+cd subdir
+if [ "$(node --version)" != "v12.22.12" ]; then
+  echo "Expected node version to be v12.22.12. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Bash when .node-version and .nvmrc are in sync, it throws no error: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+if [ "$(node --version)" != "v11.10.0" ]; then
+  echo "Expected node version to be v11.10.0. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Fish .node-version: Fish 1`] = `
+"fnm env | source
+fnm install
+fnm use
+set ____test____ (node --version)
+if test "$____test____" != "v8.11.3"
+  echo "Expected node version to be v8.11.3. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish .nvmrc: Fish 1`] = `
+"fnm env | source
+fnm install
+fnm use
+set ____test____ (node --version)
+if test "$____test____" != "v8.11.3"
+  echo "Expected node version to be v8.11.3. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish \`fnm ls\` with nothing installed: Fish 1`] = `
+"fnm env | source
+set ____test____ (fnm ls)
+if test "$____test____" != "* system"
+  echo "Expected fnm ls to be * system. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish basic usage: Fish 1`] = `
+"fnm env | source
+fnm install v8.11.3
+fnm use v8.11.3
+set ____test____ (node --version)
+if test "$____test____" != "v8.11.3"
+  echo "Expected node version to be v8.11.3. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish resolves partial semver: Fish 1`] = `
+"fnm env | source
+fnm install 6
+fnm use 6
+set ____test____ (node --version)
+if test "$____test____" != "v6.17.1"
+  echo "Expected node version to be v6.17.1. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish use on cd: Fish 1`] = `
+"fnm env --use-on-cd | source
+fnm install v8.11.3
+fnm install v12.22.12
+cd subdir
+set ____test____ (node --version)
+if test "$____test____" != "v12.22.12"
+  echo "Expected node version to be v12.22.12. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish when .node-version and .nvmrc are in sync, it throws no error: Fish 1`] = `
+"fnm env | source
+fnm install
+fnm use
+set ____test____ (node --version)
+if test "$____test____" != "v11.10.0"
+  echo "Expected node version to be v11.10.0. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`PowerShell .node-version: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install
+fnm use
+if ( "$(node --version)" -ne "v8.11.3" ) { echo "Expected node version to be v8.11.3. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`PowerShell .nvmrc: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install
+fnm use
+if ( "$(node --version)" -ne "v8.11.3" ) { echo "Expected node version to be v8.11.3. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`PowerShell \`fnm ls\` with nothing installed: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+if ( "$(fnm ls)" -ne "* system" ) { echo "Expected fnm ls to be * system. Got $(fnm ls)"; exit 1 }"
+`;
+
+exports[`PowerShell basic usage: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install v8.11.3
+fnm use v8.11.3
+if ( "$(node --version)" -ne "v8.11.3" ) { echo "Expected node version to be v8.11.3. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`PowerShell resolves partial semver: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install 6
+fnm use 6
+if ( "$(node --version)" -ne "v6.17.1" ) { echo "Expected node version to be v6.17.1. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`PowerShell use on cd: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --use-on-cd | Out-String | Invoke-Expression
+fnm install v8.11.3
+fnm install v12.22.12
+cd subdir
+if ( "$(node --version)" -ne "v12.22.12" ) { echo "Expected node version to be v12.22.12. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`PowerShell when .node-version and .nvmrc are in sync, it throws no error: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install
+fnm use
+if ( "$(node --version)" -ne "v11.10.0" ) { echo "Expected node version to be v11.10.0. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`Zsh .node-version: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh .nvmrc: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh \`fnm ls\` with nothing installed: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+if [ "$(fnm ls)" != "* system" ]; then
+  echo "Expected fnm ls to be * system. Got $(fnm ls)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh basic usage: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install v8.11.3
+fnm use v8.11.3
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh resolves partial semver: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install 6
+fnm use 6
+if [ "$(node --version)" != "v6.17.1" ]; then
+  echo "Expected node version to be v6.17.1. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh use on cd: Zsh 1`] = `
+"set -e
+eval "$(fnm env --use-on-cd)"
+fnm install v8.11.3
+fnm install v12.22.12
+cd subdir
+if [ "$(node --version)" != "v12.22.12" ]; then
+  echo "Expected node version to be v12.22.12. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh when .node-version and .nvmrc are in sync, it throws no error: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+if [ "$(node --version)" != "v11.10.0" ]; then
+  echo "Expected node version to be v11.10.0. Got $(node --version)"
+  exit 1
+fi"
+`;

e2e/__snapshots__/current.test.ts.snap

@@ -0,0 +1,96 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash current returns the current Node.js version set in fnm: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+if [ "$(fnm current)" != "none" ]; then
+  echo "Expected currently activated version to be none. Got $(fnm current)"
+  exit 1
+fi
+fnm install v8.11.3
+fnm install v10.10.0
+fnm use v8.11.3
+if [ "$(fnm current)" != "v8.11.3" ]; then
+  echo "Expected currently activated version to be v8.11.3. Got $(fnm current)"
+  exit 1
+fi
+fnm use v10.10.0
+if [ "$(fnm current)" != "v10.10.0" ]; then
+  echo "Expected currently activated version to be v10.10.0. Got $(fnm current)"
+  exit 1
+fi
+fnm use system
+if [ "$(fnm current)" != "system" ]; then
+  echo "Expected currently activated version to be system. Got $(fnm current)"
+  exit 1
+fi"
+`;
+
+exports[`Fish current returns the current Node.js version set in fnm: Fish 1`] = `
+"fnm env | source
+set ____test____ (fnm current)
+if test "$____test____" != "none"
+  echo "Expected currently activated version to be none. Got $____test____"
+  exit 1
+end
+fnm install v8.11.3
+fnm install v10.10.0
+fnm use v8.11.3
+set ____test____ (fnm current)
+if test "$____test____" != "v8.11.3"
+  echo "Expected currently activated version to be v8.11.3. Got $____test____"
+  exit 1
+end
+fnm use v10.10.0
+set ____test____ (fnm current)
+if test "$____test____" != "v10.10.0"
+  echo "Expected currently activated version to be v10.10.0. Got $____test____"
+  exit 1
+end
+fnm use system
+set ____test____ (fnm current)
+if test "$____test____" != "system"
+  echo "Expected currently activated version to be system. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`PowerShell current returns the current Node.js version set in fnm: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+if ( "$(fnm current)" -ne "none" ) { echo "Expected currently activated version to be none. Got $(fnm current)"; exit 1 }
+fnm install v8.11.3
+fnm install v10.10.0
+fnm use v8.11.3
+if ( "$(fnm current)" -ne "v8.11.3" ) { echo "Expected currently activated version to be v8.11.3. Got $(fnm current)"; exit 1 }
+fnm use v10.10.0
+if ( "$(fnm current)" -ne "v10.10.0" ) { echo "Expected currently activated version to be v10.10.0. Got $(fnm current)"; exit 1 }
+fnm use system
+if ( "$(fnm current)" -ne "system" ) { echo "Expected currently activated version to be system. Got $(fnm current)"; exit 1 }"
+`;
+
+exports[`Zsh current returns the current Node.js version set in fnm: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+if [ "$(fnm current)" != "none" ]; then
+  echo "Expected currently activated version to be none. Got $(fnm current)"
+  exit 1
+fi
+fnm install v8.11.3
+fnm install v10.10.0
+fnm use v8.11.3
+if [ "$(fnm current)" != "v8.11.3" ]; then
+  echo "Expected currently activated version to be v8.11.3. Got $(fnm current)"
+  exit 1
+fi
+fnm use v10.10.0
+if [ "$(fnm current)" != "v10.10.0" ]; then
+  echo "Expected currently activated version to be v10.10.0. Got $(fnm current)"
+  exit 1
+fi
+fnm use system
+if [ "$(fnm current)" != "system" ]; then
+  echo "Expected currently activated version to be system. Got $(fnm current)"
+  exit 1
+fi"
+`;

e2e/__snapshots__/env.test.ts.snap

@@ -0,0 +1,18 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash outputs json: Bash 1`] = `
+"set -e
+fnm env --json > file.json"
+`;
+
+exports[`Fish outputs json: Fish 1`] = `"fnm env --json > file.json"`;
+
+exports[`PowerShell outputs json: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --json | Out-File file.json -Encoding UTF8"
+`;
+
+exports[`Zsh outputs json: Zsh 1`] = `
+"set -e
+fnm env --json > file.json"
+`;

e2e/__snapshots__/exec.test.ts.snap

@@ -0,0 +1,70 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash \`exec\` usage: Bash 1`] = `
+"set -e
+fnm install
+fnm install v6.10.0
+fnm install v10.10.0
+if [ "$(fnm exec -- node -v)" != "v8.10.0" ]; then
+  echo "Expected version file exec to be v8.10.0. Got $(fnm exec -- node -v)"
+  exit 1
+fi
+if [ "$(fnm exec --using=6 -- node -v)" != "v6.10.0" ]; then
+  echo "Expected exec:6 node -v to be v6.10.0. Got $(fnm exec --using=6 -- node -v)"
+  exit 1
+fi
+if [ "$(fnm exec --using=10 -- node -v)" != "v10.10.0" ]; then
+  echo "Expected exec:6 node -v to be v10.10.0. Got $(fnm exec --using=10 -- node -v)"
+  exit 1
+fi"
+`;
+
+exports[`Fish \`exec\` usage: Fish 1`] = `
+"fnm install
+fnm install v6.10.0
+fnm install v10.10.0
+set ____test____ (fnm exec -- node -v)
+if test "$____test____" != "v8.10.0"
+  echo "Expected version file exec to be v8.10.0. Got $____test____"
+  exit 1
+end
+set ____test____ (fnm exec --using=6 -- node -v)
+if test "$____test____" != "v6.10.0"
+  echo "Expected exec:6 node -v to be v6.10.0. Got $____test____"
+  exit 1
+end
+set ____test____ (fnm exec --using=10 -- node -v)
+if test "$____test____" != "v10.10.0"
+  echo "Expected exec:6 node -v to be v10.10.0. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`PowerShell \`exec\` usage: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm install
+fnm install v6.10.0
+fnm install v10.10.0
+if ( "$(fnm exec -- node -v)" -ne "v8.10.0" ) { echo "Expected version file exec to be v8.10.0. Got $(fnm exec -- node -v)"; exit 1 }
+if ( "$(fnm exec --using=6 -- node -v)" -ne "v6.10.0" ) { echo "Expected exec:6 node -v to be v6.10.0. Got $(fnm exec --using=6 -- node -v)"; exit 1 }
+if ( "$(fnm exec --using=10 -- node -v)" -ne "v10.10.0" ) { echo "Expected exec:6 node -v to be v10.10.0. Got $(fnm exec --using=10 -- node -v)"; exit 1 }"
+`;
+
+exports[`Zsh \`exec\` usage: Zsh 1`] = `
+"set -e
+fnm install
+fnm install v6.10.0
+fnm install v10.10.0
+if [ "$(fnm exec -- node -v)" != "v8.10.0" ]; then
+  echo "Expected version file exec to be v8.10.0. Got $(fnm exec -- node -v)"
+  exit 1
+fi
+if [ "$(fnm exec --using=6 -- node -v)" != "v6.10.0" ]; then
+  echo "Expected exec:6 node -v to be v6.10.0. Got $(fnm exec --using=6 -- node -v)"
+  exit 1
+fi
+if [ "$(fnm exec --using=10 -- node -v)" != "v10.10.0" ]; then
+  echo "Expected exec:6 node -v to be v10.10.0. Got $(fnm exec --using=10 -- node -v)"
+  exit 1
+fi"
+`;

e2e/__snapshots__/existing-installation.test.ts.snap

@@ -0,0 +1,28 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash warns about an existing installation: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install v8.11.3
+(fnm install v8.11.3 2>&1) | grep 'already installed' || (echo "Expected output to contain 'already installed'" && exit 1)"
+`;
+
+exports[`Fish warns about an existing installation: Fish 1`] = `
+"fnm env | source
+fnm install v8.11.3
+begin; fnm install v8.11.3 2>&1; end | grep 'already installed'; or echo "Expected output to contain 'already installed'" && exit 1"
+`;
+
+exports[`PowerShell warns about an existing installation: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install v8.11.3
+$($__out__ = $(fnm install v8.11.3 2>&1 | Select-String 'already installed'); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`Zsh warns about an existing installation: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install v8.11.3
+(fnm install v8.11.3 2>&1) | grep 'already installed' || (echo "Expected output to contain 'already installed'" && exit 1)"
+`;

e2e/__snapshots__/latest-lts.test.ts.snap

@@ -0,0 +1,32 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash installs latest lts: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install --lts
+(fnm ls) | grep lts-latest || (echo "Expected output to contain lts-latest" && exit 1)
+fnm use 'lts/*'"
+`;
+
+exports[`Fish installs latest lts: Fish 1`] = `
+"fnm env | source
+fnm install --lts
+begin; fnm ls; end | grep lts-latest; or echo "Expected output to contain lts-latest" && exit 1
+fnm use 'lts/*'"
+`;
+
+exports[`PowerShell installs latest lts: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install --lts
+$($__out__ = $(fnm ls | Select-String lts-latest); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+fnm use 'lts/*'"
+`;
+
+exports[`Zsh installs latest lts: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install --lts
+(fnm ls) | grep lts-latest || (echo "Expected output to contain lts-latest" && exit 1)
+fnm use 'lts/*'"
+`;

e2e/__snapshots__/log-level.test.ts.snap

@@ -0,0 +1,127 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash "quiet" log level: Bash 1`] = `
+"set -e
+eval "$(fnm env --log-level=quiet)"
+if [ "$(fnm install v8.11.3)" != "" ]; then
+  echo "Expected fnm install to be . Got $(fnm install v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm use v8.11.3)" != "" ]; then
+  echo "Expected fnm use to be . Got $(fnm use v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm alias v8.11.3 something)" != "" ]; then
+  echo "Expected fnm alias to be . Got $(fnm alias v8.11.3 something)"
+  exit 1
+fi"
+`;
+
+exports[`Bash error log level: Bash 1`] = `
+"set -e
+eval "$(fnm env --log-level=error)"
+if [ "$(fnm install v8.11.3)" != "" ]; then
+  echo "Expected fnm install to be . Got $(fnm install v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm use v8.11.3)" != "" ]; then
+  echo "Expected fnm use to be . Got $(fnm use v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm alias v8.11.3 something)" != "" ]; then
+  echo "Expected fnm alias to be . Got $(fnm alias v8.11.3 something)"
+  exit 1
+fi
+(fnm alias abcd efg 2>&1) | grep "find requested version" || (echo "Expected output to contain "find requested version"" && exit 1)"
+`;
+
+exports[`Fish "quiet" log level: Fish 1`] = `
+"fnm env --log-level=quiet | source
+set ____test____ (fnm install v8.11.3)
+if test "$____test____" != ""
+  echo "Expected fnm install to be . Got $____test____"
+  exit 1
+end
+set ____test____ (fnm use v8.11.3)
+if test "$____test____" != ""
+  echo "Expected fnm use to be . Got $____test____"
+  exit 1
+end
+set ____test____ (fnm alias v8.11.3 something)
+if test "$____test____" != ""
+  echo "Expected fnm alias to be . Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`Fish error log level: Fish 1`] = `
+"fnm env --log-level=error | source
+set ____test____ (fnm install v8.11.3)
+if test "$____test____" != ""
+  echo "Expected fnm install to be . Got $____test____"
+  exit 1
+end
+set ____test____ (fnm use v8.11.3)
+if test "$____test____" != ""
+  echo "Expected fnm use to be . Got $____test____"
+  exit 1
+end
+set ____test____ (fnm alias v8.11.3 something)
+if test "$____test____" != ""
+  echo "Expected fnm alias to be . Got $____test____"
+  exit 1
+end
+begin; fnm alias abcd efg 2>&1; end | grep "find requested version"; or echo "Expected output to contain "find requested version"" && exit 1"
+`;
+
+exports[`PowerShell "quiet" log level: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --log-level=quiet | Out-String | Invoke-Expression
+if ( "$(fnm install v8.11.3)" -ne "" ) { echo "Expected fnm install to be . Got $(fnm install v8.11.3)"; exit 1 }
+if ( "$(fnm use v8.11.3)" -ne "" ) { echo "Expected fnm use to be . Got $(fnm use v8.11.3)"; exit 1 }
+if ( "$(fnm alias v8.11.3 something)" -ne "" ) { echo "Expected fnm alias to be . Got $(fnm alias v8.11.3 something)"; exit 1 }"
+`;
+
+exports[`PowerShell error log level: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --log-level=error | Out-String | Invoke-Expression
+if ( "$(fnm install v8.11.3)" -ne "" ) { echo "Expected fnm install to be . Got $(fnm install v8.11.3)"; exit 1 }
+if ( "$(fnm use v8.11.3)" -ne "" ) { echo "Expected fnm use to be . Got $(fnm use v8.11.3)"; exit 1 }
+if ( "$(fnm alias v8.11.3 something)" -ne "" ) { echo "Expected fnm alias to be . Got $(fnm alias v8.11.3 something)"; exit 1 }
+$($__out__ = $(fnm alias abcd efg 2>&1 | Select-String "find requested version"); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`Zsh "quiet" log level: Zsh 1`] = `
+"set -e
+eval "$(fnm env --log-level=quiet)"
+if [ "$(fnm install v8.11.3)" != "" ]; then
+  echo "Expected fnm install to be . Got $(fnm install v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm use v8.11.3)" != "" ]; then
+  echo "Expected fnm use to be . Got $(fnm use v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm alias v8.11.3 something)" != "" ]; then
+  echo "Expected fnm alias to be . Got $(fnm alias v8.11.3 something)"
+  exit 1
+fi"
+`;
+
+exports[`Zsh error log level: Zsh 1`] = `
+"set -e
+eval "$(fnm env --log-level=error)"
+if [ "$(fnm install v8.11.3)" != "" ]; then
+  echo "Expected fnm install to be . Got $(fnm install v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm use v8.11.3)" != "" ]; then
+  echo "Expected fnm use to be . Got $(fnm use v8.11.3)"
+  exit 1
+fi
+if [ "$(fnm alias v8.11.3 something)" != "" ]; then
+  echo "Expected fnm alias to be . Got $(fnm alias v8.11.3 something)"
+  exit 1
+fi
+(fnm alias abcd efg 2>&1) | grep "find requested version" || (echo "Expected output to contain "find requested version"" && exit 1)"
+`;

e2e/__snapshots__/multishell.test.ts.snap

@@ -0,0 +1,67 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash multishell changes don't affect parent: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install v8.11.3
+fnm install v11.9.0
+echo 'set -e
+eval "$(fnm env)"
+fnm use v11
+if [ "$(node --version)" != "v11.9.0" ]; then
+  echo "Expected node version to be v11.9.0. Got $(node --version)"
+  exit 1
+fi' | bash
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Fish multishell changes don't affect parent: Fish 1`] = `
+"fnm env | source
+fnm install v8.11.3
+fnm install v11.9.0
+fish -c 'fnm env | source
+fnm use v11
+set ____test____ (node --version)
+if test "$____test____" != "v11.9.0"
+  echo "Expected node version to be v11.9.0. Got $____test____"
+  exit 1
+end'
+set ____test____ (node --version)
+if test "$____test____" != "v8.11.3"
+  echo "Expected node version to be v8.11.3. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`PowerShell multishell changes don't affect parent: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install v8.11.3
+fnm install v11.9.0
+echo '$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm use v11
+if ( "$(node --version)" -ne "v11.9.0" ) { echo "Expected node version to be v11.9.0. Got $(node --version)"; exit 1 }' | pwsh -NoProfile
+if ( "$(node --version)" -ne "v8.11.3" ) { echo "Expected node version to be v8.11.3. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`Zsh multishell changes don't affect parent: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install v8.11.3
+fnm install v11.9.0
+echo 'set -e
+eval "$(fnm env)"
+fnm use v11
+if [ "$(node --version)" != "v11.9.0" ]; then
+  echo "Expected node version to be v11.9.0. Got $(node --version)"
+  exit 1
+fi' | zsh
+if [ "$(node --version)" != "v8.11.3" ]; then
+  echo "Expected node version to be v8.11.3. Got $(node --version)"
+  exit 1
+fi"
+`;

e2e/__snapshots__/nvmrc-lts.test.ts.snap

@@ -0,0 +1,32 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash uses .nvmrc with lts definition: Bash 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+(fnm ls) | grep lts-dubnium || (echo "Expected output to contain lts-dubnium" && exit 1)"
+`;
+
+exports[`Fish uses .nvmrc with lts definition: Fish 1`] = `
+"fnm env | source
+fnm install
+fnm use
+begin; fnm ls; end | grep lts-dubnium; or echo "Expected output to contain lts-dubnium" && exit 1"
+`;
+
+exports[`PowerShell uses .nvmrc with lts definition: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+fnm install
+fnm use
+$($__out__ = $(fnm ls | Select-String lts-dubnium); if ($__out__ -eq $null) { exit 1 } else { $__out__ })"
+`;
+
+exports[`Zsh uses .nvmrc with lts definition: Zsh 1`] = `
+"set -e
+eval "$(fnm env)"
+fnm install
+fnm use
+(fnm ls) | grep lts-dubnium || (echo "Expected output to contain lts-dubnium" && exit 1)"
+`;

e2e/__snapshots__/shims.test.ts.snap

@@ -0,0 +1,59 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash outputs json: Bash 1`] = `
+"set -e
+fnm env --json --with-shims > file.json"
+`;
+
+exports[`Bash runs Node through a shim: Bash 1`] = `
+"set -e
+eval "$(fnm env --with-shims)"
+fnm install 12.0.0
+fnm use 12.0.0
+if [ "$(node --version)" != "v12.0.0" ]; then
+  echo "Expected node version to be v12.0.0. Got $(node --version)"
+  exit 1
+fi"
+`;
+
+exports[`Fish outputs json: Fish 1`] = `"fnm env --json --with-shims > file.json"`;
+
+exports[`Fish runs Node through a shim: Fish 1`] = `
+"fnm env --with-shims | source
+fnm install 12.0.0
+fnm use 12.0.0
+set ____test____ (node --version)
+if test "$____test____" != "v12.0.0"
+  echo "Expected node version to be v12.0.0. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`PowerShell outputs json: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --json --with-shims | Out-File file.json -Encoding UTF8"
+`;
+
+exports[`PowerShell runs Node through a shim: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm env --with-shims | Out-String | Invoke-Expression
+fnm install 12.0.0
+fnm use 12.0.0
+if ( "$(node --version)" -ne "v12.0.0" ) { echo "Expected node version to be v12.0.0. Got $(node --version)"; exit 1 }"
+`;
+
+exports[`Zsh outputs json: Zsh 1`] = `
+"set -e
+fnm env --json --with-shims > file.json"
+`;
+
+exports[`Zsh runs Node through a shim: Zsh 1`] = `
+"set -e
+eval "$(fnm env --with-shims)"
+fnm install 12.0.0
+fnm use 12.0.0
+if [ "$(node --version)" != "v12.0.0" ]; then
+  echo "Expected node version to be v12.0.0. Got $(node --version)"
+  exit 1
+fi"
+`;

e2e/__snapshots__/uninstall.test.ts.snap

@@ -0,0 +1,46 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bash uninstalls a version: Bash 1`] = `
+"set -e
+fnm install 12.0.0
+fnm alias 12.0.0 hello
+((fnm ls) | grep v12.0.0 || (echo "Expected output to contain v12.0.0" && exit 1)) | grep hello || (echo "Expected output to contain hello" && exit 1)
+fnm uninstall hello
+if [ "$(fnm ls)" != "* system" ]; then
+  echo "Expected fnm ls to be * system. Got $(fnm ls)"
+  exit 1
+fi"
+`;
+
+exports[`Fish uninstalls a version: Fish 1`] = `
+"fnm install 12.0.0
+fnm alias 12.0.0 hello
+begin; begin; fnm ls; end | grep v12.0.0; or echo "Expected output to contain v12.0.0" && exit 1; end | grep hello; or echo "Expected output to contain hello" && exit 1
+fnm uninstall hello
+set ____test____ (fnm ls)
+if test "$____test____" != "* system"
+  echo "Expected fnm ls to be * system. Got $____test____"
+  exit 1
+end"
+`;
+
+exports[`PowerShell uninstalls a version: PowerShell 1`] = `
+"$ErrorActionPreference = "Stop"
+fnm install 12.0.0
+fnm alias 12.0.0 hello
+$($__out__ = $($($__out__ = $(fnm ls | Select-String v12.0.0); if ($__out__ -eq $null) { exit 1 } else { $__out__ }) | Select-String hello); if ($__out__ -eq $null) { exit 1 } else { $__out__ })
+fnm uninstall hello
+if ( "$(fnm ls)" -ne "* system" ) { echo "Expected fnm ls to be * system. Got $(fnm ls)"; exit 1 }"
+`;
+
+exports[`Zsh uninstalls a version: Zsh 1`] = `
+"set -e
+fnm install 12.0.0
+fnm alias 12.0.0 hello
+((fnm ls) | grep v12.0.0 || (echo "Expected output to contain v12.0.0" && exit 1)) | grep hello || (echo "Expected output to contain hello" && exit 1)
+fnm uninstall hello
+if [ "$(fnm ls)" != "* system" ]; then
+  echo "Expected fnm ls to be * system. Got $(fnm ls)"
+  exit 1
+fi"
+`;

e2e/aliases.test.ts

@@ -0,0 +1,129 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, Zsh } from "./shellcode/shells.js"
+import describe from "./describe.js"
+import { writeFile } from "node:fs/promises"
+import path from "node:path"
+import testCwd from "./shellcode/test-cwd.js"
+import getStderr from "./shellcode/get-stderr.js"
+import testNodeVersion from "./shellcode/test-node-version.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell]) {
+  describe(shell, () => {
+    test(`allows to install an lts if version missing`, async () => {
+      await writeFile(path.join(testCwd(), ".node-version"), "lts/*")
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["use", "--install-if-missing"]))
+        .then(
+          shell.scriptOutputContains(shell.call("fnm", ["ls"]), "lts-latest")
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`errors when alias is not found`, async () => {
+      await writeFile(path.join(testCwd(), ".node-version"), "lts/*")
+      await script(shell)
+        .then(shell.env({ logLevel: "error" }))
+        .then(
+          shell.scriptOutputContains(
+            getStderr(shell.call("fnm", ["use"])),
+            "'Requested version lts-latest is not'"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`unalias a version`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "11.10.0"]))
+        .then(shell.call("fnm", ["install", "8.11.3"]))
+        .then(shell.call("fnm", ["alias", "8.11.3", "version8"]))
+        .then(shell.scriptOutputContains(shell.call("fnm", ["ls"]), "version8"))
+        .then(shell.call("fnm", ["unalias", "version8"]))
+        .then(
+          shell.scriptOutputContains(
+            getStderr(shell.call("fnm", ["use", "version8"])),
+            "'Requested version version8 is not currently installed'"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`unalias errors if alias not found`, async () => {
+      await script(shell)
+        .then(shell.env({ logLevel: "error" }))
+        .then(
+          shell.scriptOutputContains(
+            getStderr(shell.call("fnm", ["unalias", "lts"])),
+            "'Requested alias lts not found'"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`can alias the system node`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["alias", "system", "my_system"]))
+        .then(
+          shell.scriptOutputContains(shell.call("fnm", ["ls"]), "my_system")
+        )
+        .then(shell.call("fnm", ["alias", "system", "default"]))
+        .then(shell.call("fnm", ["alias", "my_system", "my_system2"]))
+        .then(
+          shell.scriptOutputContains(shell.call("fnm", ["ls"]), "my_system2")
+        )
+        .then(
+          shell.scriptOutputContains(
+            shell.call("fnm", ["use", "my_system"]),
+            "'Bypassing fnm'"
+          )
+        )
+        .then(shell.call("fnm", ["unalias", "my_system"]))
+        .then(
+          shell.scriptOutputContains(
+            getStderr(shell.call("fnm", ["use", "my_system"])),
+            "'Requested version my_system is not currently installed'"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`aliasing versions`, async () => {
+      const installedVersions = shell.call("fnm", ["ls"])
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "6.11.3"]))
+        .then(shell.call("fnm", ["install", "8.11.3"]))
+        .then(shell.call("fnm", ["alias", "8.11", "oldie"]))
+        .then(shell.call("fnm", ["alias", "6", "older"]))
+        .then(shell.call("fnm", ["default", "older"]))
+        .then(
+          shell.scriptOutputContains(
+            shell.scriptOutputContains(installedVersions, "8.11.3"),
+            "oldie"
+          )
+        )
+        .then(
+          shell.scriptOutputContains(
+            shell.scriptOutputContains(installedVersions, "6.11.3"),
+            "older"
+          )
+        )
+        .then(shell.call("fnm", ["use", "older"]))
+        .then(testNodeVersion(shell, "v6.11.3"))
+        .then(shell.call("fnm", ["use", "oldie"]))
+        .then(testNodeVersion(shell, "v8.11.3"))
+        .then(shell.call("fnm", ["use", "default"]))
+        .then(testNodeVersion(shell, "v6.11.3"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/basic.test.ts

@@ -0,0 +1,93 @@
+import { writeFile, mkdir } from "node:fs/promises"
+import { join } from "node:path"
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, WinCmd, Zsh } from "./shellcode/shells.js"
+import testCwd from "./shellcode/test-cwd.js"
+import testNodeVersion from "./shellcode/test-node-version.js"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell, WinCmd]) {
+  describe(shell, () => {
+    test(`basic usage`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "v8.11.3"]))
+        .then(shell.call("fnm", ["use", "v8.11.3"]))
+        .then(testNodeVersion(shell, "v8.11.3"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`.nvmrc`, async () => {
+      await writeFile(join(testCwd(), ".nvmrc"), "v8.11.3")
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install"]))
+        .then(shell.call("fnm", ["use"]))
+        .then(testNodeVersion(shell, "v8.11.3"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`.node-version`, async () => {
+      await writeFile(join(testCwd(), ".node-version"), "v8.11.3")
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install"]))
+        .then(shell.call("fnm", ["use"]))
+        .then(testNodeVersion(shell, "v8.11.3"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`use on cd`, async () => {
+      await mkdir(join(testCwd(), "subdir"), { recursive: true })
+      await writeFile(join(testCwd(), "subdir", ".node-version"), "v12.22.12")
+      await script(shell)
+        .then(shell.env({ useOnCd: true }))
+        .then(shell.call("fnm", ["install", "v8.11.3"]))
+        .then(shell.call("fnm", ["install", "v12.22.12"]))
+        .then(shell.call("cd", ["subdir"]))
+        .then(testNodeVersion(shell, "v12.22.12"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`resolves partial semver`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "6"]))
+        .then(shell.call("fnm", ["use", "6"]))
+        .then(testNodeVersion(shell, "v6.17.1"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test("`fnm ls` with nothing installed", async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["ls"]),
+            "* system",
+            "fnm ls"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test(`when .node-version and .nvmrc are in sync, it throws no error`, async () => {
+      await writeFile(join(testCwd(), ".nvmrc"), "v11.10.0")
+      await writeFile(join(testCwd(), ".node-version"), "v11.10.0")
+
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install"]))
+        .then(shell.call("fnm", ["use"]))
+        .then(testNodeVersion(shell, "v11.10.0"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/current.test.ts

@@ -0,0 +1,47 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, WinCmd, Zsh } from "./shellcode/shells.js"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell, WinCmd]) {
+  describe(shell, () => {
+    test(`current returns the current Node.js version set in fnm`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["current"]),
+            "none",
+            "currently activated version"
+          )
+        )
+        .then(shell.call("fnm", ["install", "v8.11.3"]))
+        .then(shell.call("fnm", ["install", "v10.10.0"]))
+        .then(shell.call("fnm", ["use", "v8.11.3"]))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["current"]),
+            "v8.11.3",
+            "currently activated version"
+          )
+        )
+        .then(shell.call("fnm", ["use", "v10.10.0"]))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["current"]),
+            "v10.10.0",
+            "currently activated version"
+          )
+        )
+        .then(shell.call("fnm", ["use", "system"]))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["current"]),
+            "system",
+            "currently activated version"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/describe.ts

@@ -0,0 +1,15 @@
+import { WinCmd } from "./shellcode/shells.js"
+import { Shell } from "./shellcode/shells/types.js"
+
+export default function describe(
+  shell: Pick<Shell, "name">,
+  fn: () => void
+): void {
+  if (shell === WinCmd) {
+    // wincmd tests do not work right now and I don't have a Windows machine to fix it
+    // maybe in the future when I have some time to spin a VM to check what's happening.
+    return globalThis.describe.skip("WinCmd", fn)
+  }
+
+  globalThis.describe(shell.name(), fn)
+}

e2e/env.test.ts

@@ -0,0 +1,35 @@
+import { readFile } from "node:fs/promises"
+import { join } from "node:path"
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, WinCmd, Zsh } from "./shellcode/shells.js"
+import testCwd from "./shellcode/test-cwd.js"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell, WinCmd]) {
+  describe(shell, () => {
+    test(`outputs json`, async () => {
+      const filename = `file.json`
+      await script(shell)
+        .then(
+          shell.redirectOutput(shell.call("fnm", ["env", "--json"]), {
+            output: filename,
+          })
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+
+      if (shell.currentlySupported()) {
+        const file = await readFile(join(testCwd(), filename), "utf8")
+        expect(JSON.parse(file)).toEqual({
+          FNM_ARCH: expect.any(String),
+          FNM_DIR: expect.any(String),
+          FNM_LOGLEVEL: "info",
+          FNM_MULTISHELL_PATH: expect.any(String),
+          FNM_NODE_DIST_MIRROR: expect.any(String),
+          FNM_VERSION_FILE_STRATEGY: "local",
+          FNM_VERSION_SWITCH_STRATEGY: "path-symlink",
+        })
+      }
+    })
+  })
+}

e2e/exec.test.ts

@@ -0,0 +1,42 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, WinCmd, Zsh } from "./shellcode/shells.js"
+import testCwd from "./shellcode/test-cwd.js"
+import fs from "node:fs/promises"
+import path from "node:path"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell, WinCmd]) {
+  describe(shell, () => {
+    test("`exec` usage", async () => {
+      await fs.writeFile(path.join(testCwd(), ".nvmrc"), "v8.10.0")
+
+      await script(shell)
+        .then(shell.call("fnm", ["install"]))
+        .then(shell.call("fnm", ["install", "v6.10.0"]))
+        .then(shell.call("fnm", ["install", "v10.10.0"]))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["exec", "--", "node", "-v"]),
+            "v8.10.0",
+            "version file exec"
+          )
+        )
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["exec", "--using=6", "--", "node", "-v"]),
+            "v6.10.0",
+            "exec:6 node -v"
+          )
+        )
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["exec", "--using=10", "--", "node", "-v"]),
+            "v10.10.0",
+            "exec:6 node -v"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/existing-installation.test.ts

@@ -0,0 +1,22 @@
+import getStderr from "./shellcode/get-stderr.js"
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, Zsh } from "./shellcode/shells.js"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell]) {
+  describe(shell, () => {
+    test(`warns about an existing installation`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "v8.11.3"]))
+        .then(
+          shell.scriptOutputContains(
+            getStderr(shell.call("fnm", ["install", "v8.11.3"])),
+            "'already installed'"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/latest-lts.test.ts

@@ -0,0 +1,19 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, Zsh } from "./shellcode/shells.js"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell]) {
+  describe(shell, () => {
+    test(`installs latest lts`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "--lts"]))
+        .then(
+          shell.scriptOutputContains(shell.call("fnm", ["ls"]), "lts-latest")
+        )
+        .then(shell.call("fnm", ["use", "'lts/*'"]))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/log-level.test.ts

@@ -0,0 +1,71 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, Zsh } from "./shellcode/shells.js"
+import describe from "./describe.js"
+import getStderr from "./shellcode/get-stderr.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell]) {
+  describe(shell, () => {
+    test(`"quiet" log level`, async () => {
+      await script(shell)
+        .then(shell.env({ logLevel: "quiet" }))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["install", "v8.11.3"]),
+            "",
+            "fnm install"
+          )
+        )
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["use", "v8.11.3"]),
+            "",
+            "fnm use"
+          )
+        )
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["alias", "v8.11.3", "something"]),
+            "",
+            "fnm alias"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+
+    test("error log level", async () => {
+      await script(shell)
+        .then(shell.env({ logLevel: "error" }))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["install", "v8.11.3"]),
+            "",
+            "fnm install"
+          )
+        )
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["use", "v8.11.3"]),
+            "",
+            "fnm use"
+          )
+        )
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["alias", "v8.11.3", "something"]),
+            "",
+            "fnm alias"
+          )
+        )
+        .then(
+          shell.scriptOutputContains(
+            getStderr(shell.call("fnm", ["alias", "abcd", "efg"])),
+            `"find requested version"`
+          )
+        )
+
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/multishell.test.ts

@@ -0,0 +1,27 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, Zsh } from "./shellcode/shells.js"
+import testNodeVersion from "./shellcode/test-node-version.js"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell]) {
+  describe(shell, () => {
+    test(`multishell changes don't affect parent`, async () => {
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "v8.11.3"]))
+        .then(shell.call("fnm", ["install", "v11.9.0"]))
+        .then(
+          shell.inSubShell(
+            script(shell)
+              .then(shell.env({}))
+              .then(shell.call("fnm", ["use", "v11"]))
+              .then(testNodeVersion(shell, "v11.9.0"))
+              .asLine()
+          )
+        )
+        .then(testNodeVersion(shell, "v8.11.3"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/nvmrc-lts.test.ts

@@ -0,0 +1,24 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, Zsh } from "./shellcode/shells.js"
+import fs from "node:fs/promises"
+import path from "node:path"
+import describe from "./describe.js"
+import testCwd from "./shellcode/test-cwd.js"
+
+for (const shell of [Bash, Fish, PowerShell, Zsh]) {
+  describe(shell, () => {
+    test(`uses .nvmrc with lts definition`, async () => {
+      await fs.writeFile(path.join(testCwd(), ".nvmrc"), `lts/dubnium`)
+
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install"]))
+        .then(shell.call("fnm", ["use"]))
+        .then(
+          shell.scriptOutputContains(shell.call("fnm", ["ls"]), "lts-dubnium")
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/shellcode/get-stderr.ts

@@ -0,0 +1,3 @@
+export default function getStderr(script: string): string {
+  return `${script} 2>&1`
+}

e2e/shellcode/script.ts

@@ -0,0 +1,179 @@
+import { ScriptLine, Shell } from "./shells/types.js"
+import { execa, type ExecaChildProcess } from "execa"
+import testTmpDir from "./test-tmp-dir.js"
+import { Writable } from "node:stream"
+import { dedent } from "ts-dedent"
+import testCwd from "./test-cwd.js"
+import path, { join } from "node:path"
+import { writeFile } from "node:fs/promises"
+import chalk from "chalk"
+import testBinDir from "./test-bin-dir.js"
+
+class Script {
+  constructor(
+    private readonly config: {
+      fnmDir: string
+    },
+    private readonly lines: ScriptLine[]
+  ) {}
+  then(line: ScriptLine): Script {
+    return new Script(this.config, [...this.lines, line])
+  }
+
+  takeSnapshot(shell: Pick<Shell, "name">): this {
+    const script = this.lines.join("\n")
+    expect(script).toMatchSnapshot(shell.name())
+
+    return this
+  }
+
+  async execute(
+    shell: Pick<
+      Shell,
+      "binaryName" | "launchArgs" | "currentlySupported" | "forceFile"
+    >
+  ): Promise<void> {
+    if (!shell.currentlySupported()) {
+      return
+    }
+
+    const args = [...shell.launchArgs()]
+
+    if (shell.forceFile) {
+      let filename = join(testTmpDir(), "script")
+      if (typeof shell.forceFile === "string") {
+        filename = filename + shell.forceFile
+      }
+      await writeFile(filename, [...this.lines, "exit 0"].join("\n"))
+      args.push(filename)
+    }
+
+    const child = execa(shell.binaryName(), args, {
+      stdio: [shell.forceFile ? "ignore" : "pipe", "pipe", "pipe"],
+      cwd: testCwd(),
+      env: (() => {
+        const newProcessEnv: Record<string, string> = {
+          ...removeAllFnmEnvVars(process.env),
+          PATH: [testBinDir(), fnmTargetDir(), process.env.PATH]
+            .filter(Boolean)
+            .join(path.delimiter),
+          FNM_DIR: this.config.fnmDir,
+        }
+
+        delete newProcessEnv.NODE_OPTIONS
+        return newProcessEnv
+      })(),
+      extendEnv: false,
+      reject: false,
+    })
+
+    if (child.stdin) {
+      const childStdin = child.stdin
+
+      for (const line of this.lines) {
+        await write(childStdin, `${line}\n`)
+      }
+
+      await write(childStdin, "exit 0\n")
+    }
+
+    const { stdout, stderr } = streamOutputsAndBuffer(child)
+
+    const finished = await child
+
+    if (finished.failed) {
+      console.error(
+        dedent`
+          Script failed.
+            code ${finished.exitCode}
+            signal ${finished.signal}
+
+          stdout:
+          ${padAllLines(stdout.join(""), 2)}
+
+          stderr:
+          ${padAllLines(stderr.join(""), 2)}
+        `
+      )
+
+      throw new Error(
+        `Script failed on ${testCwd()} with code ${finished.exitCode}`
+      )
+    }
+  }
+
+  asLine(): ScriptLine {
+    return this.lines.join("\n")
+  }
+}
+
+function streamOutputsAndBuffer(child: ExecaChildProcess) {
+  const stdout: string[] = []
+  const stderr: string[] = []
+  const testName = expect.getState().currentTestName ?? "unknown"
+  const testPath = expect.getState().testPath ?? "unknown"
+
+  const stdoutPrefix = chalk.cyan.dim(`[stdout] ${testPath}/${testName}: `)
+  const stderrPrefix = chalk.magenta.dim(`[stderr] ${testPath}/${testName}: `)
+
+  if (child.stdout) {
+    child.stdout.on("data", (data) => {
+      const line = data.toString().trim()
+      if (line) {
+        process.stdout.write(`${stdoutPrefix}${line}\n`)
+      }
+      stdout.push(data.toString())
+    })
+  }
+
+  if (child.stderr) {
+    child.stderr.on("data", (data) => {
+      const line = data.toString().trim()
+      if (line) {
+        process.stdout.write(`${stderrPrefix}${line}\n`)
+      }
+      stderr.push(data.toString())
+    })
+  }
+
+  return { stdout, stderr }
+}
+
+function padAllLines(text: string, padding: number): string {
+  return text
+    .split("\n")
+    .map((line) => " ".repeat(padding) + line)
+    .join("\n")
+}
+
+function write(writable: Writable, text: string): Promise<void> {
+  return new Promise<void>((resolve, reject) => {
+    writable.write(text, (err) => {
+      if (err) return reject(err)
+      return resolve()
+    })
+  })
+}
+
+export function script(shell: Pick<Shell, "dieOnErrors">): Script {
+  const fnmDir = path.join(testTmpDir(), "fnm")
+  return new Script({ fnmDir }, shell.dieOnErrors ? [shell.dieOnErrors()] : [])
+}
+
+function removeAllFnmEnvVars(obj: NodeJS.ProcessEnv): NodeJS.ProcessEnv {
+  const result: NodeJS.ProcessEnv = {}
+  for (const [key, value] of Object.entries(obj)) {
+    if (!key.startsWith("FNM_")) {
+      result[key] = value
+    }
+  }
+  return result
+}
+
+function fnmTargetDir(): string {
+  return path.join(
+    process.cwd(),
+    "target",
+    process.env.FNM_TARGET_NAME ?? "debug"
+  )
+}

e2e/shellcode/shells.ts

@@ -0,0 +1,97 @@
+import { cmdCall } from "./shells/cmdCall.js"
+import { cmdEnv } from "./shells/cmdEnv.js"
+import { cmdExpectCommandOutput } from "./shells/expect-command-output.js"
+import { cmdHasOutputContains } from "./shells/output-contains.js"
+import { redirectOutput } from "./shells/redirect-output.js"
+import { cmdInSubShell } from "./shells/sub-shell.js"
+import { define, Shell } from "./shells/types.js"
+
+export const Bash = {
+  ...define<Shell>({
+    binaryName: () => "bash",
+    currentlySupported: () => true,
+    name: () => "Bash",
+    launchArgs: () => ["-i"],
+    escapeText: (x) => x,
+    dieOnErrors: () => `set -e`,
+  }),
+  ...cmdEnv.bash,
+  ...cmdCall.all,
+  ...redirectOutput.bash,
+  ...cmdExpectCommandOutput.bash,
+  ...cmdHasOutputContains.bash,
+  ...cmdInSubShell.bash,
+}
+
+export const Zsh = {
+  ...define<Shell>({
+    binaryName: () => "zsh",
+    currentlySupported: () => process.platform !== "win32",
+    name: () => "Zsh",
+    launchArgs: () => [],
+    escapeText: (x) => x,
+    dieOnErrors: () => `set -e`,
+  }),
+  ...cmdEnv.bash,
+  ...cmdCall.all,
+  ...redirectOutput.bash,
+  ...cmdExpectCommandOutput.bash,
+  ...cmdHasOutputContains.bash,
+  ...cmdInSubShell.zsh,
+}
+
+export const Fish = {
+  ...define<Shell>({
+    binaryName: () => "fish",
+    currentlySupported: () => process.platform !== "win32",
+    name: () => "Fish",
+    launchArgs: () => [],
+    escapeText: (x) => x,
+    forceFile: true,
+  }),
+  ...cmdEnv.fish,
+  ...cmdCall.all,
+  ...redirectOutput.bash,
+  ...cmdExpectCommandOutput.fish,
+  ...cmdHasOutputContains.fish,
+  ...cmdInSubShell.fish,
+}
+
+export const PowerShell = {
+  ...define<Shell>({
+    binaryName: () => "pwsh",
+    forceFile: ".ps1",
+    currentlySupported: () => true,
+    name: () => "PowerShell",
+    launchArgs: () => ["-NoProfile"],
+    escapeText: (x) => x,
+    dieOnErrors: () => `$ErrorActionPreference = "Stop"`,
+  }),
+  ...cmdEnv.powershell,
+  ...cmdCall.all,
+  ...redirectOutput.powershell,
+  ...cmdExpectCommandOutput.powershell,
+  ...cmdHasOutputContains.powershell,
+  ...cmdInSubShell.powershell,
+}
+
+export const WinCmd = {
+  ...define<Shell>({
+    binaryName: () => "cmd.exe",
+    currentlySupported: () => process.platform === "win32",
+    name: () => "Windows Command Prompt",
+    launchArgs: () => [],
+    escapeText: (str) =>
+      str
+        .replace(/\r/g, "")
+        .replace(/\n/g, "^\n\n")
+        .replace(/\%/g, "%%")
+        .replace(/\|/g, "^|")
+        .replace(/\(/g, "^(")
+        .replace(/\)/g, "^)"),
+  }),
+  ...cmdEnv.wincmd,
+  ...cmdCall.all,
+  ...cmdExpectCommandOutput.wincmd,
+  ...redirectOutput.bash,
+}

e2e/shellcode/shells/cmdCall.ts

@@ -0,0 +1,12 @@
+import { define, ScriptLine } from "./types.js"
+
+export type HasCall = {
+  call: (binary: string, args: string[]) => ScriptLine
+}
+
+export const cmdCall = {
+  all: define<HasCall>({
+    call: (binary: string, args: string[]) =>
+      `${binary} ${args.join(" ")}` as ScriptLine,
+  }),
+}

e2e/shellcode/shells/cmdEnv.ts

@@ -0,0 +1,33 @@
+import { ScriptLine, define } from "./types.js"
+
+type EnvConfig = { useOnCd: boolean; logLevel: string; args: string[] }
+export type HasEnv = { env(cfg: Partial<EnvConfig>): ScriptLine }
+
+function stringify(envConfig: Partial<EnvConfig> = {}) {
+  const { useOnCd, logLevel, args } = envConfig
+  return [
+    `fnm env`,
+    useOnCd && "--use-on-cd",
+    logLevel && `--log-level=${logLevel}`,
+    args && args.join(" "),
+  ]
+    .filter(Boolean)
+    .join(" ")
+}
+
+export const cmdEnv = {
+  bash: define<HasEnv>({
+    env: (envConfig) => `eval "$(${stringify(envConfig)})"`,
+  }),
+  fish: define<HasEnv>({
+    env: (envConfig) => `${stringify(envConfig)} | source`,
+  }),
+  powershell: define<HasEnv>({
+    env: (envConfig) =>
+      `${stringify(envConfig)} | Out-String | Invoke-Expression`,
+  }),
+  wincmd: define<HasEnv>({
+    env: (envConfig) =>
+      `FOR /f "tokens=*" %i IN ('${stringify(envConfig)}') DO CALL %i`,
+  }),
+}

e2e/shellcode/shells/expect-command-output.ts

@@ -0,0 +1,52 @@
+import { dedent } from "ts-dedent"
+import { define, ScriptLine } from "./types.js"
+
+export type HasExpectCommandOutput = {
+  hasCommandOutput(
+    script: ScriptLine,
+    output: string,
+    message: string
+  ): ScriptLine
+}
+
+export const cmdExpectCommandOutput = {
+  bash: define<HasExpectCommandOutput>({
+    hasCommandOutput(script, output, message) {
+      return dedent`
+        if [ "$(${script})" != "${output}" ]; then
+          echo "Expected ${message} to be ${output}. Got $(${script})"
+          exit 1
+        fi
+      `
+    },
+  }),
+  fish: define<HasExpectCommandOutput>({
+    hasCommandOutput(script, output, message) {
+      return dedent`
+        set ____test____ (${script})
+        if test "$____test____" != "${output}"
+          echo "Expected ${message} to be ${output}. Got $____test____"
+          exit 1
+        end
+      `
+    },
+  }),
+  powershell: define<HasExpectCommandOutput>({
+    hasCommandOutput(script, output, message) {
+      return dedent`
+        if ( "$(${script})" -ne "${output}" ) { echo "Expected ${message} to be ${output}. Got $(${script})"; exit 1 }
+      `
+    },
+  }),
+  wincmd: define<HasExpectCommandOutput>({
+    hasCommandOutput(script, output, message) {
+      return dedent`
+        ${script} | findstr ${output}
+        if %errorlevel% neq 0 (
+          echo Expected ${message} to be ${output}
+          exit 1
+        )
+      `
+    },
+  }),
+}

e2e/shellcode/shells/output-contains.ts

@@ -0,0 +1,24 @@
+import { define, ScriptLine } from "./types.js"
+
+export type HasOutputContains = {
+  scriptOutputContains(script: ScriptLine, substring: string): ScriptLine
+}
+
+export const cmdHasOutputContains = {
+  bash: define<HasOutputContains>({
+    scriptOutputContains: (script, substring) => {
+      return `(${script}) | grep ${substring} || (echo "Expected output to contain ${substring}" && exit 1)`
+    },
+  }),
+  fish: define<HasOutputContains>({
+    scriptOutputContains: (script, substring) => {
+      return `begin; ${script}; end | grep ${substring}; or echo "Expected output to contain ${substring}" && exit 1`
+    },
+  }),
+  powershell: define<HasOutputContains>({
+    scriptOutputContains: (script, substring) => {
+      const inner: string = `${script} | Select-String ${substring}`
+      return `$($__out__ = $(${inner}); if ($__out__ -eq $null) { exit 1 } else { $__out__ })`
+    },
+  }),
+}

e2e/shellcode/shells/redirect-output.ts

@@ -0,0 +1,16 @@
+import { ScriptLine, define } from "./types.js"
+
+type RedirectOutputOpts = { output: string }
+export type HasRedirectOutput = {
+  redirectOutput(childCommand: ScriptLine, opts: RedirectOutputOpts): string
+}
+
+export const redirectOutput = {
+  bash: define<HasRedirectOutput>({
+    redirectOutput: (childCommand, opts) => `${childCommand} > ${opts.output}`,
+  }),
+  powershell: define<HasRedirectOutput>({
+    redirectOutput: (childCommand, opts) =>
+      `${childCommand} | Out-File ${opts.output} -Encoding UTF8`,
+  }),
+}

e2e/shellcode/shells/sub-shell.ts

@@ -0,0 +1,20 @@
+import { ScriptLine, define } from "./types.js"
+import quote from "shell-escape"
+
+type HasInSubShell = { inSubShell: (script: ScriptLine) => ScriptLine }
+
+export const cmdInSubShell = {
+  bash: define<HasInSubShell>({
+    inSubShell: (script) => `echo ${quote([script])} | bash`,
+  }),
+  zsh: define<HasInSubShell>({
+    inSubShell: (script) => `echo ${quote([script])} | zsh`,
+  }),
+  fish: define<HasInSubShell>({
+    inSubShell: (script) => `fish -c ${quote([script])}`,
+  }),
+  powershell: define<HasInSubShell>({
+    inSubShell: (script) =>
+      `echo '${script.replace(/'/g, "\\'")}' | pwsh -NoProfile`,
+  }),
+}

e2e/shellcode/shells/types.ts

@@ -0,0 +1,15 @@
+export type Shell = {
+  escapeText(str: string): string
+  binaryName(): string
+  currentlySupported(): boolean
+  name(): string
+  launchArgs(): string[]
+  dieOnErrors?(): string
+  forceFile?: true | string
+}
+
+export type ScriptLine = string
+
+export function define<S>(s: S): S {
+  return s
+}

e2e/shellcode/test-bin-dir.ts

@@ -0,0 +1,9 @@
+import { mkdirSync } from "node:fs"
+import path from "node:path"
+import testTmpDir from "./test-tmp-dir.js"
+
+export default function testBinDir() {
+  const dir = path.join(testTmpDir(), "bin")
+  mkdirSync(dir, { recursive: true })
+  return dir
+}

e2e/shellcode/test-cwd.ts

@@ -0,0 +1,9 @@
+import { mkdirSync } from "node:fs"
+import path from "node:path"
+import testTmpDir from "./test-tmp-dir.js"
+
+export default function testCwd() {
+  const dir = path.join(testTmpDir(), "cwd")
+  mkdirSync(dir, { recursive: true })
+  return dir
+}

e2e/shellcode/test-node-version.ts

@@ -0,0 +1,10 @@
+import { HasCall } from "./shells/cmdCall.js"
+import { ScriptLine } from "./shells/types.js"
+import { HasExpectCommandOutput } from "./shells/expect-command-output.js"
+
+export default function testNodeVersion<
+  S extends HasCall & HasExpectCommandOutput
+>(shell: S, version: string): ScriptLine {
+  const nodeVersion = shell.call("node", ["--version"])
+  return shell.hasCommandOutput(nodeVersion, version, "node version")
+}

e2e/shellcode/test-tmp-dir.ts

@@ -0,0 +1,15 @@
+import { mkdirSync, rmSync } from "node:fs"
+import { tmpdir } from "node:os"
+import { join } from "node:path"
+
+export default function testTmpDir(): string {
+  const testName = (expect.getState().currentTestName ?? "unknown")
+    .toLowerCase()
+    .replace(/[^a-z0-9]/gi, "_")
+    .replace(/_+/g, "_")
+  const tmpDir = join(tmpdir(), `shellcode/${testName}`)
+  mkdirSync(tmpDir, { recursive: true })
+  rmSync(join(tmpDir, "fnm/aliases"), { recursive: true, force: true })
+
+  return tmpDir
+}

e2e/shims.test.ts

@@ -0,0 +1,49 @@
+import { readFile } from "node:fs/promises"
+import { join } from "node:path"
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, WinCmd, Zsh } from "./shellcode/shells.js"
+import testCwd from "./shellcode/test-cwd.js"
+import describe from "./describe.js"
+import testNodeVersion from "./shellcode/test-node-version.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell, WinCmd]) {
+  describe(shell, () => {
+    test(`outputs json`, async () => {
+      const filename = `file.json`
+      await script(shell)
+        .then(
+          shell.redirectOutput(
+            shell.call("fnm", ["env", "--json", "--with-shims"]),
+            {
+              output: filename,
+            }
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+
+      if (shell.currentlySupported()) {
+        const file = await readFile(join(testCwd(), filename), "utf8")
+        expect(JSON.parse(file)).toEqual({
+          FNM_ARCH: expect.any(String),
+          FNM_DIR: expect.any(String),
+          FNM_LOGLEVEL: "info",
+          FNM_MULTISHELL_PATH: expect.any(String),
+          FNM_NODE_DIST_MIRROR: expect.any(String),
+          FNM_VERSION_FILE_STRATEGY: "local",
+          FNM_VERSION_SWITCH_STRATEGY: "shims",
+        })
+      }
+    })
+
+    test(`runs Node through a shim`, async () => {
+      await script(shell)
+        .then(shell.env({ args: ["--with-shims"] }))
+        .then(shell.call("fnm", ["install", "12.0.0"]))
+        .then(shell.call("fnm", ["use", "12.0.0"]))
+        .then(testNodeVersion(shell, "v12.0.0"))
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

e2e/system-node.test.ts

@@ -0,0 +1,38 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, WinCmd, Zsh } from "./shellcode/shells.js"
+import fs from "node:fs/promises"
+import path from "node:path"
+import describe from "./describe.js"
+import testNodeVersion from "./shellcode/test-node-version.js"
+import testBinDir from "./shellcode/test-bin-dir.js"
+
+for (const shell of [Bash, Fish, PowerShell, WinCmd, Zsh]) {
+  describe(shell, () => {
+    // latest bash breaks this as it seems. gotta find a solution.
+    const t = process.platform === "darwin" && shell === Bash ? test.skip : test
+
+    t(`switches to system node`, async () => {
+      const customNode = path.join(testBinDir(), "node")
+
+      if (
+        process.platform === "win32" &&
+        [WinCmd, PowerShell].includes(shell)
+      ) {
+        await fs.writeFile(customNode + ".cmd", "@echo custom")
+      } else {
+        await fs.writeFile(customNode, `#!/bin/bash\n\necho "custom"\n`)
+        // set executable
+        await fs.chmod(customNode, 0o766)
+      }
+
+      await script(shell)
+        .then(shell.env({}))
+        .then(shell.call("fnm", ["install", "v10.10.0"]))
+        .then(shell.call("fnm", ["use", "v10"]))
+        .then(testNodeVersion(shell, "v10.10.0"))
+        .then(shell.call("fnm", ["use", "system"]))
+        .then(testNodeVersion(shell, "custom"))
+        .execute(shell)
+    })
+  })
+}

e2e/uninstall.test.ts

@@ -0,0 +1,29 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, Zsh } from "./shellcode/shells.js"
+import describe from "./describe.js"
+
+for (const shell of [Bash, Zsh, Fish, PowerShell]) {
+  describe(shell, () => {
+    test(`uninstalls a version`, async () => {
+      await script(shell)
+        .then(shell.call("fnm", ["install", "12.0.0"]))
+        .then(shell.call("fnm", ["alias", "12.0.0", "hello"]))
+        .then(
+          shell.scriptOutputContains(
+            shell.scriptOutputContains(shell.call("fnm", ["ls"]), "v12.0.0"),
+            "hello"
+          )
+        )
+        .then(shell.call("fnm", ["uninstall", "hello"]))
+        .then(
+          shell.hasCommandOutput(
+            shell.call("fnm", ["ls"]),
+            "* system",
+            "fnm ls"
+          )
+        )
+        .takeSnapshot(shell)
+        .execute(shell)
+    })
+  })
+}

jest.config.cjs

@@ -0,0 +1,22 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: "ts-jest/presets/default-esm",
+  testEnvironment: "node",
+  testTimeout: 120000,
+  extensionsToTreatAsEsm: [".ts"],
+  moduleNameMapper: {
+    "^(\\.{1,2}/.*)\\.js$": "$1",
+    "#ansi-styles": "ansi-styles/index.js",
+    "#supports-color": "supports-color/index.js",
+  },
+  transform: {
+    // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest`
+    // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest`
+    "^.+\\.tsx?$": [
+      "ts-jest",
+      {
+        useESM: true,
+      },
+    ],
+  },
+}

package.json

@@ -1,13 +1,15 @@
 {
   "name": "fnm",
-  "version": "0.0.0",
+  "version": "1.31.1",
   "private": true,
   "repository": "git@github.com:Schniz/fnm.git",
   "author": "Gal Schlezinger <gal@spitfire.co.il>",
+  "type": "module",
+  "packageManager": "pnpm@7.16.1",
   "license": "GPLv3",
   "scripts": {
-    "changelog": "./.ci/generate-changelog.sh",
+    "test": "cross-env NODE_OPTIONS='--experimental-vm-modules' jest",
-    "version:prepare": "./.ci/prepare-version.js",
+    "version:prepare": "changeset version && ./.ci/prepare-version.js",
     "generate-command-docs": "./.ci/print-command-docs.js"
   },
   "changelog": {
@@ -20,10 +22,27 @@
     }
   },
   "devDependencies": {
-    "cmd-ts": "0.8.0",
+    "@changesets/cli": "2.25.0",
-    "execa": "5.1.1",
+    "@svitejs/changesets-changelog-github-compact": "0.1.1",
+    "@types/jest": "^29.2.3",
+    "@types/node": "^18.11.9",
+    "@types/shell-escape": "^0.2.1",
+    "chalk": "^5.1.2",
+    "cmd-ts": "0.11.0",
+    "cross-env": "^7.0.3",
+    "execa": "6.1.0",
+    "jest": "^29.3.1",
     "lerna-changelog": "2.2.0",
-    "prettier": "2.5.1",
+    "prettier": "2.7.1",
-    "toml": "3.0.0"
+    "pv": "1.0.1",
+    "shell-escape": "^0.2.0",
+    "svg-term-cli": "2.1.1",
+    "toml": "3.0.0",
+    "ts-dedent": "^2.2.0",
+    "ts-jest": "^29.0.3",
+    "typescript": "^4.8.4"
+  },
+  "prettier": {
+    "semi": false
   }
 }

renovate.json

@@ -1,4 +1,6 @@
 {
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:base"],
   "labels": ["PR: Dependency Update"],
   "packageRules": [
     {
@@ -7,9 +9,29 @@
         "groupName": "all non-major dependencies",
         "groupSlug": "all-minor-patch"
       }
+    },
+    {
+      "matchPackagePatterns": ["serde", "serde_json"],
+      "groupName": "serde",
+      "groupSlug": "serde"
+    },
+    {
+      "matchPackagePatterns": ["clap", "clap_*"],
+      "groupName": "clap-rs",
+      "groupSlug": "clap-rs"
+    },
+    {
+      "matchDepTypes": ["devDependencies", "dev-dependencies"],
+      "matchPackagePatterns": ["*"],
+      "automerge": true,
+      "groupName": "all dev dependencies",
+      "groupSlug": "all-dev-dependencies"
+    },
+    {
+      "matchPackagePatterns": ["uraimo/run-on-arch-action"],
+      "matchManagers": ["github-actions"],
+      "allowedVersions": "2.1.2"
     }
   ],
-  "extends": [
+  "lockFileMaintenance": { "enabled": true }
-    "config:base"
-  ]
 }

site/package.json

@@ -6,10 +6,5 @@
   "license": "MIT",
   "scripts": {
     "build": "rm -rf public; mkdir public; cp ../.ci/install.sh ./public/install.txt"
-  },
-  "devDependencies": {
-    "@vercel/node": "1.12.1",
-    "typescript": "4.5.4",
-    "vercel": "23.1.2"
   }
 }

site/tsconfig.json

@@ -1,10 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "es5",
-    "module": "commonjs",
-    "strict": true,
-    "esModuleInterop": true,
-    "skipLibCheck": true,
-    "forceConsistentCasingInFileNames": true
-  }
-}

site/vercel.json

@@ -1,17 +1,19 @@
 {
+  "$schema": "https://openapi.vercel.sh/vercel.json",
+  "github": {
+    "silent": true
+  },
   "redirects": [
     { "source": "/", "destination": "https://github.com/Schniz/fnm" }
   ],
-  "rewrites": [
+  "rewrites": [{ "source": "/install", "destination": "/install.txt" }],
-    { "source": "/install", "destination": "/install.txt" }
-  ],
   "headers": [
     {
       "source": "/install",
-      "headers" : [
+      "headers": [
         {
-          "key" : "Cache-Control",
+          "key": "Cache-Control",
-          "value" : "public, max-age=3600"
+          "value": "public, max-age=3600"
         }
       ]
     }

site/yarn.lock

@@ -1,677 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
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-  version "0.14.0"
-  resolved "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz#9fb3a3cf3132328151f353de4632e01e52102bea"
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-
-"@szmarczak/http-timer@^1.1.2":
-  version "1.1.2"
-  resolved "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz#b1665e2c461a2cd92f4c1bbf50d5454de0d4b421"
-  integrity sha512-XIB2XbzHTN6ieIjfIMV9hlVcfPU26s2vafYWQcZHWXHOxiaRZYEDKEwdl129Zyg50+foYV2jCgtrqSA6qNuNSA==
-  dependencies:
-    defer-to-connect "^1.0.1"
-
-"@types/color-name@^1.1.1":
-  version "1.1.1"
-  resolved "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"
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-
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-  version "14.11.2"
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-
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-
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-  version "1.2.3"
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-    ts-node "8.9.1"
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-  version "1.2.7"
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src/arch.rs

@@ -11,6 +11,20 @@ pub enum Arch {
     S390x,
 }
 
+impl Arch {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            Arch::X86 => "x86",
+            Arch::X64 => "x64",
+            Arch::Arm64 => "arm64",
+            Arch::Armv7l => "armv7l",
+            Arch::Ppc64le => "ppc64le",
+            Arch::Ppc64 => "ppc64",
+            Arch::S390x => "s390x",
+        }
+    }
+}
+
 #[cfg(unix)]
 /// handle common case: Apple Silicon / Node < 16
 pub fn get_safe_arch<'a>(arch: &'a Arch, version: &Version) -> &'a Arch {
@@ -55,17 +69,7 @@ impl std::str::FromStr for Arch {
 
 impl std::fmt::Display for Arch {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let arch_str = match self {
+        write!(f, "{}", self.as_str())
-            Arch::X86 => String::from("x86"),
-            Arch::X64 => String::from("x64"),
-            Arch::Arm64 => String::from("arm64"),
-            Arch::Armv7l => String::from("armv7l"),
-            Arch::Ppc64le => String::from("ppc64le"),
-            Arch::Ppc64 => String::from("ppc64"),
-            Arch::S390x => String::from("s390x"),
-        };
-
-        write!(f, "{}", arch_str)
     }
 }
 

src/archive/zip.rs

@@ -42,7 +42,7 @@ impl<R: Read> Extract for Zip<R> {
                 }
             }
 
-            if (&*file.name()).ends_with('/') {
+            if file.name().ends_with('/') {
                 debug!(
                     "File {} extracted to \"{}\"",
                     i,
@@ -58,7 +58,7 @@ impl<R: Read> Extract for Zip<R> {
                 );
                 if let Some(p) = outpath.parent() {
                     if !p.exists() {
-                        fs::create_dir_all(&p)?;
+                        fs::create_dir_all(p)?;
                     }
                 }
                 let mut outfile = fs::File::create(&outpath)?;

src/choose_version_for_user_input.rs

@@ -6,8 +6,8 @@ use crate::user_version::UserVersion;
 use crate::version::Version;
 use colored::Colorize;
 use log::info;
-use snafu::{ensure, ResultExt, Snafu};
 use std::path::{Path, PathBuf};
+use thiserror::Error;
 
 #[derive(Debug)]
 pub struct ApplicableVersion {
@@ -29,8 +29,8 @@ pub fn choose_version_for_user_input<'a>(
     requested_version: &'a UserVersion,
     config: &'a FnmConfig,
 ) -> Result<Option<ApplicableVersion>, Error> {
-    let all_versions =
+    let all_versions = installed_versions::list(config.installations_dir())
-        installed_versions::list(config.installations_dir()).context(VersionListing)?;
+        .map_err(|source| Error::VersionListing { source })?;
 
     let result = if let UserVersion::Full(Version::Bypassed) = requested_version {
         info!(
@@ -54,18 +54,16 @@ pub fn choose_version_for_user_input<'a>(
                 path: alias_path,
                 version: Version::Bypassed,
             })
-        } else {
+        } else if alias_path.exists() {
-            ensure!(
-                alias_path.exists(),
-                CantFindVersion {
-                    requested_version: requested_version.clone()
-                }
-            );
             info!("Using Node for alias {}", alias_name.cyan());
             Some(ApplicableVersion {
                 path: alias_path,
                 version: Version::Alias(alias_name),
             })
+        } else {
+            return Err(Error::CantFindVersion {
+                requested_version: requested_version.clone(),
+            });
         }
     } else {
         let current_version = requested_version.to_version(&all_versions, config);
@@ -86,10 +84,10 @@ pub fn choose_version_for_user_input<'a>(
     Ok(result)
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't find requested version: {}", requested_version))]
+    #[error("Can't find requested version: {}", requested_version)]
     CantFindVersion { requested_version: UserVersion },
-    #[snafu(display("Can't list local installed versions: {}", source))]
+    #[error("Can't list local installed versions: {}", source)]
     VersionListing { source: installed_versions::Error },
 }

src/cli.rs

@@ -1,24 +1,24 @@
 use crate::commands;
 use crate::commands::command::Command;
 use crate::config::FnmConfig;
-use structopt::StructOpt;
+use clap::Parser;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub enum SubCommand {
     /// List all remote Node.js versions
-    #[structopt(name = "list-remote", visible_aliases = &["ls-remote"])]
+    #[clap(name = "list-remote", bin_name = "list-remote", visible_aliases = &["ls-remote"])]
     LsRemote(commands::ls_remote::LsRemote),
 
     /// List all locally installed Node.js versions
-    #[structopt(name = "list", visible_aliases = &["ls"])]
+    #[clap(name = "list", bin_name = "list", visible_aliases = &["ls"])]
     LsLocal(commands::ls_local::LsLocal),
 
     /// Install a new Node.js version
-    #[structopt(name = "install")]
+    #[clap(name = "install", bin_name = "install")]
     Install(commands::install::Install),
 
     /// Change Node.js version
-    #[structopt(name = "use")]
+    #[clap(name = "use", bin_name = "use")]
     Use(commands::r#use::Use),
 
     /// Print and set up required environment variables for fnm
@@ -29,29 +29,29 @@ pub enum SubCommand {
     /// Each shell has its own syntax of evaluating a dynamic expression.
     /// For example, evaluating fnm on Bash and Zsh would look like `eval "$(fnm env)"`.
     /// In Fish, evaluating would look like `fnm env | source`
-    #[structopt(name = "env")]
+    #[clap(name = "env", bin_name = "env")]
     Env(commands::env::Env),
 
     /// Print shell completions to stdout
-    #[structopt(name = "completions")]
+    #[clap(name = "completions", bin_name = "completions")]
     Completions(commands::completions::Completions),
 
     /// Alias a version to a common name
-    #[structopt(name = "alias")]
+    #[clap(name = "alias", bin_name = "alias")]
     Alias(commands::alias::Alias),
 
     /// Remove an alias definition
-    #[structopt(name = "unalias")]
+    #[clap(name = "unalias", bin_name = "unalias")]
     Unalias(commands::unalias::Unalias),
 
     /// Set a version as the default version
     ///
     /// This is a shorthand for `fnm alias VERSION default`
-    #[structopt(name = "default")]
+    #[clap(name = "default", bin_name = "default")]
     Default(commands::default::Default),
 
     /// Print the current Node.js version
-    #[structopt(name = "current")]
+    #[clap(name = "current", bin_name = "current")]
     Current(commands::current::Current),
 
     /// Run a command within fnm context
@@ -60,14 +60,14 @@ pub enum SubCommand {
     /// --------
     /// fnm exec --using=v12.0.0 node --version
     /// => v12.0.0
-    #[structopt(name = "exec", verbatim_doc_comment)]
+    #[clap(name = "exec", bin_name = "exec", verbatim_doc_comment)]
     Exec(commands::exec::Exec),
 
     /// Uninstall a Node.js version
     ///
     /// > Warning: when providing an alias, it will remove the Node version the alias
     /// is pointing to, along with the other aliases that point to the same version.
-    #[structopt(name = "uninstall")]
+    #[clap(name = "uninstall", bin_name = "uninstall")]
     Uninstall(commands::uninstall::Uninstall),
 }
 
@@ -91,15 +91,15 @@ impl SubCommand {
 }
 
 /// A fast and simple Node.js manager.
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
-#[structopt(name = "fnm")]
+#[clap(name = "fnm", version = env!("CARGO_PKG_VERSION"), bin_name = "fnm")]
 pub struct Cli {
-    #[structopt(flatten)]
+    #[clap(flatten)]
     pub config: FnmConfig,
-    #[structopt(subcommand)]
+    #[clap(subcommand)]
     pub subcmd: SubCommand,
 }
 
 pub fn parse() -> Cli {
-    Cli::from_args()
+    Cli::parse()
 }

src/commands/alias.rs

@@ -4,12 +4,10 @@ use crate::choose_version_for_user_input::{
     choose_version_for_user_input, Error as ApplicableVersionError,
 };
 use crate::config::FnmConfig;
-use crate::installed_versions;
 use crate::user_version::UserVersion;
-use snafu::{OptionExt, ResultExt, Snafu};
+use thiserror::Error;
-use structopt::StructOpt;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct Alias {
     pub(crate) to_version: UserVersion,
     pub(crate) name: String,
@@ -20,26 +18,24 @@ impl Command for Alias {
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
         let applicable_version = choose_version_for_user_input(&self.to_version, config)
-            .context(CantUnderstandVersion)?
+            .map_err(|source| Error::CantUnderstandVersion { source })?
-            .context(VersionNotFound {
+            .ok_or(Error::VersionNotFound {
                 version: self.to_version,
             })?;
 
         create_alias(config, &self.name, applicable_version.version())
-            .context(CantCreateSymlink)?;
+            .map_err(|source| Error::CantCreateSymlink { source })?;
 
         Ok(())
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't create symlink for alias: {}", source))]
+    #[error("Can't create symlink for alias: {}", source)]
     CantCreateSymlink { source: std::io::Error },
-    #[snafu(display("Can't list local installed versions: {}", source))]
+    #[error("Version {} not found locally", version)]
-    VersionListingError { source: installed_versions::Error },
-    #[snafu(display("Version {} not found locally", version))]
     VersionNotFound { version: UserVersion },
-    #[snafu(display("{}", source))]
+    #[error(transparent)]
     CantUnderstandVersion { source: ApplicableVersionError },
 }

src/commands/completions.rs

@@ -2,14 +2,14 @@ use super::command::Command;
 use crate::cli::Cli;
 use crate::config::FnmConfig;
 use crate::shell::{infer_shell, AVAILABLE_SHELLS};
-use snafu::{OptionExt, Snafu};
+use clap::{IntoApp, Parser};
-use structopt::clap::Shell;
+use clap_complete::{Generator, Shell};
-use structopt::StructOpt;
+use thiserror::Error;
 
-#[derive(StructOpt, Debug)]
+#[derive(Parser, Debug)]
 pub struct Completions {
     /// The shell syntax to use. Infers when missing.
-    #[structopt(long, possible_values = &Shell::variants())]
+    #[clap(long)]
     shell: Option<Shell>,
 }
 
@@ -21,21 +21,22 @@ impl Command for Completions {
         let shell = self
             .shell
             .or_else(|| infer_shell().map(Into::into))
-            .context(CantInferShell)?;
+            .ok_or(Error::CantInferShell)?;
-        Cli::clap().gen_completions_to(env!("CARGO_PKG_NAME"), shell, &mut stdio);
+        let app = Cli::command();
+        shell.generate(&app, &mut stdio);
         Ok(())
     }
 }
 
-#[derive(Snafu, Debug)]
+#[derive(Error, Debug)]
 pub enum Error {
-    #[snafu(display(
+    #[error(
         "{}\n{}\n{}\n{}",
         "Can't infer shell!",
         "fnm can't infer your shell based on the process tree.",
         "Maybe it is unsupported? we support the following shells:",
         shells_as_string()
-    ))]
+    )]
     CantInferShell,
 }
 

src/commands/current.rs

@@ -1,9 +1,8 @@
 use super::command::Command;
 use crate::config::FnmConfig;
 use crate::current_version::{current_version, Error};
-use structopt::StructOpt;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct Current {}
 
 impl Command for Current {

src/commands/default.rs

@@ -2,9 +2,8 @@ use super::alias::Alias;
 use super::command::Command;
 use crate::config::FnmConfig;
 use crate::user_version::UserVersion;
-use structopt::StructOpt;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct Default {
     version: UserVersion,
 }

src/commands/env.rs

@@ -1,25 +1,30 @@
 use super::command::Command;
 use crate::config::FnmConfig;
+use crate::directories;
 use crate::fs::symlink_dir;
 use crate::path_ext::PathExt;
 use crate::shell::{infer_shell, Shell, AVAILABLE_SHELLS};
+use crate::version_switch_strategy::VersionSwitchStrategy;
 use crate::{outln, shims};
 use colored::Colorize;
-use snafu::{OptionExt, ResultExt, Snafu};
+use std::collections::HashMap;
 use std::fmt::Debug;
-use structopt::StructOpt;
+use thiserror::Error;
 
-#[derive(StructOpt, Debug, Default)]
+#[derive(clap::Parser, Debug, Default)]
 pub struct Env {
     /// The shell syntax to use. Infers when missing.
-    #[structopt(long)]
+    #[clap(long)]
-    #[structopt(possible_values = AVAILABLE_SHELLS)]
+    #[clap(possible_values = AVAILABLE_SHELLS)]
     shell: Option<Box<dyn Shell>>,
+    /// Print JSON instead of shell commands.
+    #[clap(long, conflicts_with = "shell")]
+    json: bool,
     /// Deprecated. This is the default now.
-    #[structopt(long, hidden = true)]
+    #[clap(long, hide = true)]
     multi: bool,
     /// Print the script to change Node versions every directory change
-    #[structopt(long)]
+    #[clap(long)]
     use_on_cd: bool,
 
     /// Adds `node` shims to your PATH environment variable
@@ -37,18 +42,18 @@ fn generate_symlink_path() -> String {
     )
 }
 
-fn make_symlink(config: &FnmConfig) -> std::path::PathBuf {
+fn make_symlink(config: &FnmConfig) -> Result<std::path::PathBuf, Error> {
-    let base_dir = std::env::temp_dir()
+    let base_dir = directories::multishell_storage().ensure_exists_silently();
-        .join("fnm_multishells")
-        .ensure_exists_silently();
     let mut temp_dir = base_dir.join(generate_symlink_path());
 
     while temp_dir.exists() {
         temp_dir = base_dir.join(generate_symlink_path());
     }
 
-    symlink_dir(config.default_version_dir(), &temp_dir).expect("Can't create symlink!");
+    match symlink_dir(config.default_version_dir(), &temp_dir) {
-    temp_dir
+        Ok(_) => Ok(temp_dir),
+        Err(source) => Err(Error::CantCreateSymlink { source, temp_dir }),
+    }
 }
 
 impl Command for Env {
@@ -65,58 +70,91 @@ impl Command for Env {
             );
         }
 
-        let shell: Box<dyn Shell> = self.shell.or_else(&infer_shell).context(CantInferShell)?;
+        let multishell_path = make_symlink(config)?;
-        let multishell_path = make_symlink(config);
         let binary_path = if self.with_shims {
-            shims::store_shim(config).context(CantCreateShims)?
+            shims::store_shim(config).map_err(|source| Error::CantCreateShims { source })?
         } else if cfg!(windows) {
             multishell_path.clone()
         } else {
             multishell_path.join("bin")
         };
-        println!("{}", shell.path(&binary_path));
+
-        println!(
+        let fnm_dir = config.base_dir_with_default();
-            "{}",
+
-            shell.set_env_var("FNM_MULTISHELL_PATH", multishell_path.to_str().unwrap())
+        let env_vars = HashMap::from([
-        );
+            ("FNM_MULTISHELL_PATH", multishell_path.to_str().unwrap()),
-        println!(
+            (
-            "{}",
+                "FNM_VERSION_FILE_STRATEGY",
-            shell.set_env_var("FNM_DIR", config.base_dir_with_default().to_str().unwrap())
+                config.version_file_strategy().as_str(),
-        );
+            ),
-        println!(
+            ("FNM_DIR", fnm_dir.to_str().unwrap()),
-            "{}",
+            ("FNM_LOGLEVEL", config.log_level().as_str()),
-            shell.set_env_var("FNM_LOGLEVEL", config.log_level().clone().into())
+            ("FNM_NODE_DIST_MIRROR", config.node_dist_mirror.as_str()),
-        );
+            ("FNM_ARCH", config.arch.as_str()),
-        println!(
+            (
-            "{}",
+                "FNM_VERSION_SWITCH_STRATEGY",
-            shell.set_env_var("FNM_NODE_DIST_MIRROR", config.node_dist_mirror.as_str())
+                if self.with_shims {
-        );
+                    VersionSwitchStrategy::Shims
-        println!(
+                } else {
-            "{}",
+                    VersionSwitchStrategy::PathSymlink
-            shell.set_env_var("FNM_ARCH", &config.arch.to_string())
+                }
-        );
+                .as_str(),
+            ),
+        ]);
+
+        if self.json {
+            println!("{}", serde_json::to_string(&env_vars).unwrap());
+            return Ok(());
+        }
+
+        let shell: Box<dyn Shell> = self
+            .shell
+            .or_else(infer_shell)
+            .ok_or(Error::CantInferShell)?;
+
+        println!("{}", shell.path(&binary_path)?);
+
+        for (name, value) in &env_vars {
+            println!("{}", shell.set_env_var(name, value));
+        }
+
         if self.use_on_cd {
-            println!("{}", shell.use_on_cd(config));
+            println!("{}", shell.use_on_cd(config)?);
         }
         if let Some(v) = shell.rehash() {
             println!("{}", v);
         }
+
         Ok(())
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display(
+    #[error(
         "{}\n{}\n{}\n{}",
         "Can't infer shell!",
         "fnm can't infer your shell based on the process tree.",
         "Maybe it is unsupported? we support the following shells:",
         shells_as_string()
-    ))]
+    )]
     CantInferShell,
-    #[snafu(display("Can't create Node.js shims: {}", source))]
+    #[error("Can't create Node.js shims: {}", source)]
-    CantCreateShims { source: std::io::Error },
+    CantCreateShims {
+        #[source]
+        source: std::io::Error,
+    },
+    #[error("Can't create the symlink for multishells at {temp_dir:?}. Maybe there are some issues with permissions for the directory? {source}")]
+    CantCreateSymlink {
+        #[source]
+        source: std::io::Error,
+        temp_dir: std::path::PathBuf,
+    },
+    #[error(transparent)]
+    ShellError {
+        #[from]
+        source: anyhow::Error,
+    },
 }
 
 fn shells_as_string() -> String {

src/commands/exec.rs

@@ -9,20 +9,19 @@ use crate::user_version::UserVersion;
 use crate::user_version_reader::UserVersionReader;
 use colored::Colorize;
 use log::debug;
-use snafu::{OptionExt, ResultExt, Snafu};
 use std::process::{Command, Stdio};
-use structopt::StructOpt;
+use thiserror::Error;
 
-#[derive(Debug, StructOpt)]
+#[derive(Debug, clap::Parser)]
-#[structopt(setting = structopt::clap::AppSettings::TrailingVarArg)]
+#[clap(trailing_var_arg = true)]
 pub struct Exec {
     /// Either an explicit version, or a filename with the version written in it
-    #[structopt(long = "using")]
+    #[clap(long = "using")]
     version: Option<UserVersionReader>,
     /// Deprecated. This is the default now.
-    #[structopt(long = "using-file", hidden = true)]
+    #[clap(long = "using-file", hide = true)]
     using_file: bool,
-    #[structopt(long = "using-current", hidden = true, conflicts_with = "using")]
+    #[structopt(long = "using-current", hidden = true, conflicts_with = "version")]
     using_current: bool,
     /// The command to run
     arguments: Vec<String>,
@@ -42,12 +41,15 @@ impl Cmd for Exec {
             );
         }
 
-        let (binary, arguments) = self.arguments.split_first().context(NoBinaryProvided)?;
+        let (binary, arguments) = self
+            .arguments
+            .split_first()
+            .ok_or(Error::NoBinaryProvided)?;
 
         let version = if self.using_current {
             let version = current_version(config)
-                .context(CantGetCurrentVersion)?
+                .map_err(|source| Error::CantGetCurrentVersion { source })?
-                .context(NoCurrentVersion)?;
+                .ok_or(Error::NoCurrentVersion)?;
             UserVersion::Full(version)
         } else {
             self.version
@@ -56,13 +58,13 @@ impl Cmd for Exec {
                     let current_dir = std::env::current_dir().unwrap();
                     UserVersionReader::Path(current_dir)
                 })
-                .into_user_version()
+                .into_user_version(config)
-                .context(CantInferVersion)?
+                .ok_or(Error::CantInferVersion)?
         };
 
         let applicable_version = choose_version_for_user_input(&version, config)
-            .context(ApplicableVersionError)?
+            .map_err(|source| Error::ApplicableVersionError { source })?
-            .context(VersionNotFound { version })?;
+            .ok_or(Error::VersionNotFound { version })?;
 
         #[cfg(windows)]
         let bin_path = applicable_version.path().to_path_buf();
@@ -73,13 +75,14 @@ impl Cmd for Exec {
         debug!("Using Node.js from {}", bin_path.display());
 
         let path_env = {
-            let paths_env = std::env::var_os("PATH").context(CantReadPathVariable)?;
+            let paths_env = std::env::var_os("PATH").ok_or(Error::CantReadPathVariable)?;
             let mut paths: Vec<_> = std::env::split_paths(&paths_env).collect();
             paths.insert(0, bin_path);
-            std::env::join_paths(paths).context(CantAddPathToEnvironment)?
+            std::env::join_paths(paths)
+                .map_err(|source| Error::CantAddPathToEnvironment { source })?
         };
 
-        let exit_status = Command::new(&binary)
+        let exit_status = Command::new(binary)
             .args(arguments)
             .stdin(Stdio::inherit())
             .stdout(Stdio::inherit())
@@ -90,40 +93,35 @@ impl Cmd for Exec {
             .wait()
             .expect("Failed to grab exit code");
 
-        let code = exit_status.code().context(CantReadProcessExitCode)?;
+        let code = exit_status.code().ok_or(Error::CantReadProcessExitCode)?;
         std::process::exit(code);
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't read path environment variable"))]
+    #[error("Can't read path environment variable")]
     CantReadPathVariable,
-    #[snafu(display("Can't add path to environment variable: {}", source))]
+    #[error("Can't add path to environment variable: {}", source)]
-    CantAddPathToEnvironment {
+    CantAddPathToEnvironment { source: std::env::JoinPathsError },
-        source: std::env::JoinPathsError,
+    #[error("Can't find version in dotfiles. Please provide a version manually to the command.")]
-    },
-    #[snafu(display(
-        "Can't find version in dotfiles. Please provide a version manually to the command."
-    ))]
     CantInferVersion,
-    #[snafu(display("Requested version {} is not currently installed", version))]
+    #[error("Requested version {} is not currently installed", version)]
-    VersionNotFound {
+    VersionNotFound { version: UserVersion },
-        version: UserVersion,
+    #[error(transparent)]
-    },
     ApplicableVersionError {
+        #[from]
         source: UserInputError,
     },
-    #[snafu(display(
+    #[error("Can't read exit code from process.\nMaybe the process was killed using a signal?")]
-        "Can't read exit code from process.\nMaybe the process was killed using a signal?"
-    ))]
     CantReadProcessExitCode,
-    #[snafu(display("{}", source))]
+    #[error("{}", source)]
     CantGetCurrentVersion {
+        #[source]
         source: current_version::Error,
     },
-    #[snafu(display("No current version. Please run `fnm use <version>` and retry."))]
+    #[error("No current version. Please run `fnm use <version>` and retry.")]
     NoCurrentVersion,
-    #[snafu(display("command not provided. Please provide a command to run as an argument, like {} or {}.\n{} {}", "node".italic(), "bash".italic(), "example:".yellow().bold(), "fnm exec --using=12 node --version".italic().yellow()))]
+    #[error("command not provided. Please provide a command to run as an argument, like {} or {}.\n{} {}", "node".italic(), "bash".italic(), "example:".yellow().bold(), "fnm exec --using=12 node --version".italic().yellow())]
     NoBinaryProvided,
 }

src/commands/install.rs

@@ -10,16 +10,15 @@ use crate::version::Version;
 use crate::version_files::get_user_version_for_directory;
 use colored::Colorize;
 use log::debug;
-use snafu::{ensure, OptionExt, ResultExt, Snafu};
+use thiserror::Error;
-use structopt::StructOpt;
 
-#[derive(StructOpt, Debug, Default)]
+#[derive(clap::Parser, Debug, Default)]
 pub struct Install {
     /// A version string. Can be a partial semver or a LTS version name by the format lts/NAME
     pub version: Option<UserVersion>,
 
     /// Install latest LTS
-    #[structopt(long, conflicts_with = "version")]
+    #[clap(long, conflicts_with = "version")]
     pub lts: bool,
 }
 
@@ -50,21 +49,20 @@ impl super::command::Command for Install {
 
         let current_version = self
             .version()?
-            .or_else(|| get_user_version_for_directory(current_dir))
+            .or_else(|| get_user_version_for_directory(current_dir, config))
-            .context(CantInferVersion)?;
+            .ok_or(Error::CantInferVersion)?;
 
         let version = match current_version.clone() {
             UserVersion::Full(Version::Semver(actual_version)) => Version::Semver(actual_version),
             UserVersion::Full(v @ (Version::Bypassed | Version::Alias(_))) => {
-                ensure!(false, UninstallableVersion { version: v });
+                return Err(Error::UninstallableVersion { version: v });
-                unreachable!();
             }
             UserVersion::Full(Version::Lts(lts_type)) => {
                 let available_versions: Vec<_> = remote_node_index::list(&config.node_dist_mirror)
-                    .context(CantListRemoteVersions)?;
+                    .map_err(|source| Error::CantListRemoteVersions { source })?;
                 let picked_version = lts_type
                     .pick_latest(&available_versions)
-                    .with_context(|| CantFindRelevantLts {
+                    .ok_or_else(|| Error::CantFindRelevantLts {
                         lts_type: lts_type.clone(),
                     })?
                     .version
@@ -78,14 +76,14 @@ impl super::command::Command for Install {
             }
             current_version => {
                 let available_versions: Vec<_> = remote_node_index::list(&config.node_dist_mirror)
-                    .context(CantListRemoteVersions)?
+                    .map_err(|source| Error::CantListRemoteVersions { source })?
                     .drain(..)
                     .map(|x| x.version)
                     .collect();
 
                 current_version
                     .to_version(&available_versions, config)
-                    .context(CantFindNodeVersion {
+                    .ok_or(Error::CantFindNodeVersion {
                         requested_version: current_version,
                     })?
                     .clone()
@@ -113,7 +111,7 @@ impl super::command::Command for Install {
             Err(err @ DownloaderError::VersionAlreadyInstalled { .. }) => {
                 outln!(config, Error, "{} {}", "warning:".bold().yellow(), err);
             }
-            other_err => other_err.context(DownloadError)?,
+            other_err => other_err.map_err(|source| Error::DownloadError { source })?,
         };
 
         if let UserVersion::Full(Version::Lts(lts_type)) = current_version {
@@ -123,51 +121,41 @@ impl super::command::Command for Install {
                 alias_name.cyan(),
                 version.v_str().cyan()
             );
-            create_alias(config, &alias_name, &version).context(IoError)?;
+            create_alias(config, &alias_name, &version)?;
         }
 
         if !config.default_version_dir().exists() {
             debug!("Tagging {} as the default version", version.v_str().cyan());
-            create_alias(config, "default", &version).context(IoError)?;
+            create_alias(config, "default", &version)?;
         }
 
         Ok(())
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't download the requested binary: {}", source))]
+    #[error("Can't download the requested binary: {}", source)]
-    DownloadError {
+    DownloadError { source: DownloaderError },
-        source: DownloaderError,
+    #[error(transparent)]
-    },
     IoError {
+        #[from]
         source: std::io::Error,
     },
-    #[snafu(display(
+    #[error("Can't find version in dotfiles. Please provide a version manually to the command.")]
-        "Can't find version in dotfiles. Please provide a version manually to the command."
-    ))]
     CantInferVersion,
-    #[snafu(display("Having a hard time listing the remote versions: {}", source))]
+    #[error("Having a hard time listing the remote versions: {}", source)]
-    CantListRemoteVersions {
+    CantListRemoteVersions { source: crate::http::Error },
-        source: crate::http::Error,
+    #[error(
-    },
-    #[snafu(display(
         "Can't find a Node version that matches {} in remote",
         requested_version
-    ))]
+    )]
-    CantFindNodeVersion {
+    CantFindNodeVersion { requested_version: UserVersion },
-        requested_version: UserVersion,
+    #[error("Can't find relevant LTS named {}", lts_type)]
-    },
+    CantFindRelevantLts { lts_type: crate::lts::LtsType },
-    #[snafu(display("Can't find relevant LTS named {}", lts_type))]
+    #[error("The requested version is not installable: {}", version.v_str())]
-    CantFindRelevantLts {
+    UninstallableVersion { version: Version },
-        lts_type: crate::lts::LtsType,
+    #[error("Too many versions provided. Please don't use --lts with a version string.")]
-    },
-    #[snafu(display("The requested version is not installable: {}", version.v_str()))]
-    UninstallableVersion {
-        version: Version,
-    },
-    #[snafu(display("Too many versions provided. Please don't use --lts with a version string."))]
     TooManyVersionsProvided,
 }
 

src/commands/ls_local.rs

@@ -3,11 +3,10 @@ use crate::config::FnmConfig;
 use crate::current_version::current_version;
 use crate::version::Version;
 use colored::Colorize;
-use snafu::{ResultExt, Snafu};
 use std::collections::HashMap;
-use structopt::StructOpt;
+use thiserror::Error;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct LsLocal {}
 
 impl super::command::Command for LsLocal {
@@ -15,16 +14,17 @@ impl super::command::Command for LsLocal {
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
         let base_dir = config.installations_dir();
-        let mut versions =
+        let mut versions = crate::installed_versions::list(base_dir)
-            crate::installed_versions::list(base_dir).context(CantListLocallyInstalledVersion)?;
+            .map_err(|source| Error::CantListLocallyInstalledVersion { source })?;
         versions.insert(0, Version::Bypassed);
         versions.sort();
-        let aliases_hash = generate_aliases_hash(config).context(CantReadAliases)?;
+        let aliases_hash =
+            generate_aliases_hash(config).map_err(|source| Error::CantReadAliases { source })?;
         let curr_version = current_version(config).ok().flatten();
 
         for version in versions {
             let version_aliases = match aliases_hash.get(&version.v_str()) {
-                None => "".into(),
+                None => String::new(),
                 Some(versions) => {
                     let version_string = versions
                         .iter()
@@ -60,12 +60,12 @@ fn generate_aliases_hash(config: &FnmConfig) -> std::io::Result<HashMap<String,
     Ok(hashmap)
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't list locally installed versions: {}", source))]
+    #[error("Can't list locally installed versions: {}", source)]
     CantListLocallyInstalledVersion {
         source: crate::installed_versions::Error,
     },
-    #[snafu(display("Can't read aliases: {}", source))]
+    #[error("Can't read aliases: {}", source)]
     CantReadAliases { source: std::io::Error },
 }

src/commands/ls_remote.rs

@@ -1,16 +1,15 @@
 use crate::config::FnmConfig;
 use crate::remote_node_index;
-use snafu::{ResultExt, Snafu};
+use thiserror::Error;
-use structopt::StructOpt;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct LsRemote {}
 
 impl super::command::Command for LsRemote {
     type Error = Error;
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
-        let all_versions = remote_node_index::list(&config.node_dist_mirror).context(HttpError)?;
+        let all_versions = remote_node_index::list(&config.node_dist_mirror)?;
 
         for version in all_versions {
             print!("{}", version.version);
@@ -24,7 +23,11 @@ impl super::command::Command for LsRemote {
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    HttpError { source: crate::http::Error },
+    #[error(transparent)]
+    HttpError {
+        #[from]
+        source: crate::http::Error,
+    },
 }

src/commands/unalias.rs

@@ -3,10 +3,9 @@ use crate::fs::remove_symlink_dir;
 use crate::user_version::UserVersion;
 use crate::version::Version;
 use crate::{choose_version_for_user_input, config::FnmConfig};
-use snafu::{OptionExt, ResultExt, Snafu};
+use thiserror::Error;
-use structopt::StructOpt;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct Unalias {
     pub(crate) requested_alias: String,
 }
@@ -21,20 +20,21 @@ impl Command for Unalias {
         )
         .ok()
         .flatten()
-        .with_context(|| AliasNotFound {
+        .ok_or(Error::AliasNotFound {
             requested_alias: self.requested_alias,
         })?;
 
-        remove_symlink_dir(&requested_version.path()).context(CantDeleteSymlink)?;
+        remove_symlink_dir(requested_version.path())
+            .map_err(|source| Error::CantDeleteSymlink { source })?;
 
         Ok(())
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't delete symlink: {}", source))]
+    #[error("Can't delete symlink: {}", source)]
     CantDeleteSymlink { source: std::io::Error },
-    #[snafu(display("Requested alias {} not found", requested_alias))]
+    #[error("Requested alias {} not found", requested_alias)]
     AliasNotFound { requested_alias: String },
 }

src/commands/uninstall.rs

@@ -8,10 +8,9 @@ use crate::version::Version;
 use crate::version_files::get_user_version_for_directory;
 use colored::Colorize;
 use log::debug;
-use snafu::{ensure, OptionExt, ResultExt, Snafu};
+use thiserror::Error;
-use structopt::StructOpt;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct Uninstall {
     version: Option<UserVersion>,
 }
@@ -20,49 +19,48 @@ impl Command for Uninstall {
     type Error = Error;
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
-        let all_versions =
+        let all_versions = installed_versions::list(config.installations_dir())
-            installed_versions::list(config.installations_dir()).context(VersionListingError)?;
+            .map_err(|source| Error::VersionListingError { source })?;
         let requested_version = self
             .version
             .or_else(|| {
                 let current_dir = std::env::current_dir().unwrap();
-                get_user_version_for_directory(current_dir)
+                get_user_version_for_directory(current_dir, config)
             })
-            .context(CantInferVersion)?;
+            .ok_or(Error::CantInferVersion)?;
 
-        ensure!(
+        if matches!(requested_version, UserVersion::Full(Version::Bypassed)) {
-            !matches!(requested_version, UserVersion::Full(Version::Bypassed)),
+            return Err(Error::CantUninstallSystemVersion);
-            CantUninstallSystemVersion
+        }
-        );
 
         let available_versions: Vec<&Version> = all_versions
             .iter()
             .filter(|v| requested_version.matches(v, config))
             .collect();
 
-        ensure!(
+        if available_versions.len() >= 2 {
-            available_versions.len() < 2,
+            return Err(Error::PleaseBeMoreSpecificToDelete {
-            PleaseBeMoreSpecificToDelete {
                 matched_versions: available_versions
                     .iter()
-                    .map(|x| x.v_str())
+                    .map(std::string::ToString::to_string)
-                    .collect::<Vec<_>>()
+                    .collect(),
-            }
+            });
-        );
+        }
 
         let version = requested_version
             .to_version(&all_versions, config)
-            .context(CantFindVersion)?;
+            .ok_or(Error::CantFindVersion)?;
 
-        let matching_aliases = version.find_aliases(config).context(IoError)?;
+        let matching_aliases = version.find_aliases(config)?;
         let root_path = version
             .root_path(config)
-            .with_context(|| RootPathNotFound {
+            .ok_or_else(|| Error::RootPathNotFound {
                 version: version.clone(),
             })?;
 
         debug!("Removing Node version from {:?}", root_path);
-        std::fs::remove_dir_all(root_path).context(CantDeleteNodeVersion)?;
+        std::fs::remove_dir_all(root_path)
+            .map_err(|source| Error::CantDeleteNodeVersion { source })?;
         outln!(
             config,
             Info,
@@ -72,7 +70,8 @@ impl Command for Uninstall {
 
         for alias in matching_aliases {
             debug!("Removing alias from {:?}", alias.path());
-            remove_symlink_dir(alias.path()).context(CantDeleteSymlink)?;
+            remove_symlink_dir(alias.path())
+                .map_err(|source| Error::CantDeleteSymlink { source })?;
             outln!(
                 config,
                 Info,
@@ -85,26 +84,27 @@ impl Command for Uninstall {
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't get locally installed versions: {}", source))]
+    #[error("Can't get locally installed versions: {}", source)]
     VersionListingError { source: installed_versions::Error },
-    #[snafu(display(
+    #[error("Can't find version in dotfiles. Please provide a version manually to the command.")]
-        "Can't find version in dotfiles. Please provide a version manually to the command."
-    ))]
     CantInferVersion,
-    #[snafu(display("Can't uninstall system version"))]
+    #[error("Can't uninstall system version")]
     CantUninstallSystemVersion,
-    #[snafu(display("Too many versions had matched, please be more specific.\nFound {} matching versions, expected 1:\n{}", matched_versions.len(), matched_versions.iter().map(|v| format!("* {}", v)).collect::<Vec<_>>().join("\n")))]
+    #[error("Too many versions had matched, please be more specific.\nFound {} matching versions, expected 1:\n{}", matched_versions.len(), matched_versions.iter().map(|v| format!("* {}", v)).collect::<Vec<_>>().join("\n"))]
     PleaseBeMoreSpecificToDelete { matched_versions: Vec<String> },
-    #[snafu(display("Can't find a matching version"))]
+    #[error("Can't find a matching version")]
     CantFindVersion,
-    #[snafu(display("Root path not found for version {}", version))]
+    #[error("Root path not found for version {}", version)]
     RootPathNotFound { version: Version },
-    #[snafu(display("io error: {}", source))]
+    #[error("io error: {}", source)]
-    IoError { source: std::io::Error },
+    IoError {
-    #[snafu(display("Can't delete Node.js version: {}", source))]
+        #[from]
+        source: std::io::Error,
+    },
+    #[error("Can't delete Node.js version: {}", source)]
     CantDeleteNodeVersion { source: std::io::Error },
-    #[snafu(display("Can't delete symlink: {}", source))]
+    #[error("Can't delete symlink: {}", source)]
     CantDeleteSymlink { source: std::io::Error },
 }

src/commands/use.rs

@@ -1,65 +1,75 @@
 use super::command::Command;
 use super::install::Install;
+use crate::current_version::current_version;
 use crate::fs;
 use crate::installed_versions;
 use crate::outln;
 use crate::system_version;
 use crate::user_version::UserVersion;
 use crate::version::Version;
+use crate::version_file_strategy::VersionFileStrategy;
+use crate::version_switch_strategy::VersionSwitchStrategy;
 use crate::{config::FnmConfig, user_version_reader::UserVersionReader};
 use colored::Colorize;
-use snafu::{ensure, OptionExt, ResultExt, Snafu};
+use std::path::Path;
-use structopt::StructOpt;
+use thiserror::Error;
 
-#[derive(StructOpt, Debug)]
+#[derive(clap::Parser, Debug)]
 pub struct Use {
     version: Option<UserVersionReader>,
     /// Install the version if it isn't installed yet
-    #[structopt(long)]
+    #[clap(long)]
     install_if_missing: bool,
+
+    /// Don't output a message identifying the version being used
+    /// if it will not change due to execution of this command
+    #[clap(long)]
+    silent_if_unchanged: bool,
 }
 
 impl Command for Use {
     type Error = Error;
 
     fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> {
-        let multishell_path = config.multishell_path().context(FnmEnvWasNotSourced)?;
+        let multishell_path = config.multishell_path().ok_or(Error::FnmEnvWasNotSourced)?;
         warn_if_multishell_path_not_in_path_env_var(multishell_path, config);
 
-        let all_versions =
+        let all_versions = installed_versions::list(config.installations_dir())
-            installed_versions::list(config.installations_dir()).context(VersionListingError)?;
+            .map_err(|source| Error::VersionListingError { source })?;
         let requested_version = self
             .version
             .unwrap_or_else(|| {
                 let current_dir = std::env::current_dir().unwrap();
                 UserVersionReader::Path(current_dir)
             })
-            .into_user_version()
+            .into_user_version(config)
-            .context(CantInferVersion)?;
+            .ok_or_else(|| match config.version_file_strategy() {
+                VersionFileStrategy::Local => InferVersionError::Local,
+                VersionFileStrategy::Recursive => InferVersionError::Recursive,
+            })
+            .map_err(|source| Error::CantInferVersion { source })?;
 
-        let version_path = if let UserVersion::Full(Version::Bypassed) = requested_version {
+        let (message, version_path) = if let UserVersion::Full(Version::Bypassed) =
-            outln!(
+            requested_version
-                config,
+        {
-                Info,
+            let message = format!(
                 "Bypassing fnm: using {} node",
                 system_version::display_name().cyan()
             );
-            system_version::path()
+            (message, system_version::path())
         } else if let Some(alias_name) = requested_version.alias_name() {
             let alias_path = config.aliases_dir().join(&alias_name);
             let system_path = system_version::path();
             if matches!(fs::shallow_read_symlink(&alias_path), Ok(shallow_path) if shallow_path == system_path)
             {
-                outln!(
+                let message = format!(
-                    config,
-                    Info,
                     "Bypassing fnm: using {} node",
                     system_version::display_name().cyan()
                 );
-                system_path
+                (message, system_path)
             } else if alias_path.exists() {
-                outln!(config, Info, "Using Node for alias {}", alias_name.cyan());
+                let message = format!("Using Node for alias {}", alias_name.cyan());
-                alias_path
+                (message, alias_path)
             } else {
                 install_new_version(requested_version, config, self.install_if_missing)?;
                 return Ok(());
@@ -67,45 +77,67 @@ impl Command for Use {
         } else {
             let current_version = requested_version.to_version(&all_versions, config);
             if let Some(version) = current_version {
-                outln!(config, Info, "Using Node {}", version.to_string().cyan());
+                let version_path = config
-                config
                     .installations_dir()
                     .join(version.to_string())
-                    .join("installation")
+                    .join("installation");
+                let message = format!("Using Node {}", version.to_string().cyan());
+                (message, version_path)
             } else {
                 install_new_version(requested_version, config, self.install_if_missing)?;
                 return Ok(());
             }
         };
 
-        replace_symlink(&version_path, multishell_path).context(SymlinkingCreationIssue)?;
+        if !self.silent_if_unchanged || will_version_change(&version_path, config) {
+            outln!(config, Info, "{}", message);
+        }
+
+        if let Some(multishells_path) = multishell_path.parent() {
+            std::fs::create_dir_all(multishells_path).map_err(|_err| {
+                Error::MultishellDirectoryCreationIssue {
+                    path: multishells_path.to_path_buf(),
+                }
+            })?;
+        }
+
+        replace_symlink(&version_path, multishell_path)
+            .map_err(|source| Error::SymlinkingCreationIssue { source })?;
 
         Ok(())
     }
 }
 
+fn will_version_change(resolved_path: &Path, config: &FnmConfig) -> bool {
+    let current_version_path = current_version(config)
+        .unwrap_or(None)
+        .map(|v| v.installation_path(config));
+
+    current_version_path.as_deref() != Some(resolved_path)
+}
+
 fn install_new_version(
     requested_version: UserVersion,
     config: &FnmConfig,
     install_if_missing: bool,
 ) -> Result<(), Error> {
-    ensure!(
+    if !install_if_missing && !should_install_interactively(&requested_version) {
-        install_if_missing || should_install_interactively(&requested_version),
+        return Err(Error::CantFindVersion {
-        CantFindVersion {
+            version: requested_version,
-            version: requested_version
+        });
-        }
+    }
-    );
 
     Install {
         version: Some(requested_version.clone()),
         ..Install::default()
     }
     .apply(config)
-    .context(InstallError)?;
+    .map_err(|source| Error::InstallError { source })?;
 
     Use {
         version: Some(UserVersionReader::Direct(requested_version)),
         install_if_missing: true,
+        silent_if_unchanged: false,
     }
     .apply(config)?;
 
@@ -119,8 +151,8 @@ fn install_new_version(
 ///
 /// This way, we can create a symlink if it is missing.
 fn replace_symlink(from: &std::path::Path, to: &std::path::Path) -> std::io::Result<()> {
-    let symlink_deletion_result = fs::remove_symlink_dir(&to);
+    let symlink_deletion_result = fs::remove_symlink_dir(to);
-    match fs::symlink_dir(&from, &to) {
+    match fs::symlink_dir(from, to) {
         ok @ Ok(_) => ok,
         err @ Err(_) => symlink_deletion_result.and(err),
     }
@@ -153,6 +185,13 @@ fn warn_if_multishell_path_not_in_path_env_var(
     multishell_path: &std::path::Path,
     config: &FnmConfig,
 ) {
+    if matches!(
+        config.version_switch_strategy(),
+        VersionSwitchStrategy::Shims
+    ) {
+        return;
+    }
+
     let bin_path = if cfg!(unix) {
         multishell_path.join("bin")
     } else {
@@ -175,27 +214,36 @@ fn warn_if_multishell_path_not_in_path_env_var(
     );
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display("Can't create the symlink: {}", source))]
+    #[error("Can't create the symlink: {}", source)]
     SymlinkingCreationIssue { source: std::io::Error },
-    #[snafu(display("Can't read the symlink: {}", source))]
+    #[error(transparent)]
-    SymlinkReadFailed { source: std::io::Error },
-    #[snafu(display("{}", source))]
     InstallError { source: <Install as Command>::Error },
-    #[snafu(display("Can't get locally installed versions: {}", source))]
+    #[error("Can't get locally installed versions: {}", source)]
     VersionListingError { source: installed_versions::Error },
-    #[snafu(display("Requested version {} is not currently installed", version))]
+    #[error("Requested version {} is not currently installed", version)]
     CantFindVersion { version: UserVersion },
-    #[snafu(display(
+    #[error(transparent)]
-        "Can't find version in dotfiles. Please provide a version manually to the command."
+    CantInferVersion {
-    ))]
+        #[from]
-    CantInferVersion,
+        source: InferVersionError,
-    #[snafu(display(
+    },
+    #[error(
         "{}\n{}\n{}",
         "We can't find the necessary environment variables to replace the Node version.",
         "You should setup your shell profile to evaluate `fnm env`, see https://github.com/Schniz/fnm#shell-setup on how to do this",
         "Check out our documentation for more information: https://fnm.vercel.app"
-    ))]
+    )]
     FnmEnvWasNotSourced,
+    #[error("Can't create the multishell directory: {}", path.display())]
+    MultishellDirectoryCreationIssue { path: std::path::PathBuf },
+}
+
+#[derive(Debug, Error)]
+pub enum InferVersionError {
+    #[error("Can't find version in dotfiles. Please provide a version manually to the command.")]
+    Local,
+    #[error("Could not find any version to use. Maybe you don't have a default version set?\nTry running `fnm default <VERSION>` to set one,\nor create a .node-version file inside your project to declare a Node.js version.")]
+    Recursive,
 }

src/config.rs

@@ -1,19 +1,14 @@
-use crate::arch::Arch;
 use crate::log_level::LogLevel;
-use crate::outln;
 use crate::path_ext::PathExt;
-use colored::Colorize;
+use crate::version_file_strategy::VersionFileStrategy;
+use crate::{arch::Arch, version_switch_strategy::VersionSwitchStrategy};
 use dirs::{data_dir, home_dir};
-use std::sync::atomic::{AtomicBool, Ordering};
-use structopt::StructOpt;
 use url::Url;
 
-static HAS_WARNED_DEPRECATED_BASE_DIR: AtomicBool = AtomicBool::new(false);
+#[derive(clap::Parser, Debug)]
-
-#[derive(StructOpt, Debug)]
 pub struct FnmConfig {
     /// https://nodejs.org/dist/ mirror
-    #[structopt(
+    #[clap(
         long,
         env = "FNM_NODE_DIST_MIRROR",
         default_value = "https://nodejs.org/dist",
@@ -23,7 +18,7 @@ pub struct FnmConfig {
     pub node_dist_mirror: Url,
 
     /// The root directory of fnm installations.
-    #[structopt(
+    #[clap(
         long = "fnm-dir",
         env = "FNM_DIR",
         global = true,
@@ -34,16 +29,11 @@ pub struct FnmConfig {
     /// Where the current node version link is stored.
     /// This value will be populated automatically by evaluating
     /// `fnm env` in your shell profile. Read more about it using `fnm help env`
-    #[structopt(
+    #[clap(long, env = "FNM_MULTISHELL_PATH", hide_env_values = true, hide = true)]
-        long,
-        env = "FNM_MULTISHELL_PATH",
-        hide_env_values = true,
-        hidden = true
-    )]
     multishell_path: Option<std::path::PathBuf>,
 
     /// The log level of fnm commands
-    #[structopt(
+    #[clap(
         long,
         env = "FNM_LOGLEVEL",
         default_value = "info",
@@ -55,14 +45,39 @@ pub struct FnmConfig {
 
     /// Override the architecture of the installed Node binary.
     /// Defaults to arch of fnm binary.
-    #[structopt(
+    #[clap(
         long,
         env = "FNM_ARCH",
-        default_value,
+        default_value_t,
         global = true,
-        hide_env_values = true
+        hide_env_values = true,
+        hide_default_value = true
     )]
     pub arch: Arch,
+
+    /// A strategy for how to resolve the Node version. Used whenever `fnm use` or `fnm install` is
+    /// called without a version, or when `--use-on-cd` is configured on evaluation.
+    ///
+    /// * `local`: Use the local version of Node defined within the current directory
+    ///
+    /// * `recursive`: Use the version of Node defined within the current directory and all parent directories
+    #[clap(
+        long,
+        env = "FNM_VERSION_FILE_STRATEGY",
+        possible_values = VersionFileStrategy::possible_values(),
+        default_value = "local",
+        global = true,
+        hide_env_values = true,
+    )]
+    version_file_strategy: VersionFileStrategy,
+
+    #[clap(
+        env = "FNM_VERSION_SWITCH_STRATEGY",
+        hide = true,
+        possible_values = VersionSwitchStrategy::possible_values(),
+        default_value = "path-symlink"
+    )]
+    version_switch_strategy: VersionSwitchStrategy,
 }
 
 impl Default for FnmConfig {
@@ -73,11 +88,17 @@ impl Default for FnmConfig {
             multishell_path: None,
             log_level: LogLevel::Info,
             arch: Arch::default(),
+            version_file_strategy: VersionFileStrategy::default(),
+            version_switch_strategy: VersionSwitchStrategy::default(),
         }
     }
 }
 
 impl FnmConfig {
+    pub fn version_file_strategy(&self) -> &VersionFileStrategy {
+        &self.version_file_strategy
+    }
+
     pub fn multishell_path(&self) -> Option<&std::path::Path> {
         match &self.multishell_path {
             None => None,
@@ -102,24 +123,6 @@ impl FnmConfig {
         let modern = data_dir().map(|dir| dir.join("fnm"));
 
         if let Some(dir) = legacy {
-            if !HAS_WARNED_DEPRECATED_BASE_DIR.load(Ordering::SeqCst) {
-                HAS_WARNED_DEPRECATED_BASE_DIR.store(true, Ordering::SeqCst);
-
-                let legacy_str = dir.display().to_string();
-                let modern_str = modern.map_or("$XDG_DATA_HOME/fnm".to_string(), |path| {
-                    path.display().to_string()
-                });
-
-                outln!(
-                    self, Error,
-                    "{}\n  It looks like you have the {} directory on your disk.\n  fnm is migrating its default storage location for application data to {}.\n  You can read more about it here: {}\n",
-                    "warning:".yellow().bold(),
-                    legacy_str.italic(),
-                    modern_str.italic(),
-                    "https://github.com/schniz/fnm/issues/357".italic()
-                );
-            }
-
             return dir;
         }
 
@@ -144,6 +147,10 @@ impl FnmConfig {
             .ensure_exists_silently()
     }
 
+    pub fn version_switch_strategy(&self) -> &VersionSwitchStrategy {
+        &self.version_switch_strategy
+    }
+
     #[cfg(test)]
     pub fn with_base_dir(mut self, base_dir: Option<std::path::PathBuf>) -> Self {
         self.base_dir = base_dir;

src/current_version.rs

@@ -1,10 +1,11 @@
+use thiserror::Error;
+
 use crate::config::FnmConfig;
 use crate::system_version;
 use crate::version::Version;
-use snafu::{OptionExt, ResultExt, Snafu};
 
 pub fn current_version(config: &FnmConfig) -> Result<Option<Version>, Error> {
-    let multishell_path = config.multishell_path().context(EnvNotApplied)?;
+    let multishell_path = config.multishell_path().ok_or(Error::EnvNotApplied)?;
 
     if multishell_path.read_link().ok() == Some(system_version::path()) {
         return Ok(Some(Version::Bypassed));
@@ -19,20 +20,21 @@ pub fn current_version(config: &FnmConfig) -> Result<Option<Version>, Error> {
             .expect("Can't get filename")
             .to_str()
             .expect("Invalid OS string");
-        let version = Version::parse(file_name).context(VersionError { version: file_name })?;
+        let version = Version::parse(file_name).map_err(|source| Error::VersionError {
+            source,
+            version: file_name.to_string(),
+        })?;
         Ok(Some(version))
     } else {
         Ok(None)
     }
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    #[snafu(display(
+    #[error("`fnm env` was not applied in this context.\nCan't find fnm's environment variables")]
-        "`fnm env` was not applied in this context.\nCan't find fnm's environment variables"
-    ))]
     EnvNotApplied,
-    #[snafu(display("Can't read the version as a valid semver"))]
+    #[error("Can't read the version as a valid semver")]
     VersionError {
         source: semver::Error,
         version: String,

src/default_version.rs

@@ -0,0 +1,9 @@
+use crate::config::FnmConfig;
+use crate::version::Version;
+use std::str::FromStr;
+
+pub fn find_default_version(config: &FnmConfig) -> Option<Version> {
+    let version_path = config.default_version_dir().canonicalize().ok()?;
+    let file_name = version_path.parent()?.file_name()?;
+    Version::from_str(file_name.to_str()?).ok()?.into()
+}

src/directories.rs

@@ -0,0 +1,26 @@
+use std::path::PathBuf;
+
+fn xdg_dir(env: &str) -> Option<PathBuf> {
+    let env_var = std::env::var(env).ok()?;
+    Some(PathBuf::from(env_var))
+}
+
+fn state_dir() -> Option<PathBuf> {
+    xdg_dir("XDG_STATE_HOME").or_else(dirs::state_dir)
+}
+
+fn cache_dir() -> Option<PathBuf> {
+    xdg_dir("XDG_CACHE_HOME").or_else(dirs::cache_dir)
+}
+
+fn runtime_dir() -> Option<PathBuf> {
+    xdg_dir("XDG_RUNTIME_DIR").or_else(dirs::runtime_dir)
+}
+
+pub fn multishell_storage() -> PathBuf {
+    runtime_dir()
+        .or_else(state_dir)
+        .or_else(cache_dir)
+        .unwrap_or_else(std::env::temp_dir)
+        .join("fnm_multishells")
+}

src/downloader.rs

@@ -4,38 +4,34 @@ use crate::archive::{Error as ExtractError, Extract};
 use crate::directory_portal::DirectoryPortal;
 use crate::version::Version;
 use log::debug;
-use snafu::{ensure, OptionExt, ResultExt, Snafu};
 use std::path::Path;
 use std::path::PathBuf;
+use thiserror::Error;
 use url::Url;
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
+    #[error(transparent)]
     HttpError {
+        #[from]
         source: crate::http::Error,
     },
+    #[error(transparent)]
     IoError {
+        #[from]
         source: std::io::Error,
     },
-    #[snafu(display("Can't extract the file: {}", source))]
+    #[error("Can't extract the file: {}", source)]
     CantExtractFile {
+        #[from]
         source: ExtractError,
     },
-    #[snafu(display("The downloaded archive is empty"))]
+    #[error("The downloaded archive is empty")]
     TarIsEmpty,
-    #[snafu(display(
+    #[error("{} for {} not found upstream.\nYou can `fnm ls-remote` to see available versions or try a different `--arch`.", version, arch)]
-        "{} for {} not found upstream.\nYou can `fnm ls-remote` to see available versions or try a different `--arch`.",
+    VersionNotFound { version: Version, arch: Arch },
-        version,
+    #[error("Version already installed at {:?}", path)]
-        arch
+    VersionAlreadyInstalled { path: PathBuf },
-    ))]
-    VersionNotFound {
-        version: Version,
-        arch: Arch,
-    },
-    #[snafu(display("Version already installed at {:?}", path))]
-    VersionAlreadyInstalled {
-        path: PathBuf,
-    },
 }
 
 #[cfg(unix)]
@@ -75,7 +71,7 @@ pub fn extract_archive_into<P: AsRef<Path>>(
     let extractor = archive::TarXz::new(response);
     #[cfg(windows)]
     let extractor = archive::Zip::new(response);
-    extractor.extract_into(path).context(CantExtractFile)?;
+    extractor.extract_into(path)?;
     Ok(())
 }
 
@@ -88,23 +84,22 @@ pub fn install_node_dist<P: AsRef<Path>>(
 ) -> Result<(), Error> {
     let installation_dir = PathBuf::from(installations_dir.as_ref()).join(version.v_str());
 
-    ensure!(
+    if installation_dir.exists() {
-        !installation_dir.exists(),
+        return Err(Error::VersionAlreadyInstalled {
-        VersionAlreadyInstalled {
+            path: installation_dir,
-            path: installation_dir
+        });
-        }
+    }
-    );
 
-    std::fs::create_dir_all(installations_dir.as_ref()).context(IoError)?;
+    std::fs::create_dir_all(installations_dir.as_ref())?;
 
     let temp_installations_dir = installations_dir.as_ref().join(".downloads");
-    std::fs::create_dir_all(&temp_installations_dir).context(IoError)?;
+    std::fs::create_dir_all(&temp_installations_dir)?;
 
     let portal = DirectoryPortal::new_in(&temp_installations_dir, installation_dir);
 
     let url = download_url(node_dist_mirror, version, arch);
     debug!("Going to call for {}", &url);
-    let response = crate::http::get(url.as_str()).context(HttpError)?;
+    let response = crate::http::get(url.as_str())?;
 
     if response.status() == 404 {
         return Err(Error::VersionNotFound {
@@ -117,17 +112,15 @@ pub fn install_node_dist<P: AsRef<Path>>(
     extract_archive_into(&portal, response)?;
     debug!("Extraction completed");
 
-    let installed_directory = std::fs::read_dir(&portal)
+    let installed_directory = std::fs::read_dir(&portal)?
-        .context(IoError)?
         .next()
-        .context(TarIsEmpty)?
+        .ok_or(Error::TarIsEmpty)??;
-        .context(IoError)?;
     let installed_directory = installed_directory.path();
 
     let renamed_installation_dir = portal.join("installation");
-    std::fs::rename(installed_directory, renamed_installation_dir).context(IoError)?;
+    std::fs::rename(installed_directory, renamed_installation_dir)?;
 
-    portal.teleport().context(IoError)?;
+    portal.teleport()?;
 
     Ok(())
 }
@@ -159,13 +152,11 @@ mod tests {
     #[test_log::test]
     fn test_installing_npm() {
         let installations_dir = tempdir().unwrap();
-        let npm_path = install_in(installations_dir.path()).join(if cfg!(windows) {
+        let bin_dir = install_in(installations_dir.path());
-            "npm.cmd"
+        let npm_path = bin_dir.join(if cfg!(windows) { "npm.cmd" } else { "npm" });
-        } else {
-            "npm"
-        });
 
         let stdout = duct::cmd(npm_path.to_str().unwrap(), vec!["--version"])
+            .env("PATH", bin_dir)
             .stdout_capture()
             .run()
             .expect("Can't run npm")

src/installed_versions.rs

@@ -1,11 +1,11 @@
 use crate::version::Version;
-use snafu::{ResultExt, Snafu};
 use std::path::Path;
+use thiserror::Error;
 
 pub fn list<P: AsRef<Path>>(installations_dir: P) -> Result<Vec<Version>, Error> {
     let mut vec = vec![];
-    for result_entry in installations_dir.as_ref().read_dir().context(IoError)? {
+    for result_entry in installations_dir.as_ref().read_dir()? {
-        let entry = result_entry.context(IoError)?;
+        let entry = result_entry?;
         if entry
             .file_name()
             .to_str()
@@ -17,19 +17,25 @@ pub fn list<P: AsRef<Path>>(installations_dir: P) -> Result<Vec<Version>, Error>
         let path = entry.path();
         let filename = path
             .file_name()
-            .ok_or_else(|| std::io::Error::from(std::io::ErrorKind::NotFound))
+            .ok_or_else(|| std::io::Error::from(std::io::ErrorKind::NotFound))?
-            .context(IoError)?
             .to_str()
-            .ok_or_else(|| std::io::Error::from(std::io::ErrorKind::NotFound))
+            .ok_or_else(|| std::io::Error::from(std::io::ErrorKind::NotFound))?;
-            .context(IoError)?;
+        let version = Version::parse(filename)?;
-        let version = Version::parse(filename).context(SemverError)?;
         vec.push(version);
     }
     Ok(vec)
 }
 
-#[derive(Debug, Snafu)]
+#[derive(Debug, Error)]
 pub enum Error {
-    IoError { source: std::io::Error },
+    #[error(transparent)]
-    SemverError { source: semver::Error },
+    IoError {
+        #[from]
+        source: std::io::Error,
+    },
+    #[error(transparent)]
+    SemverError {
+        #[from]
+        source: semver::Error,
+    },
 }

src/log_level.rs

@@ -22,6 +22,14 @@ impl LogLevel {
         }
     }
 
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            Self::Quiet => "quiet",
+            Self::Error => "error",
+            Self::Info => "info",
+        }
+    }
+
     pub fn possible_values() -> &'static [&'static str; 4] {
         &["quiet", "info", "all", "error"]
     }
@@ -29,11 +37,7 @@ impl LogLevel {
 
 impl From<LogLevel> for &'static str {
     fn from(level: LogLevel) -> Self {
-        match level {
+        level.as_str()
-            LogLevel::Quiet => "quiet",
-            LogLevel::Info => "info",
-            LogLevel::Error => "error",
-        }
     }
 }
 

src/main.rs

@@ -29,10 +29,14 @@ mod system_version;
 mod user_version;
 mod user_version_reader;
 mod version;
+mod version_file_strategy;
 mod version_files;
 
 #[macro_use]
 mod log_level;
+mod default_version;
+mod directories;
+mod version_switch_strategy;
 
 fn main() {
     env_logger::init();

src/shell/bash.rs

@@ -1,41 +1,54 @@
+use crate::version_file_strategy::VersionFileStrategy;
+
 use super::shell::Shell;
-use indoc::indoc;
+use indoc::{formatdoc, indoc};
 use std::path::Path;
 
 #[derive(Debug)]
 pub struct Bash;
 
 impl Shell for Bash {
-    fn to_structopt_shell(&self) -> structopt::clap::Shell {
+    fn to_clap_shell(&self) -> clap_complete::Shell {
-        structopt::clap::Shell::Bash
+        clap_complete::Shell::Bash
     }
 
-    fn path(&self, path: &Path) -> String {
+    fn path(&self, path: &Path) -> anyhow::Result<String> {
-        format!("export PATH={:?}:$PATH", path.to_str().unwrap())
+        let path = path
+            .to_str()
+            .ok_or_else(|| anyhow::anyhow!("Can't convert path to string"))?;
+        Ok(format!("export PATH={:?}:$PATH", path))
     }
 
     fn set_env_var(&self, name: &str, value: &str) -> String {
         format!("export {}={:?}", name, value)
     }
 
-    fn use_on_cd(&self, _config: &crate::config::FnmConfig) -> String {
+    fn use_on_cd(&self, config: &crate::config::FnmConfig) -> anyhow::Result<String> {
-        indoc!(
+        let autoload_hook = match config.version_file_strategy() {
-            r#"
+            VersionFileStrategy::Local => indoc!(
-                __fnm_use_if_file_found() {
+                r#"
                     if [[ -f .node-version || -f .nvmrc ]]; then
-                        fnm use
+                        fnm use --silent-if-unchanged
                     fi
-                }
+                "#
+            ),
+            VersionFileStrategy::Recursive => r#"fnm use --silent-if-unchanged"#,
+        };
+        Ok(formatdoc!(
+            r#"
+                __fnm_use_if_file_found() {{
+                    {autoload_hook}
+                }}
 
-                __fnmcd() {
+                __fnmcd() {{
                     \cd "$@" || return $?
                     __fnm_use_if_file_found
-                }
+                }}
 
                 alias cd=__fnmcd
                 __fnm_use_if_file_found
-            "#
+            "#,
-        )
+            autoload_hook = autoload_hook
-        .into()
+        ))
     }
 }

src/shell/fish.rs

@@ -1,36 +1,49 @@
+use crate::version_file_strategy::VersionFileStrategy;
+
 use super::shell::Shell;
-use indoc::indoc;
+use indoc::{formatdoc, indoc};
 use std::path::Path;
 
 #[derive(Debug)]
 pub struct Fish;
 
 impl Shell for Fish {
-    fn to_structopt_shell(&self) -> structopt::clap::Shell {
+    fn to_clap_shell(&self) -> clap_complete::Shell {
-        structopt::clap::Shell::Fish
+        clap_complete::Shell::Fish
     }
 
-    fn path(&self, path: &Path) -> String {
+    fn path(&self, path: &Path) -> anyhow::Result<String> {
-        format!("set -gx PATH {:?} $PATH;", path.to_str().unwrap())
+        let path = path
+            .to_str()
+            .ok_or_else(|| anyhow::anyhow!("Can't convert path to string"))?;
+        Ok(format!("set -gx PATH {:?} $PATH;", path))
     }
 
     fn set_env_var(&self, name: &str, value: &str) -> String {
         format!("set -gx {name} {value:?};", name = name, value = value)
     }
 
-    fn use_on_cd(&self, _config: &crate::config::FnmConfig) -> String {
+    fn use_on_cd(&self, config: &crate::config::FnmConfig) -> anyhow::Result<String> {
-        indoc!(
+        let autoload_hook = match config.version_file_strategy() {
+            VersionFileStrategy::Local => indoc!(
+                r#"
+                    if test -f .node-version -o -f .nvmrc
+                        fnm use --silent-if-unchanged
+                    end
+                "#
+            ),
+            VersionFileStrategy::Recursive => r#"fnm use --silent-if-unchanged"#,
+        };
+        Ok(formatdoc!(
             r#"
                 function _fnm_autoload_hook --on-variable PWD --description 'Change Node version on directory change'
                     status --is-command-substitution; and return
-                    if test -f .node-version -o -f .nvmrc
+                    {autoload_hook}
-                        fnm use
-                    end
                 end
 
                 _fnm_autoload_hook
-            "#
+            "#,
-        )
+            autoload_hook = autoload_hook
-        .into()
+        ))
     }
 }

src/shell/infer/mod.rs

@@ -1,34 +1,21 @@
-use super::{Bash, Fish, PowerShell, Shell, WindowsCmd, Zsh};
+mod unix;
-use log::debug;
-use std::ffi::OsStr;
-use sysinfo::{ProcessExt, System, SystemExt};
 
-pub fn infer_shell() -> Option<Box<dyn Shell>> {
+mod windows;
-    let mut system = System::new();
-    let mut current_pid = sysinfo::get_current_pid().ok();
 
-    while let Some(pid) = current_pid {
+#[cfg(unix)]
-        system.refresh_process(pid);
+pub use self::unix::infer_shell;
-        if let Some(process) = system.process(pid) {
+#[cfg(not(unix))]
-            current_pid = process.parent();
+pub use self::windows::infer_shell;
-            let process_name = process
-                .exe()
-                .file_stem()
-                .and_then(OsStr::to_str)
-                .map(str::to_lowercase);
-            let sliced = process_name.as_ref().map(|x| &x[..]);
-            match sliced {
-                Some("sh" | "bash") => return Some(Box::from(Bash)),
-                Some("zsh") => return Some(Box::from(Zsh)),
-                Some("fish") => return Some(Box::from(Fish)),
-                Some("pwsh" | "powershell") => return Some(Box::from(PowerShell)),
-                Some("cmd") => return Some(Box::from(WindowsCmd)),
-                cmd_name => debug!("binary is not a supported shell: {:?}", cmd_name),
-            };
-        } else {
-            current_pid = None;
-        }
-    }
 
+pub(self) fn shell_from_string(shell: &str) -> Option<Box<dyn super::Shell>> {
+    use super::{Bash, Fish, PowerShell, WindowsCmd, Zsh};
+    match shell {
+        "sh" | "bash" => return Some(Box::from(Bash)),
+        "zsh" => return Some(Box::from(Zsh)),
+        "fish" => return Some(Box::from(Fish)),
+        "pwsh" | "powershell" => return Some(Box::from(PowerShell)),
+        "cmd" => return Some(Box::from(WindowsCmd)),
+        cmd_name => log::debug!("binary is not a supported shell: {:?}", cmd_name),
+    };
     None
 }

src/shell/infer/unix.rs

@@ -0,0 +1,121 @@
+#![cfg(unix)]
+
+use crate::shell::Shell;
+use log::debug;
+use std::io::{Error, ErrorKind};
+use thiserror::Error;
+
+#[derive(Debug)]
+struct ProcessInfo {
+    parent_pid: Option<u32>,
+    command: String,
+}
+
+const MAX_ITERATIONS: u8 = 10;
+
+pub fn infer_shell() -> Option<Box<dyn Shell>> {
+    let mut pid = Some(std::process::id());
+    let mut visited = 0;
+
+    while let Some(current_pid) = pid {
+        if visited > MAX_ITERATIONS {
+            return None;
+        }
+
+        let process_info = get_process_info(current_pid)
+            .map_err(|err| {
+                debug!("{}", err);
+                err
+            })
+            .ok()?;
+        let binary = process_info
+            .command
+            .trim_start_matches('-')
+            .split('/')
+            .last()?;
+
+        if let Some(shell) = super::shell_from_string(binary) {
+            return Some(shell);
+        }
+
+        pid = process_info.parent_pid;
+        visited += 1;
+    }
+
+    None
+}
+
+fn get_process_info(pid: u32) -> Result<ProcessInfo, ProcessInfoError> {
+    use std::io::{BufRead, BufReader};
+    use std::process::Command;
+
+    let buffer = Command::new("ps")
+        .arg("-o")
+        .arg("ppid,comm")
+        .arg(pid.to_string())
+        .stdout(std::process::Stdio::piped())
+        .spawn()?
+        .stdout
+        .ok_or_else(|| Error::from(ErrorKind::UnexpectedEof))?;
+
+    let mut lines = BufReader::new(buffer).lines();
+
+    // skip header line
+    lines
+        .next()
+        .ok_or_else(|| Error::from(ErrorKind::UnexpectedEof))??;
+
+    let line = lines
+        .next()
+        .ok_or_else(|| Error::from(ErrorKind::NotFound))??;
+
+    let mut parts = line.split_whitespace();
+    let ppid = parts.next().ok_or_else(|| ProcessInfoError::Parse {
+        expectation: "Can't read the ppid from ps, should be the first item in the table",
+        got: line.to_string(),
+    })?;
+    let command = parts.next().ok_or_else(|| ProcessInfoError::Parse {
+        expectation: "Can't read the command from ps, should be the second item in the table",
+        got: line.to_string(),
+    })?;
+
+    Ok(ProcessInfo {
+        parent_pid: ppid.parse().ok(),
+        command: command.into(),
+    })
+}
+
+#[derive(Debug, Error)]
+enum ProcessInfoError {
+    #[error("Can't read process info: {source}")]
+    Io {
+        #[source]
+        #[from]
+        source: std::io::Error,
+    },
+    #[error("Can't parse process info output. {expectation}. Got: {got}")]
+    Parse {
+        got: String,
+        expectation: &'static str,
+    },
+}
+
+#[cfg(all(test, unix))]
+mod tests {
+    use super::*;
+    use pretty_assertions::assert_eq;
+    use std::process::{Command, Stdio};
+
+    #[test]
+    fn test_get_process_info() -> anyhow::Result<()> {
+        let subprocess = Command::new("bash")
+            .stdin(Stdio::piped())
+            .stdout(Stdio::piped())
+            .stderr(Stdio::piped())
+            .spawn()?;
+        let process_info = get_process_info(subprocess.id());
+        let parent_pid = process_info.ok().and_then(|x| x.parent_pid);
+        assert_eq!(parent_pid, Some(std::process::id()));
+        Ok(())
+    }
+}