[New] maybe support Windows with WSL, MSYS, Cygwin

.github/workflows/windows-npm.yml

@@ -0,0 +1,106 @@
+name: 'Tests on Windows: `nvm install`'
+
+on: [pull_request, push]
+
+env:
+  NVM_INSTALL_GITHUB_REPO: ${{ github.repository }}
+  NVM_INSTALL_VERSION: ${{ github.sha }}
+
+jobs:
+  node_fail_install:
+    # Default installation does not work due to npm_config_prefix set to C:\npm\prefix
+    name: 'MSYS fail prefix nvm install'
+    runs-on: windows-latest
+    steps:
+      - name: Retrieve nvm
+        shell: bash
+        run: |
+          curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD=script bash
+          . "$HOME/.nvm/nvm.sh"
+          ! nvm install --lts
+  nodes:
+    name: 'MSYS nvm install'
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        npm-node-version:
+          - '--lts'
+          - '--default 12'
+          - '--no-progress 10'
+    steps:
+      - name: Retrieve nvm
+        shell: bash
+        run: |
+          unset npm_config_prefix
+          if [ "${{ matrix.npm-node-version }}" = "--lts" ]; then
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
+          else
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD=script bash
+          fi
+          . "$HOME/.nvm/nvm.sh"
+          nvm install ${{ matrix.npm-node-version }}
+  node_cygwin:
+    name: 'Cygwin nvm install'
+    runs-on: windows-latest
+    steps:
+      - name: Install Cygwin
+        shell: bash
+        run: |
+          export SITE='https://mirror.clarkson.edu/cygwin/'
+          export LOCALDIR="$(pwd)"
+          export ROOTDIR="$USERPROFILE\\cygwin"
+          export PACKAGES='bash,git,curl'
+
+          curl -fsSLo setup-x86_64.exe 'https://cygwin.com/setup-x86_64.exe'
+          ./setup-x86_64.exe --disable-buggy-antivirus -q -s "$SITE" -l "$LOCALDIR" -R "$ROOTDIR" -P "$PACKAGES"
+
+          cat >~/setup.sh <<EOM
+            unset npm_config_prefix
+            export NVM_INSTALL_GITHUB_REPO="$NVM_INSTALL_GITHUB_REPO"
+            export NVM_INSTALL_VERSION="$NVM_INSTALL_VERSION"
+
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
+            . "$HOME/.nvm/nvm.sh"
+            nvm install --lts
+
+            nvm deactivate
+            rm -rf "$HOME/.nvm/nvm.sh"
+
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD=script bash
+            . "$HOME/.nvm/nvm.sh"
+            nvm install 9
+          EOM
+      - name: Retrieve nvm
+        shell: cmd
+        run: |
+          cd %USERPROFILE%\cygwin\bin
+          bash.exe "%USERPROFILE%\setup.sh"
+  wsl_nodes:
+    name: 'WSL nvm install'
+    runs-on: windows-latest
+    env:
+      WSLENV: NVM_INSTALL_GITHUB_REPO:NVM_INSTALL_VERSION:/p
+    strategy:
+      matrix:
+        wsl-distrib:
+          - Debian
+          - Alpine
+          - Ubuntu-18.04
+        npm-node-version:
+          - '--lts'
+          - '11'
+    steps:
+      - uses: Vampire/setup-wsl@v1
+        with:
+          distribution: ${{ matrix.wsl-distrib }}
+          additional-packages: bash git curl ca-certificates
+      - name: Retrieve nvm on WSL
+        shell: wsl-bash {0}
+        run: |
+          if [ "${{ matrix.wsl-distrib }}" = "Ubuntu-18.04" ] && [ "${{ matrix.npm-node-version }}" = "--lts" ]; then
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
+          else
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD=script bash
+          fi
+          . "$HOME/.nvm/nvm.sh"
+          nvm install ${{ matrix.npm-node-version }}

README.md

@@ -152,7 +152,7 @@ which should output `nvm` if the installation was successful. Please note that `
 
 If you're running a system without prepackaged binary available, which means you're going to install nodejs or io.js from its source code, you need to make sure your system has a C++ compiler. For OS X, Xcode will work, for Debian/Ubuntu based GNU/Linux, the `build-essential` and `libssl-dev` packages work.
 
-**Note:** `nvm` does not support Windows (see [#284](https://github.com/nvm-sh/nvm/issues/284)), but may work in WSL (Windows Subsystem for Linux) depending on the version of WSL. For Windows, a few alternatives exist, which are neither supported nor developed by us:
+**Note:** `nvm` also support Windows in some cases. It should work through WSL (Windows Subsystem for Linux) depending on the version of WSL. It should also work with [GitBash](https://gitforwindows.org/) (MSYS) or [Cygwin](https://cygwin.com). Otherwise, for Windows, afew alternatives exist, which are neither supported nor developed by us:
 
   - [nvm-windows](https://github.com/coreybutler/nvm-windows)
   - [nodist](https://github.com/marcelklehr/nodist)

nvm.sh

@@ -146,7 +146,18 @@ nvm_has_system_iojs() {
 }
 
 nvm_is_version_installed() {
-  [ -n "${1-}" ] && [ -x "$(nvm_version_path "$1" 2>/dev/null)"/bin/node ]
+  if [ -z "${1-}" ]; then
+    return 1
+  fi
+  local NVM_NODE_BINARY
+  NVM_NODE_BINARY='node'
+  if [ "_$(nvm_get_os)" = '_win' ]; then
+    NVM_NODE_BINARY='node.exe'
+  fi
+  if [ -x "$(nvm_version_path "$1" 2>/dev/null)/bin/${NVM_NODE_BINARY}" ]; then
+    return 0
+  fi
+  return 1
 }
 
 nvm_print_npm_version() {
@@ -326,10 +337,14 @@ nvm_tree_contains_path() {
     return 2
   fi
 
+  local previous_pathdir
+  previous_pathdir="${node_path}"
   local pathdir
-  pathdir=$(dirname "${node_path}")
+  pathdir=$(dirname "${previous_pathdir}")
-  while [ "${pathdir}" != "" ] && [ "${pathdir}" != "." ] && [ "${pathdir}" != "/" ] && [ "${pathdir}" != "${tree}" ]; do
+  while [ "${pathdir}" != '' ] && [ "${pathdir}" != '.' ] && [ "${pathdir}" != '/' ] &&
-    pathdir=$(dirname "${pathdir}")
+      [ "${pathdir}" != "${tree}" ] && [ "${pathdir}" != "${previous_pathdir}" ]; do
+    previous_pathdir="${pathdir}"
+    pathdir=$(dirname "${previous_pathdir}")
   done
   [ "${pathdir}" = "${tree}" ]
 }
@@ -1763,6 +1778,7 @@ nvm_get_os() {
     FreeBSD\ *) NVM_OS=freebsd ;;
     OpenBSD\ *) NVM_OS=openbsd ;;
     AIX\ *) NVM_OS=aix ;;
+    CYGWIN* | MSYS* | MINGW*) NVM_OS=win ;;
   esac
   nvm_echo "${NVM_OS-}"
 }
@@ -1892,6 +1908,12 @@ nvm_install_binary_extract() {
   command mkdir -p "${TMPDIR}" && \
   VERSION_PATH="$(nvm_version_path "${PREFIXED_VERSION}")" || return 1
 
+  # For Windows system (GitBash with MSYS, Cygwin)
+  if [ "${NVM_OS}" = 'win' ]; then
+    VERSION_PATH="${VERSION_PATH}/bin"
+    command unzip -q "${TARBALL}" -d "${TMPDIR}" || return 1
+  # For non Windows system (including WSL running on Windows)
+  else
     local tar_compression_flag
     tar_compression_flag='z'
     if nvm_supports_xz "${VERSION}"; then
@@ -1905,10 +1927,18 @@ nvm_install_binary_extract() {
       tar='tar'
     fi
     command "${tar}" -x${tar_compression_flag}f "${TARBALL}" -C "${TMPDIR}" --strip-components 1 || return 1
+  fi
 
   command mkdir -p "${VERSION_PATH}" || return 1
 
+  if [ "${NVM_OS}" = 'win' ]; then
+    command mv "${TMPDIR}/"*/* "${VERSION_PATH}" || return 1
+    command chmod +x "${VERSION_PATH}"/node.exe || return 1
+    command chmod +x "${VERSION_PATH}"/npm || return 1
+    command chmod +x "${VERSION_PATH}"/npx 2>/dev/null
+  else
     command mv "${TMPDIR}/"* "${VERSION_PATH}" || return 1
+  fi
 
   command rm -rf "${TMPDIR}"
 
@@ -2042,7 +2072,9 @@ nvm_get_artifact_compression() {
 
   local COMPRESSION
   COMPRESSION='tar.gz'
-  if nvm_supports_xz "${VERSION}"; then
+  if [ "_${NVM_OS}" = '_win' ]; then
+    COMPRESSION='zip'
+  elif nvm_supports_xz "${VERSION}"; then
     COMPRESSION='tar.xz'
   fi
 
@@ -2409,6 +2441,9 @@ nvm_die_on_prefix() {
     return 3
   fi
 
+  local NVM_OS
+  NVM_OS="$(nvm_get_os)"
+
   # npm normalizes NPM_CONFIG_-prefixed env vars
   # https://github.com/npm/npmconf/blob/22827e4038d6eebaafeb5c13ed2b92cf97b8fb82/npmconf.js#L331-L348
   # https://github.com/npm/npm/blob/5e426a78ca02d0044f8dd26e0c5f881217081cbd/lib/config/core.js#L343-L359
@@ -2420,6 +2455,9 @@ nvm_die_on_prefix() {
   if [ -n "${NVM_NPM_CONFIG_PREFIX_ENV-}" ]; then
     local NVM_CONFIG_VALUE
     eval "NVM_CONFIG_VALUE=\"\$${NVM_NPM_CONFIG_PREFIX_ENV}\""
+    if [ -n "${NVM_CONFIG_VALUE-}" ] && [ "_${NVM_OS}" = "_win" ]; then
+      NVM_CONFIG_VALUE="$(cd "$NVM_CONFIG_VALUE" 2>/dev/null && pwd)"
+    fi
     if [ -n "${NVM_CONFIG_VALUE-}" ] && ! nvm_tree_contains_path "${NVM_DIR}" "${NVM_CONFIG_VALUE}"; then
       nvm deactivate >/dev/null 2>&1
       nvm_err "nvm is not compatible with the \"${NVM_NPM_CONFIG_PREFIX_ENV}\" environment variable: currently set to \"${NVM_CONFIG_VALUE}\""
@@ -3209,9 +3247,14 @@ nvm() {
             nvm_get_make_jobs
           fi
 
+          if [ "_${NVM_OS}" = "_win" ]; then
+            nvm_err 'Installing from source on non-WSL Windows is not supported'
+            EXIT_CODE=87
+          else
             NVM_NO_PROGRESS="${NVM_NO_PROGRESS:-${noprogress}}" nvm_install_source "${FLAVOR}" std "${VERSION}" "${NVM_MAKE_JOBS}" "${ADDITIONAL_PARAMETERS}"
             EXIT_CODE=$?
           fi
+        fi
 
       fi
 

test/fast/Unit tests/nvm_get_artifact_compression

@@ -13,4 +13,10 @@ die () { echo "$@" ; cleanup ; exit 1; }
 # nvm_get_artifact_compression with xz
 [ "$(nvm_get_artifact_compression "14.0.0")" = 'tar.xz' ] || die 'nvm_get_artifact_compression should return "tar.xz" for this version'
 
+# nvm_get_artifact_compression with zip on Windows
+nvm_get_os() {
+  nvm_echo 'win'
+}
+[ "$(nvm_get_artifact_compression)" = 'zip' ] || die 'nvm_get_artifact_compression should return "zip" for Windows'
+
 cleanup

test/fast/Unit tests/nvm_install_binary_extract

@@ -43,6 +43,9 @@ if [ -z "$NVM_DIR" ] || [ -z "$tmp_dir" ]; then
   die 'Unable to create temporary folder'
 fi
 
+# Test windows zip
+test_archi 'win' 'v15.6.0' 'x64' 'node' 'zip' 'zip' '-qr'
+
 # Test linux tar.xz
 test_archi 'linux' 'v14.15.4' 'x64' 'bin/node' 'tar.xz' 'tar' '-cJf'
 

test/fast/Unit tests/nvm_is_version_installed

@@ -2,7 +2,7 @@
 
 cleanup () {
   rm -rf "$NVM_DIR"
-  unset -f die cleanup check_version
+  unset -f die cleanup nvm_get_os check_version
   unset NVM_DIR NODE_PATH
 }
 die () { echo "$@" ; cleanup ; exit 1; }
@@ -44,4 +44,11 @@ type nvm_is_version_installed > /dev/null 2>&1 || die 'nvm_is_version_installed
 
 check_version '12.0.0' 'node'
 
+# Checking for Windows
+nvm_get_os() {
+  echo "win"
+}
+check_version '13.0.0' 'node.exe'
+
+
 cleanup