Add version filtering option to ls-remote (#190)

Fixes #188

executable/FnmApp.re

@@ -14,7 +14,7 @@ module Commands = {
   let use = (version, quiet) => Use.run(~version, ~quiet) |> runCmd;
   let alias = (version, name) => Alias.run(~name, ~version) |> runCmd;
   let default = version => Alias.run(~name="default", ~version) |> runCmd;
-  let listRemote = () => ListRemote.run() |> runCmd;
+  let listRemote = version => ListRemote.run(~version) |> runCmd;
   let listLocal = () => ListLocal.run() |> runCmd;
   let install = version => Install.run(~version) |> runCmd;
   let uninstall = version => Uninstall.run(~version) |> runCmd;
@@ -146,8 +146,15 @@ let listRemote = {
   let sdocs = Manpage.s_common_options;
   let man = help_secs;
 
+  let selectedVersion = {
+    let doc = "Filter by specific $(docv).";
+    Arg.(
+      value & pos(0, some(string), None) & info([], ~docv="VERSION", ~doc)
+    );
+  };
+
   (
-    Term.(app(const(Commands.listRemote), const())),
+    Term.(const(Commands.listRemote) $ selectedVersion),
     Term.info(
       "ls-remote",
       ~version,

executable/ListRemote.re

@@ -1,26 +1,50 @@
 open Fnm;
 
-let run = () => {
+let run = (~version as maybeVersionName) => {
   Console.log("Looking for some node versions upstream...");
 
   let%lwt versions = Versions.getRemoteVersions()
   and currentVersion = Versions.getCurrentVersion();
 
-  versions
-  |> List.iter(version => {
-       open Versions.Remote;
-       let str = "* " ++ version.name;
-       let color =
-         switch (currentVersion, version.installed) {
-         | (Some({name: currentVersionName, _}), _)
-             when currentVersionName == version.name =>
-           Some(Pastel.Cyan)
-         | (_, true) => Some(Pastel.Green)
-         | (_, false) => None
-         };
+  let versions =
+    switch (maybeVersionName) {
+    | None => versions
+    | Some(versionName) =>
+      let formattedVersionName = Versions.format(versionName);
+      versions
+      |> Versions.(
+           List.filter(v =>
+             isVersionFitsPrefix(formattedVersionName, Remote.(v.name))
+             || v.name == formattedVersionName
+           )
+         );
+    };
 
-       Console.log(<Pastel ?color> str </Pastel>);
-     });
+  switch (versions) {
+  | [] =>
+    Console.log(
+      <Pastel color=Pastel.Red>
+        "No versions found that match your criterias."
+      </Pastel>,
+    );
+    Lwt.return_error(1);
 
-  Lwt.return_ok();
+  | _ =>
+    versions
+    |> List.iter(version => {
+         open Versions.Remote;
+         let str = "* " ++ version.name;
+         let color =
+           switch (currentVersion, version.installed) {
+           | (Some({name: currentVersionName, _}), _)
+               when currentVersionName == version.name =>
+             Some(Pastel.Cyan)
+           | (_, true) => Some(Pastel.Green)
+           | (_, false) => None
+           };
+         ();
+         Console.log(<Pastel ?color> str </Pastel>);
+       });
+    Lwt.return_ok();
+  };
 };

test/TestFnm.re

@@ -1,5 +1,6 @@
 include SmokeTest;
 include TestSemver;
 include TestFs;
+include TestListRemote;
 
 TestFramework.cli();

test/TestListRemote.re

@@ -0,0 +1,116 @@
+open TestFramework;
+
+let allVersions6 = [
+  "v6.0.0",
+  "v6.1.0",
+  "v6.2.0",
+  "v6.2.1",
+  "v6.2.2",
+  "v6.3.0",
+  "v6.3.1",
+  "v6.4.0",
+  "v6.5.0",
+  "v6.6.0",
+  "v6.7.0",
+  "v6.8.0",
+  "v6.8.1",
+  "v6.9.0",
+  "v6.9.1",
+  "v6.9.2",
+  "v6.9.3",
+  "v6.9.4",
+  "v6.9.5",
+  "v6.10.0",
+  "v6.10.1",
+  "v6.10.2",
+  "v6.10.3",
+  "v6.11.0",
+  "v6.11.1",
+  "v6.11.2",
+  "v6.11.3",
+  "v6.11.4",
+  "v6.11.5",
+  "v6.12.0",
+  "v6.12.1",
+  "v6.12.2",
+  "v6.12.3",
+  "v6.13.0",
+  "v6.13.1",
+  "v6.14.0",
+  "v6.14.1",
+  "v6.14.2",
+  "v6.14.3",
+  "v6.14.4",
+  "v6.15.0",
+  "v6.15.1",
+  "v6.16.0",
+  "v6.17.0",
+  "v6.17.1",
+];
+
+let allVersions6_11 = [
+  "v6.11.0",
+  "v6.11.1",
+  "v6.11.2",
+  "v6.11.3",
+  "v6.11.4",
+  "v6.11.5",
+];
+
+describe("List Remote", ({test}) => {
+  let versionRegExp = Str.regexp(".*[0-9]+\.[0-9]+\.[0-9]+\|.*latest-*");
+
+  let filterVersionNumbers = response =>
+    response
+    |> String.split_on_char('\n')
+    |> List.filter(s => Str.string_match(versionRegExp, s, 0))
+    |> List.map(s => Str.replace_first(Str.regexp("\*"), "", s))
+    |> List.map(String.trim);
+
+  let runAndFilterVersionNumbers = args => run(args) |> filterVersionNumbers;
+
+  test("Should display remote versions matching a major version", ({expect}) => {
+    let versionNumbers = runAndFilterVersionNumbers([|"ls-remote", "6"|]);
+
+    expect.lines(versionNumbers).toEqualLines(allVersions6);
+  });
+  test(
+    "Should display remote versions matching a major and minor version",
+    ({expect}) => {
+    let versionNumbers = runAndFilterVersionNumbers([|"ls-remote", "6.11"|]);
+
+    expect.lines(versionNumbers).toEqualLines(allVersions6_11);
+  });
+  test(
+    "Should display remote version matching a specific version", ({expect}) => {
+    let versionNumbers =
+      runAndFilterVersionNumbers([|"ls-remote", "6.11.3"|]);
+
+    expect.int(versionNumbers |> List.length).toBe(1);
+    expect.lines(versionNumbers).toEqual("v6.11.3");
+  });
+  test("Should display latest remote version", ({expect}) => {
+    let versionNumbers =
+      runAndFilterVersionNumbers([|"ls-remote", "latest"|]);
+
+    expect.int(versionNumbers |> List.length).toBe(1);
+    expect.lines(versionNumbers).toEqual("latest");
+  });
+
+  test("Should display latest specific remote version", ({expect}) => {
+    let versionNumbers =
+      runAndFilterVersionNumbers([|"ls-remote", "latest-v6"|]);
+
+    expect.int(versionNumbers |> List.length).toBe(1);
+    expect.lines(versionNumbers).toEqual("latest-v6.x");
+  });
+  test(
+    "Should display an error message if version does not exist", ({expect}) => {
+    let result = run([|"ls-remote", "190385"|]);
+
+    let versionNumbers = result |> filterVersionNumbers;
+
+    expect.int(versionNumbers |> List.length).toBe(0);
+    expect.string(result).toMatch(".*No versions found.*");
+  });
+});