feat(env): installing the latest Node.js version (#3879)

ref https://github.com/pnpm/pnpm/discussions/3857

.changeset/smart-crabs-attend.md

@@ -0,0 +1,5 @@
+---
+"@pnpm/plugin-commands-env": minor
+---
+
+Allow to install the latest Node.js version by running `pnpm env use -g latest`.

packages/plugin-commands-env/src/env.ts

@@ -43,6 +43,7 @@ export function help () {
       'pnpm env use --global 16',
       'pnpm env use --global lts',
       'pnpm env use --global argon',
+      'pnpm env use --global latest',
     ],
   })
 }
@@ -105,6 +106,9 @@ interface NodeVersion {
 async function resolveNodeVersion (rawVersionSelector: string) {
   const response = await fetch('https://nodejs.org/download/release/index.json')
   const allVersions = (await response.json()) as NodeVersion[]
+  if (rawVersionSelector === 'latest') {
+    return allVersions[0].version.substring(1)
+  }
   const { versions, versionSelector } = filterVersions(allVersions, rawVersionSelector)
   const pickedVersion = semver.maxSatisfying(versions.map(({ version }) => version), versionSelector)
   if (!pickedVersion) return null

packages/plugin-commands-env/test/env.test.ts

@@ -112,6 +112,24 @@ test('install Node by its LTS name', async () => {
   expect(dirs).toEqual([version.substring(1)])
 })
 
+test('install the latest Node.js', async () => {
+  tempDir()
+
+  await env.handler({
+    bin: process.cwd(),
+    global: true,
+    pnpmHomeDir: process.cwd(),
+    rawConfig: {},
+  }, ['use', 'latest'])
+
+  const { stdout } = execa.sync('node', ['-v'], {
+    env: {
+      [PATH]: `${process.cwd()}${path.delimiter}${process.env[PATH] as string}`,
+    },
+  })
+  expect(stdout.toString()).toMatch(/^v/)
+})
+
 test('fail if a non-existend Node.js version is tried to be installed', async () => {
   tempDir()