Add TruffleRuby 20.2.0

* eslint has been removed.

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         os: [ ubuntu-16.04, ubuntu-18.04, ubuntu-20.04, macos-10.15, windows-2016, windows-2019 ]
         # Use various version syntax here for testing
-        ruby: [ 2.2, 2.3, 2.4, 2.5, 2.6.6, 2.7, ruby-head, debug, jruby-9.1, jruby, jruby-head, truffleruby, truffleruby-head ]
+        ruby: [ 2.1, 2.2, 2.3, 2.4, 2.5, 2.6.6, 2.7, ruby-head, debug, jruby-9.1, jruby, jruby-head, truffleruby, truffleruby-head ]
         include:
         - { os: ubuntu-18.04, ruby: rubinius }
         - { os: windows-2016, ruby: mingw }

README.md

@@ -14,9 +14,9 @@ This action currently supports these versions of MRI, JRuby and TruffleRuby:
 
 | Interpreter | Versions |
 | ----------- | -------- |
-| Ruby | 2.2, 2.3.0 - 2.3.8, 2.4.0 - 2.4.10, 2.5.0 - 2.5.8, 2.6.0 - 2.6.6, 2.7.1, head, debug, mingw, mswin |
-| JRuby | 9.1.17.0, 9.2.9.0 - 9.2.11.1, head |
-| TruffleRuby | 19.3.0 - 20.1.0, head |
+| Ruby | 2.1.9, 2.2, 2.3.0 - 2.3.8, 2.4.0 - 2.4.10, 2.5.0 - 2.5.8, 2.6.0 - 2.6.6, 2.7.1, head, debug, mingw, mswin |
+| JRuby | 9.1.17.0, 9.2.9.0 - 9.2.13.0, head |
+| TruffleRuby | 19.3.0 - 20.2.0, head |
 | Rubinius | 4.14 |
 
 `ruby-debug` is the same as `ruby-head` but with assertions enabled (`-DRUBY_DEBUG=1`).  
@@ -31,7 +31,7 @@ On Windows, Ruby 2.4 uses OpenSSL 1.0.2, which is no longer maintained.
 
 ### Supported Platforms
 
-The action works for all [GitHub-hosted runners](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/virtual-environments-for-github-hosted-runners).
+The action works for all [GitHub-hosted runners](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/virtual-environments-for-github-hosted-runners), and [self-hosted runners](https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners), under [certain conditions](#limitations)
 
 | Operating System | Recommended | Other Supported Versions |
 | ----------- | -------- | -------- |
@@ -108,11 +108,16 @@ and the [condition and expression syntax](https://help.github.com/en/actions/ref
 * `.tool-versions` reads from the project's `.tool-versions` file
 * If the `ruby-version` input is not specified, `.ruby-version` is tried first, followed by `.tool-versions`
 
+### Working Directory
+
+The `working-directory` input can be set to resolve `.ruby-version`, `.tool-versions` and `Gemfile.lock`
+if they are not at the root of the repository, see [action.yml](action.yml) for details.
+
 ### Bundler
 
-By default, if there is a `Gemfile.lock` file with a `BUNDLED WITH` section,
+By default, if there is a `Gemfile.lock` file (or `$BUNDLE_GEMFILE.lock` if `$BUNDLE_GEMFILE` is set) with a `BUNDLED WITH` section,
 the latest version of Bundler with the same major version will be installed.
-Otherwise, the latest Bundler version is installed (except for Ruby 2.2 and 2.3 where only Bundler 1 is supported).
+Otherwise, the latest compatible Bundler version is installed (Bundler 2 on Ruby >= 2.4, Bundler 1 on Ruby < 2.4).
 
 This behavior can be customized, see [action.yml](action.yml) for details about the `bundler` input.
 
@@ -126,10 +131,10 @@ This action provides a way to automatically run `bundle install` and cache the r
 ```
 
 This caching speeds up installing gems significantly and avoids too many requests to RubyGems.org.  
-It needs a `Gemfile` under the [`working-directory`](#working-directory).  
+It needs a `Gemfile` (or `$BUNDLE_GEMFILE`) under the [`working-directory`](#working-directory).  
 The caching works whether there is a `Gemfile.lock` or not.
 If there is a `Gemfile.lock`, `bundle config --local deployment true` is used.
-  
+
 To perform caching, this action will use `bundle config --local path vendor/bundle`.  
 Therefore, the Bundler `path` should not be changed in your workflow for the cache to work.
 
@@ -159,15 +164,9 @@ When using `.ruby-version`, replace `${{ matrix.ruby }}` with `${{ hashFiles('.r
 When using `.tool-versions`, replace `${{ matrix.ruby }}` with `${{ hashFiles('.tool-versions') }}`.
 
 This uses the [cache action](https://github.com/actions/cache).
-The code above is a more complete version of the [Ruby - Bundler example](https://github.com/actions/cache/blob/master/examples.md#ruby---\
-bundler).
+The code above is a more complete version of the [Ruby - Bundler example](https://github.com/actions/cache/blob/master/examples.md#ruby---bundler).
 Make sure to include `use-ruby` in the `key` to avoid conflicting with previous caches.
 
-### Working Directory
-
-The `working-directory` input can be set to resolve `.ruby-version`, `.tool-versions` and `Gemfile.lock`
-if they are not at the root of the repository, see [action.yml](action.yml) for details.
-
 ## Windows
 
 Note that running CI on Windows can be quite challenging if you are not very familiar with Windows.
@@ -192,9 +191,11 @@ Make sure to always use the latest release before reporting an issue on GitHub.
 This action follows semantic versioning with a moving `v1` branch.
 This follows the [recommendations](https://github.com/actions/toolkit/blob/master/docs/action-versioning.md) of GitHub Actions.
 
-## Limitations
+## Using self-hosted runners
+You must meet the following parameters to use this action with self-hosted runners:
 
-* This action currently only works with GitHub-hosted runners, not private runners.
+* Make sure that the operating system has `libyaml-0` installed
+* The runner software is running as user `runner` with a home directory of `/home/runner`, or you have created a symlink for the home directory of whatever user that the runner is running as to `/home/runner`.
 
 ## History
 

action.yml

@@ -10,7 +10,10 @@ inputs:
     required: false
     default: 'default'
   bundler:
-    description: 'The version of Bundler to install. Either none, 1, 2, latest or Gemfile.lock. The default tries Gemfile.lock and otherwise uses latest.'
+    description: |
+      The version of Bundler to install. Either 'none', 1, 2, 'latest' or 'Gemfile.lock'.
+      For 'Gemfile.lock', the version is determined based on the BUNDLED WITH section from the file ($BUNDLE_GEMFILE || Gemfile).lock.
+      Defaults to 'Gemfile.lock' if it exists and 'latest' otherwise.
     required: false
     default: 'default'
   bundler-cache:

dist/index.js

@@ -2199,20 +2199,23 @@ const inputDefaults = {
   'working-directory': '.',
 }
 
+// entry point when this action is run on its own
 async function run() {
   try {
-    const options = {}
-    for (const key in inputDefaults) {
-      options[key] = core.getInput(key)
-    }
-    await setupRuby(options)
+    await setupRuby()
   } catch (error) {
     core.setFailed(error.message)
   }
 }
 
-async function setupRuby(options) {
-  const inputs = { ...inputDefaults, ...options }
+// entry point when this action is run from other actions
+async function setupRuby(options = {}) {
+  const inputs = { ...options }
+  for (const key in inputDefaults) {
+    if (!inputs.hasOwnProperty(key)) {
+      inputs[key] = core.getInput(key) || inputDefaults[key]
+    }
+  }
 
   process.chdir(inputs['working-directory'])
 
@@ -2235,6 +2238,13 @@ async function setupRuby(options) {
 
   setupPath(newPathEntries)
 
+  // When setup-ruby is used by other actions, this allows code in them to run
+  // before 'bundle install'.  Installed dependencies may require additional
+  // libraries & headers, build tools, etc.
+  if (inputs['afterSetupPathHook'] instanceof Function) {
+    await inputs['afterSetupPathHook']({ platform, rubyPrefix, engine, version })
+  }
+
   if (inputs['bundler'] !== 'none') {
     await common.measure('Installing Bundler', async () =>
       installBundler(inputs['bundler'], platform, rubyPrefix, engine, version))
@@ -2329,9 +2339,9 @@ function setupPath(newPathEntries) {
   core.exportVariable('PATH', [...newPathEntries, ...cleanPath].join(path.delimiter))
 }
 
-function readBundledWithFromGemfileLock() {
-  if (fs.existsSync('Gemfile.lock')) {
-    const contents = fs.readFileSync('Gemfile.lock', 'utf8')
+function readBundledWithFromGemfileLock(path) {
+  if (fs.existsSync(path)) {
+    const contents = fs.readFileSync(path, 'utf8')
     const lines = contents.split(/\r?\n/)
     const bundledWithLine = lines.findIndex(line => /^BUNDLED WITH$/.test(line.trim()))
     if (bundledWithLine !== -1) {
@@ -2339,7 +2349,7 @@ function readBundledWithFromGemfileLock() {
       if (nextLine && /^\d+/.test(nextLine.trim())) {
         const bundlerVersion = nextLine.trim()
         const majorVersion = bundlerVersion.match(/^\d+/)[0]
-        console.log(`Using Bundler ${majorVersion} from Gemfile.lock BUNDLED WITH ${bundlerVersion}`)
+        console.log(`Using Bundler ${majorVersion} from ${path} BUNDLED WITH ${bundlerVersion}`)
         return majorVersion
       }
     }
@@ -2351,7 +2361,8 @@ async function installBundler(bundlerVersionInput, platform, rubyPrefix, engine,
   var bundlerVersion = bundlerVersionInput
 
   if (bundlerVersion === 'default' || bundlerVersion === 'Gemfile.lock') {
-    bundlerVersion = readBundledWithFromGemfileLock()
+    const gemfilePath = `${process.env['BUNDLE_GEMFILE'] || 'Gemfile'}.lock`
+    bundlerVersion = readBundledWithFromGemfileLock(gemfilePath)
     if (!bundlerVersion) {
       bundlerVersion = 'latest'
     }
@@ -2367,8 +2378,8 @@ async function installBundler(bundlerVersionInput, platform, rubyPrefix, engine,
     throw new Error(`Cannot parse bundler input: ${bundlerVersion}`)
   }
 
-  if (rubyVersion.startsWith('2.2')) {
-    console.log('Bundler 2 requires Ruby 2.3+, using Bundler 1 on Ruby 2.2')
+  if (rubyVersion.match(/^2\.[12]/)) {
+    console.log('Bundler 2 requires Ruby 2.3+, using Bundler 1 on Ruby <= 2.2')
     bundlerVersion = '1'
   } else if (rubyVersion.startsWith('2.3')) {
     console.log('Ruby 2.3 has a bug with Bundler 2 (https://github.com/rubygems/rubygems/issues/3570), using Bundler 1 instead on Ruby 2.3')
@@ -2417,7 +2428,17 @@ async function bundleInstall(platform, engine, version) {
   console.log(`Cache key: ${key}`)
 
   // restore cache & install
-  const cachedKey = await cache.restoreCache(paths, key, restoreKeys)
+  let cachedKey = null
+  try {
+    cachedKey = await cache.restoreCache(paths, key, restoreKeys)
+  } catch (error) {
+    if (error.name === cache.ValidationError.name) {
+      throw error;
+    } else {
+      core.info(`[warning] There was an error restoring the cache ${error.message}`)
+    }
+  }
+
   if (cachedKey) {
     console.log(`Found cache for key: ${cachedKey}`)
   }
@@ -2449,7 +2470,7 @@ async function bundleInstall(platform, engine, version) {
 
 async function computeBaseKey(platform, engine, version) {
   let baseKey = `setup-ruby-bundle-install-${platform}-${engine}-${version}`
-  if (engine === 'ruby' && common.isHeadVersion(version)) {
+  if (engine !== 'jruby' && common.isHeadVersion(version)) {
     let revision = '';
     await exec.exec('ruby', ['-e', 'print RUBY_REVISION'], {
       silent: true,
@@ -3073,6 +3094,7 @@ __webpack_require__.r(__webpack_exports__);
 function getVersions(platform) {
   const versions = {
     "ruby": [
+      "2.1.9",
       "2.2.10",
       "2.3.0", "2.3.1", "2.3.2", "2.3.3", "2.3.4", "2.3.5", "2.3.6", "2.3.7", "2.3.8",
       "2.4.0", "2.4.1", "2.4.2", "2.4.3", "2.4.4", "2.4.5", "2.4.6", "2.4.7", "2.4.9", "2.4.10",
@@ -3083,12 +3105,12 @@ function getVersions(platform) {
     ],
     "jruby": [
       "9.1.17.0",
-      "9.2.9.0", "9.2.10.0", "9.2.11.0", "9.2.11.1",
+      "9.2.9.0", "9.2.10.0", "9.2.11.0", "9.2.11.1", "9.2.12.0", "9.2.13.0",
       "head"
     ],
     "truffleruby": [
       "19.3.0", "19.3.1",
-      "20.0.0", "20.1.0",
+      "20.0.0", "20.1.0", "20.2.0",
       "head"
     ]
   }
@@ -5903,6 +5925,7 @@ exports.getState = getState;
 __webpack_require__.r(__webpack_exports__);
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "versions", function() { return versions; });
 const versions = {
+  "2.1.9": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.1.9-x64-mingw32.7z",
   "2.2.6": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.2.6-x64-mingw32.7z",
   "2.3.0": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.3.0-x64-mingw32.7z",
   "2.3.1": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.3.1-x64-mingw32.7z",
@@ -7529,14 +7552,14 @@ const rubyInstallerVersions = __webpack_require__(471).versions
 // Extract to SSD, see https://github.com/ruby/setup-ruby/pull/14
 const drive = (process.env['GITHUB_WORKSPACE'] || 'C')[0]
 
-// needed for 2.2, 2.3, and mswin, cert file used by Git for Windows
+// needed for 2.1, 2.2, 2.3, and mswin, cert file used by Git for Windows
 const certFile = 'C:\\Program Files\\Git\\mingw64\\ssl\\cert.pem'
 
 // standard MSYS2 location, found by 'devkit.rb'
 const msys2 = 'C:\\msys64'
 const msys2PathEntries = [`${msys2}\\mingw64\\bin`, `${msys2}\\usr\\bin`]
 
-// location & path for old RubyInstaller DevKit (MSYS), Ruby 2.2 and 2.3
+// location & path for old RubyInstaller DevKit (MSYS), Ruby 2.1, 2.2 and 2.3
 const msys = `${drive}:\\DevKit64`
 const msysPathEntries = [`${msys}\\mingw\\x86_64-w64-mingw32\\bin`,
   `${msys}\\mingw\\bin`, `${msys}\\bin`]
@@ -7589,7 +7612,7 @@ async function symLinkToEmbeddedMSYS2() {
 async function setupMingw(version) {
   core.exportVariable('MAKE', 'make.exe')
 
-  if (version.startsWith('2.2') || version.startsWith('2.3')) {
+  if (version.match(/^2\.[123]/)) {
     core.exportVariable('SSL_CERT_FILE', certFile)
     await common.measure('Installing MSYS1', async () =>
       installMSYS(version))
@@ -7605,7 +7628,7 @@ async function setupMingw(version) {
   }
 }
 
-// Ruby 2.2 and 2.3
+// Ruby 2.1, 2.2 and 2.3
 async function installMSYS(version) {
   const url = 'https://dl.bintray.com/oneclick/rubyinstaller/DevKit-mingw64-64-4.7.2-20130224-1432-sfx.exe'
   const downloadPath = await tc.downloadTool(url)

generate-windows-versions.rb

@@ -2,7 +2,8 @@ require 'net/http'
 require 'yaml'
 require 'json'
 
-min_version = '2.2.6'
+min_requirements = ['~> 2.1.9', '>= 2.2.6'].map { |req| Gem::Requirement.new(req) }
+
 url = 'https://raw.githubusercontent.com/oneclick/rubyinstaller.org-website/master/_data/downloads.yaml'
 entries = YAML.load(Net::HTTP.get(URI(url)), symbolize_names: true)
 
@@ -19,7 +20,7 @@ versions = entries.select { |entry|
 }.sort_by { |version, entry|
   Gem::Version.new(version)
 }.select { |version, entry|
-  Gem::Version.new(version) >= Gem::Version.new(min_version)
+  min_requirements.any? { |req| req.satisfied_by?(Gem::Version.new(version)) }
 }.map { |version, entry|
   [version, entry[:href]]
 }.to_h

index.js

@@ -13,20 +13,23 @@ const inputDefaults = {
   'working-directory': '.',
 }
 
+// entry point when this action is run on its own
 export async function run() {
   try {
-    const options = {}
-    for (const key in inputDefaults) {
-      options[key] = core.getInput(key)
-    }
-    await setupRuby(options)
+    await setupRuby()
   } catch (error) {
     core.setFailed(error.message)
   }
 }
 
-export async function setupRuby(options) {
-  const inputs = { ...inputDefaults, ...options }
+// entry point when this action is run from other actions
+export async function setupRuby(options = {}) {
+  const inputs = { ...options }
+  for (const key in inputDefaults) {
+    if (!inputs.hasOwnProperty(key)) {
+      inputs[key] = core.getInput(key) || inputDefaults[key]
+    }
+  }
 
   process.chdir(inputs['working-directory'])
 
@@ -49,6 +52,13 @@ export async function setupRuby(options) {
 
   setupPath(newPathEntries)
 
+  // When setup-ruby is used by other actions, this allows code in them to run
+  // before 'bundle install'.  Installed dependencies may require additional
+  // libraries & headers, build tools, etc.
+  if (inputs['afterSetupPathHook'] instanceof Function) {
+    await inputs['afterSetupPathHook']({ platform, rubyPrefix, engine, version })
+  }
+
   if (inputs['bundler'] !== 'none') {
     await common.measure('Installing Bundler', async () =>
       installBundler(inputs['bundler'], platform, rubyPrefix, engine, version))
@@ -143,9 +153,9 @@ function setupPath(newPathEntries) {
   core.exportVariable('PATH', [...newPathEntries, ...cleanPath].join(path.delimiter))
 }
 
-function readBundledWithFromGemfileLock() {
-  if (fs.existsSync('Gemfile.lock')) {
-    const contents = fs.readFileSync('Gemfile.lock', 'utf8')
+function readBundledWithFromGemfileLock(path) {
+  if (fs.existsSync(path)) {
+    const contents = fs.readFileSync(path, 'utf8')
     const lines = contents.split(/\r?\n/)
     const bundledWithLine = lines.findIndex(line => /^BUNDLED WITH$/.test(line.trim()))
     if (bundledWithLine !== -1) {
@@ -153,7 +163,7 @@ function readBundledWithFromGemfileLock() {
       if (nextLine && /^\d+/.test(nextLine.trim())) {
         const bundlerVersion = nextLine.trim()
         const majorVersion = bundlerVersion.match(/^\d+/)[0]
-        console.log(`Using Bundler ${majorVersion} from Gemfile.lock BUNDLED WITH ${bundlerVersion}`)
+        console.log(`Using Bundler ${majorVersion} from ${path} BUNDLED WITH ${bundlerVersion}`)
         return majorVersion
       }
     }
@@ -165,7 +175,8 @@ async function installBundler(bundlerVersionInput, platform, rubyPrefix, engine,
   var bundlerVersion = bundlerVersionInput
 
   if (bundlerVersion === 'default' || bundlerVersion === 'Gemfile.lock') {
-    bundlerVersion = readBundledWithFromGemfileLock()
+    const gemfilePath = `${process.env['BUNDLE_GEMFILE'] || 'Gemfile'}.lock`
+    bundlerVersion = readBundledWithFromGemfileLock(gemfilePath)
     if (!bundlerVersion) {
       bundlerVersion = 'latest'
     }
@@ -181,8 +192,8 @@ async function installBundler(bundlerVersionInput, platform, rubyPrefix, engine,
     throw new Error(`Cannot parse bundler input: ${bundlerVersion}`)
   }
 
-  if (rubyVersion.startsWith('2.2')) {
-    console.log('Bundler 2 requires Ruby 2.3+, using Bundler 1 on Ruby 2.2')
+  if (rubyVersion.match(/^2\.[12]/)) {
+    console.log('Bundler 2 requires Ruby 2.3+, using Bundler 1 on Ruby <= 2.2')
     bundlerVersion = '1'
   } else if (rubyVersion.startsWith('2.3')) {
     console.log('Ruby 2.3 has a bug with Bundler 2 (https://github.com/rubygems/rubygems/issues/3570), using Bundler 1 instead on Ruby 2.3')
@@ -231,7 +242,17 @@ async function bundleInstall(platform, engine, version) {
   console.log(`Cache key: ${key}`)
 
   // restore cache & install
-  const cachedKey = await cache.restoreCache(paths, key, restoreKeys)
+  let cachedKey = null
+  try {
+    cachedKey = await cache.restoreCache(paths, key, restoreKeys)
+  } catch (error) {
+    if (error.name === cache.ValidationError.name) {
+      throw error;
+    } else {
+      core.info(`[warning] There was an error restoring the cache ${error.message}`)
+    }
+  }
+
   if (cachedKey) {
     console.log(`Found cache for key: ${cachedKey}`)
   }
@@ -263,7 +284,7 @@ async function bundleInstall(platform, engine, version) {
 
 async function computeBaseKey(platform, engine, version) {
   let baseKey = `setup-ruby-bundle-install-${platform}-${engine}-${version}`
-  if (engine === 'ruby' && common.isHeadVersion(version)) {
+  if (engine !== 'jruby' && common.isHeadVersion(version)) {
     let revision = '';
     await exec.exec('ruby', ['-e', 'print RUBY_REVISION'], {
       silent: true,

package.json

@@ -4,7 +4,6 @@
   "description": "Download a prebuilt Ruby and add it to the PATH in 5 seconds",
   "main": "index.js",
   "scripts": {
-    "lint": "eslint *.js",
     "package": "ncc build index.js -o dist"
   },
   "repository": {

ruby-builder-versions.js

@@ -1,6 +1,7 @@
 export function getVersions(platform) {
   const versions = {
     "ruby": [
+      "2.1.9",
       "2.2.10",
       "2.3.0", "2.3.1", "2.3.2", "2.3.3", "2.3.4", "2.3.5", "2.3.6", "2.3.7", "2.3.8",
       "2.4.0", "2.4.1", "2.4.2", "2.4.3", "2.4.4", "2.4.5", "2.4.6", "2.4.7", "2.4.9", "2.4.10",
@@ -11,12 +12,12 @@ export function getVersions(platform) {
     ],
     "jruby": [
       "9.1.17.0",
-      "9.2.9.0", "9.2.10.0", "9.2.11.0", "9.2.11.1",
+      "9.2.9.0", "9.2.10.0", "9.2.11.0", "9.2.11.1", "9.2.12.0", "9.2.13.0",
       "head"
     ],
     "truffleruby": [
       "19.3.0", "19.3.1",
-      "20.0.0", "20.1.0",
+      "20.0.0", "20.1.0", "20.2.0",
       "head"
     ]
   }

versions-strings-for-builder.rb

@@ -3,6 +3,7 @@ versions = eval hash
 
 by_minor = versions[:ruby].group_by { |v| v[/^\d\.\d/] }
 
+p by_minor['2.1']
 p by_minor['2.2']
 p by_minor['2.3']
 

windows-versions.js

@@ -1,4 +1,5 @@
 export const versions = {
+  "2.1.9": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.1.9-x64-mingw32.7z",
   "2.2.6": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.2.6-x64-mingw32.7z",
   "2.3.0": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.3.0-x64-mingw32.7z",
   "2.3.1": "https://dl.bintray.com/oneclick/rubyinstaller/ruby-2.3.1-x64-mingw32.7z",

windows.js

@@ -13,14 +13,14 @@ const rubyInstallerVersions = require('./windows-versions').versions
 // Extract to SSD, see https://github.com/ruby/setup-ruby/pull/14
 const drive = (process.env['GITHUB_WORKSPACE'] || 'C')[0]
 
-// needed for 2.2, 2.3, and mswin, cert file used by Git for Windows
+// needed for 2.1, 2.2, 2.3, and mswin, cert file used by Git for Windows
 const certFile = 'C:\\Program Files\\Git\\mingw64\\ssl\\cert.pem'
 
 // standard MSYS2 location, found by 'devkit.rb'
 const msys2 = 'C:\\msys64'
 const msys2PathEntries = [`${msys2}\\mingw64\\bin`, `${msys2}\\usr\\bin`]
 
-// location & path for old RubyInstaller DevKit (MSYS), Ruby 2.2 and 2.3
+// location & path for old RubyInstaller DevKit (MSYS), Ruby 2.1, 2.2 and 2.3
 const msys = `${drive}:\\DevKit64`
 const msysPathEntries = [`${msys}\\mingw\\x86_64-w64-mingw32\\bin`,
   `${msys}\\mingw\\bin`, `${msys}\\bin`]
@@ -73,7 +73,7 @@ async function symLinkToEmbeddedMSYS2() {
 async function setupMingw(version) {
   core.exportVariable('MAKE', 'make.exe')
 
-  if (version.startsWith('2.2') || version.startsWith('2.3')) {
+  if (version.match(/^2\.[123]/)) {
     core.exportVariable('SSL_CERT_FILE', certFile)
     await common.measure('Installing MSYS1', async () =>
       installMSYS(version))
@@ -89,7 +89,7 @@ async function setupMingw(version) {
   }
 }
 
-// Ruby 2.2 and 2.3
+// Ruby 2.1, 2.2 and 2.3
 async function installMSYS(version) {
   const url = 'https://dl.bintray.com/oneclick/rubyinstaller/DevKit-mingw64-64-4.7.2-20130224-1432-sfx.exe'
   const downloadPath = await tc.downloadTool(url)