Set BUNDLER_VERSION whenever we know which version to use

* Fixes https://github.com/ruby/setup-ruby/issues/845

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
       GH_TOKEN: ${{ github.token }}
       GH_REPO: ${{ github.repository }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - uses: ./

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-22.04, ubuntu-24.04, ubuntu-22.04-arm, ubuntu-24.04-arm, macos-13, macos-14, macos-15, macos-15-intel, windows-2022, windows-2025, windows-11-arm ]
+        os: [ ubuntu-22.04, ubuntu-24.04, ubuntu-22.04-arm, ubuntu-24.04-arm, macos-14, macos-15, macos-15-intel, windows-2022, windows-2025, windows-11-arm ]
         ruby: [
           '1.9', '2.0', '2.1', '2.2', '2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4', '4.0', ruby-head,
           jruby-9.4, jruby, jruby-head,
@@ -100,7 +100,7 @@ jobs:
     name: ${{ matrix.os }} ${{ matrix.ruby }}
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - uses: ./
       with:
@@ -206,7 +206,7 @@ jobs:
     name: "Test .ruby-version"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: echo "ruby-3.4.0" > .ruby-version
       - uses: ./
       - run: ruby -v | grep -F "ruby 3.4.0"
@@ -215,7 +215,7 @@ jobs:
     name: "Test .tool-versions"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: echo -e "nodejs 16.0.0\nruby   3.4.0" > .tool-versions
       - uses: ./
       - run: ruby -v | grep -F "ruby 3.4.0"
@@ -224,7 +224,7 @@ jobs:
     name: "Test mise.toml"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: echo -e "[tools]\nnode = '18'\nruby = '3.4.0'" > mise.toml
       - uses: ./
       - run: ruby -v | grep -F "ruby 3.4.0"
@@ -233,7 +233,7 @@ jobs:
     name: "Test with no Gemfile"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: rm Gemfile
       - uses: ./
         with:
@@ -244,7 +244,7 @@ jobs:
     name: "Test with no Gemfile but with bundler-cache"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: rm Gemfile
       - uses: ./
         with:
@@ -267,7 +267,7 @@ jobs:
         - { ruby: '2.3', expected_rubygems_version: '3.3.27' }
         - { ruby: '2.0', expected_rubygems_version: '2.7.11' }
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ./
       with:
         ruby-version: ${{ matrix.ruby }}
@@ -278,7 +278,7 @@ jobs:
     name: "Test rubygems: version upgrades RubyGems to that version if the default is older"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -289,7 +289,7 @@ jobs:
     name: "Test rubygems: version noops if the default is newer"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ./
       with:
         ruby-version: '3.1.0'
@@ -300,7 +300,7 @@ jobs:
     name: "Test rubygems: version uses the Bundler installed by the rubygems update"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./
         with:
           ruby-version: '3.1.0'
@@ -312,7 +312,7 @@ jobs:
     name: "Test bundler: 1.x for old Ruby"
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./
         with:
           ruby-version: '2.3'
@@ -323,7 +323,7 @@ jobs:
     name: "Test with a major Bundler version"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -334,7 +334,7 @@ jobs:
     name: "Test with a minor Bundler version"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -345,18 +345,31 @@ jobs:
     name: "Test with an exact Bundler version"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ./
       with:
         ruby-version: '2.6'
         bundler: 2.2.3
     - run: bundle --version | grep -F "Bundler version 2.2.3"
 
+  # https://github.com/ruby/setup-ruby/issues/845
+  testOlderBundlerVersion:
+    name: "Test with an older Bundler version than the one of the default gem"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v6
+    - uses: ./
+      with:
+        ruby-version: '4.0'
+        bundler: 2.7.2
+        bundler-cache: true
+    - run: bundle --version | grep -F "Bundler version 2.7.2"
+
   testBundlerPre:
     name: "Test with a Bundler pre/rc version"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./
         with:
           ruby-version: '2.6'
@@ -369,7 +382,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/bundler-dev.gemfile
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./
         with:
           ruby-version: ruby-head
@@ -381,7 +394,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/bundler1.gemfile
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./
         with:
           ruby-version: '2.7'
@@ -399,7 +412,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./
         with:
           ruby-version: '3.2'
@@ -410,7 +423,7 @@ jobs:
     name: "Test windows-toolchain: none"
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./
         with:
           ruby-version: '2.7'
@@ -422,7 +435,7 @@ jobs:
   lint:
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - run: yarn install
     - run: yarn run package
     - name: Check generated files are up to date

.github/workflows/update-v1-branch.yml

@@ -9,7 +9,7 @@ jobs:
   update_branch:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - run: git push origin HEAD:v1

README.md

@@ -15,7 +15,7 @@ This action currently supports these versions of MRI, JRuby and TruffleRuby:
 
 | Interpreter | Versions |
 | ----------- | -------- |
-| `ruby` | 1.9.3, 2.0.0, 2.1.9, 2.2, all versions from 2.3.0 until 4.0.0-preview2, head, debug, mingw, mswin, ucrt |
+| `ruby` | 1.9.3, 2.0.0, 2.1.9, 2.2, all versions from 2.3.0 until 4.0.0, head, debug, mingw, mswin, ucrt |
 | `jruby` | 9.1.17.0 - 10.0.2.0, head |
 | `truffleruby` | 19.3.0 - 25.0.0, head |
 | `truffleruby+graalvm` | 21.2.0 - 25.0.0, head |
@@ -50,7 +50,7 @@ The action works on these [GitHub-hosted runners](https://docs.github.com/en/act
 | Operating System | Supported |
 | ---------------- | --------- |
 | Ubuntu  | `ubuntu-22.04`, `ubuntu-24.04`, `ubuntu-22.04-arm`, `ubuntu-24.04-arm` |
-| macOS   | `macos-13` and newer versions |
+| macOS   | `macos-14` and newer versions |
 | Windows | `windows-2022`, `windows-2025`, `windows-11-arm` |
 
 Not all combinations of runner images and versions are supported.

bundler.js

@@ -162,10 +162,10 @@ export async function bundleInstall(gemfile, lockFile, platform, engine, rubyVer
   }
 
   let envOptions = {}
-  if (bundlerVersion.startsWith('1') && common.isBundler2PlusDefault(engine, rubyVersion)) {
-    // If Bundler 1 is specified on Rubies which ship with Bundler 2+,
-    // we need to specify which Bundler version to use explicitly until the lockfile exists.
-    console.log(`Setting BUNDLER_VERSION=${bundlerVersion} for "bundle config|lock" commands below to ensure Bundler 1 is used`)
+  if (bundlerVersion.match(/^\d+/)) {
+    // If a specific Bundler version is given or determined, we need to specify the version to use explicitly until the lockfile exists.
+    // Otherwise, a newer version of Bundler might be used.
+    console.log(`Setting BUNDLER_VERSION=${bundlerVersion} for "bundle config|lock" commands below to ensure Bundler ${bundlerVersion} is used`)
     envOptions = { env: { ...process.env, BUNDLER_VERSION: bundlerVersion } }
   }
 
@@ -218,7 +218,8 @@ export async function bundleInstall(gemfile, lockFile, platform, engine, rubyVer
   await exec.exec('bundle', ['install', '--jobs', `${jobs}`])
 
   // @actions/cache only allows to save for non-existing keys
-  if (!common.isExactCacheKeyMatch(key, cachedKey)) {
+  // Also, skip saving cache for merge_group event
+  if (!common.isExactCacheKeyMatch(key, cachedKey) && process.env['GITHUB_EVENT_NAME'] !== 'merge_group') {
     if (cachedKey) { // existing cache but Gemfile.lock differs, clean old gems
       await exec.exec('bundle', ['clean'])
     }

common.js

@@ -13,6 +13,7 @@ const linuxOSInfo = require('linux-os-info')
 export const windows = (os.platform() === 'win32')
 // Extract to SSD on Windows, see https://github.com/ruby/setup-ruby/pull/14
 export const drive = (windows ? (process.env['RUNNER_TEMP'] || 'C')[0] : undefined)
+const PATH_ENV_VAR = windows ? 'Path' : 'PATH'
 
 export const inputs = {
   selfHosted: undefined
@@ -365,23 +366,22 @@ export function win2nix(path) {
 }
 
 export function setupPath(newPathEntries) {
-  const envPath = windows ? 'Path' : 'PATH'
-  const originalPath = process.env[envPath].split(path.delimiter)
+  const originalPath = process.env[PATH_ENV_VAR].split(path.delimiter)
   let cleanPath = originalPath.filter(entry => !/\bruby\b/i.test(entry))
 
-  core.group(`Modifying ${envPath}`, async () => {
+  core.group(`Modifying ${PATH_ENV_VAR}`, async () => {
     // First remove the conflicting path entries
     if (cleanPath.length !== originalPath.length) {
-      console.log(`Entries removed from ${envPath} to avoid conflicts with default Ruby:`)
+      console.log(`Entries removed from ${PATH_ENV_VAR} to avoid conflicts with default Ruby:`)
       for (const entry of originalPath) {
         if (!cleanPath.includes(entry)) {
           console.log(`  ${entry}`)
         }
       }
-      core.exportVariable(envPath, cleanPath.join(path.delimiter))
+      core.exportVariable(PATH_ENV_VAR, cleanPath.join(path.delimiter))
     }
 
-    console.log(`Entries added to ${envPath} to use selected Ruby:`)
+    console.log(`Entries added to ${PATH_ENV_VAR} to use selected Ruby:`)
     for (const entry of newPathEntries) {
       console.log(`  ${entry}`)
     }
@@ -415,14 +415,17 @@ export async function setupJavaHome(rubyPrefix) {
       // JAVA_HOME_21_X64 - https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md#java
       let newHomeVar = `JAVA_HOME_21_${arch}`
       let newHome = process.env[newHomeVar]
+      let bin = path.join(newHome, 'bin')
 
       if (newHome === "undefined") {
         throw new Error(`JAVA_HOME is not Java 21+ needed for JRuby and \$${newHomeVar} is not defined`)
       }
 
       console.log(`Setting JAVA_HOME to ${newHomeVar} path ${newHome}`)
-
       core.exportVariable("JAVA_HOME", newHome)
+
+      console.log(`Adding ${bin} to ${PATH_ENV_VAR}`)
+      core.addPath(bin)
     }
   })
 }

index.js

@@ -175,7 +175,7 @@ function validateRubyEngineAndVersion(platform, engineVersions, engine, parsedVe
   // Well known version-platform combinations which do not work:
   if (engine === 'ruby' && platform.startsWith('macos') && os.arch() === 'arm64' && common.floatVersion(version) < 2.6) {
     throw new Error(`CRuby < 2.6 does not support macos-arm64.
-        Either use a newer Ruby version or use a macOS image running on amd64, e.g., macos-13.
+        Either use a newer Ruby version or use a macOS image running on amd64, e.g., macos-15-intel.
         Note that GitHub changed the meaning of macos-latest from macos-12 (amd64) to macos-14 (arm64):
         https://github.blog/changelog/2024-04-01-macos-14-sonoma-is-generally-available-and-the-latest-macos-runner-image/
 
@@ -188,8 +188,8 @@ function validateRubyEngineAndVersion(platform, engineVersions, engine, parsedVe
           - { os: macos-latest, ruby: '2.4' }
           - { os: macos-latest, ruby: '2.5' }
           include:
-          - { os: macos-13, ruby: '2.4' }
-          - { os: macos-13, ruby: '2.5' }
+          - { os: macos-15-intel, ruby: '2.4' }
+          - { os: macos-15-intel, ruby: '2.5' }
 
         But of course you should consider dropping support for these long-EOL Rubies, which cannot even be built on recent macOS machines.`)
   } else if (engine === 'truffleruby' && platform.startsWith('windows')) {

ruby-builder-versions.json

@@ -13,9 +13,9 @@
     "3.1.0-preview1", "3.1.0", "3.1.1", "3.1.2", "3.1.3", "3.1.4", "3.1.5", "3.1.6", "3.1.7",
     "3.2.0-preview1", "3.2.0-preview2", "3.2.0-preview3", "3.2.0-rc1", "3.2.0", "3.2.1", "3.2.2", "3.2.3", "3.2.4", "3.2.5", "3.2.6", "3.2.7", "3.2.8", "3.2.9",
     "3.3.0-preview1", "3.3.0-preview2", "3.3.0-preview3", "3.3.0-rc1", "3.3.0", "3.3.1", "3.3.2", "3.3.3", "3.3.4", "3.3.5", "3.3.6", "3.3.7", "3.3.8", "3.3.9", "3.3.10",
-    "3.4.0-preview1", "3.4.0-preview2", "3.4.0-rc1", "3.4.0", "3.4.1", "3.4.2", "3.4.3", "3.4.4", "3.4.5", "3.4.6", "3.4.7",
+    "3.4.0-preview1", "3.4.0-preview2", "3.4.0-rc1", "3.4.0", "3.4.1", "3.4.2", "3.4.3", "3.4.4", "3.4.5", "3.4.6", "3.4.7", "3.4.8",
     "3.5.0-preview1",
-    "4.0.0-preview2",
+    "4.0.0-preview2", "4.0.0-preview3", "4.0.0",
     "head", "debug", "asan", "3.4-asan"
   ],
   "jruby": [

windows-toolchain-versions.json

@@ -267,6 +267,14 @@
     "arm64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-clangarm64.7z",
     "x64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-ucrt64.7z"
   },
+  "3.4.8": {
+    "arm64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-clangarm64.7z",
+    "x64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-ucrt64.7z"
+  },
+  "4.0.0": {
+    "arm64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-clangarm64.7z",
+    "x64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-ucrt64.7z"
+  },
   "head": {
     "arm64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-clangarm64.7z",
     "x64": "https://github.com/ruby/setup-msys2-gcc/releases/latest/download/msys2-ucrt64.7z"

windows-versions.json

@@ -267,6 +267,14 @@
     "arm64": "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-3.4.7-1/rubyinstaller-3.4.7-1-arm.7z",
     "x64": "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-3.4.7-1/rubyinstaller-3.4.7-1-x64.7z"
   },
+  "3.4.8": {
+    "arm64": "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-3.4.8-1/rubyinstaller-3.4.8-1-arm.7z",
+    "x64": "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-3.4.8-1/rubyinstaller-3.4.8-1-x64.7z"
+  },
+  "4.0.0": {
+    "arm64": "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-4.0.0-1/rubyinstaller-4.0.0-1-arm.7z",
+    "x64": "https://github.com/oneclick/rubyinstaller2/releases/download/RubyInstaller-4.0.0-1/rubyinstaller-4.0.0-1-x64.7z"
+  },
   "head": {
     "arm64": "https://github.com/oneclick/rubyinstaller2/releases/download/rubyinstaller-head/rubyinstaller-head-arm.7z",
     "x64": "https://github.com/oneclick/rubyinstaller2/releases/download/rubyinstaller-head/rubyinstaller-head-x64.7z"