The release workflow needs a full checkout

* So there isn't a giant try/catch around it.

.github/workflows/release.yml

@@ -0,0 +1,12 @@
+name: Update the v1 branch when a release is published
+on:
+  release:
+    types: [published]
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - run: git push origin HEAD:v1

.github/workflows/test.yml

@@ -9,7 +9,7 @@ on:
     paths-ignore:
     - README.md
 jobs:
-  common:
+  test:
     strategy:
       fail-fast: false
       matrix:
@@ -78,7 +78,6 @@ jobs:
           echo ''
         }
 
-
   lint:
     runs-on: ubuntu-latest
     steps:

README.md

@@ -134,6 +134,11 @@ 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).
 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.

action.yml

@@ -6,13 +6,17 @@ branding:
   icon: download
 inputs:
   ruby-version:
-    description: 'Engine and version to use, see the syntax in the README. Reads from .ruby-version if unset.'
+    description: 'Engine and version to use, see the syntax in the README. Reads from .ruby-version or .tool-versions if unset.'
     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.'
     required: false
     default: 'default'
+  working-directory:
+    description: 'The working directory to use for resolving paths for .ruby-version, .tool-versions and Gemfile.lock.'
+    required: false
+    default: '.'
 outputs:
   ruby-prefix:
     description: 'The prefix of the installed ruby'

dist/index.js

@@ -965,36 +965,42 @@ const common = __webpack_require__(239)
 
 async function run() {
   try {
-    const platform = common.getVirtualEnvironmentName()
-    const [engine, version] = parseRubyEngineAndVersion(core.getInput('ruby-version'))
-
-    let installer
-    if (platform === 'windows-latest' && engine !== 'jruby') {
-      installer = __webpack_require__(826)
-    } else {
-      installer = __webpack_require__(489)
-    }
-
-    const engineVersions = installer.getAvailableVersions(platform, engine)
-    const ruby = validateRubyEngineAndVersion(platform, engineVersions, engine, version)
-
-    createGemRC()
-
-    const [rubyPrefix, newPathEntries] = await installer.install(platform, ruby)
-
-    setupPath(ruby, newPathEntries)
-
-    if (core.getInput('bundler') !== 'none') {
-      await common.measure('Installing Bundler', async () =>
-        installBundler(platform, rubyPrefix, engine, version))
-    }
-
-    core.setOutput('ruby-prefix', rubyPrefix)
+    await main()
   } catch (error) {
     core.setFailed(error.message)
   }
 }
 
+async function main() {
+  process.chdir(core.getInput('working-directory'))
+
+  const platform = common.getVirtualEnvironmentName()
+  const [engine, version] = parseRubyEngineAndVersion(core.getInput('ruby-version'))
+
+  let installer
+  if (platform === 'windows-latest' && engine !== 'jruby') {
+    installer = __webpack_require__(826)
+  } else {
+    installer = __webpack_require__(489)
+  }
+
+  const engineVersions = installer.getAvailableVersions(platform, engine)
+  const ruby = validateRubyEngineAndVersion(platform, engineVersions, engine, version)
+
+  createGemRC()
+
+  const [rubyPrefix, newPathEntries] = await installer.install(platform, ruby)
+
+  setupPath(ruby, newPathEntries)
+
+  if (core.getInput('bundler') !== 'none') {
+    await common.measure('Installing Bundler', async () =>
+      installBundler(platform, rubyPrefix, engine, version))
+  }
+
+  core.setOutput('ruby-prefix', rubyPrefix)
+}
+
 function parseRubyEngineAndVersion(rubyVersion) {
   if (rubyVersion === 'default') {
     if (fs.existsSync('.ruby-version')) {

index.js

@@ -7,36 +7,42 @@ const common = require('./common')
 
 export async function run() {
   try {
-    const platform = common.getVirtualEnvironmentName()
-    const [engine, version] = parseRubyEngineAndVersion(core.getInput('ruby-version'))
-
-    let installer
-    if (platform === 'windows-latest' && engine !== 'jruby') {
-      installer = require('./windows')
-    } else {
-      installer = require('./ruby-builder')
-    }
-
-    const engineVersions = installer.getAvailableVersions(platform, engine)
-    const ruby = validateRubyEngineAndVersion(platform, engineVersions, engine, version)
-
-    createGemRC()
-
-    const [rubyPrefix, newPathEntries] = await installer.install(platform, ruby)
-
-    setupPath(ruby, newPathEntries)
-
-    if (core.getInput('bundler') !== 'none') {
-      await common.measure('Installing Bundler', async () =>
-        installBundler(platform, rubyPrefix, engine, version))
-    }
-
-    core.setOutput('ruby-prefix', rubyPrefix)
+    await main()
   } catch (error) {
     core.setFailed(error.message)
   }
 }
 
+async function main() {
+  process.chdir(core.getInput('working-directory'))
+
+  const platform = common.getVirtualEnvironmentName()
+  const [engine, version] = parseRubyEngineAndVersion(core.getInput('ruby-version'))
+
+  let installer
+  if (platform === 'windows-latest' && engine !== 'jruby') {
+    installer = require('./windows')
+  } else {
+    installer = require('./ruby-builder')
+  }
+
+  const engineVersions = installer.getAvailableVersions(platform, engine)
+  const ruby = validateRubyEngineAndVersion(platform, engineVersions, engine, version)
+
+  createGemRC()
+
+  const [rubyPrefix, newPathEntries] = await installer.install(platform, ruby)
+
+  setupPath(ruby, newPathEntries)
+
+  if (core.getInput('bundler') !== 'none') {
+    await common.measure('Installing Bundler', async () =>
+      installBundler(platform, rubyPrefix, engine, version))
+  }
+
+  core.setOutput('ruby-prefix', rubyPrefix)
+}
+
 function parseRubyEngineAndVersion(rubyVersion) {
   if (rubyVersion === 'default') {
     if (fs.existsSync('.ruby-version')) {