feat: add input for bun-version-file

.github/workflows/test.yml

@@ -85,6 +85,7 @@ jobs:
             echo "Expected version to be 1.1.0, got ${{ steps.bun.outputs.version }}"
             exit 1
           fi
+
   setup-bun-from-tool-versions:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -99,10 +100,51 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Setup package.json
+
+      - name: Setup .tool-versions
         shell: bash
         run: |
-          echo "bun ${{ matrix.content }}" > .tool-versions
+          echo "${{ matrix.content }}" > .tool-versions
+
+      - name: Setup Bun
+        uses: ./
+
+      - name: Run Bun
+        id: bun
+        shell: bash
+        run: |
+          bun --version
+          echo "version=$(bun --version)" >> $GITHUB_OUTPUT
+
+      - name: Check version
+        shell: bash
+        run: |
+          if [[ "${{ steps.bun.outputs.version }}" == "1.1.0" ]]; then
+            echo "Version is 1.1.0"
+          else
+            echo "Expected version to be 1.1.0, got ${{ steps.bun.outputs.version }}"
+            exit 1
+          fi
+
+  setup-bun-from-bumrc:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        content:
+          - "1.1.0"
+          - "latest"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup .bumrc
+        shell: bash
+        run: |
+          echo "${{ matrix.content }}" > .bumrc
 
       - name: Setup Bun
         uses: ./

README.md

@@ -10,6 +10,14 @@ Download, install, and setup [Bun](https://bun.sh) in GitHub Actions.
     bun-version: latest
 ```
 
+## Using version file
+
+```yaml
+- uses: oven-sh/setup-bun@v1
+  with:
+    bun-version-file: '.bumrc'
+```
+
 ### Using a custom NPM registry
 
 ```yaml
@@ -35,8 +43,9 @@ In most cases, you shouldn't need to use the [setup-node](https://github.com/act
 ## Inputs
 
 | Name                | Description                                            | Default     | Examples                        |
-| -------------- | -------------------------------------------------- | ----------- | ------------------------------- |
+| ------------------- | ------------------------------------------------------ | ----------- | ------------------------------- |
 | `bun-version`       | The version of Bun to download and install.            | `latest`    | `canary`, `1.0.0`, `1.0.x`      |
+| `bun-version-file`  | The version of Bun to download and install from file.  | `undefined` | `canary`, `1.0.0`, `1.0.x`      |
 | `registry-url`      | Registry URL where some private package is stored.     | `undefined` | `"https://npm.pkg.github.com/"` |
 | `scope`             | Scope for private packages.                            | `undefined` | `"@foo"`, `"@orgname"`          |
 | `no-cache`          | Disable caching of the downloaded executable.          | `false`     | `true`, `false`                 |

action.yml

@@ -8,6 +8,9 @@ inputs:
   bun-version:
     description: 'The version of Bun to install. (e.g. "latest", "canary", "1.0.0", "1.0.x", <sha>)'
     required: false
+  bun-version-file:
+    description: 'The version of Bun to install from file. (e.g. ".bumrc")'
+    required: false
   registry-url:
     required: false
     description: "The URL of the package registry to use for installing Bun. Set the $BUN_AUTH_TOKEN environment variable to authenticate with the registry."

src/index.ts

@@ -14,12 +14,12 @@ if (!process.env.RUNNER_TEMP) {
   process.env.RUNNER_TEMP = tmpdir();
 }
 
-function readVersionFromPackageJson(): string | undefined {
+function readVersionFromPackageJson(file: string): string | undefined {
   const cwd = process.env.GITHUB_WORKSPACE;
   if (!cwd) {
     return;
   }
-  const path = join(cwd, "package.json");
+  const path = join(cwd, file);
   try {
     if (!existsSync(path)) {
       return;
@@ -32,16 +32,16 @@ function readVersionFromPackageJson(): string | undefined {
     return version;
   } catch (error) {
     const { message } = error as Error;
-    warning(`Failed to read package.json: ${message}`);
+    warning(`Failed to read ${file}: ${message}`);
   }
 }
 
-function readVersionFromToolVersions(): string | undefined {
+function readVersionFromToolVersions(file: string): string | undefined {
   const cwd = process.env.GITHUB_WORKSPACE;
   if (!cwd) {
     return;
   }
-  const path = join(cwd, ".tool-versions");
+  const path = join(cwd, file);
   try {
     if (!existsSync(path)) {
       return;
@@ -52,15 +52,61 @@ function readVersionFromToolVersions(): string | undefined {
     return match?.groups?.version;
   } catch (error) {
     const { message } = error as Error;
-    warning(`Failed to read .tool-versions: ${message}`);
+    warning(`Failed to read ${file}: ${message}`);
+  }
+}
+
+function readVersionFromBumrc(file: string): string | undefined {
+  const cwd = process.env.GITHUB_WORKSPACE;
+  if (!cwd) {
+    return;
+  }
+  const path = join(cwd, file);
+  try {
+    if (!existsSync(path)) {
+      return;
+    }
+
+    const match = readFileSync(path, "utf8");
+
+    return JSON.parse(match);
+  } catch (error) {
+    const { message } = error as Error;
+    warning(`Failed to read ${file}: ${message}`);
+  }
+}
+
+function readVersionFromFile(): string | undefined {
+  const cwd = process.env.GITHUB_WORKSPACE;
+  if (!cwd) {
+    return;
+  }
+  const file = getInput("bun-version-file");
+  const path = join(cwd, file);
+  try {
+    if (!existsSync(path)) {
+      return;
+    }
+
+    if (file === "package.json") {
+      return readVersionFromPackageJson(file)
+    } else if (file === ".tool-versions") {
+      return readVersionFromToolVersions(file)
+    } else if (file === ".bumrc") {
+      return readVersionFromBumrc(file)
+    } else {
+      warning(`Not allowed read version from ${file}`);
+    }
+  } catch (error) {
+    const { message } = error as Error;
+    warning(`Failed to read ${file}: ${message}`);
   }
 }
 
 runAction({
   version:
     getInput("bun-version") ||
-    readVersionFromPackageJson() ||
-    readVersionFromToolVersions() ||
+    readVersionFromFile() ||
     undefined,
   customUrl: getInput("bun-download-url") || undefined,
   registryUrl: getInput("registry-url") || undefined,