Introduce native-image-musl feature.

.github/workflows/test.yml

@@ -71,8 +71,27 @@ jobs:
           java --version
           native-image.cmd --version
         if: runner.os == 'Windows'
+  test-native-image-musl:
+    name: native-image-musl on ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run setup-graalvm action
+        uses: ./
+        with:
+          version: 'latest'
+          java-version: '17'
+          components: 'native-image'
+          features: 'native-image-musl'
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build static HelloWorld image with Native Image and musl
+        run: |
+          echo 'public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } }' > HelloWorld.java
+          javac HelloWorld.java
+          native-image --static --libc=musl HelloWorld
+          ./helloworld
   test-additional:
-    name: Extensive tests on ubuntu-latest
+    name: extensive tests on ubuntu-latest
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2

README.md

@@ -92,9 +92,18 @@ jobs:
 | `version`<br>*(required)* | n/a | `X.Y.Z` (e.g., `22.0.0`) for a specific [GraalVM release][releases]<br>`latest` for [latest stable release][stable],<br>`dev` for [latest dev build][dev-build],<br>`mandrel-X.Y.Z` (e.g., `mandrel-21.3.0.0-Final`) for a specific [Mandrel release][mandrel-releases],<br>`mandrel-latest` for [latest Mandrel stable release][mandrel-stable]. |
 | `java-version`<br>*(required)* | n/a | `'11'` or `'17'` for a specific Java version.<br>(`'8'` and `'16'` are supported for GraalVM 21.2 and earlier.) |
 | `components`    | `''`     | Comma-spearated list of GraalVM components (e.g., `native-image` or `ruby,nodejs`) that will be installed by the [GraalVM Updater][gu]. |
+| `features`      | `''`     | Comma-separated list of [optional features](#optional-features). |
 | `github-token`  | `''`     | Token for communication with the GitHub API. Please set to `${{ secrets.GITHUB_TOKEN }}` (see [templates](#templates)) to allow the action to authenticate with the GitHub API, which helps to reduce rate limiting issues. |
 | `set-java-home` | `'true'` | If set to `'true'`, instructs the action to set `$JAVA_HOME` to the path of the GraalVM installation. |
 
+
+## Optional Features
+
+| Name                | Description |
+|---------------------|-------------|
+| `native-image-musl` | Sets up [musl] for building [static images][native-image-static] with GraalVM Native Image *(Linux only)*. [Example usage][native-image-musl-build] (be sure to replace `uses: ./` with `uses: graalvm/setup-graalvm@v1`). |
+
+
 ## Contributing
 
 We welcome code contributions. To get started, you will need to sign the [Oracle Contributor Agreement][oca] (OCA).
@@ -108,7 +117,10 @@ Only pull requests from committers that can be verified as having signed the OCA
 [mandrel]: https://github.com/graalvm/mandrel
 [mandrel-releases]: https://github.com/graalvm/mandrel/releases
 [mandrel-stable]: https://github.com/graalvm/mandrel/releases/latest
+[musl]: https://musl.libc.org/
 [native-image]: https://www.graalvm.org/native-image/
+[native-image-musl-build]: https://github.com/graalvm/setup-graalvm/blob/main/.github/workflows/test.yml
+[native-image-static]: https://github.com/oracle/graal/blob/fa6f4a974dedacf4688dcc430dd100849d9882f2/docs/reference-manual/native-image/StaticImages.md
 [oca]: https://oca.opensource.oracle.com
 [releases]: https://github.com/graalvm/graalvm-ce-builds/releases
 [repo]: https://github.com/oracle/graal

action.yml

@@ -13,15 +13,19 @@ inputs:
     description: 'Java version (11 or 17, 8 or 16 for older releases).'
   components:
     required: false
-    description: 'Comma-separated list of GraalVM components to be installed'
+    description: 'Comma-separated list of GraalVM components to be installed.'
+    default: ''
+  features:
+    required: false
+    description: 'Comma-separated list of optional features (see README.md).'
     default: ''
   github-token:
     required: false
-    description: 'Set it to secrets.GITHUB_TOKEN to increase rate limits when accessing the GitHub API'
+    description: 'Set it to secrets.GITHUB_TOKEN to increase rate limits when accessing the GitHub API.'
     default: ''
   set-java-home:
     required: false
-    description: 'Set $JAVA_HOME to the GraalVM installation. Default: true'
+    description: 'Set $JAVA_HOME to the GraalVM installation. Default: true.'
     default: 'true'
 runs:
   using: 'node12'

src/constants.ts

@@ -2,6 +2,7 @@ import * as otypes from '@octokit/types'
 import {homedir} from 'os'
 import {join} from 'path'
 
+export const IS_LINUX = process.platform === 'linux'
 export const IS_MACOS = process.platform === 'darwin'
 export const IS_WINDOWS = process.platform === 'win32'
 

src/features.ts

@@ -0,0 +1,64 @@
+import * as core from '@actions/core'
+import * as tc from '@actions/tool-cache'
+import {IS_LINUX} from './constants'
+import {exec} from '@actions/exec'
+import {homedir} from 'os'
+import {join} from 'path'
+import {mkdirP} from '@actions/io'
+
+export async function enableFeatures(features: string[]): Promise<void> {
+  for (const feature of features) {
+    await enableFeature(feature)
+  }
+}
+
+async function enableFeature(feature: string): Promise<void> {
+  switch (feature) {
+    case 'native-image-musl':
+      await enableNativeImageMusl()
+      break
+    default:
+      core.warning(`Unknown feature requested: ${feature}`)
+      break
+  }
+}
+
+async function enableNativeImageMusl(): Promise<void> {
+  if (!IS_LINUX) {
+    core.warning('musl is only supported on Linux')
+    return
+  }
+  core.startGroup(`Setting up musl for GraalVM Native Image...`)
+  const basePath = join(homedir(), '.musl_feature')
+  await mkdirP(basePath)
+
+  const muslName = 'x86_64-linux-musl-native'
+  const muslDownloadPath = await tc.downloadTool(
+    `http://more.musl.cc/10/x86_64-linux-musl/${muslName}.tgz`
+  )
+  await tc.extractTar(muslDownloadPath, basePath)
+  const muslPath = join(basePath, muslName)
+  core.addPath(join(muslPath, 'bin'))
+
+  const zlibVersion = '1.2.11'
+  const zlibDownloadPath = await tc.downloadTool(
+    `https://zlib.net/zlib-${zlibVersion}.tar.gz`
+  )
+  await tc.extractTar(zlibDownloadPath, basePath)
+  const zlibPath = join(basePath, `zlib-${zlibVersion}`)
+  const zlibBuildOptions = {
+    cwd: zlibPath,
+    env: {
+      ...process.env,
+      CC: join(muslPath, 'bin', 'gcc')
+    }
+  }
+  await exec(
+    './configure',
+    [`--prefix=${muslPath}`, '--static'],
+    zlibBuildOptions
+  )
+  await exec('make', [], zlibBuildOptions)
+  await exec('make', ['install'], {cwd: zlibPath})
+  core.endGroup()
+}

src/main.ts

@@ -1,6 +1,8 @@
 import * as c from './constants'
 import * as core from '@actions/core'
 import * as graalvm from './graalvm'
+import {enableFeatures} from './features'
+import {extractCommaSeparatedList} from './utils'
 import {join} from 'path'
 import {mkdirP} from '@actions/io'
 import {setUpDependencies} from './dependencies'
@@ -10,17 +12,17 @@ import {setUpWindowsEnvironment} from './msvc'
 
 async function run(): Promise<void> {
   try {
-    const graalvmVersion: string = core.getInput('version', {required: true})
-    const javaVersion: string = core.getInput('java-version', {required: true})
-    const componentsString: string = core.getInput('components')
-    const components: string[] =
-      componentsString.length > 0 ? componentsString.split(',') : []
+    const graalvmVersion = core.getInput('version', {required: true})
+    const javaVersion = core.getInput('java-version', {required: true})
+    const components = extractCommaSeparatedList(core.getInput('components'))
+    const features = extractCommaSeparatedList(core.getInput('features'))
     const setJavaHome = core.getInput('set-java-home') === 'true'
 
     if (c.IS_WINDOWS) {
       setUpWindowsEnvironment()
     }
-    setUpDependencies(components)
+    await setUpDependencies(components)
+    await enableFeatures(features)
 
     await mkdirP(c.GRAALVM_BASE)
 
@@ -57,7 +59,9 @@ async function run(): Promise<void> {
     if (components.length > 0) {
       if (graalvmVersion.startsWith(c.MANDREL_NAMESPACE)) {
         core.warning(
-          `Mandrel does not support GraalVM components: ${componentsString}`
+          `Mandrel does not support GraalVM components: ${core.getInput(
+            'components'
+          )}`
         )
       } else {
         await setUpGUComponents(graalVMHome, components)

src/utils.ts

@@ -53,3 +53,7 @@ export function findJavaHomeInSubfolder(searchPath: string): string {
     )
   }
 }
+
+export function extractCommaSeparatedList(list: string): string[] {
+  return list.length > 0 ? list.split(',') : []
+}