Upgrade musl and follow recommendation.

Closes #113

Author: fniephaus

dist/main/index.js

@@ -3,9 +3,14 @@ import * as core from '@actions/core'
 import * as tc from '@actions/tool-cache'
 import {exec} from '../utils'
 import {join} from 'path'
+import {homedir} from 'os'
+import {promises as fs} from 'fs'
 
-const MUSL_NAME = 'x86_64-linux-musl-native'
-const MUSL_VERSION = '10.2.1'
+const MUSL_NAME = 'musl-gcc'
+const MUSL_VERSION = '1.2.4'
+const ZLIB_VERSION = '1.2.13'
+
+// Build instructions: https://github.com/oracle/graal/blob/6dab549194b85252f88bda4ee825762d8b02c687/docs/reference-manual/native-image/guides/build-static-and-mostly-static-executable.md?plain=1#L38-L67
 
 export async function setUpNativeImageMusl(): Promise<void> {
   if (!c.IS_LINUX) {
@@ -14,38 +19,55 @@ export async function setUpNativeImageMusl(): Promise<void> {
   }
   let toolPath = tc.find(MUSL_NAME, MUSL_VERSION)
   if (toolPath) {
-    core.info(`Found ${MUSL_NAME} ${MUSL_VERSION} in tool-cache @ ${toolPath}`)
+    core.info(`Found musl ${MUSL_VERSION} in tool-cache @ ${toolPath}`)
   } else {
-    core.startGroup(`Setting up musl for GraalVM Native Image...`)
+    core.startGroup(`Building musl with zlib for GraalVM Native Image...`)
+    // Build musl
+    const muslHome = join(homedir(), 'musl-toolchain')
     const muslDownloadPath = await tc.downloadTool(
-      `https://github.com/graalvm/setup-graalvm/releases/download/x86_64-linux-musl-${MUSL_VERSION}/${MUSL_NAME}.tgz`
+      `https://musl.libc.org/releases/musl-${MUSL_VERSION}.tar.gz`
     )
     const muslExtractPath = await tc.extractTar(muslDownloadPath)
-    const muslPath = join(muslExtractPath, MUSL_NAME)
-
-    const zlibCommit = 'ec3df00224d4b396e2ac6586ab5d25f673caa4c2'
+    const muslPath = join(muslExtractPath, `musl-${MUSL_VERSION}`)
+    const muslBuildOptions = {cwd: muslPath}
+    await exec(
+      './configure',
+      [`--prefix=${muslHome}`, '--static'],
+      muslBuildOptions
+    )
+    await exec('make', [], muslBuildOptions)
+    await exec('make', ['install'], muslBuildOptions)
+    const muslGCC = join(muslHome, 'bin', MUSL_NAME)
+    await fs.symlink(
+      muslGCC,
+      join(muslHome, 'bin', 'x86_64-linux-musl-gcc'),
+      'file'
+    )
+    // Build zlib
     const zlibDownloadPath = await tc.downloadTool(
-      `https://github.com/madler/zlib/archive/${zlibCommit}.tar.gz`
+      `https://zlib.net/fossils/zlib-${ZLIB_VERSION}.tar.gz`
     )
     const zlibExtractPath = await tc.extractTar(zlibDownloadPath)
-    const zlibPath = join(zlibExtractPath, `zlib-${zlibCommit}`)
+    const zlibPath = join(zlibExtractPath, `zlib-${ZLIB_VERSION}`)
     const zlibBuildOptions = {
       cwd: zlibPath,
       env: {
         ...process.env,
-        CC: join(muslPath, 'bin', 'gcc')
+        CC: muslGCC
       }
     }
     await exec(
       './configure',
-      [`--prefix=${muslPath}`, '--static'],
+      [`--prefix=${muslHome}`, '--static'],
       zlibBuildOptions
     )
     await exec('make', [], zlibBuildOptions)
     await exec('make', ['install'], {cwd: zlibPath})
-
-    core.info(`Adding ${MUSL_NAME} ${MUSL_VERSION} to tool-cache ...`)
-    toolPath = await tc.cacheDir(muslPath, MUSL_NAME, MUSL_VERSION)
+    // Store in cache
+    core.info(
+      `Adding musl ${MUSL_VERSION} with zlib ${ZLIB_VERSION} to tool-cache ...`
+    )
+    toolPath = await tc.cacheDir(muslHome, MUSL_NAME, MUSL_VERSION)
     core.endGroup()
   }
   core.addPath(join(toolPath, 'bin'))