Musl support

__tests__/liberica.test.ts

@@ -1,4 +1,5 @@
 import * as liberica from '../src/liberica'
+import * as c from '../src/constants'
 import * as path from 'path'
 import * as semver from 'semver'
 import {expect, test} from '@jest/globals'
@@ -35,18 +36,22 @@ test('find latest JDK version', async () => {
 }, 30000)
 
 test('find asset URL', async () => {
-  await expectURL(
-    '17.0.10+13',
-    'core',
-    'bellsoft-liberica-vm-core-openjdk17.0.10'
-  )
+  await expectURL('11.0.22+12', '', 'bellsoft-liberica-vm-openjdk11.0.22')
   await expectURL('17.0.10+13', 'std', 'bellsoft-liberica-vm-openjdk17.0.10')
   await expectURL(
     '21.0.2+14',
-    'full',
-    'bellsoft-liberica-vm-full-openjdk21.0.2'
+    'core',
+    'bellsoft-liberica-vm-core-openjdk21.0.2'
   )
-  await expectURL('21.0.2+14', '', 'bellsoft-liberica-vm-openjdk21.0.2')
+
+  if (!c.IS_LINUX) {
+    // This check can fail on Linux because there's no `full` version for aarch64 and musl
+    await expectURL(
+      '21.0.2+14',
+      'full',
+      'bellsoft-liberica-vm-full-openjdk21.0.2'
+    )
+  }
 }, 10000)
 
 type verifier = (

src/liberica.ts

@@ -6,6 +6,7 @@ import {
   getMatchingTags
 } from './utils'
 import {downloadTool} from '@actions/tool-cache'
+import {spawnSync} from 'child_process'
 
 const LIBERICA_GH_USER = 'bell-sw'
 const LIBERICA_RELEASES_REPO = 'LibericaNIK'
@@ -96,8 +97,21 @@ function determineToolName(javaVersion: string, version: string) {
 }
 
 function determinePlatformPart() {
-  // for linux-musl, return `linux-${c.JDK_ARCH}-musl`
-  return `${c.JDK_PLATFORM}-${c.GRAALVM_ARCH}`
+  if (isMuslBasedLinux()) {
+    return `linux-${c.JDK_ARCH}-musl`
+  } else {
+    return `${c.JDK_PLATFORM}-${c.GRAALVM_ARCH}`
+  }
+}
+
+function isMuslBasedLinux() {
+  if (c.IS_LINUX) {
+    const output = spawnSync('ldd', ['--version']).stderr.toString('utf8')
+    if (output.indexOf('musl') > -1) {
+      return true
+    }
+  }
+  return false
 }
 
 function isDigit(c: string) {