feat: added open source toolchain preference option for xcode

.github/workflows/main.yml

@@ -180,6 +180,12 @@ jobs:
         - os: ubuntu-22.04
           swift: ${{ fromJSON(vars.SETUPSWIFT_CUSTOM_TOOLCHAINS).ubuntu2204 }} # custom toolchain
           development: true
+        - os: macos-14
+          swift: '6.0.3'
+          development: false
+          sdk: aarch64-swift-linux-musl
+          sdk-url: https://download.swift.org/swift-6.0.3-release/static-sdk/swift-6.0.3-RELEASE/swift-6.0.3-RELEASE_static-linux-0.0.1.artifactbundle.tar.gz
+          sdk-checksum: 67f765e0030e661a7450f7e4877cfe008db4f57f177d5a08a6e26fd661cdd0bd
 
     steps:
     - name: Checkout repository
@@ -210,6 +216,7 @@ jobs:
         development: ${{ matrix.development }}
         check-latest: ${{ needs.ci.outputs.check_latest }}
         cache-snapshot: ${{ !matrix.development }}
+        prefer-oss-toolchain: ${{ matrix.sdk != '' }}
 
     - name: Verify Swift version in macos
       if: runner.os == 'macOS'
@@ -222,6 +229,16 @@ jobs:
       if: runner.os == 'Windows'
       run: which link | grep "Microsoft Visual Studio" || exit 1
 
+    - name: Install SDK
+      if: matrix.sdk != ''
+      run: swift sdk install "${{ matrix.sdk-url }}" --checksum "${{ matrix.sdk-checksum }}"
+
+    - name: Test Swift package
+      if: matrix.sdk != ''
+      run: |
+        swift package init --type library --name SetupLib
+        swift build --swift-sdk ${{ matrix.sdk }}
+
     - name: Get cached installation
       id: get-tool
       if: failure()

__tests__/installer/xcode.test.ts

@@ -38,6 +38,7 @@ describe('macOS toolchain installation verification', () => {
     const installer = new XcodeToolchainInstaller(toolchain)
     jest.spyOn(fs, 'access').mockResolvedValue()
     jest.spyOn(exec, 'exec').mockResolvedValue(0)
+    jest.spyOn(core, 'getBooleanInput').mockReturnValue(false)
     jest.spyOn(exec, 'getExecOutput').mockResolvedValue({
       exitCode: 0,
       stdout: `swift-driver version: 1.75.2 Apple Swift version 5.8.1 (swiftlang-5.8.0.124.5 clang-1403.0.22.11.100)\nTarget: arm64-apple-macosx13.0`,
@@ -55,6 +56,48 @@ describe('macOS toolchain installation verification', () => {
     expect(process.env.DEVELOPER_DIR).toBe(toolchain.xcodePath)
   })
 
+  it('tests toolchain preinstalled not preferred', async () => {
+    const installer = new XcodeToolchainInstaller(toolchain)
+    const identifier = 'org.swift.581202305171a'
+    jest.spyOn(fs, 'access').mockResolvedValue()
+    jest.spyOn(exec, 'exec').mockResolvedValue(0)
+    jest.spyOn(core, 'getBooleanInput').mockReturnValue(true)
+    jest.spyOn(cache, 'restoreCache').mockResolvedValue(undefined)
+    jest.spyOn(toolCache, 'find').mockReturnValue('')
+    jest.spyOn(cache, 'saveCache').mockResolvedValue(1)
+    jest.spyOn(fs, 'access').mockResolvedValue()
+    jest.spyOn(fs, 'readFile').mockResolvedValue('')
+    jest.spyOn(fs, 'cp').mockResolvedValue()
+    jest.spyOn(plist, 'parse').mockReturnValue({CFBundleIdentifier: identifier})
+    jest.spyOn(exec, 'getExecOutput').mockResolvedValue({
+      exitCode: 0,
+      stdout: `swift-driver version: 1.75.2 Apple Swift version 5.8.1 (swiftlang-5.8.0.124.5 clang-1403.0.22.11.100)\nTarget: arm64-apple-macosx13.0`,
+      stderr: ''
+    })
+    const download = path.resolve('tool', 'download', 'path')
+    const extracted = path.resolve('tool', 'extracted', 'path')
+    const deployed = path.resolve('tool', 'deployed', 'path')
+    const cached = path.resolve('tool', 'cached', 'path')
+    const installationNeededSpy = jest.spyOn(installer, 'isInstallationNeeded')
+    const downloadSpy = jest
+      .spyOn(toolCache, 'downloadTool')
+      .mockResolvedValue(download)
+    const extractXarSpy = jest
+      .spyOn(toolCache, 'extractXar')
+      .mockResolvedValue(extracted)
+    const extractTarSpy = jest
+      .spyOn(toolCache, 'extractTar')
+      .mockResolvedValue(deployed)
+    const cacheSpy = jest.spyOn(toolCache, 'cacheDir').mockResolvedValue(cached)
+    await installer.install('x86_64')
+    await installer.install('aarch64')
+    for (const spy of [downloadSpy, extractXarSpy, extractTarSpy, cacheSpy]) {
+      expect(spy).toHaveBeenCalled()
+    }
+    expect(installationNeededSpy).toHaveBeenCalled()
+    expect(process.env.DEVELOPER_DIR).toBe(toolchain.xcodePath)
+  })
+
   it('tests download', async () => {
     const installer = new XcodeToolchainInstaller(toolchain)
     expect(installer['version']).toStrictEqual(parseSemVer('5.8.1'))
@@ -185,6 +228,7 @@ describe('macOS toolchain installation verification', () => {
     jest.spyOn(toolCache, 'find').mockReturnValue('')
     jest.spyOn(fs, 'access').mockResolvedValue()
     jest.spyOn(exec, 'exec').mockResolvedValue(0)
+    jest.spyOn(core, 'getBooleanInput').mockReturnValue(false)
     jest.spyOn(exec, 'getExecOutput').mockResolvedValue({
       exitCode: 0,
       stdout: `swift-driver version: 1.75.2 Apple Swift version 5.8.1 (swiftlang-5.8.0.124.5 clang-1403.0.22.11.100)\nTarget: arm64-apple-macosx13.0`,

action.yml

@@ -48,6 +48,12 @@ inputs:
       i.e. Microsoft.VisualStudio.Component.VC.ATL;Microsoft.VisualStudio.Component.VC.CMake.Project;Microsoft.VisualStudio.Component.Windows10SDK
     required: false
     default: ''
+  prefer-oss-toolchain:
+    description: >-
+      Whether to prefer installing Swift open source toolchain over using Xcode integrated toolchain.
+      i.e. Enable this option for installing static SDK: https://www.swift.org/documentation/articles/static-linux-getting-started.html
+    required: false
+    default: 'false'
 outputs:
   swift-version:
     description: The actual Swift version that was configured.

src/installer/xcode.ts

@@ -38,6 +38,10 @@ export class XcodeToolchainInstaller extends ToolchainInstaller<XcodeToolchainSn
     const command = this.swiftVersionCommand('')
     const version = await this.installedSwiftVersion(command)
     core.debug(`Found toolchain "${version}" bundled with Xcode ${xcode}`)
+    if (core.getBooleanInput('prefer-oss-toolchain')) {
+      core.debug(`Giving preference to open source toolchain`)
+      return true
+    }
     return this.data.dir !== `swift-${version}-RELEASE`
   }