chore: adopt swiftorg metadata contract changes

.github/workflows/main.yml

@@ -160,7 +160,7 @@ jobs:
           swift: '5.0.0'
           development: false
         - os: macos-13
-          swift: 'latest'
+          swift: '5.9'
           development: false
         - os: windows-latest
           swift: '5.9'
@@ -216,6 +216,50 @@ jobs:
       if: runner.os == 'Windows'
       run: which link | grep "Microsoft Visual Studio" || exit 1
 
+    - name: Get cached installation
+      id: get-tool
+      if: failure()
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const os = require('os');
+          const fs = require('fs/promises');
+          const toolCache = require('@actions/tool-cache');
+          let arch = '';
+          switch (os.arch()) {
+            case 'x64':
+              arch = 'x86_64';
+              break;
+            case 'arm64':
+              arch = 'aarch64';
+              break;
+            default:
+              arch = os.arch();
+              break;
+          }
+          const key = process.env['SWIFT_SETUP_TOOL_KEY'];
+          if (!key) {
+            core.debug(`Toolcache not set`);
+            return;
+          }
+          const tools = toolCache.findAllVersions(key, arch);
+          if (!tools.length) {
+            core.debug(`No tools found for "${key}" with arch ${arch}`);
+            return;
+          } else {
+            core.debug(`Found tools "${tools.join(', ')}" for "${key}" with arch ${arch}`);
+          }
+          const tool = tools[0];
+          await fs.access(tool);
+          return { key: key, tool: tool };
+
+    - name: Upload cached installation as artifact
+      if: always() && steps.get-tool.outputs.result != ''
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ fromJson(steps.get-tool.outputs.result).key }}-tool
+        path: ${{ fromJson(steps.get-tool.outputs.result).tool }}
+
   dry-run:
     name: Check action with dry run
     if: needs.ci.outputs.run == 'true'

src/installer/base.ts

@@ -71,6 +71,9 @@ export abstract class ToolchainInstaller<Snapshot extends ToolchainSnapshot> {
 
     if (tool && version) {
       tool = await toolCache.cacheDir(tool, key, version, arch)
+      if (core.isDebug()) {
+        core.exportVariable('SWIFT_SETUP_TOOL_KEY', key)
+      }
       core.debug(`Added to tool cache at "${tool}"`)
     }
     if (

src/platform/versioned.ts

@@ -109,7 +109,7 @@ export abstract class VersionedPlatform<
           const pDownloadName =
             platform.dir ?? platform.name.replaceAll(/\s+/g, '').toLowerCase()
           const download = `${release.tag}-${pDownloadName}${this.archSuffix}.${this.downloadExtension}`
-          return platform.archs.includes(this.arch)
+          return platform.archs && platform.archs.includes(this.arch)
             ? ({
                 name: platform.name,
                 date: release.date,