[Infra] Migrate .github/workflows/functions.yml to reusable workflows (#14906)

Author: ncooke3

.github/workflows/functions.yml

@@ -35,105 +35,20 @@ jobs:
       supports_swift6: true
       setup_command: FirebaseFunctions/Backend/start.sh synchronous
 
-  spm-package-resolved:
-    runs-on: macos-14
-    env:
-      FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT: 1
-    outputs:
-      cache_key: ${{ steps.generate_cache_key.outputs.cache_key }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Xcode
-        run: sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
-      - name: Generate Swift Package.resolved
-        id: swift_package_resolve
-        run: |
-          swift package resolve
-      - name: Generate cache key
-        id: generate_cache_key
-        run: |
-          cache_key="${{ runner.os }}-spm-${{ hashFiles('**/Package.resolved') }}"
-          echo "cache_key=${cache_key}" >> "$GITHUB_OUTPUT"
-      - uses: actions/cache/save@v4
-        id: cache
-        with:
-          path: .build
-          key: ${{ steps.generate_cache_key.outputs.cache_key }}
-
   spm-integration:
-    # Don't run on private repo unless it is a PR.
-    if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
-    needs: [spm-package-resolved]
+    uses: ./.github/workflows/common.yml
     strategy:
       matrix:
-        os: [macos-15]
-        xcode: [Xcode_16.3]
-    runs-on: ${{ matrix.os }}
-    env:
-      FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT: 1
-    steps:
-    - uses: actions/checkout@v4
-    - uses: actions/cache/restore@v4
-      with:
-        path: .build
-        key: ${{needs.spm-package-resolved.outputs.cache_key}}
-    - name: Initialize xcodebuild
-      run: scripts/setup_spm_tests.sh
-    - name: Integration Test Server
-      run: FirebaseFunctions/Backend/start.sh synchronous
-    - name: Xcode
-      run: sudo xcode-select -s /Applications/${{ matrix.xcode }}.app/Contents/Developer
-    - name: iOS Swift Integration Tests (including Swift library)
-      run: scripts/third_party/travis/retry.sh ./scripts/build.sh FirebaseFunctionsIntegration iOS spm
-    - name: iOS ObjC Integration Tests (using Swift library)
-      run: scripts/third_party/travis/retry.sh ./scripts/build.sh FirebaseFunctionsObjCIntegration iOS spm
-    - name: Combine Unit Tests
-      run: scripts/third_party/travis/retry.sh ./scripts/build.sh FunctionsCombineUnit iOS spm
+        target: [FirebaseFunctionsIntegration, FirebaseFunctionsObjCIntegration, FunctionsCombineUnit]
+    with:
+      target: ${{ matrix.target }}
+      platforms: iOS
+      setup_command: FirebaseFunctions/Backend/start.sh synchronous
 
   spm-unit:
-    # Don't run on private repo.
-    if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
-    needs: [spm-package-resolved]
-    strategy:
-      matrix:
-        include:
-          - os: macos-14
-            xcode: Xcode_16.2
-            target: iOS
-          - os: macos-15
-            xcode: Xcode_16.3
-            target: iOS
-          - os: macos-15
-            xcode: Xcode_16.3
-            target: tvOS
-          - os: macos-15
-            xcode: Xcode_16.3
-            target: macOS
-          - os: macos-15
-            xcode: Xcode_16.3
-            target: watchOS
-          - os: macos-15
-            xcode: Xcode_16.3
-            target: catalyst
-          - os: macos-15
-            xcode: Xcode_16.3
-            target: visionOS
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v4
-    - uses: actions/cache/restore@v4
-      with:
-        path: .build
-        key: ${{needs.spm-package-resolved.outputs.cache_key}}
-    - name: Xcode
-      run: sudo xcode-select -s /Applications/${{ matrix.xcode }}.app/Contents/Developer
-    - name: Install visionOS, if needed.
-      if: matrix.target == 'visionOS'
-      run: xcodebuild -downloadPlatform visionOS
-    - name: Initialize xcodebuild
-      run: scripts/setup_spm_tests.sh
-    - name: Unit Tests
-      run: scripts/third_party/travis/retry.sh ./scripts/build.sh FirebaseFunctionsUnit ${{ matrix.target }} spm
+    uses: ./.github/workflows/common.yml
+    with:
+      target: FirebaseFunctionsUnit
 
   # TODO: Move to macos-14 and Xcode 15. The legacy quickstart uses material which doesn't build on Xcode 15.
   # quickstart: