chore(ci): improve iOS build caching for test harness (#126)

## Summary
- Cache Xcode build artifacts in test-harness-ios job, skipping
xcodebuild when only JS files change
- Update turbo inputs to only track `src/specs/*.nitro.ts` instead of
all TS files

## Test plan
- [ ] Verify CI passes on first run (cache miss, full build)
- [ ] Verify subsequent JS-only changes skip native build (cache hit)

Author: mfazekas

.github/workflows/ci.yml

@@ -99,7 +99,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ${{ env.TURBO_CACHE_DIR }}
-          key: ${{ runner.os }}-turborepo-android-${{ hashFiles('yarn.lock', 'android/**', 'nitrogen/generated/android/**') }}
+          key: ${{ runner.os }}-turborepo-android-${{ hashFiles('yarn.lock', 'android/**', 'nitrogen/generated/android/**', 'src/specs/*.nitro.ts') }}
           restore-keys: |
             ${{ runner.os }}-turborepo-android-
 
@@ -158,7 +158,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ${{ env.TURBO_CACHE_DIR }}
-          key: ${{ runner.os }}-turborepo-ios-${{ hashFiles('yarn.lock', 'ios/**', 'nitrogen/generated/ios/**', '*.podspec') }}
+          key: ${{ runner.os }}-turborepo-ios-${{ hashFiles('yarn.lock', 'ios/**', 'nitrogen/generated/ios/**', '*.podspec', 'src/specs/*.nitro.ts') }}
           restore-keys: |
             ${{ runner.os }}-turborepo-ios-
 
@@ -241,7 +241,17 @@ jobs:
           bundle install
           bundle exec pod install --project-directory=ios
 
+      - name: Restore iOS build cache
+        id: ios-build-cache
+        uses: actions/cache/restore@v4
+        with:
+          path: example/ios/build
+          key: ${{ runner.os }}-ios-build-${{ env.XCODE_VERSION }}-${{ hashFiles('yarn.lock', 'ios/**', 'nitrogen/generated/ios/**', '*.podspec', 'example/ios/Podfile.lock', 'example/ios/RiveExample/**') }}
+          restore-keys: |
+            ${{ runner.os }}-ios-build-${{ env.XCODE_VERSION }}-
+
       - name: Build iOS app
+        if: steps.ios-build-cache.outputs.cache-hit != 'true'
         working-directory: example/ios
         run: |
           set -o pipefail && xcodebuild \
@@ -253,6 +263,13 @@ jobs:
             build \
             CODE_SIGNING_ALLOWED=NO
 
+      - name: Save iOS build cache
+        if: steps.ios-build-cache.outputs.cache-hit != 'true'
+        uses: actions/cache/save@v4
+        with:
+          path: example/ios/build
+          key: ${{ steps.ios-build-cache.outputs.cache-primary-key }}
+
       - name: Boot iOS Simulator
         uses: futureware-tech/simulator-action@v4
         with:

turbo.json

@@ -9,8 +9,7 @@
         "nitrogen/generated/android/**",
         "android",
         "!android/build",
-        "src/*.ts",
-        "src/*.tsx",
+        "src/specs/*.nitro.ts",
         "example/package.json",
         "example/android",
         "!example/android/.gradle",
@@ -27,8 +26,7 @@
         "nitrogen/generated/ios/**",
         "*.podspec",
         "ios",
-        "src/*.ts",
-        "src/*.tsx",
+        "src/specs/*.nitro.ts",
         "example/package.json",
         "example/ios",
         "!example/ios/build",