Fix example in action.yml

Improves logging for caching, and adds 2 experimental cache options:

- `gradle-home-cache-strict-match`: Avoid re-using a Gradle Home cache entry written by a different job. Only cache entries written by the current Job will be used.
- `cache-write-only`: Do not restore existing cache entries, but still save cache entries in post-action.  Fixes #141.

.eslintrc.json

@@ -10,7 +10,9 @@
     "rules": {
       "eslint-comments/no-use": "off",
       "import/no-namespace": "off",
+      "i18n-text/no-en": "off",
       "no-unused-vars": "off",
+      "sort-imports": "off",
       "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
       "@typescript-eslint/explicit-member-accessibility": ["error", {"accessibility": "no-public"}],
       "@typescript-eslint/no-require-imports": "error",

.github/workflows/dev.yml

@@ -2,6 +2,7 @@ name: Verify generated outputs
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
 
 jobs:

.github/workflows/failure-cases.yml

@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
 
 jobs:
 

.github/workflows/integTest-action-inputs.yml

@@ -2,11 +2,12 @@ name: Test different action inputs
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
 
 jobs:
   action-inputs:

.github/workflows/integTest-caching-config.yml

@@ -2,16 +2,15 @@ name: Test caching configuration
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
   GRADLE_BUILD_ACTION_CACHE_DEBUG_ENABLED: true
 
 jobs:
-  # Run initial Gradle builds to push initial cache entries
-  # These builds should start fresh without cache hits, due to the seed injected into the cache key above.
   seed-build:
     strategy:
       matrix:
@@ -20,26 +19,19 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Build using Gradle wrapper
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test
-        # Add "wrapper" to main cache entry and remove 'wrapper-zips' bundle
-        # Exclude build-cache from main cache entry
+        # Add "enterprise" to main cache entry but omit "notifications"
         gradle-home-cache-includes: |
             caches
-            notifications
-            wrapper
+            enterprise
+        # Exclude build-cache from main cache entry
         gradle-home-cache-excludes: |
             caches/build-cache-1
-        gradle-home-cache-artifact-bundles: |
-            [
-              ["generated-gradle-jars", "caches/*/generated-gradle-jars/*.jar"],
-              ["dependencies", "caches/modules-*/files-*/*/*/*/*/"],
-              ["instrumented-jars", "caches/jars-*/*/"],
-              ["kotlin-dsl", "caches/*/kotlin-dsl/*/*/"]
-            ]
+    - name: Build using Gradle wrapper
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test
 
   # Test that the gradle-user-home cache will cache dependencies, by running build with --offline
   verify-build:
@@ -51,25 +43,100 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Execute Gradle build with --offline
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test --offline
-        cache-read-only: true
-        # Need the same configuration when restoring state from cache
+        # Use the same configuration as used in the seed build
         gradle-home-cache-includes: |
             caches
-            notifications
-            wrapper
+            enterprise
         gradle-home-cache-excludes: |
             caches/build-cache-1
-        gradle-home-cache-artifact-bundles: |
-            [
-              ["generated-gradle-jars", "caches/*/generated-gradle-jars/*.jar"],
-              ["dependencies", "caches/modules-*/files-*/*/*/*/*/"],
-              ["instrumented-jars", "caches/jars-*/*/"],
-              ["kotlin-dsl", "caches/*/kotlin-dsl/*/*/"]
-            ]
+        cache-read-only: true
+    - name: Execute Gradle build with --offline
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --offline
 
+  # Test that build scans are captured when caching is explicitly disabled
+  cache-disabled:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+      with:
+        cache-disabled: true
+    - name: Run Gradle build
+      id: gradle
+      working-directory: __tests__/samples/no-wrapper${{ matrix.build-root-suffix }}
+      run: gradle help "-DgradleVersionCheck=${{matrix.gradle}}"
+    - name: Check build scan url is captured
+      if: ${{ !steps.gradle.outputs.build-scan-url }}
+      uses: actions/github-script@v3
+      with:
+        script: |
+          core.setFailed('No build scan detected')
+
+  # Test that build scans are captured when caching is disabled because Gradle User Home already exists
+  cache-disabled-pre-existing-gradle-home:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Create dummy Gradle User Home
+      run: mkdir -p ~/.gradle/caches
+    - name: Setup Gradle
+      uses: ./
+    - name: Run Gradle build
+      id: gradle
+      working-directory: __tests__/samples/no-wrapper${{ matrix.build-root-suffix }}
+      run: gradle help "-DgradleVersionCheck=${{matrix.gradle}}"
+    - name: Check build scan url is captured
+      if: ${{ !steps.gradle.outputs.build-scan-url }}
+      uses: actions/github-script@v3
+      with:
+        script: |
+          core.setFailed('No build scan detected')
+
+  # Test seed the cache with cache-write-only and verify with cache-read-only
+  seed-build-write-only:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-write-only-
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+      with:
+        cache-write-only: true
+    - name: Build using Gradle wrapper
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test
+
+  verify-write-only-build:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-write-only-
+    needs: seed-build-write-only
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+      with:
+        cache-read-only: true
+    - name: Execute Gradle build with --offline
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --offline
 

.github/workflows/integTest-caching-configuration-cache.yml

@@ -2,17 +2,19 @@ name: Test save/restore configuration-cache state
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
   GRADLE_BUILD_ACTION_CACHE_DEBUG_ENABLED: true
 
 jobs:
   # Run initial Gradle builds to push initial cache entries
   # These builds should start fresh without cache hits, due to the seed injected into the cache key above.
-  seed-build:
+  seed-build-groovy:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-groovy-
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
@@ -20,34 +22,38 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Build with configuration-cache enabled
+    - name: Setup Gradle
+      uses: ./
+    - name: Groovy build with configuration-cache enabled
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --configuration-cache
+
+  configuration-cache-groovy:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-groovy-
+    needs: seed-build-groovy
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test --configuration-cache
-
-  # Test that the project-dot-gradle cache will cache and restore configuration-cache
-  configuration-cache:
-    needs: seed-build
-    strategy:
-      matrix:
-        os: [ubuntu-latest, windows-latest]
-    runs-on: ${{ matrix.os }}
-    steps:
-    - name: Checkout sources
-      uses: actions/checkout@v2
+        cache-read-only: true
     - name: Execute Gradle build and verify cached configuration
-      uses: ./
       env: 
         VERIFY_CACHED_CONFIGURATION: true
-      with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test --configuration-cache
-        cache-read-only: true
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --configuration-cache
 
-  # Check that the build can run when no bundles are restored
-  no-bundles-restored:
-    needs: seed-build
+  # Check that the build can run when no extracted cache entries are restored
+  no-extracted-cache-entries-restored:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-groovy-
+    needs: seed-build-groovy
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
@@ -55,11 +61,67 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Execute Gradle build with no cache artifact bundles restored
+    - name: Setup Gradle with no extracted cache entries restored
+      uses: ./
+      env: 
+        GRADLE_BUILD_ACTION_SKIP_RESTORE: "generated-gradle-jars|wrapper-zips|java-toolchains|instrumented-jars|dependencies|kotlin-dsl"
+      with:
+        cache-read-only: true
+    - name: Check execute Gradle build with configuration cache enabled (but not restored)
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --configuration-cache
+
+  seed-build-kotlin:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-kotlin-
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+    - name: Execute 'help' with configuration-cache enabled
+      working-directory: __tests__/samples/kotlin-dsl
+      run: ./gradlew help --configuration-cache
+
+  modify-build-kotlin:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-kotlin-
+    needs: seed-build-kotlin
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+    - name: Execute 'test' with configuration-cache enabled
+      working-directory: __tests__/samples/kotlin-dsl
+      run: ./gradlew test --configuration-cache
+
+ # Test restore configuration-cache from the third build invocation
+  configuration-cache-kotlin:
+    env:
+      GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-kotlin-
+    needs: modify-build-kotlin
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test --configuration-cache
         cache-read-only: true
-        gradle-home-cache-artifact-bundles: '[]'
-
+    - name: Execute 'test' again and verify cached configuration
+      env: 
+        VERIFY_CACHED_CONFIGURATION: true
+      working-directory: __tests__/samples/kotlin-dsl
+      run: ./gradlew test --configuration-cache

.github/workflows/integTest-caching-gradle-home.yml

@@ -2,15 +2,14 @@ name: Test save/restore Gradle Home directory
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
 
 jobs:
-  # Run initial Gradle builds to push initial cache entries
-  # These builds should start fresh without cache hits, due to the seed injected into the cache key above.
   seed-build:
     strategy:
       matrix:
@@ -19,11 +18,11 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Build using Gradle wrapper
+    - name: Setup Gradle
       uses: ./
-      with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test
+    - name: Build using Gradle wrapper
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test
 
   # Test that the gradle-user-home cache will cache dependencies, by running build with --offline
   dependencies-cache:
@@ -35,12 +34,13 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Execute Gradle build with --offline
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test --offline
         cache-read-only: true
+    - name: Execute Gradle build with --offline
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --offline
 
   # Test that the gradle-user-home cache will cache and restore local build-cache
   build-cache:
@@ -52,15 +52,16 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Execute Gradle build and verify tasks from cache
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test -DverifyCachedBuild=true
         cache-read-only: true
+    - name: Execute Gradle build and verify tasks from cache
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test -DverifyCachedBuild=true
 
-  # Check that the build can run when no bundles are restored
-  no-bundles-restored:
+  # Check that the build can run when Gradle User Home is not fully restored
+  no-extracted-cache-entries-restored:
     needs: seed-build
     strategy:
       matrix:
@@ -69,11 +70,13 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Execute Gradle build with no cache artifact bundles restored
+    - name: Setup Gradle with no extracted cache entries restored
       uses: ./
+      env: 
+        GRADLE_BUILD_ACTION_SKIP_RESTORE: "generated-gradle-jars|wrapper-zips|java-toolchains|instrumented-jars|dependencies|kotlin-dsl"
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test
         cache-read-only: true
-        gradle-home-cache-artifact-bundles: '[]'
+    - name: Check executee Gradle build
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test
 

.github/workflows/integTest-caching-java-toolchain.yml

@@ -0,0 +1,43 @@
+name: Test save/restore java toolchains
+
+on:
+  pull_request:
+    types: [assigned, review_requested]
+  push:
+  workflow_dispatch:
+
+env:
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
+
+jobs:
+  seed-build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+    - name: Build using Gradle wrapper
+      working-directory: __tests__/samples/java-toolchain
+      run: ./gradlew test --info
+
+  # Test that the gradle-user-home cache will cache the toolchain, by running build with --offline
+  toolchain-cache:
+    needs: seed-build
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+      with:
+        cache-read-only: true
+    - name: Execute Gradle build with --offline
+      working-directory: __tests__/samples/java-toolchain
+      run: ./gradlew test --info --offline

.github/workflows/integTest-execution-with-caching.yml

@@ -0,0 +1,43 @@
+name: Test save/restore Gradle state with direct execution
+
+on:
+  pull_request:
+    types: [assigned, review_requested]
+  push:
+  workflow_dispatch:
+
+env:
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
+
+jobs:
+  seed-build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Exucute Gradle build
+      uses: ./
+      with:
+        build-root-directory: __tests__/samples/groovy-dsl
+        arguments: test
+
+  # Test that the gradle-user-home is restored
+  verify-build:
+    needs: seed-build
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Execute Gradle build
+      uses: ./
+      with:
+        cache-read-only: true
+        build-root-directory: __tests__/samples/groovy-dsl
+        arguments: test --offline -DverifyCachedBuild=true
+

.github/workflows/integTest-execution.yml

@@ -2,11 +2,12 @@ name: Test Gradle execution
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
 
 jobs:   
   # Tests for executing with different Gradle versions. 
@@ -44,64 +45,29 @@ jobs:
   gradle-versions:
     strategy:
       matrix:
+        gradle: [7.3, 6.9, 5.6.4, 4.10.3]
         os: [ubuntu-latest, windows-latest]
         include:
-          - os: windows-latest
-            script-suffix: '.bat'
+          - gradle: 5.6.4
+            build-root-suffix: -gradle-5
+          - gradle: 4.10.3
+            build-root-suffix: -gradle-4
     runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Test Gradle 7
+    - name: Run Gradle build
       uses: ./
-      id: gradle7
+      id: gradle
       with:
-        gradle-version: 7.2
-        build-root-directory: __tests__/samples/no-wrapper
-        arguments: help -DgradleVersionCheck=7.2
-    - name: Check Gradle 7 scan
-      if: ${{ !steps.gradle7.outputs.build-scan-url }}
-      uses: actions/github-script@v3
-      with:
-        script: |
-          core.setFailed('No build scan detected')    
-    - name: Test Gradle 6
-      uses: ./
-      id: gradle6
-      with:
-        gradle-version: 6.9
-        build-root-directory: __tests__/samples/no-wrapper
-        arguments: help -DgradleVersionCheck=6.9
-    - name: Check Gradle 6 scan
-      if: ${{ !steps.gradle6.outputs.build-scan-url }}
-      uses: actions/github-script@v3
-      with:
-        script: |
-          core.setFailed('No build scan detected')    
-    - name: Test Gradle 5
-      uses: ./
-      id: gradle5
-      with:
-        gradle-version: 5.6.4
-        build-root-directory: __tests__/samples/no-wrapper-gradle-5
-        arguments: help -DgradleVersionCheck=5.6.4
-    - name: Check Gradle 5 scan
-      if: ${{ !steps.gradle5.outputs.build-scan-url }}
-      uses: actions/github-script@v3
-      with:
-        script: |
-          core.setFailed('No build scan detected')    
-    - name: Test Gradle 4
-      uses: ./
-      id: gradle4
-      with:
-        gradle-version: 4.10.3
-        build-root-directory: __tests__/samples/no-wrapper-gradle-4
-        arguments: help -DgradleVersionCheck=4.10.3
-    - name: Check Gradle 4 scan
-      if: ${{ !steps.gradle4.outputs.build-scan-url }}
+        gradle-version: ${{matrix.gradle}}
+        build-root-directory: __tests__/samples/no-wrapper${{ matrix.build-root-suffix }}
+        arguments: help -DgradleVersionCheck=${{matrix.gradle}}
+    - name: Check build scan url
+      if: ${{ !steps.gradle.outputs.build-scan-url }}
       uses: actions/github-script@v3
       with:
         script: |
           core.setFailed('No build scan detected')    
+  
    

.github/workflows/integTest-gradle-user-home.yml

@@ -2,12 +2,13 @@ name: Test caching with a custom GRADLE_USER_HOME
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
-  GRADLE_USER_HOME: custom/gradle/home
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
+  GRADLE_USER_HOME: ${{github.workspace}}/custom/gradle/home
 
 jobs:
   # Run initial Gradle builds to push initial cache entries
@@ -20,11 +21,11 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Build using Gradle wrapper
+    - name: Setup Gradle
       uses: ./
-      with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test
+    - name: Build using Gradle wrapper
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --info
 
   # Test that the gradle-user-home cache will cache dependencies, by running build with --offline
   dependencies-cache:
@@ -36,12 +37,13 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Execute Gradle build with --offline
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test --offline
         cache-read-only: true
+    - name: Execute Gradle build with --offline
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test --offline --info
 
   # Test that the gradle-user-home cache will cache and restore local build-cache
   build-cache:
@@ -53,9 +55,10 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Execute Gradle build and verify tasks from cache
+    - name: Setup Gradle
       uses: ./
       with:
-        build-root-directory: __tests__/samples/groovy-dsl
-        arguments: test -DverifyCachedBuild=true
         cache-read-only: true
+    - name: Execute Gradle build and verify tasks from cache
+      working-directory: __tests__/samples/groovy-dsl
+      run: ./gradlew test -DverifyCachedBuild=true --info

.github/workflows/integTest-gradle-versions.yml

@@ -0,0 +1,77 @@
+name: Test provision different Gradle versions
+
+on:
+  pull_request:
+    types: [assigned, review_requested]
+  push:
+  workflow_dispatch:
+
+env:
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
+
+jobs:   
+  # Tests for executing with different Gradle versions. 
+  # Each build verifies that it is executed with the expected Gradle version.
+  provision-gradle:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        include:
+          - os: windows-latest
+            script-suffix: '.bat'
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle with v6.9
+      uses: ./
+      with:
+        gradle-version: 6.9
+    - name: Test uses Gradle v6.9
+      working-directory: __tests__/samples/no-wrapper
+      run: gradle help "-DgradleVersionCheck=6.9"
+    - name: Setup Gradle with v7.1.1
+      uses: ./
+      with:
+        gradle-version: 7.1.1
+    - name: Test uses Gradle v7.1.1
+      working-directory: __tests__/samples/no-wrapper
+      run: gradle help "-DgradleVersionCheck=7.1.1"
+    - name: Setup Gradle with release-candidate
+      uses: ./
+      with:
+        gradle-version: release-candidate
+    - name: Test use release-candidate
+      working-directory: __tests__/samples/no-wrapper
+      run: gradle help
+  
+  gradle-versions:
+    strategy:
+      matrix:
+        gradle: [7.3, 6.9, 5.6.4, 4.10.3]
+        os: [ubuntu-latest, windows-latest]
+        include:
+          - gradle: 5.6.4
+            build-root-suffix: -gradle-5
+          - gradle: 4.10.3
+            build-root-suffix: -gradle-4
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+      with:
+        gradle-version: ${{ matrix.gradle }}
+    - name: Run Gradle build
+      id: gradle
+      working-directory: __tests__/samples/no-wrapper${{ matrix.build-root-suffix }}
+      run: gradle help "-DgradleVersionCheck=${{matrix.gradle}}"
+    - name: Check build scan url
+      if: ${{ !steps.gradle.outputs.build-scan-url }}
+      uses: actions/github-script@v3
+      with:
+        script: |
+          core.setFailed('No build scan detected')    
+  
+   

.github/workflows/integTest-sample-gradle-plugin.yml

@@ -0,0 +1,41 @@
+name: Test caching with Gradle Plugin project using TestKit
+
+on:
+  pull_request:
+    types: [assigned, review_requested]
+  push:
+  workflow_dispatch:
+
+env:
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
+  GRADLE_BUILD_ACTION_CACHE_DEBUG_ENABLED: true
+
+jobs:
+  seed-build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+    - name: Build gradle-plugin project
+      working-directory: __tests__/samples/gradle-plugin
+      run: ./gradlew build
+
+  verify-build:
+    needs: seed-build
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout sources
+      uses: actions/checkout@v2
+    - name: Setup Gradle
+      uses: ./
+    - name: Build gradle-plugin project
+      working-directory: __tests__/samples/gradle-plugin
+      run: ./gradlew build --offline

.github/workflows/integTest-sample-kotlin-dsl.yml

@@ -2,15 +2,15 @@ name: Test caching with Kotlin DSL
 
 on:
   pull_request:
+    types: [assigned, review_requested]
   push:
   workflow_dispatch:
 
 env:
-  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}-
+  GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX: ${{github.workflow}}#${{github.run_number}}:${{github.run_attempt}}-
   GRADLE_BUILD_ACTION_CACHE_DEBUG_ENABLED: true
 
 jobs:
-  # Use kotlin-dsl project to verify caching of generated jars and compiled scripts
   seed-build:
     strategy:
       matrix:
@@ -19,13 +19,12 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Build kotlin-dsl project
+    - name: Setup Gradle
       uses: ./
-      with:
-        build-root-directory: __tests__/samples/kotlin-dsl
-        arguments: test
+    - name: Build kotlin-dsl project
+      working-directory: __tests__/samples/kotlin-dsl
+      run: ./gradlew build
 
-  # Check that the build can run --offline
   verify-build:
     needs: seed-build
     strategy:
@@ -35,8 +34,8 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
-    - name: Build kotlin-dsl project
+    - name: Setup Gradle
       uses: ./
-      with:
-        build-root-directory: __tests__/samples/kotlin-dsl
-        arguments: test --offline
+    - name: Build kotlin-dsl project
+      working-directory: __tests__/samples/kotlin-dsl
+      run: ./gradlew build --offline

.github/workflows/pr-build-scan-comment.yml

@@ -0,0 +1,28 @@
+name: Add a build scan comment to PR
+on:
+  pull_request:
+    types: [assigned, review_requested]
+jobs:
+  gradle:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v2
+      with:
+        distribution: temurin
+        java-version: 11
+    - uses: ./
+    - id: gradle
+      working-directory: __tests__/samples/kotlin-dsl
+      run: ./gradlew help
+    - name: "Comment build scan url"
+      uses: actions/github-script@v5
+      with:
+        github-token: ${{secrets.GITHUB_TOKEN}}
+        script: |
+          github.rest.issues.createComment({
+            issue_number: context.issue.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: 'PR ready for review: ${{ steps.gradle.outputs.build-scan-url }}'
+          })

README.md

@@ -1,14 +1,15 @@
 # Execute Gradle builds in GitHub Actions workflows
 
-This GitHub Action can be used to execute a Gradle build on any platform supported by GitHub Actions.
+This GitHub Action can be used to configure Gradle and optionally execute a Gradle build on any platform supported by GitHub Actions.
 
-## Usage
+## Use the action to setup Gradle
 
-The following workflow will run `./gradlew build` on ubuntu, macos and windows. 
-The only prerequisite is to have Java installed: you define the version of Java you need to run the build using the `actions/setup-java` action.
+If you have an existing workflow invoking Gradle, you can add an initial "Setup Gradle" Step to benefit from caching, 
+build-scan capture and other features of the gradle-build-action.
+
+All subsequent Gradle invocations will benefit from this initial setup, via `init` scripts added to the Gradle User Home.
 
 ```yaml
-# .github/workflows/gradle-build-pr.yml
 name: Run Gradle on PRs
 on: pull_request
 jobs:
@@ -19,16 +20,109 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v2
+      with:
+        distribution: temurin
+        java-version: 11
+        
+    - name: Setup Gradle
+      uses: gradle/gradle-build-action@v2
+    
+    - name: Execute Gradle build
+      run: ./gradlew build
+```
+
+## Why use the `gradle-build-action`?
+
+It is possible to directly invoke Gradle in your workflow, and the `actions/setup-java@v2` action provides a simple way to cache Gradle dependencies. 
+
+However, the `gradle-build-action` offers a number of advantages over this approach:
+
+- Easily [run the build with different versions of Gradle](#download-install-and-use-a-specific-gradle-version) using the `gradle-version` parameter. Gradle distributions are automatically downloaded and cached. 
+- More sophisticated and more efficient caching of Gradle User Home between invocations, compared to `setup-java` and most custom configurations using `actions/cache`. [More details below](#caching).
+- Detailed reporting of cache usage and cache configuration options allow you to [optimize the use of the GitHub actions cache](#optimizing-cache-effectiveness).
+- [Automatic capture of build scan links](#build-scans) from the build, making these easier to locate for workflow run.
+
+The `gradle-build-action` is designed to provide these benefits with minimal configuration. 
+These features work both when Gradle is executed via the `gradle-build-action` and for any Gradle execution in subsequent steps.
+
+When using `gradle-build-action` we recommend that you _not_ use `actions/cache` or `actions/setup-java@v2` to explicitly cache the Gradle User Home. Doing so may interfere with the caching provided by this action.
+
+## Use a specific Gradle version
+
+The `gradle-build-action` can download and install a specified Gradle version, adding this installed version to the PATH.
+Downloaded Gradle versions are stored in the GitHub Actions cache, to avoid requiring downloading again later.
+
+```yaml
+ - uses: gradle/gradle-build-action@v2
+   with:
+     gradle-version: 6.5
+```
+
+The `gradle-version` parameter can be set to any valid Gradle version.
+
+Moreover, you can use the following aliases:
+
+| Alias | Selects |
+| --- |---|
+| `wrapper`           | The Gradle wrapper's version (default, useful for matrix builds) |
+| `current`           | The current [stable release](https://gradle.org/install/) |
+| `release-candidate` | The current [release candidate](https://gradle.org/release-candidate/) if any, otherwise fallback to `current` |
+| `nightly`           | The latest [nightly](https://gradle.org/nightly/), fails if none. |
+| `release-nightly`   | The latest [release nightly](https://gradle.org/release-nightly/), fails if none.      |
+
+This can be handy to automatically verify your build works with the latest release candidate of Gradle:
+
+```yaml
+name: Test latest Gradle RC
+on:
+  schedule:
+    - cron: 0 0 * * * # daily
+jobs:
+  gradle-rc:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v2
       with:
         java-version: 11
     - uses: gradle/gradle-build-action@v2
       with:
-        arguments: build
+        gradle-version: release-candidate
+    - run: gradle build --dry-run # just test build configuration
 ```
 
+## Gradle Execution
+
+If the action is configured with an `arguments` input, then Gradle will execute a Gradle build with the arguments provided.
+
+If no `arguments` are provided, the action will not execute Gradle, but will still cache Gradle state and configure build-scan capture for all subsequent Gradle executions.
+
+```yaml
+name: Run Gradle on PRs
+on: pull_request
+jobs:
+  gradle:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-java@v2
+      with:
+        java-version: 11
+    
+    - name: Setup and execute Gradle 'test' task
+      uses: gradle/gradle-build-action@v2
+      with:
+        arguments: test
+```
+
+### Multiple Gradle executions in the same Job
+
 It is possible to configure multiple Gradle executions to run sequentially in the same job. 
-Each invocation will start its run with the filesystem state remaining from the previous execution.
+The initial Action step will perform the Gradle setup.
 
 ```yaml
 - uses: gradle/gradle-build-action@v2
@@ -39,22 +133,7 @@ Each invocation will start its run with the filesystem state remaining from the
     arguments: check
 ```
 
-### Why is this better than running Gradle directly?
-
-It is possible to directly invoke Gradle in your workflow, and the `setup-java` action provides a simple way to cache Gradle dependencies. 
-
-However, the `gradle-build-action` offers a number of advantages over this approach:
-
-- Easily [run the build with different versions of Gradle](#download-install-and-use-a-specific-gradle-version) using the `gradle-version` parameter. Gradle distributions are automatically downloaded and cached. 
-- More sophisticated and more efficient caching of Gradle User Home between invocations, compared to `setup-java` and most custom configurations using `actions/cache`. [More details below](#caching).
-- Detailed reporting of cache usage and cache configuration options allow you to [optimize the use of the GitHub actions cache](#optimizing-cache-effectiveness).
-- [Automatic capture of build scan links](#build-scans) from the build, making these easier to locate for workflow run.
-
-The `gradle-build-action` is designed to provide these benefits with minimal configuration. 
-
-## Gradle Execution
-
-### Command-line arguments
+### Gradle command-line arguments
 
 The `arguments` input can used to pass arbitrary arguments to the `gradle` command line.
 Arguments can be supplied in a single line, or as a multi-line input.
@@ -72,8 +151,6 @@ arguments: |
     -DsystemProperty=bar
 ```
 
-See `gradle --help` for more information.
-
 If you need to pass environment variables, use the GitHub Actions workflow syntax:
 
 ```yaml
@@ -92,6 +169,7 @@ Use the `build-root-directory` input to target a Gradle build in a subdirectory.
 ```yaml
 - uses: gradle/gradle-build-action@v2
   with:
+    arguments: build
     build-root-directory: some/subdirectory
 ```
 
@@ -104,55 +182,12 @@ Use the `gradle-executable` input to execute using a specific Gradle installatio
 ```yaml
  - uses: gradle/gradle-build-action@v2
    with:
+     arguments: build
      gradle-executable: /path/to/installed/gradle
 ```
 
 This mechanism can also be used to target a Gradle wrapper script that is located in a non-default location.
 
-### Download, install and use a specific Gradle version
-
-The `gradle-build-action` is able to download and install a specific Gradle version to execute.
-
-```yaml
- - uses: gradle/gradle-build-action@v2
-   with:
-     gradle-version: 6.5
-```
-
-`gradle-version` can be set to any valid Gradle version.
-
-Moreover, you can use the following aliases:
-
-| Alias | Selects |
-| --- |---|
-| `wrapper`           | The Gradle wrapper's version (default, useful for matrix builds) |
-| `current`           | The current [stable release](https://gradle.org/install/) |
-| `release-candidate` | The current [release candidate](https://gradle.org/release-candidate/) if any, otherwise fallback to `current` |
-| `nightly`           | The latest [nightly](https://gradle.org/nightly/), fails if none. |
-| `release-nightly`   | The latest [release nightly](https://gradle.org/release-nightly/), fails if none.      |
-
-This can be handy to automatically verify your build works with the latest release candidate of Gradle:
-
-```yaml
-# .github/workflows/test-gradle-rc.yml
-name: Test latest Gradle RC
-on:
-  schedule:
-    - cron: 0 0 * * * # daily
-jobs:
-  gradle-rc:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-java@v1
-      with:
-        java-version: 11
-    - uses: gradle/gradle-build-action@v2
-      with:
-        gradle-version: release-candidate
-        arguments: build --dry-run # just test build configuration
-```
-
 ## Caching
 
 By default, this action aims to cache any and all reusable state that may be speed up a subsequent build invocation. 
@@ -257,7 +292,7 @@ and you can selectively [exclude content using `gradle-home-cache-exclude`](#gra
 
 If your build publishes a [build scan](https://gradle.com/build-scans/) the `gradle-build-action` action will:
 - Add a notice with the link to the GitHub Actions user interface
-- Emit the link to the published build scan as an output named `build-scan-url`.
+- For each step that executes Gradle, adds the link to the published build scan as a Step output named `build-scan-url`.
 
 You can then use that link in subsequent actions of your workflow. For example:
 
@@ -270,20 +305,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v2
       with:
+        distribution: temurin
         java-version: 11
     - uses: gradle/gradle-build-action@v2
-      id: gradle
-      with:
-        arguments: build
+    - id: gradle
+      run: ./gradlew build
     - name: "Comment build scan url"
-      uses: actions/github-script@v3
+      uses: actions/github-script@v5
       if: github.event_name == 'pull_request' && failure()
       with:
         github-token: ${{secrets.GITHUB_TOKEN}}
         script: |
-          github.issues.createComment({
+          github.rest.issues.createComment({
             issue_number: context.issue.number,
             owner: context.repo.owner,
             repo: context.repo.repo,

__tests__/cache-reporting.test.ts

@@ -1,4 +1,4 @@
-import {CacheEntryListener, CacheListener} from '../src/cache-base'
+import {CacheEntryListener, CacheListener} from '../src/cache-reporting'
 
 describe('caching report', () => {
     describe('reports not fully restored', () => {

__tests__/samples/gradle-plugin/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

__tests__/samples/gradle-plugin/gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

__tests__/samples/gradle-plugin/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

__tests__/samples/gradle-plugin/plugin/build.gradle

@@ -0,0 +1,60 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Gradle plugin project to get you started.
+ * For more details take a look at the Writing Custom Plugins chapter in the Gradle
+ * User Manual available at https://docs.gradle.org/7.3/userguide/custom_plugins.html
+ * This project uses @Incubating APIs which are subject to change.
+ */
+
+plugins {
+    // Apply the Java Gradle plugin development plugin to add support for developing Gradle plugins
+    id 'java-gradle-plugin'
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+testing {
+    suites {
+        // Configure the built-in test suite
+        test {
+            // Use JUnit Jupiter test framework
+            useJUnitJupiter('5.7.2')
+        }
+
+        // Create a new test suite
+        functionalTest(JvmTestSuite) {
+            dependencies {
+                // functionalTest test suite depends on the production code in tests
+                implementation project
+            }
+
+            targets {
+                all {
+                    // This test suite should run after the built-in test suite has run its tests
+                    testTask.configure { shouldRunAfter(test) } 
+                }
+            }
+        }
+    }
+}
+
+gradlePlugin {
+    // Define the plugin
+    plugins {
+        greeting {
+            id = 'org.example.gradle.plugin.greeting'
+            implementationClass = 'org.example.gradle.plugin.GradlePluginPlugin'
+        }
+    }
+}
+
+gradlePlugin.testSourceSets(sourceSets.functionalTest)
+
+tasks.named('check') {
+    // Include functionalTest as part of the check lifecycle
+    dependsOn(testing.suites.functionalTest)
+}

__tests__/samples/gradle-plugin/plugin/src/functionalTest/java/org/example/gradle/plugin/GradlePluginPluginFunctionalTest.java

@@ -0,0 +1,57 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package org.example.gradle.plugin;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.Writer;
+import java.io.FileWriter;
+import java.nio.file.Files;
+import org.gradle.testkit.runner.GradleRunner;
+import org.gradle.testkit.runner.BuildResult;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * A simple functional test for the 'org.example.gradle.plugin.greeting' plugin.
+ */
+class GradlePluginPluginFunctionalTest {
+    @TempDir
+    File projectDir;
+
+    private File getBuildFile() {
+        return new File(projectDir, "build.gradle");
+    }
+
+    private File getSettingsFile() {
+        return new File(projectDir, "settings.gradle");
+    }
+
+    @Test void canRunTaskWithGradle691() throws IOException {
+        writeString(getSettingsFile(), "");
+        writeString(getBuildFile(),
+            "plugins {" +
+            "  id('org.example.gradle.plugin.greeting')" +
+            "}");
+
+        // Run the build
+        GradleRunner runner = GradleRunner.create();
+        runner.forwardOutput();
+        runner.withGradleVersion("6.9.1");
+        runner.withPluginClasspath();
+        runner.withArguments("greeting");
+        runner.withProjectDir(projectDir);
+        BuildResult result = runner.build();
+
+        // Verify the result
+        assertTrue(result.getOutput().contains("Hello from plugin 'org.example.gradle.plugin.greeting'"));
+    }
+
+    private void writeString(File file, String string) throws IOException {
+        try (Writer writer = new FileWriter(file)) {
+            writer.write(string);
+        }
+    }
+}

__tests__/samples/gradle-plugin/plugin/src/main/java/org/example/gradle/plugin/GradlePluginPlugin.java

@@ -0,0 +1,19 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package org.example.gradle.plugin;
+
+import org.gradle.api.Project;
+import org.gradle.api.Plugin;
+
+/**
+ * A simple 'hello world' plugin.
+ */
+public class GradlePluginPlugin implements Plugin<Project> {
+    public void apply(Project project) {
+        // Register a task
+        project.getTasks().register("greeting", task -> {
+            task.doLast(s -> System.out.println("Hello from plugin 'org.example.gradle.plugin.greeting'"));
+        });
+    }
+}

__tests__/samples/gradle-plugin/plugin/src/test/java/org/example/gradle/plugin/GradlePluginPluginTest.java

@@ -0,0 +1,23 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package org.example.gradle.plugin;
+
+import org.gradle.testfixtures.ProjectBuilder;
+import org.gradle.api.Project;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * A simple unit test for the 'org.example.gradle.plugin.greeting' plugin.
+ */
+class GradlePluginPluginTest {
+    @Test void pluginRegistersATask() {
+        // Create a test project and apply the plugin
+        Project project = ProjectBuilder.builder().build();
+        project.getPlugins().apply("org.example.gradle.plugin.greeting");
+
+        // Verify the result
+        assertNotNull(project.getTasks().findByName("greeting"));
+    }
+}

__tests__/samples/gradle-plugin/settings.gradle

@@ -0,0 +1,12 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ *
+ * Detailed information about configuring a multi-project build in Gradle can be found
+ * in the user manual at https://docs.gradle.org/7.3/userguide/multi_project_builds.html
+ * This project uses @Incubating APIs which are subject to change.
+ */
+
+rootProject.name = 'gradle-plugin'
+include('plugin')

__tests__/samples/java-toolchain/build.gradle

@@ -0,0 +1,17 @@
+plugins {
+    id 'java'
+}
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(16)
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation('junit:junit:4.12')
+}

__tests__/samples/java-toolchain/gradle.properties

@@ -0,0 +1 @@
+org.gradle.caching=true

__tests__/samples/java-toolchain/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

__tests__/samples/java-toolchain/gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

__tests__/samples/java-toolchain/gradlew.bat

@@ -0,0 +1,104 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

__tests__/samples/java-toolchain/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'basic'

__tests__/samples/java-toolchain/src/test/java/basic/BasicTest.java

@@ -0,0 +1,10 @@
+package basic;
+
+import org.junit.Test;
+
+public class BasicTest {
+    @Test
+    public void test() {
+        assert true;
+    }
+}

__tests__/samples/kotlin-dsl/build.gradle.kts

@@ -16,3 +16,15 @@ dependencies {
 tasks.test {
     useJUnitPlatform()
 }
+
+tasks.named("test").configure {
+    // Use an environment variable to bypass config-cache checks
+    if (System.getenv("VERIFY_CACHED_CONFIGURATION") != null) {
+        throw RuntimeException("Configuration was not cached: unexpected configuration of test task")
+    }
+    doLast {
+        if (System.getProperties().containsKey("verifyCachedBuild")) {
+            throw RuntimeException("Build was not cached: unexpected execution of test task")
+        }
+    }
+}

action.yml

@@ -1,25 +1,13 @@
 name: "Gradle Build Action"
-description: 'Executes a Gradle build, caching useful state in the GitHub actions cache'
+description: 'Configures Gradle for use in GitHub actions, caching useful state in the GitHub actions cache'
 
 # https://help.github.com/en/articles/metadata-syntax-for-github-actions
 
 inputs:
-  gradle-executable:
-    description: Path to the Gradle executable
-    required: false
-
   gradle-version:
     description: Gradle version to use
     required: false
 
-  build-root-directory:
-    description: Path to the root directory of the build
-    required: false
-
-  arguments:
-    description: Gradle command line arguments (supports multi-line input)
-    required: false
-
   cache-disabled:
     description: When 'true', all caching is disabled. No entries will be written to or read from the cache.
     required: false
@@ -42,30 +30,38 @@ inputs:
   gradle-home-cache-excludes:
     description: Paths within Gradle User Home to exclude from cache.
     required: false
-  
   # e.g. Use the following setting to prevent the local build cache from being saved/restored
   #      gradle-home-cache-excludes: |
-  #           ["caches/build-cache-1"]
+  #           caches/build-cache-1
 
-  # EXPERIMENTAL & INTERNAL CONFIGURATION PROPERTIES
+  arguments:
+    description: Gradle command line arguments (supports multi-line input)
+    required: false
+
+  build-root-directory:
+    description: Path to the root directory of the build
+    required: false
+
+  gradle-executable:
+    description: Path to the Gradle executable
+    required: false
+
+  # EXPERIMENTAL & INTERNAL ACTION INPUTS
   # The following action properties allow fine-grained tweaking of the action caching behaviour.
-  # These properties are not designed for production use, and may change without notice in a subsequent release of `gradle-build-action`.
+  # These properties are experimental and not (yet) designed for production use, and may change without notice in a subsequent release of `gradle-build-action`.
   # Use at your own risk!
+  cache-write-only:
+    description: When 'true', entries will not be restored from the cache but will be saved at the end of the Job. This allows a 'clean' cache entry to be written.
+    required: false
+    default: false
+  gradle-home-cache-strict-match:
+    description: When 'true', the action will not attempt to restore the Gradle User Home entries from other Jobs.
+    required: false
+    default: false
   workflow-job-context:
     description: Used to uniquely identify the current job invocation. Defaults to the matrix values for this job; this should not be overridden by users (INTERNAL).
     required: false
     default: ${{ toJSON(matrix) }}
-  gradle-home-cache-artifact-bundles:
-    description: Names and patterns of artifact bundles to cache separately. (EXPERIMENTAL - may be changed/removed without notice)
-    required: false
-    default: |
-        [
-          ["generated-gradle-jars", "caches/*/generated-gradle-jars/*.jar"],
-          ["wrapper-zips", "wrapper/dists/*/*/*.zip"],
-          ["dependencies", "caches/modules-*/files-*/*/*/*/*/"],
-          ["instrumented-jars", "caches/jars-*/*/"],
-          ["kotlin-dsl", "caches/*/kotlin-dsl/*/*/"]
-        ]
 
 outputs:
   build-scan-url:
@@ -75,7 +71,6 @@ runs:
   using: 'node12'
   main: 'dist/main/index.js'
   post: 'dist/post/index.js'
-  post-if: success()
 
 branding:
   icon: 'box'

package.json

@@ -24,8 +24,8 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "@actions/cache": "1.0.7",
-    "@actions/core": "1.5.0",
+    "@actions/cache": "1.0.8",
+    "@actions/core": "1.6.0",
     "@actions/exec": "1.1.0",
     "@actions/github": "5.0.0",
     "@actions/glob": "0.2.0",
@@ -35,19 +35,19 @@
     "string-argv": "0.3.1"
   },
   "devDependencies": {
-    "@types/jest": "27.0.2",
-    "@types/node": "14.17.3",
+    "@types/jest": "27.0.3",
+    "@types/node": "16.11.11",
     "@types/unzipper": "0.10.4",
-    "@typescript-eslint/parser": "4.28.2",
+    "@typescript-eslint/parser": "5.5.0",
     "@zeit/ncc": "0.22.3",
-    "eslint": "7.30.0",
-    "eslint-plugin-github": "4.1.3",
-    "eslint-plugin-jest": "24.3.6",
-    "jest": "27.3.1",
-    "jest-circus": "27.3.1",
-    "js-yaml": "3.14.1",
-    "prettier": "2.3.2",
+    "eslint": "8.3.0",
+    "eslint-plugin-github": "4.3.5",
+    "eslint-plugin-jest": "25.3.0",
+    "jest": "27.4.3",
+    "jest-circus": "27.4.2",
+    "js-yaml": "4.1.0",
+    "prettier": "2.5.0",
     "ts-jest": "27.0.7",
-    "typescript": "4.3.5"
+    "typescript": "4.5.2"
   }
 }

patches/@actions+cache+1.0.8.patch

@@ -30,7 +30,7 @@ index 805a8e5..d3ab419 100644
 -export declare function saveCache(paths: string[], key: string, options?: UploadOptions): Promise<number>;
 +export declare function saveCache(paths: string[], key: string, options?: UploadOptions): Promise<CacheEntry>;
 diff --git a/node_modules/@actions/cache/lib/cache.js b/node_modules/@actions/cache/lib/cache.js
-index df78fe0..540114f 100644
+index e3c43e6..c947d02 100644
 --- a/node_modules/@actions/cache/lib/cache.js
 +++ b/node_modules/@actions/cache/lib/cache.js
 @@ -37,6 +37,13 @@ class ReserveCacheError extends Error {
@@ -58,7 +58,7 @@ index df78fe0..540114f 100644
 @@ -91,6 +99,7 @@ function restoreCache(paths, primaryKey, restoreKeys, options) {
                  yield tar_1.listTar(archivePath, compressionMethod);
              }
-             const archiveFileSize = utils.getArchiveFileSizeIsBytes(archivePath);
+             const archiveFileSize = utils.getArchiveFileSizeInBytes(archivePath);
 +            restoredEntry.size = archiveFileSize;
              core.info(`Cache Size: ~${Math.round(archiveFileSize / (1024 * 1024))} MB (${archiveFileSize} B)`);
              yield tar_1.extractTar(archivePath, compressionMethod);
@@ -72,21 +72,37 @@ index df78fe0..540114f 100644
      });
  }
  exports.restoreCache = restoreCache;
-@@ -147,7 +156,7 @@ function saveCache(paths, key, options) {
+@@ -135,6 +144,7 @@ function saveCache(paths, key, options) {
+         const archiveFolder = yield utils.createTempDirectory();
+         const archivePath = path.join(archiveFolder, utils.getCacheFileName(compressionMethod));
+         core.debug(`Archive Path: ${archivePath}`);
++        const savedEntry = new CacheEntry(key);
+         try {
+             yield tar_1.createTar(archiveFolder, cachePaths, compressionMethod);
+             if (core.isDebug()) {
+@@ -142,6 +152,7 @@ function saveCache(paths, key, options) {
+             }
+             const fileSizeLimit = 10 * 1024 * 1024 * 1024; // 10GB per repo limit
+             const archiveFileSize = utils.getArchiveFileSizeInBytes(archivePath);
++            savedEntry.size = archiveFileSize;
+             core.debug(`File Size: ${archiveFileSize}`);
+             if (archiveFileSize > fileSizeLimit) {
+                 throw new Error(`Cache size of ~${Math.round(archiveFileSize / (1024 * 1024))} MB (${archiveFileSize} B) is over the 10GB limit, not saving cache.`);
+@@ -158,7 +169,7 @@ function saveCache(paths, key, options) {
+                 core.debug(`Failed to delete archive: ${error}`);
+             }
          }
-         core.debug(`Saving Cache (ID: ${cacheId})`);
-         yield cacheHttpClient.saveCache(cacheId, archivePath, options);
 -        return cacheId;
-+        return new CacheEntry(key, archiveFileSize);
++        return savedEntry;
      });
  }
  exports.saveCache = saveCache;
 diff --git a/node_modules/@actions/cache/lib/cache.js.map b/node_modules/@actions/cache/lib/cache.js.map
-index 05fc369..41b9189 100644
+index ec474b2..7e09719 100644
 --- a/node_modules/@actions/cache/lib/cache.js.map
 +++ b/node_modules/@actions/cache/lib/cache.js.map
 @@ -1 +1 @@
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 \ No newline at end of file

src/build-scan-capture.ts

@@ -1,50 +0,0 @@
-import fs from 'fs'
-import path from 'path'
-import * as core from '@actions/core'
-
-export function writeInitScript(): string {
-    const tmpDir = process.env['RUNNER_TEMP'] || ''
-    const initScript = path.resolve(tmpDir, 'build-scan-capture.init.gradle')
-    core.info(`Writing init script: ${initScript}`)
-    if (fs.existsSync(initScript)) {
-        return initScript
-    }
-    fs.writeFileSync(
-        initScript,
-        `
-import org.gradle.util.GradleVersion
-
-// Don't run against the included builds (if the main build has any).
-def isTopLevelBuild = gradle.getParent() == null
-if (isTopLevelBuild) {
-    def version = GradleVersion.current().baseVersion
-    def atLeastGradle4 = version >= GradleVersion.version("4.0")
-    def atLeastGradle6 = version >= GradleVersion.version("6.0")
-
-    if (atLeastGradle6) {
-        settingsEvaluated { settings ->
-            if (settings.pluginManager.hasPlugin("com.gradle.enterprise")) {
-                registerCallbacks(settings.extensions["gradleEnterprise"].buildScan, settings.rootProject.name)
-            }
-        }
-    } else if (atLeastGradle4) {
-        projectsEvaluated { gradle ->
-            if (gradle.rootProject.pluginManager.hasPlugin("com.gradle.build-scan")) {
-                registerCallbacks(gradle.rootProject.extensions["buildScan"], gradle.rootProject.name)
-            }
-        }
-    }
-}
-
-def registerCallbacks(buildScanExtension, rootProjectName) {
-    buildScanExtension.with {
-        def scanFile = new File("gradle-build-scan.txt")
-        buildScanPublished { buildScan ->
-            scanFile.text = buildScan.buildScanUri
-        }
-    }
-}
-`
-    )
-    return initScript
-}

src/cache-base.ts

@@ -1,35 +1,34 @@
 import * as core from '@actions/core'
-import * as cache from '@actions/cache'
+import * as exec from '@actions/exec'
 import * as github from '@actions/github'
-import {isCacheDebuggingEnabled, getCacheKeyPrefix, hashStrings, handleCacheFailure} from './cache-utils'
+import path from 'path'
+import fs from 'fs'
+import {CacheListener} from './cache-reporting'
+import {
+    getCacheKeyPrefix,
+    determineJobContext,
+    saveCache,
+    restoreCache,
+    cacheDebug,
+    isCacheDebuggingEnabled,
+    tryDelete
+} from './cache-utils'
+import {ConfigurationCacheEntryExtractor, GradleHomeEntryExtractor} from './cache-extract-entries'
 
-const JOB_CONTEXT_PARAMETER = 'workflow-job-context'
+const CACHE_PROTOCOL_VERSION = 'v6-'
+const RESTORED_CACHE_KEY_KEY = 'restored-cache-key'
 
-function generateCacheKey(cacheName: string): CacheKey {
-    const cacheKeyPrefix = getCacheKeyPrefix()
-
-    // At the most general level, share caches for all executions on the same OS
-    const runnerOs = process.env['RUNNER_OS'] || ''
-    const cacheKeyForOs = `${cacheKeyPrefix}${cacheName}|${runnerOs}`
-
-    // Prefer caches that run this job
-    const cacheKeyForJob = `${cacheKeyForOs}|${github.context.job}`
-
-    // Prefer (even more) jobs that run this job with the same context (matrix)
-    const cacheKeyForJobContext = `${cacheKeyForJob}[${determineJobContext()}]`
-
-    // Exact match on Git SHA
-    const cacheKey = `${cacheKeyForJobContext}-${github.context.sha}`
-
-    return new CacheKey(cacheKey, [cacheKeyForJobContext, cacheKeyForJob, cacheKeyForOs])
-}
-
-function determineJobContext(): string {
-    // By default, we hash the full `matrix` data for the run, to uniquely identify this job invocation
-    const workflowJobContext = core.getInput(JOB_CONTEXT_PARAMETER)
-    return hashStrings([workflowJobContext])
-}
+export const META_FILE_DIR = '.gradle-build-action'
+export const PROJECT_ROOTS_FILE = 'project-roots.txt'
+const INCLUDE_PATHS_PARAMETER = 'gradle-home-cache-includes'
+const EXCLUDE_PATHS_PARAMETER = 'gradle-home-cache-excludes'
+const STRICT_CACHE_MATCH_PARAMETER = 'gradle-home-cache-strict-match'
 
+/**
+ * Represents a key used to restore a cache entry.
+ * The Github Actions cache will first try for an exact match on the key.
+ * If that fails, it will try for a prefix match on any of the restoreKeys.
+ */
 class CacheKey {
     key: string
     restoreKeys: string[]
@@ -40,118 +39,101 @@ class CacheKey {
     }
 }
 
-export class CacheListener {
-    cacheEntries: CacheEntryListener[] = []
+/**
+ * Generates a cache key specific to the current job execution.
+ * The key is constructed from the following inputs:
+ * - A user-defined prefix (optional)
+ * - The cache protocol version
+ * - The name of the cache
+ * - The runner operating system
+ * - The name of the Job being executed
+ * - The matrix values for the Job being executed (job context)
+ * - The SHA of the commit being executed
+ *
+ * Caches are restored by trying to match the these key prefixes in order:
+ * - The full key with SHA
+ * - A previous key for this Job + matrix
+ * - Any previous key for this Job (any matrix)
+ * - Any previous key for this cache on the current OS
+ */
+function generateCacheKey(cacheName: string): CacheKey {
+    const cacheKeyBase = `${getCacheKeyPrefix()}${CACHE_PROTOCOL_VERSION}${cacheName}`
 
-    get fullyRestored(): boolean {
-        return this.cacheEntries.every(x => !x.wasRequestedButNotRestored())
+    // At the most general level, share caches for all executions on the same OS
+    const runnerOs = process.env['RUNNER_OS'] || ''
+    const cacheKeyForOs = `${cacheKeyBase}|${runnerOs}`
+
+    // Prefer caches that run this job
+    const cacheKeyForJob = `${cacheKeyForOs}|${github.context.job}`
+
+    // Prefer (even more) jobs that run this job with the same context (matrix)
+    const cacheKeyForJobContext = `${cacheKeyForJob}[${determineJobContext()}]`
+
+    // Exact match on Git SHA
+    const cacheKey = `${cacheKeyForJobContext}-${github.context.sha}`
+
+    if (core.getBooleanInput(STRICT_CACHE_MATCH_PARAMETER)) {
+        return new CacheKey(cacheKey, [cacheKeyForJobContext])
     }
 
-    entry(name: string): CacheEntryListener {
-        for (const entry of this.cacheEntries) {
-            if (entry.entryName === name) {
-                return entry
-            }
-        }
-
-        const newEntry = new CacheEntryListener(name)
-        this.cacheEntries.push(newEntry)
-        return newEntry
-    }
-
-    stringify(): string {
-        return JSON.stringify(this)
-    }
-
-    static rehydrate(stringRep: string): CacheListener {
-        const rehydrated: CacheListener = Object.assign(new CacheListener(), JSON.parse(stringRep))
-        const entries = rehydrated.cacheEntries
-        for (let index = 0; index < entries.length; index++) {
-            const rawEntry = entries[index]
-            entries[index] = Object.assign(new CacheEntryListener(rawEntry.entryName), rawEntry)
-        }
-        return rehydrated
-    }
+    return new CacheKey(cacheKey, [cacheKeyForJobContext, cacheKeyForJob, cacheKeyForOs])
 }
 
-export class CacheEntryListener {
-    entryName: string
-    requestedKey: string | undefined
-    requestedRestoreKeys: string[] | undefined
-    restoredKey: string | undefined
-    restoredSize: number | undefined
-
-    savedKey: string | undefined
-    savedSize: number | undefined
-
-    constructor(entryName: string) {
-        this.entryName = entryName
-    }
-
-    wasRequestedButNotRestored(): boolean {
-        return this.requestedKey !== undefined && this.restoredKey === undefined
-    }
-
-    markRequested(key: string, restoreKeys: string[] = []): CacheEntryListener {
-        this.requestedKey = key
-        this.requestedRestoreKeys = restoreKeys
-        return this
-    }
-
-    markRestored(key: string, size: number | undefined): CacheEntryListener {
-        this.restoredKey = key
-        this.restoredSize = size
-        return this
-    }
-
-    markSaved(key: string, size: number | undefined): CacheEntryListener {
-        this.savedKey = key
-        this.savedSize = size
-        return this
-    }
-}
-
-export abstract class AbstractCache {
+export class GradleStateCache {
     private cacheName: string
     private cacheDescription: string
-    private cacheKeyStateKey: string
-    private cacheResultStateKey: string
 
-    protected readonly cacheDebuggingEnabled: boolean
+    protected readonly gradleUserHome: string
 
-    constructor(cacheName: string, cacheDescription: string) {
-        this.cacheName = cacheName
-        this.cacheDescription = cacheDescription
-        this.cacheKeyStateKey = `CACHE_KEY_${cacheName}`
-        this.cacheResultStateKey = `CACHE_RESULT_${cacheName}`
-        this.cacheDebuggingEnabled = isCacheDebuggingEnabled()
+    constructor(gradleUserHome: string) {
+        this.gradleUserHome = gradleUserHome
+        this.cacheName = 'gradle'
+        this.cacheDescription = 'Gradle User Home'
     }
 
-    async restore(listener: CacheListener): Promise<void> {
-        if (this.cacheOutputExists()) {
-            core.info(`${this.cacheDescription} already exists. Not restoring from cache.`)
-            return
+    init(): void {
+        const actionCacheDir = path.resolve(this.gradleUserHome, '.gradle-build-action')
+        fs.mkdirSync(actionCacheDir, {recursive: true})
+
+        const initScriptsDir = path.resolve(this.gradleUserHome, 'init.d')
+        fs.mkdirSync(initScriptsDir, {recursive: true})
+
+        this.initializeGradleUserHome(this.gradleUserHome, initScriptsDir)
+    }
+
+    cacheOutputExists(): boolean {
+        const paths = this.getCachePath()
+        for (const p of paths) {
+            if (fs.existsSync(p)) {
+                cacheDebug(`Cache output exists at ${p}`)
+                return true
+            }
         }
+        return false
+    }
 
-        const cacheKey = this.prepareCacheKey()
-        const entryReport = listener.entry(this.cacheDescription)
-        entryReport.markRequested(cacheKey.key, cacheKey.restoreKeys)
+    /**
+     * Restores the cache entry, finding the closest match to the currently running job.
+     */
+    async restore(listener: CacheListener): Promise<void> {
+        const entryListener = listener.entry(this.cacheDescription)
 
-        this.debug(
+        const cacheKey = generateCacheKey(this.cacheName)
+
+        cacheDebug(
             `Requesting ${this.cacheDescription} with
-                key:${cacheKey.key}
-                restoreKeys:[${cacheKey.restoreKeys}]`
+    key:${cacheKey.key}
+    restoreKeys:[${cacheKey.restoreKeys}]`
         )
 
-        const cacheResult = await this.restoreCache(this.getCachePath(), cacheKey.key, cacheKey.restoreKeys)
-
+        const cacheResult = await restoreCache(this.getCachePath(), cacheKey.key, cacheKey.restoreKeys, entryListener)
         if (!cacheResult) {
-            core.info(`${this.cacheDescription} cache not found. Will start with empty.`)
+            core.info(`${this.cacheDescription} cache not found. Will initialize empty.`)
             return
         }
 
-        core.saveState(this.cacheResultStateKey, cacheResult.key)
-        entryReport.markRestored(cacheResult.key, cacheResult.size)
+        core.saveState(RESTORED_CACHE_KEY_KEY, cacheResult.key)
+
         core.info(`Restored ${this.cacheDescription} from cache key: ${cacheResult.key}`)
 
         try {
@@ -161,43 +143,28 @@ export abstract class AbstractCache {
         }
     }
 
-    prepareCacheKey(): CacheKey {
-        const cacheKey = generateCacheKey(this.cacheName)
-
-        core.saveState(this.cacheKeyStateKey, cacheKey.key)
-        return cacheKey
+    /**
+     * Restore any extracted cache entries after the main Gradle User Home entry is restored.
+     */
+    async afterRestore(listener: CacheListener): Promise<void> {
+        await this.debugReportGradleUserHomeSize('as restored from cache')
+        await new GradleHomeEntryExtractor(this.gradleUserHome).restore(listener)
+        await new ConfigurationCacheEntryExtractor(this.gradleUserHome).restore(listener)
+        await this.debugReportGradleUserHomeSize('after restoring common artifacts')
     }
 
-    protected async restoreCache(
-        cachePath: string[],
-        cacheKey: string,
-        cacheRestoreKeys: string[] = []
-    ): Promise<cache.CacheEntry | undefined> {
-        try {
-            return await cache.restoreCache(cachePath, cacheKey, cacheRestoreKeys)
-        } catch (error) {
-            handleCacheFailure(error, `Failed to restore ${cacheKey}`)
-            return undefined
-        }
-    }
-
-    protected async afterRestore(_listener: CacheListener): Promise<void> {}
-
+    /**
+     * Saves the cache entry based on the current cache key unless the cache was restored with the exact key,
+     * in which case we cannot overwrite it.
+     *
+     * If the cache entry was restored with a partial match on a restore key, then
+     * it is saved with the exact key.
+     */
     async save(listener: CacheListener): Promise<void> {
-        if (!this.cacheOutputExists()) {
-            this.debug(`No ${this.cacheDescription} to cache.`)
-            return
-        }
+        const cacheKey = generateCacheKey(this.cacheName).key
+        const restoredCacheKey = core.getState(RESTORED_CACHE_KEY_KEY)
 
-        const cacheKey = core.getState(this.cacheKeyStateKey)
-        const cacheResult = core.getState(this.cacheResultStateKey)
-
-        if (!cacheKey) {
-            this.debug(`${this.cacheDescription} existed prior to cache restore. Not saving.`)
-            return
-        }
-
-        if (cacheResult && cacheKey === cacheResult) {
+        if (restoredCacheKey && cacheKey === restoredCacheKey) {
             core.info(`Cache hit occurred on the cache key ${cacheKey}, not saving cache.`)
             return
         }
@@ -211,34 +178,165 @@ export abstract class AbstractCache {
 
         core.info(`Caching ${this.cacheDescription} with cache key: ${cacheKey}`)
         const cachePath = this.getCachePath()
-        const savedEntry = await this.saveCache(cachePath, cacheKey)
-
-        if (savedEntry) {
-            listener.entry(this.cacheDescription).markSaved(savedEntry.key, savedEntry.size)
-        }
+        const entryListener = listener.entry(this.cacheDescription)
+        await saveCache(cachePath, cacheKey, entryListener)
 
         return
     }
 
-    protected async beforeSave(_listener: CacheListener): Promise<void> {}
-
-    protected async saveCache(cachePath: string[], cacheKey: string): Promise<cache.CacheEntry | undefined> {
-        try {
-            return await cache.saveCache(cachePath, cacheKey)
-        } catch (error) {
-            handleCacheFailure(error, `Failed to save cache entry ${cacheKey}`)
-        }
-        return undefined
+    /**
+     * Extract and save any defined extracted cache entries prior to the main Gradle User Home entry being saved.
+     */
+    async beforeSave(listener: CacheListener): Promise<void> {
+        await this.debugReportGradleUserHomeSize('before saving common artifacts')
+        this.deleteExcludedPaths()
+        await Promise.all([
+            new GradleHomeEntryExtractor(this.gradleUserHome).extract(listener),
+            new ConfigurationCacheEntryExtractor(this.gradleUserHome).extract(listener)
+        ])
+        await this.debugReportGradleUserHomeSize(
+            "after extracting common artifacts (only 'caches' and 'notifications' will be stored)"
+        )
     }
 
-    protected debug(message: string): void {
-        if (this.cacheDebuggingEnabled) {
-            core.info(message)
-        } else {
-            core.debug(message)
+    /**
+     * Delete any file paths that are excluded by the `gradle-home-cache-excludes` parameter.
+     */
+    private deleteExcludedPaths(): void {
+        const rawPaths: string[] = core.getMultilineInput(EXCLUDE_PATHS_PARAMETER)
+        const resolvedPaths = rawPaths.map(x => path.resolve(this.gradleUserHome, x))
+
+        for (const p of resolvedPaths) {
+            cacheDebug(`Deleting excluded path: ${p}`)
+            tryDelete(p)
         }
     }
 
-    protected abstract cacheOutputExists(): boolean
-    protected abstract getCachePath(): string[]
+    /**
+     * Determines the paths within Gradle User Home to cache.
+     * By default, this is the 'caches' and 'notifications' directories,
+     * but this can be overridden by the `gradle-home-cache-includes` parameter.
+     */
+    protected getCachePath(): string[] {
+        const rawPaths: string[] = core.getMultilineInput(INCLUDE_PATHS_PARAMETER)
+        rawPaths.push(META_FILE_DIR)
+        const resolvedPaths = rawPaths.map(x => this.resolveCachePath(x))
+        cacheDebug(`Using cache paths: ${resolvedPaths}`)
+        return resolvedPaths
+    }
+
+    private resolveCachePath(rawPath: string): string {
+        if (rawPath.startsWith('!')) {
+            const resolved = this.resolveCachePath(rawPath.substring(1))
+            return `!${resolved}`
+        }
+        return path.resolve(this.gradleUserHome, rawPath)
+    }
+
+    private initializeGradleUserHome(gradleUserHome: string, initScriptsDir: string): void {
+        const propertiesFile = path.resolve(gradleUserHome, 'gradle.properties')
+        fs.writeFileSync(propertiesFile, 'org.gradle.daemon=false')
+
+        const buildScanCapture = path.resolve(initScriptsDir, 'build-scan-capture.init.gradle')
+        fs.writeFileSync(
+            buildScanCapture,
+            `import org.gradle.util.GradleVersion
+
+// Only run against root build. Do not run against included builds.
+def isTopLevelBuild = gradle.getParent() == null
+if (isTopLevelBuild) {
+    def version = GradleVersion.current().baseVersion
+    def atLeastGradle4 = version >= GradleVersion.version("4.0")
+    def atLeastGradle6 = version >= GradleVersion.version("6.0")
+
+    if (atLeastGradle6) {
+        settingsEvaluated { settings ->
+            if (settings.pluginManager.hasPlugin("com.gradle.enterprise")) {
+                registerCallbacks(settings.extensions["gradleEnterprise"].buildScan, settings.rootProject.name)
+            }
+        }
+    } else if (atLeastGradle4) {
+        projectsEvaluated { gradle ->
+            if (gradle.rootProject.pluginManager.hasPlugin("com.gradle.build-scan")) {
+                registerCallbacks(gradle.rootProject.extensions["buildScan"], gradle.rootProject.name)
+            }
+        }
+    }
+}
+
+def registerCallbacks(buildScanExtension, rootProjectName) {
+    buildScanExtension.with {
+        def scanFile = new File("gradle-build-scan.txt")
+        def buildFailed = false
+
+        buildFinished { result ->
+            buildFailed = (result.failure != null)
+        }
+
+        buildScanPublished { buildScan ->
+            scanFile.text = buildScan.buildScanUri
+
+            // Send commands directly to GitHub Actions via STDOUT.
+            def gradleCommand = rootProjectName + " " + gradle.startParameter.taskNames.join(" ")
+            if (buildFailed) {
+                println("::warning ::Gradle build '\${gradleCommand}' FAILED - \${buildScan.buildScanUri}")
+            } else {
+                println("::notice ::Gradle build '\${gradleCommand}' - \${buildScan.buildScanUri}")
+            }
+            println("::set-output name=build-scan-url::\${buildScan.buildScanUri}")
+        }
+    }
+}`
+        )
+
+        const projectRootCapture = path.resolve(initScriptsDir, 'project-root-capture.init.gradle')
+        fs.writeFileSync(
+            projectRootCapture,
+            `
+// Only run against root build. Do not run against included builds.
+def isTopLevelBuild = gradle.getParent() == null
+if (isTopLevelBuild) {
+    settingsEvaluated { settings ->
+        def projectRootEntry = settings.rootDir.absolutePath + "\\n"
+        def projectRootList = new File(settings.gradle.gradleUserHomeDir, "${PROJECT_ROOTS_FILE}")
+        if (!projectRootList.exists() || !projectRootList.text.contains(projectRootEntry)) {
+            projectRootList << projectRootEntry
+        }
+    }
+}`
+        )
+    }
+
+    /**
+     * When cache debugging is enabled, this method will give a detailed report
+     * of the Gradle User Home contents.
+     */
+    private async debugReportGradleUserHomeSize(label: string): Promise<void> {
+        if (!isCacheDebuggingEnabled()) {
+            return
+        }
+        if (!fs.existsSync(this.gradleUserHome)) {
+            return
+        }
+        const result = await exec.getExecOutput('du', ['-h', '-c', '-t', '5M'], {
+            cwd: this.gradleUserHome,
+            silent: true,
+            ignoreReturnCode: true
+        })
+
+        core.info(`Gradle User Home (directories >5M): ${label}`)
+
+        core.info(
+            result.stdout
+                .trimEnd()
+                .replace(/\t/g, '    ')
+                .split('\n')
+                .map(it => {
+                    return `  ${it}`
+                })
+                .join('\n')
+        )
+
+        core.info('-----------------------')
+    }
 }

src/cache-extract-entries.ts

@@ -0,0 +1,370 @@
+import path from 'path'
+import fs from 'fs'
+import * as core from '@actions/core'
+import * as glob from '@actions/glob'
+
+import {META_FILE_DIR, PROJECT_ROOTS_FILE} from './cache-base'
+import {CacheEntryListener, CacheListener} from './cache-reporting'
+import {
+    cacheDebug,
+    getCacheKeyPrefix,
+    hashFileNames,
+    isCacheDebuggingEnabled,
+    restoreCache,
+    saveCache,
+    tryDelete
+} from './cache-utils'
+
+const SKIP_RESTORE_VAR = 'GRADLE_BUILD_ACTION_SKIP_RESTORE'
+
+/**
+ * Represents the result of attempting to load or store an extracted cache entry.
+ * An undefined cacheKey indicates that the operation did not succeed.
+ * The collected results are then used to populate the `cache-metadata.json` file for later use.
+ */
+class ExtractedCacheEntry {
+    artifactType: string
+    pattern: string
+    cacheKey: string | undefined
+
+    constructor(artifactType: string, pattern: string, cacheKey: string | undefined) {
+        this.artifactType = artifactType
+        this.pattern = pattern
+        this.cacheKey = cacheKey
+    }
+}
+
+/**
+ * Representation of all of the extracted cache entries for this Gradle User Home.
+ * This object is persisted to JSON file in the Gradle User Home directory for storing,
+ * and subsequently used to restore the Gradle User Home.
+ */
+class ExtractedCacheEntryMetadata {
+    entries: ExtractedCacheEntry[] = []
+}
+
+/**
+ * The specification for a type of extracted cache entry.
+ */
+class ExtractedCacheEntryDefinition {
+    artifactType: string
+    pattern: string
+    bundle: boolean
+    uniqueFileNames = true
+
+    constructor(artifactType: string, pattern: string, bundle: boolean) {
+        this.artifactType = artifactType
+        this.pattern = pattern
+        this.bundle = bundle
+    }
+
+    withNonUniqueFileNames(): ExtractedCacheEntryDefinition {
+        this.uniqueFileNames = false
+        return this
+    }
+}
+
+/**
+ * Caches and restores the entire Gradle User Home directory, extracting entries containing common artifacts
+ * for more efficient storage.
+ */
+abstract class AbstractEntryExtractor {
+    protected readonly gradleUserHome: string
+    private extractorName: string
+
+    constructor(gradleUserHome: string, extractorName: string) {
+        this.gradleUserHome = gradleUserHome
+        this.extractorName = extractorName
+    }
+
+    /**
+     * Restores any artifacts that were cached separately, based on the information in the `cache-metadata.json` file.
+     * Each extracted cache entry is restored in parallel, except when debugging is enabled.
+     */
+    async restore(listener: CacheListener): Promise<void> {
+        const previouslyExtractedCacheEntries = this.loadExtractedCacheEntries()
+
+        const processes: Promise<ExtractedCacheEntry>[] = []
+
+        for (const cacheEntry of previouslyExtractedCacheEntries) {
+            const artifactType = cacheEntry.artifactType
+            const entryListener = listener.entry(cacheEntry.pattern)
+
+            // Handle case where the extracted-cache-entry definitions have been changed
+            const skipRestore = process.env[SKIP_RESTORE_VAR] || ''
+            if (skipRestore.includes(artifactType)) {
+                core.info(`Not restoring extracted cache entry for ${artifactType}`)
+                entryListener.markRequested('SKIP_RESTORE')
+            } else {
+                processes.push(
+                    this.awaitForDebugging(
+                        this.restoreExtractedCacheEntry(
+                            artifactType,
+                            cacheEntry.cacheKey!,
+                            cacheEntry.pattern,
+                            entryListener
+                        )
+                    )
+                )
+            }
+        }
+
+        this.saveMetadataForCacheResults(await Promise.all(processes))
+    }
+
+    private async restoreExtractedCacheEntry(
+        artifactType: string,
+        cacheKey: string,
+        pattern: string,
+        listener: CacheEntryListener
+    ): Promise<ExtractedCacheEntry> {
+        const restoredEntry = await restoreCache([pattern], cacheKey, [], listener)
+        if (restoredEntry) {
+            core.info(`Restored ${artifactType} with key ${cacheKey} to ${pattern}`)
+            return new ExtractedCacheEntry(artifactType, pattern, cacheKey)
+        } else {
+            core.info(`Did not restore ${artifactType} with key ${cacheKey} to ${pattern}`)
+            return new ExtractedCacheEntry(artifactType, pattern, undefined)
+        }
+    }
+
+    /**
+     * Saves any artifacts that are configured to be cached separately, based on the extracted cache entry definitions.
+     * Each entry is extracted and saved in parallel, except when debugging is enabled.
+     */
+    async extract(listener: CacheListener): Promise<void> {
+        // Load the cache entry definitions (from config) and the previously restored entries (from persisted metadata file)
+        const cacheEntryDefinitions = this.getExtractedCacheEntryDefinitions()
+        cacheDebug(
+            `Extracting cache entries for ${this.extractorName}: ${JSON.stringify(cacheEntryDefinitions, null, 2)}`
+        )
+
+        const previouslyRestoredEntries = this.loadExtractedCacheEntries()
+        const cacheActions: Promise<ExtractedCacheEntry>[] = []
+
+        // For each cache entry definition, determine if it has already been restored, and if not, extract it
+        for (const cacheEntryDefinition of cacheEntryDefinitions) {
+            const artifactType = cacheEntryDefinition.artifactType
+            const pattern = cacheEntryDefinition.pattern
+
+            // Find all matching files for this cache entry definition
+            const globber = await glob.create(pattern, {
+                implicitDescendants: false,
+                followSymbolicLinks: false
+            })
+            const matchingFiles = await globber.glob()
+
+            if (matchingFiles.length === 0) {
+                cacheDebug(`No files found to cache for ${artifactType}`)
+                continue
+            }
+
+            if (cacheEntryDefinition.bundle) {
+                // For an extracted "bundle", use the defined pattern and cache all matching files in a single entry.
+                cacheActions.push(
+                    this.awaitForDebugging(
+                        this.saveExtractedCacheEntry(
+                            matchingFiles,
+                            artifactType,
+                            pattern,
+                            cacheEntryDefinition.uniqueFileNames,
+                            previouslyRestoredEntries,
+                            listener.entry(pattern)
+                        )
+                    )
+                )
+            } else {
+                // Otherwise cache each matching file in a separate entry, using the complete file path as the cache pattern.
+                for (const cacheFile of matchingFiles) {
+                    cacheActions.push(
+                        this.awaitForDebugging(
+                            this.saveExtractedCacheEntry(
+                                [cacheFile],
+                                artifactType,
+                                cacheFile,
+                                cacheEntryDefinition.uniqueFileNames,
+                                previouslyRestoredEntries,
+                                listener.entry(cacheFile)
+                            )
+                        )
+                    )
+                }
+            }
+        }
+
+        this.saveMetadataForCacheResults(await Promise.all(cacheActions))
+    }
+
+    private async saveExtractedCacheEntry(
+        matchingFiles: string[],
+        artifactType: string,
+        pattern: string,
+        uniqueFileNames: boolean,
+        previouslyRestoredEntries: ExtractedCacheEntry[],
+        entryListener: CacheEntryListener
+    ): Promise<ExtractedCacheEntry> {
+        const cacheKey = uniqueFileNames
+            ? this.createCacheKeyFromFileNames(artifactType, matchingFiles)
+            : await this.createCacheKeyFromFileContents(artifactType, pattern)
+        const previouslyRestoredKey = previouslyRestoredEntries.find(
+            x => x.artifactType === artifactType && x.pattern === pattern
+        )?.cacheKey
+
+        if (previouslyRestoredKey === cacheKey) {
+            cacheDebug(`No change to previously restored ${artifactType}. Not saving.`)
+        } else {
+            core.info(`Caching ${artifactType} with path '${pattern}' and cache key: ${cacheKey}`)
+            await saveCache([pattern], cacheKey, entryListener)
+        }
+
+        for (const file of matchingFiles) {
+            tryDelete(file)
+        }
+
+        return new ExtractedCacheEntry(artifactType, pattern, cacheKey)
+    }
+
+    protected createCacheKeyFromFileNames(artifactType: string, files: string[]): string {
+        const cacheKeyPrefix = getCacheKeyPrefix()
+        const relativeFiles = files.map(x => path.relative(this.gradleUserHome, x))
+        const key = hashFileNames(relativeFiles)
+
+        cacheDebug(`Generating cache key for ${artifactType} from file names: ${relativeFiles}`)
+
+        return `${cacheKeyPrefix}${artifactType}-${key}`
+    }
+
+    protected async createCacheKeyFromFileContents(artifactType: string, pattern: string): Promise<string> {
+        const cacheKeyPrefix = getCacheKeyPrefix()
+        const key = await glob.hashFiles(pattern)
+
+        cacheDebug(`Generating cache key for ${artifactType} from files matching: ${pattern}`)
+
+        return `${cacheKeyPrefix}${artifactType}-${key}`
+    }
+
+    // Run actions sequentially if debugging is enabled
+    private async awaitForDebugging(p: Promise<ExtractedCacheEntry>): Promise<ExtractedCacheEntry> {
+        if (isCacheDebuggingEnabled()) {
+            await p
+        }
+        return p
+    }
+
+    /**
+     * Load information about the extracted cache entries previously restored/saved. This is loaded from the 'cache-metadata.json' file.
+     */
+    protected loadExtractedCacheEntries(): ExtractedCacheEntry[] {
+        const cacheMetadataFile = this.getCacheMetadataFile()
+        if (!fs.existsSync(cacheMetadataFile)) {
+            return []
+        }
+
+        const filedata = fs.readFileSync(cacheMetadataFile, 'utf-8')
+        cacheDebug(`Loaded cache metadata: ${filedata}`)
+        const extractedCacheEntryMetadata = JSON.parse(filedata) as ExtractedCacheEntryMetadata
+        return extractedCacheEntryMetadata.entries
+    }
+
+    /**
+     * Saves information about the extracted cache entries into the 'cache-metadata.json' file.
+     */
+    private saveMetadataForCacheResults(results: ExtractedCacheEntry[]): void {
+        const extractedCacheEntryMetadata = new ExtractedCacheEntryMetadata()
+        extractedCacheEntryMetadata.entries = results.filter(x => x.cacheKey !== undefined)
+
+        const filedata = JSON.stringify(extractedCacheEntryMetadata)
+        cacheDebug(`Saving cache metadata: ${filedata}`)
+
+        fs.writeFileSync(this.getCacheMetadataFile(), filedata, 'utf-8')
+    }
+
+    private getCacheMetadataFile(): string {
+        const actionMetadataDirectory = path.resolve(this.gradleUserHome, META_FILE_DIR)
+        fs.mkdirSync(actionMetadataDirectory, {recursive: true})
+
+        return path.resolve(actionMetadataDirectory, `${this.extractorName}-entry-metadata.json`)
+    }
+
+    protected abstract getExtractedCacheEntryDefinitions(): ExtractedCacheEntryDefinition[]
+}
+
+export class GradleHomeEntryExtractor extends AbstractEntryExtractor {
+    constructor(gradleUserHome: string) {
+        super(gradleUserHome, 'gradle-home')
+    }
+
+    /**
+     * Return the extracted cache entry definitions, which determine which artifacts will be cached
+     * separately from the rest of the Gradle User Home cache entry.
+     */
+    protected getExtractedCacheEntryDefinitions(): ExtractedCacheEntryDefinition[] {
+        const entryDefinition = (
+            artifactType: string,
+            patterns: string[],
+            bundle: boolean
+        ): ExtractedCacheEntryDefinition => {
+            const resolvedPattern = patterns.map(x => path.resolve(this.gradleUserHome, x)).join('\n')
+            return new ExtractedCacheEntryDefinition(artifactType, resolvedPattern, bundle)
+        }
+
+        return [
+            entryDefinition('generated-gradle-jars', ['caches/*/generated-gradle-jars/*.jar'], false),
+            entryDefinition('wrapper-zips', ['wrapper/dists/*/*/*.zip'], false),
+            entryDefinition('java-toolchains', ['jdks/*.zip', 'jdks/*.tar.gz'], false),
+            entryDefinition('dependencies', ['caches/modules-*/files-*/*/*/*/*'], true),
+            entryDefinition('instrumented-jars', ['caches/jars-*/*'], true),
+            entryDefinition('kotlin-dsl', ['caches/*/kotlin-dsl/*/*'], true)
+        ]
+    }
+}
+
+export class ConfigurationCacheEntryExtractor extends AbstractEntryExtractor {
+    constructor(gradleUserHome: string) {
+        super(gradleUserHome, 'configuration-cache')
+    }
+
+    /**
+     * Handle the case where Gradle User Home has not been fully restored, so that the configuration-cache
+     * entry is not reusable.
+     */
+    async restore(listener: CacheListener): Promise<void> {
+        if (listener.fullyRestored) {
+            return super.restore(listener)
+        }
+
+        core.info('Not restoring configuration-cache state, as Gradle User Home was not fully restored')
+        for (const cacheEntry of this.loadExtractedCacheEntries()) {
+            listener.entry(cacheEntry.pattern).markRequested('NOT_RESTORED')
+        }
+    }
+
+    /**
+     * Extract cache entries for the configuration cache in each project.
+     */
+    protected getExtractedCacheEntryDefinitions(): ExtractedCacheEntryDefinition[] {
+        return this.getProjectRoots().map(projectRoot => {
+            const configCachePath = path.resolve(projectRoot, '.gradle/configuration-cache')
+            return new ExtractedCacheEntryDefinition(
+                'configuration-cache',
+                configCachePath,
+                true
+            ).withNonUniqueFileNames()
+        })
+    }
+
+    /**
+     * For every Gradle invocation, we record the project root directory. This method returns the entire
+     * set of project roots, to allow saving of configuration-cache entries for each.
+     */
+    private getProjectRoots(): string[] {
+        const projectList = path.resolve(this.gradleUserHome, PROJECT_ROOTS_FILE)
+        if (!fs.existsSync(projectList)) {
+            core.info(`Missing project list file ${projectList}`)
+            return []
+        }
+        const projectRoots = fs.readFileSync(projectList, 'utf-8')
+        core.info(`Found project roots '${projectRoots}' in ${projectList}`)
+        return projectRoots.trim().split('\n')
+    }
+}

src/cache-gradle-user-home.ts

@@ -1,256 +0,0 @@
-import path from 'path'
-import fs from 'fs'
-import os from 'os'
-import * as core from '@actions/core'
-import * as glob from '@actions/glob'
-import * as exec from '@actions/exec'
-
-import {AbstractCache, CacheEntryListener, CacheListener} from './cache-base'
-import {getCacheKeyPrefix, hashFileNames, tryDelete} from './cache-utils'
-
-const META_FILE_DIR = '.gradle-build-action'
-
-const INCLUDE_PATHS_PARAMETER = 'gradle-home-cache-includes'
-const EXCLUDE_PATHS_PARAMETER = 'gradle-home-cache-excludes'
-const ARTIFACT_BUNDLES_PARAMETER = 'gradle-home-cache-artifact-bundles'
-
-export class GradleUserHomeCache extends AbstractCache {
-    private gradleUserHome: string
-
-    constructor(rootDir: string) {
-        super('gradle', 'Gradle User Home')
-        this.gradleUserHome = this.determineGradleUserHome(rootDir)
-    }
-
-    async afterRestore(listener: CacheListener): Promise<void> {
-        await this.reportGradleUserHomeSize('as restored from cache')
-        await this.restoreArtifactBundles(listener)
-        await this.reportGradleUserHomeSize('after restoring common artifacts')
-    }
-
-    private async restoreArtifactBundles(listener: CacheListener): Promise<void> {
-        const processes: Promise<void>[] = []
-
-        const bundleMetaFiles = await this.getBundleMetaFiles()
-        const bundlePatterns = this.getArtifactBundles()
-
-        // Iterate over all bundle meta files and try to restore
-        for (const bundleMetaFile of bundleMetaFiles) {
-            const bundle = path.basename(bundleMetaFile, '.cache')
-            const entryListener = listener.entry(bundle)
-            const bundlePattern = bundlePatterns.get(bundle)
-
-            // Handle case where the 'artifactBundlePatterns' have been changed
-            if (bundlePattern === undefined) {
-                core.info(`Found bundle metafile for ${bundle} but no such bundle defined`)
-                entryListener.markRequested('BUNDLE_NOT_CONFIGURED')
-                tryDelete(bundleMetaFile)
-            } else {
-                const p = this.restoreArtifactBundle(bundle, bundlePattern, bundleMetaFile, entryListener)
-                // Run sequentially when debugging enabled
-                if (this.cacheDebuggingEnabled) {
-                    await p
-                }
-                processes.push(p)
-            }
-        }
-
-        await Promise.all(processes)
-    }
-
-    private async restoreArtifactBundle(
-        bundle: string,
-        bundlePattern: string,
-        bundleMetaFile: string,
-        listener: CacheEntryListener
-    ): Promise<void> {
-        const cacheKey = fs.readFileSync(bundleMetaFile, 'utf-8').trim()
-        listener.markRequested(cacheKey)
-
-        const restoredEntry = await this.restoreCache([bundlePattern], cacheKey)
-        if (restoredEntry) {
-            core.info(`Restored ${bundle} with key ${cacheKey} to ${bundlePattern}`)
-            listener.markRestored(restoredEntry.key, restoredEntry.size)
-        } else {
-            core.info(`Did not restore ${bundle} with key ${cacheKey} to ${bundlePattern}`)
-            tryDelete(bundleMetaFile)
-        }
-    }
-
-    private getBundleMetaFile(name: string): string {
-        return path.resolve(this.gradleUserHome, META_FILE_DIR, `${name}.cache`)
-    }
-
-    private async getBundleMetaFiles(): Promise<string[]> {
-        const metaFiles = path.resolve(this.gradleUserHome, META_FILE_DIR, '*.cache')
-        const globber = await glob.create(metaFiles)
-        const bundleFiles = await globber.glob()
-        return bundleFiles
-    }
-
-    async beforeSave(listener: CacheListener): Promise<void> {
-        await this.reportGradleUserHomeSize('before saving common artifacts')
-        this.removeExcludedPaths()
-        await this.saveArtifactBundles(listener)
-        await this.reportGradleUserHomeSize(
-            "after saving common artifacts (only 'caches' and 'notifications' will be stored)"
-        )
-    }
-
-    private removeExcludedPaths(): void {
-        const rawPaths: string[] = core.getMultilineInput(EXCLUDE_PATHS_PARAMETER)
-        const resolvedPaths = rawPaths.map(x => path.resolve(this.gradleUserHome, x))
-
-        for (const p of resolvedPaths) {
-            this.debug(`Deleting excluded path: ${p}`)
-            tryDelete(p)
-        }
-    }
-
-    private async saveArtifactBundles(listener: CacheListener): Promise<void> {
-        const processes: Promise<void>[] = []
-        for (const [bundle, pattern] of this.getArtifactBundles()) {
-            const entryListener = listener.entry(bundle)
-
-            const p = this.saveArtifactBundle(bundle, pattern, entryListener)
-            // Run sequentially when debugging enabled
-            if (this.cacheDebuggingEnabled) {
-                await p
-            }
-            processes.push(p)
-        }
-
-        await Promise.all(processes)
-    }
-
-    private async saveArtifactBundle(
-        bundle: string,
-        artifactPath: string,
-        listener: CacheEntryListener
-    ): Promise<void> {
-        const bundleMetaFile = this.getBundleMetaFile(bundle)
-
-        const globber = await glob.create(artifactPath, {
-            implicitDescendants: false,
-            followSymbolicLinks: false
-        })
-        const bundleFiles = await globber.glob()
-
-        // Handle no matching files
-        if (bundleFiles.length === 0) {
-            this.debug(`No files found to cache for ${bundle}`)
-            if (fs.existsSync(bundleMetaFile)) {
-                tryDelete(bundleMetaFile)
-            }
-            return
-        }
-
-        const previouslyRestoredKey = fs.existsSync(bundleMetaFile)
-            ? fs.readFileSync(bundleMetaFile, 'utf-8').trim()
-            : ''
-        const cacheKey = this.createCacheKey(bundle, bundleFiles)
-
-        if (previouslyRestoredKey === cacheKey) {
-            this.debug(`No change to previously restored ${bundle}. Not caching.`)
-        } else {
-            core.info(`Caching ${bundle} with cache key: ${cacheKey}`)
-            const savedEntry = await this.saveCache([artifactPath], cacheKey)
-            if (savedEntry !== undefined) {
-                this.writeBundleMetaFile(bundleMetaFile, cacheKey)
-                listener.markSaved(savedEntry.key, savedEntry.size)
-            }
-        }
-
-        for (const file of bundleFiles) {
-            tryDelete(file)
-        }
-    }
-
-    protected createCacheKey(bundle: string, files: string[]): string {
-        const cacheKeyPrefix = getCacheKeyPrefix()
-        const relativeFiles = files.map(x => path.relative(this.gradleUserHome, x))
-        const key = hashFileNames(relativeFiles)
-
-        this.debug(`Generating cache key for ${bundle} from files: ${relativeFiles}`)
-
-        return `${cacheKeyPrefix}${bundle}-${key}`
-    }
-
-    private writeBundleMetaFile(metaFile: string, cacheKey: string): void {
-        this.debug(`Writing bundle metafile: ${metaFile}`)
-
-        const dirName = path.dirname(metaFile)
-        if (!fs.existsSync(dirName)) {
-            fs.mkdirSync(dirName)
-        }
-
-        fs.writeFileSync(metaFile, cacheKey)
-    }
-
-    protected determineGradleUserHome(rootDir: string): string {
-        const customGradleUserHome = process.env['GRADLE_USER_HOME']
-        if (customGradleUserHome) {
-            return path.resolve(rootDir, customGradleUserHome)
-        }
-
-        return path.resolve(os.homedir(), '.gradle')
-    }
-
-    protected cacheOutputExists(): boolean {
-        // Need to check for 'caches' directory to avoid incorrect detection on MacOS agents
-        const dir = path.resolve(this.gradleUserHome, 'caches')
-        return fs.existsSync(dir)
-    }
-
-    protected getCachePath(): string[] {
-        const rawPaths: string[] = core.getMultilineInput(INCLUDE_PATHS_PARAMETER)
-        rawPaths.push(META_FILE_DIR)
-        const resolvedPaths = rawPaths.map(x => this.resolveCachePath(x))
-        this.debug(`Using cache paths: ${resolvedPaths}`)
-        return resolvedPaths
-    }
-
-    private resolveCachePath(rawPath: string): string {
-        if (rawPath.startsWith('!')) {
-            const resolved = this.resolveCachePath(rawPath.substring(1))
-            return `!${resolved}`
-        }
-        return path.resolve(this.gradleUserHome, rawPath)
-    }
-
-    private getArtifactBundles(): Map<string, string> {
-        const artifactBundleDefinition = core.getInput(ARTIFACT_BUNDLES_PARAMETER)
-        this.debug(`Using artifact bundle definition: ${artifactBundleDefinition}`)
-        const artifactBundles = JSON.parse(artifactBundleDefinition)
-        return new Map(Array.from(artifactBundles, ([key, value]) => [key, path.resolve(this.gradleUserHome, value)]))
-    }
-
-    private async reportGradleUserHomeSize(label: string): Promise<void> {
-        if (!this.cacheDebuggingEnabled) {
-            return
-        }
-        if (!fs.existsSync(this.gradleUserHome)) {
-            return
-        }
-        const result = await exec.getExecOutput('du', ['-h', '-c', '-t', '5M'], {
-            cwd: this.gradleUserHome,
-            silent: true,
-            ignoreReturnCode: true
-        })
-
-        core.info(`Gradle User Home (directories >5M): ${label}`)
-
-        core.info(
-            result.stdout
-                .trimEnd()
-                .replace(/\t/g, '    ')
-                .split('\n')
-                .map(it => {
-                    return `  ${it}`
-                })
-                .join('\n')
-        )
-
-        core.info('-----------------------')
-    }
-}

src/cache-project-dot-gradle.ts

@@ -1,30 +0,0 @@
-import path from 'path'
-import fs from 'fs'
-import {AbstractCache} from './cache-base'
-
-// TODO: Maybe allow the user to override / tweak this set
-const PATHS_TO_CACHE = [
-    'configuration-cache' // Only configuration-cache is stored at present
-]
-
-export class ProjectDotGradleCache extends AbstractCache {
-    private rootDir: string
-    constructor(rootDir: string) {
-        super('project', 'Project configuration cache')
-        this.rootDir = rootDir
-    }
-
-    protected cacheOutputExists(): boolean {
-        const dir = this.getProjectDotGradleDir()
-        return fs.existsSync(dir)
-    }
-
-    protected getCachePath(): string[] {
-        const dir = this.getProjectDotGradleDir()
-        return PATHS_TO_CACHE.map(x => path.resolve(dir, x))
-    }
-
-    private getProjectDotGradleDir(): string {
-        return path.resolve(this.rootDir, '.gradle')
-    }
-}

src/cache-reporting.ts

@@ -0,0 +1,138 @@
+import * as core from '@actions/core'
+
+/**
+ * Collects information on what entries were saved and restored during the action.
+ * This information is used to generate a summary of the cache usage.
+ */
+export class CacheListener {
+    cacheEntries: CacheEntryListener[] = []
+
+    get fullyRestored(): boolean {
+        return this.cacheEntries.every(x => !x.wasRequestedButNotRestored())
+    }
+
+    entry(name: string): CacheEntryListener {
+        for (const entry of this.cacheEntries) {
+            if (entry.entryName === name) {
+                return entry
+            }
+        }
+
+        const newEntry = new CacheEntryListener(name)
+        this.cacheEntries.push(newEntry)
+        return newEntry
+    }
+
+    stringify(): string {
+        return JSON.stringify(this)
+    }
+
+    static rehydrate(stringRep: string): CacheListener {
+        if (stringRep === '') {
+            return new CacheListener()
+        }
+        const rehydrated: CacheListener = Object.assign(new CacheListener(), JSON.parse(stringRep))
+        const entries = rehydrated.cacheEntries
+        for (let index = 0; index < entries.length; index++) {
+            const rawEntry = entries[index]
+            entries[index] = Object.assign(new CacheEntryListener(rawEntry.entryName), rawEntry)
+        }
+        return rehydrated
+    }
+}
+
+/**
+ * Collects information on the state of a single cache entry.
+ */
+export class CacheEntryListener {
+    entryName: string
+    requestedKey: string | undefined
+    requestedRestoreKeys: string[] | undefined
+    restoredKey: string | undefined
+    restoredSize: number | undefined
+
+    savedKey: string | undefined
+    savedSize: number | undefined
+
+    constructor(entryName: string) {
+        this.entryName = entryName
+    }
+
+    wasRequestedButNotRestored(): boolean {
+        return this.requestedKey !== undefined && this.restoredKey === undefined
+    }
+
+    markRequested(key: string, restoreKeys: string[] = []): CacheEntryListener {
+        this.requestedKey = key
+        this.requestedRestoreKeys = restoreKeys
+        return this
+    }
+
+    markRestored(key: string, size: number | undefined): CacheEntryListener {
+        this.restoredKey = key
+        this.restoredSize = size
+        return this
+    }
+
+    markSaved(key: string, size: number | undefined): CacheEntryListener {
+        this.savedKey = key
+        this.savedSize = size
+        return this
+    }
+
+    markAlreadyExists(key: string): CacheEntryListener {
+        this.savedKey = key
+        this.savedSize = 0
+        return this
+    }
+}
+
+export function logCachingReport(listener: CacheListener): void {
+    if (listener.cacheEntries.length === 0) {
+        return
+    }
+
+    core.info(`---------- Caching Summary -------------
+Restored Entries Count: ${getCount(listener.cacheEntries, e => e.restoredSize)}
+                  Size: ${getSum(listener.cacheEntries, e => e.restoredSize)}
+Saved Entries    Count: ${getCount(listener.cacheEntries, e => e.savedSize)}
+                  Size: ${getSum(listener.cacheEntries, e => e.savedSize)}`)
+
+    core.startGroup('Cache Entry details')
+    for (const entry of listener.cacheEntries) {
+        core.info(`Entry: ${entry.entryName}
+    Requested Key : ${entry.requestedKey ?? ''}
+    Restored  Key : ${entry.restoredKey ?? ''}
+              Size: ${formatSize(entry.restoredSize)}
+    Saved     Key : ${entry.savedKey ?? ''}
+              Size: ${formatSize(entry.savedSize)}`)
+    }
+    core.endGroup()
+}
+
+function getCount(
+    cacheEntries: CacheEntryListener[],
+    predicate: (value: CacheEntryListener) => number | undefined
+): number {
+    return cacheEntries.filter(e => predicate(e) !== undefined).length
+}
+
+function getSum(
+    cacheEntries: CacheEntryListener[],
+    predicate: (value: CacheEntryListener) => number | undefined
+): string {
+    if (cacheEntries.length === 0) {
+        return '0'
+    }
+    return formatSize(cacheEntries.map(e => predicate(e) ?? 0).reduce((p, v) => p + v, 0))
+}
+
+function formatSize(bytes: number | undefined): string {
+    if (bytes === undefined) {
+        return ''
+    }
+    if (bytes === 0) {
+        return '0 (Entry already exists)'
+    }
+    return `${Math.round(bytes / (1024 * 1024))} MB (${bytes} B)`
+}

src/cache-utils.ts

@@ -4,10 +4,12 @@ import * as crypto from 'crypto'
 import * as path from 'path'
 import * as fs from 'fs'
 
-const CACHE_PROTOCOL_VERSION = 'v4-'
+import {CacheEntryListener} from './cache-reporting'
 
+const JOB_CONTEXT_PARAMETER = 'workflow-job-context'
 const CACHE_DISABLED_PARAMETER = 'cache-disabled'
 const CACHE_READONLY_PARAMETER = 'cache-read-only'
+const CACHE_WRITEONLY_PARAMETER = 'cache-write-only'
 const CACHE_DEBUG_VAR = 'GRADLE_BUILD_ACTION_CACHE_DEBUG_ENABLED'
 const CACHE_PREFIX_VAR = 'GRADLE_BUILD_ACTION_CACHE_KEY_PREFIX'
 
@@ -19,13 +21,28 @@ export function isCacheReadOnly(): boolean {
     return core.getBooleanInput(CACHE_READONLY_PARAMETER)
 }
 
+export function isCacheWriteOnly(): boolean {
+    return core.getBooleanInput(CACHE_WRITEONLY_PARAMETER)
+}
+
 export function isCacheDebuggingEnabled(): boolean {
     return process.env[CACHE_DEBUG_VAR] ? true : false
 }
 
 export function getCacheKeyPrefix(): string {
     // Prefix can be used to force change all cache keys (defaults to cache protocol version)
-    return process.env[CACHE_PREFIX_VAR] || CACHE_PROTOCOL_VERSION
+    return process.env[CACHE_PREFIX_VAR] || ''
+}
+
+export function determineJobContext(): string {
+    // By default, we hash the full `matrix` data for the run, to uniquely identify this job invocation
+    // The only way we can obtain the `matrix` data is via the `workflow-job-context` parameter in action.yml.
+    const workflowJobContext = core.getInput(JOB_CONTEXT_PARAMETER)
+    return hashStrings([workflowJobContext])
+}
+
+export function hashFileNames(fileNames: string[]): string {
+    return hashStrings(fileNames.map(x => x.replace(new RegExp(`\\${path.sep}`, 'g'), '/')))
 }
 
 export function hashStrings(values: string[]): string {
@@ -36,8 +53,43 @@ export function hashStrings(values: string[]): string {
     return hash.digest('hex')
 }
 
-export function hashFileNames(fileNames: string[]): string {
-    return hashStrings(fileNames.map(x => x.replace(new RegExp(`\\${path.sep}`, 'g'), '/')))
+export async function restoreCache(
+    cachePath: string[],
+    cacheKey: string,
+    cacheRestoreKeys: string[],
+    listener: CacheEntryListener
+): Promise<cache.CacheEntry | undefined> {
+    listener.markRequested(cacheKey, cacheRestoreKeys)
+    try {
+        const restoredEntry = await cache.restoreCache(cachePath, cacheKey, cacheRestoreKeys)
+        if (restoredEntry !== undefined) {
+            listener.markRestored(restoredEntry.key, restoredEntry.size)
+        }
+        return restoredEntry
+    } catch (error) {
+        handleCacheFailure(error, `Failed to restore ${cacheKey}`)
+        return undefined
+    }
+}
+
+export async function saveCache(cachePath: string[], cacheKey: string, listener: CacheEntryListener): Promise<void> {
+    try {
+        const savedEntry = await cache.saveCache(cachePath, cacheKey)
+        listener.markSaved(savedEntry.key, savedEntry.size)
+    } catch (error) {
+        if (error instanceof cache.ReserveCacheError) {
+            listener.markAlreadyExists(cacheKey)
+        }
+        handleCacheFailure(error, `Failed to save cache entry ${cacheKey}`)
+    }
+}
+
+export function cacheDebug(message: string): void {
+    if (isCacheDebuggingEnabled()) {
+        core.info(message)
+    } else {
+        core.debug(message)
+    }
 }
 
 export function handleCacheFailure(error: unknown, message: string): void {
@@ -47,11 +99,7 @@ export function handleCacheFailure(error: unknown, message: string): void {
     }
     if (error instanceof cache.ReserveCacheError) {
         // Reserve cache errors are expected if the artifact has been previously cached
-        if (isCacheDebuggingEnabled()) {
-            core.info(message)
-        } else {
-            core.debug(message)
-        }
+        core.info(`${message}: ${error}`)
     } else {
         // Warn on all other errors
         core.warning(`${message}: ${error}`)

src/caches.ts

@@ -1,39 +1,60 @@
-import {GradleUserHomeCache} from './cache-gradle-user-home'
-import {ProjectDotGradleCache} from './cache-project-dot-gradle'
 import * as core from '@actions/core'
-import {isCacheDisabled, isCacheReadOnly} from './cache-utils'
-import {CacheEntryListener, CacheListener} from './cache-base'
+import {isCacheDisabled, isCacheReadOnly, isCacheWriteOnly} from './cache-utils'
+import {logCachingReport, CacheListener} from './cache-reporting'
+import {GradleStateCache} from './cache-base'
 
-const BUILD_ROOT_DIR = 'BUILD_ROOT_DIR'
+const CACHE_RESTORED_VAR = 'GRADLE_BUILD_ACTION_CACHE_RESTORED'
+const GRADLE_USER_HOME = 'GRADLE_USER_HOME'
 const CACHE_LISTENER = 'CACHE_LISTENER'
 
-export async function restore(buildRootDirectory: string): Promise<void> {
+export async function restore(gradleUserHome: string): Promise<void> {
+    // Bypass restore cache on all but first action step in workflow.
+    if (process.env[CACHE_RESTORED_VAR]) {
+        core.info('Cache only restored on first action step.')
+        return
+    }
+    core.exportVariable(CACHE_RESTORED_VAR, true)
+
+    const gradleStateCache = new GradleStateCache(gradleUserHome)
+
     if (isCacheDisabled()) {
         core.info('Cache is disabled: will not restore state from previous builds.')
+        // Initialize the Gradle User Home even when caching is disabled.
+        gradleStateCache.init()
+        return
+    }
+
+    if (gradleStateCache.cacheOutputExists()) {
+        core.info('Gradle User Home already exists: will not restore from cache.')
+        // Initialize pre-existing Gradle User Home.
+        gradleStateCache.init()
+        return
+    }
+
+    gradleStateCache.init()
+    // Mark the state as restored so that post-action will perform save.
+    core.saveState(CACHE_RESTORED_VAR, true)
+    // Save the Gradle User Home for the post-action step.
+    core.saveState(GRADLE_USER_HOME, gradleUserHome)
+
+    if (isCacheWriteOnly()) {
+        core.info('Cache is write-only: will not restore from cache.')
         return
     }
 
     await core.group('Restore Gradle state from cache', async () => {
-        core.saveState(BUILD_ROOT_DIR, buildRootDirectory)
-
         const cacheListener = new CacheListener()
-        await new GradleUserHomeCache(buildRootDirectory).restore(cacheListener)
-
-        const projectDotGradleCache = new ProjectDotGradleCache(buildRootDirectory)
-        if (cacheListener.fullyRestored) {
-            // Only restore the configuration-cache if the Gradle Home is fully restored
-            await projectDotGradleCache.restore(cacheListener)
-        } else {
-            // Otherwise, prepare the cache key for later save()
-            core.info('Gradle Home cache not fully restored: not restoring configuration-cache state')
-            projectDotGradleCache.prepareCacheKey()
-        }
+        await gradleStateCache.restore(cacheListener)
 
         core.saveState(CACHE_LISTENER, cacheListener.stringify())
     })
 }
 
 export async function save(): Promise<void> {
+    if (!shouldSaveCaches()) {
+        return
+    }
+
     const cacheListener: CacheListener = CacheListener.rehydrate(core.getState(CACHE_LISTENER))
 
     if (isCacheReadOnly()) {
@@ -43,52 +64,23 @@ export async function save(): Promise<void> {
     }
 
     await core.group('Caching Gradle state', async () => {
-        const buildRootDirectory = core.getState(BUILD_ROOT_DIR)
-        return Promise.all([
-            new GradleUserHomeCache(buildRootDirectory).save(cacheListener),
-            new ProjectDotGradleCache(buildRootDirectory).save(cacheListener)
-        ])
+        const gradleUserHome = core.getState(GRADLE_USER_HOME)
+        return new GradleStateCache(gradleUserHome).save(cacheListener)
     })
 
     logCachingReport(cacheListener)
 }
 
-function logCachingReport(listener: CacheListener): void {
-    core.info(`---------- Caching Summary -------------
-Restored Entries Count: ${getCount(listener.cacheEntries, e => e.restoredSize)}
-                  Size: ${getSum(listener.cacheEntries, e => e.restoredSize)}
-Saved Entries    Count: ${getCount(listener.cacheEntries, e => e.savedSize)}
-                  Size: ${getSum(listener.cacheEntries, e => e.savedSize)}`)
-
-    core.startGroup('Cache Entry details')
-    for (const entry of listener.cacheEntries) {
-        core.info(`Entry: ${entry.entryName}
-    Requested Key : ${entry.requestedKey ?? ''}
-    Restored  Key : ${entry.restoredKey ?? ''}
-              Size: ${formatSize(entry.restoredSize)}
-    Saved     Key : ${entry.savedKey ?? ''}
-              Size: ${formatSize(entry.savedSize)}`)
+function shouldSaveCaches(): boolean {
+    if (isCacheDisabled()) {
+        core.info('Cache is disabled: will not save state for later builds.')
+        return false
     }
-    core.endGroup()
-}
 
-function getCount(
-    cacheEntries: CacheEntryListener[],
-    predicate: (value: CacheEntryListener) => number | undefined
-): number {
-    return cacheEntries.filter(e => predicate(e) !== undefined).length
-}
-
-function getSum(
-    cacheEntries: CacheEntryListener[],
-    predicate: (value: CacheEntryListener) => number | undefined
-): string {
-    return formatSize(cacheEntries.map(e => predicate(e) ?? 0).reduce((p, v) => p + v, 0))
-}
-
-function formatSize(bytes: number | undefined): string {
-    if (bytes === undefined || bytes === 0) {
-        return ''
+    if (!core.getState(CACHE_RESTORED_VAR)) {
+        core.info('Cache will not be saved: not restored in main action step.')
+        return false
     }
-    return `${Math.round(bytes / (1024 * 1024))} MB (${bytes} B)`
+
+    return true
 }

src/execution.ts

@@ -1,24 +1,21 @@
+import * as core from '@actions/core'
 import * as exec from '@actions/exec'
 import fs from 'fs'
 import path from 'path'
-import {writeInitScript} from './build-scan-capture'
+import * as gradlew from './gradlew'
 
-export async function execute(executable: string, root: string, args: string[]): Promise<BuildResult> {
+export async function executeGradleBuild(executable: string | undefined, root: string, args: string[]): Promise<void> {
     let buildScanUrl: string | undefined
 
-    // TODO: instead of running with no-daemon, run `--stop` in post action.
-    args.push('--no-daemon')
-
-    const initScript = writeInitScript()
-    args.push('--init-script')
-    args.push(initScript)
-
     const buildScanFile = path.resolve(root, 'gradle-build-scan.txt')
     if (fs.existsSync(buildScanFile)) {
         fs.unlinkSync(buildScanFile)
     }
 
-    const status: number = await exec.exec(executable, args, {
+    // Use the provided executable, or look for a Gradle wrapper script to run
+    const toExecute = executable ?? gradlew.locateGradleWrapperScript(root)
+    verifyIsExecutableScript(toExecute)
+    const status: number = await exec.exec(toExecute, args, {
         cwd: root,
         ignoreReturnCode: true
     })
@@ -27,14 +24,19 @@ export async function execute(executable: string, root: string, args: string[]):
         buildScanUrl = fs.readFileSync(buildScanFile, 'utf-8')
     }
 
-    return new BuildResultImpl(status, buildScanUrl)
+    if (status !== 0) {
+        if (buildScanUrl) {
+            core.setFailed(`Gradle build failed: ${buildScanUrl}`)
+        } else {
+            core.setFailed(`Gradle build failed: process exited with status ${status}`)
+        }
+    }
 }
 
-export interface BuildResult {
-    readonly status: number
-    readonly buildScanUrl?: string
-}
-
-class BuildResultImpl implements BuildResult {
-    constructor(readonly status: number, readonly buildScanUrl?: string) {}
+function verifyIsExecutableScript(toExecute: string): void {
+    try {
+        fs.accessSync(toExecute, fs.constants.X_OK)
+    } catch (err) {
+        throw new Error(`Gradle script '${toExecute}' is not executable.`)
+    }
 }

src/main.ts

@@ -1,42 +1,33 @@
 import * as core from '@actions/core'
 import * as path from 'path'
+import * as os from 'os'
 import {parseArgsStringToArgv} from 'string-argv'
 
 import * as caches from './caches'
 import * as execution from './execution'
-import * as gradlew from './gradlew'
 import * as provision from './provision'
 
-// Invoked by GitHub Actions
+/**
+ * The main entry point for the action, called by Github Actions for the step.
+ */
 export async function run(): Promise<void> {
     try {
         const workspaceDirectory = process.env[`GITHUB_WORKSPACE`] || ''
         const buildRootDirectory = resolveBuildRootDirectory(workspaceDirectory)
+        const gradleUserHome = determineGradleUserHome(buildRootDirectory)
 
-        await caches.restore(buildRootDirectory)
+        await caches.restore(gradleUserHome)
 
-        const args: string[] = parseCommandLineArguments()
-
-        const result = await execution.execute(
-            await resolveGradleExecutable(workspaceDirectory, buildRootDirectory),
-            buildRootDirectory,
-            args
-        )
-
-        if (result.buildScanUrl) {
-            core.setOutput('build-scan-url', result.buildScanUrl)
+        const executable = await provisionGradle(workspaceDirectory)
+        // executable will be undefined if using Gradle wrapper
+        if (executable !== undefined) {
+            core.addPath(path.dirname(executable))
         }
 
-        if (result.status !== 0) {
-            if (result.buildScanUrl) {
-                core.setFailed(`Gradle build failed: ${result.buildScanUrl}`)
-            } else {
-                core.setFailed(`Gradle build failed: process exited with status ${result.status}`)
-            }
-        } else {
-            if (result.buildScanUrl) {
-                core.notice(`Gradle build succeeded: ${result.buildScanUrl}`)
-            }
+        // Only execute if arguments have been provided
+        const args: string[] = parseCommandLineArguments()
+        if (args.length > 0) {
+            await execution.executeGradleBuild(executable, buildRootDirectory, args)
         }
     } catch (error) {
         core.setFailed(String(error))
@@ -48,7 +39,7 @@ export async function run(): Promise<void> {
 
 run()
 
-async function resolveGradleExecutable(workspaceDirectory: string, buildRootDirectory: string): Promise<string> {
+async function provisionGradle(workspaceDirectory: string): Promise<string | undefined> {
     const gradleVersion = core.getInput('gradle-version')
     if (gradleVersion !== '' && gradleVersion !== 'wrapper') {
         return path.resolve(await provision.gradleVersion(gradleVersion))
@@ -59,7 +50,7 @@ async function resolveGradleExecutable(workspaceDirectory: string, buildRootDire
         return path.resolve(workspaceDirectory, gradleExecutable)
     }
 
-    return gradlew.locateGradleWrapperScript(buildRootDirectory)
+    return undefined
 }
 
 function resolveBuildRootDirectory(baseDirectory: string): string {
@@ -69,6 +60,15 @@ function resolveBuildRootDirectory(baseDirectory: string): string {
     return resolvedBuildRootDirectory
 }
 
+function determineGradleUserHome(rootDir: string): string {
+    const customGradleUserHome = process.env['GRADLE_USER_HOME']
+    if (customGradleUserHome) {
+        return path.resolve(rootDir, customGradleUserHome)
+    }
+
+    return path.resolve(os.homedir(), '.gradle')
+}
+
 function parseCommandLineArguments(): string[] {
     const input = core.getInput('arguments')
     return parseArgsStringToArgv(input)

src/post.ts

@@ -1,15 +1,26 @@
 import * as core from '@actions/core'
 import * as caches from './caches'
 
-// Invoked by GitHub Actions
+// Catch and log any unhandled exceptions.  These exceptions can leak out of the uploadChunk method in
+// @actions/toolkit when a failed upload closes the file descriptor causing any in-process reads to
+// throw an uncaught exception.  Instead of failing this action, just warn.
+process.on('uncaughtException', e => handleFailure(e))
+
+/**
+ * The post-execution entry point for the action, called by Github Actions after completing all steps for the Job.
+ */
 export async function run(): Promise<void> {
     try {
         await caches.save()
     } catch (error) {
-        core.setFailed(String(error))
-        if (error instanceof Error && error.stack) {
-            core.info(error.stack)
-        }
+        handleFailure(error)
+    }
+}
+
+function handleFailure(error: unknown): void {
+    core.warning(`Unhandled error saving cache - job will continue: ${error}`)
+    if (error instanceof Error && error.stack) {
+        core.info(error.stack)
     }
 }