ci.yml

name: CI

on:
  push:
    branches: [main]
    tags: ["v*"]
  pull_request:

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Activate Hermit
        run: echo "${GITHUB_WORKSPACE}/bin" >> "$GITHUB_PATH"

      - uses: actions/cache@v4
        with:
          path: |
            ~/go/pkg/mod
            ~/.cache/go-build
          key: go-${{ hashFiles('go.sum') }}
          restore-keys: go-

      - uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 21

      - name: Unit tests
        run: go test -v -short -timeout 300s ./...

      - name: Integration tests
        run: go test -v -run ^TestIntegration -timeout 600s ./cmd/gradle-cache/

  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Activate Hermit
        run: echo "${GITHUB_WORKSPACE}/bin" >> "$GITHUB_PATH"

      - uses: actions/cache@v4
        with:
          path: |
            ~/go/pkg/mod
            ~/.cache/go-build
          key: go-${{ hashFiles('go.sum') }}
          restore-keys: go-

      - name: Lint
        run: golangci-lint run

  # Job 1: Cache miss → build Gradle → save full bundle.
  save-full:
    runs-on: ubuntu-latest
    permissions:
      actions: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Activate Hermit
        run: echo "${GITHUB_WORKSPACE}/bin" >> "$GITHUB_PATH"

      - uses: actions/cache@v4
        with:
          path: |
            ~/go/pkg/mod
            ~/.cache/go-build
          key: go-${{ hashFiles('go.sum') }}
          restore-keys: go-

      - uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 25

      - name: Build gradle-cache from source
        run: |
          go build -o gradle-cache ./cmd/gradle-cache
          echo "$PWD" >> "$GITHUB_PATH"

      - name: Prepare test project
        run: |
          cp -r cmd/gradle-cache/testdata/gradle-project "$RUNNER_TEMP/project"
          chmod +x "$RUNNER_TEMP/project/gradlew"

      - uses: ./
        with:
          cache-key: integration-test
          project-dir: ${{ runner.temp }}/project
          gradle-user-home: ${{ runner.temp }}/gradle-home
          ref: HEAD
          log-level: debug

      - name: Run Gradle build
        run: go test -v -run ^TestIntegrationGradleBuild$ -timeout 300s ./cmd/gradle-cache/
        env:
          INTEGRATION_PROJECT_DIR: ${{ runner.temp }}/project
          GRADLE_USER_HOME: ${{ runner.temp }}/gradle-home

      # Post step saves a full bundle automatically.

  # Job 2: Restore full bundle (hit) → verify cache hits → save delta.
  verify-full-and-save-delta:
    needs: save-full
    runs-on: ubuntu-latest
    permissions:
      actions: write
    env:
      GITHUB_TOKEN: ${{ github.token }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Activate Hermit
        run: echo "${GITHUB_WORKSPACE}/bin" >> "$GITHUB_PATH"

      - uses: actions/cache@v4
        with:
          path: |
            ~/go/pkg/mod
            ~/.cache/go-build
          key: go-${{ hashFiles('go.sum') }}
          restore-keys: go-

      - uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 25

      - name: Build gradle-cache from source
        run: |
          go build -o gradle-cache ./cmd/gradle-cache
          echo "$PWD" >> "$GITHUB_PATH"

      - name: Prepare test project
        run: |
          cp -r cmd/gradle-cache/testdata/gradle-project "$RUNNER_TEMP/project"
          chmod +x "$RUNNER_TEMP/project/gradlew"

      # Restore the full bundle, then verify it.
      - uses: ./
        with:
          cache-key: integration-test
          project-dir: ${{ runner.temp }}/project
          gradle-user-home: ${{ runner.temp }}/gradle-home
          branch: integration-delta-test
          ref: HEAD
          log-level: debug

      - name: Verify full restore
        run: go test -v -run ^TestIntegrationVerifyRestore$ -timeout 300s ./cmd/gradle-cache/
        env:
          INTEGRATION_PROJECT_DIR: ${{ runner.temp }}/project
          GRADLE_USER_HOME: ${{ runner.temp }}/gradle-home

      # Modify build.gradle to invalidate the configuration cache, then
      # rebuild so the delta captures the regenerated config cache entry.
      - name: Modify build.gradle and rebuild
        run: |
          echo '// delta change' >> "$RUNNER_TEMP/project/build.gradle"
          cd "$RUNNER_TEMP/project"
          GRADLE_USER_HOME="${{ runner.temp }}/gradle-home" ./gradlew build

      # Post step saves a delta bundle for branch "integration-delta-test".

  # Job 3: Restore full bundle + delta → verify cache hits.
  verify-delta:
    needs: verify-full-and-save-delta
    runs-on: ubuntu-latest
    permissions:
      actions: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Activate Hermit
        run: echo "${GITHUB_WORKSPACE}/bin" >> "$GITHUB_PATH"

      - uses: actions/cache@v4
        with:
          path: |
            ~/go/pkg/mod
            ~/.cache/go-build
          key: go-${{ hashFiles('go.sum') }}
          restore-keys: go-

      - uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 25

      - name: Build gradle-cache from source
        run: |
          go build -o gradle-cache ./cmd/gradle-cache
          echo "$PWD" >> "$GITHUB_PATH"

      - name: Prepare test project
        run: |
          cp -r cmd/gradle-cache/testdata/gradle-project "$RUNNER_TEMP/project"
          chmod +x "$RUNNER_TEMP/project/gradlew"

      # Restore full + delta bundle concurrently.
      - uses: ./
        with:
          cache-key: integration-test
          project-dir: ${{ runner.temp }}/project
          gradle-user-home: ${{ runner.temp }}/gradle-home
          branch: integration-delta-test
          save: "false"
          ref: HEAD
          log-level: debug

      - name: Verify delta restore
        run: go test -v -run ^TestIntegrationVerifyRestore$ -timeout 300s ./cmd/gradle-cache/
        env:
          INTEGRATION_PROJECT_DIR: ${{ runner.temp }}/project
          GRADLE_USER_HOME: ${{ runner.temp }}/gradle-home

  release:
    if: startsWith(github.ref, 'refs/tags/v')
    needs: [test, lint, verify-delta]
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Activate Hermit
        run: echo "${GITHUB_WORKSPACE}/bin" >> "$GITHUB_PATH"

      - uses: actions/cache@v4
        with:
          path: |
            ~/go/pkg/mod
            ~/.cache/go-build
          key: go-${{ hashFiles('go.sum') }}
          restore-keys: go-

      - name: Release
        run: goreleaser release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}