# Workflow to cherry-pick changes from main to release branch.

name: auto-merge

on:
  push:
    branches: [ main ]

jobs:
  build-and-test:
    strategy:
      fail-fast: false
      matrix:
        os: [ ubuntu-latest, macos-latest ]

    # The type of runner that the job will run on
    runs-on: ${{ matrix.os }}

    steps:
    # Checkout
    - uses: actions/checkout@v2
      with:
        fetch-depth: 0
        ref: 1.0.9-release

    - name: merge commits from main to release branch
      run: |
        # Cherry pick new changes from main, except for version bumps.
        # A commit is a version bump IFF it touches third_party/prebuilt/repo
        DONT_PICK=$(cat <<EOF
        76ac8de5cd4769b2cfd7c80ad156309c5f27d52a
        9675c5de0f689cb8563a0b6e1142a78747e8675c
        fc22e8f947fb533e3f728252882c9dbe3f4d810d
        caa3e0843dd169dcc3486d1ac28d16489324d564
        1ed2d3b709adc53450eb1c09fffe33a50459cc88
        f0647fd2acffa78454700eb4750bf77caab05076
        EOF
        )
        git config --global user.email "kotlin-symbol-processing@google.com"
        git config --global user.name "KSP Auto Pick"
        MERGE_BASE=$(git merge-base HEAD origin/main)
        CANDIDATES=$(git log --pretty=%H $MERGE_BASE..origin/main)
        PICKED=$(git log $MERGE_BASE..HEAD | sed -n "s/^[ ]*(cherry picked from commit \([a-z0-9]*\))$/\1/p")
        VERSION_BUMPS=$(git log $MERGE_BASE..origin/main --pretty=%H --grep UPDATE_KOTLIN_VERSION)
        AA_COMMITS=$(git log $MERGE_BASE..origin/main --pretty=%H kotlin-analysis-api)
        TO_PICK=$(grep -Fxv -f <(echo "$PICKED"; echo "$VERSION_BUMPS"; echo "$DONT_PICK"; echo "$AA_COMMITS") <(echo "$CANDIDATES") | awk '{a[i++]=$0} END {for (j=i-1; j>=0;) print a[j--] }')
        echo Picking $TO_PICK
        if [ -n "$TO_PICK" ]; then git cherry-pick -x $TO_PICK; fi

    - name: Setup Java 9
      uses: actions/setup-java@v1.4.3
      with:
        java-version: '9'
        java-package: jdk
        architecture: x64
    - name: set JDK_9 environment variable for kotlin compiler
      env:
        ACTIONS_ALLOW_UNSECURE_COMMANDS: true
      run: echo ::set-env name=JDK_9::$(echo $JAVA_HOME)
    - name: Setup Java 11
      uses: actions/setup-java@v1.4.3
      with:
        java-version: '11'
        java-package: jdk
        architecture: x64

    # Build cache
    - name: Cache Gradle Cache
      uses: actions/cache@v2
      with:
        path: ~/.gradle/caches
        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}-${{ hashFiles('**/gradle.properties') }}
        # An ordered list of keys to use for restoring the cache if no cache hit occurred for key
        restore-keys: |
          ${{ runner.os }}-gradle-
    - name: Cache gradle wrapper
      uses: actions/cache@v2
      with:
        path: ~/.gradle/wrapper
        key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}

    # Check API compatibility
    - name: API compatibility check
      run: ./gradlew :api:checkApi

    # Run ksp generated tests
    - name: test
      run: ./gradlew --stacktrace --info test

    - name: Upload test results
      if: always()
      uses: actions/upload-artifact@v3
      with:
        name: test-reports
        path: |
          compiler-plugin/build/reports
          integration-tests/build/reports
          gradle-plugin/build/reports
          common-util/build/reports

  pick-and-push:
    needs: build-and-test
    runs-on: ubuntu-latest

    steps:
      # Checkout
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
          ref: 1.0.9-release

      - name: merge commits from main to release branch
        run: |
          # Cherry pick new changes from main, except for version bumps.
          # A commit is a version bump IFF it touches third_party/prebuilt/repo
          DONT_PICK=$(cat <<EOF
          76ac8de5cd4769b2cfd7c80ad156309c5f27d52a
          9675c5de0f689cb8563a0b6e1142a78747e8675c
          fc22e8f947fb533e3f728252882c9dbe3f4d810d
          caa3e0843dd169dcc3486d1ac28d16489324d564
          1ed2d3b709adc53450eb1c09fffe33a50459cc88
          f0647fd2acffa78454700eb4750bf77caab05076
          EOF
          )
          git config --global user.email "kotlin-symbol-processing@google.com"
          git config --global user.name "KSP Auto Pick"
          MERGE_BASE=$(git merge-base HEAD origin/main)
          CANDIDATES=$(git log --pretty=%H $MERGE_BASE..origin/main)
          PICKED=$(git log $MERGE_BASE..HEAD | sed -n "s/^[ ]*(cherry picked from commit \([a-z0-9]*\))$/\1/p")
          VERSION_BUMPS=$(git log $MERGE_BASE..origin/main --pretty=%H --grep UPDATE_KOTLIN_VERSION)
          AA_COMMITS=$(git log $MERGE_BASE..origin/main --pretty=%H kotlin-analysis-api)
          TO_PICK=$(grep -Fxv -f <(echo "$PICKED"; echo "$VERSION_BUMPS"; echo "$DONT_PICK"; echo "$AA_COMMITS") <(echo "$CANDIDATES") | tac)
          echo Picking $TO_PICK
          if [ -n "$TO_PICK" ]; then git cherry-pick -x $TO_PICK; fi

      - name: push to release branch
        run: git push origin