name: TZDB check

on:
  schedule:
    - cron:  '0 3 * * 1,3,5'

jobs:
  tzdbcheck:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        token: ${{ secrets.GITHUB_PERSONAL_TOKEN }}
    - name: Maven cache
      uses: actions/cache@v1
      with:
        path: ~/.m2/repository
        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}-${{ hashFiles('.github/workflows/tzdbupdate.yml') }}
        restore-keys: |
          ${{ runner.os }}-maven-

    - name: Set up JDK 1.8
      uses: actions/setup-java@v1
      with:
        java-version: 1.8
    - name: Maven version
      run: |
        mkdir -p ./.mvn
        echo '-e -B -DtrimStackTrace=false' > ./.mvn/maven.config
        mvn --version
        mkdir -p target

    - name: Get current version
      run: |
        CURRENT_TZDB=$(mvn help:evaluate -Dexpression=tz.database.version -q -DforceStdout)
        echo "current: $CURRENT_TZDB"
        echo "CURRENT_TZDB=$CURRENT_TZDB" >> $GITHUB_ENV
    - name: Get latest version
      working-directory: target
      run: |
        git clone https://github.com/eggert/tz.git
        cd tz
        LATEST_TZDB=$(git describe --abbrev=0 --tags)
        echo "latest: $LATEST_TZDB"
        echo "LATEST_TZDB=$LATEST_TZDB" >> $GITHUB_ENV
    - name: Compare versions
      run: |
        echo "current: $CURRENT_TZDB"
        echo "latest:  $LATEST_TZDB"
        if [ "$CURRENT_TZDB" == "$LATEST_TZDB" ]; then echo "NOOP=true" >> $GITHUB_ENV; fi

    - name: Checkout tzdb release
      if: env.NOOP != 'true'
      working-directory: target/tz
      run: |
        git checkout master
        git reset --hard ${LATEST_TZDB} --
        git status
    - name: Copy files
      if: env.NOOP != 'true'
      run: |
        ls -l target/tz
        \cp target/tz/africa src/main/java/org/joda/time/tz/src
        \cp target/tz/antarctica src/main/java/org/joda/time/tz/src
        \cp target/tz/asia src/main/java/org/joda/time/tz/src
        \cp target/tz/australasia src/main/java/org/joda/time/tz/src
        \cp target/tz/backward src/main/java/org/joda/time/tz/src
        \cp target/tz/etcetera src/main/java/org/joda/time/tz/src
        \cp target/tz/europe src/main/java/org/joda/time/tz/src
        \cp target/tz/northamerica src/main/java/org/joda/time/tz/src
        \cp target/tz/southamerica src/main/java/org/joda/time/tz/src
        ls -l src/main/java/org/joda/time/tz/src
    - name: Update build with new tzdb
      if: env.NOOP != 'true'
      run: |
        sed -i 's/$CURRENT_TZDB/${LATEST_TZDB}/g' src/main/java/org/joda/time/tz/src/Readme.txt
        mvn versions:set-property -DnewVersion=${LATEST_TZDB} -Dproperty=tz.database.version -DgenerateBackupPoms=false
        mvn install

    - name: Create Pull Request
      if: env.NOOP != 'true'
      id: createpr
      uses: peter-evans/create-pull-request@v2
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_PERSONAL_TOKEN }}
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
        commit-message: 'Update TZDB to ${{ env.LATEST_TZDB }}'
        committer: Stephen Colebourne (CI) <scolebourne@joda.org>
        author: Stephen Colebourne (CI) <scolebourne@joda.org>
        title: 'Update TZDB to ${{ env.LATEST_TZDB }}'
        body: 'Updates TZDB data to ${{ env.LATEST_TZDB }}'
        assignees: jodastephen
        labels: TZDB
        branch: bot/update-tzdb
