name: Mirror from SVN

on:
  push:

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

  schedule:
  - cron: '21 * * * *' # every hour to keep cache up to date

jobs:
  # This workflow contains a single job called "build"
  mirror:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest
    continue-on-error: true

    env:
      TRAVIS_REPO_SLUG: ${{ github.repository }} 
    steps:

      - name: install git-svn package
        run: |
          sudo apt-get update
          sudo apt-get install git-svn --no-install-recommends

      - name: checkout mirror config branch
        uses: actions/checkout@master

      - name: Get current date as seconds
        id: get-date
        run: |
          echo "::set-output name=seconds::$(/bin/date -u "+%s")"
        shell: bash

      # - name: Get latest svn revision from remote server
      #   id: svnRemote
      #   run: echo "::set-output name=LAST_SVN_REVISION::$( svn info --show-item revision https://svn.fhem.de/fhem/trunk )"

      - name: generate merged authors file
        run: |
          cd /tmp
          svn log https://svn.fhem.de/fhem --xml --quiet | grep author | sort -u | perl -pe 's/.*>(.*?)<.*/$1 = $1 <>/' > ${GITHUB_WORKSPACE}/authors_svn.txt;
          cat ${GITHUB_WORKSPACE}/authors.txt ${GITHUB_WORKSPACE}/authors_svn.txt | sort -u -k1,1 > ${GITHUB_WORKSPACE}/authors_merged.txt;
          ls -la ${GITHUB_WORKSPACE}/authors_merged.txt;

      - name: Cache runners svn-2-git-fhem mirror directory  
        id: cache-fhem
        uses: actions/cache@v2
        with:
          path: ./src/fhem-mirror
          key: ${{ runner.os }}-fhemsvnmirror-${{ steps.get-date.outputs.seconds }}
          restore-keys: |
            ${{ runner.os }}-fhemsvnmirror-


      - name: init mirror repository if it is not already a mirror
        run: |
          if [[ ! -d "${GITHUB_WORKSPACE}/src/fhem-mirror/.git" ]]; then
            git init "${GITHUB_WORKSPACE}/src/fhem-mirror" ;
            cd "${GITHUB_WORKSPACE}/src/fhem-mirror";
            git svn init --trunk=trunk --prefix=svn/ --no-metadata https://svn.fhem.de/fhem ;
            git config --add svn-remote.svn.preserve-empty-dirs "true" ;
            git config --add svn-remote.svn.placeholder-filename ".gitkeep" ;
            git config --add svn.authorsfile "${GITHUB_WORKSPACE}/authors_merged.txt" ;
          else
            echo "Current .git/config file content:";
            cat ${GITHUB_WORKSPACE}/src/fhem-mirror/.git/config;
          fi


      # - name: Update or checkout fhem from svn
      #   if: steps.cache-fhem.outputs.cache-hit != 'true'
      #   run: svn update ./src/fhem/trunk/  || svn co https://svn.fhem.de/fhem/trunk ./src/fhem/trunk;

      # - name: get svn vars
      #   id: svnVars
      #   run: |
      #     echo "::set-output name=FHEM_REVISION_LATEST::$( cd ./src/fhem/trunk; svn info --show-item last-changed-revision)"
      #     echo "::set-output name=FHEM_VERSION::$( cd ./src/fhem/trunk; svn ls "^/tags" https://svn.fhem.de/fhem/ | grep "FHEM_" | sort | tail -n 1 | cut -d / -f 1 | cut -d " " -f 1 |cut -d _ -f 2- | sed s/_/./g )"

      - name: fetch svn to git master branch
        id: fetchsvn
        timeout-minutes: 1800
        run: |
          echo "::set-output name=SVN_FETCH_STATUS::incomplete"
          cd "${GITHUB_WORKSPACE}/src/fhem-mirror";
          RET=0
          timeout 630 git svn -q fetch || RET=$?;
          if [[ $RET == 0 ]]; then
            git checkout -f "master"
            git rebase "remotes/svn/trunk"
            echo "::set-output name=SVN_FETCH_STATUS::complete"
          elif [[ $RET != 124 ]]; then
            echo "::set-output name=SVN_FETCH_STATUS::error"
          fi

      - name: Verify no fetch error state
        if: ${{ steps.fetchsvn.outputs.SVN_FETCH_STATUS == 'error' }}
        run: |
          echo "A permanent error occured"
          exit 1

      # - name: Commit fetched files
      #   run: |
      #     cd "${GITHUB_WORKSPACE}/src/fhem-mirror";
      #     echo "Will now prepare push following directory structure to remote repo:";
      #     ls -la ;
      #     git config --add remote.origin.push 'refs/remotes/svn/trunk:refs/heads/master';

      - name: Push force changes to master branch in same repo
        if: ${{ steps.fetchsvn.outputs.SVN_FETCH_STATUS == 'complete' }}
        uses: ad-m/github-push-action@master
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          branch: master
          directory: ./src/fhem-mirror
          force: true