name: Update cache from SVN

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

  #schedule:
  #- cron: '59 */3 * * *' # every third 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

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

      - name: checkout authors
        uses: actions/checkout@v3.5.2
        with:
          ref: travis
          path: ./authors

      - name: Get current date 
        id: get-date
        run: |
          echo "::set-output name=timestamp::$(/bin/date -u "+%Y%m%d%H" )"
        shell: bash

      - name: Cache runners svn-2-git-fhem mirror directory  
        # Some room for improvement because we create a new cache on every run where a new ref is fetched, this isn't very nice, normaly we need only the last one and it takes 7 days until they are deleted
        id: cache-fhem
        uses: actions/cache@v3.3.1
        with:
          path: |
            ./src/fhem-mirror/.git
          key: ${{ runner.os }}-fhemsvndir-${{ steps.get-date.outputs.timestamp }}
          restore-keys: |
            ${{ runner.os }}-fhemsvndir-

      #- name: remove gitconfig
      #  run: |
      #    rm ./src/fhem-mirror/.git/config 
          
      - name: checkout main branch
        uses: actions/checkout@v3.5.2
        with:
          path: ./src/fhem-mirror
          clean: false

      - 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/authors_svn.txt;
          cat ${GITHUB_WORKSPACE}/authors/authors.txt ${GITHUB_WORKSPACE}/authors/authors_svn.txt | sort -u -k1,1 > ${GITHUB_WORKSPACE}/authors/authors_merged.txt;
          ls -la ${GITHUB_WORKSPACE}/authors/authors_merged.txt;

      - name: fetch from svn
        id: fetchsvn
        timeout-minutes: 120
        working-directory: ./src/fhem-mirror
        run: |
          echo "::group::git svn init"
          git svn init --trunk=trunk --tags=tags --prefix=svn/ https://svn.fhem.de/fhem;
          git config --replace-all svn.authorsfile "${GITHUB_WORKSPACE}/authors/authors_merged.txt"
          git config --replace-all svn-remote.svn.preserve-empty-dirs "true" ;
          git config --replace-all svn-remote.svn.placeholder-filename ".gitkeep" ;
          echo "Current .git/config file content:";
          cat ${GITHUB_WORKSPACE}/src/fhem-mirror/.git/config;
          echo "::endgroup::"
          
          echo "::set-output name=SVN_FETCH_STATUS::incomplete"
          # Run fetches after init, go pick up some base refs for the cache on first run only!
          RET=124
          c=1
          while [ $RET -eq 124 ]; do
            echo "::group::Fetch ${c}/5"
            timeout 1200 git svn --log-window-size=200 -q fetch && RET=$? || true
            if [ "$RET" -ne 0 ] && [ "$RET" -ne 124 ]; then
              echo "::set-output name=SVN_FETCH_STATUS::error"
            fi 
            ((c++)) && ((c==6)) && break
            echo "::endgroup::"
          done
          if [ "$RET" -eq 0 ]; then          
            echo "::set-output name=SVN_FETCH_STATUS::complete"
          fi

     # - name: Copy Workflow Files to target
     #   if: ${{ steps.fetchsvn.outputs.SVN_FETCH_STATUS == 'complete' }}
     # run: |
     #   cp -R ${GITHUB_WORKSPACE}/main/.github ./src/fhem-mirror

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