# to boostrap this action, create an empty repo with just this file and svn-authors
# run the action once with force parameter set to "yes"

# git commit -m "xxx" * && git push -f && gh workflow run -R kichik/nsis-travis copy-svn.yml -f force=yes

name: Copy from SourceForge Subversion
on: 
  workflow_dispatch:
    inputs:
      force:
        description: 'Force push (CAREFUL!)'     
        required: false
  schedule:
    - cron:  '4 10 * * *'

jobs:
  copy:
    runs-on: ubuntu-18.04
    steps:
      - uses: actions/checkout@v2

      - name: Install git-svn
        run: sudo add-apt-repository ppa:git-core/ppa && sudo apt update && sudo apt install git-svn

      - name: Configure git
        run: |
          git config --global user.email "kichik@gmail.com"
          git config --global user.name "Amir Szekely"

      - name: Restore cache
        id: restore-cache
        run: |
          if git fetch origin svn2git-cache; then
            git checkout svn2git-cache
          else
            git checkout --orphan svn2git-cache
            git rm -rf --cached .
            git add .github/workflows/*
            git commit -m "Empty cache"
            echo '::set-output name=cache-hit::false'
          fi
          
          if [ -f svn2git-cache.tar.gz ]; then
            tar xzf svn2git-cache.tar.gz
            echo '::set-output name=cache-hit::true'
          else
            echo '::set-output name=cache-hit::false'
          fi

      - name: Initial SVN clone
        if: steps.restore-cache.outputs.cache-hit != 'true'
        run: |
          git svn clone -A.github/workflows/svn-authors -s https://svn.code.sf.net/p/nsis/code/NSIS svn2git

      - name: SVN fetch
        working-directory: svn2git
        run: |
          git svn fetch --fetch-all
          git svn rebase

      - name: SVN branches
        working-directory: svn2git
        run: |
          for remote_branch in $(git branch -r | grep -v /tags/); do
            if echo $remote_branch | grep @; then
              echo ignoring weird branch $remote_branch
              continue
            fi
            
            local_branch=`echo $remote_branch | cut -d / -f 2-`
            git checkout -b "$local_branch" "$remote_branch" || git checkout "$local_branch"
            git svn rebase
          done
          git checkout master

      - name: SVN tags
        working-directory: svn2git
        run: |
          git for-each-ref --format="%(refname:short) %(objectname)" refs/remotes/origin/tags \
          | while read BRANCH REF
            do
                  TAG_NAME=`echo $BRANCH | cut -d / -f 3-`
                  BODY="$(git log -1 --format=format:%B $REF)"
                  echo "ref=$REF parent=$(git rev-parse $REF^) tagname=$TAG_NAME body=$BODY" >&2
                  if [ $(git tag -l "$TAG_NAME") ]; then
                    echo tag already exists
                  else
                    git tag -a -m "$BODY" $TAG_NAME $REF^
                  fi
            done

      - name: Setup GitHub access
        env:
          SSH_KEY: ${{ secrets.SSH_KEY }}
        run: |
          mkdir -p ~/.ssh
          touch ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          echo "$SSH_KEY" >> ~/.ssh/id_ed25519

      - name: Push to GitHub
        working-directory: svn2git
        run: |
          flags=""
          if [[ "${{ github.event.inputs.force }}" = "yes" ]]; then
            flags="--force"
          fi
          remote_repo="git@github.com:${GITHUB_REPOSITORY}.git"
          git push "$remote_repo" --all $flags
          git push "$remote_repo" --tags $flags

      - name: GC
        working-directory: svn2git
        run: |
          echo run garbage collection so caching does not fail while files are changing
          git gc --auto

      - name: Save cache
        run: |
          rm -f svn2git-cache.tar.gz
          tar czf svn2git-cache.tar.gz svn2git
          git add svn2git-cache.tar.gz
          cp svn2git/.github/workflows/* .github/workflows/
          git add .github/workflows/*
          git commit --amend -m "update cache" svn2git-cache.tar.gz
          git push --force git@github.com:${GITHUB_REPOSITORY}.git svn2git-cache