name: CI
on:
  push:
    branches:
      - master
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: push content
      run: |
        REMOTE="https://${GITHUB_PAT}@github.com/${GITHUB_REPOSITORY}.git"
        COMMITER_NAME="${GITHUB_ACTOR}-github-actions"
        COMMITER_EMAIL="${GITHUB_ACTOR}-@users.noreply.github.com"
        REMOTE_BRANCH_EXISTS=$(git ls-remote --heads ${REMOTE} ${target_branch} | wc -l)
        
        echo "COMMITER_NAME: ${COMMITER_NAME}"
        echo "COMMITER_EMAIL: ${COMMITER_EMAIL}"
        echo "REMOTE: ${REMOTE}"
        
        
        mkdir /tmp/github-pages
        cd /tmp/github-pages
        
        if $keep_history && [ $REMOTE_BRANCH_EXISTS -ne 0 ]
        then
        echo remote exists
        echo clone repo
        git clone --quiet --branch ${target_branch} --depth 1 ${REMOTE} .
        else
        echo remote does not exist
        echo initialize repo
        git init .
        git checkout --orphan gh-pages
        fi
        
        echo "<h1>hello there</h1>" > index.html
        
        DIRTY=$(git status --short | wc -l)
        
        if $keep_history &&  [ $REMOTE_BRANCH_EXISTS -ne 0 ] && [ DIRTY = 0 ]
        then
        echo '⚠️ There are no changes to commit, stopping.'
        else
        echo
        echo log before commit
        git log
        git config user.name ${COMMITER_NAME}
        git config user.email ${COMMITER_EMAIL}
        git status --porcelain
        git add --all .
        git commit -m "DIST to ${target_branch}"
        echo
        echo log after commit
        git log
        
        echo 🏃 Deploying ${build_dir} directory to ${target_branch} branch on ${repo} repo
        
        if [ $keep_history == false]
        then
        echo pushing to remote
        git push --quiet ${REMOTE} ${target_branch}
        else
        echo force pushing to remote
        git push --quiet --force ${REMOTE} ${target_branch}
        fi
        fi
        echo 🎉 Content of ${build_dir} has been deployed to GitHub Pages.
        
        
        
        
      env:
        GITHUB_PAT: ${{ secrets.GITHUB_PAT }}
        target_branch: gh-pages 
        keep_history: true