name: Automatic Release

on:
  push:
    branches:
      - main
    paths:
      - 'seafile-server/**'
      - 'seahub/**'
      - 'seahub-media/**'
  workflow_dispatch:
    inputs:
      folder:
        description: 'Which folder to release (seafile-server/seahub/seahub-media)?'
        required: true

jobs:
  create_release:
    runs-on: ubuntu-latest
    steps:
    - name: Check out code
      uses: actions/checkout@v3

    - name: Determine Changed Directory and Extract Version
      id: dir_version
      run: |
        if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
          FOLDER_CHANGED=${{ github.event.inputs.folder }}
        else
          FOLDER_CHANGED=$(git diff --name-only HEAD^ HEAD | cut -d '/' -f1 | uniq)
        fi
        if [[ -f "$FOLDER_CHANGED/Dockerfile" ]]; then
          SEAFILE_VERSION=$(grep 'SEAFILE_VERSION' $FOLDER_CHANGED/Dockerfile | awk -F'SEAFILE_VERSION=' '{print $2}' | awk '{print $1}')
          echo "SEAFILE_VERSION=$SEAFILE_VERSION" >> $GITHUB_ENV
        fi
        echo "FOLDER_CHANGED=$FOLDER_CHANGED" >> $GITHUB_ENV

    - name: Get Previous Build Number and Compute Next
      id: build_number
      run: |
        LATEST_TAG=$(curl -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
        https://api.github.com/repos/${{ github.repository }}/tags | \
        jq -r --arg FOLDER "$FOLDER_CHANGED" '.[] | select(.name | startswith($FOLDER)) | .name' | head -1)

        if [[ $LATEST_TAG ]]; then
          PREVIOUS_BUILD=$(echo $LATEST_TAG | awk -F_ '{print $3}')
          NEXT_BUILD=$(printf "%03d" $((10#$PREVIOUS_BUILD + 1)))
        else
          NEXT_BUILD="001"
        fi
        echo "NEXT_BUILD=$NEXT_BUILD" >> $GITHUB_ENV

    - name: Get Commit Messages
      id: commit_messages
      run: |
        MESSAGES=$(git log --pretty=format:"%s" $(git describe --tags --abbrev=0)..HEAD -- $FOLDER_CHANGED)
        echo "MESSAGES=$MESSAGES" >> $GITHUB_ENV

    - name: Create Release
      if: env.FOLDER_CHANGED != '' && env.SEAFILE_VERSION != ''
      uses: actions/create-release@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        tag_name: ${{ env.FOLDER_CHANGED }}-${{ env.SEAFILE_VERSION }}_${{ env.NEXT_BUILD }}
        release_name: ${{ env.FOLDER_CHANGED }}-${{ env.SEAFILE_VERSION }}_${{ env.NEXT_BUILD }}
        body: ${{ env.MESSAGES }}
        draft: false
        prerelease: false