name: release

on:
  push:
    branches:
      - main

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Compute next version
        id: version
        run: |
          latest=$(git tag --list 'v[0-9]*' --sort=-v:refname | head -n 1)
          if [ -z "$latest" ]; then
            next="v1.0.0"
          else
            latest=${latest#v}
            IFS='.' read -r major minor patch <<< "$latest"
            next="v${major}.${minor}.$((patch + 1))"
          fi
          echo "next=${next}" >> "$GITHUB_OUTPUT"

      - name: Build changelog
        id: changelog
        run: |
          prev_tag=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
          if [ -z "$prev_tag" ]; then
            log=$(git log --oneline --no-merges main | head -n 40)
          else
            log=$(git log --oneline --no-merges "$prev_tag"..main | head -n 40)
          fi
          {
            echo "body<<EOF"
            echo "## What's new in this release"
            echo ""
            echo "$log" | sed 's/^/- /'
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Create release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.next }}
          name: ${{ steps.version.outputs.next }}
          body: ${{ steps.changelog.outputs.body }}
          generate_release_notes: false