tag-release-and-publish.yml

name: Tag, Release and Publish 

on:
  push:
    branches: ["main"]

permissions:
  contents: write

jobs:
  tag:
    runs-on: ubuntu-latest
    outputs:
      tag_created: ${{ steps.create_tag.outputs.tag_created }}
    steps:
      - name: Checkout the repository
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Get latest tag
        id: get_latest_tag
        run: |
          LATEST_TAG=$(git describe --tags --abbrev=0)
          echo "LATEST_TAG=$LATEST_TAG" >> $GITHUB_ENV

      - name: Get the current version
        id: get_version
        run: |
          VERSION=v$(cat Cargo.toml | grep -m 1 version | grep -o -P "\d+\.\d+\.\d+")
          echo "VERSION=$VERSION" >> $GITHUB_ENV

      - name: Create tag
        if: ${{env.VERSION != env.LATEST_TAG}}
        id: create_tag
        run: |
          git tag ${{env.VERSION}}
          git push origin ${{env.VERSION}}
          echo "tag_created=true" >> $GITHUB_OUTPUT

  release:
    needs: tag
    if: needs.tag.outputs.tag_created == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout the repository
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Get the current version
        id: get_version
        run: |
          VERSION=$(cat Cargo.toml | grep version | grep -o -P "\d+\.\d+\.\d+")
          echo "VERSION=$VERSION" >> $GITHUB_ENV

      - name: Get Changelog line
        run: |
          CHANGELOG_HEADER=$(cat CHANGELOG.md | grep "\[${{env.VERSION}}\]" | sed s/#//g | sed -E "s/\(.*\)//g" | sed "s/\ \[//g" | sed "s/\]//g" | sed "s/\ /-/g" | sed "s/\.//g")
          echo "CHANGELOG_HEADER=$CHANGELOG_HEADER" >> $GITHUB_ENV


      - name: Debug Info
        run: |
          echo "Version: ${{ env.VERSION }}"
          echo "Changelog Header: ${{ env.CHANGELOG_HEADER }}"

      
      - name: Check If Changelog Header is valid
        if: ${{ env.CHANGELOG_HEADER == '' }}
        run: exit 1

      - name: Create GitHub Release
        if: ${{ env.CHANGELOG_HEADER != '' }}
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: v${{ env.VERSION }}
          release_name: v${{ env.VERSION }}
          draft: false
          body: See changelog for this version [here](CHANGELOG.md#${{env.CHANGELOG_HEADER}})
          prerelease: false 

  publish:
    needs: [tag,release]
    if: needs.tag.outputs.tag_created == 'true'

    # Based on: https://users.rust-lang.org/t/does-anyone-use-github-actions-to-run-cargo-publish/92374/5
    name: Publish to crates.io
    runs-on: ubuntu-latest
    environment: crates.io
    steps:
      - uses: actions/checkout@v3
      - uses: swatinem/rust-cache@v2
      - name: cargo publish
      # https://doc.rust-lang.org/cargo/reference/config.html?highlight=CARGO_REGISTRY_TOKEN#credentials
        run: |
          cargo login ${{ secrets.CARGO_REGISTRY_TOKEN }} && cargo publish --verbose --locked