tag.yml

# Tags on commit to main branch
# - Checks out the repository.
# - Determines the latest tag in the repository.
# - Creates a new tag from the latest tag, and increments patch version by 1.
# - Pushes the new tag to the remote repository.

name: Tag on Merge

on:
  push:
    branches:
      - main

jobs:
  tag:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          fetch-depth: 0 

      - name: Determine latest tag
        id: latest_tag
        run: |
          latest_tag=$(git describe --tags --abbrev=0)
          echo "::set-output name=tag::$latest_tag"

      - name: Determine incremented tag
        id: incremented_tag
        run: |
          IFS='.' read -r -a version_parts <<< "${{ steps.latest_tag.outputs.tag }}"
          major="${version_parts[0]}"
          minor="${version_parts[1]}"
          patch="${version_parts[2]}"
          patch=$((patch + 1))
          incremented_tag="${major}.${minor}.${patch}"
          echo "::set-output name=tag::$incremented_tag"

      - name: Create and push tag
        run: |
          git tag "${{ steps.incremented_tag.outputs.tag }}"
          git push origin "${{ steps.incremented_tag.outputs.tag }}"