release.yml

name: Release

on:
  workflow_dispatch:
    inputs:
      bump:
        description: "Version bump (patch | minor | major)"
        type: choice
        options:
          - patch
          - minor
          - major
        required: true
        default: patch

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write          # allow push + release

    steps:
    - uses: actions/checkout@v4       # first-party
      with:
        fetch-depth: 0                # we need all tags

    - uses: actions/setup-go@v5       # first-party
      with:
        go-version: '1.22'

    # ───────── 1. figure out next tag ─────────
    - id: version
      shell: bash
      run: |
        last=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
        echo "previous=$last" >>"$GITHUB_OUTPUT"

        v=${last#v}; IFS=. read -r major minor patch <<<"$v"
        case "${{ github.event.inputs.bump }}" in
          patch) patch=$((patch+1));;
          minor) minor=$((minor+1)); patch=0;;
          major) major=$((major+1)); minor=0; patch=0;;
        esac
        next="v${major}.${minor}.${patch}"
        echo "next=$next" >>"$GITHUB_OUTPUT"

    # ───────── 2. create & upload release ─────────
    - name: Create GitHub release
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      shell: bash
      run: |
        tag=${{ steps.version.outputs.next }}
        gh release create "$tag" \
          --title "$tag" \
          --generate-notes