release.yml

name: Publish GitHub Release

on:
  push:
    tags: ["v*"]
  workflow_dispatch:
    inputs:
      tag:
        description: Marketplace tag to publish
        required: true
        type: string

permissions:
  contents: write

concurrency:
  group: github-release-${{ github.ref }}
  cancel-in-progress: false

jobs:
  publish:
    runs-on: ubuntu-latest
    steps:
      - name: Create GitHub Release from a marketplace tag
        env:
          GH_TOKEN: ${{ github.token }}
          # No checkout here, so gh cannot infer the repo from a git remote.
          GH_REPO: ${{ github.repository }}
          TAG: ${{ inputs.tag || github.ref_name }}
        run: |
          case "$TAG" in
            v*) ;;
            *) echo "tag must start with v: $TAG" >&2; exit 1 ;;
          esac
          if gh release view "$TAG" >/dev/null 2>&1; then
            exit 0
          fi
          if ! gh release create "$TAG" --verify-tag --title "$TAG" --generate-notes; then
            gh release view "$TAG" >/dev/null
          fi