name: release

on:
  push:
    tags:
      - "v*"
  workflow_dispatch:
    inputs:
      tag:
        description: "Tag to (re)release (e.g. v0.1.0)"
        required: true
        type: string

permissions:
  contents: write

jobs:
  goreleaser:
    runs-on: macos-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Setup Go
        uses: actions/setup-go@v6
        with:
          go-version-file: go.mod
          cache: true

      - name: Stash GoReleaser config
        run: cp .goreleaser.yaml /tmp/.goreleaser.yaml

      - name: Validate release tag
        if: ${{ github.event_name == 'workflow_dispatch' }}
        env:
          RELEASE_TAG: ${{ inputs.tag }}
        run: |
          if ! echo "$RELEASE_TAG" | grep -qE '^v[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.]+)?$'; then
            echo "::error::Invalid tag format: $RELEASE_TAG"
            exit 1
          fi

      - name: Checkout release tag
        if: ${{ github.event_name == 'workflow_dispatch' }}
        env:
          RELEASE_TAG: ${{ inputs.tag }}
        run: git checkout "$RELEASE_TAG"

      - name: GoReleaser
        uses: goreleaser/goreleaser-action@v7
        with:
          distribution: goreleaser
          version: latest
          args: release --clean --config /tmp/.goreleaser.yaml
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}