name: Release

on:
  push:
    tags: ["v*"]
  workflow_dispatch:
    inputs:
      tag:
        description: Git tag to release (e.g. v0.4.0)
        required: true
        type: string

permissions:
  contents: write

jobs:
  goreleaser:
    name: GoReleaser
    if: github.server_url == 'https://github.com'
    runs-on: ubuntu-latest
    steps:
      # Always clone default branch first. workflow_dispatch often races with
      # tag creation; fetching refs/tags/X before it exists fails checkout.
      # Retry fetch, then check out the tag.
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Checkout release tag
        env:
          TAG: ${{ github.event_name == 'workflow_dispatch' && inputs.tag || github.ref_name }}
        run: |
          set -euo pipefail
          echo "Releasing tag: $TAG"
          for i in 1 2 3 4 5 6; do
            if git fetch --force origin "refs/tags/${TAG}:refs/tags/${TAG}"; then
              break
            fi
            echo "tag $TAG not visible yet (attempt $i); sleeping…"
            sleep 10
          done
          git rev-parse "refs/tags/${TAG}"
          git checkout --force "refs/tags/${TAG}"

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: stable
          cache: true

      - name: Run GoReleaser
        uses: goreleaser/goreleaser-action@v6
        with:
          distribution: goreleaser
          version: "~> v2"
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}