name: golangci-lint
on:
  # For now, only lint pull requests, not the main branches.
  pull_request:

  # TODO(andrew): enable for main branch after an initial waiting period.
  #push:
  #  branches:
  #    - main

  workflow_dispatch:

permissions:
  contents: read
  pull-requests: read

concurrency:
  group: ${{ github.workflow }}-$${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  golangci:
    name: lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7

      - uses: actions/setup-go@v4
        with:
          go-version-file: go.mod
          cache: false

      - name: golangci-lint
        # Note: this is the 'v6.1.0' tag as of 2024-08-21
        uses: golangci/golangci-lint-action@aaa42aa0628b4ae2578232a66b541047968fac86
        with:
          version: v1.60

          # Show only new issues if it's a pull request.
          only-new-issues: true