name: Lint
on:
  push:
    branches:
      - main
  pull_request:
  workflow_dispatch:

permissions:
  contents: read

jobs:
  lint:
    name: Lint (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-go@v6
        with:
          go-version-file: go.mod

      - name: Check Go version constraint
        if: matrix.os == 'ubuntu-latest'
        run: |
          GO_VERSION=$(grep '^go ' go.mod | awk '{print $2}')
          if [ "$GO_VERSION" != "1.20" ]; then
            echo "::error::go.mod directive must remain 'go 1.20' (Windows 7 support requirement)"
            echo "::error::Current value: go $GO_VERSION"
            exit 1
          fi

      - name: Check spelling
        if: matrix.os == 'ubuntu-latest'
        uses: crate-ci/typos@master
        with:
          config: ./.typos.toml

      - name: golangci-lint
        uses: golangci/golangci-lint-action@v8
        with:
          version: v2.10