catstodon/.github/workflows/haml-lint-problem-matcher.json

{
  "problemMatcher": [
    {
      "owner": "haml-lint",
      "severity": "warning",
      "pattern": [
        {
          "regexp": "^(.*):(\\d+)\\s\\[W]\\s(.*):\\s(.*)$",
          "file": 1,
          "line": 2,
          "code": 3,
          "message": 4
        }
      ]
    }
  ]
}