Example MSBuild GitHub Actions problem matcher

msbuild-problem-matcher.json

{
    "problemMatcher": [
        {
            "owner": "reupen-vs2022",
            "pattern": [
                {
                    "regexp": "^(?:\\s+\\d>)([\\w\\-:\\\\\\.]+)(?:\\((\\d+),(\\d+)\\)):\\s+(error|warning)\\s(\\w*): ([^\\[\\]]+)\\s\\[.*\\]$",
                    "file": 1,
                    "line": 2,
                    "column": 3,
                    "severity": 4,
                    "message": 6,
                    "code": 5
                }
            ]
        }
    ]
}

Based on an example message of:

      4>D:\a\columns_ui\columns_ui\pfc\win-objects.cpp(379,20): warning C4996: 'GetVersion': was declared deprecated [D:\a\columns_ui\columns_ui\pfc\pfc.vcxproj]

See https://github.com/actions/toolkit/blob/main/docs/commands.md#problem-matchers and https://github.com/actions/toolkit/blob/master/docs/problem-matchers.md for more details.

A custom logger is a much more flexible solution: https://github.com/reupen/msbuild-github-logger