diagnostic-languageserver configuration for both flake8 and shellcheck

diagnostic-language-server.jsonc

{
  "clients": {
    "diagnostic-ls": {
      "enabled": true,
      "command": [
        "diagnostic-languageserver",
        "--stdio"
      ],
      "selector": "source.python | source.shell",
      "initializationOptions": {
        "linters": {
          // REF: https://gist.github.com/frou/f8c0da53bfadf3eb939d0e6699b306e1
          "flake8": {
            "command": "flake8",
            "debounce": 100,
            "args": [
              "--format",
              "%(row)d,%(col)d,%(code).1s,%(code)s  %(text)s",
              "-"
            ],
            "sourceName": "flake8",
            "formatLines": 1,
            "formatPattern": [
              "(\\d+),(\\d+),()([A-Z]),(.*)",
              {
                "line": 1,
                "column": 2,
                // Match a zero-length group so everything can be classified as a Warning rather than Error
                "security": 3,
                "message": 5
              }
            ],
            "securities": {
              "": "warning"
            }
          },
          // REF: https://gist.github.com/rchl/1077151a7339b734c1678fc626b123a2
          "shellcheck": {
            "command": "shellcheck",
            "debounce": 100,
            "args": [
              "--format=json",
              "-"
            ],
            "offsetLine": 0,
            "offsetColumn": 0,
            "sourceName": "shellcheck",
            "formatLines": 1,
            "parseJson": {
              "line": "line",
              "column": "column",
              "endLine": "endLine",
              "endColumn": "endColumn",
              "security": "level",
              "message": "\\${message} [\\${code}]",
            },
            "securities": {
              "error": "error",
              "warning": "warning",
              "note": "info"
            }
          }
        },
        "filetypes": {
          "python": [
            "flake8"
          ],
          "shellscript": "shellcheck"
        },
      },
    },
  }
}