Gulp Jscs - TypeError: cannot convert undefined or null to object

Question

I wanted to use gulp -jsc in my project, so I installed it according to the documentation :

npm install --save-dev gulp-jscs

But when I try to run the gulp file, I get this error:

TypeError: Cannot convert undefined or null to object
    at Function.keys (native)
    at copyConfiguration (C:\Users\[User]\Desktop\[Project]\
    node_modules\jscs\lib\config\configuration.js:920:12)

In addition, there are other errors associated with this:

at NodeConfiguration.Configuration.
_processConfig([location-path]\node_modules\jscs\lib\config\configuration.js:459:5)
    at NodeConfiguration.Configuration.load 
([location-path]\node_modules\jscs\lib\config\configuration.js:211:10)
    at null.StringChecker.configure 
([location-path]\node_modules\jscs\lib\string-checker.js:62:29)
    at null.Checker.configure ([location-path]\node_modules\jscs\lib\checker.js:27:39)
    at Object.module.exports ([location-path]\node_modules\gulp-jscs\index.js:35:10)
    at Gulp.<anonymous> ([location-path]\Gulpfile.js:60:17)
    at module.exports ([location-path]\node_modules\orchestrator\lib\runTask.js:34:7)
    at Gulp.Orchestrator._runTask ([location-path]\node_modules\orchestrator\index.js:273:3)
Process terminated with code 1.

Answer 1

There should be a file at the root of your project .jscsrc. There you can provide options for AOS , as well as code style rules that must be followed.

Below .jscsrc, which is used by ourselvesnode-jscs . You can use this to customize your own configuration.

{
    "preset": "google",
    "fileExtensions": [".js", "jscs"],

    "requireSemicolons": true,
    "requireParenthesesAroundIIFE": true,
    "maximumLineLength": 120,
    "validateLineBreaks": "LF",
    "validateIndentation": 4,
    "disallowTrailingComma": true,
    "disallowUnusedParams": true,

    "disallowSpacesInsideObjectBrackets": null,
    "disallowImplicitTypeConversion": ["string"],

    "safeContextKeyword": "_this",

    "jsDoc": {
        "checkAnnotations": "closurecompiler",
        "checkParamNames": true,
        "requireParamTypes": true,
        "checkRedundantParams": true,
        "checkReturnTypes": true,
        "checkRedundantReturns": true,
        "requireReturnTypes": true,
        "checkTypes": "capitalizedNativeCase",
        "checkRedundantAccess": true,
        "requireNewlineAfterDescription": true
    },

    "excludeFiles": [
        "test/data/**",
        "patterns/*"
    ]
}

, jscs , "preset" .jscsrc rules, .