gulp-jscs Object.keys called on non-object

Question

I'm a novice at gulp, and trying to play with it. I get this error when I try to use gulp-jscs

'default' errored after 98 ms
[16:58:00] TypeError: Object.keys called on non-object
    at Function.keys (native)
    at NodeConfiguration.Configuration._throwNonCamelCaseErrorIfNeeded (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp-jscs/node_modules/jscs/lib/config/configuration.js:440:12)
    at NodeConfiguration.Configuration.load (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp-jscs/node_modules/jscs/lib/config/configuration.js:51:10)
    at StringChecker.configure (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp-jscs/node_modules/jscs/lib/string-checker.js:66:29)
    at Checker.configure (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp-jscs/node_modules/jscs/lib/checker.js:26:39)
    at module.exports (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp-jscs/index.js:31:11)
    at Gulp.<anonymous> (/home/kbadr/Node_Projects/demo/membership/gulpfile.js:22:15)
    at module.exports (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp/node_modules/orchestrator/lib/runTask.js:34:7)
    at Gulp.Orchestrator._runTask (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp/node_modules/orchestrator/index.js:273:3)
    at Gulp.Orchestrator._runStep (/home/kbadr/Node_Projects/demo/membership/node_modules/gulp/node_modules/orchestrator/index.js:214:10

and here's my gulpfile

var gulp = require('gulp');
var jscs = require('gulp-jscs');

gulp.task('default', function () {
    return gulp.src('src/app.js')
        .pipe(jscs());
});

Answer 1

This seems to happen if jscs doesn't have read access to your .jscsrc or if it doesn't exist. This happened to me after copying and pasting it from an old git repro. To fix this open the file with a text editor and resave it, accepting the prompt to overwrite as well as starting with a '.' (e.g. .jscsrc) Run your task again and it will complete.

Answer 2

I had the same problem: "Unable to load JSCS config file at /Desktop/node/My_Project_Name/.jscsrc Unexpected end of input...."

I was able to solve the problem by first checking to see if the file existed in the root of my project. in terminal run this command: ls -ld .?*

The file was never created for me so I created the .jscsrc file then I added the following code:

{
 "excludeFiles": ["node_modules/**", "bower_components/**"],

"requireCurlyBraces": [
    "if",
    "else",
    "for",
    "while",
    "do",
    "try",
    "catch"
],
"requireOperatorBeforeLineBreak": true,
"requireCamelCaseOrUpperCaseIdentifiers": true,
"maximumLineLength": {
  "value": 100,
  "allowComments": true,
  "allowRegex": true
},
"validateIndentation": 4,
"validateQuoteMarks": "'",

"disallowMultipleLineStrings": true,
"disallowMixedSpacesAndTabs": true,
"disallowTrailingWhitespace": true,
"disallowSpaceAfterPrefixUnaryOperators": true,
"disallowMultipleVarDecl": null,

"requireSpaceAfterKeywords": [
  "if",
  "else",
  "for",
  "while",
  "do",
  "switch",
  "return",
  "try",
  "catch"
],
"requireSpaceBeforeBinaryOperators": [
    "=", "+=", "-=", "*=", "/=", "%=", "<<=", ">>=", ">>>=",
    "&=", "|=", "^=", "+=",

    "+", "-", "*", "/", "%", "<<", ">>", ">>>", "&",
    "|", "^", "&&", "||", "===", "==", ">=",
    "<=", "<", ">", "!=", "!=="
],
"requireSpaceAfterBinaryOperators": true,
"requireSpacesInConditionalExpression": true,
"requireSpaceBeforeBlockStatements": true,
"requireLineFeedAtFileEnd": true,
"disallowSpacesInsideObjectBrackets": "all",
"disallowSpacesInsideArrayBrackets": "all",
"disallowSpacesInsideParentheses": true,

"validateJSDoc": {
    "checkParamNames": true,
    "requireParamTypes": true
},

"disallowMultipleLineBreaks": true,

"disallowCommaBeforeLineBreak": null,
"disallowDanglingUnderscores": null,
"disallowEmptyBlocks": null,
"disallowMultipleLineStrings": null,
"disallowTrailingComma": null,
"requireCommaBeforeLineBreak": null,
"requireDotNotation": null,
"requireMultipleVarDecl": null,
"requireParenthesesAroundIIFE": true
}

Save this file to the root of your project, then run the gulp task command again it should work.