gulp-happiness

Gulp plugin for happiness

---

Installing

npm install --save gulp-happiness
# or using yarn cli 
yarn add gulp-happiness

Usage

Check out files with happiness linter

const gulp = require('gulp');
const gulpHappiness = require('gulp-happiness');
 
gulp.task('lint', function () {
    return gulp.src(['**/*.js','!node_modules/**'])
        // Attaches the lint data to the "eslint" property
        // of the file object so it can be used by other modules. 
        // By default it will skip files with empty content
        // and if filename starts with _ (underscore)
        .pipe(gulpHappiness())
        
        // eslint.format() outputs the lint results to the console.
        .pipe(gulpHappiness.format())
        
        // Look after checking all the streamed files,
        // and if at least one of them has errors it will fail.
        // Note! This method does not transfer files further to the stream!
        .pipe(gulpHappiness.failAfterError());
});

Lint files, fix and transfer

const gulp = require('gulp');
const gulpHappiness = require('gulp-happiness');
 
gulp.task('lint', function () {
    return gulp.src('./src/scripts/**/*.js')
        // Enable fixing - fix: true.
        // If auto fixing cannot be done, 
        // you will see message in console about it
        .pipe(gulpHappiness({
            fix: true
        }))
        
        // Show in console happy files ;)
        .pipe(gulpHappiness.format({
            showHappyFiles: true
        }))
        
        // Failing if file has eslint errors,
        // it will break task immediately.
        // Current file and all next not will be transferred
        .pipe(gulpHappiness.failOnError())
        
        // transfer files
        .pipe(gulp.dest('./dist/assets/js/'));
});

---

API

• gulpHappiness()

• gulpHappiness(options)

• gulpHappiness.format()

• gulpHappiness.format(formatterName)

• gulpHappiness.format(formatterFunction)

• gulpHappiness.format(formatterName/formatterFunction, options)

• gulpHappiness.failOnError()

• gulpHappiness.failOnError(options)

• gulpHappiness.failAfterError()

• gulpHappiness.failAfterError(options)

gulpHappiness()

No explicit configuration.
Linting with default options.
Attaches the lint data to the "eslint" property of the file object so it can be used by other modules.

gulpHappiness(options)

options.fix

type boolean / default undefined
Fix most issues automatically if set true.

Note! It will not fix original files in your fs.
It will fix files in stream and you must save them where you need by using gulp.dest() after linting

Note! If auto fixing cannot be done - you will see message in console about it.
Example of log:

options.linterOptions

type Object / default undefined
Options for happiness linter

options.linterOptions.globals

type Array.<string> / default undefined
Custom global variables to declare (e.g. ['jquery', '$'])

options.linterOptions.plugins

type Array.<string> / default undefined
Custom eslint plugins

options.linterOptions.envs

type Array.<string> / default undefined
Custom eslint environment

options.linterOptions.parser

type string / default undefined
Custom js parser (e.g. 'babel-eslint')

options.noUnderscore

type boolean / default true
File which name starts with _ (underscore) will be skipped and not using in stream next.

You will receive message in console if it happens.
Example of log:

options.noEmpty

type boolean / default true
File with empty content will be skipped and not using in stream next.
Note! Spaces, tabs and newlines will be treated as empty content.

You will receive message in console if it happens.
Example of log:

options.silent

type boolean / default undefined
No logs about noEmpty and noUnderscore files

gulpHappiness.format()

No explicit configuration.
Outputs the lint results to the console.
Default formatter is eslint-formatter-pretty

gulpHappiness.format(formatterName)

formatterName

type string
You can use formatter by default
gulpHappiness.format('default') - same as gulpHappiness.format()

or use one of the ESLint-provided formatters,
for example gulpHappiness.format('stylish')

or use some else formatter which you can install from npm https://www.npmjs.com/search?q=eslint+formatter
Example

npm i --save eslint-friendly-formatter

const gulp = require('gulp');
const gulpHappiness = require('gulp-happiness');
 
gulp.task('lint', function () {
    return gulp.src(['**/*.js','!node_modules/**'])
        .pipe(gulpHappiness())
        .pipe(gulpHappiness.format('eslint-friendly-formatter'))
});

gulpHappiness.format(formatterFunction)

formatterFunction(results[, formatterOptions])

type function

Parameters:

Name	Data type	Description
results	Array	Results of eslint
formatterOptions	Object/undefined	Options for formatter

You can use own function or existing formatters as function https://www.npmjs.com/search?q=eslint+formatter

Note! Function will receive results array from eslint data for formatting.
And it is must return output as string if has problems in received results for console or some negative value, e.g. null | undefined | false | ''.

Example with custom formatter function

const gulp = require('gulp');
const gulpHappiness = require('gulp-happiness');
 
gulp.task('lint', function () {
    return gulp.src(['**/*.js','!node_modules/**'])
        .pipe(gulpHappiness())
        .pipe(gulpHappiness.format(function(results, formatterOptions={}) {
            // process results and options
            // ...
            
            let output = myOwnMethodForTransformResults(results, transformOptions);
            
            return output;
        }))
});

Example with installed formatter function

npm i --save eslint-friendly-formatter

const gulp = require('gulp');
const gulpHappiness = require('gulp-happiness');
const eslintFriendlyFormatter = require('eslint-friendly-formatter');
 
gulp.task('lint', function () {
    return gulp.src(['**/*.js','!node_modules/**'])
        .pipe(gulpHappiness())
        .pipe(gulpHappiness.format(eslintFriendlyFormatter))
});

gulpHappiness.format(formatterName/formatterFunction, options)

formatterName/formatterFunction

see above formatterName and formatterFunction

options.formatterOptions

type Object / default undefined
Options for the chosen formatter

options.showHappyFiles

type boolean / default undefined
Show files without problems in console

Example of log:

options.noUnderscore

Same as gulpHappiness(options) → options.noUnderscore

options.noEmpty

Same as gulpHappiness(options) → options.noEmpty

options.silent

Same as gulpHappiness(options) → options.silent

gulpHappiness.failOnError()

No explicit configuration.

gulpHappiness.failOnError(options)

options.disabled

type boolean / default undefined
Not fail on errors

options.onEnd(errorMsg, eslintData)

type fucnction / default undefined

Parameters:

Name	Data type	Description
errorMsg	null/string	Is null if no errors were found and is string if errors were found. String contains a short message about errors
eslintData	Object	eslint data from file

Its call will be before ending of pipe. So you don't need apply no callbacks or return some values.
You can use it for own custom actions, e.g rewrite some globals.
Note! Even if options.disabled - is true - this function will be called

options.noUnderscore

Same as gulpHappiness(options) → options.noUnderscore

options.noEmpty

Same as gulpHappiness(options) → options.noEmpty

options.silent

Same as gulpHappiness(options) → options.silent

gulpHappiness.failAfterError()

No explicit configuration.

gulpHappiness.failAfterError(options)

options.disabled

Same as gulpHappiness.failOnError(options) → options.disabled

options.onEnd(errorMsg, errorFilesPaths, allErrorsCount)

type fucnction / default undefined

Parameters:

Name	Data type	Description
errorMsg	null/string	Is null if no errors were found and is string if errors were found. String contains a short message about errors
errorFilesPaths	Array	Array of files with errors. It will an empty if no files.
allErrorsCount	number	Count of all errors. Will be 0 if no errors

Its call will be before ending of pipe. So you don't need apply no callbacks or return some values.
You can use it for own custom actions, e.g rewrite some globals.
Note! Even if options.disabled - is true - this function will be called

options.noUnderscore

Same as gulpHappiness(options) → options.noUnderscore

options.noEmpty

Same as gulpHappiness(options) → options.noEmpty

options.silent

Same as gulpHappiness(options) → options.silent

Tests

1. npm test for testing code style and run mocha tests
2. npm run happiness-fix for automatically fix most of problems with code style

Changelog

Please read CHANGELOG.md

Contributing

Please read CONTRIBUTING.md