gulp-merge-json

A gulp plugin for deep-merging multiple JSON files into one file. Export as JSON or a node module.

Usage

var merge = require('gulp-merge-json');

/*
	Basic functionality
 */
gulp.src('jsonFiles/**/*.json')
	.pipe(merge('combined.json'))
	.pipe(gulp.dest('./dist'));

/*
	Edit JSON with function
 */
gulp.src('jsonFiles/**/*.json')
	.pipe(merge('combined.json', function(parsedJson) {
		if (parsedJson.someValue) {
			delete parsedJson.otherValue;
		}

		return parsedJson;
	}))
	.pipe(gulp.dest('./dist'));

/*
	Provide a default object (files are merged in order so object values will be overwritten)
 */
gulp.src('jsonFiles/**/*.json')
	.pipe(merge('combined.json', false, {someKey: 'defaultValue'}))
	.pipe(gulp.dest('./dist'));

/*
	Provide an overwriting object (merged at the end)
 */
gulp.src('jsonFiles/**/*.json')
	.pipe(merge('combined.json', false, false, {someKey: 'specialValue'}))
	.pipe(gulp.dest('./dist'));

/*
	Wrap in var
 */
gulp.src('jsonFiles/**/*.json')
	.pipe(merge('dataModule.js', false, false, false, 'my.var'))
	.pipe(gulp.dest('./dist'));

Example Input

/*
	json/defaults.json
 */
{
	"key1": {
		"data1": "value1",
		"data2": "value2"
	},
	"key2": {
		"dataA": "valueA",
		"dataB": {
			"a": "b",
			"c": "d"
		}
	}
}

/*
	json/development.json
 */
{
	"key1": {
		"data1": "devValue"
	},
	"key2": {
		"dataB": {
			"c": "DEV MODE!"
		}
	},
	"key3": {
		"important": "value"
	}
}

Example Output

/*
	dist/combined.json
 */
{
	"key1": {
		"data1": "devValue",
		"data2": "value2"
	},
	"key2": {
		"dataA": "valueA",
		"dataB": {
			"dataA": "valueA",
			"dataB": {
				"a": "b",
				"c": "DEV MODE!"
			}
		}
	},
	"key3": {
		"important": "value"
	}
}