I am not sure on to make the below given code to work:
var language = ['en', 'sp'];
gulp.task('jsonResourcesConcat', function() {
return gulp.src('path/to/json/' + language + '/resources.json')
.pipe(insert.prepend('window.resourcesData.' + language + ' = '))
.pipe(concat('resources-' + language +'.js'))
.pipe(gulp.dest('./www/assets/json2js/'));
});
I need the file should be output to folder ./www/assets/json2js/ with file names 'resources-en.js' and 'resources-sp.js'
Ok, let's start from your script:
var languages = ['en', 'sp'];
// this is the function that does all the work
function buildJson(language) {
return gulp.src('path/to/json/' + language + '/resources.json')
.pipe(insert.prepend('window.resourcesData.' + language + ' = '))
.pipe(concat('resources-' + language +'.js'))
.pipe(gulp.dest('./www/assets/json2js/'));
});
Now install the EventStream module to handle streams easily:
$ npm install event-stream
And use it to pipe Gulp streams
var es = require('event-stream');
// now define the gulp task
gulp.task('jsonResourcesConcat', function gulpTask(){
// build the streams
var streams = languages.map( buildJson );
// now merge the streams together
// see the doc here: https://www.npmjs.com/package/event-stream#merge-stream1streamn-or-merge-streamarray
return es.merge( streams );
});
A similar answer can also be found here: How to batch similar gulp tasks to reduce code repetition
