How can i append the data to an existing JSON file?

[talvasconcelos]

Hi, how can i append the data i get from front-matter to an existing json file? Here's what i have:

`gulp.task('meta', function(){
return gulp.src(path.posts)
.pipe(plumber({
handleError: onError
}))
.pipe(frontMatter({ property: 'meta'}))
//.pipe(data(function(file){
// file.meta.path = file.path
// }))
.pipe(pluck('meta', 'meta.json'))
.pipe(data(function(file){
file.contents = new Buffer(JSON.stringify({'articles': file.meta}, null, ' '));
//var obj = JSON.parse(require './config.json');
//obj.articles = file.contents;

}))
.pipe(gulp.dest('dev/articles/'))

});`

At the moment it outputs to a meta.json file, i'd like for it to append the data to an existing config.json under an "artilcles" key.

Thanks,
Tiago

[ghost]

This is from my project and works well.

1. Append static json
2. Append currFile
3. Append GrayMatter Data (works same as FrontMatter)

      .pipe(plugins.data(function (file) {
        let data = JSON.parse(fs.readFileSync(cacheFile));
        data.currFile = path.basename(file.path);
        return data;
      }))
      .pipe(plugins.grayMatter())