Gulp Task to generate a JSON array of Font Awesome 4.* icons from the package

gulpfile.js

require('fs');
require('gulp');

/**
* Create JSON array of icons from Font Awesome _icons.scss (based on v4.*).
* Replace PATH_TO_FONT_AWESOME and PATH_TO_SAVE with your relevant paths.
*/
gulp.task('icons', function() {
  // Pattern to only match the icon name (excluding "fa-")
  var re  = /^.\#\{\$fa\-css\-prefix\}\-([a-z0-9\-]*)\:before { content: \$fa\-var\-[a-z0-9\-]*\; }$/gmi;

  // Read the SASS file line-by-line
  fs.readFile("PATH_TO_FONT_AWESOME/font-awesome/scss/_icons.scss", "utf-8", function(err, _data) {
    var icons = [];

    // Extract icon name (if any) on this line
    while ((icon = re.exec(_data)) != null) {
      icons.push(icon[1]);
    }

    // Save icons as a JSON string
    fs.writeFile('PATH_TO_SAVE/icons.json', JSON.stringify(icons), function(err) {});
  });
});