index.js

var through = require('through2');
var gutil = require('gulp-util');
var PluginError = gutil.PluginError;
var File = gutil.File;
var sources = []; // store the source file paths
var options = {};
var crypto = require('crypto');
var createFont = require('./lib/createFont').createFont;
var _ = require('lodash');
var fs = require('fs');

// Consts
const PLUGIN_NAME = 'gulp-webfont';

// -------------------------------------------------------
var bufferContents = function(file, enc, cb) {
  if (file.isNull()) {
    // return empty file
    return cb();
  }
  
  if (file.isStream()) {
    cb(new gutil.PluginError(PLUGIN_NAME, 'Streaming not supported'));
    return;
  }
  else if (file.isBuffer()) {
    sources.push(file.path);
  }
  cb();
}
// -------------------------------------------------------
var endStream = function (cb) {
  // all the input files are in, now convert them
  var that = this;
  createFont(options, sources, function(o) {
    // all the fontforge magic is done.
    // the generated files are in the temp folder now
    _.map(o.types, function(type) {
      var fn = o.full.file + '.' + type;
      var f = new File({path: o.fontFilename + "." + type});
      f.contents = fs.createReadStream(fn);
      that.push(f)
    })
    cb();
  });
}
function gulpWebfont(o) {
  options = o || {};
  // Creating a stream through which each file will pass
  return through.obj(bufferContents, endStream);
}

// Exporting the plugin main function
module.exports = gulpWebfont;