gulp-crisper/index.js

Gulp plugin for crisper that split inline scripts from an HTML file for CSP compliance

'use strict';
var path = require('path');
var gutil = require('gulp-util');
var through = require('through2');
var crisper = require('crisper');
var oassign = require('object-assign');

function splitFile(file, filename, contents) {
	return new gutil.File({
		cwd: file.cwd,
		base: file.base,
		path: path.join(path.dirname(file.path), filename),
		contents: new Buffer(contents)
	});
}

function getFilename(filepath) {
	var basename = path.basename(filepath, path.extname(filepath));
	return {
		html: basename + '.html',
		js: basename + '.js'
	};
}

module.exports = function (opts) {
	return through.obj(function (file, enc, cb) {
		if (file.isNull()) {
			cb(null, file);
			return;
		}

		if (file.isStream()) {
			cb(new gutil.PluginError('gulp-crisper', 'Streaming not supported'));
			return;
		}

		var splitfile = getFilename(file.path);
		var split = crisper(oassign({}, {
			source: file.contents.toString(),
			jsFileName: splitfile.js
		}, opts));
		var stream = this;

		Object.keys(split).forEach(function (type) {
			if (split[type]) {
				stream.push(splitFile(file, splitfile[type], split[type]));
			}
		});

		cb();
	});
};