gulp-nube-inject/index.js

gulp plugins for html template js or css inject

'use strict';

var gutil = require('gulp-util');
var PluginError = gutil.PluginError;
var through = require('through2');
var Path = require('path');

var PLUGIN_NAME = 'gulp-nube-inject';

var RE_NUBE_INJECT = /\<\!\-\-\s*Nube\-Inject\s*\:((.*)\.(.*))\s*\-\-\>[\s\S]+?\<\!\-\-\s*Nube\-Inject\-End\s*\-\-\>/gm;

var HTML = {
	'scss|less|css' : '<link type="text/css" rel="stylesheet" href="<%=src%>">',
	'js|coffee|ts' : '<script type="text/javascript" src="<%=src%>"></script>'
};
/////////////////////////////////////
// Main Gulp Nube Pullout function //
/////////////////////////////////////
module.exports = function(manifest) {

	function replacement(source, _tempContents) {
		return _tempContents.replace(RE_NUBE_INJECT, function($1, $2, $3, $4) {
			var paths = Path.parse(source);
			paths.name = $3;
			paths.base = $2;
			return tagFactory($4, Path.format(paths));
		});
	}

	// <link> ==> .scss|.less|.css
	// <script> ==> .js|.coffee|.ts
	function tagFactory(ext, pathKey) {
		var src = Path.relative(Path.parse(pathKey).dir, manifest[pathKey.trim()] || ""),
			tmpl = "";

		if (src) {
			for (var i in HTML) {
				if (HTML.hasOwnProperty(i) && i.split('|').indexOf(ext.trim()) > -1) {
					tmpl = HTML[i];
				}
			}

			if (tmpl) {
				return tmpl.replace(/\<\%\=\s*src\s*\%\>/gm, src);
			} else {
				return "";
			}
		}

		return "";
	}

	return through.obj(function(file, enc, cb) {
		var _tempContents = "",
			paths = null;
		if (file.isNull()) {
			return cb();
		}

		if (file.isStream()) {
			return cb(new PluginError(file, "Streaming not supported"));
		}

		_tempContents = replacement(file.relative, file.contents.toString());

		file.contents = new Buffer(_tempContents);

		cb(null, file);
	});
};