index.js

var es = require('event-stream');
var path = require('path');
var gutil = require('gulp-util');
var concat = require('gulp-concat');
var header = require('gulp-header');
var footer = require('gulp-footer');
var htmlJsStr = require('js-string-escape');

/**
 * "constants"
 */

var TEMPLATE_HEADER = 'define(function (require) {var $templateCache = [];';
var TEMPLATE_FOOTER = 'return {load: function(templateName){if ($templateCache[templateName] == undefined) {return templateName;}var div = document.createElement(\'div\');div.innerHTML = $templateCache[templateName];return div;}};});';
var DEFAULT_FILENAME = 'templates.js';
var DEFAULT_MODULE = 'templates';
var MODULE_TEMPLATES = {

    // requirejs: {
    // header: 'define([\'angular\'], function(angular) { \'use strict\'; return ',
    // footer: '});'
    // },

    // browserify: { // not tested
    // header: 'module.exports = '
    // }

};

/**
 * Add files to templateCache.
 */

function templateCacheFiles(root, base) {

    return function templateCacheFile(file, callback) {
        var template = '$templateCache["<%= url %>"] = "<%= contents %>";';
        var url;

        file.path = path.normalize(file.path);

        /**
         * Rewrite url
         */

        if (typeof base === 'function') {
            url = path.join(root, base(file));
        } else {
            url = path.join(root, file.path.replace(base || file.base, ''));
        }

        /**
         * Normalize url (win only)
         */

        if (process.platform === 'win32') {
            url = url.replace(/\\/g, '/');
        }

        /**
         * Create buffer
         */

        file.contents = new Buffer(gutil.template(template, {
            url: url,
            contents: htmlJsStr(file.contents),
            file: file
        }));

        callback(null, file);

    };

}

/**
 * templateCache a stream of files.
 */

function templateCacheStream(root, base) {

    /**
     * Set relative base
     */

    if (typeof base !== 'function' && base && base.substr(-1) !== path.sep) {
        base += path.sep;
    }

    /**
     * templateCache files
     */

    return es.map(templateCacheFiles(root, base));

}

/**
 * Wrap templateCache with module system template.
 *

 function wrapInModule(moduleSystem) {
  var moduleTemplate = MODULE_TEMPLATES[moduleSystem];

  if (!moduleTemplate) {
    return gutil.noop();
  }

  return es.pipeline(
    header(moduleTemplate.header || ''),
    footer(moduleTemplate.footer || '')
  );

}
 */

/**
 * Concatenates and registers AngularJS templates in the $templateCache.
 *
 * @param {string} [filename='templates.js']
 * @param {object} [options]
 */

function templateCache(filename, options) {

    /**
     * Prepare options
     */

    if (typeof filename === 'string') {
        options = options || {};
    } else {
        options = filename || {};
        filename = options.filename || DEFAULT_FILENAME;
    }

    /**
     * Normalize moduleSystem option
     */

    if (options.moduleSystem) {
        options.moduleSystem = options.moduleSystem.toLowerCase();
    }

    /**
     * Build templateCache
     */

    return es.pipeline(
        templateCacheStream(options.root || '', options.base),
        concat(filename),
        header(TEMPLATE_HEADER, {
            module: options.module || DEFAULT_MODULE//,
            // standalone: options.standalone ? ', []' : ''
        }),
        footer(TEMPLATE_FOOTER)//,
        // wrapInModule(options.moduleSystem)
    );

}


/**
 * Expose templateCache
 */

module.exports = templateCache;