index.js

'use strict';
var gutil = require('gulp-util');
var through = require('through2');
var tpl = require('lodash.template');
var PluginError = gutil.PluginError;

var PLUGIN_NAME = 'gulp-template-compile';

module.exports = function (options) {
    options = options || {};

    function compiler (file) {
        var name = typeof options.name === 'function' && options.name(file) || file.relative;
        var objectName = options.objectName || 'templates';
    		var IIFE_start = options.IIFE !== false ? '(function() {\n' : '';
    		var IIFE_end = options.IIFE !== false ? '})();' : '';

        var templateHeader = IIFE_start + 'var ' + objectName + ' = {};';

        var NSwrapper = '\n\n' + objectName + '["'+ name.replace(/\\/g, '/') +'"] = ';

        var template = tpl(file.contents.toString(), options.templateSettings).source;

        return templateHeader + NSwrapper + template + IIFE_end;
    }

    var stream = through.obj(function (file, enc, callback) {

        if (file.isNull()) {
            this.push(file);
            return callback();
        }

        if (file.isStream()) {
            this.emit('error', new PluginError(PLUGIN_NAME, 'Streams are not supported!'));
            return callback();
        }

        var filePath = file.path;

        try {
            var compiled = compiler(file);

            file.contents = new Buffer(compiled);
            file.path = gutil.replaceExtension(file.path, '.js');
        } catch (err) {
            this.emit('error', new PluginError(PLUGIN_NAME, err, {fileName: filePath}));
            return callback();
        }

        this.push(file);
        callback();
    });

    return stream;
};