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README.md

node-ff-assets

A Node.js library providing automatic site assets aggregation.

Installation

npm install node-ff-assets --save

Example Application

There is a fully working express example application in the example folder. This contains bootstrap and angularjs and ejs templates and results in single html/js/css file.

Usage

note: www_static/[js/css]/lib are scm version ignored.

example-assets.json

{
	"linkMapping" : {
		"/static/module/bootstrap/": "node_modules/bootstrap/dist/",
		"/static/module/flot/":      "node_modules/flot/",
		"/static/":                  "www_static/"
	},
	"css": {
		"linkTarget":                "/static/css/lib/assets.css",
		"linkSources": [
			"/static/module/bootstrap/css/bootstrap.css"
		]
	},
	"js": {
		"linkTarget":                "/static/js/lib/assets.js",
		"linkSources": [
			"/static/js/lib/jquery-2.1.3/jquery.js@http://code.jquery.com/jquery-2.1.3.js",
			"/static/module/bootstrap/js/bootstrap.js",
			"/static/module/flot/jquery.flot.js",
			"/static/module/flot/jquery.flot.resize.js",
			"/static/module/flot/jquery.flot.pie.js",
			"/static/js/lib/angularjs-1.4.0-b4/angular.js@https://code.angularjs.org/1.4.0-beta.4/angular.js",
			"/static/js/lib/angularjs-1.4.0-b4/angular-route.js@https://code.angularjs.org/1.4.0-beta.4/angular-route.js",
			"/static/js/lib/angularjs-1.4.0-b4/angular-resource.js@https://code.angularjs.org/1.4.0-beta.4/angular-resource.js",
			"/static/js/lib/angularjs-1.4.0-b4/angular-touch.js@https://code.angularjs.org/1.4.0-beta.4/angular-touch.js"
		]
	}
}

example.js

var express  = require('express');
var async    = require('async');
var path     = require('path');
var assets   = require('node-ff-assets');

function buildAssets(server,callbackDone) {
	var singleResult = 'false' !== process.env.DEV_ASSETS_SINGLE_RESULT;
	var assetsConfig = require('./example-assets.json'); 
	assets.build({
		assets: {
			js: {
				configCreate: assets.factory.builder.configCreate.fromJSON(assetsConfig,'js'),
				configFill: function (config, callback) {
					async.series([
						assets.factory.lib.async.pushLinkSources(config,  '/static/js/',             'www_static/js/'),
						assets.factory.lib.async.pushLinkSources(config,  '/static/js/controller/',  'www_static/js/controller/'),
					],callback);
				},
			},
			css: {
				configCreate: assets.factory.builder.configCreate.fromJSON(assetsConfig,'css'),
				configFill: function (config, callback) {
					async.series([
						assets.factory.lib.async.pushLinkSources(config,  '/static/css/',            'www_static/css/'),
					],callback);
				},
			},
		},
		assemblerCreate: assets.factory.builder.assemblerCreate.readFileRegex(),
		assemblerFill: function (assembler, callback) {
			var serverResultKey = 'ff_assets_'+assembler.config.assetType;
			assembler.on ('log',    assets.factory.assembler.event.log.console(assembler.config.assetType));
			assembler.on ('result', assets.factory.assembler.event.result.objectSet(server,serverResultKey));
			assembler.config.linkTargetSingleResult = singleResult;
			callback();
		},
	},callbackDone);
}

function renderPage(server) {
    return function (req, res) {
        res.render('index', {
            pageTitle:      'node-ff-assets example',
            pageKeywords:   'node,ff,assets,example,ui',
            pageCssFiles:   server.get('ff_assets_css'),
            pageJsFiles:    server.get('ff_assets_js'),
        });
    };
}

var server = express();
buildAssets(server,function(err) {
	if (err) {
		throw err;
	}
	console.info('Server assets done.');
	
	server.get('/example-ui',renderPage(server));
	
	...snip..  config rest of server
});

index.ejs

<!DOCTYPE html>
<html lang="en" ng-app="exampleUI">
	<head>
		<title><%= pageTitle %></title>
		<meta charset="UTF-8">
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<meta name="keywords" content="<%= pageKeywords %>">
		<% if (pageCssFiles.length) { %><% pageCssFiles.forEach(function (cssFile) { %><link rel="stylesheet" href="<%= cssFile %>"><% }) %><% } %>
	</head>
	<body>
		<div id="wrapper">
			<div ng-include="'/example-ui/thtml/layout/header'"></div>
			<div id="page-wrapper">
				<div id="container-fluid">
					<div ng-view></div>
				</div>
			</div>
		</div>
		<div ng-include="'/example-ui/thtml/layout/footer'"></div>
		<% if (pageJsFiles.length) { %><% pageJsFiles.forEach(function (jsFile) { %><script src="<%= jsFile %>"></script><% }) %><% } %>
	</body>
</html>

Config options

The config option of the objects are filled from config templates with defaults.

Builder Config

Only configCreate if required to set in root and/or in asset.

var template = {
	buildOrder: ['css','js'],
	
	configCreate:    null,
	configFill:      factory.builder.configCreate.nop(),
	assemblerCreate: factory.builder.assemblerCreate.readFile(),
	assemblerFill:   factory.builder.configCreate.nop(),
	
	assets: {
		js: {
			configCreate:    null,
			configFill:      null,
			assemblerCreate: null,
			assemblerFill:   null,
		},
		css: {
			configCreate:    null,
			configFill:      null,
			assemblerCreate: null,
			assemblerFill:   null,
		},
	},
};

Assembler Config

required: assetType,linkTarget,linkSources and linkMapping.

var name = 'node-ff-assets';
var downloadTimeout  = (1000*10)   * 6;  // 1min
var downloadMaxSize  = (1024*1024) * 10; // 10mb

var template = {
	downloadStartDelay: null,
	downloadForce: false,
	downloadOptions: {
		timeout: downloadTimeout,
		maxResponseLength: downloadMaxSize,
		agent: name+' remote fetcher',
	},
	
	linkTargetSingleResult: true,
	linkTarget:     null,
	linkSources:    [],
	linkMapping:    [],
	
	assetType:      null,
	assetHeader:    '/* '+name+': Auto generated. */\n',
	assetFooter:    '/* '+name+': end */\n',
	assetSeperator: '\n/* '+name+': <%= file %> */\n\n',
};

Assembler Download Force

Sometimes its needed for have forces downloads of a resource. This can be done by adding an extra @ sign.

linkSources: ['/static/js/lib/dynamic-generated.js@@http://localhost:8080/example-ui/include-js/generateModels'];

note: if using localhost to download use the downloadStartDelay option and start server before building.

The downloadForce option will redownload all resources of asset group.

Target/Source locations

The asset target file location is a derived value.

Its created by mapping the assemblerConfig.linkTarget in the assemblerConfig.linkMapping keys to get a prefix for the local file system location.

The same is also true for the assemblerConfig.linkSources list which are url paths which need to be mapped to the file system files by the assemblerConfig.linkMapping data.

linkTarget: '/static/js/ffa/assets.js',
linkMapping: ['/static/':'www_static/',],
linkSources: ['/static/js/site.js','/static/js/ffa/jquery-2.1.3/jquery.js@http://code.jquery.com/jquery-2.1.3.js'],

Result;

public js  file: http://localhost:8080/static/js/site.js
public js  file: http://localhost:8080/static/js/ffa/assets.js
public js  file: http://localhost:8080/static/js/ffa/jquery-2.1.3/jquery.js
filesystem file: www_static/js/site.js
filesystem file: www_static/js/ffa/assets.js
filesystem file: www_static/js/ffa/jquery-2.1.3/jquery.js
.gitignore line: www_static/js/ffa

if buildConfig.linkTargetSingleResult = true then result
  static/js/ffa/assets.js
else
  static/js/site.js
  static/js/ffa/jquery-2.1.3/jquery.js

Objects

For some use cases the assets.build(config,callback) is flexable enough. Then there are two objects which may provide the needed options.

Object AssetsBuilder

var assets = require('node-ff-assets');
var builderConfig = {...};

// Create builder
var assetsBuilderA = new assets.AssetsBuilder(builderConfig);

// Run all
assetsBuilderB.runAll(function(err) {
	//done
});

// Run singles
async.series([
	assetsBuilderC.runAsset('css'),
	assetsBuilderD.runAsset('js'),
],function(err) {
	//done
});

Object AssetAssembler

var assets = require('node-ff-assets');
var assemblerConfig = {...};

// Create default assembler.
var assetAssemblerA = new assets.AssetAssembler(assemblerConfig);

// Same as default, plain inclusion of content.
var assetAssemblerB = new assets.AssetAssembler(assemblerConfig,assets.factory.assembler.constructor.readFile());

// Filter content based on regexes
var assetAssemblerF = new assets.AssetAssembler(assemblerConfig,assets.factory.assembler.constructor.readFileRegex());
var assetAssemblerH = new assets.AssetAssembler(assemblerConfig,assets.factory.assembler.constructor.readFileRegex(regexData));

// Minify content, with optional Minify config options.
var assetAssemblerC = new assets.AssetAssembler(assemblerConfig,assets.factory.assembler.constructor.readFileMinify());
var assetAssemblerD = new assets.AssetAssembler(assemblerConfig,assets.factory.assembler.constructor.readFileMinify(minifyOptions));

// Third party content modifiers, with readFile function
var assetAssemblerE = new assets.AssetAssembler(buildConfig,function(file,callback) {
	// should return file data to callback(err,data);
);

// Registrate events (note: may change a bit)
assetAssemblerA.on('begin',               function() { });
assetAssemblerA.on('end',                 function() { });
assetAssemblerA.on('log',                 function(logMessage) { });
assetAssemblerA.on('result',              function(resultValue) { });
assetAssemblerA.on('file-download-pre',   function(remoteUrl) { });
assetAssemblerA.on('file-download-post',  function(localFile) { });
assetAssemblerA.on('file-read-pre',       function(localFile) { });
assetAssemblerA.on('file-read-post',      function(localFile) { });
assetAssemblerA.on('file-write-pre',      function(targetFile) { });
assetAssemblerA.on('file-write-post',     function(targetFile) { });

// Use build in event functions
assetAssemblerB.on('log',     assets.factory.assembler.event.log.console('css'));
assetAssemblerB.on('result',  assets.factory.assembler.event.result.objectSet(server,'includeCssFiles'));

// Run builder
assetAssemblerC.run(function(err) {
	//done
});

Example log output

First run with downloads and with DEBUG="*"

  ff:assets:assets-builder runAll started. +0ms
  ff:assets:assets-builder runAsset started for: css +1ms
  ff:assets:assets-builder runAsset started for: js +0ms
  ff:assets:assets-builder assemblerCreate from default +2ms
  ff:assets:assets-builder assemblerFill from default +0ms
  ff:assets:assets-builder runAssembler type: css +0ms
node-ff-assets:css build begin for: /static/css/lib/assets.css
  ff:assets:asset-assembler downloadList size: 0 +4ms
  ff:assets:asset-assembler readFileList size: 5 +1ms
  ff:assets:asset-assembler readFile: node_modules/bootstrap/dist/css/bootstrap.css size: 129940 +4ms
  ff:assets:asset-assembler readFile: www_static/css/boot.css size: 1824 +1ms
  ff:assets:asset-assembler readFile: www_static/css/flot.css size: 94 +0ms
  ff:assets:asset-assembler readFile: www_static/css/panel.css size: 605 +1ms
  ff:assets:asset-assembler readFile: www_static/css/style.css size: 448 +0ms
  ff:assets:asset-assembler target file: www_static/css/lib/assets.css +0ms
  ff:assets:asset-assembler target size: 133244 +0ms
node-ff-assets:css build result size: 1 from: 5
node-ff-assets:css build done in: 10 ms.
  ff:assets:assets-builder assemblerCreate from default +1ms
  ff:assets:assets-builder assemblerFill from default +0ms
  ff:assets:assets-builder runAssembler type: js +0ms
node-ff-assets:js build begin for: /static/js/lib/assets.js
  ff:assets:asset-assembler downloadList size: 5 +1ms
  ff:assets:asset-assembler readFileList size: 13 +0ms
  ff:assets:asset-assembler downloadFile: http://code.jquery.com/jquery-2.1.3.js +0ms
  ff:assets:asset-assembler downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular.js +90ms
  ff:assets:asset-assembler downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular-route.js +2s
  ff:assets:asset-assembler downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular-resource.js +579ms
  ff:assets:asset-assembler downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular-touch.js +567ms
  ff:assets:asset-assembler readFile: www_static/js/lib/jquery-2.1.3/jquery.js size: 151917 +593ms
  ff:assets:asset-assembler readFile: node_modules/bootstrap/dist/js/bootstrap.js size: 49199 +4ms
  ff:assets:asset-assembler readFile: node_modules/flot/jquery.flot.js size: 54509 +7ms
  ff:assets:asset-assembler readFile: node_modules/flot/jquery.flot.resize.js size: 1439 +1ms
  ff:assets:asset-assembler readFile: node_modules/flot/jquery.flot.pie.js size: 13451 +2ms
  ff:assets:asset-assembler readFile: www_static/js/lib/angularjs-1.4.0-b4/angular.js size: 297085 +61ms
  ff:assets:asset-assembler readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-route.js size: 8360 +5ms
  ff:assets:asset-assembler readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-resource.js size: 6847 +1ms
  ff:assets:asset-assembler readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-touch.js size: 7568 +2ms
  ff:assets:asset-assembler readFile: www_static/js/example-app.js size: 401 +0ms
  ff:assets:asset-assembler readFile: www_static/js/controller/page-bar.js size: 205 +0ms
  ff:assets:asset-assembler readFile: www_static/js/controller/page-foo.js size: 205 +0ms
  ff:assets:asset-assembler readFile: www_static/js/controller/page-index.js size: 207 +1ms
  ff:assets:asset-assembler target file: www_static/js/lib/assets.js +0ms
  ff:assets:asset-assembler target size: 592332 +0ms
node-ff-assets:js build result size: 1 from: 13
node-ff-assets:js build done in: 3502 ms.
Server assets done.
Server config done.
Server started on port 8080

Tests

npm test

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code.

Release History

0.2.5

Switched debug logging to debug library.
Removed events from AssetsBuilder.
Removed logLevel from log event in AssetAssembler.

0.2.4

Added json config reader.
Added readFileRegex data filter.
Added filename template to seperator.
Converted example to ejs.

0.2.2

Fixed error to callback
Fixed 404 error
Removed error event
Added log event to builder
Added builder tests
Made example jslint pass

0.2.1

Added example application
Fixed buid callback
Fixed buildOrder default
Updated doc

0.2.0

Redone objs
Added tests
Made jslint pass

0.1.x

Added objectAdd
Doc updates
Initial release