@c  This document is part of the ease.js manual
@c  Copyright (c) 2011 Mike Gerwitz
@c    Permission is granted to copy, distribute and/or modify this document
@c    under the terms of the GNU Free Documentation License, Version 1.3
@c    or any later version published by the Free Software Foundation;
@c    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
@c    Texts.  A copy of the license is included in the section entitled ``GNU
@c    Free Documentation License''.

@node Source Tree
@appendix Source Tree
You should already have gotten a hold of the source tree
(@pxref{Getting ease.js}). If not, please do so first and feel free to follow
along.

@example
  $ cd easejs
  $ ls -d */
  doc/  lib/  test/  tools/
@end example

The project contains four main directories in addition to the root directory:

@table @file
@item ./
The root directory contains basic project files, such as @file{README},
@file{Makefile} and @file{index.js}.

@item doc/
Contains documentation source files (you are currently reading part of it - the
manual).

@item lib/
Contains the actual source code for the various modules.

@item test/
Contains unit and performance tests.

@item tools/
Various tools used during build process.
@end table

Let's take a look at each directory in more detail.

@menu
* Root Directory::   Contains basic project files
* Doc Directory::    Contains source documentation files (manual)
* Lib Directory::    Contains project source files (modules)
* Test Directory::   Contains unit and performance tests
* Tools Directory::  Contains build tools
@end menu

@node Root Directory
@section Root Directory
The root directory contains basic project files for common operations.

@table @file
@item index.js
This file is loaded automatically when @samp{require( 'easejs' )} is used.

@item LICENSE
Contains the project license.

@item Makefile
Invoked by the @command{make} command. Used for building ease.js.

@item package.json
Used by @command{npm}, a package manager for Node.js, to automate installation.

@item README.md
Serves as a quick reference for the project, in markdown@footnote{See
@uref{http://en.wikipedia.org/wiki/Markdown}.} format. This format was chosen
because it is displayed nicely on GitHub.

@item TODO
Incomplete tasks. Future direction of the project. If you're looking to help
out, take a look at this file to see what needs to be done.
@end table

These files will be discussed in further detail when they are actually used.


@node Doc Directory
@section Doc Directory
The @file{doc/} directory contains the source files for the manual. The source
files are in Texinfo@footnote{See @uref{http://www.gnu.org/software/texinfo/}.}
format. Instructions for compiling the documentation are included later in this
chapter.

API documentation is @emph{not} included in this directory. It is generated from
the source code.


@node Lib Directory
@section Lib Directory
The @file{lib/} directory contains the source code for the project. Each source
file represents a single CommonJS module and is written in JavaScript.

@table @file
@item class.js
The main Class module. This contains all the functionality necessary to declare
and extend classes, implement interfaces, etc. This is the bulk of ease.js.

@item interface.js
Allows declaration and extension of Interfaces.

@item member_builder.js
Responsible for building class members.

@item propobj.js
Builds the internal property instance object that is passed around to methods of
specific class instances. This is the magic behind visibility support, and
therefore encapsulation.

@item prop_parser.js
Parses property strings. Note that the name refers to JavaScript properties,
which are any members of an object. Therefore, this module works on all members.

@item util.js
General utility functions for property parsing, object cloning, browser
fallbacks, etc.
@end table

Unless you are developing for ease.js, you needn't concern yourself with these
files. @file{index.js}, in the root directory, contains mappings to these files
where necessary, exposing the useful portions of the API for general use. You
can use ease.js without even recognizing that the @file{lib/} directory even
exists.


@node Test Directory
@section Test Directory
The @file{test/} directory contains all the unit tests for the project. ease.js
follows a test-driven development model. Every single aspect of the framework is
tested to ensure that features work as intended both server-side and across all
supported web browsers. The tests also ensure that bugs are not introduced for
anything that has been covered. This should also give outside developers
confidence. If a developer makes a modification to ease.js and does not cause
any failing tests, it's likely that their change didn't have negative
consequences on the integrity of the framework.

All tests are prefixed with @samp{test-}, followed by the name of the module,
followed optionally by the specific part of the module that is being tested. The
tests are written in JavaScript and use Node.js's @file{assert} module. They may
be run individually or at once during the build process.

In addition, there exists a @file{test/perf/} directory that contains
performance tests used for benchmarking.


@node Tools Directory
@section Tools Directory
The @file{tools/} directory contains scripts and data necessary for the build
process. The tools are shell scripts that may be run independently of the build
process if you find them to be useful. The remaining files are data to accompany
those tools.

@table @file
@item combine
Concatenates all the modules and wraps them for client-side deployment. If
requested, the tests are also wrapped and concatenated so that they may be run
in the web browser. The contents are stripped of trailing commas using the
@command{rmtrail} tool. The resulting file is @emph{not} minified; the user can
use whatever process he/she wishes to do so. In the future, minification will be
part of the build script.

@item rmtrail
Removes trailing commas from object and array definitions. Reads from standard
in. @emph{This script is not intelligent.} It was designed to work with ease.js.
It does not, for example, check to ensure that it is not removing commas from
within strings. This would not be a difficult addition, but is currently
unnecessary. Use caution when using this tool outside of ease.js.

@item minify.js
Responsible for receiving input from stdin and writing minified output to
stdout. This script uses UglifyJS to minify source files for distribution,
improving download times.

@item browser-test.html
Skeleton page to be used after the build process. Runs ease.js unit tests in the
web browser and reports any failures. This is very important to ensure that
ease.js operates consistently between all supported browsers. The tests that are
run are the same exact tests that are run server-side.

@item combine-test.tpl
Contains a client-side implementation of any modules required for testing. This
file contains mainly assertions. It is included by the @command{combine} script
when tests are requested.

@item combine.tpl
Contains the basic functionality required to get CommonJS modules working
client-side. This is a very basic implementation, only doing what is necessary
for ease.js to work properly. It is not meant to be a solution for all of your
client-side CommonJS problems.

@item license.tpl
Contains the license that is to appear atop every combined file, including
minified. The original text must remain in tact. If you make changes to the
source code, you are welcome to add additional text. See the @file{LICENSE} file
in the root directory for more information on what is permitted.
@end table

While the tools may be useful outside of ease.js in some regard, please note
that they have been tailored especially for ease.js. They do not contain
unnecessary features that ease.js does not need to make use of. Therefore, you
may need to adapt them to your own project and individual needs should you
decide to use them in your own projects.