CakePHP2をComposerでサクッとセットアップする ref: http://qiita.com/ikuwow/items/748613ba234415cc7b0b

.gitignore

/vendors
/plugins

/app/tmp/*
/app/Config/core.php
/app/Config/database.php

bootstrap.php

CakePlugin::loadAll();

composer.json

{
    "name": "example-app",
    "repositories": [
        {
            "type": "pear",
            "url": "http://pear.cakephp.org"
        }
    ],
    "require": {
        "cakephp/cakephp": ">=2.6.4,<3.0.0"
    },
    "require-dev": {
        "phpunit/phpunit": "3.7.37",
        "cakephp/debug_kit" : ">=2.2.4,<3.0.0"
    },
    "config": {
        "vendor-dir": "vendors/"
    },
    "extra": {
        "installer-paths": {
            "./plugins/{$name}/": [
                "cakephp/debug_kit"
            ]
        }
    }
}

file0.txt

$ mkdir cakephpapp/ # アプリのディレクトリ作成

file2.txt

$ vendors/bin/cake bake project app

Welcome to CakePHP v2.6.4 Console
---------------------------------------------------------------
App : testcakephp2
Path: /Users/degawaikuo/workspace/testcakephp2/
---------------------------------------------------------------
Skel Directory: /Users/degawaikuo/workspace/testcakephp2/vendors/cakephp/cakephp/lib/Cake/Console/Templates/skel
Will be copied to: /Users/degawaikuo/workspace/testcakephp2/app
---------------------------------------------------------------
Look okay? (y/n/q)
[y] > y
---------------------------------------------------------------
Created: app in /Users/degawaikuo/workspace/testcakephp2/app
---------------------------------------------------------------
 * Random hash key created for 'Security.salt'
 * Random seed created for 'Security.cipherSeed'
 * Cache prefix set
 * app/Console/cake.php path set.
CakePHP is not on your `include_path`, CAKE_CORE_INCLUDE_PATH will be hard coded.
You can fix this by adding CakePHP to your `include_path`.
 * CAKE_CORE_INCLUDE_PATH set to /Users/degawaikuo/workspace/testcakephp2/vendors/cakephp/cakephp/lib in webroot/index.php
 * CAKE_CORE_INCLUDE_PATH set to /Users/degawaikuo/workspace/testcakephp2/vendors/cakephp/cakephp/lib in webroot/test.php
   * Remember to check these values after moving to production server
Project baked successfully!

file3.txt

$ cd app/webroot
$ php -S localhost:8989

file7.txt

$ git init
$ git add .
$ git commit -m'initial commit'

index.phpとtest.phpの55行目あたり

// これを
// define('CAKE_CORE_INCLUDE_PATH',  DS . 'Users' . DS . 'username'. DS . 'testcakephp2' . DS . 'vendors' . DS . 'cakephp' . DS . 'cakephp' . DS . 'lib');

// こうする
define('CAKE_CORE_INCLUDE_PATH',  ROOT. DS . 'vendors' . DS . 'cakephp' . DS . 'cakephp' . DS . 'lib');