Zend_Tool CLI isn't respecting the ZF_TOOL_INCLUDE_PATH_PREPEND environment variable. Setup (using cygwin):

Environment:

$ env | grep ZF
ZF_CONFIG_FILE=C:\Users\guice\Documents\Sites\vhosts\cis.dev/.zf.ini
ZF_HOME=C:\Users\guice\Documents\Sites\vhosts\cis.dev
ZF_TOOL_INCLUDE_PATH_PREPEND=C:\Users\guice\Documents\Sites\vhosts\cis.dev\application

$ cat .zf.ini
basicloader.classes.1=Glacial_Tools_DbModel

$ zf --setup

ZF Command Line Tool - Setup
----------------------------

Current Paths (Existing or not):
    Home Directory: C:\Users\guice\Documents\Sites\vhosts\cis.dev
    Storage Directory: C:\Users\guice\Documents\Sites\vhosts\cis.dev/.zf/
    Config File: C:\Users\guice\Documents\Sites\vhosts\cis.dev/.zf.ini
...

$ ls -l $ZF_TOOL_INCLUDE_PATH_PREPEND/Glacial/Tools/
total 5.0K
-rw-r--r-- 1 guice Domain Users 1.5K Mar 27 09:09 DbModel.php
-rw-r--r-- 1 guice Domain Users  279 Mar 26 17:29 Manifest.php

Class File:

<?php
namespace Glacial\Tools 
{
    class DbModel extends \Zend_Tool_Project_Provider_Abstract
                  implements \Zend_Tool_Framework_Provider_Pretendable 
    {
        ...
    }
}

namespace
{
    class Glacial_Tools_DbModel extends \Glacial\Tools\DbModel
    {
        // Nothing to see here. This is a hack to make Zend_Tool a happy puppy.
    }
}

Running the command:

$ zf

Warning: include_once(Glacial\Tools\DbModel.php): failed to open stream: No such file or directory in C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Loader.php on line 146

Call Stack:
    0.0012     469992   1. {main}() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:0
    0.0012     469992   2. ZF::main() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:623
    0.0064     817752   3. ZF->run() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:74
    0.0064     817752   4. ZF->_runTool() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:117
    0.0078     907536   5. Zend_Tool_Framework_Client_Abstract->dispatch() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:600
    0.0078     907536   6. Zend_Tool_Framework_Client_Abstract->initialize() C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Tool\Framework\Client\Abstract.php:223
    0.0274    2052672   7. Zend_Tool_Framework_Loader_BasicLoader->load() C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Tool\Framework\Client\Abstract.php:122
    0.0563    3313544   8. Zend_Loader::loadClass() C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Tool\Framework\Loader\BasicLoader.php:110
    0.0563    3313856   9. Zend_Loader::loadFile() C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Loader.php:94


Fatal error: Uncaught exception 'Zend_Exception' with message 'File "Glacial\Tools\DbModel.php" does not exist or class "Glacial_Tools_DbModel" was not found in the file' in C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Loader.php on line 99

Zend_Exception: File "Glacial\Tools\DbModel.php" does not exist or class "Glacial_Tools_DbModel" was not found in the file in C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Loader.php on line 99

Call Stack:
    0.0012     469992   1. {main}() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:0
    0.0012     469992   2. ZF::main() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:623
    0.0064     817752   3. ZF->run() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:74
    0.0064     817752   4. ZF->_runTool() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:117
    0.0078     907536   5. Zend_Tool_Framework_Client_Abstract->dispatch() C:\Users\guice\Documents\Sites\vhosts\cis.dev\bin\zf.php:600
    0.0078     907536   6. Zend_Tool_Framework_Client_Abstract->initialize() C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Tool\Framework\Client\Abstract.php:223
    0.0274    2052672   7. Zend_Tool_Framework_Loader_BasicLoader->load() C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Tool\Framework\Client\Abstract.php:122
    0.0563    3313544   8. Zend_Loader::loadClass() C:\Users\guice\Documents\Sites\library\cis.externals\php\Zend\Tool\Framework\Loader\BasicLoader.php:110

Pretty clear ZF_TOOL_INCLUDE_PATH_PREPEND isn't being prepended to the path. I've searched the library code base and found no instances of ZF_TOOL_INCLUDE_PATH_PREPEND other than the "help" documents and comments (but is it possible it's buried somewhere else ... maybe).