DiffusionGitCommandEngine.php
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	<?php

	final class DiffusionGitCommandEngine
	extends DiffusionCommandEngine {

	protected function canBuildForRepository(
	PhabricatorRepository $repository) {
	return $repository->isGit();
	}

	protected function newFormattedCommand($pattern, array $argv) {
	$pattern = "git {$pattern}";
	return array($pattern, $argv);
	}

	protected function newCustomEnvironment() {
	$env = array();

	// NOTE: See T2965. Some time after Git 1.7.5.4, Git started fataling if
	// it can not read $HOME. For many users, $HOME points at /root (this
	// seems to be a default result of Apache setup). Instead, explicitly
	// point $HOME at a readable, empty directory so that Git looks for the
	// config file it's after, fails to locate it, and moves on. This is
	// really silly, but seems like the least damaging approach to
	// mitigating the issue.

	$env['HOME'] = PhabricatorEnv::getEmptyCWD();

	if ($this->isAnySSHProtocol()) {
	$env['GIT_SSH'] = $this->getSSHWrapper();
	}

	return $env;
	}

	}