Pre-commit SVN script to run unit tests

UnitTestsOnCheckin.php

#!/usr/local/bin/php
<?php
/**
 * Pre-commit Subversion script that runs unit tests.
 * @author Omni Adams <omni@digitaldarkness.com>
 * @copyright 2010 Digital Darkness
 */


/**
 * Path to the ant binary.
 */
define('ANT', '/usr/bin/ant');

/**
 * Path to the patch binary.
 */
define('PATCH', '/usr/bin/patch');

/**
 * Path to the php binary.
 */
define('PHP', '/usr/local/bin/php');

/**
 * Path to the svn binary.
 */
define('SVN', '/usr/bin/svn');

/**
 * Path to svnlook binary.
 */
define('SVNLOOK', '/usr/bin/svnlook');

/**
 * Divider to inject into error messages.
 */
define('DIVIDER',
'********************************************************************************');


/**
 * Run unit tests for the repository.
 *
 * If any unit tests fail, write the failure information
 * to standard error and return true.
 * @param string $transaction SVN transaction ID.
 * @param string $repository Full path to the repository.
 * @return boolen True if there was an error.
 */
function runUnitTests($transaction, $repository) {
    // Check out the latest from the repository into a
    // temporary directory.
    $fullRepoUrl = 'file:///' . $repository . '/trunk';
    $workingDirectory = '/tmp/svn-precommit/'
        . $transaction;
    mkdir($workingDirectory, 0700, true);
    exec(SVN . ' co "' . $fullRepoUrl . '" '
        . $workingDirectory);

    // Pull a patch of files changed from the transaction.
    $diffCommand = SVNLOOK . ' diff -t "' . $transaction
        . '" "' . $repository . '"';
    $diffOutput = array();
    exec($diffCommand, $diffOutput);
    $diff = implode(PHP_EOL, $diffOutput);
    file_put_contents($workingDirectory . '/patch',
        $diff);

    // Apply the patch to a fresh copy of the repository.
    chdir($workingDirectory);
    exec(PATCH . ' < ' . $workingDirectory . '/patch');

    // Run the test target.
    $output = array();
    exec(ANT . ' test 2> /dev/null', $output);

    $output = implode(PHP_EOL, $output);
    if (false === strpos($output, 'FAILURES')) {
        // Build passed!
        return false;
    }

    // Clean up the output a little bit before displaying
    // it to the user.
    $output = str_replace(array(' [exec]',
        $workingDirectory), '', $output);
    $output = PHP_EOL . DIVIDER . PHP_EOL . PHP_EOL
        . 'Unit tests failed. Fix the unit tests before '
        . 'submitting.' . PHP_EOL . PHP_EOL . $output;
    file_put_contents('php://stderr', $output);
    return true;
}


$repository = $_SERVER['argv'][1];
$transaction = $_SERVER['argv'][2];
if (runUnitTests($transaction, $repository)) {
    exit(1);
}

exit(0);