Bitbucket Repository Push & Pull Webhook

push.php

<?php
/*
 *
 * This script manages webhooks from bitbucket.
 * In order to automatically deploy updated source code
 * without having to manually pull the repository.
 *
 * Bitbucket webhook will hit this script twice
 * each time a commit is pushed to the repository.
 * Once on production, and once on staging to
 * insure proper user permissions.
 *
 */

// Define paths to environments
define('DOCROOT_PATH', '/var/www/html');

// Define git binary path
define('GIT_BIN', '/usr/bin/git');

/**
 * Pull a repository using shell exec.
 * @param $directory
 * @param $branch
 * @return string
 */
function pullRepository($directory, $branch) {
    $command = 'cd ' . $directory . ' && ' . GIT_BIN . ' pull --rebase origin '. $branch . ' 2>&1 && echo $?';
    $result = shell_exec($command);
    return $result;
}

/**
 * Pull production repository using pullRepository()
 * @return string
 */
function updateRepository() {
    $result = pullRepository(DOCROOT_PATH, 'master');
    return $result;
}

/*
 * Begin logic to determine which repository to pull since this script
 * is hosted in the repository and the bitbucket webhook hits it twice
 * on both hosts lunginstitute.com and staging.lunginstitute.com
 */
$jsonBody = file_get_contents('php://input');
$data = json_decode($jsonBody, true);

$host = $_SERVER['HTTP_HOST'];
$user = get_current_user();

echo "Current user: $user \n";

$masterUpdate = false;
$stagingUpdate = false;

// grab changes pushed from bitbucket payload
$changes = $data['push']['changes']; // Branch name on new changes

echo "Number of changes: " . count($changes) . "\n";

// loop through changes to see if changes
// were pushed to master or staging branch
for ( $i = 0; $i < count($changes); $i++ ) {
    // if master and staging both already marked for update
    // break loop to save time
    if ($masterUpdate && $stagingUpdate) {
        echo "Master and staging both are flagged for update. \n";
        break;
    }

    $branchName = $changes[$i]['new']['name'];
    echo "Change found for branch: " . $branchName . "\n";
  
    // Determine which branches matter
    switch ($branchName) {
        case 'master':
            $masterUpdate = true;
            break;
    }
}

echo "Update master? ";
echo $masterUpdate ? "yes" : "no";
echo "\n";

// update master, if this is being run by production account
if ($masterUpdate) {
    echo "Pull repository. \n";
    echo updateRepository();
} else {
    echo "No changes found on master. \n";
}

echo "-- done -- \n";