Gitlab -> Jenkins

00-README.md

Installation

• Set JENKINS_USER and JENKINS_TOKEN environment variables

• Edit mappings.json and add a push hook in Gitlab to http://localhost:5678/push.php

  OR

  Simply add a push hook in gitlab to http://localhost:5678/push.php?project=Jenkins+Project&token=ABCDEF

• Start the server with php -s 0.0.0.0:5678

mappings.json

{
  "gitlab_project": "Jenkins Project:token",
  "gitlab_project:refs/heads/live": "Jenkins Project - Live:token"
}

push.php

<?php

define('JENKINS_URL', empty(getenv('JENKINS_URL')) ? 'http://127.0.0.1:8080' : getenv('JENKINS_URL'));
define('JENKINS_USER', getenv('JENKINS_USER'));
define('JENKINS_TOKEN', getenv('JENKINS_TOKEN'));

$data = file_get_contents('php://input');
$mappings = json_decode(file_get_contents('mappings.json'));

if (strlen($data) === 0) {
  exit('No POST body.');
}

$json = json_decode($data);
$project_name = $json->repository->name;
$ref = $json->ref;
$project_and_ref = "{$project_name}:{$ref}";

if (!empty($_GET['token']) && !empty($_GET['project'])) {
  trigger_jenkins_build($_GET['project'], $_GET['token']);
  return;
}

if (array_key_exists($project_name, $mappings)) {
  $pair = split_project_and_key($mappings[$project_name]);
  trigger_jenkins_build($pair[0], $pair[1]);
}

if (array_key_exists($project_and_ref, $mappings)) {
  $pair = split_project_and_key($mappings[$project_and_ref]);
  trigger_jenkins_build($pair[0], $pair[1]);
}

function split_project_and_key($haystack) {
  $pos = strrpos($haystack, ':');
  $jenkins_project = substr($haystack, 0, $pos);
  $jenkins_token = substr($haystack, $pos + 1);

  return array($jenkins_project, $jenkins_token);
}

function trigger_jenkins_build($project, $token) {
  global $json;
  
  $ch = curl_init();
  $user_name = $json->user_name;

  $project_encoded = rawurlencode($project);
  $cause_encoded = rawurlencode("Git Push from {$user_name}");
  $url = JENKINS_URL . "/job/{$project_encoded}/build?token={$token}&cause={$cause_encoded}";

  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_HEADER, false);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
  curl_setopt($ch, CURLOPT_USERPWD, JENKINS_USER . ':' . JENKINS_TOKEN); 

  $buffer = curl_exec($ch); 
  curl_close($ch); 

  return $buffer;
}

?>