Tutorial for writing a PHP deployment script

request_path

// Edit this string to reflect on the default location of vhost web roots
// do include the trailing slash
// Example: $default_parent_path = '/var/www/vhosts/';
$default_parent_path = '/var/www/vhosts/';

// The name of the public_html directory
// do include the leading slash
// do not include the trailing slash
// Example: $default_public_directory = '/public';
$default_public_directory = '/public';

// Specify which branch by appending a branch name variable 'bn' to the end of the url
// defaults to 'master' if none specified
// Example: http://post-receive.mysrv.com/mywebsite.mysrv.com?bn=develop
$default_pull_branch_name = 'master';
if (empty($_GET['bn'])) {
  $pull_branch_name = $default_pull_branch_name;
}
else {
  $pull_branch_name = $_GET['bn'];
}

// The idea is if only 1 argument is present, treat that as the /var/www/vhosts/<directory_name>
// and if more than 1 argument is given, treat that as the full "cd-able" path
$args = explode('/', $path);

if (count($args) === 1) {
  $working_path = $default_parent_path . $path . $default_public_directory;
}
elseif (count($args) > 1) {
  $working_path = ‘/’ . $path;
}

pre

pre

node

  // Fetch and check version numbers from tags
  $preoutput = shell_exec("cd $working_path; git fetch origin; git fetch origin --tags; git tag");
  // Finds an array of major versions by reading a string of numbers that comes after '7.x-'
  preg_match_all('/(?<=(7\.x-))[0-9]+/', $preoutput, $matches_majver);
  // Finds the latest major version by taking the version number with the greatest numerical value
  $majver = max($matches_majver[0]);
  // Finds an array of minor versions by reading a string of numbers that comes after '7.x-{$majver}.'
  // where {$majver} is the latest major version number previously found above
  preg_match_all('/(?<=(7\.x-' . $majver . '.))[0-9]+/', $preoutput, $matches_minver);
  // Finds the latest minor version by taking the version number with the greatest numerical value
  $minver = max($matches_minver[0]);
  // Concaternate version numbers together to form the highest version tag
  $topver = '7.x-' . $majver . '.' . $minver;
  echo "<pre>The latest version detected is version $topver</pre>";

Twitter

request_path

if (empty($_GET['sk'])) {
  header('HTTP/1.1 400 Bad Request', true, 400);
  echo '<pre>No security key supplied</pre>';
  exit;
}
if ($_GET['sk']!='mysecuritykey') {
  header('HTTP/1.1 403 Forbidden', true, 403);
  echo '<pre>Wrong security key supplied</pre>';
  exit;
}

$default_pull_branch_name = 'master';
if (empty($_GET['bn'])) {
  $pull_branch_name = $default_pull_branch_name;
}
else {
  $pull_branch_name = $_GET['bn'];
}

$args = explode('/', $path);

if (count($args) === 1) {
  $working_path = $default_parent_path . $path . $default_public_directory;
}
elseif (count($args) > 1) {
  $working_path = ‘/’ . $path;
}

if (!empty($working_path) && file_exists($working_path)) {
  $preoutput = shell_exec("cd $working_path; git fetch origin; git fetch origin --tags; git tag");
  preg_match_all('/(?<=(7\.x-))[0-9]+/', $preoutput, $matches_majver);
  $majver = max($matches_majver[0]);
  preg_match_all('/(?<=(7\.x-' . $majver . '.))[0-9]+/', $preoutput, $matches_minver);
  $minver = max($matches_minver[0]);
  $topver = '7.x-' . $majver . '.' . $minver;
  echo "<pre>The latest version detected is version $topver</pre>";

  $output = shell_exec("cd $working_path; git fetch origin; git reset --hard; git checkout $pull_branch_name; git fetch origin $pull_branch_name; git merge tags/$topver;");
  echo "<pre>$output</pre>";
}

if (!empty($_GET['cc'])) {
  switch ($_GET['cc']) {
    case 'all':
      shell_exec("cd $working_path; drush cc all");
      break;
    case 'cssplusjs':
      shell_exec("cd $working_path; drush cc css+js");
      break;
    case 'cssminusjs':
      shell_exec("cd $working_path; drush cc css-js");
      break;
  }
}

if (!empty($_GET['up'])) {
  shell_exec("cd $working_path; drush updatedb -y");
}

if (!empty($_GET['fr'])) {
  shell_exec("cd $working_path; drush fra -y");
}

if (!empty($_POST) && !empty($_POST['payload'])) {
  $payload = json_decode($_POST['payload']);
  if (!empty($payload)) {
    $twitter = new Twitter($consumerKey, $consumerSecret, $accessToken, $accessTokenSecret);
    $last_commit = end($payload->commits);
    $twitter->send('[' . $payload->repository->name . ':' . $pull_branch_name . '] ' . count($payload->commits) . ' commit(s) deployed. Last commit: ' . end($payload->commits)->id . ' by ' . end($payload->commits)->author->name . end($payload->commits)->author->email);
  }
}

 /**
 * Returns the requested url path of the page being viewed.
 *
 * Example:
 * – http://example.com/node/306 returns "node/306".
 *
 * See request_path() in Drupal 7 core api for more details
 */
function request_path() {
  static $path;

  if (isset($path)) {
    return $path;
  }

  if (isset($_GET['q'])) {
    // This is a request with a ?q=foo/bar query string. $_GET['q'] is
    // overwritten in drupal_path_initialize(), but request_path() is called
    // very early in the bootstrap process, so the original value is saved in
    // $path and returned in later calls.
    $path = $_GET['q'];
  }
  elseif (isset($_SERVER['REQUEST_URI'])) {
    // This request is either a clean URL, or 'index.php', or nonsense.
    // Extract the path from REQUEST_URI.
    $request_path = strtok($_SERVER['REQUEST_URI'], '?');
    $base_path_len = strlen(rtrim(dirname($_SERVER['SCRIPT_NAME']), '\/'));
    // Unescape and strip $base_path prefix, leaving q without a leading slash.
    $path = substr(urldecode($request_path), $base_path_len + 1);
    // If the path equals the script filename, either because 'index.php' was
    // explicitly provided in the URL, or because the server added it to
    // $_SERVER['REQUEST_URI'] even when it wasn't provided in the URL (some
    // versions of Microsoft IIS do this), the front page should be served.
    if ($path == basename($_SERVER['PHP_SELF'])) {
      $path = '';
    }
  }
  else {
    // This is the front page.
    $path = '';
  }

  // Under certain conditions Apache's RewriteRule directive prepends the value
  // assigned to $_GET['q'] with a slash. Moreover we can always have a trailing
  // slash in place, hence we need to normalize $_GET['q'].
  $path = trim($path, '/');