contributor-parser.php

<?php

$mappings = [
  'ryan.szrama' => 'rszrama',
  'damz' => 'Damien Tournoud',
  'damien' => 'Damien Tournoud',
  'pedro.cambra' => 'pcambra',
  'andy' => 'andyg5000',
  'nmd.matt' => 'mglaman',
  'amateescue' => 'amateescu',
  'torgospizza' => 'torgosPizza',
  'rszrama et al' => 'rszrama',
  'redben in http' => 'redben',
  'my.baileys' => 'mr.baileys',
  'GoZOo' => 'GoZ',
  'pasi.kauraniemi' => 'mitrpaka',
  'mikeNCM' => 'mlutz',
];
$projects = [
  'commerce' => [
    'repo' => 'https://git.drupal.org/project/commerce.git',
    'branch' => '8.x-2.x',
  ],
  'commerce_shipping' => [
    'repo' => 'https://git.drupal.org/project/commerce_shipping.git',
    'branch' => '8.x-2.x',
  ],
];
ensure_repos($projects);

$range = '--since="2017-01-01 00:00:00" --until="2017-12-31 23:59:59"';
foreach ($projects as $project_name => $project) {
  $contributors = [];
  $commits = [];
  exec('git -C projects/' . $project_name . ' log --format="%ae||%s" --no-merges ' . $range, $commits);  
  foreach ($commits as $key => $commit) {
    list($author, $subject) = explode("||", $commit);
    $matches = [];
    if (preg_match('/by (\w+\,?.*?):/', $subject, $matches)) {
      foreach (explode(', ', $matches[1]) as $user) {
        $user = isset($mappings[$user]) ? $mappings[$user] : $user;
        if (!isset($contributors[$user])) {
          $contributors[$user] = 0;
        }
        $contributors[$user] += 1;
      }
    }
    else {
      // The commit message isn't formatted with attribution.
      $author = explode('@', $author);
      $author = isset($mappings[$author[0]]) ? $mappings[$author[0]] : $author[0];
      if (!isset($contributors[$author])) {
        $contributors[$author] = 0;
      }
      $contributors[$author] += 1;
    }
  }

  unset($contributors['git']);
  arsort($contributors);
  print json_encode([
    'project' => $project_name . ' ' . $project['branch'],
    'total_contributors' => count($contributors),
    'total_commits' => count($commits),
    'contributors' => $contributors,
  ], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
}

function ensure_repos(array $projects) {
  if (!is_dir('projects')) {
    mkdir('projects');
  }

  foreach ($projects as $project_name => $project) {
    $project_path = 'projects/' . $project_name;
    if (is_dir($project_path)) {
      exec('git -C ' . $project_path . ' checkout ' . $project['branch']);
      exec('git -C ' . $project_path . ' pull origin ' . $project['branch']);
    }
    else {
      exec('git clone --branch ' . $project['branch'] . ' ' . $project['repo'] . ' ' . $project_path);
    }
  }
}