<?php

$fp = fopen("/root/commits.txt", "r");

$commits = array();
$previous_author = '';
while (($line = fgets($fp)) !== FALSE) {
    list($mode, $sha, $current_author, $subject) = explode('|', $line);
    if ($previous_author == '' || $previous_author !== $current_author) {
        $previous_author = $current_author;
    } else {
        $mode = 'f';
    }
    $output[] = implode(' ', array($mode, $sha, $subject));
}

fclose($fp);

print implode(' ', $output);
