Github changelog generator

github_changelog_gen.php

#!/usr/bin/php
// This script accepts a repo, branch and a personal GH token and generates a changelog consisting of all merged pulls on said branch
// It requires PHP CLI with the cURL extension enabled.
// Best suited for projects where each release is created from a separate branch but might be useful for projects with other release schemes..

<?php
if ($argc<4){
    echo __FILE__ . ' <owner> <repo> <branch> <token> '."\n";
    exit (1);
}
$owner=$argv[1];
$repo=$argv[2];
$branch=$argv[3];
$token='';
if (isset($argv[4])){
   $token=$argv[4];
}

function was_merged($pull_number,$token)
{
    global $owner,$repo,$branch,$creds;
    $url=GITHUB_API_ENDPOINT."/repos/$owner/$repo/pulls/$pull_number/merge";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_setopt($ch, CURLOPT_USERAGENT,'changeloger');
    $authorization = "Authorization: Bearer ".$token; // Prepare the authorisation token
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json' , $authorization )); // Inject the token into the header
    curl_setopt($ch, CURLOPT_HEADER, 1);
    /*if (isset($creds)){
	curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
	curl_setopt($ch, CURLOPT_USERPWD, $creds);
    }*/
    curl_exec($ch);
    $result=curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    if ($result == 204){
	return true;
    }
    return false;

}
define('GITHUB_API_ENDPOINT', 'https://api.github.com');
$url=GITHUB_API_ENDPOINT."/repos/$owner/$repo/pulls?state=closed&base=$branch";
$page=1;
$out="# ChangeLog for $repo-$branch\n";
while (true){
    $url.="&page=$page";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_REFERER, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    //curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
    curl_setopt($ch,CURLOPT_USERAGENT,'changeloger');
    $authorization = "Authorization: Bearer ".$token; // Prepare the authorisation token
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json' , $authorization )); // Inject the token into the header
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = curl_exec($ch);
    curl_close($ch);
    $pull_array=json_decode($result);
    if (!is_array($pull_array)||empty($pull_array)){
	break;
    }
    foreach ($pull_array as $pull){
	if (was_merged($pull->number,$token)){
	    $out.='- ' . $pull->title .' ('.$pull->html_url.')'."\n";
	}
    }
    $page++;
}
$changelog_file="/tmp/$owner-$repo-$branch-CHANGELOG.md";
file_put_contents($changelog_file,$out);
echo "Changelog written to $changelog_file\n";