GitHubの特定ファイルのHistoryをRSS形式で出力するPHPスクリプト。PHPが動く適当なWebサーバーに置いてRSSとして購読して使う。

rpi-conformity.php

<?php
$title = "History for documentation/hardware/raspberrypi/conformity.md";
$url = "https://github.com/raspberrypi/documentation/commits/master/hardware/raspberrypi/conformity.md";
$description = $title;
$link_prefix = "https://github.com";

$html = file_get_contents($url);
$doc = new DOMDocument();
$doc->loadHTML($html);
$finder = new DomXPath($doc);

$out = "";
$commit = $finder->query("//*[contains(concat(' ', normalize-space(@class), ' '), ' commit ')]");

foreach($commit as $item) {
  $t = $item->getElementsByTagName('a')[0]->textContent;
  $a = $item->getElementsByTagName('a')[2]->textContent;
  $l = $link_prefix . $item->getElementsByTagName('a')[0]->getAttribute('href');
  $d = date('r', strtotime($item->getElementsByTagName('relative-time')[0]->getAttribute('datetime')));
  $out .= "  <item><title>" . $t . "</title><link>" . $l . "</link><description>" . $a . "</description><pubDate>" . $d . "</pubDate></item>\n";
}
$out = '<?xml version="1.0" encoding="UTF-8" ?><rss version="2.0"><channel><title>' . $title . "</title><link>" . $url . "</link><description>" . $description . "</description><language>en</language>\n" . $out;
$out .= "</channel></rss>";

header('Content-Type: application/xml');
print($out);