From acf33893ab44d684642accc705cf465a92c3f3f5 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@madoka.volgo-balt.ru>
Date: Thu, 23 Aug 2012 13:57:29 +0400
Subject: move self-updating to include/update_self.php

---
 include/update_self.php | 161 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 include/update_self.php

(limited to 'include/update_self.php')

diff --git a/include/update_self.php b/include/update_self.php
new file mode 100644
index 000000000..e33fe4bfa
--- /dev/null
+++ b/include/update_self.php
@@ -0,0 +1,161 @@
+<?php
+	function update_self($link, $force = false) {
+		$work_dir = dirname(__FILE__);
+		$parent_dir = dirname($work_dir);
+
+		if (!is_writable($work_dir) && !is_writable("$parent_dir")) {
+			_debug("Both current and parent directories should be writable as current user.");
+			exit;
+		}
+
+		if (!is_writable(sys_get_temp_dir())) {
+			_debug("System temporary directory should be writable as current user.");
+			exit;
+		}
+
+		_debug("Checking for tar...");
+
+		$system_rc = 0;
+		system("tar --version >/dev/null", $system_rc);
+
+		if ($system_rc != 0) {
+			_debug("Could not run tar executable (RC=$system_rc).");
+			exit;
+		}
+
+		_debug("Checking for latest version...");
+
+		$version_info = json_decode(fetch_file_contents("http://tt-rss.org/version.php"),
+			true);
+
+		if (!is_array($version_info)) {
+			_debug("Unable to fetch version information.");
+			exit;
+		}
+
+		$target_version = $version_info["version"];
+		$target_dir = "$parent_dir/tt-rss-$target_version";
+
+		_debug("Target version: $target_version");
+
+		if (version_compare(VERSION, $target_version) != -1 && !$force) {
+			_debug("You are on the latest version. Update not needed.");
+			exit;
+		}
+		if (file_exists($target_dir)) {
+			_debug("Target directory $target_dir already exists.");
+			exit;
+		}
+
+		_debug("Downloading checksums...");
+		$md5sum_data = fetch_file_contents("http://tt-rss.org/download/md5sum.txt");
+
+		if (!$md5sum_data) {
+			_debug("Could not download checksums.");
+			exit;
+		}
+
+		$md5sum_data = explode("\n", $md5sum_data);
+
+		$tarball_url = "http://tt-rss.org/download/tt-rss-$target_version.tar.gz";
+		$data = fetch_file_contents($tarball_url);
+
+		if (!$data) {
+			_debug("Could not download distribution tarball ($tarball_url).");
+			exit;
+		}
+
+		_debug("Verifying tarball checksum...");
+
+		$target_md5sum = false;
+
+		foreach ($md5sum_data as $line) {
+			$pair = explode("  ", $line);
+
+			if ($pair[1] == "tt-rss-$target_version.tar.gz") {
+				$target_md5sum = $pair[0];
+				break;
+			}
+		}
+
+		if (!$target_md5sum) {
+			_debug("Unable to locate checksum for target version.");
+			exit;
+		}
+
+		$test_md5sum = md5($data);
+
+		if ($test_md5sum != $target_md5sum) {
+			_debug("Downloaded checksum doesn't match (got $test_md5sum, expected $target_md5sum).");
+			exit;
+		}
+
+		$tmp_file = tempnam(sys_get_temp_dir(), 'tt-rss');
+		_debug("Saving download to $tmp_file");
+
+		if (!file_put_contents($tmp_file, $data)) {
+			_debug("Unable to save download.");
+			exit;
+		}
+
+		if (!chdir($parent_dir)) {
+			_debug("Unable to change into parent directory.");
+			exit;
+		}
+
+		$old_dir = tmpdirname($parent_dir, "tt-rss-old");
+
+		_debug("Renaming tt-rss directory to ".basename($old_dir));
+		if (!rename($work_dir, $old_dir)) {
+			_debug("Unable to rename tt-rss directory.");
+			exit;
+		}
+
+		_debug("Extracting tarball...");
+		system("tar zxf $tmp_file", $system_rc);
+
+		if ($system_rc != 0) {
+			_debug("Error while extracting tarball (RC=$system_rc).");
+			exit;
+		}
+
+		_debug("Renaming target directory...");
+		if (!rename($target_dir, $work_dir)) {
+			_debug("Unable to rename target directory.");
+			exit;
+		}
+
+		chdir($work_dir);
+
+		_debug("Copying config.php...");
+		if (!copy("$old_dir/config.php", "$work_dir/config.php")) {
+			_debug("Unable to copy config.php to $work_dir.");
+			exit;
+		}
+
+		_debug("Cleaning up...");
+		unlink($tmp_file);
+
+		_debug("Fixing permissions...");
+
+		$directories = array(
+			CACHE_DIR,
+			CACHE_DIR . "/htmlpurifier",
+			CACHE_DIR . "/export",
+			CACHE_DIR . "/images",
+			CACHE_DIR . "/magpie",
+			CACHE_DIR . "/simplepie",
+			ICONS_DIR,
+			LOCK_DIRECTORY);
+
+		foreach ($directories as $dir) {
+			_debug("-> $dir");
+			chmod($dir, 0777);
+		}
+
+		_debug("Upgrade completed.");
+		_debug("Your old tt-rss directory is saved at $old_dir. ".
+			"Please migrate locally modified files (if any) and remove it.");
+		_debug("You might need to re-enter current directory in shell to see new files.");
+	}
+?>
-- 
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