add experimental self-updating script

diff --git a/include/functions.php b/include/functions.php
index 957146f1f77ec3827195170d902f6655688539eb..69b481ac46c5c46b192722d34b10e891c5f6e341 100644 (file)
--- a/include/functions.php
+++ b/include/functions.php
@@ -5506,4 +5506,18 @@
 
                return null;
        }
+
+       function tmpdirname($path, $prefix) {
+               // Use PHP's tmpfile function to create a temporary
+               // directory name. Delete the file and keep the name.
+               $tempname = tempnam($path,$prefix);
+               if (!$tempname)
+                       return false;
+
+               if (!unlink($tempname))
+                       return false;
+
+       return $tempname;
+       }
+
 ?>

diff --git a/update.php b/update.php
index 292b5c1be12a9c2b52961fce00b3ca80d8d4948b..f23244d84625538cf8e6abc76bcf99a42124593e 100755 (executable)
--- a/update.php
+++ b/update.php
@@ -28,6 +28,7 @@
                print "  -cleanup-tags       - perform tags table maintenance\n";
                print "  -get-feeds          - receive popular feeds from linked instances\n";
                print "  -import USER FILE   - import articles from XML\n";
+               print "  -update-self        - update tt-rss installation to latest version\n";
                print "  -quiet              - don't show messages\n";
                print "  -indexes            - recreate missing schema indexes\n";
                print "  -help               - show this help\n";
@@ -205,11 +206,179 @@
                _debug("all done.");
        }
 
+       if (in_array("-update-self", $op)) {
+               _debug("Warning: self-updating is experimental. Use at your own risk.");
+               _debug("Please backup your tt-rss directory before continuing. Your database will not be modified.");
+               _debug("Type 'yes' to continue.");
+
+               if (read_stdin() != 'yes')
+                       exit;
+
+               $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 && !in_array("-force", $op)) {
+                       _debug("You are on latest version. Update not needed.");
+                       exit;
+               }
+               if (file_exists($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 current directory to ".basename($old_dir));
+               if (!rename($work_dir, $old_dir)) {
+                       _debug("Unable to rename current 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 $old_dir. ".
+                       "Please migrate locally modified files (if any) and remove it.");
+               _debug("You might need to re-enter current directory in shell to see new files.");
+       }
+
        db_close($link);
 
        if ($lock_handle != false) {
                fclose($lock_handle);
        }
 
-       unlink(LOCK_DIRECTORY . "/$lock_filename");
+       if (file_exists(LOCK_DIRECTORY . "/$lock_filename"))
+               unlink(LOCK_DIRECTORY . "/$lock_filename");
 ?>