Ticket #18201: 18201.2.diff

wp-admin/includes/update.php

@@ -59 +59 @@
         return $result;
 }
 
+function get_core_checksums( $version ) {
+        if ( $checksums = get_site_transient( "core_checksums_$version" ) )
+                return $checksums;
+
+        $url = 'http://api.wordpress.org/core/checksum/1.0/?' . http_build_query( array( 'version' => $version ), null, '&' );
+
+        if ( wp_http_supports( array( 'ssl' ) ) )
+                $url = set_url_scheme( $url, 'https' );
+
+        $options = array(
+                'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),
+                'user-agent' => 'WordPress/' . $version . '; ' . home_url( '/' )
+        );
+
+        $response = wp_remote_get( $url, $options );
+
+        if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )
+                return false;
+
+        $body = trim( wp_remote_retrieve_body( $response ) );
+        $body = json_decode( $body, true );
+
+        if ( ! is_array( $body ) || ! isset( $body['checksums'] ) || ! is_array( $body['checksums'] ) )
+                return false;
+
+        set_site_transient( "core_checksums_$version", $body['checksums'], HOUR_IN_SECONDS );
+
+        return $body['checksums'];
+}
+
 function dismiss_core_update( $update ) {
         $dismissed = get_site_option( 'dismissed_update_core' );
         $dismissed[ $update->current . '|' . $update->locale ] = true;

wp-admin/includes/class-wp-upgrader.php

@@ -1090 +1090 @@
 
                 $wp_dir = trailingslashit($wp_filesystem->abspath());
 
+                $no_partial = false;
+                if ( ! $this->check_files() )
+                        $no_partial = true;
+
                 // If partial update is returned from the API, use that, unless we're doing a reinstall.
                 // If we cross the new_bundled version number, then use the new_bundled zip.
                 // Don't though if the constant is set to skip bundled items.
                 // If the API returns a no_content zip, go with it. Finally, default to the full zip.
-                if ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version )
+                if ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version && ! $no_partial )
                         $to_download = 'partial';
                 elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
                         && ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) )
@@ -1129 +1133 @@
                 return $result;
         }
 
+        function check_files() {
+                global $wp_version;
+
+                if ( ! function_exists( 'md5_file' ) )
+                        return false;
+
+                $checksums = get_core_checksums( $wp_version );
+
+                if ( empty( $checksums ) )
+                        return false;
+
+                $home = get_home_path();
+
+                foreach ( $checksums as $file => $checksum ) {
+                        if ( md5_file( $home . $file ) !== $checksum )
+                                return false;
+                }
+
+                return true;
+        }
 }
 
 /**

wp-admin/includes/update-core.php

@@ -690 +690 @@
 
         apply_filters('update_feedback', __('Installing the latest version…'));
 
+        // Check to see which files don't really need updating
+        $skip = array( 'wp-content' );
+        if ( function_exists( 'md5_file' ) ) {
+                $checksums = get_core_checksums( $wp_version );
+                if ( ! empty( $checksums ) ) {
+                        foreach( $checksums as $file => $checksum ) {
+                                if ( md5_file( $to . $file ) === $checksum )
+                                        $skip[] = $file;
+                        }
+                }
+        }
+
         // Create maintenance file to signal that we are upgrading
         $maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
         $maintenance_file = $to . '.maintenance';
@@ -697 +709 @@
         $wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE);
 
         // Copy new versions of WP files into place.
-        $result = _copy_dir($from . $distro, $to, array('wp-content') );
+        $result = _copy_dir($from . $distro, $to, $skip );
 
         // Custom Content Directory needs updating now.
         // Copy Languages