3 files changed, 16 insertions, 5 deletions
diff --git a/lib/exe/indexer.php b/lib/exe/indexer.php
index f5fc07bc3..057ab06f1 100644
--- a/lib/exe/indexer.php
+++ b/lib/exe/indexer.php
@@ -13,6 +13,9 @@ require_once(DOKU_INC.'inc/events.php');
 session_write_close();  //close session
 if(!defined('NL')) define('NL',"\n");
 
+// Version tag used to force rebuild on upgrade
+define(INDEXER_VERSION, 1);
+
 // keep running after browser closes connection
 @ignore_user_abort(true);
 
@@ -136,10 +139,15 @@ function runIndexer(){
     if(!$ID) return false;
 
     // check if indexing needed
-    $last = @filemtime(metaFN($ID,'.indexed'));
-    if($last > @filemtime(wikiFN($ID))){
-        print "runIndexer(): index for $ID up to date".NL;
-        return false;
+    $idxtag = metaFN($ID,'.indexed');
+    if(@file_exists($idxtag)){
+        if(io_readFile($idxtag) >= INDEXER_VERSION){
+            $last = @filemtime($idxtag);
+            if($last > @filemtime(wikiFN($ID))){
+                print "runIndexer(): index for $ID up to date".NL;
+                return false;
+            }
+        }
     }
 
     // try to aquire a lock
@@ -163,7 +171,7 @@ function runIndexer(){
     idx_addPage($ID);
 
     // we're finished - save and free lock
-    io_saveFile(metaFN($ID,'.indexed'),' ');
+    io_saveFile(metaFN($ID,'.indexed'),INDEXER_VERSION);
     @rmdir($lock);
     print "runIndexer(): finished".NL;
     return true;
diff --git a/lib/plugins/config/lang/en/lang.php b/lib/plugins/config/lang/en/lang.php
index 526ac4a0e..24b8db147 100644
--- a/lib/plugins/config/lang/en/lang.php
+++ b/lib/plugins/config/lang/en/lang.php
@@ -180,3 +180,5 @@ $lang['compression_o_0']   = 'none';
 $lang['compression_o_gz']  = 'gzip';
 $lang['compression_o_bz2'] = 'bz2';
 
+/* FIXME: delete when no longer needed */
+$lang['test_indexer'] = 'New Indexer testing bitfield: 0x1 -> sorted searching';
diff --git a/lib/plugins/config/settings/config.metadata.php b/lib/plugins/config/settings/config.metadata.php
index 36b2be38b..44b121dfa 100644
--- a/lib/plugins/config/settings/config.metadata.php
+++ b/lib/plugins/config/settings/config.metadata.php
@@ -163,6 +163,7 @@ $meta['rss_type']    = array('multichoice','_choices' => array('rss','rss1','rss
 $meta['rss_linkto']  = array('multichoice','_choices' => array('diff','page','rev','current'));
 $meta['rss_update']  = array('numeric');
 $meta['recent_days'] = array('numeric');
+$meta['test_indexer'] = array('numeric'); // FIXME: delete when no longer needed
 
 $meta['_network']    = array('fieldset');
 $meta['proxy____host'] = array('string','_pattern' => '#^[a-z0-9\-\.+]+?#i');