028cc4b4e9679a5e38994fa2221cb73e88aa6616
galt
  Thu Jan 24 19:02:04 2013 -0800
set udc cache location early before cart and doMiddle if possible.  Restoring saved sessions with bigDataUrl custom tracks was leaking to /tmp/udcCache instead of correct CGI location under trash.
diff --git src/hg/hgTracks/renderMain.c src/hg/hgTracks/renderMain.c
index e89c5b2..7a557e5 100644
--- src/hg/hgTracks/renderMain.c
+++ src/hg/hgTracks/renderMain.c
@@ -94,30 +94,31 @@
     track->loadItems(track);
     }
 verboseTime(2, "After load");
 
 /* Initialize global image box. */
 int sideSliceWidth  = 0;   // Just being explicit
 if (withLeftLabels)
     sideSliceWidth   = (insideX - gfxBorder*3) + 2;
 theImgBox = imgBoxStart(database,chromName,winStart,winEnd,(!revCmplDisp),sideSliceWidth,tl.picWidth);
 makeActiveImage(trackList, NULL);
 verboseTime(2,"After makeActiveImage");
 }
 
 int main(int argc, char *argv[])
 {
+setUdcCacheDir(); /* early is helpful for hgTracks */
 if(argc == 1)
     {
     long enteredMainTime = clock1000();
     // CGI call
 
     // htmlPushEarlyHandlers(); XXXX do I need to do this?
 
     hPrintDisable();
     oldVars = hashNew(10);
     struct cart *cart = cartForSession(hUserCookie(), excludeVars, oldVars);
 
     // setup approriate CGI variables which tell hgTracks code what to do.
     cartSetBoolean(cart, "hgt.trackImgOnly", TRUE);
     if(cartVarExists(cart, "jsonp"))
         {