Mon Jul 25 04:41:00 UTC 2005  Alberto Bertogli <albertogli@telpin.com.ar>
  * Skip showing the tree link if there is no pristine tree.
  If the repository was get with the --no-pristine-tree option, there won't be a
  current directory; we only show the tree option if the directory is there.
  
  The other related option that accesses the pristine tree directly is the
  headblob, but there is already a check in place that takes care of it.
  
  Thanks to Stephane Popinet for reporting it.
diff -rN -u old-darcsweb/darcsweb.cgi new-darcsweb/darcsweb.cgi
--- old-darcsweb/darcsweb.cgi	2016-01-28 16:02:44.000000000 +0000
+++ new-darcsweb/darcsweb.cgi	2016-01-28 16:02:44.000000000 +0000
@@ -245,9 +245,14 @@
 <a href="%(myreponame)s;a=summary">summary</a>
 | <a href="%(myreponame)s;a=shortlog">shortlog</a>
 | <a href="%(myreponame)s;a=log">log</a>
-| <a href="%(myreponame)s;a=tree">tree</a>
 	""" % { "myreponame": config.myreponame }
 
+	if os.path.isdir(config.repodir + '/_darcs/current/'):
+		# the current directory is missing if the --no-pristine-tree
+		# option was used in darcs get, so we only show the link if
+		# the directory exists
+		print '| <a href="%s;a=tree">tree</a>' % config.myreponame
+
 	if h:
 		print """
 | <a href="%(myreponame)s;a=commit;h=%(hash)s">commit</a>