# HG changeset patch
# User Alexander Plavin <alexander@plav.in>
# Date 1376074378 -14400
# Node ID 2f9d5c5256ea4db1b7c52a892b9e2e977ceb7af4
# Parent  d69e06724b96a985f29fd493a5dfe356a75af387
revset: add helper function to get revset parse tree depth

Will be used to determine if a hgweb search query actually uses
any revset syntax.

diff -r d69e06724b96 -r 2f9d5c5256ea mercurial/revset.py
--- a/mercurial/revset.py	Sat Sep 07 00:59:24 2013 -0700
+++ b/mercurial/revset.py	Fri Aug 09 22:52:58 2013 +0400
@@ -1935,5 +1935,11 @@
     output = '\n'.join(('  '*l + s) for l, s in lines)
     return output
 
+def depth(tree):
+    if isinstance(tree, tuple):
+        return max(map(depth, tree)) + 1
+    else:
+        return 0
+
 # tell hggettext to extract docstrings from these functions:
 i18nfunctions = symbols.values()