--- a/mercurial/parser.py Sun Apr 26 19:50:42 2015 +0900
+++ b/mercurial/parser.py Sun Apr 26 22:20:03 2015 +0900
@@ -93,3 +93,18 @@
if self._methods:
return self.eval(t)
return t
+
+def prettyformat(tree, leafnodes):
+ def _prettyformat(tree, level, lines):
+ if not isinstance(tree, tuple) or tree[0] in leafnodes:
+ lines.append((level, str(tree)))
+ else:
+ lines.append((level, '(%s' % tree[0]))
+ for s in tree[1:]:
+ _prettyformat(s, level + 1, lines)
+ lines[-1:] = [(lines[-1][0], lines[-1][1] + ')')]
+
+ lines = []
+ _prettyformat(tree, 0, lines)
+ output = '\n'.join((' ' * l + s) for l, s in lines)
+ return output