dirstate: use arg count for version check
In 52ff07e1de91 in the main hg repo, dirstate was changed to require a second
argument, making the default args check no longer work. Instead, we switch
to check the number of arguments, which should be backwards and forwards
compatible.
--- a/hgext/evolve.py Mon Aug 01 22:55:11 2016 +0200
+++ b/hgext/evolve.py Mon Aug 08 10:05:47 2016 -0700
@@ -1024,7 +1024,7 @@
### dirstate compatibility layer < hg 3.6
def writedirstate(dirstate, tr):
- if dirstate.write.func_defaults is not None: # mercurial 3.6 and above
+ if dirstate.write.func_code.co_argcount != 1: # mercurial 3.6 and above
return dirstate.write(tr)
return dirstate.write()