diff mercurial/extensions.py @ 36178:646002338365

py3: introduce and use pycompat.getargspec

This is getfullargspec on py3, which means we can't use namedtuple
named accessors for all fields (eg keywords from getargspec is varkw
from getfullargspec, with the same meaning). Solves some warning
issues on Python 3.

I didn't clean up httpclient because that's vendored code I think we
should probably discard, and I didn't touch the manpage generator for
now either.

Differential Revision: https://phab.mercurial-scm.org/D2251

--- a/mercurial/extensions.py	Tue Feb 13 23:37:58 2018 -0500
+++ b/mercurial/extensions.py	Tue Feb 13 23:00:01 2018 -0700
@@ -195,11 +195,7 @@
             try:
                 extsetup(ui)
             except TypeError:
-                # Try to use getfullargspec (Python 3) first, and fall
-                # back to getargspec only if it doesn't exist so as to
-                # avoid warnings.
-                if getattr(inspect, 'getfullargspec',
-                           getattr(inspect, 'getargspec'))(extsetup).args:
+                if pycompat.getargspec(extsetup).args:
                     raise
                 extsetup() # old extsetup with no ui argument
         except Exception as inst: