D3504: cborutil: port to Python 3

[durin42 (Augie Fackler)]

durin42 created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  The only problem lurking in here was sorts of mismatched types. The
  sorts are only for output stability in our tests (sigh), so we just
  build a phony sort key using the __name__ of types so that we only
  compare like types against each other. By pure luck, my awful sort key
  matches the behavior we get "for free" in Python 2, so no test output
  changes.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3504

AFFECTED FILES
  mercurial/utils/cborutil.py

CHANGE DETAILS

diff --git a/mercurial/utils/cborutil.py b/mercurial/utils/cborutil.py
--- a/mercurial/utils/cborutil.py
+++ b/mercurial/utils/cborutil.py
@@ -140,12 +140,15 @@
 
     yield BREAK
 
+def _mixedtypesortkey(v):
+    return type(v).__name__, v
+
 def streamencodeset(s):
     # https://www.iana.org/assignments/cbor-tags/cbor-tags.xhtml defines
     # semantic tag 258 for finite sets.
     yield encodelength(MAJOR_TYPE_SEMANTIC, 258)
 
-    for chunk in streamencodearray(sorted(s)):
+    for chunk in streamencodearray(sorted(s, key=_mixedtypesortkey)):
         yield chunk
 
 def streamencodemap(d):
@@ -155,7 +158,8 @@
     """
     yield encodelength(MAJOR_TYPE_MAP, len(d))
 
-    for key, value in sorted(d.iteritems()):
+    for key, value in sorted(d.iteritems(),
+                             key=lambda x: _mixedtypesortkey(x[0])):
         for chunk in streamencode(key):
             yield chunk
         for chunk in streamencode(value):



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