changeset 141:ea80bd2775f6

hglib: introduce util.b() (issue4520)

The util.b() function will be used to mark all string literals in the
code base which should be treated as bytes instead of text. This is to
help with supporting Python 3.

--- a/hglib/util.py	Sat Jan 17 17:54:40 2015 -0800
+++ b/hglib/util.py	Sat Mar 07 10:08:52 2015 -0500
@@ -1,4 +1,13 @@
-import itertools, cStringIO, error, os, subprocess
+import itertools, cStringIO, error, os, subprocess, sys
+
+if sys.version_info[0] > 2:
+    def b(s):
+        """Encode the string as bytes."""
+        return s.encode('latin-1')
+else:
+    def b(s):
+        """Encode the string as bytes."""
+        return s
 
 def grouper(n, iterable):
     ''' list(grouper(2, range(4))) -> [(0, 1), (2, 3)] '''