git-{cola,dag}: support installation prefixes with utf-8 paths

Decode the bytestring so that os.path.join() can operate on it now that
we're using unicode literals.

Closes #282

Reported-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
Signed-off-by: David Aguilar <davvid@gmail.com>

bin/git-cola

@@ -34,6 +34,8 @@ def setup_environment():
     # Try to detect where it is run from and set prefix and the search path.
     # It is assumed that the user installed Cola using the --prefix= option
     prefix = dirname(dirname(realpath(abspath(__file__))))
+    if sys.version_info[0] == 2:
+        prefix = prefix.decode('utf-8', 'replace')
 
     # Look for modules in the source or install trees
     cola_mod = os.path.join(prefix, 'cola', '__init__.py')

bin/git-dag

@@ -32,6 +32,8 @@ def setup_environment():
     # Try to detect where it is run from and set prefix and the search path.
     # It is assumed that the user installed Cola using the --prefix= option
     prefix = dirname(dirname(realpath(abspath(__file__))))
+    if sys.version_info[0] == 2:
+        prefix = prefix.decode('utf-8', 'replace')
 
     # Look for modules in the source or install trees
     cola_mod = os.path.join(prefix, 'cola', '__init__.py')

share/doc/git-cola/relnotes.rst

@@ -50,6 +50,8 @@ Fixes
 
   https://github.com/git-cola/git-cola/issues/273
 
+  https://github.com/git-cola/git-cola/issues/282
+
 * Fix viewing history from the file browser on Python3.
 
   https://github.com/git-cola/git-cola/issues/274