Don't UnicodeDecodeError on non-ascii not-found hooks. Resolves #207.

pre_commit/five.py

@@ -20,3 +20,11 @@ else:  # pragma: no cover (PY3 only)
             return s
         else:
             return s.decode('UTF-8')
+
+
+def to_text(s):
+    return s if isinstance(s, text) else s.decode('UTF-8')
+
+
+def to_bytes(s):
+    return s if isinstance(s, bytes) else s.encode('UTF-8')

pre_commit/main.py

@@ -7,6 +7,7 @@ import sys
 import pkg_resources
 
 from pre_commit import color
+from pre_commit import five
 from pre_commit.commands.autoupdate import autoupdate
 from pre_commit.commands.clean import clean
 from pre_commit.commands.install_uninstall import install
@@ -25,6 +26,7 @@ os.environ.pop('__PYVENV_LAUNCHER__', None)
 
 def main(argv=None):
     argv = argv if argv is not None else sys.argv[1:]
+    argv = [five.to_text(arg) for arg in argv]
     parser = argparse.ArgumentParser()
 
     # http://stackoverflow.com/a/8521644/812183

pre_commit/output.py

@@ -77,12 +77,8 @@ def get_hook_message(
         )
 
 
-def sys_stdout_write_wrapper(s, stream=sys.stdout):
-    """Python 2.6 chokes on unicode being passed to sys.stdout.write.
+stdout_byte_stream = getattr(sys.stdout, 'buffer', sys.stdout)
 
-    This is an adapter because PY2 is ok with bytes and PY3 requires text.
-    """
-    assert type(s) is five.text
-    if five.PY2:  # pragma: no cover (PY2)
-        s = s.encode('UTF-8')
-    stream.write(s)
+
+def sys_stdout_write_wrapper(s, stream=stdout_byte_stream):
+    stream.write(five.to_bytes(s))