Assure powrap is compatible with Windows (#105)

powrap/powrap.py

@@ -27,7 +27,10 @@ def check_style(po_files: Iterable[str], no_wrap=False, quiet=False, diff=False)
         except OSError as open_error:
             tqdm.write(f"Error opening '{po_path}': {open_error}")
             continue
-        with NamedTemporaryFile("w+") as tmpfile:
+
+        delete = os.name == "posix" and sys.platform != "cygwin"
+
+        with NamedTemporaryFile("w+", delete=delete, encoding="utf-8") as tmpfile:
             args = ["msgcat", "-", "-o", tmpfile.name]
             if no_wrap:
                 args[1:1] = ["--no-wrap"]
@@ -49,6 +52,8 @@ def check_style(po_files: Iterable[str], no_wrap=False, quiet=False, diff=False)
                         new_po_content.splitlines(keepends=True),
                     ):
                         print(line, end="", file=sys.stderr)
+        if not delete:
+            os.remove(tmpfile.name)
     return errors
 
 
@@ -81,7 +86,7 @@ def path(path_str):
         if not path_obj.is_file():
             raise argparse.ArgumentTypeError("{!r} is not a file.".format(path_str))
         try:
-            path_obj.read_text()
+            path_obj.read_text(encoding="utf-8")
         except PermissionError as read_error:
             raise argparse.ArgumentTypeError(
                 "{!r}: Permission denied.".format(path_str)