Move unicode_argv to its own file

DeDRM_plugin/argv_utils.py

@@ -1,14 +1,17 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-import sys, os
-import locale
-import codecs
-import importlib
+import sys
 
 # get sys.argv arguments and encode them into utf-8
-def unicode_argv():
-    if sys.platform.startswith('win'):
+def unicode_argv(default_name):
+
+    try:
+        from calibre.constants import iswindows
+    except:
+        iswindows = sys.platform.startswith('win')
+
+    if iswindows:
         # Uses shell32.GetCommandLineArgvW to get sys.argv as a list of Unicode
         # strings.
 
@@ -38,50 +41,8 @@ def unicode_argv():
                     range(start, argc.value)]
         # if we don't have any arguments at all, just pass back script name
         # this should never happen
-        return ["DeDRM.py"]
+        return [ default_name ]
     else:
         argvencoding = sys.stdin.encoding or "utf-8"
         return [arg if (isinstance(arg, str) or isinstance(arg,unicode)) else str(arg, argvencoding) for arg in sys.argv]
 
-
-def add_cp65001_codec():
-  try:
-    codecs.lookup('cp65001')
-  except LookupError:
-    codecs.register(
-        lambda name: name == 'cp65001' and codecs.lookup('utf-8') or None)
-  return
-
-
-def set_utf8_default_encoding():
-  if sys.getdefaultencoding() == 'utf-8':
-    return
-
-  # Regenerate setdefaultencoding.
-  importlib.reload(sys)
-  sys.setdefaultencoding('utf-8')
-
-  for attr in dir(locale):
-    if attr[0:3] != 'LC_':
-      continue
-    aref = getattr(locale, attr)
-    try:
-      locale.setlocale(aref, '')
-    except locale.Error:
-      continue
-    try:
-      lang = locale.getlocale(aref)[0]
-    except (TypeError, ValueError):
-      continue
-    if lang:
-      try:
-        locale.setlocale(aref, (lang, 'UTF-8'))
-      except locale.Error:
-        os.environ[attr] = lang + '.UTF-8'
-  try:
-    locale.setlocale(locale.LC_ALL, '')
-  except locale.Error:
-    pass
-  return
-
-