Fix locale for macOS

comictagger.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+import localefix
 from comictaggerlib.main import ctmain
 
 if __name__ == '__main__':

localefix.py

@@ -0,0 +1,44 @@
+import locale
+import os
+import subprocess
+import sys
+
+def _lang_code_mac():
+     """
+     stolen from https://github.com/mu-editor/mu
+     Returns the user's language preference as defined in the Language & Region
+     preference pane in macOS's System Preferences.
+     """
+
+     # Uses the shell command `defaults read -g AppleLocale` that prints out a
+     # language code to standard output. Assumptions about the command:
+     # - It exists and is in the shell's PATH.
+     # - It accepts those arguments.
+     # - It returns a usable language code.
+     #
+     # Reference documentation:
+     # - The man page for the `defaults` command on macOS.
+     # - The macOS underlying API:
+     #   https://developer.apple.com/documentation/foundation/nsuserdefaults.
+
+     LANG_DETECT_COMMAND = 'defaults read -g AppleLocale'
+
+     status, output = subprocess.getstatusoutput(LANG_DETECT_COMMAND)
+     if status == 0:
+         # Command was successful.
+         lang_code = output
+     else:
+         _logger.warning('Language detection command failed: %r', output)
+         lang_code = ''
+
+     return lang_code
+
+if sys.platform == "darwin" and "LANG" not in os.environ:
+    code = _lang_code_mac()
+    if code != "":
+        os.environ["LANG"] = f"{code}.utf-8"
+
+locale.setlocale(locale.LC_ALL, '')
+sys.stdout.reconfigure(encoding=sys.getdefaultencoding())
+sys.stderr.reconfigure(encoding=sys.getdefaultencoding())
+sys.stdin.reconfigure(encoding=sys.getdefaultencoding())