kallithea-cli: set ssh_locale when creating .ini file so it doesn't have to be set manually before using ssh

The Python standard library does not seem to provide a simple way to
determine the current locale without calling locale.setlocale() and thus
potentially influencing the rest of the program.

Instead, try to determine the locale based on environment variables present
when 'kallithea-cli config-create' is run, and use it to prepopulate the ini
file.

kallithea/bin/kallithea_cli_config.py

@@ -22,6 +22,7 b' from collections import defaultdict'
 
 import mako.exceptions
 
+import kallithea.lib.locale
 from kallithea.lib import inifile
 
 def show_defaults(ctx, param, value):
@@ -64,6 +65,7 b' def config_create(config_file, key_value'
         'git_hook_interpreter': sys.executable,
         'user_home_path': os.path.expanduser('~'),
         'kallithea_cli_path': cli_base.kallithea_cli_path,
+        'ssh_locale': kallithea.lib.locale.get_current_locale(),
     }
     ini_settings = defaultdict(dict)
 

kallithea/lib/locale.py

@@ -35,3 +35,14 b' def current_locale_is_valid():'
             log.error("Note: No locale setting found in environment variables - perhaps set LC_CTYPE to some value from 'locale -a', like 'C.UTF-8' or 'en_US.UTF-8'")
         return False
     return True
+
+def get_current_locale():
+    """Return the current locale based on environment variables.
+    There does not seem to be a good (and functional) way to get it via Python.
+    """
+    for var in ['LC_ALL', 'LC_CTYPE', 'LANG']:
+        val = os.environ.get(var)
+        if val:
+            log.debug('Determined current locale via environment variable %s (%s)', var, val)
+            return val
+    return None

kallithea/lib/paster_commands/template.ini.mako

@@ -346,6 +346,9 b' kallithea_cli_path = ${kallithea_cli_pat'
 <%text>## settings, which may not be available on the server.</%text>
 <%text>## See `locale -a` for valid values on this system.</%text>
 #ssh_locale = C.UTF-8
+%if ssh_locale:
+ssh_locale = ${ssh_locale}
+%endif
 
 <%text>####################################</%text>
 <%text>###        CELERY CONFIG        ####</%text>