[enh] Retrieve value for current locale and use it for app description

app.py

@@ -211,7 +211,7 @@ def app_info(app, raw=False):
         else:
             return {
                 'name': app_info['manifest']['name'],
-                'description': app_info['manifest']['description']['en'],
+                'description': _value_for_locale(app_info['manifest']['description']),
                 # FIXME: Temporarly allow undefined license
                 'license': app_info['manifest'].get('license',
                     m18n.n('license_undefined')),
@@ -1112,6 +1112,27 @@ def _is_installed(app):
     return False
 
 
+def _value_for_locale(values):
+    """
+    Return proper value for current locale
+
+    Keyword arguments:
+        values -- A dict of values associated to their locale
+
+    """
+    if not isinstance(values, dict):
+        return values
+
+    for lang in [m18n.locale, m18n.default_locale]:
+        try:
+            return values[lang]
+        except KeyError:
+            continue
+
+    # Fallback to first value
+    return values.values()[0]
+
+
 def is_true(arg):
     """
     Convert a string into a boolean

hook.py

@@ -129,6 +129,8 @@ def hook_exec(file, args=None):
         args -- Arguments to pass to the script
 
     """
+    from yunohost.app import _value_for_locale
+
     if isinstance(args, list):
         arg_list = args
     else:
@@ -146,14 +148,7 @@ def hook_exec(file, args=None):
             else:
                 if os.isatty(1) and 'ask' in arg:
                     # Retrieve proper ask string
-                    ask_string = None
-                    for lang in [m18n.locale, m18n.default_locale]:
-                        if lang in arg['ask']:
-                            ask_string = arg['ask'][lang]
-                            break
-                    if not ask_string:
-                        # Fallback to en
-                        ask_string = arg['ask']['en']
+                    ask_string = _value_for_locale(arg['ask'])
 
                     # Append extra strings
                     if 'choices' in arg: