More flexible languages handling

Allow to use full language name as filename.

For example used here:

https://github.com/moneymanagerex/moneymanagerex/tree/master/poSigned-off-by: Michal Čihař <michal@cihar.com>

weblate/html/i18n.html

@@ -54,6 +54,7 @@ for l in Language.objects.exclude(name__contains='generated').values_list('name'
 {% trans "Danish" %}
 {% trans "Dogri" %}
 {% trans "Dutch" %}
+{% trans "Dutch (Belgium)" %}
 {% trans "Dzongkha" %}
 {% trans "English" %}
 {% trans "English (Australia)" %}
@@ -152,6 +153,7 @@ for l in Language.objects.exclude(name__contains='generated').values_list('name'
 {% trans "Serbian" %}
 {% trans "Serbian (cyrillic)" %}
 {% trans "Serbian (latin)" %}
+{% trans "Serbo-Croatian" %}
 {% trans "Simplified Chinese" %}
 {% trans "Sindhi" %}
 {% trans "Sinhala" %}

weblate/lang/data.py

@@ -328,6 +328,18 @@ EXTRALANGS = (
         1,
         '0',
     ),
+    (
+        'sh',
+        u'Serbo-Croatian',
+        3,
+        'n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2',
+    ),
+    (
+        'nl_BE',
+        u'Dutch (Belgium)',
+        2,
+        '(n != 1)',
+    ),
     # Wrong language code used by Java
     (
         'in',
@@ -634,3 +646,13 @@ PLURAL_NAMES = {
         pgettext_lazy('Plural form description', 'Other'),
     ),
 }
+
+LOCALE_ALIASES = {
+    'chinese_chs': 'zh_CN',
+    'chinese_zh': 'zh_TW',
+    'dutch_be': 'nl_BE',
+    'english-uk': 'en_GB',
+    'portuguese_br': 'pt_BR',
+    'portuguese_portugal': 'pt_PT',
+    'serbo-croatian': 'sh',
+}

weblate/lang/models.py

@@ -81,12 +81,12 @@ class LanguageManager(models.Manager):
             self._default_lang = self.get(code='en')
         return self._default_lang
 
-    def try_get(self, code):
+    def try_get(self, **kwargs):
         '''
         Tries to get language by code.
         '''
         try:
-            return self.get(code=code)
+            return self.get(**kwargs)
         except Language.DoesNotExist:
             return None
 
@@ -117,7 +117,19 @@ class LanguageManager(models.Manager):
         '''
 
         # First try getting langauge as is
-        ret = self.try_get(code)
+        ret = self.try_get(code=code)
+        if ret is not None:
+            return ret
+
+        # Try using name
+        ret = self.try_get(name=code.lower())
+        if ret is not None:
+            return ret
+
+        # Handle aliases
+        if code in data.LOCALE_ALIASES:
+            code = data.LOCALE_ALIASES[code]
+            ret = self.try_get(name=code)
             if ret is not None:
                 return ret
 
@@ -139,13 +151,13 @@ class LanguageManager(models.Manager):
         else:
             newcode = lang.lower()
 
-        ret = self.try_get(newcode)
+        ret = self.try_get(code=newcode)
         if ret is not None:
             return ret
 
         # Try canonical variant
         if SIMPLIFY_LANGUAGES and newcode in data.DEFAULT_LANGS:
-            ret = self.try_get(lang.lower())
+            ret = self.try_get(code=lang.lower())
             if ret is not None:
                 return ret
 
@@ -170,12 +182,12 @@ class LanguageManager(models.Manager):
         # Check for different variant
         if baselang is None and '@' in code:
             parts = code.split('@')
-            baselang = self.try_get(parts[0])
+            baselang = self.try_get(code=parts[0])
 
         # Check for different country
         if baselang is None and '_' in code or '-' in code:
             parts = code.replace('-', '_').split('_')
-            baselang = self.try_get(parts[0])
+            baselang = self.try_get(code=parts[0])
 
         if baselang is not None:
             lang.name = baselang.name

weblate/lang/tests.py

@@ -56,6 +56,12 @@ class LanguagesTest(TestCase):
             'ltr',
             'n != 1',
         ),
+        (
+            'portuguese_portugal',
+            'pt_PT',
+            'ltr',
+            'n > 1',
+        ),
         (
             'pt-rBR',
             'pt_BR',