Add script to detect missing language codes in the settings

This will prevent future issues like #272

F-Droid/tools/list-missing-langs-setting.py

@@ -0,0 +1,34 @@
+#!/bin/env python2
+
+# List supported languages missing from the preference array
+
+import glob
+import os
+import re
+from xml.etree import ElementTree
+
+prefs = set([''])
+trans = set([''])
+
+donottranslate = os.path.join('res', 'values', 'donottranslate.xml')
+
+for e in ElementTree.parse(donottranslate).getroot().findall('.//string-array'):
+    if e.attrib['name'] != 'languageValues':
+        continue
+    for i in e.findall('.//item'):
+        lang = i.text
+        if not lang:
+            continue
+        prefs.add(lang)
+
+for d in glob.glob(os.path.join('res', 'values-*')):
+    lang = d[len(os.path.join('res', 'values-')):]
+    if not lang:
+        continue
+    if re.match('^v[0-9]+$', lang):
+        continue
+    trans.add(lang)
+
+for lang in trans:
+    if lang not in prefs:
+        print lang