change language list to only include languages with a minimum of engines

that support them.
users can still query lesser supported through the :lang_code bang.

searx/engines/gigablast.py

@@ -95,8 +95,13 @@ def _fetch_supported_languages(resp):
     dom = fromstring(resp.text)
     links = dom.xpath('//span[@id="menu2"]/a')
     for link in links:
-        code = link.xpath('./@href')[0][-2:]
+        href = link.xpath('./@href')[0].split('lang%3A')
-        if code != 'xx' and code not in supported_languages:
+        if len(href) == 2:
+            code = href[1].split('_')
+            if len(code) == 2:
+                code = code[0] + '-' + code[1].upper()
+            else:
+                code = code[0]
             supported_languages.append(code)
 
     return supported_languages

searx/engines/wikipedia.py

@@ -132,7 +132,7 @@ def _fetch_supported_languages(resp):
             english_name = td[1].xpath('./a')[0].text
             articles = int(td[4].xpath('./a/b')[0].text.replace(',', ''))
             # exclude languages with too few articles
-            if articles >= 100000:
+            if articles >= 100:
                 supported_languages[code] = {"name": name, "english_name": english_name, "articles": articles}
 
     return supported_languages

searx/languages.py

@@ -3,28 +3,18 @@
 # this file is generated automatically by utils/update_search_languages.py
 
 language_codes = (
-    (u"af", u"Afrikaans", u"", u""),
+    (u"ar-SA", u"العربية", u"", u"Arabic"),
-    (u"am", u"አማርኛ", u"", u"Amharic"),
+    (u"bg-BG", u"Български", u"", u"Bulgarian"),
-    (u"ar-SA", u"العربية", u"المملكة العربية السعودية", u"Arabic"),
-    (u"az", u"Azərbaycanca", u"", u"Azerbaijani"),
-    (u"be", u"Беларуская", u"", u"Belarusian"),
-    (u"bg-BG", u"Български", u"България", u"Bulgarian"),
-    (u"bn", u"বাংলা", u"", u"Bengali"),
-    (u"br", u"Brezhoneg", u"", u"Breton"),
-    (u"bs", u"Bosnian", u"", u"Bosnian"),
     (u"ca", u"Català", u"", u"Catalan"),
     (u"ca-CT", u"Català", u"", u"Catalan"),
     (u"ca-ES", u"Català", u"Espanya", u"Catalan"),
-    (u"ce", u"Нохчийн", u"", u"Chechen"),
+    (u"cs-CZ", u"Čeština", u"", u"Czech"),
-    (u"ceb", u"Sinugboanong Binisaya", u"", u"Cebuano"),
+    (u"da-DK", u"Dansk", u"", u"Danish"),
-    (u"cs-CZ", u"Čeština", u"Česko", u"Czech"),
-    (u"cy", u"Cymraeg", u"", u"Welsh"),
-    (u"da-DK", u"Dansk", u"Danmark", u"Danish"),
     (u"de", u"Deutsch", u"", u"German"),
     (u"de-AT", u"Deutsch", u"Österreich", u"German"),
     (u"de-CH", u"Deutsch", u"Schweiz", u"German"),
     (u"de-DE", u"Deutsch", u"Deutschland", u"German"),
-    (u"el-GR", u"Ελληνικά", u"Ελλάδα", u"Greek"),
+    (u"el-GR", u"Ελληνικά", u"", u"Greek"),
     (u"en", u"English", u"", u"English"),
     (u"en-AU", u"English", u"Australia", u"English"),
     (u"en-CA", u"English", u"Canada", u"English"),
@@ -38,7 +28,6 @@ language_codes = (
     (u"en-SG", u"English", u"Singapore", u"English"),
     (u"en-US", u"English", u"United States", u"English"),
     (u"en-ZA", u"English", u"South Africa", u"English"),
-    (u"eo", u"Esperanto", u"", u"Esperanto"),
     (u"es", u"Español", u"", u"Spanish"),
     (u"es-AR", u"Español", u"Argentina", u"Spanish"),
     (u"es-CL", u"Español", u"Chile", u"Spanish"),
@@ -47,85 +36,43 @@ language_codes = (
     (u"es-MX", u"Español", u"México", u"Spanish"),
     (u"es-PE", u"Español", u"Perú", u"Spanish"),
     (u"es-US", u"Español", u"Estados Unidos", u"Spanish"),
-    (u"et-EE", u"Eesti", u"Eesti", u"Estonian"),
+    (u"et-EE", u"Eesti", u"", u"Estonian"),
-    (u"eu", u"Euskara", u"", u"Basque"),
+    (u"fi-FI", u"Suomi", u"", u"Finnish"),
-    (u"fa", u"فارسی", u"", u"Persian"),
-    (u"fi-FI", u"Suomi", u"Suomi", u"Finnish"),
     (u"fr", u"Français", u"", u"French"),
     (u"fr-BE", u"Français", u"Belgique", u"French"),
     (u"fr-CA", u"Français", u"Canada", u"French"),
     (u"fr-CH", u"Français", u"Suisse", u"French"),
     (u"fr-FR", u"Français", u"France", u"French"),
-    (u"ga", u"Gaeilge", u"", u"Irish"),
+    (u"he-IL", u"עברית", u"", u"Hebrew"),
-    (u"gl", u"Galego", u"", u"Galician"),
+    (u"hr-HR", u"Hrvatski", u"", u"Croatian"),
-    (u"gu", u"ગુજરાતી", u"", u"Gujarati"),
+    (u"hu-HU", u"Magyar", u"", u"Hungarian"),
-    (u"he-IL", u"עברית", u"ישראל", u"Hebrew"),
+    (u"id-ID", u"Bahasa Indonesia", u"", u"Indonesian"),
-    (u"hi", u"हिन्दी", u"", u"Hindi"),
-    (u"hr-HR", u"Hrvatski", u"Hrvatska", u"Croatian"),
-    (u"hu-HU", u"Magyar", u"Magyarország", u"Hungarian"),
-    (u"hy", u"Հայերեն", u"", u"Armenian"),
-    (u"id-ID", u"Bahasa Indonesia", u"Indonesia", u"Indonesian"),
-    (u"is", u"Íslenska", u"", u""),
     (u"it", u"Italiano", u"", u"Italian"),
     (u"it-CH", u"Italiano", u"Svizzera", u"Italian"),
     (u"it-IT", u"Italiano", u"Italia", u"Italian"),
-    (u"iw", u"עברית", u"", u""),
+    (u"ja-JP", u"日本語", u"", u"Japanese"),
-    (u"ja-JP", u"日本語", u"日本", u"Japanese"),
+    (u"ko-KR", u"한국어", u"", u"Korean"),
-    (u"ka", u"ქართული", u"", u"Georgian"),
+    (u"lt-LT", u"Lietuvių", u"", u"Lithuanian"),
-    (u"kk", u"Қазақша", u"", u"Kazakh"),
+    (u"lv-LV", u"Latviešu", u"", u"Latvian"),
-    (u"kn", u"ಕನ್ನಡ", u"", u"Kannada"),
-    (u"ko-KR", u"한국어", u"대한민국", u"Korean"),
-    (u"la", u"Latina", u"", u"Latin"),
-    (u"lt-LT", u"Lietuvių", u"Lietuva", u"Lithuanian"),
-    (u"lv-LV", u"Latviešu", u"Latvijas Republika", u""),
-    (u"mi", u"Reo Māori", u"", u"Maori"),
-    (u"min", u"Minangkabau", u"", u"Minangkabau"),
-    (u"mk", u"Македонски", u"", u"Macedonian"),
-    (u"mn", u"Монгол", u"", u"Mongolian"),
-    (u"mr", u"मराठी", u"", u"Marathi"),
-    (u"ms-MY", u"Bahasa Melayu", u"Malaysia", u"Malay"),
-    (u"mt", u"Malti", u"", u"Maltese"),
-    (u"nb-NO", u"Norwegian Bokmål", u"Norge", u"Norwegian Bokmål"),
     (u"nl", u"Nederlands", u"", u"Dutch"),
     (u"nl-BE", u"Nederlands", u"België", u"Dutch"),
     (u"nl-NL", u"Nederlands", u"Nederland", u"Dutch"),
-    (u"nn", u"Nynorsk", u"", u"Norwegian"),
+    (u"no-NO", u"Norsk", u"", u"Norwegian"),
-    (u"no-NO", u"Norsk", u"Norge", u"Norwegian"),
+    (u"pl-PL", u"Polski", u"", u"Polish"),
-    (u"oc", u"Occitan", u"", u"Occitan"),
-    (u"or", u"Oriya", u"", u"Oriya"),
-    (u"pa", u"ਪੰਜਾਬੀ", u"", u"Panjabi"),
-    (u"pl-PL", u"Polski", u"Rzeczpospolita Polska", u"Polish"),
-    (u"ps", u"Pushto", u"", u"Pushto"),
     (u"pt", u"Português", u"", u"Portuguese"),
     (u"pt-BR", u"Português", u"Brasil", u"Portuguese"),
     (u"pt-PT", u"Português", u"Portugal", u"Portuguese"),
-    (u"ro-RO", u"Română", u"România", u"Romanian"),
+    (u"ro-RO", u"Română", u"", u"Romanian"),
-    (u"ru-RU", u"Русский", u"Россия", u"Russian"),
+    (u"ru-RU", u"Русский", u"", u"Russian"),
-    (u"rw", u"Ikinyarwanda", u"", u"Kinyarwanda"),
+    (u"sk-SK", u"Slovenčina", u"", u"Slovak"),
-    (u"sh", u"Srpskohrvatski / Српскохрватски", u"", u"Serbo-Croatian"),
-    (u"sk-SK", u"Slovenčina", u"Slovenská republika", u"Slovak"),
     (u"sl", u"Slovenščina", u"", u"Slovenian"),
-    (u"sr", u"Српски / Srpski", u"", u"Serbian"),
+    (u"sv-SE", u"Svenska", u"", u"Swedish"),
-    (u"sv-SE", u"Svenska", u"Sverige", u"Swedish"),
+    (u"th-TH", u"ไทย", u"", u"Thai"),
-    (u"sw", u"Kiswahili", u"", u""),
+    (u"tr-TR", u"Türkçe", u"", u"Turkish"),
-    (u"ta", u"தமிழ்", u"", u"Tamil"),
+    (u"uk-UA", u"Українська", u"", u"Ukrainian"),
-    (u"th-TH", u"ไทย", u"ไทย", u"Thai"),
+    (u"vi-VN", u"Tiếng Việt", u"", u"Vietnamese"),
-    (u"ti", u"ትግርኛ", u"", u"Tigrinya"),
-    (u"tl-PH", u"Filipino", u"Pilipinas", u""),
-    (u"tr-TR", u"Türkçe", u"Türkiye", u"Turkish"),
-    (u"tt", u"Татарча", u"", u"Tatar"),
-    (u"uk-UA", u"Українська", u"Україна", u"Ukrainian"),
-    (u"ur", u"اردو", u"", u"Urdu"),
-    (u"uz", u"O‘zbek", u"", u"Uzbek"),
-    (u"ve", u"Venda", u"", u"Venda"),
-    (u"vi-VN", u"Tiếng Việt", u"Công Hòa Xã Hội Chủ Nghĩa Việt Nam", u"Vietnamese"),
-    (u"vo", u"Volapük", u"", u"Volapük"),
-    (u"wa", u"Walon", u"", u"Walloon"),
-    (u"war", u"Winaray", u"", u"Waray-Waray"),
-    (u"xh", u"Xhosa", u"", u"Xhosa"),
     (u"zh", u"中文", u"", u"Chinese"),
     (u"zh-CN", u"中文", u"中国", u"Chinese"),
     (u"zh-HK", u"中文", u"香港", u"Chinese"),
-    (u"zh-TW", u"中文", u"台湾", u"Chinese"),
+    (u"zh-TW", u"中文", u"台湾", u"Chinese")
-    (u"zu", u"Isi-Zulu", u"", u"Zulu")
 )

searx/query.py

@@ -24,6 +24,8 @@ from searx.engines import (
 import string
 import re
 
+VALID_LANGUAGE_CODE = re.compile(r'^[a-z]{2,3}(\-[A-Z]{2})?$')
+
 
 class RawTextQuery(object):
     """parse raw text query (the value from the html input)"""
@@ -68,6 +70,11 @@ class RawTextQuery(object):
             if query_part[0] == ':':
                 lang = query_part[1:].lower()
 
+                # user may set a valid, yet not selectable language
+                if VALID_LANGUAGE_CODE.match(lang):
+                    self.languages.append(lang)
+                    parse_next = True
+
                 # check if any language-code is equal with
                 # declared language-codes
                 for lc in language_codes:

tests/robot/test_basic.robot

@@ -102,10 +102,10 @@ Change search language
     Page Should Contain  preferences
     Go To  http://localhost:11111/preferences
     List Selection Should Be  language  Default language
-    Select From List  language  Türkçe (Türkiye) - tr-TR
+    Select From List  language  Türkçe - tr-TR
     Submit Preferences
     Go To  http://localhost:11111/preferences
-    List Selection Should Be  language  Türkçe (Türkiye) - tr-TR
+    List Selection Should Be  language  Türkçe - tr-TR
 
 Change autocomplete
     Page Should Contain  about

tests/unit/engines/test_gigablast.py

@@ -103,7 +103,9 @@ class TestGigablastEngine(SearxTestCase):
                 <span id="menu2">
                     <a href="/search?&rxikd=1&qlang=xx"></a>
                     <a href="/search?&rxikd=1&qlang=en"></a>
-                    <a href="/search?&rxikd=1&qlang=fr"></a>
+                    <a href="/search?&rxikd=1&prepend=gblang%3Aen"></a>
+                    <a href="/search?&rxikd=1&qlang=zh_"></a>
+                    <a href="/search?&rxikd=1&prepend=gblang%3Azh_tw"></a>
                 </span>
             </body>
         </html>
@@ -113,4 +115,4 @@ class TestGigablastEngine(SearxTestCase):
         self.assertEqual(type(languages), list)
         self.assertEqual(len(languages), 2)
         self.assertIn('en', languages)
-        self.assertIn('fr', languages)
+        self.assertIn('zh-TW', languages)

utils/fetch_languages.py

@@ -25,7 +25,6 @@ engines_languages_file = 'engines_languages.json'
 languages_file = 'languages.py'
 
 engines_languages = {}
-languages = {}
 
 
 # To filter out invalid codes and dialects.
@@ -93,16 +92,15 @@ def fetch_supported_languages():
 # Join all language lists.
 # Iterate all languages supported by each engine.
 def join_language_lists():
+    global languages
     # include wikipedia first for more accurate language names
-    languages.update({code: lang for code, lang
+    languages = {code: lang for code, lang
                  in engines_languages['wikipedia'].iteritems()
-                      if valid_code(code)})
+                 if valid_code(code)}
 
     for engine_name in engines_languages:
         for locale in engines_languages[engine_name]:
-            if not valid_code(locale):
+            if valid_code(locale):
-                continue
-
                 # if language is not on list or if it has no name yet
                 if locale not in languages or not languages[locale].get('name'):
                     if isinstance(engines_languages[engine_name], dict):
@@ -110,6 +108,21 @@ def join_language_lists():
                     else:
                         languages[locale] = {}
 
+            # add to counter of engines that support given language
+            lang = locale.split('-')[0]
+            if lang in languages:
+                if 'counter' not in languages[lang]:
+                    languages[lang]['counter'] = [engine_name]
+                elif engine_name not in languages[lang]['counter']:
+                    languages[lang]['counter'].append(engine_name)
+
+    # filter list to include only languages supported by most engines
+    min_supported_engines = int(0.75 * len(engines_languages))
+    languages = {code: lang for code, lang
+                 in languages.iteritems()
+                 if len(lang.get('counter', [])) >= min_supported_engines or
+                 len(languages.get(code.split('-')[0], {}).get('counter', [])) >= min_supported_engines}
+
     # get locales that have no name or country yet
     for locale in languages.keys():
         # try to get language names
@@ -134,6 +147,7 @@ def join_language_lists():
 # Remove countryless language if language is featured in only one country.
 def filter_single_country_languages():
     prev_lang = None
+    prev_code = None
     for code in sorted(languages):
         lang = code.split('-')[0]
         if lang == prev_lang:
@@ -141,8 +155,10 @@ def filter_single_country_languages():
         else:
             if prev_lang is not None and countries == 1:
                 del languages[prev_lang]
+                languages[prev_code]['country'] = ''
             countries = 0
             prev_lang = lang
+        prev_code = code
 
 
 # Write languages.py.