From: Dmitry Shachnev <mitya57@debian.org>
Date: Sat, 1 Dec 2018 12:51:11 +0300
Subject: Disable non-English search support

The lunr-languages library is unmaintained and incompatible with the
latest version of lunr, which we are going to use.
---
 docs/user-guide/configuration.md        | 46 ---------------------------------
 mkdocs/contrib/search/prebuild-index.js | 14 ----------
 mkdocs/tests/search_tests.py            |  2 ++
 3 files changed, 2 insertions(+), 60 deletions(-)

diff --git a/docs/user-guide/configuration.md b/docs/user-guide/configuration.md
index ff703b7..994282c 100644
--- a/docs/user-guide/configuration.md
+++ b/docs/user-guide/configuration.md
@@ -518,49 +518,6 @@ plugins:
 
   **default**: 3
 
-##### **lang**
-
-A list of languages to use when building the search index as identified by their
-[ISO 639-1] language codes. With [Lunr Languages], the following languages are
-supported:
-
-* `ar`: Arabic
-* `da`: Danish
-* `nl`: Dutch
-* `en`: English
-* `fi`: Finnish
-* `fr`: French
-* `de`: German
-* `hu`: Hungarian
-* `it`: Italian
-* `ja`: Japanese
-* `no`: Norwegian
-* `pt`: Portuguese
-* `ro`: Romanian
-* `ru`: Russian
-* `es`: Spanish
-* `sv`: Swedish
-* `th`: Thai
-* `tr`: Turkish
-* `vi`: Vietnamese
-
-You may [contribute additional languages].
-
-!!! Warning
-
-    While search does support using multiple languages together, it is best not
-    to add additional languages unless you really need them. Each additional
-    language adds significant bandwidth requirements and uses more browser
-    resources. Generally it is best to keep each instance of MkDocs to a single
-    language.
-
-!!! Note
-
-    Lunr Languages does not currently include support for Chinese or other Asian
-    languages. However, some users have reported decent results using Japanese.
-
-**default**: `['en']`
-
 ##### **prebuild_index**
 
 Optionally generates a pre-built index of all pages, which provides some
@@ -604,9 +561,6 @@ report it on [Lunr.py's issues] and fall back to the Node.js version.
 [extra_css]: #extra_css
 [Plugins]: plugins.md
 [lunr.js]: https://lunrjs.com/
-[ISO 639-1]: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
-[Lunr Languages]: https://github.com/MihaiValentin/lunr-languages#lunr-languages-----
-[contribute additional languages]: https://github.com/MihaiValentin/lunr-languages/blob/master/CONTRIBUTING.md
 [Node.js]: https://nodejs.org/
 [Lunr.py]: http://lunr.readthedocs.io/
 [Lunr.py's issues]: https://github.com/yeraydiazdiaz/lunr.py/issues
diff --git a/mkdocs/contrib/search/prebuild-index.js b/mkdocs/contrib/search/prebuild-index.js
index ae26da4..a23a033 100644
--- a/mkdocs/contrib/search/prebuild-index.js
+++ b/mkdocs/contrib/search/prebuild-index.js
@@ -15,20 +15,6 @@ stdin.on('end', function () {
       lang = ['en'];
 
   if (data.config) {
-    if (data.config.lang && data.config.lang.length) {
-      lang = data.config.lang;
-      if (lang.length > 1 || lang[0] !== "en") {
-        require('./lunr-language/lunr.stemmer.support')(lunr);
-        if (lang.length > 1) {
-          require('./lunr-language/lunr.multi')(lunr);
-        }
-        for (var i=0; i < lang.length; i++) {
-          if (lang[i] != 'en') {
-            require('./lunr-language/lunr.' + lang[i])(lunr);
-          }
-        }
-      }
-    }
     if (data.config.separator && data.config.separator.length) {
       lunr.tokenizer.separator = new RegExp(data.config.separator);
     }
diff --git a/mkdocs/tests/search_tests.py b/mkdocs/tests/search_tests.py
index 9953762..fe4ecf0 100644
--- a/mkdocs/tests/search_tests.py
+++ b/mkdocs/tests/search_tests.py
@@ -34,6 +34,7 @@ class SearchConfigTests(unittest.TestCase):
         value = option.validate(['en'])
         self.assertEqual(['en'], value)
 
+    @unittest.expectedFailure
     def test_lang_multi_list(self):
         option = search.LangOption()
         value = option.validate(['en', 'es', 'fr'])
@@ -67,6 +68,7 @@ class SearchPluginTests(unittest.TestCase):
         self.assertEqual(errors, [])
         self.assertEqual(warnings, [])
 
+    @unittest.expectedFailure
     def test_plugin_config_lang(self):
         expected = {
             'lang': ['es'],