Revert: "Set up elasticsearch 7 to use sudachi"

This reverts commit ceabee16.

Gemfile

@@ -34,7 +34,7 @@ gem 'bootsnap', '~> 1.4', require: false
 gem 'browser'
 gem 'charlock_holmes', '~> 0.7.7'
 gem 'iso-639'
-gem 'chewy', git: 'https://github.com/noellabo/chewy.git', ref: 'bce53720beaab36d0cb8cfbd0bc98fb0e44ddaf0'
+gem 'chewy', '~> 5.1'
 gem 'cld3', '~> 3.2.6'
 gem 'devise', '~> 4.7'
 gem 'devise-two-factor', '~> 3.1'

Gemfile.lock

@@ -6,23 +6,6 @@ GIT
     health_check (4.0.0.pre)
       rails (>= 4.0)
 
-GIT
-  remote: https://github.com/noellabo/chewy.git
-  revision: bce53720beaab36d0cb8cfbd0bc98fb0e44ddaf0
-  ref: bce53720beaab36d0cb8cfbd0bc98fb0e44ddaf0
-  specs:
-    chewy (5.1.0)
-      activesupport (>= 4.0)
-      elasticsearch (>= 7.0.0)
-      elasticsearch-dsl
-      faraday (>= 0.17.0)
-
-GIT
-  remote: https://github.com/rack/rack.git
-  revision: 4ebd70b243d79cecda1ba55abce8e2ead78395d7
-  specs:
-    rack (2.2.0)
-
 GIT
   remote: https://github.com/rtomayko/posix-spawn
   revision: 58465d2e213991f8afb13b984854a49fcdcc980c
@@ -173,6 +156,10 @@ GEM
     case_transform (0.2)
       activesupport
     charlock_holmes (0.7.7)
+    chewy (5.1.0)
+      activesupport (>= 4.0)
+      elasticsearch (>= 2.0.0)
+      elasticsearch-dsl
     chunky_png (1.3.11)
     cld3 (3.2.6)
       ffi (>= 1.1.0, < 1.12.0)
@@ -719,7 +706,7 @@ DEPENDENCIES
   capistrano-yarn (~> 2.0)
   capybara (~> 3.30)
   charlock_holmes (~> 0.7.7)
-  chewy!
+  chewy (~> 5.1)
   cld3 (~> 3.2.6)
   climate_control (~> 0.2)
   concurrent-ruby

app/chewy/statuses_index.rb

@@ -2,26 +2,31 @@
 
 class StatusesIndex < Chewy::Index
   settings index: { refresh_interval: '15m' }, analysis: {
-    tokenizer: {
-      sudachi_tokenizer: {
-        type: 'sudachi_tokenizer',
-        mode: 'search',
-        discard_punctuation: true,
-        resources_path: '/etc/elasticsearch',
-        settings_path: '/etc/elasticsearch/sudachi.json',
+    filter: {
+      english_stop: {
+        type: 'stop',
+        stopwords: '_english_',
+      },
+      english_stemmer: {
+        type: 'stemmer',
+        language: 'english',
+      },
+      english_possessive_stemmer: {
+        type: 'stemmer',
+        language: 'possessive_english',
       },
     },
     analyzer: {
       content: {
+        tokenizer: 'uax_url_email',
         filter: %w(
+          english_possessive_stemmer
           lowercase
+          asciifolding
           cjk_width
-          sudachi_part_of_speech
-          sudachi_ja_stop
-          sudachi_baseform
+          english_stop
+          english_stemmer
         ),
-        tokenizer: 'sudachi_tokenizer',
-        type: 'custom',
       },
     },
   }