Enable to change IDs with friendly redirects

docs/Gemfile

@@ -19,6 +19,7 @@ end
 group :jekyll_plugins do
   gem 'jekyll'
   gem 'jekyll-paginate'
+  gem 'jekyll-redirect-from'
   gem 'support-for'
   gem 'jekyll-seo-tag'
   gem 'jekyll-sitemap'

docs/Gemfile.lock

@@ -89,6 +89,8 @@ GEM
     jekyll-include-cache (0.2.1)
       jekyll (>= 3.7, < 5.0)
     jekyll-paginate (1.1.0)
+    jekyll-redirect-from (0.16.0)
+      jekyll (>= 3.3, < 5.0)
     jekyll-sass-converter (3.0.0)
       sass-embedded (~> 1.54)
     jekyll-seo-tag (2.8.0)
@@ -176,6 +178,7 @@ DEPENDENCIES
   jekyll
   jekyll-include-cache
   jekyll-paginate
+  jekyll-redirect-from
   jekyll-seo-tag
   jekyll-sitemap
   logger

docs/_config.yml

@@ -10,6 +10,7 @@ markdown: kramdown
 
 plugins:
   - jekyll-paginate
+  - jekyll-redirect-from
   - jekyll-sitemap # This must be LAST to include contents generated by gems above
 
 # It seems this pagination does nothing in this website

docs/upsert_data_by_readme.rb

@@ -46,7 +46,21 @@
   name_and_link = Kramdown::Document.new(cells[1]).root.children[0].children[0]
   name  = name_and_link.children[0].value.strip
   link  = name_and_link.attr['href']
-  id    = name.gsub(' ', '_')
+  id    = name.downcase # ID (v2)
+    .gsub('株式会社', '')
+    .gsub('inc.', '')
+    .gsub('＆', 'and')
+    .gsub('&',  'and')
+    .gsub('（', ' ')
+    .gsub('）', ' ')
+    .gsub('／', '_')
+    .strip.gsub(' ', '_').gsub('__', '_')
+    .delete(".,").downcase
+
+  # ID (v1): Need to archive each version for redirects with this plugin
+  # https://github.com/jekyll/jekyll-redirect-from
+  # NOTE: This plugin can handle redirect loop if `id == id_v1`
+  id_v1 = name.gsub(' ', '_')
     .gsub('＆', 'and')
     .gsub('&',  'and')
     .gsub('（', '(')
@@ -69,6 +83,8 @@
     link: #{link}
     commit_url: #{latest_commit_url}
     commit_at:  #{latest_commit_at}
+    redirect_from:
+      - /#{lang}/#{id_v1}
     ---
 
     #{CGI.unescapeHTML description}