Merge pull request #110 from ruby/cgit-ref-redirect

Redirect cgit ref browsing and range diffs to GitHub

Author: hsbt

recipes/files/etc/apache2/sites-available/git.ruby-lang.org.conf

@@ -41,5 +41,21 @@
         RewriteRule ^/ruby\.git/tree/(.*)$ https://github.com/ruby/ruby/tree/%1/$1 [R=302,L,NE,QSD]
         RewriteCond %{QUERY_STRING} (?:^|&)id=([0-9a-fA-F]{7,40})
         RewriteRule ^/ruby\.git/plain/(.*)$ https://github.com/ruby/ruby/raw/%1/$1 [R=302,L,NE,QSD]
+
+        # Range diffs (id2= without id=) are the heaviest cgit operation.
+        RewriteCond %{QUERY_STRING} (?:^|&)id2=([0-9a-fA-F]{7,40})
+        RewriteRule ^/ruby\.git/(?:diff|patch)(?:/.*)?$ https://github.com/ruby/ruby/compare/%1...master [R=302,L,NE,QSD]
+
+        # Browse by ref (h=) -> GitHub, except branches under active
+        # development which we still want to browse on cgit.
+        RewriteCond %{QUERY_STRING} (?:^|&)h=(?!(?:master|ruby_3_[345]|ruby_4_0)(?:&|$))([^&]+)
+        RewriteRule ^/ruby\.git/log(?:/.*)?$ https://github.com/ruby/ruby/commits/%1 [R=302,L,NE,QSD]
+        RewriteCond %{QUERY_STRING} (?:^|&)h=(?!(?:master|ruby_3_[345]|ruby_4_0)(?:&|$))([^&]+)
+        RewriteRule ^/ruby\.git/(?:commit|diff|patch)(?:/.*)?$ https://github.com/ruby/ruby/commit/%1 [R=302,L,NE,QSD]
+        RewriteCond %{QUERY_STRING} (?:^|&)h=(?!(?:master|ruby_3_[345]|ruby_4_0)(?:&|$))([^&]+)
+        RewriteRule ^/ruby\.git/tree/(.*)$ https://github.com/ruby/ruby/tree/%1/$1 [R=302,L,NE,QSD]
+        RewriteCond %{QUERY_STRING} (?:^|&)h=(?!(?:master|ruby_3_[345]|ruby_4_0)(?:&|$))([^&]+)
+        RewriteRule ^/ruby\.git/plain/(.*)$ https://github.com/ruby/ruby/raw/%1/$1 [R=302,L,NE,QSD]
+        RewriteCond %{QUERY_STRING} !(?:^|&)h=
         RewriteRule ^/ruby\.git/plain/(.*)$ https://github.com/ruby/ruby/raw/master/$1 [R=302,L,NE,QSD]
 </VirtualHost>