readme: setup github pages to overcome 512k limit

asciidoctor/link-target-github.rb

@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+#
+# https://github.com/cirosantilli/linux-kernel-module-cheat#asciidoctor-link-target-up-rb
+
+require 'asciidoctor'
+require 'asciidoctor/extensions'
+
+require_relative 'link-target-up.rb'
+
+class LinkTargetGitHub < LinkTargetUp
+  named :link
+  def target_base
+    'https://github.com/cirosantilli/linux-kernel-module-cheat/blob/master/'
+  end
+end
+
+Asciidoctor::Extensions.register do
+  inline_macro LinkTargetGitHub
+end

asciidoctor/link-target-up.rb

@@ -1,29 +1,31 @@
 #!/usr/bin/env ruby
 
-=begin
-README.html links break because we place that output file in out/
-This extension hacks local link targets to the right path.
-=end
+# https://github.com/cirosantilli/linux-kernel-module-cheat#asciidoctor-link-target-up-rb
 
 require 'asciidoctor'
 require 'asciidoctor/extensions'
 
-class Main < Asciidoctor::Extensions::InlineMacroProcessor
+class LinkTargetUp < Asciidoctor::Extensions::InlineMacroProcessor
   use_dsl
   named :link
   ExternalLinkRegex = /^https?:\/\//
+
+  def target_base
+    '..'
+  end
+
   def process parent, target, attrs
     text = attrs[1]
     if text.nil? || text.empty?
       text = target
     end
     if !ExternalLinkRegex.match?(target)
-      target = File.join('..', target)
+      target = File.join(target_base, target)
     end
     create_anchor parent, text, type: :link, target: target
   end
 end
 
 Asciidoctor::Extensions.register do
-  inline_macro Main
+  inline_macro LinkTargetUp
 end