Add custom extension for package indices

lib/asciidoctor/foodogsquared-extensions.rb

@@ -15,6 +15,7 @@ require_relative 'gitlab-raw-content-include-processor/extension'
 require_relative 'chat-block-processor/extension'
 require_relative 'git-blob-include-processor/extension'
 require_relative 'wikipedia-inline-macro/extension'
+require_relative 'package-indices-link-macro/extension'
 
 Asciidoctor::Extensions.register do
   inline_macro ManInlineMacro
@@ -33,4 +34,8 @@ Asciidoctor::Extensions.register do
   preprocessor GitContentBranchAttributePreprocessor
 
   inline_macro WikipediaInlineMacro
+
+  inline_macro CtanLinkInlineMacro
+  inline_macro PypiLinkInlineMacro
+  inline_macro CratesIOLinkInlineMacro
 end

lib/asciidoctor/package-indices-link-macro/extension.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+# I'm fairly sure this could be programmed since Ruby has nice metaprogramming
+# capabilities. Though, we'll be keeping it manually defining classes for now
+# for initial versions since there could be additional features for each macro.
+
+class CtanLinkInlineMacro < Asciidoctor::Extensions::InlineMacroProcessor
+  use_dsl
+
+  named :ctan
+  name_positional_attributes 'caption'
+
+  def process(parent, target, attrs)
+    doc = parent.document
+    text = attrs['caption'] || target
+    url = %(https://ctan.org/pkg/#{target})
+
+    doc.register :links, url
+
+    create_anchor parent, text, type: :link, target: url
+  end
+end
+
+class PypiLinkInlineMacro < Asciidoctor::Extensions::InlineMacroProcessor
+  use_dsl
+
+  named :pypi
+  name_positional_attributes 'caption'
+
+  def process(parent, target, attrs)
+    doc = parent.document
+    text = attrs['caption'] || target
+    url = %(https://pypi.org/project/#{target})
+
+    doc.register :links, url
+
+    create_anchor parent, text, type: :link, target: url
+  end
+end
+
+class CratesIOLinkInlineMacro < Asciidoctor::Extensions::InlineMacroProcessor
+  use_dsl
+
+  named :cratesio
+  name_positional_attributes 'caption'
+
+  def process(parent, target, attrs)
+    doc = parent.document
+    text = attrs['caption'] || target
+    url = %(https://crates.io/crates/#{target})
+
+    doc.register :links, url
+
+    create_anchor parent, text, type: :link, target: url
+  end
+end