Hugo to Asciidoctor

7 files changed, 144 insertions, 0 deletions

diff --git a/lib/extensions/document_title_processor.rb b/lib/extensions/document_title_processor.rb
new file mode 100644
index 0000000..fd25844
--- /dev/null
+++ b/lib/extensions/document_title_processor.rb
@@ -0,0 +1,15 @@
+module Nuldoc
+  module Extensions
+    class DocumentTitleProcessor < Asciidoctor::Extensions::TreeProcessor
+      def process(doc)
+        doc.title = substitute_document_title(doc.title)
+      end
+
+      private
+
+      def substitute_document_title(title)
+        title.sub(/\A\[(.+?)\] /, '【\1】')
+      end
+    end
+  end
+end
diff --git a/lib/extensions/lang_attribute_processor.rb b/lib/extensions/lang_attribute_processor.rb
new file mode 100644
index 0000000..65511bc
--- /dev/null
+++ b/lib/extensions/lang_attribute_processor.rb
@@ -0,0 +1,9 @@
+module Nuldoc
+  module Extensions
+    class LangAttributeProcessor < Asciidoctor::Extensions::TreeProcessor
+      def process(doc)
+        doc.attributes['lang'] ||= 'ja-JP'
+      end
+    end
+  end
+end
diff --git a/lib/extensions/revision_history_processor.rb b/lib/extensions/revision_history_processor.rb
new file mode 100644
index 0000000..f416de0
--- /dev/null
+++ b/lib/extensions/revision_history_processor.rb
@@ -0,0 +1,27 @@
+module Nuldoc
+  module Extensions
+    class RevisionHistoryProcessor < Asciidoctor::Extensions::TreeProcessor
+      def process(doc)
+        revisions = []
+        i = 1
+        loop do
+          break unless (rev = doc.attributes["revision-#{i}"])
+          revisions << parse_revision(rev)
+          i += 1
+        end
+        doc.attributes['revision-history'] = revisions
+      end
+
+      private
+
+      def parse_revision(rev)
+        m = rev.match(/\A(\d\d\d\d-\d\d-\d\d) (.*)\z/)
+        raise unless m
+        Revision.new(
+          date: Date.parse(m[1], '%Y-%m-%d'),
+          remark: m[2],
+        )
+      end
+    end
+  end
+end
diff --git a/lib/extensions/section_id_validator.rb b/lib/extensions/section_id_validator.rb
new file mode 100644
index 0000000..2ad496c
--- /dev/null
+++ b/lib/extensions/section_id_validator.rb
@@ -0,0 +1,29 @@
+module Nuldoc
+  module Extensions
+    class SectionIdValidator < Asciidoctor::Extensions::TreeProcessor
+      def process(doc)
+        errors = []
+        (doc.find_by(context: :section) {_1.level > 0}).each do |section|
+          errors << validate_section(section)
+        end
+        error_message = errors.compact.join("\n")
+        unless error_message.empty?
+          raise "SectionIdValidator (#{doc.attributes['source-file-path']}):\n#{error_message}"
+        end
+      end
+
+      private
+
+      def validate_section(section)
+        id = section.id
+        unless id
+          return "Section '#{section.title}': each section MUST have an id."
+        end
+        unless id.match?(/\A[-0-9a-z]+\z/)
+          return "Section '#{section.title}' (##{id}): section id MUST consist of either hyphen, digits or lowercases."
+        end
+        nil
+      end
+    end
+  end
+end
diff --git a/lib/extensions/source_id_processor.rb b/lib/extensions/source_id_processor.rb
new file mode 100644
index 0000000..13813e0
--- /dev/null
+++ b/lib/extensions/source_id_processor.rb
@@ -0,0 +1,12 @@
+module Nuldoc
+  module Extensions
+    class SourceIdProcessor < Asciidoctor::Extensions::TreeProcessor
+      def process(doc)
+        errors = []
+        (doc.find_by(context: :listing) {_1.style == 'source'}).each do |source|
+          source.id = "source.#{source.id}"
+        end
+      end
+    end
+  end
+end
diff --git a/lib/extensions/source_id_validator.rb b/lib/extensions/source_id_validator.rb
new file mode 100644
index 0000000..6e04deb
--- /dev/null
+++ b/lib/extensions/source_id_validator.rb
@@ -0,0 +1,32 @@
+module Nuldoc
+  module Extensions
+    class SourceIdValidator < Asciidoctor::Extensions::TreeProcessor
+      def process(doc)
+        errors = []
+        (doc.find_by(context: :listing) {_1.style == 'source'}).each do |source|
+          errors << validate_section(source)
+        end
+        error_message = errors.compact.join("\n")
+        unless error_message.empty?
+          raise "SourceIdValidator (#{doc.attributes['source-file-path']}):\n#{error_message}"
+        end
+      end
+
+      private
+
+      def validate_section(source)
+        id = source.id
+        unless id
+          return "Each source MUST have an id."
+        end
+        if id.start_with?('source.')
+          return "Source id (##{id}) MUST NOT start with 'source.', which is appended by `nul`."
+        end
+        unless id.match?(/\A[-0-9a-z]+\z/)
+          return "Source id (##{id}) MUST consist of either hypen, digits or lowercases."
+        end
+        nil
+      end
+    end
+  end
+end
diff --git a/lib/extensions/tags_processor.rb b/lib/extensions/tags_processor.rb
new file mode 100644
index 0000000..efbd2a8
--- /dev/null
+++ b/lib/extensions/tags_processor.rb
@@ -0,0 +1,20 @@
+module Nuldoc
+  module Extensions
+    class TagsProcessor < Asciidoctor::Extensions::TreeProcessor
+      def process(doc)
+        doc.attributes['tags'] = convert_tags(doc.attributes['tags'])
+      end
+
+      private
+
+      def convert_tags(tags)
+        return [] unless tags
+
+        tags
+          .split(',')
+          .map(&:strip)
+          .map { Tag.from_slug(_1) }
+      end
+    end
+  end
+end