1 files changed, 27 insertions, 0 deletions
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