From 6209453817da9922f28bac1bb1522c6d380630ab Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sat, 19 Nov 2022 14:23:32 +0900
Subject: Hugo to Asciidoctor

---
 lib/extensions/section_id_validator.rb | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 lib/extensions/section_id_validator.rb

(limited to 'lib/extensions/section_id_validator.rb')

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
-- 
cgit v1.2.3-70-g09d2