Hugo to Asciidoctor

1 files changed, 152 insertions, 0 deletions

diff --git a/lib/command.rb b/lib/command.rb
new file mode 100644
index 0000000..81692b3
--- /dev/null
+++ b/lib/command.rb
@@ -0,0 +1,152 @@
+module NulDoc
+  class Command
+    def initialize(config)
+      @config = config
+      @content_dir = @config[:content_dir]
+      @dest_dir = @config[:dest_dir]
+      @template_dir = @config[:template_dir]
+      @parser = NulDoc::Parser.new(
+        {
+          'author' => @config[:author],
+          'site-copyright-year' => @config[:site_copyright_year],
+          'site-name' => @config[:site_name],
+          'source-highlighter' => 'rouge',
+          'reproducible' => true,
+          'sectids' => false,
+        },
+        @content_dir,
+        @template_dir,
+      )
+    end
+
+    def run
+      posts = generate_posts(@content_dir + '/posts')
+      generate_tags(posts)
+      generate_posts_list(posts)
+    end
+
+    private
+
+    def generate_posts(source_dir)
+      post_files = collect_post_files(source_dir)
+      posts = parse_posts(post_files)
+      output_posts(posts)
+      posts
+    end
+
+    def collect_post_files(source_dir)
+      file_paths = []
+      Dir.glob('**/*.adoc', base: source_dir, sort: true) do |path|
+        file_paths << "#{source_dir}/#{path}"
+      end
+      file_paths
+    end
+
+    def parse_posts(post_file_paths)
+      post_file_paths.map { @parser.parse_file(_1) }
+    end
+
+    def output_posts(posts)
+      posts.each do |post|
+        destination_file_path = post.attributes['source-file-path']
+          .sub(@content_dir, @dest_dir)
+          .sub('.adoc', '/index.html')
+        destination_dir = File.dirname(destination_file_path)
+        unless Dir.exist?(destination_dir)
+          FileUtils.makedirs(destination_dir)
+        end
+        open(destination_file_path, 'w') do |f|
+          f.puts(post.convert)
+        end
+      end
+    end
+
+    def generate_tags(posts)
+      tags_and_posts = collect_tags(posts)
+      tag_docs = build_tag_docs(tags_and_posts)
+      output_tags(tag_docs)
+    end
+
+    def collect_tags(posts)
+      tags_and_posts = {}
+      posts.each do |post|
+        post.attributes['tags'].each do |tag|
+          tags_and_posts[tag] ||= []
+          tags_and_posts[tag] << post
+        end
+      end
+      tags_and_posts
+        .transform_values {|posts|
+          posts.sort_by {|post|
+            post.attributes['revision-history'].first.date # created_at
+          }.reverse
+        }
+        .sort_by {|tag, _| tag.slug }
+        .to_h
+    end
+
+    def build_tag_docs(tags_and_posts)
+      tags_and_posts.map do |tag, posts|
+        [tag, build_tag_doc(tag, posts)]
+      end
+    end
+
+    def build_tag_doc(tag, posts)
+      erb = ERB.new(File.read(@template_dir + '/tag.html.erb'))
+      erb.result_with_hash({
+        tag: tag,
+        posts: posts,
+        author: @config[:author],
+        site_copyright_year: @config[:site_copyright_year],
+        site_name: @config[:site_name],
+        lang: 'ja-JP', # TODO
+        copyright_year: posts.last.attributes['revision-history'].first.date.year,
+        description: "タグ「#{tag.label}」のついた記事一覧",
+      })
+    end
+
+    def output_tags(tag_docs)
+      tag_docs.each do |tag, html|
+        destination_file_path = "#{@dest_dir}/tags/#{tag.slug}/index.html"
+        destination_dir = File.dirname(destination_file_path)
+        unless Dir.exist?(destination_dir)
+          FileUtils.makedirs(destination_dir)
+        end
+        open(destination_file_path, 'w') do |f|
+          f.puts(html)
+        end
+      end
+    end
+
+    def generate_posts_list(posts)
+      html = build_posts_list_doc(posts)
+      output_posts_list(html)
+    end
+
+    def build_posts_list_doc(posts)
+      erb = ERB.new(File.read(@template_dir + '/posts_list.html.erb'))
+      erb.result_with_hash({
+        posts: posts.reverse,
+        author: @config[:author],
+        site_copyright_year: @config[:site_copyright_year],
+        site_name: @config[:site_name],
+        lang: 'ja-JP', # TODO
+        copyright_year: @config[:site_copyright_year],
+        description: "記事一覧",
+        doctitle: "Posts",
+        header_title: "Posts",
+      })
+    end
+
+    def output_posts_list(html)
+      destination_file_path = "#{@dest_dir}/posts/index.html"
+      destination_dir = File.dirname(destination_file_path)
+      unless Dir.exist?(destination_dir)
+        FileUtils.makedirs(destination_dir)
+      end
+      open(destination_file_path, 'w') do |f|
+        f.puts(html)
+      end
+    end
+  end
+end