Add pg_jekyll script

bin/pg_jekyll.rb

@@ -0,0 +1,43 @@
+#!/usr/bin/env ruby
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at https://mozilla.org/MPL/2.0/. -}
+
+# frozen_string_literal: true
+
+require 'pg'
+
+connection = PG.connect(user: ENV['user'], dbname: ENV['DBNAME'])
+query = <<~SQL
+  SELECT articles.*, categories.name
+  FROM articles
+  INNER JOIN categories on categories.id = articles.category_id
+SQL
+connection.exec query do |result|
+  result.each do |row|
+    post_contents = <<~POST
+      ---
+      layout: post
+    POST
+
+    date = row['created_at'].gsub /\.[[:digit:]]+$/, '' # Remove milliseconds from the value.
+    post_contents << "date: #{date}\n"
+    category = row['name']
+    post_contents << "tags: #{category}\n"
+
+    if row['title'].include? '"'
+      post_contents << "title: |\n  #{row['title']}\n"
+    else
+      post_contents << "title: #{row['title']}\n"
+    end
+
+    post_contents << "teaser:\n  #{row['teaser']}\n" unless row['teaser'].nil?
+    post_contents << "---\n"
+    post_contents << "#{row['description'].delete("\r")}\n"
+
+    post_path = (Pathname.new('posts') + row['slug']).sub_ext('.html')
+
+    post_path.dirname.mkpath
+    post_path.write post_contents
+  end
+end