Add HTML Proofer to manually check broken HTML tags

Author: yasulab

Gemfile

@@ -1,3 +1,9 @@
 source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
 
+# Gems to manually check broken HTML tags
+# $ bundle exec rake test
+group :development, :test do
+  gem 'rake'
+  gem 'html-proofer'
+end

Gemfile.lock

@@ -13,6 +13,7 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
+    colorize (0.8.1)
     commonmarker (0.17.9)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.0.5)
@@ -84,6 +85,15 @@ GEM
     html-pipeline (2.8.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
+    html-proofer (3.9.2)
+      activesupport (>= 4.2, < 6.0)
+      addressable (~> 2.3)
+      colorize (~> 0.8)
+      mercenary (~> 0.3.2)
+      nokogiri (~> 1.8.1)
+      parallel (~> 1.3)
+      typhoeus (~> 1.3)
+      yell (~> 2.0)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
@@ -209,9 +219,11 @@ GEM
       mini_portile2 (~> 2.3.0)
     octokit (4.9.0)
       sawyer (~> 0.8.0, >= 0.5.3)
+    parallel (1.12.1)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
+    rake (12.3.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -237,12 +249,15 @@ GEM
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unicode-display_width (1.4.0)
+    yell (2.0.7)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   github-pages
+  html-proofer
+  rake
 
 BUNDLED WITH
-   1.16.1
+   1.16.3

Rakefile

@@ -0,0 +1,30 @@
+require "bundler/setup"
+task default: 'test'
+
+# cf. How to test a Jekyll site
+# http://joenyland.me/blog/how_to_test_a_jekyll_site/
+require 'html-proofer'
+task test: [:build] do
+  HTMLProofer.check_directory('./_site', {
+                                allow_hash_href:  true,
+                                check_opengraph:  true,
+                                check_favicon:    true,
+                                check_html:       true,
+                                disable_external: true,
+                                #file_ignore: [
+                                #  /node_modules/,
+                                #  "./_site/ja/workshops/raspi/index.html",
+                                #  "./_site/google********.html"
+                                #],
+                                url_ignore:  %w(coderdojo.com),
+                                http_status_ignore: [0, 500, 999],
+                             }).run
+end
+
+task build: [:clean] do
+  system 'bundle exec jekyll build'
+end
+
+task :clean do
+  system 'bundle exec jekyll clean'
+end