Adding HTMLProofer to Travis build

Signed-off-by: Lars Marowsky-Bree <[email protected]>

.travis.yml

@@ -1,7 +1,25 @@
 language: ruby
 rvm:
-- 2.3
-script: bundle exec jekyll build
+- 2.7
+script:
+  - bundle exec jekyll build
+  - bundle exec rake test
+
+cache:
+  directories:
+  - $TRAVIS_BUILD_DIR/tmp/.htmlproofer #https://github.com/gjtorikian/html-proofer/issues/381
+
+env:
+  global:
+  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer
+
+addons:
+  apt:
+    packages:
+    - libcurl4-openssl-dev # required to avoid SSL errors
+
+sudo: false
+
 deploy:
   provider: pages
   skip_cleanup: true

Gemfile

@@ -18,3 +18,7 @@ group :jekyll_plugins do
   gem "kramdown", ">= 2.3.0"
   gem "rake"
 end
+
+group :test do
+  gem 'html-proofer'
+end

Rakefile

@@ -0,0 +1,25 @@
+abort('Please run this using `bundle exec rake`') unless ENV["BUNDLE_BIN_PATH"]
+require 'html-proofer'
+
+desc "Test the website"
+task :test do
+  sh "bundle exec jekyll build"
+  options = {
+    :check_sri => true,
+    :check_external_hash => true,
+    :check_html => true,
+    :check_img_http => true,
+    :check_opengraph => true,
+    :enforce_https => true,
+    :cache => {
+      :timeframe => '6w'
+    }
+  }
+  begin
+    HTMLProofer.check_directory("_site/", options).run
+  rescue => msg
+    puts "#{msg}"
+  end
+end
+
+task :default => [:test]

_config.yml

@@ -23,6 +23,11 @@ header_pages:
   - FAQ.md
   - LICENSE.md
 
+exclude:
+  - Gemfile
+  - Gemfile.lock
+  - Rakefile
+
 collections:
   minutes:
     output: true