Merge pull request #2561 from samcv/Travis-CI

Add support for checking YAML validity using Travis CI

.travis.yml

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+language: ruby
+rvm:
+    - 2.2

Gemfile

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+source 'http://rubygems.org'
+group :test do
+    gem 'rake'
+    gem 'charlock_holmes'
+end

Rakefile

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+task default: %w[test]
+
+task :test do
+  Dir["./tests/*.rb"].each do |test_file|
+    begin
+    	ruby test_file
+    rescue
+      puts "FAILED #{test_file}!"
+    end
+  end
+end

tests/encoding.rb

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+#!/usr/bin/env ruby
+require 'charlock_holmes'
+$file_count = 0;
+markdown_files = Dir["./**/*.html.markdown"]
+markdown_files.each do |file|
+  begin
+    contents = File.read(file)
+    detection = CharlockHolmes::EncodingDetector.detect(contents)
+    case detection[:encoding]
+    when 'UTF-8'
+      $file_count = $file_count + 1
+    when 'ISO-8859-1'
+      $file_count = $file_count + 1
+    else
+      puts "#{file} was detected as #{detection[:encoding]} encoding! Please save the file in UTF-8!"
+    end
+  rescue Exception => msg
+    puts msg
+  end
+end
+files_failed = markdown_files.length - $file_count
+if files_failed != 0
+  puts "FAILURE!!! #{files_failed} files were unable to be validated as UTF-8!"
+  puts "Please resave the file as UTF-8."
+  exit 1
+else
+  puts "Success. All #{$file_count} files Ruby's UTF-8 validity checks. This won't catch most problems."
+  exit 0
+end

tests/yaml.rb

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+#!/usr/bin/env ruby
+require 'yaml';
+$file_count = 0;
+markdown_files = Dir["./**/*.html.markdown"]
+markdown_files.each do |file|
+  begin
+    YAML.load_file(file)
+    $file_count = $file_count + 1
+  rescue Exception => msg
+    puts msg
+  end
+end
+files_failed = markdown_files.length - $file_count
+if files_failed != 0
+  puts "FAILURE!!! #{files_failed} files were unable to be parsed!"
+  puts "Please check the YAML headers for the documents that failed!"
+  exit 1
+else
+  puts "Success. All #{$file_count} files were verified valid YAML"
+  exit 0
+end