Yamlint

#!/usr/bin/env ruby

require 'yaml'
ARGV.each do |file|
    if File.file? file
        begin
            YAML.load_file(file)
            puts "#{file} OK"
        rescue Exception => e
            puts "#{file} #{e.message}"
        end
    end
end

# save as /usr/local/bin/yamlint and make it executable
# quick: wget http://pastebin.com/raw/dGpQanF3 -O- | tr -d '\r' > /usr/local/bin/yamlint  && chmod +x /usr/local/bin/yamlint
# possible usage: find . -name '*.yml' | xargs yamlint