Validate YAML in ruby - useful for hiera

ruby-yaml-validate.sh

#!/bin/bash

#
# Efstathios Xagoraris <sxagoraris@gmail.com>
# Validate YAML files using ruby
#
ruby=/usr/share/logstash/vendor/jruby/bin/jruby


if [ $# -eq 0 ]
  then
    echo "Please provide a yaml file as argument eg $0 file.yaml"
    exit 1
fi

$ruby -ryaml -e "YAML.parse(File.open('${1}'))"

if [[ $? -ne 0 ]]
  then
    echo "$1 is not valid YAML"
    exit 1
  else
    echo "$1 is a valid YAML"
fi