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#!/usr/bin/env ruby
#
# ./chef-vault - Run chef-vault and decrypt based on parameters
#
# Author:: Kevin Moser (<kevin.moser@nordstrom.com>)
# Copyright:: Copyright (c) 2013-15 Nordstrom, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require "optparse"

options_config = {
  chef: {
    short: "k",
    long: "chef-config-file",
    description: "Chef config file",
    default: "/etc/chef/knife.rb",
    optional: false,
  },
  vault: {
    short: "v",
    long: "vault",
    description: "Vault to look in",
    default: nil,
    optional: false,
  },
  item: {
    short: "i",
    long: "item",
    description: "Item to decrypt in vault",
    default: nil,
    optional: false,
  },
  values: {
    short: "a",
    long: "values",
    description: "Values of item to decrypt in vault",
    default: nil,
    optional: false,
  },
}

banner = "Usage: chef-vault "
options_config.each do |option, config|
  if config[:optional]
    banner << "[--#{config[:long]} #{config[:long].upcase}] "
  else
    banner << "--#{config[:long]} #{config[:long].upcase} "
  end
end

options = {}
OptionParser.new do |opts|
  opts.banner = banner

  options_config.each do |option, config|
    description = "#{config[:description]}"
    description << " (#{config[:default]})" if config[:default]
    description << " MANDATORY" unless config[:default]
    opts.on("-#{config[:short]}", "--#{config[:long]} #{config[:long].upcase}", description) do |opt|
      options[option] = opt
    end
  end
end.parse!

options_config.each do |option, config|
  raise OptionParser::MissingArgument, option if options[option].nil? && !config[:optional]
end

options_config.each do |option, config|
  options[option] = options[option] ? options[option] : config[:default]
end

require "rubygems"
$:.unshift(File.join(File.dirname(__FILE__), "..", "lib"))
require "chef-vault"

ChefVault::Log.init(STDOUT)
ChefVault.load_config(options[:chef])
item = ChefVault::Item.load(options[:vault], options[:item])

ChefVault::Log.info "#{options[:vault]}/#{options[:item]}"

options[:values].split(",").each do |value|
  value.strip! # remove white space
  ChefVault::Log.info("\t#{value}: #{item[value]}")
end