#
#
# Author:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2009 Opscode, 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 'chef/knife'

class Chef
  class Knife
    class CookbookMetadata < Knife

      banner "Sub-Command: cookbook metadata COOKBOOK (options)"

      option :cookbook_path,
        :short => "-o PATH:PATH",
        :long => "--cookbook-path PATH:PATH",
        :description => "A colon-separated path to look for cookbooks in",
        :proc => lambda { |o| o.split(":") }

      option :all,
        :short => "-a",
        :long => "--all",
        :description => "Generate metadata for all cookbooks, rather than just a single cookbook"

      def run 
        if config[:cookbook_path]
          Chef::Config[:cookbook_path] = config[:cookbook_path]
        else
          config[:cookbook_path] = Chef::Config[:cookbook_path]
        end

        if config[:all] 
          cl = Chef::CookbookLoader.new
          cl.each do |cookbook|
            generate_metadata(cookbook.name.to_s)
          end
        else
          generate_metadata(@name_args[0]) 
        end
      end

      def generate_metadata(cookbook)
        Chef::Log.info("Generating metadata for #{cookbook}")
        config[:cookbook_path].reverse.each do |path|
          file = File.join(path, cookbook, 'metadata.rb')
          if File.exists?(file)
            Chef::Log.info("Generating from #{file}")
            md = Chef::Cookbook::Metadata.new
            md.name(cookbook)
            md.from_file(file)
            json_file = File.join(File.dirname(file), 'metadata.json')
            File.open(json_file, "w") do |f|
              f.write(JSON.pretty_generate(md))
            end
            generated = true 
            Chef::Log.info("Generated #{json_file}")
          else
            Chef::Log.debug("No #{file} found; skipping!")
          end
        end
      end

    end
  end
end