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#
# Author:: Adam Jacob (<adam@hjksolutions.com>)
# Copyright:: Copyright (c) 2008 HJK Solutions, LLC
# 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 File.join(File.dirname(__FILE__), "..", "package")
require File.join(File.dirname(__FILE__), "..", "mixin", "command")

class Chef
  class Provider
    class Package
      class Apt < Chef::Provider::Package  
      
        def load_current_resource
          @current_resource = Chef::Resource::Package.new(@new_resource.name)
          @current_resource.package_name(@new_resource.package_name)
        
          status = popen4("apt-cache policy #{@new_resource.package_name}") do |pid, stdin, stdout, stderr|
            stdin.close
            stdout.each do |line|
              case line
              when /^\s{2}Installed: (.+)$/
                installed_version = $1
                if installed_version == '(none)'
                  @current_resource.version(nil)
                else
                  @current_resource.version(installed_version)
                end
              when /^\s{2}Candidate: (.+)$/
                @candidate_version = $1
              end
            end
          end

          unless status.exitstatus == 0
            raise Chef::Exception::Package, "apt-cache failed - #{status.inspect}!"
          end
        
          @current_resource
        end
      
        def install_package(name, version)
          run_command(
            :command => "apt-get -q -y install #{name}=#{version}",
            :environment => {
              "DEBIAN_FRONTEND" => "noninteractive"
            }
          )
        end
      
        def upgrade_package(name, version)
          install_package(name, version)
        end
      
        def remove_package(name, version)
          run_command(
            :command => "apt-get -q -y remove #{@new_resource.package_name}",
            :environment => {
              "DEBIAN_FRONTEND" => "noninteractive"
            }
          )
        end
      
        def purge_package(name, version)
          run_command(
            :command => "apt-get -q -y purge #{@new_resource.package_name}",
            :environment => {
              "DEBIAN_FRONTEND" => "noninteractive"
            }
          )
        end
      
      end
    end
  end
end