Class: Chef::Provider::Package::Yum

Inherits:
Chef::Provider::Package show all
Includes:
Mixin::GetSourceFromPackage
Defined in:
lib/chef/provider/package/yum.rb

Defined Under Namespace

Classes: RPMDb, RPMDbPackage, RPMDependency, RPMPackage, RPMProvide, RPMRequire, RPMUtils, RPMVersion, YumCache

Instance Attribute Summary

Attributes inherited from Chef::Provider::Package

#candidate_version

Attributes inherited from Chef::Provider

#action, #current_resource, #new_resource, #run_context

Instance Method Summary collapse

Methods inherited from Chef::Provider::Package

#action_install, #action_purge, #action_reconfig, #action_remove, #define_resource_requirements, #expand_options, #get_preseed_file, #preseed_package, #preseed_resource, #reconfig_package, #removing_package?, #target_version_already_installed?, #whyrun_supported?

Methods included from Mixin::Command

#chdir_or_tmpdir, #handle_command_failures, #output_of_command, #run_command, #run_command_with_systems_locale

Methods included from Mixin::Command::Windows

#popen4

Methods included from Mixin::Command::Unix

#popen4

Methods inherited from Chef::Provider

#action_nothing, #cleanup_after_converge, #cookbook_name, #define_resource_requirements, #events, #node, #process_resource_requirements, #requirements, #resource_collection, #run_action, #set_updated_status, #whyrun_mode?, #whyrun_supported?

Methods included from DSL::Recipe

#method_missing

Methods included from Mixin::ConvertToClassName

#convert_to_class_name, #convert_to_snake_case, #filename_to_qualified_string, #snake_case_basename

Constructor Details

#initialize(new_resource, run_context) ⇒ Yum

Returns a new instance of Yum.



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# File 'lib/chef/provider/package/yum.rb', line 943

def initialize(new_resource, run_context)
  super

  @yum = YumCache.instance
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Chef::DSL::Recipe

Instance Method Details

#action_upgrade ⇒ Object

Keep upgrades from trying to install an older candidate version. Can happen when a new version is installed then removed from a repository, now the older available version shows up as a viable install candidate.

Can be done in upgrade_package but an upgraded from->to log message slips out

Hacky - better overall solution? Custom compare in Package provider?



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# File 'lib/chef/provider/package/yum.rb', line 1148

def action_upgrade
  # Could be uninstalled or have no candidate
  if @current_resource.version.nil? || candidate_version.nil? 
    super
  # Ensure the candidate is newer
  elsif RPMVersion.parse(candidate_version) > RPMVersion.parse(@current_resource.version)
    super
  else
    Chef::Log.debug("#{@new_resource} is at the latest version - nothing to do")
  end
end

#allow_downgrade ⇒ Object 



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# File 'lib/chef/provider/package/yum.rb', line 968

def allow_downgrade
  if @new_resource.respond_to?("allow_downgrade")
    @new_resource.allow_downgrade
  else
    false
  end
end

#arch ⇒ Object

Extra attributes



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# File 'lib/chef/provider/package/yum.rb', line 952

def arch
  if @new_resource.respond_to?("arch")
    @new_resource.arch
  else
    nil
  end
end

#flush_cache ⇒ Object 



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# File 'lib/chef/provider/package/yum.rb', line 960

def flush_cache
  if @new_resource.respond_to?("flush_cache")
    @new_resource.flush_cache
  else
    { :before => false, :after => false }
  end
end

#install_package(name, version) ⇒ Object 



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# File 'lib/chef/provider/package/yum.rb', line 1095

def install_package(name, version)
  if @new_resource.source
    yum_command("yum -d0 -e0 -y#{expand_options(@new_resource.options)} localinstall #{@new_resource.source}")
  else
    # Work around yum not exiting with an error if a package doesn't exist for CHEF-2062
    if @yum.version_available?(name, version, arch)
      method = "install"
      log_method = "installing"

      # More Yum fun:
      #
      # yum install of an old name+version will exit(1)
      # yum install of an old name+version+arch will exit(0) for some reason
      #
      # Some packages can be installed multiple times like the kernel
      unless @yum.allow_multi_install.include?(name)
        if RPMVersion.parse(@current_resource.version) > RPMVersion.parse(version)
          # Unless they want this...
          if allow_downgrade
            method = "downgrade"
            log_method = "downgrading"
          else
            # we bail like yum when the package is older
            raise Chef::Exceptions::Package, "Installed package #{name}-#{@current_resource.version} is newer " +
                                             "than candidate package #{name}-#{version}"
          end
        end
      end

      repo = @yum.package_repository(name, version, arch)
      Chef::Log.info("#{@new_resource} #{log_method} #{name}-#{version}#{yum_arch} from #{repo} repository")

      yum_command("yum -d0 -e0 -y#{expand_options(@new_resource.options)} #{method} #{name}-#{version}#{yum_arch}")
    else
      raise Chef::Exceptions::Package, "Version #{version} of #{name} not found. Did you specify both version " +
                                       "and release? (version-release, e.g. 1.84-10.fc6)"
    end
  end

  if flush_cache[:after]
    @yum.reload
  else
    @yum.reload_installed
  end
end

#load_current_resource ⇒ Object

Standard Provider methods for Parent



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# File 'lib/chef/provider/package/yum.rb', line 1017

def load_current_resource
  if flush_cache[:before]
    @yum.reload
  end

  if @new_resource.options
    repo_control = []
    @new_resource.options.split.each do |opt|
      if opt =~ %r{--(enable|disable)repo=.+}
        repo_control << opt
      end
    end

    if repo_control.size > 0
      @yum.enable_extra_repo_control(repo_control.join(" "))
    else
      @yum.disable_extra_repo_control
    end
  else
    @yum.disable_extra_repo_control
  end

  # At this point package_name could be:
  # 
  # 1) a package name, eg: "foo"
  # 2) a package name.arch, eg: "foo.i386"
  # 3) or a dependency, eg: "foo >= 1.1"

  # Check if we have name or name+arch which has a priority over a dependency
  unless @yum.package_available?(@new_resource.package_name)
    # If they aren't in the installed packages they could be a dependency
    parse_dependency
  end

  # Don't overwrite an existing arch
  unless arch
    parse_arch
  end

  @current_resource = Chef::Resource::Package.new(@new_resource.name)
  @current_resource.package_name(@new_resource.package_name)

  if @new_resource.source
    unless ::File.exists?(@new_resource.source)
      raise Chef::Exceptions::Package, "Package #{@new_resource.name} not found: #{@new_resource.source}"
    end

    Chef::Log.debug("#{@new_resource} checking rpm status")
    status = popen4("rpm -qp --queryformat '%{NAME} %{VERSION}-%{RELEASE}\n' #{@new_resource.source}") do |pid, stdin, stdout, stderr|
      stdout.each do |line|
        case line
        when /([\w\d_.-]+)\s([\w\d_.-]+)/
          @current_resource.package_name($1)
          @new_resource.version($2)
        end
      end
    end
  end

  if @new_resource.version
    new_resource = "#{@new_resource.package_name}-#{@new_resource.version}#{yum_arch}"
  else
    new_resource = "#{@new_resource.package_name}#{yum_arch}"
  end

  Chef::Log.debug("#{@new_resource} checking yum info for #{new_resource}")

  installed_version = @yum.installed_version(@new_resource.package_name, arch)
  @current_resource.version(installed_version)

  @candidate_version = @yum.candidate_version(@new_resource.package_name, arch)

  Chef::Log.debug("#{@new_resource} installed version: #{installed_version || "(none)"} candidate version: " +
                  "#{@candidate_version || "(none)"}")

  @current_resource
end

#purge_package(name, version) ⇒ Object 



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# File 'lib/chef/provider/package/yum.rb', line 1178

def purge_package(name, version)
  remove_package(name, version)
end

#remove_package(name, version) ⇒ Object 



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# File 'lib/chef/provider/package/yum.rb', line 1164

def remove_package(name, version)
  if version
    yum_command("yum -d0 -e0 -y#{expand_options(@new_resource.options)} remove #{name}-#{version}#{yum_arch}")
  else
    yum_command("yum -d0 -e0 -y#{expand_options(@new_resource.options)} remove #{name}#{yum_arch}")
  end

  if flush_cache[:after]
    @yum.reload
  else
    @yum.reload_installed
  end
end

#upgrade_package(name, version) ⇒ Object 



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# File 'lib/chef/provider/package/yum.rb', line 1160

def upgrade_package(name, version)
  install_package(name, version)
end

#yum_arch ⇒ Object

Helpers



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# File 'lib/chef/provider/package/yum.rb', line 979

def yum_arch
  arch ? ".#{arch}" : nil
end

#yum_command(command) ⇒ Object 



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# File 'lib/chef/provider/package/yum.rb', line 983

def yum_command(command)
  status, stdout, stderr = output_of_command(command, {})

  # This is fun: rpm can encounter errors in the %post/%postun scripts which aren't
  # considered fatal - meaning the rpm is still successfully installed. These issue
  # cause yum to emit a non fatal warning but still exit(1). As there's currently no
  # way to suppress this behavior and an exit(1) will break a Chef run we make an
  # effort to trap these and re-run the same install command - it will either fail a
  # second time or succeed.
  #
  # A cleaner solution would have to be done in python and better hook into
  # yum/rpm to handle exceptions as we see fit.
  if status.exitstatus == 1
    stdout.each_line do |l|
      # rpm-4.4.2.3 lib/psm.c line 2182
      if l =~ %r{^error: %(post|postun)\(.*\) scriptlet failed, exit status \d+$}
        Chef::Log.warn("#{@new_resource} caught non-fatal scriptlet issue: \"#{l}\". Can't trust yum exit status " +
                       "so running install again to verify.")
        status, stdout, stderr = output_of_command(command, {})
        break
      end
    end
  end

  if status.exitstatus > 0
    command_output = "STDOUT: #{stdout}"
    command_output << "STDERR: #{stderr}"
    handle_command_failures(status, command_output, {})
  end
end