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

Inherits:
Object
  • Object
show all
Defined in:
lib/chef/provider/package/yum.rb

Overview

Simple storage for RPMPackage objects - keeps them unique and sorted

Instance Method Summary collapse

Constructor Details

#initializeRPMDb

Returns a new instance of RPMDb


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# File 'lib/chef/provider/package/yum.rb', line 510

def initialize
  # package name => [ RPMPackage, RPMPackage ] of different versions
  @rpms = Hash.new
  # package nevra => RPMPackage for lookups
  @index = Hash.new
  # provide name (aka feature) => [RPMPackage, RPMPackage] each providing this feature
  @provides = Hash.new
  # RPMPackages listed as available
  @available = Set.new
  # RPMPackages listed as installed
  @installed = Set.new
end

Instance Method Details

#<<(*args) ⇒ Object


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# File 'lib/chef/provider/package/yum.rb', line 581

def <<(*args)
  self.push(args)
end

#[](package_name) ⇒ Object


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# File 'lib/chef/provider/package/yum.rb', line 523

def [](package_name)
  self.lookup(package_name)
end

#available?(package) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/package/yum.rb', line 614

def available?(package)
  @available.include?(package)
end

#available_sizeObject


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# File 'lib/chef/provider/package/yum.rb', line 606

def available_size
  @available.size
end

#clearObject


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# File 'lib/chef/provider/package/yum.rb', line 585

def clear
  @rpms.clear
  @index.clear
  @provides.clear
  clear_available
  clear_installed
end

#clear_availableObject


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# File 'lib/chef/provider/package/yum.rb', line 593

def clear_available
  @available.clear
end

#clear_installedObject


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# File 'lib/chef/provider/package/yum.rb', line 597

def clear_installed
  @installed.clear
end

#installed?(package) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/package/yum.rb', line 618

def installed?(package)
  @installed.include?(package)
end

#installed_sizeObject


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# File 'lib/chef/provider/package/yum.rb', line 610

def installed_size
  @installed.size
end

#lookup(package_name) ⇒ Object

Lookup package_name and return a descending array of package objects


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# File 'lib/chef/provider/package/yum.rb', line 528

def lookup(package_name)
  pkgs = @rpms[package_name]
  if pkgs
    return pkgs.sort.reverse
  else
    return nil
  end
end

#lookup_provides(provide_name) ⇒ Object


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# File 'lib/chef/provider/package/yum.rb', line 537

def lookup_provides(provide_name)
  @provides[provide_name]
end

#push(*args) ⇒ Object

Using the package name as a key, and nevra for an index, keep a unique list of packages. The available/installed state can be overwritten for existing packages.


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# File 'lib/chef/provider/package/yum.rb', line 543

def push(*args)
  args.flatten.each do |new_rpm|
    unless new_rpm.kind_of?(RPMDbPackage)
      raise ArgumentError, "Expecting an RPMDbPackage object"
    end

    @rpms[new_rpm.n] ||= Array.new

    # we may already have this one, like when the installed list is refreshed
    idx = @index[new_rpm.nevra]
    if idx
      # grab the existing package if it's not
      curr_rpm = idx
    else
      @rpms[new_rpm.n] << new_rpm

      new_rpm.provides.each do |provide|
        @provides[provide.name] ||= Array.new
        @provides[provide.name] << new_rpm
      end

      curr_rpm = new_rpm
    end

    # Track the nevra -> RPMPackage association to avoid having to compare versions
    # with @rpms[new_rpm.n] on the next round
    @index[new_rpm.nevra] = curr_rpm

    # these are overwritten for existing packages
    if new_rpm.available
      @available << curr_rpm
    end
    if new_rpm.installed
      @installed << curr_rpm
    end
  end
end

#sizeObject Also known as: length


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# File 'lib/chef/provider/package/yum.rb', line 601

def size
  @rpms.size
end

#whatprovides(rpmdep) ⇒ Object


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# File 'lib/chef/provider/package/yum.rb', line 622

def whatprovides(rpmdep)
  unless rpmdep.kind_of?(RPMDependency)
    raise ArgumentError, "Expecting an RPMDependency object"
  end

  what = []

  packages = lookup_provides(rpmdep.name)
  if packages
    packages.each do |pkg|
      pkg.provides.each do |provide|
        if provide.satisfy?(rpmdep)
          what << pkg
        end
      end
    end
  end

  return what
end