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# TODO: the documentation in here is terrible.
#
# Each exception needs a brief description and the scenarios where it is
# likely to be raised

##
# Base exception class for RubyGems.  All exception raised by RubyGems are a
# subclass of this one.
class Gem::Exception < RuntimeError
  attr_accessor :source_exception
end

class Gem::CommandLineError < Gem::Exception; end

class Gem::DependencyError < Gem::Exception; end

class Gem::DependencyRemovalException < Gem::Exception; end

##
# Raised when attempting to uninstall a gem that isn't in GEM_HOME.

class Gem::GemNotInHomeException < Gem::Exception
  attr_accessor :spec
end

class Gem::DocumentError < Gem::Exception; end

##
# Potentially raised when a specification is validated.
class Gem::EndOfYAMLException < Gem::Exception; end

##
# Signals that a file permission error is preventing the user from
# operating on the given directory.

class Gem::FilePermissionError < Gem::Exception

  attr_reader :directory

  def initialize directory
    @directory = directory

    super "You don't have write permissions for the #{directory} directory."
  end

end

##
# Used to raise parsing and loading errors
class Gem::FormatException < Gem::Exception
  attr_accessor :file_path
end

class Gem::GemNotFoundException < Gem::Exception; end

class Gem::SpecificGemNotFoundException < Gem::GemNotFoundException
  def initialize(name, version, errors=nil)
    super "Could not find a valid gem '#{name}' (#{version}) locally or in a repository"

    @name = name
    @version = version
    @errors = errors
  end

  attr_reader :name, :version, :errors
end

class Gem::InstallError < Gem::Exception; end

##
# Potentially raised when a specification is validated.
class Gem::InvalidSpecificationException < Gem::Exception; end

class Gem::OperationNotSupportedError < Gem::Exception; end

##
# Signals that a remote operation cannot be conducted, probably due to not
# being connected (or just not finding host).
#--
# TODO: create a method that tests connection to the preferred gems server.
# All code dealing with remote operations will want this.  Failure in that
# method should raise this error.
class Gem::RemoteError < Gem::Exception; end

class Gem::RemoteInstallationCancelled < Gem::Exception; end

class Gem::RemoteInstallationSkipped < Gem::Exception; end

##
# Represents an error communicating via HTTP.
class Gem::RemoteSourceException < Gem::Exception; end

class Gem::VerificationError < Gem::Exception; end

##
# Raised to indicate that a system exit should occur with the specified
# exit_code

class Gem::SystemExitException < SystemExit
  attr_accessor :exit_code

  def initialize(exit_code)
    @exit_code = exit_code

    super "Exiting RubyGems with exit_code #{exit_code}"
  end

end