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#--
# This file contains all the various exceptions and other errors that are used
# inside of RubyGems.
#
# DOC: Confirm _all_
#++
module Gem
##
# Raised when RubyGems is unable to load or activate a gem. Contains the
# name and version requirements of the gem that either conflicts with
# already activated gems or that RubyGems is otherwise unable to activate.
class LoadError < ::LoadError
# Name of gem
attr_accessor :name
# Version requirement of gem
attr_accessor :requirement
end
# Raised when there are conflicting gem specs loaded
class ConflictError < LoadError
##
# A Hash mapping conflicting specifications to the dependencies that
# caused the conflict
attr_reader :conflicts
##
# The specification that had the conflict
attr_reader :target
def initialize target, conflicts
@target = target
@conflicts = conflicts
@name = target.name
reason = conflicts.map { |act, dependencies|
"#{act.full_name} conflicts with #{dependencies.join(", ")}"
}.join ", "
# TODO: improve message by saying who activated `con`
super("Unable to activate #{target.full_name}, because #{reason}")
end
end
class ErrorReason; end
# Generated when trying to lookup a gem to indicate that the gem
# was found, but that it isn't usable on the current platform.
#
# fetch and install read these and report them to the user to aid
# in figuring out why a gem couldn't be installed.
#
class PlatformMismatch < ErrorReason
##
# the name of the gem
attr_reader :name
##
# the version
attr_reader :version
##
# The platforms that are mismatched
attr_reader :platforms
def initialize(name, version)
@name = name
@version = version
@platforms = []
end
##
# append a platform to the list of mismatched platforms.
#
# Platforms are added via this instead of injected via the constructor
# so that we can loop over a list of mismatches and just add them rather
# than perform some kind of calculation mismatch summary before creation.
def add_platform(platform)
@platforms << platform
end
##
# A wordy description of the error.
def wordy
"Found %s (%s), but was for platform%s %s" %
[@name,
@version,
@platforms.size == 1 ? '' : 's',
@platforms.join(' ,')]
end
end
##
# An error that indicates we weren't able to fetch some
# data from a source
class SourceFetchProblem < ErrorReason
##
# Creates a new SourceFetchProblem for the given +source+ and +error+.
def initialize(source, error)
@source = source
@error = error
end
##
# The source that had the fetch problem.
attr_reader :source
##
# The fetch error which is an Exception subclass.
attr_reader :error
##
# An English description of the error.
def wordy
"Unable to download data from #{@source.uri} - #{@error.message}"
end
##
# The "exception" alias allows you to call raise on a SourceFetchProblem.
alias exception error
end
end