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#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++
require 'fileutils'
require 'rubygems'
require 'rubygems/dependency_list'
require 'rubygems/doc_manager'
require 'rubygems/user_interaction'
##
# An Uninstaller.
#
# The uninstaller fires pre and post uninstall hooks. Hooks can be added
# either through a rubygems_plugin.rb file in an installed gem or via a
# rubygems/defaults/#{RUBY_ENGINE}.rb or rubygems/defaults/operating_system.rb
# file. See Gem.pre_uninstall and Gem.post_uninstall for details.
class Gem::Uninstaller
include Gem::UserInteraction
##
# The directory a gem's executables will be installed into
attr_reader :bin_dir
##
# The gem repository the gem will be installed into
attr_reader :gem_home
##
# The Gem::Specification for the gem being uninstalled, only set during
# #uninstall_gem
attr_reader :spec
##
# Constructs an uninstaller that will uninstall +gem+
def initialize(gem, options = {})
@gem = gem
@version = options[:version] || Gem::Requirement.default
@gem_home = File.expand_path(options[:install_dir] || Gem.dir)
@force_executables = options[:executables]
@force_all = options[:all]
@force_ignore = options[:ignore]
@bin_dir = options[:bin_dir]
@format_executable = options[:format_executable]
# only add user directory if install_dir is not set
@user_install = false
@user_install = options[:user_install] unless options[:install_dir]
if @user_install then
Gem.use_paths Gem.user_dir, @gem_home
else
Gem.use_paths @gem_home
end
end
##
# Performs the uninstall of the gem. This removes the spec, the Gem
# directory, and the cached .gem file.
def uninstall
list = Gem::Specification.find_all_by_name(@gem, @version)
if list.empty? then
raise Gem::InstallError, "gem #{@gem.inspect} is not installed"
elsif list.size > 1 and @force_all then
remove_all list
elsif list.size > 1 then
gem_names = list.collect {|gem| gem.full_name} + ["All versions"]
say
_, index = choose_from_list "Select gem to uninstall:", gem_names
if index == list.size then
remove_all list
elsif index >= 0 && index < list.size then
uninstall_gem list[index]
else
say "Error: must enter a number [1-#{list.size+1}]"
end
else
uninstall_gem list.first
end
end
##
# Uninstalls gem +spec+
def uninstall_gem(spec)
@spec = spec
unless dependencies_ok? spec
unless ask_if_ok(spec)
raise Gem::DependencyRemovalException,
"Uninstallation aborted due to dependent gem(s)"
end
end
Gem.pre_uninstall_hooks.each do |hook|
hook.call self
end
remove_executables @spec
remove @spec
Gem.post_uninstall_hooks.each do |hook|
hook.call self
end
@spec = nil
end
##
# Removes installed executables and batch files (windows only) for
# +gemspec+.
def remove_executables(spec)
return if spec.nil? or spec.executables.empty?
list = Gem::Specification.find_all { |s|
s.name == spec.name && s.version != spec.version
}
executables = spec.executables.clone
list.each do |s|
s.executables.each do |exe_name|
executables.delete exe_name
end
end
return if executables.empty?
executables = executables.map { |exec| formatted_program_filename exec }
remove = if @force_executables.nil? then
ask_yes_no("Remove executables:\n" \
"\t#{executables.join ', '}\n\n" \
"in addition to the gem?",
true)
else
@force_executables
end
unless remove then
say "Executables and scripts will remain installed."
else
bin_dir = @bin_dir || Gem.bindir(spec.base_dir)
raise Gem::FilePermissionError, bin_dir unless File.writable? bin_dir
executables.each do |exe_name|
say "Removing #{exe_name}"
exe_file = File.join bin_dir, exe_name
FileUtils.rm_f exe_file
FileUtils.rm_f "#{exe_file}.bat"
end
end
end
##
# Removes all gems in +list+.
#
# NOTE: removes uninstalled gems from +list+.
def remove_all(list)
list.each { |spec| uninstall_gem spec }
end
##
# spec:: the spec of the gem to be uninstalled
# list:: the list of all such gems
#
# Warning: this method modifies the +list+ parameter. Once it has
# uninstalled a gem, it is removed from that list.
def remove(spec)
unless path_ok?(@gem_home, spec) or
(@user_install and path_ok?(Gem.user_dir, spec)) then
e = Gem::GemNotInHomeException.new \
"Gem is not installed in directory #{@gem_home}"
e.spec = spec
raise e
end
raise Gem::FilePermissionError, spec.base_dir unless
File.writable?(spec.base_dir)
FileUtils.rm_rf spec.full_gem_path
# TODO: should this be moved to spec?... I vote eww (also exists in docmgr)
old_platform_name = [spec.name,
spec.version,
spec.original_platform].join '-'
gemspec = spec.spec_file
unless File.exist? gemspec then
gemspec = File.join(File.dirname(gemspec), "#{old_platform_name}.gemspec")
end
FileUtils.rm_rf gemspec
gem = spec.cache_file
gem = File.join(spec.cache_dir, "#{old_platform_name}.gem") unless
File.exist? gem
FileUtils.rm_rf gem
Gem::DocManager.new(spec).uninstall_doc
say "Successfully uninstalled #{spec.full_name}"
Gem::Specification.remove_spec spec
end
##
# Is +spec+ in +gem_dir+?
def path_ok?(gem_dir, spec)
full_path = File.join gem_dir, 'gems', spec.full_name
original_path = File.join gem_dir, 'gems', spec.original_name
full_path == spec.full_gem_path || original_path == spec.full_gem_path
end
def dependencies_ok?(spec)
return true if @force_ignore
deplist = Gem::DependencyList.from_specs
deplist.ok_to_remove?(spec.full_name)
end
def ask_if_ok(spec)
msg = ['']
msg << 'You have requested to uninstall the gem:'
msg << "\t#{spec.full_name}"
spec.dependent_gems.each do |dep_spec, dep, satlist|
msg <<
("#{dep_spec.name}-#{dep_spec.version} depends on " +
"[#{dep.name} (#{dep.requirement})]")
end
msg << 'If you remove this gems, one or more dependencies will not be met.'
msg << 'Continue with Uninstall?'
return ask_yes_no(msg.join("\n"), true)
end
def formatted_program_filename(filename)
if @format_executable then
require 'rubygems/installer'
Gem::Installer.exec_format % File.basename(filename)
else
filename
end
end
end