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# frozen_string_literal: true
#--
# 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/rdoc'
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 = {})
# TODO document the valid options
@gem = gem
@version = options[:version] || Gem::Requirement.default
@gem_home = File.realpath(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]
@abort_on_dependent = options[:abort_on_dependent]
# Indicate if development dependencies should be checked when
# uninstalling. (default: false)
#
@check_dev = options[:check_dev]
if options[:force]
@force_all = true
@force_ignore = true
end
# only add user directory if install_dir is not set
@user_install = false
@user_install = options[:user_install] unless options[:install_dir]
end
##
# Performs the uninstall of the gem. This removes the spec, the Gem
# directory, and the cached .gem file.
def uninstall
dependency = Gem::Dependency.new @gem, @version
list = []
dirs =
Gem::Specification.dirs +
[Gem.default_specifications_dir]
Gem::Specification.each_spec dirs do |spec|
next unless dependency.matches_spec? spec
list << spec
end
if list.empty?
raise Gem::InstallError, "gem #{@gem.inspect} is not installed"
end
default_specs, list = list.partition do |spec|
spec.default_gem?
end
default_specs.each do |default_spec|
say "Gem #{default_spec.full_name} cannot be uninstalled because it is a default gem"
end
list, other_repo_specs = list.partition do |spec|
@gem_home == spec.base_dir or
(@user_install and spec.base_dir == Gem.user_dir)
end
list.sort!
if list.empty?
return unless other_repo_specs.any?
other_repos = other_repo_specs.map { |spec| spec.base_dir }.uniq
message = ["#{@gem} is not installed in GEM_HOME, try:"]
message.concat other_repos.map { |repo|
"\tgem uninstall -i #{repo} #{@gem}"
}
raise Gem::InstallError, message.join("\n")
elsif @force_all
remove_all list
elsif list.size > 1
gem_names = list.map { |gem| gem.full_name }
gem_names << "All versions"
say
_, index = choose_from_list "Select gem to uninstall:", gem_names
if index == list.size
remove_all list
elsif index >= 0 && index < list.size
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
if abort_on_dependent? || !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?
executables = spec.executables.clone
# Leave any executables created by other installed versions
# of this gem installed.
list = Gem::Specification.find_all do |s|
s.name == spec.name && s.version != spec.version
end
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?
ask_yes_no("Remove executables:\n" +
"\t#{executables.join ', '}\n\n" +
"in addition to the gem?",
true)
else
@force_executables
end
if remove
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
safe_delete { FileUtils.rm exe_file }
safe_delete { FileUtils.rm "#{exe_file}.bat" }
end
else
say "Executables and scripts will remain installed."
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))
e = Gem::GemNotInHomeException.new \
"Gem '#{spec.full_name}' 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)
safe_delete { FileUtils.rm_r spec.full_gem_path }
safe_delete { FileUtils.rm_r spec.extension_dir }
old_platform_name = spec.original_name
gem = spec.cache_file
gem = File.join(spec.cache_dir, "#{old_platform_name}.gem") unless
File.exist? gem
safe_delete { FileUtils.rm_r gem }
Gem::RDoc.new(spec).remove
gemspec = spec.spec_file
unless File.exist? gemspec
gemspec = File.join(File.dirname(gemspec), "#{old_platform_name}.gemspec")
end
safe_delete { FileUtils.rm_r gemspec }
say "Successfully uninstalled #{spec.full_name}"
Gem::Specification.reset
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
##
# Returns true if it is OK to remove +spec+ or this is a forced
# uninstallation.
def dependencies_ok?(spec) # :nodoc:
return true if @force_ignore
deplist = Gem::DependencyList.from_specs
deplist.ok_to_remove?(spec.full_name, @check_dev)
end
##
# Should the uninstallation abort if a dependency will go unsatisfied?
#
# See ::new.
def abort_on_dependent? # :nodoc:
@abort_on_dependent
end
##
# Asks if it is OK to remove +spec+. Returns true if it is OK.
def ask_if_ok(spec) # :nodoc:
msg = ['']
msg << 'You have requested to uninstall the gem:'
msg << "\t#{spec.full_name}"
msg << ''
siblings = Gem::Specification.select do |s|
s.name == spec.name && s.full_name != spec.full_name
end
spec.dependent_gems.each do |dep_spec, dep, satlist|
unless siblings.any? { |s| s.satisfies_requirement? dep }
msg << "#{dep_spec.name}-#{dep_spec.version} depends on #{dep}"
end
end
msg << 'If you remove this gem, these dependencies will not be met.'
msg << 'Continue with Uninstall?'
return ask_yes_no(msg.join("\n"), false)
end
##
# Returns the formatted version of the executable +filename+
def formatted_program_filename(filename) # :nodoc:
# TODO perhaps the installer should leave a small manifest
# of what it did for us to find rather than trying to recreate
# it again.
if @format_executable
require 'rubygems/installer'
Gem::Installer.exec_format % File.basename(filename)
else
filename
end
end
def safe_delete(&block)
block.call
rescue Errno::ENOENT
nil
rescue Errno::EPERM
e = Gem::UninstallError.new
e.spec = @spec
raise e
end
end
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