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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.
class Gem::Uninstaller
include Gem::UserInteraction
##
# Constructs an Uninstaller instance
#
# gem:: [String] The Gem name to uninstall
def initialize(gem, options = {})
@gem = gem
@version = options[:version] || Gem::Requirement.default
gem_home = options[:install_dir] || Gem.dir
@gem_home = File.expand_path gem_home
@force_executables = options[:executables]
@force_all = options[:all]
@force_ignore = options[:ignore]
@bin_dir = options[:bin_dir]
end
##
# Performs the uninstall of the Gem. This removes the spec, the
# Gem directory, and the cached .gem file,
def uninstall
list = Gem.source_index.search(/^#{@gem}$/, @version)
if list.empty? then
raise Gem::InstallError, "Unknown gem #{@gem} #{@version}"
elsif list.size > 1 && @force_all
remove_all(list.dup)
remove_executables(list.last)
elsif list.size > 1
say
gem_names = list.collect {|gem| gem.full_name} + ["All versions"]
gem_name, index =
choose_from_list("Select gem to uninstall:", gem_names)
if index == list.size
remove_all(list.dup)
remove_executables(list.last)
elsif index >= 0 && index < list.size
to_remove = list[index]
remove(to_remove, list)
remove_executables(to_remove)
else
say "Error: must enter a number [1-#{list.size+1}]"
end
else
remove(list[0], list.dup)
remove_executables(list.last)
end
end
##
# Removes installed executables and batch files (windows only) for
# +gemspec+.
def remove_executables(gemspec)
return if gemspec.nil?
if gemspec.executables.size > 0 then
bindir = @bin_dir ? @bin_dir : (Gem.bindir @gem_home)
list = Gem.source_index.search(gemspec.name).delete_if { |spec|
spec.version == gemspec.version
}
executables = gemspec.executables.clone
list.each do |spec|
spec.executables.each do |exe_name|
executables.delete(exe_name)
end
end
return if executables.size == 0
answer = if @force_executables.nil? then
ask_yes_no("Remove executables:\n" \
"\t#{gemspec.executables.join(", ")}\n\nin addition to the gem?",
true) # " # appease ruby-mode - don't ask
else
@force_executables
end
unless answer then
say "Executables and scripts will remain installed."
else
raise Gem::FilePermissionError, bindir unless File.writable? bindir
gemspec.executables.each do |exe_name|
say "Removing #{exe_name}"
FileUtils.rm_f File.join(bindir, exe_name)
FileUtils.rm_f File.join(bindir, "#{exe_name}.bat")
end
end
end
end
##
# Removes all gems in +list+.
#
# NOTE: removes uninstalled gems from +list+.
def remove_all(list)
list.dup.each { |spec| remove spec, list }
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, list)
unless dependencies_ok? spec then
raise Gem::DependencyRemovalException,
"Uninstallation aborted due to dependent gem(s)"
end
unless path_ok? spec then
e = Gem::GemNotInHomeException.new \
"Gem is not installed in directory #{@gem_home}"
e.spec = spec
raise e
end
raise Gem::FilePermissionError, spec.installation_path unless
File.writable?(spec.installation_path)
FileUtils.rm_rf spec.full_gem_path
original_platform_name = [
spec.name, spec.version, spec.original_platform].join '-'
spec_dir = File.join spec.installation_path, 'specifications'
gemspec = File.join spec_dir, "#{spec.full_name}.gemspec"
unless File.exist? gemspec then
gemspec = File.join spec_dir, "#{original_platform_name}.gemspec"
end
FileUtils.rm_rf gemspec
cache_dir = File.join spec.installation_path, 'cache'
gem = File.join cache_dir, "#{spec.full_name}.gem"
unless File.exist? gem then
gem = File.join cache_dir, "#{original_platform_name}.gem"
end
FileUtils.rm_rf gem
Gem::DocManager.new(spec).uninstall_doc
say "Successfully uninstalled #{spec.full_name}"
list.delete spec
end
def path_ok?(spec)
full_path = File.join @gem_home, 'gems', spec.full_name
original_path = File.join @gem_home, '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
source_index = Gem::SourceIndex.from_installed_gems
deplist = Gem::DependencyList.from_source_index source_index
deplist.ok_to_remove?(spec.full_name) || ask_if_ok(spec)
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 |gem,dep,satlist|
msg <<
("#{gem.name}-#{gem.version} depends on " +
"[#{dep.name} (#{dep.version_requirements})]")
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
end
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