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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
@force_executables = options[:executables]
@force_all = options[:all]
@force_ignore = options[:ignore]
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
##
# Remove executables and batch files (windows only) for the gem as
# it is being installed
#
# gemspec::[Specification] the gem whose executables need to be removed.
#
def remove_executables(gemspec)
return if gemspec.nil?
if(gemspec.executables.size > 0)
raise Gem::FilePermissionError.new(Gem.bindir) unless
File.writable?(Gem.bindir)
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 = @force_executables || ask_yes_no(
"Remove executables and scripts for\n" +
"'#{gemspec.executables.join(", ")}' in addition to the gem?",
true) # " # appease ruby-mode - don't ask
unless answer
say "Executables and scripts will remain installed."
return
else
gemspec.executables.each do |exe_name|
say "Removing #{exe_name}"
File.unlink File.join(Gem.bindir, exe_name) rescue nil
File.unlink File.join(Gem.bindir, exe_name + ".bat") rescue nil
end
end
end
end
#
# list:: the list of all gems to remove
#
# Warning: this method modifies the +list+ parameter. Once it has
# uninstalled a gem, it is removed from that list.
#
def remove_all(list)
list.dup.each { |gem| remove(gem, 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 ok_to_remove? spec then
raise Gem::DependencyRemovalException,
"Uninstallation aborted due to dependent gem(s)"
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? gemspec 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 ok_to_remove?(spec)
return true if @force_ignore
srcindex = Gem::SourceIndex.from_installed_gems
deplist = Gem::DependencyList.from_source_index srcindex
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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