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# frozen_string_literal: true
require_relative '../command'
require_relative '../package'
require_relative '../installer'
require_relative '../version_option'
class Gem::Commands::PristineCommand < Gem::Command
include Gem::VersionOption
def initialize
super 'pristine',
'Restores installed gems to pristine condition from files located in the gem cache',
:version => Gem::Requirement.default,
:extensions => true,
:extensions_set => false,
:all => false
add_option('--all',
'Restore all installed gems to pristine',
'condition') do |value, options|
options[:all] = value
end
add_option('--skip=gem_name',
'used on --all, skip if name == gem_name') do |value, options|
options[:skip] ||= []
options[:skip] << value
end
add_option('--[no-]extensions',
'Restore gems with extensions',
'in addition to regular gems') do |value, options|
options[:extensions_set] = true
options[:extensions] = value
end
add_option('--only-executables',
'Only restore executables') do |value, options|
options[:only_executables] = value
end
add_option('--only-plugins',
'Only restore plugins') do |value, options|
options[:only_plugins] = value
end
add_option('-E', '--[no-]env-shebang',
'Rewrite executables with a shebang',
'of /usr/bin/env') do |value, options|
options[:env_shebang] = value
end
add_option('-i', '--install-dir DIR',
'Gem repository to get binstubs and plugins installed') do |value, options|
options[:install_dir] = File.expand_path(value)
end
add_option('-n', '--bindir DIR',
'Directory where executables are',
'located') do |value, options|
options[:bin_dir] = File.expand_path(value)
end
add_version_option('restore to', 'pristine condition')
end
def arguments # :nodoc:
"GEMNAME gem to restore to pristine condition (unless --all)"
end
def defaults_str # :nodoc:
'--extensions'
end
def description # :nodoc:
<<-EOF
The pristine command compares an installed gem with the contents of its
cached .gem file and restores any files that don't match the cached .gem's
copy.
If you have made modifications to an installed gem, the pristine command
will revert them. All extensions are rebuilt and all bin stubs for the gem
are regenerated after checking for modifications.
If the cached gem cannot be found it will be downloaded.
If --no-extensions is provided pristine will not attempt to restore a gem
with an extension.
If --extensions is given (but not --all or gem names) only gems with
extensions will be restored.
EOF
end
def usage # :nodoc:
"#{program_name} [GEMNAME ...]"
end
def execute
specs = if options[:all]
Gem::Specification.map
# `--extensions` must be explicitly given to pristine only gems
# with extensions.
elsif options[:extensions_set] and
options[:extensions] and options[:args].empty?
Gem::Specification.select do |spec|
spec.extensions and not spec.extensions.empty?
end
else
get_all_gem_names.sort.map do |gem_name|
Gem::Specification.find_all_by_name(gem_name, options[:version]).reverse
end.flatten
end
specs = specs.select{|spec| RUBY_ENGINE == spec.platform || Gem::Platform.local === spec.platform || spec.platform == Gem::Platform::RUBY }
if specs.to_a.empty?
raise Gem::Exception,
"Failed to find gems #{options[:args]} #{options[:version]}"
end
say "Restoring gems to pristine condition..."
specs.each do |spec|
if spec.default_gem?
say "Skipped #{spec.full_name}, it is a default gem"
next
end
if options.has_key? :skip
if options[:skip].include? spec.name
say "Skipped #{spec.full_name}, it was given through options"
next
end
end
unless spec.extensions.empty? or options[:extensions] or options[:only_executables] or options[:only_plugins]
say "Skipped #{spec.full_name}, it needs to compile an extension"
next
end
gem = spec.cache_file
unless File.exist? gem or options[:only_executables] or options[:only_plugins]
require_relative '../remote_fetcher'
say "Cached gem for #{spec.full_name} not found, attempting to fetch..."
dep = Gem::Dependency.new spec.name, spec.version
found, _ = Gem::SpecFetcher.fetcher.spec_for_dependency dep
if found.empty?
say "Skipped #{spec.full_name}, it was not found from cache and remote sources"
next
end
spec_candidate, source = found.first
Gem::RemoteFetcher.fetcher.download spec_candidate, source.uri.to_s, spec.base_dir
end
env_shebang =
if options.include? :env_shebang
options[:env_shebang]
else
install_defaults = Gem::ConfigFile::PLATFORM_DEFAULTS['install']
install_defaults.to_s['--env-shebang']
end
bin_dir = options[:bin_dir] if options[:bin_dir]
install_dir = options[:install_dir] if options[:install_dir]
installer_options = {
:wrappers => true,
:force => true,
:install_dir => install_dir || spec.base_dir,
:env_shebang => env_shebang,
:build_args => spec.build_args,
:bin_dir => bin_dir,
}
if options[:only_executables]
installer = Gem::Installer.for_spec(spec, installer_options)
installer.generate_bin
elsif options[:only_plugins]
installer = Gem::Installer.for_spec(spec, installer_options)
installer.generate_plugins
else
installer = Gem::Installer.at(gem, installer_options)
installer.install
end
say "Restored #{spec.full_name}"
end
end
end