Mini Shell
require 'rubygems'
require 'rubygems/dependency_list'
require 'rubygems/package'
require 'rubygems/installer'
require 'rubygems/spec_fetcher'
require 'rubygems/user_interaction'
require 'rubygems/source'
require 'rubygems/available_set'
##
# Installs a gem along with all its dependencies from local and remote gems.
class Gem::DependencyInstaller
include Gem::UserInteraction
DEFAULT_OPTIONS = { # :nodoc:
:env_shebang => false,
:document => %w[ri],
:domain => :both, # HACK dup
:force => false,
:format_executable => false, # HACK dup
:ignore_dependencies => false,
:prerelease => false,
:security_policy => nil, # HACK NoSecurity requires OpenSSL. AlmostNo? Low?
:wrappers => true,
:build_args => nil,
:build_docs_in_background => false,
:install_as_default => false
}.freeze
##
# Documentation types. For use by the Gem.done_installing hook
attr_reader :document
##
# Errors from SpecFetcher while searching for remote specifications
attr_reader :errors
##
#--
# TODO remove, no longer used
attr_reader :gems_to_install # :nodoc:
##
# List of gems installed by #install in alphabetic order
attr_reader :installed_gems
##
# Creates a new installer instance.
#
# Options are:
# :cache_dir:: Alternate repository path to store .gem files in.
# :domain:: :local, :remote, or :both. :local only searches gems in the
# current directory. :remote searches only gems in Gem::sources.
# :both searches both.
# :env_shebang:: See Gem::Installer::new.
# :force:: See Gem::Installer#install.
# :format_executable:: See Gem::Installer#initialize.
# :ignore_dependencies:: Don't install any dependencies.
# :install_dir:: See Gem::Installer#install.
# :prerelease:: Allow prerelease versions. See #install.
# :security_policy:: See Gem::Installer::new and Gem::Security.
# :user_install:: See Gem::Installer.new
# :wrappers:: See Gem::Installer::new
# :build_args:: See Gem::Installer::new
def initialize options = {}
@only_install_dir = !!options[:install_dir]
@install_dir = options[:install_dir] || Gem.dir
@build_root = options[:build_root]
options = DEFAULT_OPTIONS.merge options
@bin_dir = options[:bin_dir]
@dev_shallow = options[:dev_shallow]
@development = options[:development]
@document = options[:document]
@domain = options[:domain]
@env_shebang = options[:env_shebang]
@force = options[:force]
@format_executable = options[:format_executable]
@ignore_dependencies = options[:ignore_dependencies]
@prerelease = options[:prerelease]
@security_policy = options[:security_policy]
@user_install = options[:user_install]
@wrappers = options[:wrappers]
@build_args = options[:build_args]
@build_docs_in_background = options[:build_docs_in_background]
@install_as_default = options[:install_as_default]
# Indicates that we should not try to update any deps unless
# we absolutely must.
@minimal_deps = options[:minimal_deps]
@available = nil
@installed_gems = []
@toplevel_specs = nil
@cache_dir = options[:cache_dir] || @install_dir
@errors = []
end
##
#--
# TODO remove, no longer used
def add_found_dependencies to_do, dependency_list # :nodoc:
seen = {}
dependencies = Hash.new { |h, name| h[name] = Gem::Dependency.new name }
until to_do.empty? do
spec = to_do.shift
# HACK why is spec nil?
next if spec.nil? or seen[spec.name]
seen[spec.name] = true
deps = spec.runtime_dependencies
if @development
if @dev_shallow
if @toplevel_specs.include? spec.full_name
deps |= spec.development_dependencies
end
else
deps |= spec.development_dependencies
end
end
deps.each do |dep|
dependencies[dep.name] = dependencies[dep.name].merge dep
if @minimal_deps
next if Gem::Specification.any? do |installed_spec|
dep.name == installed_spec.name and
dep.requirement.satisfied_by? installed_spec.version
end
end
results = find_gems_with_sources(dep)
results.sorted.each do |t|
to_do.push t.spec
end
results.remove_installed! dep
@available << results
results.inject_into_list dependency_list
end
end
dependency_list.remove_specs_unsatisfied_by dependencies
end
##
# Creates an AvailableSet to install from based on +dep_or_name+ and
# +version+
def available_set_for dep_or_name, version # :nodoc:
if String === dep_or_name then
find_spec_by_name_and_version dep_or_name, version, @prerelease
else
dep = dep_or_name.dup
dep.prerelease = @prerelease
@available = find_gems_with_sources dep
end
@available.pick_best!
end
##
# Indicated, based on the requested domain, if local
# gems should be considered.
def consider_local?
@domain == :both or @domain == :local
end
##
# Indicated, based on the requested domain, if remote
# gems should be considered.
def consider_remote?
@domain == :both or @domain == :remote
end
##
# Returns a list of pairs of gemspecs and source_uris that match
# Gem::Dependency +dep+ from both local (Dir.pwd) and remote (Gem.sources)
# sources. Gems are sorted with newer gems preferred over older gems, and
# local gems preferred over remote gems.
def find_gems_with_sources dep, best_only=false # :nodoc:
set = Gem::AvailableSet.new
if consider_local?
sl = Gem::Source::Local.new
if spec = sl.find_gem(dep.name)
if dep.matches_spec? spec
set.add spec, sl
end
end
end
if consider_remote?
begin
# TODO this is pulled from #spec_for_dependency to allow
# us to filter tuples before fetching specs.
#
tuples, errors = Gem::SpecFetcher.fetcher.search_for_dependency dep
if best_only && !tuples.empty?
tuples.sort! { |a,b| b[0].version <=> a[0].version }
tuples = [tuples.first]
end
specs = []
tuples.each do |tup, source|
begin
spec = source.fetch_spec(tup)
rescue Gem::RemoteFetcher::FetchError => e
errors << Gem::SourceFetchProblem.new(source, e)
else
specs << [spec, source]
end
end
if @errors
@errors += errors
else
@errors = errors
end
set << specs
rescue Gem::RemoteFetcher::FetchError => e
# FIX if there is a problem talking to the network, we either need to always tell
# the user (no really_verbose) or fail hard, not silently tell them that we just
# couldn't find their requested gem.
verbose do
"Error fetching remote data:\t\t#{e.message}\n" \
"Falling back to local-only install"
end
@domain = :local
end
end
set
end
##
# Finds a spec and the source_uri it came from for gem +gem_name+ and
# +version+. Returns an Array of specs and sources required for
# installation of the gem.
def find_spec_by_name_and_version gem_name,
version = Gem::Requirement.default,
prerelease = false
set = Gem::AvailableSet.new
if consider_local?
if gem_name =~ /\.gem$/ and File.file? gem_name then
src = Gem::Source::SpecificFile.new(gem_name)
set.add src.spec, src
elsif gem_name =~ /\.gem$/ then
Dir[gem_name].each do |name|
begin
src = Gem::Source::SpecificFile.new name
set.add src.spec, src
rescue Gem::Package::FormatError
end
end
else
local = Gem::Source::Local.new
if s = local.find_gem(gem_name, version)
set.add s, local
end
end
end
if set.empty?
dep = Gem::Dependency.new gem_name, version
dep.prerelease = true if prerelease
set = find_gems_with_sources(dep, true)
set.match_platform!
end
if set.empty?
raise Gem::SpecificGemNotFoundException.new(gem_name, version, @errors)
end
@available = set
end
##
# Gathers all dependencies necessary for the installation from local and
# remote sources unless the ignore_dependencies was given.
#--
# TODO remove at RubyGems 3
def gather_dependencies # :nodoc:
specs = @available.all_specs
# these gems were listed by the user, always install them
keep_names = specs.map { |spec| spec.full_name }
if @dev_shallow
@toplevel_specs = keep_names
end
dependency_list = Gem::DependencyList.new @development
dependency_list.add(*specs)
to_do = specs.dup
add_found_dependencies to_do, dependency_list unless @ignore_dependencies
# REFACTOR maybe abstract away using Gem::Specification.include? so
# that this isn't dependent only on the currently installed gems
dependency_list.specs.reject! { |spec|
not keep_names.include?(spec.full_name) and
Gem::Specification.include?(spec)
}
unless dependency_list.ok? or @ignore_dependencies or @force then
reason = dependency_list.why_not_ok?.map { |k,v|
"#{k} requires #{v.join(", ")}"
}.join("; ")
raise Gem::DependencyError, "Unable to resolve dependencies: #{reason}"
end
@gems_to_install = dependency_list.dependency_order.reverse
end
def in_background what # :nodoc:
fork_happened = false
if @build_docs_in_background and Process.respond_to?(:fork)
begin
Process.fork do
yield
end
fork_happened = true
say "#{what} in a background process."
rescue NotImplementedError
end
end
yield unless fork_happened
end
##
# Installs the gem +dep_or_name+ and all its dependencies. Returns an Array
# of installed gem specifications.
#
# If the +:prerelease+ option is set and there is a prerelease for
# +dep_or_name+ the prerelease version will be installed.
#
# Unless explicitly specified as a prerelease dependency, prerelease gems
# that +dep_or_name+ depend on will not be installed.
#
# If c-1.a depends on b-1 and a-1.a and there is a gem b-1.a available then
# c-1.a, b-1 and a-1.a will be installed. b-1.a will need to be installed
# separately.
def install dep_or_name, version = Gem::Requirement.default
request_set = resolve_dependencies dep_or_name, version
@installed_gems = []
options = {
:bin_dir => @bin_dir,
:build_args => @build_args,
:document => @document,
:env_shebang => @env_shebang,
:force => @force,
:format_executable => @format_executable,
:ignore_dependencies => @ignore_dependencies,
:prerelease => @prerelease,
:security_policy => @security_policy,
:user_install => @user_install,
:wrappers => @wrappers,
:build_root => @build_root,
:install_as_default => @install_as_default
}
options[:install_dir] = @install_dir if @only_install_dir
request_set.install options do |_, installer|
@installed_gems << installer.spec if installer
end
@installed_gems.sort!
# Since this is currently only called for docs, we can be lazy and just say
# it's documentation. Ideally the hook adder could decide whether to be in
# the background or not, and what to call it.
in_background "Installing documentation" do
Gem.done_installing_hooks.each do |hook|
hook.call self, @installed_gems
end
end unless Gem.done_installing_hooks.empty?
@installed_gems
end
def install_development_deps # :nodoc:
if @development and @dev_shallow then
:shallow
elsif @development then
:all
else
:none
end
end
def resolve_dependencies dep_or_name, version # :nodoc:
request_set = Gem::RequestSet.new
request_set.development = @development
request_set.development_shallow = @dev_shallow
request_set.soft_missing = @force
request_set.prerelease = @prerelease
request_set.remote = false unless consider_remote?
installer_set = Gem::Resolver::InstallerSet.new @domain
installer_set.ignore_installed = @only_install_dir
if consider_local?
if dep_or_name =~ /\.gem$/ and File.file? dep_or_name then
src = Gem::Source::SpecificFile.new dep_or_name
installer_set.add_local dep_or_name, src.spec, src
version = src.spec.version if version == Gem::Requirement.default
elsif dep_or_name =~ /\.gem$/ then
Dir[dep_or_name].each do |name|
begin
src = Gem::Source::SpecificFile.new name
installer_set.add_local dep_or_name, src.spec, src
rescue Gem::Package::FormatError
end
end
# else This is a dependency. InstallerSet handles this case
end
end
dependency =
if spec = installer_set.local?(dep_or_name) then
Gem::Dependency.new spec.name, version
elsif String === dep_or_name then
Gem::Dependency.new dep_or_name, version
else
dep_or_name
end
dependency.prerelease = @prerelease
request_set.import [dependency]
installer_set.add_always_install dependency
request_set.always_install = installer_set.always_install
if @ignore_dependencies then
installer_set.ignore_dependencies = true
request_set.ignore_dependencies = true
request_set.soft_missing = true
end
request_set.resolve installer_set
@errors.concat request_set.errors
request_set
end
end
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