262 lines
8.1 KiB
Ruby
262 lines
8.1 KiB
Ruby
require 'rubygems'
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require 'rubygems/dependency_list'
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require 'rubygems/installer'
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require 'rubygems/spec_fetcher'
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require 'rubygems/user_interaction'
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##
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# Installs a gem along with all its dependencies from local and remote gems.
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class Gem::DependencyInstaller
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include Gem::UserInteraction
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attr_reader :gems_to_install
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attr_reader :installed_gems
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DEFAULT_OPTIONS = {
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:env_shebang => false,
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:domain => :both, # HACK dup
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:force => false,
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:format_executable => false, # HACK dup
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:ignore_dependencies => false,
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:prerelease => false,
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:security_policy => nil, # HACK NoSecurity requires OpenSSL. AlmostNo? Low?
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:wrappers => true,
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}
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##
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# Creates a new installer instance.
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#
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# Options are:
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# :cache_dir:: Alternate repository path to store .gem files in.
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# :domain:: :local, :remote, or :both. :local only searches gems in the
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# current directory. :remote searches only gems in Gem::sources.
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# :both searches both.
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# :env_shebang:: See Gem::Installer::new.
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# :force:: See Gem::Installer#install.
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# :format_executable:: See Gem::Installer#initialize.
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# :ignore_dependencies:: Don't install any dependencies.
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# :install_dir:: See Gem::Installer#install.
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# :prerelease:: Allow prerelease versions
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# :security_policy:: See Gem::Installer::new and Gem::Security.
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# :user_install:: See Gem::Installer.new
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# :wrappers:: See Gem::Installer::new
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def initialize(options = {})
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if options[:install_dir] then
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spec_dir = options[:install_dir], 'specifications'
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@source_index = Gem::SourceIndex.from_gems_in spec_dir
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else
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@source_index = Gem.source_index
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end
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options = DEFAULT_OPTIONS.merge options
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@bin_dir = options[:bin_dir]
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@development = options[:development]
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@domain = options[:domain]
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@env_shebang = options[:env_shebang]
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@force = options[:force]
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@format_executable = options[:format_executable]
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@ignore_dependencies = options[:ignore_dependencies]
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@prerelease = options[:prerelease]
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@security_policy = options[:security_policy]
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@user_install = options[:user_install]
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@wrappers = options[:wrappers]
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@installed_gems = []
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@install_dir = options[:install_dir] || Gem.dir
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@cache_dir = options[:cache_dir] || @install_dir
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end
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##
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# Returns a list of pairs of gemspecs and source_uris that match
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# Gem::Dependency +dep+ from both local (Dir.pwd) and remote (Gem.sources)
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# sources. Gems are sorted with newer gems prefered over older gems, and
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# local gems preferred over remote gems.
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def find_gems_with_sources(dep)
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gems_and_sources = []
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if @domain == :both or @domain == :local then
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Dir[File.join(Dir.pwd, "#{dep.name}-[0-9]*.gem")].each do |gem_file|
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spec = Gem::Format.from_file_by_path(gem_file).spec
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gems_and_sources << [spec, gem_file] if spec.name == dep.name
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end
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end
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if @domain == :both or @domain == :remote then
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begin
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requirements = dep.version_requirements.requirements.map do |req, ver|
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req
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end
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all = !@prerelease && (requirements.length > 1 ||
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(requirements.first != ">=" and requirements.first != ">"))
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found = Gem::SpecFetcher.fetcher.fetch dep, all, true, @prerelease
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gems_and_sources.push(*found)
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rescue Gem::RemoteFetcher::FetchError => e
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if Gem.configuration.really_verbose then
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say "Error fetching remote data:\t\t#{e.message}"
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say "Falling back to local-only install"
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end
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@domain = :local
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end
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end
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gems_and_sources.sort_by do |gem, source|
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[gem, source =~ /^http:\/\// ? 0 : 1] # local gems win
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end
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end
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##
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# Gathers all dependencies necessary for the installation from local and
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# remote sources unless the ignore_dependencies was given.
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def gather_dependencies
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specs = @specs_and_sources.map { |spec,_| spec }
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dependency_list = Gem::DependencyList.new
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dependency_list.add(*specs)
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unless @ignore_dependencies then
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to_do = specs.dup
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seen = {}
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until to_do.empty? do
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spec = to_do.shift
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next if spec.nil? or seen[spec.name]
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seen[spec.name] = true
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deps = spec.runtime_dependencies
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deps |= spec.development_dependencies if @development
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deps.each do |dep|
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results = find_gems_with_sources(dep).reverse
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results.reject! do |dep_spec,|
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to_do.push dep_spec
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@source_index.any? do |_, installed_spec|
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dep.name == installed_spec.name and
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dep.version_requirements.satisfied_by? installed_spec.version
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end
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end
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results.each do |dep_spec, source_uri|
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next if seen[dep_spec.name]
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@specs_and_sources << [dep_spec, source_uri]
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dependency_list.add dep_spec
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end
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end
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end
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end
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@gems_to_install = dependency_list.dependency_order.reverse
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end
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##
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# Finds a spec and the source_uri it came from for gem +gem_name+ and
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# +version+. Returns an Array of specs and sources required for
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# installation of the gem.
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def find_spec_by_name_and_version gem_name, version = Gem::Requirement.default
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spec_and_source = nil
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glob = if File::ALT_SEPARATOR then
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gem_name.gsub File::ALT_SEPARATOR, File::SEPARATOR
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else
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gem_name
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end
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local_gems = Dir["#{glob}*"].sort.reverse
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unless local_gems.empty? then
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local_gems.each do |gem_file|
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next unless gem_file =~ /gem$/
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begin
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spec = Gem::Format.from_file_by_path(gem_file).spec
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spec_and_source = [spec, gem_file]
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break
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rescue SystemCallError, Gem::Package::FormatError
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end
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end
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end
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if spec_and_source.nil? then
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dep = Gem::Dependency.new gem_name, version
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spec_and_sources = find_gems_with_sources(dep).reverse
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spec_and_source = spec_and_sources.find { |spec, source|
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Gem::Platform.match spec.platform
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}
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end
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if spec_and_source.nil? then
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raise Gem::GemNotFoundException,
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"could not find gem #{gem_name} locally or in a repository"
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end
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@specs_and_sources = [spec_and_source]
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end
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##
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# Installs the gem and all its dependencies. Returns an Array of installed
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# gems specifications.
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def install dep_or_name, version = Gem::Requirement.default
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if String === dep_or_name then
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find_spec_by_name_and_version dep_or_name, version
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else
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@specs_and_sources = [find_gems_with_sources(dep_or_name).last]
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end
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@installed_gems = []
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gather_dependencies
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@gems_to_install.each do |spec|
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last = spec == @gems_to_install.last
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# HACK is this test for full_name acceptable?
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next if @source_index.any? { |n,_| n == spec.full_name } and not last
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# TODO: make this sorta_verbose so other users can benefit from it
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say "Installing gem #{spec.full_name}" if Gem.configuration.really_verbose
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_, source_uri = @specs_and_sources.assoc spec
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begin
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local_gem_path = Gem::RemoteFetcher.fetcher.download spec, source_uri,
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@cache_dir
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rescue Gem::RemoteFetcher::FetchError
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next if @force
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raise
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end
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inst = Gem::Installer.new local_gem_path,
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:bin_dir => @bin_dir,
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:development => @development,
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:env_shebang => @env_shebang,
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:force => @force,
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:format_executable => @format_executable,
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:ignore_dependencies => @ignore_dependencies,
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:install_dir => @install_dir,
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:security_policy => @security_policy,
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:source_index => @source_index,
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:user_install => @user_install,
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:wrappers => @wrappers
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spec = inst.install
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@installed_gems << spec
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end
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@installed_gems
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end
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end
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