dependency_installer.rb [plain text]
require 'rubygems'
require 'rubygems/dependency_list'
require 'rubygems/package'
require 'rubygems/installer'
require 'rubygems/spec_fetcher'
require 'rubygems/user_interaction'
require 'rubygems/source_local'
require 'rubygems/source_specific_file'
require 'rubygems/available_set'
class Gem::DependencyInstaller
include Gem::UserInteraction
attr_reader :gems_to_install
attr_reader :installed_gems
attr_reader :document
DEFAULT_OPTIONS = {
:env_shebang => false,
:document => %w[ri],
:domain => :both, :force => false,
:format_executable => false, :ignore_dependencies => false,
:prerelease => false,
:security_policy => nil, :wrappers => true,
:build_args => nil,
:build_docs_in_background => false,
}.freeze
def initialize(options = {})
@install_dir = options[:install_dir] || Gem.dir
if options[:install_dir] then
Gem::Specification.dirs = @install_dir
end
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]
@minimal_deps = options[:minimal_deps]
@available = nil
@installed_gems = []
@toplevel_specs = nil
@cache_dir = options[:cache_dir] || @install_dir
@errors = nil
end
attr_reader :errors
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
def consider_local?
@domain == :both or @domain == :local
end
def consider_remote?
@domain == :both or @domain == :remote
end
def find_gems_with_sources(dep)
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
found, errors = Gem::SpecFetcher.fetcher.spec_for_dependency dep
if @errors
@errors += errors
else
@errors = errors
end
set << found
rescue Gem::RemoteFetcher::FetchError => e
if Gem.configuration.really_verbose then
say "Error fetching remote data:\t\t#{e.message}"
say "Falling back to local-only install"
end
@domain = :local
end
end
set
end
def gather_dependencies
specs = @available.all_specs
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
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 add_found_dependencies to_do, dependency_list
seen = {}
dependencies = Hash.new { |h, name| h[name] = Gem::Dependency.new name }
until to_do.empty? do
spec = to_do.shift
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
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)
set.match_platform!
end
if set.empty?
raise Gem::SpecificGemNotFoundException.new(gem_name, version, @errors)
end
@available = set
end
def install dep_or_name, version = Gem::Requirement.default
available_set_for dep_or_name, version
@installed_gems = []
gather_dependencies
last = @gems_to_install.size - 1
@gems_to_install.each_with_index do |spec, index|
next if Gem::Specification.include?(spec) and index != last
say "Installing gem #{spec.full_name}" if Gem.configuration.really_verbose
source = @available.source_for spec
begin
local_gem_path = source.download spec, @cache_dir
rescue Gem::RemoteFetcher::FetchError
next if @force
raise
end
if @development
if @dev_shallow
is_dev = @toplevel_specs.include? spec.full_name
else
is_dev = true
end
end
inst = Gem::Installer.new local_gem_path,
:bin_dir => @bin_dir,
:development => is_dev,
:env_shebang => @env_shebang,
:force => @force,
:format_executable => @format_executable,
:ignore_dependencies => @ignore_dependencies,
:install_dir => @install_dir,
:security_policy => @security_policy,
:user_install => @user_install,
:wrappers => @wrappers,
:build_args => @build_args
spec = inst.install
@installed_gems << spec
end
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 in_background what
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
end