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class Gem::DependencyResolver::InstallerSet
##
# List of Gem::Specification objects that must always be installed.
attr_reader :always_install
##
# Only install gems in the always_install list
attr_accessor :ignore_dependencies
##
# Do not look in the installed set when finding specifications. This is
# used by the --install-dir option to `gem install`
attr_accessor :ignore_installed
def initialize domain
@domain = domain
@f = Gem::SpecFetcher.fetcher
@all = Hash.new { |h,k| h[k] = [] }
@always_install = []
@ignore_dependencies = false
@ignore_installed = false
@loaded_remote_specs = []
@specs = {}
end
##
# Should local gems should be considered?
def consider_local?
@domain == :both or @domain == :local
end
##
# Should remote gems should be considered?
def consider_remote?
@domain == :both or @domain == :remote
end
##
# Returns an array of IndexSpecification objects matching DependencyRequest
# +req+.
def find_all req
res = []
dep = req.dependency
return res if @ignore_dependencies and
@always_install.none? { |spec| dep.matches_spec? spec }
name = dep.name
dep.matching_specs.each do |gemspec|
next if @always_install.include? gemspec
res << Gem::DependencyResolver::InstalledSpecification.new(self, gemspec)
end unless @ignore_installed
if consider_local? then
local_source = Gem::Source::Local.new
if spec = local_source.find_gem(name, dep.requirement) then
res << Gem::DependencyResolver::IndexSpecification.new(
self, spec.name, spec.version, local_source, spec.platform)
end
end
if consider_remote? then
load_remote_specs dep
@all[name].each do |remote_source, n|
if dep.match? n then
res << Gem::DependencyResolver::IndexSpecification.new(
self, n.name, n.version, remote_source, n.platform)
end
end
end
res
end
def inspect # :nodoc:
'#<%s domain: %s specs: %p>' % [ self.class, @domain, @specs.keys ]
end
##
# Loads remote prerelease specs if +dep+ is a prerelease dependency
def load_remote_specs dep
types = [:released]
types << :prerelease if dep.prerelease?
types.each do |type|
next if @loaded_remote_specs.include? type
@loaded_remote_specs << type
list, = @f.available_specs type
list.each do |uri, specs|
specs.each do |n|
@all[n.name] << [uri, n]
end
end
end
end
##
# Called from IndexSpecification to get a true Specification
# object.
def load_spec name, ver, platform, source
key = "#{name}-#{ver}-#{platform}"
@specs.fetch key do
tuple = Gem::NameTuple.new name, ver, platform
@specs[key] = source.fetch_spec tuple
end
end
##
# No prefetching needed since we load the whole index in initially.
def prefetch(reqs)
end
end
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