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##
# A set of gems for installation sourced from remote sources and local .gem
# files
class Gem::Resolver::InstallerSet < Gem::Resolver::Set
##
# List of Gem::Specification objects that must always be installed.
attr_reader :always_install # :nodoc:
##
# Only install gems in the always_install list
attr_accessor :ignore_dependencies # :nodoc:
##
# 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 # :nodoc:
##
# The remote_set looks up remote gems for installation.
attr_reader :remote_set # :nodoc:
##
# Creates a new InstallerSet that will look for gems in +domain+.
def initialize domain
super()
@domain = domain
@remote = consider_remote?
@f = Gem::SpecFetcher.fetcher
@always_install = []
@ignore_dependencies = false
@ignore_installed = false
@local = {}
@remote_set = Gem::Resolver::BestSet.new
@specs = {}
end
##
# Looks up the latest specification for +dependency+ and adds it to the
# always_install list.
def add_always_install dependency
request = Gem::Resolver::DependencyRequest.new dependency, nil
found = find_all request
found.delete_if { |s| s.version.prerelease? } unless dependency.prerelease?
found = found.select do |s|
Gem::Source::SpecificFile === s.source or
Gem::Platform::RUBY == s.platform or
Gem::Platform.local === s.platform
end
if found.empty? then
exc = Gem::UnsatisfiableDependencyError.new request
exc.errors = errors
raise exc
end
newest = found.max_by do |s|
[s.version, s.platform == Gem::Platform::RUBY ? -1 : 1]
end
@always_install << newest.spec
end
##
# Adds a local gem requested using +dep_name+ with the given +spec+ that can
# be loaded and installed using the +source+.
def add_local dep_name, spec, source
@local[dep_name] = [spec, source]
end
##
# Should local gems should be considered?
def consider_local? # :nodoc:
@domain == :both or @domain == :local
end
##
# Should remote gems should be considered?
def consider_remote? # :nodoc:
@domain == :both or @domain == :remote
end
##
# Errors encountered while resolving gems
def errors
@errors + @remote_set.errors
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.any? { |spec| spec.name == gemspec.name }
res << Gem::Resolver::InstalledSpecification.new(self, gemspec)
end unless @ignore_installed
if consider_local? then
matching_local = @local.values.select do |spec, _|
req.matches_spec? spec
end.map do |spec, source|
Gem::Resolver::LocalSpecification.new self, spec, source
end
res.concat matching_local
local_source = Gem::Source::Local.new
if spec = local_source.find_gem(name, dep.requirement) then
res << Gem::Resolver::IndexSpecification.new(
self, spec.name, spec.version, local_source, spec.platform)
end
end
res.concat @remote_set.find_all req if consider_remote?
res
end
def prefetch(reqs)
@remote_set.prefetch(reqs)
end
def inspect # :nodoc:
always_install = @always_install.map { |s| s.full_name }
'#<%s domain: %s specs: %p always install: %p>' % [
self.class, @domain, @specs.keys, always_install,
]
end
##
# Called from IndexSpecification to get a true Specification
# object.
def load_spec name, ver, platform, source # :nodoc:
key = "#{name}-#{ver}-#{platform}"
@specs.fetch key do
tuple = Gem::NameTuple.new name, ver, platform
@specs[key] = source.fetch_spec tuple
end
end
##
# Has a local gem for +dep_name+ been added to this set?
def local? dep_name # :nodoc:
spec, = @local[dep_name]
spec
end
def pretty_print q # :nodoc:
q.group 2, '[InstallerSet', ']' do
q.breakable
q.text "domain: #{@domain}"
q.breakable
q.text 'specs: '
q.pp @specs.keys
q.breakable
q.text 'always install: '
q.pp @always_install
end
end
def remote= remote # :nodoc:
case @domain
when :local then
@domain = :both if remote
when :remote then
@domain = nil unless remote
when :both then
@domain = :local unless remote
end
end
end
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