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# frozen_string_literal: true
module Gem
class SpecificationRecord
def self.dirs_from(paths)
paths.map do |path|
File.join(path, "specifications")
end
end
def self.from_path(path)
new(dirs_from([path]))
end
def initialize(dirs)
@all = nil
@stubs = nil
@stubs_by_name = {}
@spec_with_requirable_file = {}
@active_stub_with_requirable_file = {}
@dirs = dirs
end
# Sentinel object to represent "not found" stubs
NOT_FOUND = Struct.new(:to_spec, :this).new
private_constant :NOT_FOUND
##
# Returns the list of all specifications in the record
def all
@all ||= Gem.loaded_specs.values | stubs.map(&:to_spec)
end
##
# Returns a Gem::StubSpecification for every specification in the record
def stubs
@stubs ||= begin
pattern = "*.gemspec"
stubs = stubs_for_pattern(pattern, false)
@stubs_by_name = stubs.select {|s| Gem::Platform.match_spec? s }.group_by(&:name)
stubs
end
end
##
# Returns a Gem::StubSpecification for every specification in the record
# named +name+ only returns stubs that match Gem.platforms
def stubs_for(name)
if @stubs
@stubs_by_name[name] || []
else
@stubs_by_name[name] ||= stubs_for_pattern("#{name}-*.gemspec").select do |s|
s.name == name
end
end
end
##
# Finds stub specifications matching a pattern in the record, optionally
# filtering out specs not matching the current platform
def stubs_for_pattern(pattern, match_platform = true)
installed_stubs = installed_stubs(pattern)
installed_stubs.select! {|s| Gem::Platform.match_spec? s } if match_platform
stubs = installed_stubs + Gem::Specification.default_stubs(pattern)
stubs = stubs.uniq(&:full_name)
Gem::Specification._resort!(stubs)
stubs
end
##
# Adds +spec+ to the the record, keeping the collection properly sorted.
def add_spec(spec)
return if all.include? spec
all << spec
stubs << spec
(@stubs_by_name[spec.name] ||= []) << spec
Gem::Specification._resort!(@stubs_by_name[spec.name])
Gem::Specification._resort!(stubs)
end
##
# Removes +spec+ from the record.
def remove_spec(spec)
all.delete spec.to_spec
stubs.delete spec
(@stubs_by_name[spec.name] || []).delete spec
end
##
# Sets the specs known by the record to +specs+.
def all=(specs)
@stubs_by_name = specs.group_by(&:name)
@all = @stubs = specs
end
##
# Return full names of all specs in the record in sorted order.
def all_names
all.map(&:full_name)
end
##
# Return the best specification in the record that contains the file matching +path+.
def find_by_path(path)
path = path.dup.freeze
spec = @spec_with_requirable_file[path] ||= stubs.find do |s|
s.contains_requirable_file? path
end || NOT_FOUND
spec.to_spec
end
##
# Return the best specification in the record that contains the file
# matching +path+ amongst the specs that are not activated.
def find_inactive_by_path(path)
stub = stubs.find do |s|
next if s.activated?
s.contains_requirable_file? path
end
stub&.to_spec
end
##
# Return the best specification in the record that contains the file
# matching +path+, among those already activated.
def find_active_stub_by_path(path)
stub = @active_stub_with_requirable_file[path] ||= stubs.find do |s|
s.activated? && s.contains_requirable_file?(path)
end || NOT_FOUND
stub.this
end
##
# Return the latest specs in the record, optionally including prerelease
# specs if +prerelease+ is true.
def latest_specs(prerelease)
Gem::Specification._latest_specs stubs, prerelease
end
##
# Return the latest installed spec in the record for gem +name+.
def latest_spec_for(name)
latest_specs(true).find {|installed_spec| installed_spec.name == name }
end
private
def installed_stubs(pattern)
map_stubs(pattern) do |path, base_dir, gems_dir|
Gem::StubSpecification.gemspec_stub(path, base_dir, gems_dir)
end
end
def map_stubs(pattern)
@dirs.flat_map do |dir|
base_dir = File.dirname dir
gems_dir = File.join base_dir, "gems"
Gem::Specification.gemspec_stubs_in(dir, pattern) {|path| yield path, base_dir, gems_dir }
end
end
end
end
|
