Gem::DependencyList is used for installing and uninstalling gems in the correct order to avoid conflicts.
Allows enabling/disabling use of development dependencies
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 34
def self.from_specs
list = new
list.add(*Gem::Specification.to_a)
list
end
Creates a DependencyList from the current specs.
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 44
def initialize(development = false)
@specs = []
@development = development
end
Creates a new DependencyList. If development is true, development dependencies will be included.
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 240
def active_count(specs, ignored)
specs.count {|spec| ignored[spec.full_name].nil? }
end
Count the number of gemspecs in the list specs that are not in ignored.
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 53
def add(*gemspecs)
@specs.concat gemspecs
end
Adds gemspecs to the dependency list.
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 57
def clear
@specs.clear
end
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 76
def dependency_order
sorted = strongly_connected_components.flatten
result = []
seen = {}
sorted.each do |spec|
if index = seen[spec.name]
if result[index].version < spec.version
result[index] = spec
end
else
seen[spec.name] = result.length
result << spec
end
end
result.reverse
end
Return a list of the gem specifications in the dependency list, sorted in order so that no gemspec in the list depends on a gemspec earlier in the list.
This is useful when removing gems from a set of installed gems. By removing them in the returned order, you don’t get into as many dependency issues.
If there are circular dependencies (yuck!), then gems will be returned in order until only the circular dependents and anything they reference are left. Then arbitrary gemspecs will be returned until the circular dependency is broken, after which gems will be returned in dependency order again.
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 99
def each(&block)
dependency_order.each(&block)
end
Iterator over dependency_order
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 103
def find_name(full_name)
@specs.find {|spec| spec.full_name == full_name }
end
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 114
def ok?
why_not_ok?(:quick).empty?
end
Are all the dependencies in the list satisfied?
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 143
def ok_to_remove?(full_name, check_dev=true)
gem_to_remove = find_name full_name
# If the state is inconsistent, at least don't crash
return true unless gem_to_remove
siblings = @specs.find_all do |s|
s.name == gem_to_remove.name &&
s.full_name != gem_to_remove.full_name
end
deps = []
@specs.each do |spec|
check = check_dev ? spec.dependencies : spec.runtime_dependencies
check.each do |dep|
deps << dep if gem_to_remove.satisfies_requirement?(dep)
end
end
deps.all? do |dep|
siblings.any? do |s|
s.satisfies_requirement? dep
end
end
end
It is ok to remove a gemspec from the dependency list?
If removing the gemspec creates breaks a currently ok dependency, then it is NOT ok to remove the gemspec.
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 186
def remove_by_name(full_name)
@specs.delete_if {|spec| spec.full_name == full_name }
end
Removes the gemspec matching full_name from the dependency list
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 176
def remove_specs_unsatisfied_by(dependencies)
specs.reject! do |spec|
dep = dependencies[spec.name]
dep && !dep.requirement.satisfied_by?(spec.version)
end
end
Remove everything in the DependencyList that matches but doesn’t satisfy items in dependencies (a hash of gem names to arrays of dependencies).
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 194
def spec_predecessors
result = Hash.new {|h,k| h[k] = [] }
specs = @specs.sort.reverse
specs.each do |spec|
specs.each do |other|
next if spec == other
other.dependencies.each do |dep|
if spec.satisfies_requirement? dep
result[spec] << other
end
end
end
end
result
end
Return a hash of predecessors. result[spec] is an Array of gemspecs that have a dependency satisfied by the named gemspec.
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 218
def tsort_each_child(node)
specs = @specs.sort.reverse
dependencies = node.runtime_dependencies
dependencies.push(*node.development_dependencies) if @development
dependencies.each do |dep|
specs.each do |spec|
if spec.satisfies_requirement? dep
yield spec
break
end
end
end
end
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 214
def tsort_each_node(&block)
@specs.each(&block)
end
# File tmp/rubies/ruby-3.3.0/lib/rubygems/dependency_list.rb, line 118
def why_not_ok?(quick = false)
unsatisfied = Hash.new {|h,k| h[k] = [] }
each do |spec|
spec.runtime_dependencies.each do |dep|
inst = Gem::Specification.any? do |installed_spec|
dep.name == installed_spec.name &&
dep.requirement.satisfied_by?(installed_spec.version)
end
unless inst || @specs.find {|s| s.satisfies_requirement? dep }
unsatisfied[spec.name] << dep
return unsatisfied if quick
end
end
end
unsatisfied
end