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Diffstat (limited to 'trunk/lib/rubygems/dependency_list.rb')
| -rw-r--r-- | trunk/lib/rubygems/dependency_list.rb | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/trunk/lib/rubygems/dependency_list.rb b/trunk/lib/rubygems/dependency_list.rb deleted file mode 100644 index a129743914..0000000000 --- a/trunk/lib/rubygems/dependency_list.rb +++ /dev/null @@ -1,165 +0,0 @@ -#-- -# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. -# All rights reserved. -# See LICENSE.txt for permissions. -#++ - -require 'tsort' - -class Gem::DependencyList - - include TSort - - def self.from_source_index(src_index) - deps = new - - src_index.each do |full_name, spec| - deps.add spec - end - - deps - end - - def initialize - @specs = [] - end - - # Adds +gemspecs+ to the dependency list. - def add(*gemspecs) - @specs.push(*gemspecs) - end - - # Return a list of the specifications in the dependency list, - # sorted in order so that no spec in the list depends on a gem - # 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. - def dependency_order - sorted = strongly_connected_components.flatten - - result = [] - seen = {} - - sorted.each do |spec| - if index = seen[spec.name] then - if result[index].version < spec.version then - result[index] = spec - end - else - seen[spec.name] = result.length - result << spec - end - end - - result.reverse - end - - def find_name(full_name) - @specs.find { |spec| spec.full_name == full_name } - end - - # Are all the dependencies in the list satisfied? - def ok? - @specs.all? do |spec| - spec.runtime_dependencies.all? do |dep| - @specs.find { |s| s.satisfies_requirement? dep } - end - end - end - - # Is is ok to remove a gem from the dependency list? - # - # If removing the gemspec creates breaks a currently ok dependency, - # then it is NOT ok to remove the gem. - def ok_to_remove?(full_name) - gem_to_remove = find_name full_name - - siblings = @specs.find_all { |s| - s.name == gem_to_remove.name && - s.full_name != gem_to_remove.full_name - } - - deps = [] - - @specs.each do |spec| - spec.dependencies.each do |dep| - deps << dep if gem_to_remove.satisfies_requirement?(dep) - end - end - - deps.all? { |dep| - siblings.any? { |s| - s.satisfies_requirement? dep - } - } - end - - def remove_by_name(full_name) - @specs.delete_if { |spec| spec.full_name == full_name } - end - - # Return a hash of predecessors. <tt>result[spec]</tt> is an - # Array of gemspecs that have a dependency satisfied by the named - # spec. - 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 then - result[spec] << other - end - end - end - end - - result - end - - def tsort_each_node(&block) - @specs.each(&block) - end - - def tsort_each_child(node, &block) - specs = @specs.sort.reverse - - node.dependencies.each do |dep| - specs.each do |spec| - if spec.satisfies_requirement? dep then - begin - yield spec - rescue TSort::Cyclic - end - break - end - end - end - end - - private - - # Count the number of gemspecs in the list +specs+ that are not in - # +ignored+. - def active_count(specs, ignored) - result = 0 - specs.each do |spec| - result += 1 unless ignored[spec.full_name] - end - result - end - -end - |