require 'rubygems/command'
require 'rubygems/local_remote_options'
require 'rubygems/version_option'
class Gem::Commands::DependencyCommand < Gem::Command
include Gem::LocalRemoteOptions
include Gem::VersionOption
def initialize
super 'dependency',
'Show the dependencies of an installed gem',
:version => Gem::Requirement.default, :domain => :local
add_version_option
add_platform_option
add_prerelease_option
add_option('-R', '--[no-]reverse-dependencies',
'Include reverse dependencies in the output') do
|value, options|
options[:reverse_dependencies] = value
end
add_option('-p', '--pipe',
"Pipe Format (name --version ver)") do |value, options|
options[:pipe_format] = value
end
add_local_remote_options
end
def arguments # :nodoc:
"GEMNAME name of gem to show dependencies for"
end
def defaults_str # :nodoc:
"--local --version '#{Gem::Requirement.default}' --no-reverse-dependencies"
end
def usage # :nodoc:
"#{program_name} GEMNAME"
end
def execute
if options[:reverse_dependencies] and remote? and not local? then
alert_error 'Only reverse dependencies for local gems are supported.'
terminate_interaction 1
end
options[:args] << '' if options[:args].empty?
pattern = if options[:args].length == 1 and
options[:args].first =~ /\A\/(.*)\/(i)?\z/m then
flags = $2 ? Regexp::IGNORECASE : nil
Regexp.new $1, flags
else
/\A#{Regexp.union(*options[:args])}/
end
# TODO: deprecate for real damnit
dependency = Gem::Deprecate.skip_during {
Gem::Dependency.new pattern, options[:version]
}
dependency.prerelease = options[:prerelease]
specs = []
specs.concat dependency.matching_specs if local?
if remote? and not options[:reverse_dependencies] then
fetcher = Gem::SpecFetcher.fetcher
# REFACTOR: fetcher.find_specs_matching => specs
specs_and_sources = fetcher.find_matching(dependency,
dependency.specific?, true,
dependency.prerelease?)
specs.concat specs_and_sources.map { |spec_tuple, source_uri|
fetcher.fetch_spec spec_tuple, URI.parse(source_uri)
}
end
if specs.empty? then
patterns = options[:args].join ','
say "No gems found matching #{patterns} (#{options[:version]})" if
Gem.configuration.verbose
terminate_interaction 1
end
specs = specs.uniq.sort
reverse = Hash.new { |h, k| h[k] = [] }
if options[:reverse_dependencies] then
specs.each do |spec|
reverse[spec.full_name] = find_reverse_dependencies spec
end
end
if options[:pipe_format] then
specs.each do |spec|
unless spec.dependencies.empty?
spec.dependencies.sort_by { |dep| dep.name }.each do |dep|
say "#{dep.name} --version '#{dep.requirement}'"
end
end
end
else
response = ''
specs.each do |spec|
response << print_dependencies(spec)
unless reverse[spec.full_name].empty? then
response << " Used by\n"
reverse[spec.full_name].each do |sp, dep|
response << " #{sp} (#{dep})\n"
end
end
response << "\n"
end
say response
end
end
def print_dependencies(spec, level = 0)
response = ''
response << ' ' * level + "Gem #{spec.full_name}\n"
unless spec.dependencies.empty? then
spec.dependencies.sort_by { |dep| dep.name }.each do |dep|
response << ' ' * level + " #{dep}\n"
end
end
response
end
##
# Returns an Array of [specification, dep] that are satisfied by +spec+.
def find_reverse_dependencies(spec)
result = []
Gem::Specification.each do |sp|
sp.dependencies.each do |dep|
dep = Gem::Dependency.new(*dep) unless Gem::Dependency === dep
if spec.name == dep.name and
dep.requirement.satisfied_by?(spec.version) then
result << [sp.full_name, dep]
end
end
end
result
end
end
|