ruby/rubygems.req

82 lines
2.5 KiB
Plaintext
Raw Normal View History

#!/usr/bin/ruby
require 'rubygems/package'
module RubyGemsReq
module Helpers
# Expands '~>' and '!=' gem requirements.
def self.expand_requirement(requirements)
requirements.inject([]) do |output, r|
output.concat case r.first
when '~>'
expand_pessimistic_requirement(r)
when '!='
expand_not_equal_requirement(r)
else
[r]
end
end
end
# Expands the pessimistic version operator '~>' into equivalent '>=' and
# '<' pair.
def self.expand_pessimistic_requirement(requirement)
next_version = Gem::Version.create(requirement.last).bump
return ['>=', requirement.last], ['<', next_version]
end
# Expands the not equal version operator '!=' into equivalent '<' and
# '>' pair.
def self.expand_not_equal_requirement(requirement)
return ['<', requirement.last], ['>', requirement.last]
end
# Converts Gem::Requirement into array of requirements strings compatible
# with RPM .spec file.
def self.requirement_versions_to_rpm(requirement)
self.expand_requirement(requirement.requirements).map do |op, version|
version == Gem::Version.new(0) ? "" : "#{op} #{version}"
end
end
end
# Report RubyGems dependency, versioned if required.
def self.rubygems_dependency(specification)
Helpers::requirement_versions_to_rpm(specification.required_rubygems_version).each do |requirement|
dependency_string = "ruby(rubygems)"
dependency_strint += " #{specification.required_rubygems_version}" if requirement && requirement.length > 0
puts dependency_string
end
end
# Report all gem dependencies including their version.
def self.gem_depenencies(specification)
specification.runtime_dependencies.each do |dependency|
Helpers::requirement_versions_to_rpm(dependency.requirement).each do |requirement|
dependency_string = "rubygem(#{dependency.name})"
dependency_string += " #{requirement}" if requirement && requirement.length > 0
puts dependency_string
end
end
end
# Reports all requirements specified by all provided .gemspec files.
def self.requires
while filename = gets
filename.strip!
begin
specification = Gem::Specification.load filename
rubygems_dependency(specification)
gem_depenencies(specification)
rescue => e
# Ignore all errors.
end
end
end
end
if __FILE__ == $0
RubyGemsReq::requires
end