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Diffstat (limited to 'trunk/lib/rubygems/requirement.rb')
-rw-r--r-- | trunk/lib/rubygems/requirement.rb | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/trunk/lib/rubygems/requirement.rb b/trunk/lib/rubygems/requirement.rb deleted file mode 100644 index c9128b5ebc..0000000000 --- a/trunk/lib/rubygems/requirement.rb +++ /dev/null @@ -1,163 +0,0 @@ -#-- -# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. -# All rights reserved. -# See LICENSE.txt for permissions. -#++ - -require 'rubygems/version' - -## -# Requirement version includes a prefaced comparator in addition -# to a version number. -# -# A Requirement object can actually contain multiple, er, -# requirements, as in (> 1.2, < 2.0). - -class Gem::Requirement - - include Comparable - - attr_reader :requirements - - OPS = { - "=" => lambda { |v, r| v == r }, - "!=" => lambda { |v, r| v != r }, - ">" => lambda { |v, r| v > r }, - "<" => lambda { |v, r| v < r }, - ">=" => lambda { |v, r| v >= r }, - "<=" => lambda { |v, r| v <= r }, - "~>" => lambda { |v, r| v >= r && v < r.bump } - } - - OP_RE = /#{OPS.keys.map{ |k| Regexp.quote k }.join '|'}/o - - ## - # Factory method to create a Gem::Requirement object. Input may be a - # Version, a String, or nil. Intended to simplify client code. - # - # If the input is "weird", the default version requirement is returned. - - def self.create(input) - case input - when Gem::Requirement then - input - when Gem::Version, Array then - new input - else - if input.respond_to? :to_str then - self.new [input.to_str] - else - self.default - end - end - end - - ## - # A default "version requirement" can surely _only_ be '>= 0'. - #-- - # This comment once said: - # - # "A default "version requirement" can surely _only_ be '> 0'." - - def self.default - self.new ['>= 0'] - end - - ## - # Constructs a Requirement from +requirements+ which can be a String, a - # Gem::Version, or an Array of those. See parse for details on the - # formatting of requirement strings. - - def initialize(requirements) - @requirements = case requirements - when Array then - requirements.map do |requirement| - parse(requirement) - end - else - [parse(requirements)] - end - @version = nil # Avoid warnings. - end - - ## - # Marshal raw requirements, rather than the full object - - def marshal_dump # :nodoc: - [@requirements] - end - - ## - # Load custom marshal format - - def marshal_load(array) # :nodoc: - @requirements = array[0] - @version = nil - end - - def to_s # :nodoc: - as_list.join(", ") - end - - def as_list - normalize - @requirements.collect { |req| - "#{req[0]} #{req[1]}" - } - end - - def normalize - return if not defined? @version or @version.nil? - @requirements = [parse(@version)] - @nums = nil - @version = nil - @op = nil - end - - ## - # True if this requirement satisfied by the Gem::Version +version+. - - def satisfied_by?(version) - normalize - @requirements.all? { |op, rv| satisfy?(op, version, rv) } - end - - ## - # Is "+version+ +op+ +required_version+" satisfied? - - def satisfy?(op, version, required_version) - OPS[op].call(version, required_version) - end - - ## - # Parse the version requirement obj returning the operator and version. - # - # The requirement can be a String or a Gem::Version. A String can be an - # operator (<, <=, =, =>, >, !=, ~>), a version number, or both, operator - # first. - - def parse(obj) - case obj - when /^\s*(#{OP_RE})\s*([0-9.]+)\s*$/o then - [$1, Gem::Version.new($2)] - when /^\s*([0-9.]+)\s*$/ then - ['=', Gem::Version.new($1)] - when /^\s*(#{OP_RE})\s*$/o then - [$1, Gem::Version.new('0')] - when Gem::Version then - ['=', obj] - else - fail ArgumentError, "Illformed requirement [#{obj.inspect}]" - end - end - - def <=>(other) # :nodoc: - to_s <=> other.to_s - end - - def hash # :nodoc: - to_s.hash - end - -end - |