diff options
Diffstat (limited to 'lib/bundler/vendor/pub_grub/lib/pub_grub/version_constraint.rb')
-rw-r--r-- | lib/bundler/vendor/pub_grub/lib/pub_grub/version_constraint.rb | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/lib/bundler/vendor/pub_grub/lib/pub_grub/version_constraint.rb b/lib/bundler/vendor/pub_grub/lib/pub_grub/version_constraint.rb new file mode 100644 index 0000000000..b71f3eaf53 --- /dev/null +++ b/lib/bundler/vendor/pub_grub/lib/pub_grub/version_constraint.rb @@ -0,0 +1,129 @@ +require_relative 'version_range' + +module Bundler::PubGrub + class VersionConstraint + attr_reader :package, :range + + # @param package [Bundler::PubGrub::Package] + # @param range [Bundler::PubGrub::VersionRange] + def initialize(package, range: nil) + @package = package + @range = range + end + + def hash + package.hash ^ range.hash + end + + def ==(other) + package == other.package && + range == other.range + end + + def eql?(other) + package.eql?(other.package) && + range.eql?(other.range) + end + + class << self + def exact(package, version) + range = VersionRange.new(min: version, max: version, include_min: true, include_max: true) + new(package, range: range) + end + + def any(package) + new(package, range: VersionRange.any) + end + + def empty(package) + new(package, range: VersionRange.empty) + end + end + + def intersect(other) + unless package == other.package + raise ArgumentError, "Can only intersect between VersionConstraint of the same package" + end + + self.class.new(package, range: range.intersect(other.range)) + end + + def union(other) + unless package == other.package + raise ArgumentError, "Can only intersect between VersionConstraint of the same package" + end + + self.class.new(package, range: range.union(other.range)) + end + + def invert + new_range = range.invert + self.class.new(package, range: new_range) + end + + def difference(other) + intersect(other.invert) + end + + def allows_all?(other) + range.allows_all?(other.range) + end + + def allows_any?(other) + range.intersects?(other.range) + end + + def subset?(other) + other.allows_all?(self) + end + + def overlap?(other) + other.allows_any?(self) + end + + def disjoint?(other) + !overlap?(other) + end + + def relation(other) + if subset?(other) + :subset + elsif overlap?(other) + :overlap + else + :disjoint + end + end + + def to_s(allow_every: false) + if Package.root?(package) + package.to_s + elsif allow_every && any? + "every version of #{package}" + else + "#{package} #{constraint_string}" + end + end + + def constraint_string + if any? + ">= 0" + else + range.to_s + end + end + + def empty? + range.empty? + end + + # Does this match every version of the package + def any? + range.any? + end + + def inspect + "#<#{self.class} #{self}>" + end + end +end |