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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 eql?(other)
package.eql?(other.package) &&
range.eql?(other.range)
end
def ==(other)
package == other.package && range == 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
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