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class Version
VALID_VERSION_REGEXP = /\A\z|\A[0-9]+(\.[0-9]+)*\z/
include Comparable
def initialize(version = '')
unless VALID_VERSION_REGEXP.match(version.to_s)
raise ArgumentError, "Invalid version string '#{version}'"
end
@components = version.to_s
.split('.')
.map(&:to_i)
.reverse
.drop_while(&:zero?)
.reverse
end
def <=>(other)
@components <=> Version.new(other).components
end
def components(positions = 0)
padding_size = positions - @components.size
if padding_size > 0
@components + [0] * padding_size
elsif positions != 0
@components.take(positions)
else
@components.dup
end
end
def to_s
@components.join('.')
end
class Range
include Enumerable
def initialize(start_version, end_version)
@start_version = Version.new(start_version)
@end_version = Version.new(end_version)
end
def include?(version)
@start_version <= version && @end_version > version
end
def each
current_version = @start_version
while current_version < @end_version
yield current_version
current_version = increment_version(current_version)
end
end
private
def increment_version(version)
components = version.components(3)
components[2] += 1
components.to_enum.with_index.reverse_each do |_, index|
component = components[index]
if component >= 10 && components[index - 1]
components[index] = 0
components[index - 1] += 1
end
end
Version.new(components.join('.'))
end
end
end