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class SpecVersion
# If beginning implementations have a problem with this include, we can
# manually implement the relational operators that are needed.
include Comparable
# SpecVersion handles comparison correctly for the context by filling in
# missing version parts according to the value of +ceil+. If +ceil+ is
# +false+, 0 digits fill in missing version parts. If +ceil+ is +true+, 9
# digits fill in missing parts. (See e.g. VersionGuard and BugGuard.)
def initialize(version, ceil = false)
@version = version
@ceil = ceil
@integer = nil
end
def to_s
@version
end
def to_str
to_s
end
# Converts a string representation of a version major.minor.tiny
# to an integer representation so that comparisons can be made. For example,
# "2.2.10" < "2.2.2" would be false if compared as strings.
def to_i
unless @integer
major, minor, tiny = @version.split "."
if @ceil
tiny = 99 unless tiny
end
parts = [major, minor, tiny].map { |x| x.to_i }
@integer = ("1%02d%02d%02d" % parts).to_i
end
@integer
end
def to_int
to_i
end
def <=>(other)
if other.respond_to? :to_int
other = Integer other
else
other = SpecVersion.new(String(other)).to_i
end
self.to_i <=> other
end
end
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