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class SemVer
VERSION = /^v?(\d+)\.(\d+)\.(\d+)([A-Za-z][0-9A-Za-z-]*|)$/
SIMPLE_RANGE = /^v?(\d+|[xX])(?:\.(\d+|[xX])(?:\.(\d+|[xX]))?)?$/
include Comparable
def self.valid?(ver)
VERSION =~ ver
end
def self.find_matching(pattern, versions)
versions.select { |v| v.matched_by?("#{pattern}") }.sort.last
end
attr_reader :major, :minor, :tiny, :special
def initialize(ver)
unless SemVer.valid?(ver)
raise ArgumentError.new("Invalid version string '#{ver}'!")
end
@major, @minor, @tiny, @special = VERSION.match(ver).captures.map do |x|
# Because Kernel#Integer tries to interpret hex and octal strings, which
# we specifically do not want, and which cannot be overridden in 1.8.7.
Float(x).to_i rescue x
end
end
def <=>(other)
other = SemVer.new("#{other}") unless other.is_a? SemVer
return self.major <=> other.major unless self.major == other.major
return self.minor <=> other.minor unless self.minor == other.minor
return self.tiny <=> other.tiny unless self.tiny == other.tiny
return 0 if self.special == other.special
return 1 if self.special == ''
return -1 if other.special == ''
return self.special <=> other.special
end
def matched_by?(pattern)
# For the time being, this is restricted to exact version matches and
# simple range patterns. In the future, we should implement some or all of
# the comparison operators here:
# https://github.com/isaacs/node-semver/blob/d474801/semver.js#L340
case pattern
when SIMPLE_RANGE
pattern = SIMPLE_RANGE.match(pattern).captures
pattern[1] = @minor unless pattern[1] && pattern[1] !~ /x/i
pattern[2] = @tiny unless pattern[2] && pattern[2] !~ /x/i
[@major, @minor, @tiny] == pattern.map { |x| x.to_i }
when VERSION
self == SemVer.new(pattern)
else
false
end
end
def inspect
"v#{@major}.#{@minor}.#{@tiny}#{@special}"
end
alias :to_s :inspect
end
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