/usr/lib/ruby/vendor_ruby/mixlib/versioning/format/semver.rb is in ruby-mixlib-versioning 1.1.0-1.
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# Author:: Seth Chisamore (<schisamo@chef.io>)
# Author:: Christopher Maier (<cm@chef.io>)
# Copyright:: Copyright (c) 2013 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
module Mixlib
class Versioning
class Format
# Handles version strings based on {http://semver.org/ SemVer 2.0.0-rc.1}.
#
# SUPPORTED FORMATS
# -----------------
# ```text
# MAJOR.MINOR.PATCH
# MAJOR.MINOR.PATCH-PRERELEASE
# MAJOR.MINOR.PATCH-PRERELEASE+BUILD
# ```
#
# EXAMPLES
# --------
# ```text
# 11.0.0
# 11.0.0-alpha.1
# 11.0.0-alpha1+20121218164140
# 11.0.0-alpha1+20121218164140.git.207.694b062
# ```
#
# @author Seth Chisamore (<schisamo@chef.io>)
# @author Christopher Maier (<cm@chef.io>)
class SemVer < Format
SEMVER_REGEX = /^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][a-zA-Z0-9-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][a-zA-Z0-9-]*))*))?(?:\+([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?$/
# @see Format#parse
def parse(version_string)
match = version_string.match(SEMVER_REGEX) rescue nil
unless match
fail Mixlib::Versioning::ParseError, "'#{version_string}' is not a valid #{self.class} version string!"
end
@major, @minor, @patch, @prerelease, @build = match[1..5]
@major, @minor, @patch = [@major, @minor, @patch].map(&:to_i)
@prerelease = nil if @prerelease.nil? || @prerelease.empty?
@build = nil if @build.nil? || @build.empty?
end
end # class SemVer
end # class Format
end # module Versioning
end # module Mixlib
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