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# Copyright:: Copyright 2017, Noah Kantrowitz
# 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 ChefUtils
# String-like object for version strings.
#
# @since 13.2
# @api internal
class VersionString < String
# Parsed version object for the string.
# @return [Gem::Version]
attr_reader :parsed_version
# Create a new VersionString from an input String.
#
# @param val [String] Version string to parse.
def initialize(val)
super
@parsed_version = ::Gem::Version.create(self)
end
# @!group Compat wrappers for String
# Compat wrapper for + to behave like a normal String.
#
# @param other [String]
# @return [String]
def +(other)
to_s + other
end
# Compat wrapper for * to behave like a normal String.
#
# @param other [Integer]
# @return [String]
def *(other)
to_s * other
end
# @!group Comparison operators
# Compare a VersionString to an object. If compared to another VersionString
# then sort like `Gem::Version`, otherwise try to treat the other object as
# a version but fall back to normal string comparison.
#
# @param other [Object]
# @return [Integer]
def <=>(other)
other_ver = case other
when VersionString
other.parsed_version
else
begin
Gem::Version.create(other.to_s)
rescue ArgumentError
# Comparing to a string that isn't a version.
return super
end
end
parsed_version <=> other_ver
end
# Compat wrapper for == based on <=>.
#
# @param other [Object]
# @return [Boolean]
def ==(other)
(self <=> other) == 0
end
# Compat wrapper for != based on <=>.
#
# @param other [Object]
# @return [Boolean]
def !=(other)
(self <=> other) != 0
end
# Compat wrapper for < based on <=>.
#
# @param other [Object]
# @return [Boolean]
def <(other)
(self <=> other) < 0
end
# Compat wrapper for <= based on <=>.
#
# @param other [Object]
# @return [Boolean]
def <=(other)
(self <=> other) < 1
end
# Compat wrapper for > based on <=>.
#
# @param other [Object]
# @return [Boolean]
def >(other)
(self <=> other) > 0
end
# Compat wrapper for >= based on <=>.
#
# @param other [Object]
# @return [Boolean]
def >=(other)
(self <=> other) > -1
end
# @!group Matching operators
# Matching operator to support checking against a requirement string.
#
# @param other [Regexp, String]
# @return [Boolean]
# @example Match against a Regexp
# ChefUtils::VersionString.new('1.0.0') =~ /^1/
# @example Match against a requirement
# ChefUtils::VersionString.new('1.0.0') =~ '~> 1.0'
def =~(other)
case other
when Regexp
super
else
Gem::Requirement.create(other) =~ parsed_version
end
end
end
end
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