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# Author:: Seth Falcon (<seth@opscode.com>)
# Author:: Christopher Walters (<cw@opscode.com>)
# Copyright:: Copyright 2010-2011 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.
require 'chef/version_class'
class Chef
class VersionConstraint
DEFAULT_CONSTRAINT = ">= 0.0.0"
STANDARD_OPS = %w(< > <= >=)
OPS = %w(< > = <= >= ~>)
PATTERN = /^(#{OPS.join('|')}) *([0-9].*)$/
VERSION_CLASS = Chef::Version
attr_reader :op, :version
def initialize(constraint_spec=DEFAULT_CONSTRAINT)
case constraint_spec
when nil
parse(DEFAULT_CONSTRAINT)
when Array
parse_from_array(constraint_spec)
when String
parse(constraint_spec)
else
msg = "VersionConstraint should be created from a String. You gave: #{constraint_spec.inspect}"
raise Chef::Exceptions::InvalidVersionConstraint, msg
end
end
def include?(v)
version = if v.respond_to? :version # a CookbookVersion-like object
self.class::VERSION_CLASS.new(v.version.to_s)
else
self.class::VERSION_CLASS.new(v.to_s)
end
do_op(version)
end
def inspect
"(#{to_s})"
end
def to_s
"#{@op} #{@raw_version}"
end
def eql?(o)
o.class == self.class && @op == o.op && @version == o.version
end
alias_method :==, :eql?
private
def do_op(other_version)
if STANDARD_OPS.include? @op
other_version.send(@op.to_sym, @version)
elsif @op == '='
other_version == @version
elsif @op == '~>'
if @missing_patch_level
(other_version.major == @version.major &&
other_version.minor >= @version.minor)
else
(other_version.major == @version.major &&
other_version.minor == @version.minor &&
other_version.patch >= @version.patch)
end
else # should never happen
raise "bad op #{@op}"
end
end
def parse_from_array(constraint_spec)
if constraint_spec.empty?
parse(DEFAULT_CONSTRAINT)
elsif constraint_spec.size == 1
parse(constraint_spec.first)
else
msg = "only one version constraint operation is supported, but you gave #{constraint_spec.size} "
msg << "['#{constraint_spec.join(', ')}']"
raise Chef::Exceptions::InvalidVersionConstraint, msg
end
end
def parse(str)
@missing_patch_level = false
if str.index(" ").nil? && str =~ /^[0-9]/
# try for lone version, implied '='
@raw_version = str
@version = self.class::VERSION_CLASS.new(@raw_version)
@op = "="
elsif PATTERN.match str
@op = $1
@raw_version = $2
@version = self.class::VERSION_CLASS.new(@raw_version)
if @raw_version.split('.').size <= 2
@missing_patch_level = true
end
else
raise Chef::Exceptions::InvalidVersionConstraint, "'#{str}'"
end
end
end
end
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