summaryrefslogtreecommitdiff
path: root/lib/chef/version_constraint.rb
diff options
context:
space:
mode:
authorSeth Chisamore <schisamo@opscode.com>2012-10-30 10:39:35 -0400
committerSeth Chisamore <schisamo@opscode.com>2012-10-30 10:39:35 -0400
commit24dc69a9a97e82a6e4207de68d6dcc664178249b (patch)
tree19bb289c9f88b4bbab066bc56b95d6d222fd5c35 /lib/chef/version_constraint.rb
parent9348c1c9c80ee757354d624b7dc1b78ebc7605c4 (diff)
downloadchef-24dc69a9a97e82a6e4207de68d6dcc664178249b.tar.gz
[OC-3564] move core Chef to the repo root \o/ \m/
The opscode/chef repository now only contains the core Chef library code used by chef-client, knife and chef-solo!
Diffstat (limited to 'lib/chef/version_constraint.rb')
-rw-r--r--lib/chef/version_constraint.rb116
1 files changed, 116 insertions, 0 deletions
diff --git a/lib/chef/version_constraint.rb b/lib/chef/version_constraint.rb
new file mode 100644
index 0000000000..b6f1f08757
--- /dev/null
+++ b/lib/chef/version_constraint.rb
@@ -0,0 +1,116 @@
+# 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('|')}) (.+)$/
+
+ 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
+ Chef::Version.new(v.version.to_s)
+ else
+ Chef::Version.new(v.to_s)
+ end
+ do_op(version)
+ end
+
+ def inspect
+ "(#{@op} #{@version})"
+ end
+
+ def to_s
+ "#{@op} #{@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 '='
+ @version = Chef::Version.new(str)
+ @op = "="
+ elsif PATTERN.match str
+ @op = $1
+ raw_version = $2
+ @version = Chef::Version.new(raw_version)
+ if raw_version.split('.').size == 2
+ @missing_patch_level = true
+ end
+ else
+ raise Chef::Exceptions::InvalidVersionConstraint, "'#{str}'"
+ end
+ end
+
+ end
+end