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#
# Author:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2008 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/config'
require 'chef/log'
require 'chef/mixin/shell_out'
require 'chef/mixin/file_class'
require 'chef/resource/link'
require 'chef/provider'
require 'chef/scan_access_control'
class Chef
class Provider
class Link < Chef::Provider
include Chef::Mixin::EnforceOwnershipAndPermissions
include Chef::Mixin::ShellOut
include Chef::Mixin::FileClass
def negative_complement(big)
if big > 1073741823 # Fixnum max
big -= (2**32) # diminished radix wrap to negative
end
big
end
private :negative_complement
def whyrun_supported?
true
end
def load_current_resource
@current_resource = Chef::Resource::Link.new(@new_resource.name)
@current_resource.target_file(@new_resource.target_file)
if file_class.symlink?(@current_resource.target_file)
@current_resource.link_type(:symbolic)
@current_resource.to(
canonicalize(file_class.readlink(@current_resource.target_file))
)
else
@current_resource.link_type(:hard)
if ::File.exists?(@current_resource.target_file)
if ::File.exists?(@new_resource.to) &&
file_class.stat(@current_resource.target_file).ino ==
file_class.stat(@new_resource.to).ino
@current_resource.to(canonicalize(@new_resource.to))
else
@current_resource.to("")
end
end
end
ScanAccessControl.new(@new_resource, @current_resource).set_all!
@current_resource
end
def define_resource_requirements
requirements.assert(:delete) do |a|
a.assertion do
if @current_resource.to
@current_resource.link_type == @new_resource.link_type and
(@current_resource.link_type == :symbolic or @current_resource.to != '')
else
true
end
end
a.failure_message Chef::Exceptions::Link, "Cannot delete #{@new_resource} at #{@new_resource.target_file}! Not a #{@new_resource.link_type.to_s} link."
a.whyrun("Would assume the link at #{@new_resource.target_file} was previously created")
end
end
def canonicalize(path)
Chef::Platform.windows? ? path.gsub('/', '\\') : path
end
def action_create
if @current_resource.to != canonicalize(@new_resource.to) ||
@current_resource.link_type != @new_resource.link_type
if @current_resource.to # nil if target_file does not exist
converge_by("unlink existing file at #{@new_resource.target_file}") do
::File.unlink(@new_resource.target_file)
end
end
if @new_resource.link_type == :symbolic
converge_by("create symlink at #{@new_resource.target_file} to #{@new_resource.to}") do
file_class.symlink(canonicalize(@new_resource.to),@new_resource.target_file)
Chef::Log.debug("#{@new_resource} created #{@new_resource.link_type} link from #{@new_resource.to} -> #{@new_resource.target_file}")
Chef::Log.info("#{@new_resource} created")
end
elsif @new_resource.link_type == :hard
converge_by("create hard link at #{@new_resource.target_file} to #{@new_resource.to}") do
file_class.link(@new_resource.to, @new_resource.target_file)
Chef::Log.debug("#{@new_resource} created #{@new_resource.link_type} link from #{@new_resource.to} -> #{@new_resource.target_file}")
Chef::Log.info("#{@new_resource} created")
end
end
end
if @new_resource.link_type == :symbolic
if access_controls.requires_changes?
converge_by(access_controls.describe_changes) do
access_controls.set_all
end
end
end
end
def action_delete
if @current_resource.to # Exists
converge_by ("delete link at #{@new_resource.target_file}") do
::File.delete(@new_resource.target_file)
Chef::Log.info("#{@new_resource} deleted")
end
end
end
end
end
end
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