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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/resource/file'
require 'chef/mixin/checksum'
require 'chef/mixin/generate_url'
require 'chef/provider'
require 'etc'
require 'fileutils'
class Chef
class Provider
class File < Chef::Provider
include Chef::Mixin::Checksum
include Chef::Mixin::GenerateURL
def negative_complement(big)
if big > 1073741823 # Fixnum max
big -= (2**32) # diminished radix wrap to negative
end
big
end
def octal_mode(mode)
((mode.respond_to?(:oct) ? mode.oct : mode.to_i) & 007777)
end
private :negative_complement, :octal_mode
def load_current_resource
@current_resource = Chef::Resource::File.new(@new_resource.name)
@new_resource.path.gsub!(/\\/, "/") # for Windows
@current_resource.path(@new_resource.path)
if ::File.exist?(@current_resource.path) && ::File.readable?(@current_resource.path)
cstats = ::File.stat(@current_resource.path)
@current_resource.owner(cstats.uid)
@current_resource.group(cstats.gid)
@current_resource.mode(octal_mode(cstats.mode))
@current_resource.checksum(checksum(@current_resource.path))
end
@current_resource
end
# Compare the content of a file. Returns true if they are the same, false if they are not.
def compare_content
@current_resource.checksum == new_resource_content_checksum
end
# Set the content of the file, assuming it is not set correctly already.
def set_content
unless compare_content
Chef::Log.info("Setting content for #{@new_resource}")
backup @new_resource.path if ::File.exists?(@new_resource.path)
::File.open(@new_resource.path, "w") {|f| f.write @new_resource.content }
@new_resource.updated = true
end
end
# Compare the ownership of a file. Returns true if they are the same, false if they are not.
def compare_owner
return false if @new_resource.owner.nil?
@set_user_id = case @new_resource.owner
when /^\d+$/, Integer
@new_resource.owner.to_i
else
# This raises an ArgumentError if you can't find the user
Etc.getpwnam(@new_resource.owner).uid
end
@set_user_id == @current_resource.owner
end
# Set the ownership on the file, assuming it is not set correctly already.
def set_owner
unless compare_owner
Chef::Log.info("Setting owner to #{@set_user_id} for #{@new_resource}")
@set_user_id = negative_complement(@set_user_id)
::File.chown(@set_user_id, nil, @new_resource.path)
@new_resource.updated = true
end
end
# Compares the group of a file. Returns true if they are the same, false if they are not.
def compare_group
return false if @new_resource.group.nil?
@set_group_id = case @new_resource.group
when /^\d+$/, Integer
@new_resource.group.to_i
else
Etc.getgrnam(@new_resource.group).gid
end
@set_group_id == @current_resource.group
end
def set_group
unless compare_group
Chef::Log.info("Setting group to #{@set_group_id} for #{@new_resource}")
@set_group_id = negative_complement(@set_group_id)
::File.chown(nil, @set_group_id, @new_resource.path)
@new_resource.updated = true
end
end
def compare_mode
case @new_resource.mode
when /^\d+$/, Integer
octal_mode(@new_resource.mode) == octal_mode(@current_resource.mode)
else
false
end
end
def set_mode
unless compare_mode && @new_resource.mode != nil
Chef::Log.info("Setting mode to #{sprintf("%o" % octal_mode(@new_resource.mode))} for #{@new_resource}")
# CHEF-174, bad mojo around treating integers as octal. If a string is passed, we try to do the "right" thing
::File.chmod(octal_mode(@new_resource.mode), @new_resource.path)
@new_resource.updated = true
end
end
def action_create
unless ::File.exists?(@new_resource.path)
Chef::Log.info("Creating #{@new_resource} at #{@new_resource.path}")
::File.open(@new_resource.path, "w+") { |f| }
@new_resource.updated = true
end
set_content unless @new_resource.content.nil?
set_owner unless @new_resource.owner.nil?
set_group unless @new_resource.group.nil?
set_mode unless @new_resource.mode.nil?
end
def action_create_if_missing
action_create
end
def action_delete
if ::File.exists?(@new_resource.path)
if ::File.writable?(@new_resource.path)
backup unless ::File.symlink?(@new_resource.path)
Chef::Log.info("Deleting #{@new_resource} at #{@new_resource.path}")
::File.delete(@new_resource.path)
@new_resource.updated = true
else
raise "Cannot delete #{@new_resource} at #{@new_resource_path}!"
end
end
end
def action_touch
action_create
time = Time.now
Chef::Log.info("Updating #{@new_resource} with new atime/mtime of #{time}")
::File.utime(time, time, @new_resource.path)
@new_resource.updated = true
end
def backup(file=nil)
file ||= @new_resource.path
if @new_resource.backup != false && @new_resource.backup > 0 && ::File.exist?(file)
time = Time.now
savetime = time.strftime("%Y%m%d%H%M%S")
backup_filename = "#{@new_resource.path}.chef-#{savetime}"
prefix = Chef::Config[:file_backup_path] || ""
if Chef::Config[:file_backup_path]
FileUtils.mkdir_p(::File.dirname(Chef::Config[:file_backup_path] + backup_filename))
end
Chef::Log.info("Backing up #{@new_resource} to #{prefix + backup_filename}")
FileUtils.cp(file, prefix + backup_filename, :preserve => true)
# Clean up after the number of backups
slice_number = @new_resource.backup
backup_files = Dir[prefix + "#{@new_resource.path}.chef-*"].sort { |a,b| b <=> a }
if backup_files.length >= @new_resource.backup
remainder = backup_files.slice(slice_number..-1)
remainder.each do |backup_to_delete|
Chef::Log.info("Removing backup of #{@new_resource} at #{backup_to_delete}")
FileUtils.rm(backup_to_delete)
end
end
end
end
def generate_url(url, type, args=nil)
cookbook_name = (@new_resource.respond_to?(:cookbook) && @new_resource.cookbook) ? @new_resource.cookbook : @new_resource.cookbook_name
generate_cookbook_url(url, cookbook_name, type, @node, args)
end
private
def new_resource_content_checksum
@new_resource.content && Digest::SHA2.hexdigest(@new_resource.content)
end
end
end
end
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