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#
# Author:: John Keiser (<jkeiser@chef.io>)
# Copyright:: Copyright (c) Chef Software 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_relative "../../file_system_cache"
class Chef
module ChefFS
module FileSystem
module Repository
class Directory
attr_reader :name
attr_reader :parent
attr_reader :path
attr_reader :file_path
alias_method :display_path, :path
alias_method :display_name, :name
alias_method :bare_name, :name
def initialize(name, parent, file_path = nil)
@parent = parent
@name = name
@path = Chef::ChefFS::PathUtils.join(parent.path, name)
@file_path = file_path || "#{parent.file_path}/#{name}"
end
def name_valid?
!name.start_with?(".")
end
# Whether or not the file system entry this object represents is
# valid. Mainly used to trim dotfiles/dotdirs and non directories
# from the list of children when enumerating items on the filesystem
def fs_entry_valid?
name_valid? && File.directory?(file_path)
end
# ChefFS API:
# Public API called by multiplexed_dir
def can_have_child?(name, is_dir)
possible_child = make_child_entry(name)
possible_child.dir? == is_dir && possible_child.name_valid?
end
# Public API called by chef_fs/file_system
def dir?
true
end
def path_for_printing
file_path
end
def children
return FileSystemCache.instance.children(file_path) if FileSystemCache.instance.exist?(file_path)
children = dir_ls.sort
.map { |child_name| make_child_entry(child_name) }
.select { |new_child| new_child.fs_entry_valid? && can_have_child?(new_child.name, new_child.dir?) }
FileSystemCache.instance.set_children(file_path, children)
rescue Errno::ENOENT => e
raise Chef::ChefFS::FileSystem::NotFoundError.new(self, e)
end
def create_child(child_name, file_contents = nil)
child = make_child_entry(child_name)
if child.exists?
raise Chef::ChefFS::FileSystem::AlreadyExistsError.new(:create_child, child)
end
FileSystemCache.instance.delete!(child.file_path)
if file_contents
child.write(file_contents)
else
begin
Dir.mkdir(child.file_path)
rescue Errno::EEXIST
raise Chef::ChefFS::FileSystem::AlreadyExistsError.new(:create_child, child)
end
end
child
end
# An empty children array is an empty dir
def empty?
children.empty?
end
# Public API callied by chef_fs/file_system
def child(name)
possible_child = make_child_entry(name)
if possible_child.name_valid?
possible_child
else
NonexistentFSObject.new(name, self)
end
end
def root
parent.root
end
# File system wrappers
def create(file_contents = nil)
if exists?
raise Chef::ChefFS::FileSystem::AlreadyExistsError.new(:create_child, self)
end
begin
FileSystemCache.instance.delete!(file_path)
Dir.mkdir(file_path)
rescue Errno::EEXIST
raise Chef::ChefFS::FileSystem::AlreadyExistsError.new(:create_child, self)
end
end
def dir_ls
Dir.entries(file_path).select { |p| !p.start_with?(".") }
end
def delete(recurse)
if exists?
unless recurse
raise MustDeleteRecursivelyError.new(self, $!)
end
FileUtils.rm_r(file_path)
FileSystemCache.instance.delete!(file_path)
else
raise Chef::ChefFS::FileSystem::NotFoundError.new(self, $!)
end
end
def exists?
File.exists?(file_path)
end
protected
def write(data)
raise FileSystemError.new(self, nil, "attempted to write to a directory entry")
end
def make_child_entry(child_name)
raise "Not Implemented"
end
end
end
end
end
end
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