lib/puppet_library/archive/archiver.rb
# Puppet Library
# Copyright (C) 2014 drrb
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
require 'rubygems/package'
require 'zlib'
module PuppetLibrary::Archive
# Adapted from https://gist.github.com/sinisterchipmunk/1335041
module Archiver
def self.archive_dir(dir, basedir, &block)
gzip(tar(dir, basedir, &block))
end
private
# gzips the underlying string in the given StringIO,
# returning a new StringIO representing the
# compressed file.
def self.gzip(tar_buffer)
zip_buffer = StringIO.new("")
zipper = Zlib::GzipWriter.new(zip_buffer)
zipper.write tar_buffer.string
zipper.close # this is necessary!
# z was closed to write the gzip footer, so
# now we need a new StringIO
StringIO.new zip_buffer.string
end
def self.tar(path, basedir, &block)
tarfile = StringIO.new("")
Gem::Package::TarWriter.new(tarfile) do |tar|
walk_directory(path) do |file|
entry_name = file.sub /^#{Regexp::escape path}\/?/, "#{basedir}/"
TarEntry.from(file).add_to!(tar, entry_name)
end
yield(RebasedTar.new(tar, basedir)) if block_given?
end
tarfile.rewind
tarfile
end
def self.walk_directory(basedir)
Dir[File.join(basedir, "**/*")].each do |file|
yield(file)
end
end
class RebasedTar
def initialize(tar, basedir)
@tar, @basedir = tar, basedir
end
def add_file(name, mode, &block)
entry_name = name.sub /^\/?/, "#{@basedir}/"
@tar.add_file(entry_name, mode, &block)
end
end
class TarEntry
def self.from(file)
TarEntry.new(file)
end
def initialize(file)
@file = file
end
def add_to!(tar, entry_name)
mode = File.stat(@file).mode
if File.directory?(@file)
tar.mkdir(entry_name, mode)
else
tar.add_file(entry_name, mode) do |entry|
File.open(@file, "rb") { |file| entry.write file.read }
end
end
end
end
end
end