inspec/lib/fetchers/tar.rb

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2016-02-21 01:48:45 +00:00
# encoding: utf-8
# author: Dominik Richter
# author: Christoph Hartmann
require 'rubygems/package'
require 'zlib'
module Fetchers
class Tar < Inspec.fetcher(1)
name 'tar'
priority 100
attr_reader :files
def self.resolve(target)
return nil unless File.file?(target)
return nil unless target.end_with?('.tar.gz', '.tgz')
new(target)
end
def initialize(target)
@target = target
@contents = {}
@files = []
Gem::Package::TarReader.new(Zlib::GzipReader.open(@target)) do |tar|
@files = tar.map(&:full_name)
end
end
def read(file)
@contents[file] ||= read_from_tar(file)
end
def read_from_tar(file)
return nil unless @files.include?(file)
res = nil
Gem::Package::TarReader.new(Zlib::GzipReader.open(@target)) do |tar|
tar.each do |entry|
next if entry.directory?
# ignore symlinks for now
next if entry.header.typeflag == '2'
# only handle files for now
next unless entry.file?
next unless file == entry.full_name
res = entry.read
break
end
end
res
end
end
end