Multi-archive extractor (shells out)

extractall.rb

#!/usr/bin/env ruby
# extractall
#   Because sometimes I don't feel like typing unzip or tar and just want
#   to extract multiple acrhives of varying type, or I dont feel like
#   mkdir-ing && doing the previous thing.
#   I just wanna "Do the thing" as varrick would say ;3
require 'fileutils'
require 'optparse'

module ExtractAll
  module Version
    MAJOR, MINOR, TEENY, PATCH = 2, 0, 0, nil
    STRING = [MAJOR, MINOR, TEENY, PATCH].compact.join('.').freeze
  end
  VERSION = Version::STRING

  class Instance
    # Controls whether this Instance is in verbose mode, which it will
    # print out all debug information.
    # @return [Boolean]
    attr_accessor :verbose

    def initialize(options = {})
      @verbose = options.fetch(:verbose, false)
    end

    def sh(command)
      puts command if @verbose
      system(command)
    end
  end
end

options = {
  verbose: false
}

argv = OptionParser.new do |opts|
  opts.banner = "Usage: #{File.basename(__FILE__)} [options] [<filename>...]"
  opts.on '-d', '--directory DIRNAME', String, 'set extraction directory' do |v|
    options[:directory] = v
  end
  opts.on '-v', '--[no-]verbose', 'verbose mode' do |v|
    options[:verbose] = v
  end
  opts.on '', '--version', 'displays version' do
    puts "extractall v#{ExtractAll::VERSION}"
    puts 'by IceDragon'
  end
  opts.on '-h', '--help', 'Display this help' do |v|
    puts opts
    exit
  end
end.parse!

exts_ary = ['tar.gz', 'tar', 'zip', 'rar', '7z', 'iso', 'ISO']

files = argv.empty? ? Dir.glob("*.{#{exts_ary.join(",")}}") : argv.dup
exts = exts_ary.join('|').gsub('.', '\.')

FileUtils.mkdir_p(options[:directory]) if options.key?(:directory)

inst = ExtractAll::Instance.new(options)

files.each do |filename|
  extname = filename.scan(/(\.(?:#{exts}))\z/).first.first
  dirname = filename.gsub(/\.(?:#{exts})\z/, '')

  if d = options[:directory]
    dirname = File.join(d, dirname)
  end

  if Dir.exists?(dirname)
    STDERR.puts "directory #{dirname} already exists"
  else
    case extname.downcase
    when '.iso', '.7z'
      inst.sh("7za x -o\"#{dirname}\" \"#{filename}\"", filename)
    when '.tar.gz', '.tar'
      FileUtils::Verbose.mkdir_p(dirname)
      unless inst.sh("tar -xf \"#{filename}\" --directory=\"#{dirname}\"", filename)
        FileUtils::Verbose.rm_rf(dirname)
      end
    when '.zip'
      inst.sh("unzip -q -d \"#{dirname}\" \"#{filename}\"", filename)
    when '.rar'
      FileUtils::Verbose.mkdir_p(dirname)
      unless inst.sh("unrar -inul x \"#{filename}\" \"#{dirname}\"", filename)
        FileUtils::Verbose.rm_rf(dirname)
      end
    else
      STDERR.puts "unhandled archive extension: #{extension}"
    end
  end
end