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#!/usr/bin/ruby
class Package
  Makepkg = '/usr/bin/makepkg'
  Pacman = '/usr/bin/pacman'
  LogBuild = 'manager-build.log'
  LogInstall = 'manager-install.log'
  def initialize(file='PKGBUILD')
    raise ArgumentErorr, "Package: argument must respond to to_s" unless file.respond_to? :to_s
    @file = file.to_s
  end
  def build
    system(Makepkg, '-s', '-p',@file, '--noconfirm', '-L', LogBuild)
    $? == 0
  end
  def install
    system(Makepkg, '-i', '--noconfirm', '--logfile', LogInstall, '--skipchecksums')
    $? == 0
  end
end
def cd(i)
  begin
    Dir.chdir(i)
  rescue
    puts "An error happened in cd().Path don't found: #{i}"
    false
  end
end
key, *args = ARGV.clone
def eaching(args)
  args.each do |package|
    if cd(package)
      p = Package.new
      yield p,package
    end
  end
end
Help = <<TEXT
build <packages> -- build packages in directories at it with name like name package
install <packages> -- build packages in directories at it with name like name package
help -- get this help
TEXT
case key
when 'help'
  puts Help
when 'build'
  eaching(args) do |p,name|
    puts "Build Error in package #{name}" unless p.build
    cd('..')
  end
when 'install'
  eaching(args) do |p,name|
    puts "Install Error in package #{name}" unless p.install
    cd('..')
  end
else
  puts "Unsuppported key, write 'manager help' for get help!"
end
# ARGV.each { |package|
#   if cd(package)
#     system('pwd')
#     cd('..')
#   end
#   }

(20:47:58) jhass: I prefer constants to be in SCREAMING_SNAKE_CASE
and not in CamlCase which is for classes and modules, but that's style
(20:49:05) jhass: Kernel#system already returns true/false depending on 
non-zero exit code, so $? == 0 is redundant
(21:47:36) jhass: use more newlines
(21:47:59) jhass: separate methods and class definitions and
code blocks with empty lines 
(21:48:40) jhass: def foo; begin; ...; rescue; ...end; end; -> def foo; ...; rescue; ...; end;,
 methods have an implicit begin