gist:47856

#! /usr/bin/ruby -w

# File: ryaourt
#
# A utility script let you can install rubygems as archlinux's aur package manager yaourt.
#
# Usge:
# 
# $ ryaourt gem_you_want_to_query
#
# Example:
# [ ~ ]$ ryaourt rspec
#    1  ateam-rspec_merb_helpers
#    2  dcadenas-rspec2rr
#    3  dchelimsky-dchelimsky-rspec
#    4  dchelimsky-dchelimsky-rspec-rails
#    5  dchelimsky-rspec
#    6  dchelimsky-rspec-rails
#    7  gregwebs-rspec_multi_matchers
#    8  jcnetdev-rspec-rails
#    9  jferris-rspec_macros
#   10  laurynasl-rspec_merb_helpers
#   11  mig-rspec_abandoner
#   12  niessner-rspec_controller_macros
#   13  nofxx-rspec_spinner
#   14  rspec
#   15  rspec-ext
#   16  rspec-fixture
#   17  rspec-rails
#   18  rspec_generator
#   19  rspec_hpricot_matchers
#   20  rspec_spinner
#   21  saturnflyer-rspec-rails-matchers
#   22  spicycode_rspec_extensions
#   23  waves-rspec
# ==>  Enter n° (separated by blanks, or a range) of rubygems to be installed
# ==>   ----------------------------------------------
# ==>14 17
# Installing rspec, rspec-rails now, please waite.
# Updating class cache with 4957 classes...
# Successfully installed rspec-1.1.12
# Successfully installed rspec-rails-1.1.12
# 2 gems installed
# Installing ri documentation for rspec-1.1.12...
# Installing ri documentation for rspec-rails-1.1.12...
# Installing RDoc documentation for rspec-1.1.12...
# Installing RDoc documentation for rspec-rails-1.1.12...

def gem_search(query)
  list = `gem search --no-version --remote #{query}` 
  list.split("\n")
end

def display_list(list)
  list.each_with_index { |item, index| printf "%4d\s\s%s\n", index, item }
end

def install_gems(gems, gems_list)
  gem_names = gems.split(" ").inject([]) do |names, g| 
    names << gems_list.slice(g.to_i - 1)
  end
  printf "Installing #{gem_names.join(', ').reverse.sub(' ,', ' dna ').reverse} now, please waite.\n"
  printf `sudo gem install -r #{gem_names.join(' ')}`
end

def display_tips
  printf "==>  Enter n° (separated by blanks) of rubygems to be installed\n"
  printf "==>   ----------------------------------------------\n"
  printf "==>"
end

def main(query)
  result_list = gem_search(query)
  display_list(result_list)
  display_tips
  input = STDIN.readline
  unless input.nil? || input.empty?
    install_gems(input, result_list)
  end
end

if $0 == __FILE__
  main(ARGV[0])
end