Module: MetaCon::Shorthand

Extended by:
Shorthand
Included in:
Loaders::PythonBrew, Loaders::RVM, Project, Shorthand
Defined in:
lib/metacon/shorthand.rb

Instance Method Summary collapse

Instance Method Details

#common_prefix(a, b) ⇒ Object

Take two arrays and return an array holding the common prefix and then the remainder for each of the originals.



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# File 'lib/metacon/shorthand.rb', line 52

def common_prefix(a,b)
  res = []
  (0..[a.size,b.size].max).each do |i|
    if a[i] == b[i]; res << a[i]
    else break end
  end
  return [res, a[res.size..-1] || [], b[res.size..-1] || []]
end

#included(by) ⇒ Object 



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# File 'lib/metacon/shorthand.rb', line 3

def included(by); by.extend(self) end

#relative_path(initial, dest) ⇒ Object

Make a path relative (relative to the initial path)



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# File 'lib/metacon/shorthand.rb', line 41

def relative_path(initial,dest)
  dest = File.expand_path(dest).split('/')
  initial = File.expand_path(initial)
  initial = File.dirname(initial) unless File.directory?(initial)
  initial = initial.split('/')
  pref,a,b = common_prefix(dest,initial)
  return (b.map{|d|'..'} + a).join('/')
end

#shcmd(cmd_string, echo = true) ⇒ Object 



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# File 'lib/metacon/shorthand.rb', line 4

def shcmd(cmd_string, echo=true)
  require 'open3'
  main_out = ''
  err_out = ''
  exit_status = 1
  $stdout.puts(cmd_string) if echo
  Open3.popen3('/usr/bin/env bash -s') do |stdin, stdout, stderr, wth|
    stdin.puts cmd_string
    stdin.flush
    stdin.close
    loop do
      ready, _, exc = IO.select [stdout, stderr], [], [stdout, stderr], 5000
      ready.map!{|str| str.fileno}
      if (!stdout.eof?) && ready.include?(stdout.fileno)
        more = stdout.readpartial(4096)
        if echo
          $stdout.print more
          $stdout.flush
        end
        main_out += more
      elsif (!stderr.eof?) && ready.include?(stderr.fileno)
        more = stderr.readpartial(4096)
        if echo
          $stderr.print more
          $stderr.flush
        end
        err_out += more
      else break end
      break if (stderr.eof? && stdout.eof?)
    end
    if wth.nil? then exit_status = err_out.length > 0 ? 1 : 0  # Best guess
    else exit_status = wth.value.to_i end
  end
  return [main_out, err_out, exit_status]
end