A rakefile to build your xcodeproject and place the result in your applications folder.

Rakefile

#!/usr/bin/env rake

require 'rubygems'
require 'fileutils'

# This requires the 'colorize' gem. Install with `[sudo] gem install colorize`
require 'colorize'

task :default => [:build]

def choose_file(file_array)
  # Print out each filename with a number beside it
  file_array.each { |file| puts "#{ file_array.index(file) + 1}: #{ file }" }

  # Have the user pick the appropriate file
  print("Enter the number to open: ")
  num = gets.to_i

  # Make sure the pick is reasonable
  if num > file_array.count || num < 1
    puts "That doesn't seem reasonable"
  elsif num <= file_array.count
    num -= 1
    puts "Chose: #{ file_array[num] }".green
    return file_array[num]
  end
end

desc "Build the current project and copy the product to /Applications"
task :build do

  # The filename of the workspace or project file
  project_name ||= ""

  # An array just incase there are multiple files or projects
  path_array = Array.new

  # Check each file in the directory to find the files including 'xcworkspace'
  Dir.foreach(".") { |file| path_array << file if file.include? "xcworkspace" }

  # If there is only one workspace
  if path_array.count == 1
    # Put the name and assign it to the project_name
    puts "Workspace: #{ path_array.first }".green
    project_name = path_array.first
  
  # If there is more than one
  elsif path_array.count > 1
    project_name = choose_file(path_array)
  else # path_array.count != 1
    puts "No xcworkspaces in #{ Dir.pwd }".red
    puts "Looking for xcodeprojs..."

    # Check each file in the cd this time for 'xcodeproj'
    Dir.foreach(".") { |file| path_array << file if file.include? "xcodeproj" }

    # If there is only one assign it to project_name and flip the workspace flag
    if path_array.count == 1
      puts "Project: #{ path_array.first }".green
      project_name = path_array.first

    # If there is more than one ask the user
    elsif path_array.count > 1
      project_name = choose_file(path_array)
    else # path_array < 1
      puts "No xcworkspace or xcodeproj files in #{ Dir.pwd }".red
      exit
    end # path_array count checking
  end # original path_array count checking

  # Should have the project filename at this point

  # If the project is a workspace
  if project_name.include? "xcworkspace"
    # Send the terminal command to build the project with xcodebuild assume the 
    build_output = %x[xcodebuild -workspace "#{ project_name}" -scheme "#{ File.basename(project_name, ".*") }"]

    # Put the output of the build into the array
    build_output_array = build_output.split("\n")

    directory_name = ""

    # Load the containing path string
    build_output_array.any? { |line| directory_name = line.strip if line.include? 'CODESIGNING_FOLDER_PATH' }

    if directory_name.length > 0
      # An ugly way to get the entire folder path of the product of the build
      directory_name = File.dirname(directory_name.split('CODESIGNING_FOLDER_PATH').last.strip)

      apps_array = Array.new
      app_name = ""

      Dir.chdir directory_name
      Dir.foreach(".") { |file| apps_array << file if file.include? ".app" }

      if apps_array.count == 1
        app_name = apps_array.first
      elsif apps_array.count <= 0
        puts "No apps found in #{ Dir.pwd }".red
      else
        apps_array.each { |app| puts "#{ apps_array.index(app) + 1 }: #{ app }" }

        print("Enter a number to open: ")
        num = gets.to_i

        if num > apps_array.count || num < 1
          puts "That doesn't seem reasonable"
        elsif num <= apps_array.count
          num -= 1
          puts "App: #{ apps_array[num] }"
          app_name = apps_array[num]
        end
      end
      %x[pkill "#{ File.basename(app_name, '.*') }"]

      if File.directory? "/Applications/#{ app_name }"
        FileUtils.rm_rf("/Applications/#{ app_name }")
        if File.directory? "/Applications/#{ app_name }"
          puts "Error deleting /Applications/#{ app_name } you may not have sufficient privledges. Quitting...".red
          exit
        end
      end
      
      FileUtils.mv app_name, "/Applications/#{ app_name }", :force => true
      if File.directory? "/Applications/#{ app_name }"
        puts "Successfully copied #{ app_name } to /Applications".green
      else
        puts "Failed to copy #{ app_name } to /Applications".red
      end
    else
      puts "nope"
    end

  else

  end
end # :build