git-bstack.rb

command = ARGV.shift
args = ARGV
puts "arguments: #{command}, args: #{args}"
raise "Unknow command" unless ['co', 'pop'].include?(command)
file_path = '/tmp/.bstack'


module BStack
  class PopCmd
    attr_reader :file
    def initialize(file)
      @file = file
    end
    def run
      puts "running pop command"
      @file.pop
    end
  end

  class CheckoutCmd
    attr_reader :file, :new_branch
    def initialize(file, new_branch)
      @file = file
      @new_branch = new_branch
    end
    def run
      puts "running checkout #{new_branch} command"
      current_branch = GitCmds.current_branch
      if GitCmds.git_co_new_branch(new_branch)
        puts "here"
        file.push(current_branch)
      end
    end
  end

  class StackFile
    PATH = '/tmp/.bstack'
    def pop
      File.open(PATH, 'r+') do |f|
        buffer_arry = f.readlines
        buffer_arry.pop
        f.truncate(0)
        f.puts(buffer_arry.join())
      end
    end

    def push(branch)
      File.open(PATH, 'a+') do |f|
        require 'pry'
        f.puts(branch)
      end
    end

  end

  class GitCmds
    def self.current_branch
      str =  `git rev-parse --abbrev-ref HEAD`
      str.gsub(/\n/, '')
    end

    def self.git_co_new_branch(branch)
      `git checkout #{branch}`
      current_branch == branch ? true : false
    end

  end

  class Runner
    COMMANDS = { pop: BStack::PopCmd, co: BStack::CheckoutCmd }
    def self. run(command, *args)
      file = StackFile.new
      cmd = COMMANDS[command.to_sym].new(file, *args)
      cmd.run
    end
  end
end

BStack::Runner.run(command, *args)