gistfile1.rb

Pry.commands.command "alias" do |name, action|
  Pry.commands.command name do |*args|
    run action, *args
  end
end
# => #<struct Pry::CommandSet::Command
#     name="alias",
#     description="No description.",
#     options=
#      {:requires_gem=>[],
#       :keep_retval=>false,
#       :argument_required=>false,
#       :interpolate=>true,
#       :shellwords=>true,
#       :listing=>"alias",
#       :use_prefix=>true},
#     block=#<Proc:0x0000010106e9b8@(pry):1>>

[4] (pry) main: 0> alias hello "ls -M"
[5] (pry) main: 0> hello Pry

Pry#methods: backtrace  backtrace=  binding_stack  binding_stack=  commands  commands=  custom_completions  custom_completions=  exception_handler  exception_handler=  hooks  hooks=  incomplete_user_input_exception?  inject_local  inject_special_locals  input  input=  input_array  input_stack  input_stack=  last_dir  last_dir=  last_exception  last_exception=  last_file  last_file=  last_result  last_result=  last_result_is_exception?  memory_size  memory_size=  output  output=  output_array  pop_prompt  print  print=  process_command  prompt  prompt=  push_prompt  r  re  readline  refresh  rep  repl  repl_epilogue  repl_prologue  retrieve_line  run_command  select_prompt  set_last_exception  set_last_result  should_print?  show_result  special_locals  update_input_history  valid_expression?