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Class: Kward::InteractivePtyRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/kward/interactive_pty_runner.rb

Overview

Runs a command in a PTY while forwarding caller-owned input and output sink. This is intentionally low level: UI orchestration decides when terminal ownership is handed to the child process and how the result is presented.

Defined Under Namespace

Classes: Result

Constant Summary collapse

READ_SIZE = 
4096

Instance Method Summary collapse

Constructor Details

#initialize(window_size_provider: nil) ⇒ InteractivePtyRunner

Returns a new instance of InteractivePtyRunner.



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# File 'lib/kward/interactive_pty_runner.rb', line 18

def initialize(window_size_provider: nil)
  @window_size_provider = window_size_provider
  @window_size = nil
end

Instance Method Details

#run(*command, env: {}, cwd: Dir.pwd, input: $stdin, sink:, tab_action_handler: nil, on_detach: nil) ⇒ Object 



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# File 'lib/kward/interactive_pty_runner.rb', line 23

def run(*command, env: {}, cwd: Dir.pwd, input: $stdin, sink:, tab_action_handler: nil, on_detach: nil)
  reader, writer, pid = PTY.spawn(env.to_h, *command, chdir: cwd.to_s)
  status = nil
  input_forwarded = false
  tab_action = nil
  forwarded = false
  detached = nil

  update_window_size(reader, pid)
  with_raw_input(input) do
    input_forwarded, tab_action = drain_initial_input(input, writer, sink, tab_action_handler: tab_action_handler)
    if tab_action && on_detach
      detached_sink = on_detach.call
      sink.finish if sink.respond_to?(:finish)
      detached = detach_process(reader, writer, pid, detached_sink, input_forwarded)
      reader = writer = pid = nil
    elsif tab_action
      status = terminate_and_reap(pid)
    else
      status, forwarded, tab_action = forward_io(reader, writer, pid, input, sink, tab_action_handler: tab_action_handler, on_detach: on_detach)
      input_forwarded ||= forwarded
      if tab_action && on_detach
        detached_sink = on_detach.call
        sink.finish if sink.respond_to?(:finish)
        detached = detach_process(reader, writer, pid, detached_sink, input_forwarded)
        reader = writer = pid = nil
      end
    end
    input_forwarded ||= forwarded
  end
  sink.finish if sink.respond_to?(:finish) && !detached
  status ||= wait_for_status(pid) if pid

  Result.new(exit_status: exit_status(status), input_forwarded: input_forwarded, tab_action: tab_action, background: detached)
ensure
  writer&.close unless writer&.closed?
  reader&.close unless reader&.closed?
  terminate_and_reap(pid) if pid && status.nil?
end