Class: Harnex::Session

Inherits:
Object
  • Object
show all
Defined in:
lib/harnex/runtime/session.rb

Defined Under Namespace

Classes: EventCounters

Constant Summary collapse

OUTPUT_BUFFER_LIMIT = 
64 * 1024
TRANSCRIPT_TAIL_BYTES = 
16 * 1024
AUTOSTOP_TEARDOWN_GRACE_SECONDS_DEFAULT = 
5.0
USAGE_FIELDS = 
%i[
  input_tokens output_tokens reasoning_tokens cached_tokens total_tokens
  agent_session_id cost_usd tool_calls model agent_provider
].freeze
SESSION_SUMMARY_SIGNAL_FIELDS = 
%i[
  input_tokens output_tokens reasoning_tokens cached_tokens total_tokens
  agent_session_id cost_usd
].freeze
BUDGET_META_FIELDS = 
%w[read_budget_lines output_ceiling_lines].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(adapter:, command:, repo_root:, host:, port: nil, id: DEFAULT_ID, watch: nil, description: nil, meta: nil, summary_out: nil, inbox_ttl: Inbox::DEFAULT_TTL, auto_stop: false, launch_cwd: nil) ⇒ Session

Returns a new instance of Session.



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# File 'lib/harnex/runtime/session.rb', line 64

def initialize(adapter:, command:, repo_root:, host:, port: nil, id: DEFAULT_ID, watch: nil, description: nil, meta: nil, summary_out: nil, inbox_ttl: Inbox::DEFAULT_TTL, auto_stop: false, launch_cwd: nil)
  @adapter = adapter
  @command = command
  @repo_root = repo_root
  @launch_cwd = File.expand_path(launch_cwd.to_s.empty? ? repo_root : launch_cwd)
  @host = host
  @id = Harnex.normalize_id(id)
  @watch = watch
  @description = description.to_s.strip
  @description = nil if @description.empty?
  @meta = meta
  @summary_out = summary_out.to_s.strip
  @summary_out = nil if @summary_out.empty?
  @registry_path = Harnex.registry_path(repo_root, @id)
  @output_log_path = Harnex.output_log_path(repo_root, @id)
  @events_log_path = Harnex.events_log_path(repo_root, @id)
  @session_id = SecureRandom.hex(8)
  @token = SecureRandom.hex(16)
  @port = Harnex.allocate_port(repo_root, @id, port, host: host)
  @mutex = Mutex.new
  @inject_mutex = Mutex.new
  @events_mutex = Mutex.new
  @stop_mutex = Mutex.new
  @auto_stop_mutex = Mutex.new
  @injected_count = 0
  @last_injected_at = nil
  @started_at = Time.now
  @server = nil
  @reader = nil
  @output_log = nil
  @events_log = nil
  @events_log_seq = 0
  @event_counters = EventCounters.new
  @git_start = {}
  @git_end = {}
  @usage_summary = {}
  @ended_at = nil
  @exit_reason = nil
  @last_error = nil
  @session_finalized = false
  @turn_started_seen = false
  @last_completed_at = nil
  @pi_streamed_text_by_message = {}
  @auto_stop = !!auto_stop
  @auto_stop_fired = false
  @auto_stop_seen_busy = false
  @auto_stop_threads = []
  @stop_requested = false
  @writer = nil
  @pid = nil
  @term_signal = nil
  @output_buffer = +""
  @output_buffer.force_encoding(Encoding::BINARY)
  @state_machine = SessionState.new(adapter)
  @inbox = Inbox.new(self, @state_machine, ttl: inbox_ttl)
  @rate_limits = nil
  @parent_harnex_id = ENV["HARNEX_ID"].to_s.strip
  @parent_harnex_id = nil if @parent_harnex_id.empty?
end

Instance Attribute Details

#adapter ⇒ Object (readonly)

Returns the value of attribute adapter.



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# File 'lib/harnex/runtime/session.rb', line 60

def adapter
  @adapter
end

#command ⇒ Object (readonly)

Returns the value of attribute command.



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# File 'lib/harnex/runtime/session.rb', line 60

def command
  @command
end

#description ⇒ Object (readonly)

Returns the value of attribute description.



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# File 'lib/harnex/runtime/session.rb', line 60

def description
  @description
end

#ended_at ⇒ Object (readonly)

Returns the value of attribute ended_at.



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# File 'lib/harnex/runtime/session.rb', line 60

def ended_at
  @ended_at
end

#events_log_path ⇒ Object (readonly)

Returns the value of attribute events_log_path.



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# File 'lib/harnex/runtime/session.rb', line 60

def events_log_path
  @events_log_path
end

#exit_code ⇒ Object (readonly)

Returns the value of attribute exit_code.



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# File 'lib/harnex/runtime/session.rb', line 60

def exit_code
  @exit_code
end

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/harnex/runtime/session.rb', line 60

def host
  @host
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/harnex/runtime/session.rb', line 60

def id
  @id
end

#inbox ⇒ Object (readonly)

Returns the value of attribute inbox.



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# File 'lib/harnex/runtime/session.rb', line 60

def inbox
  @inbox
end

#launch_cwd ⇒ Object (readonly)

Returns the value of attribute launch_cwd.



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# File 'lib/harnex/runtime/session.rb', line 60

def launch_cwd
  @launch_cwd
end

#meta ⇒ Object (readonly)

Returns the value of attribute meta.



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# File 'lib/harnex/runtime/session.rb', line 60

def meta
  @meta
end

#output_log_path ⇒ Object (readonly)

Returns the value of attribute output_log_path.



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# File 'lib/harnex/runtime/session.rb', line 60

def output_log_path
  @output_log_path
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/harnex/runtime/session.rb', line 60

def pid
  @pid
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/harnex/runtime/session.rb', line 60

def port
  @port
end

#repo_root ⇒ Object (readonly)

Returns the value of attribute repo_root.



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# File 'lib/harnex/runtime/session.rb', line 60

def repo_root
  @repo_root
end

#session_id ⇒ Object (readonly)

Returns the value of attribute session_id.



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# File 'lib/harnex/runtime/session.rb', line 60

def session_id
  @session_id
end

#started_at ⇒ Object (readonly)

Returns the value of attribute started_at.



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# File 'lib/harnex/runtime/session.rb', line 60

def started_at
  @started_at
end

#summary_out ⇒ Object (readonly)

Returns the value of attribute summary_out.



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# File 'lib/harnex/runtime/session.rb', line 60

def summary_out
  @summary_out
end

#term_signal ⇒ Object (readonly)

Returns the value of attribute term_signal.



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# File 'lib/harnex/runtime/session.rb', line 60

def term_signal
  @term_signal
end

#token ⇒ Object (readonly)

Returns the value of attribute token.



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# File 'lib/harnex/runtime/session.rb', line 60

def token
  @token
end

#watch ⇒ Object (readonly)

Returns the value of attribute watch.



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# File 'lib/harnex/runtime/session.rb', line 60

def watch
  @watch
end

Class Method Details

.validate_binary!(command) ⇒ Object

Raises:



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# File 'lib/harnex/runtime/session.rb', line 124

def self.validate_binary!(command)
  binary = Array(command).first.to_s
  raise BinaryNotFound, "\"\" not found — is it installed and on your PATH?" if binary.empty?

  if binary.include?("/")
    return binary if File.executable?(binary) && !File.directory?(binary)

    raise BinaryNotFound, "\"#{binary}\" not found — is it installed and on your PATH?"
  end

  ENV.fetch("PATH", "").split(File::PATH_SEPARATOR).each do |dir|
    path = File.join(dir, binary)
    return path if File.executable?(path) && !File.directory?(path)
  end

  raise BinaryNotFound, "\"#{binary}\" not found — is it installed and on your PATH?"
end

Instance Method Details

#auth_ok?(header) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/harnex/runtime/session.rb', line 245

def auth_ok?(header)
  header == "Bearer #{token}"
end

#git_end ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 241

def git_end
  @git_end || {}
end

#git_start ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 237

def git_start
  @git_start || {}
end

#inject(text, newline: true) ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 249

def inject(text, newline: true)
  raise "session is not running" unless pid && Harnex.alive_pid?(pid)

  inject_sequence([{ text: text, newline: newline }])
end

#inject_stop(turn_id: nil) ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 255

def inject_stop(turn_id: nil)
  unless structured_transport?
    raise "session is not running" unless pid && Harnex.alive_pid?(pid)
  end

  return { ok: true, signal: "already_requested" } if stop_requested!

  if structured_transport?
    if adapter.respond_to?(:terminate_subprocess)
      Thread.new do
        begin
          adapter.terminate_subprocess
        rescue Errno::ESRCH, StandardError
          nil
        end
      end
    end
    @inject_mutex.synchronize do
      begin
        adapter.interrupt(turn_id: turn_id)
      rescue StandardError
        nil
      end
      @state_machine.force_busy!
    end
    return { ok: true, signal: "interrupt_sent" }
  end

  @inject_mutex.synchronize do
    adapter.inject_exit(@writer)
    @state_machine.force_busy!
  end

  { ok: true, signal: "exit_sequence_sent" }
end

#inject_via_adapter(text:, submit:, enter_only:, force: false) ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 291

def inject_via_adapter(text:, submit:, enter_only:, force: false)
  if structured_transport?
    return inject_via_structured(text: text, submit: submit, enter_only: enter_only, force: force)
  end

  snapshot = adapter.wait_for_sendable(method(:screen_snapshot), submit: submit, enter_only: enter_only, force: force)
  payload = adapter.build_send_payload(
    text: text,
    submit: submit,
    enter_only: enter_only,
    screen_text: snapshot,
    force: force
  )

  result =
    if payload[:steps]
      inject_sequence(payload.fetch(:steps))
    else
      inject(payload.fetch(:text), newline: payload.fetch(:newline, false))
    end

  result.merge(
    cli: adapter.key,
    input_state: payload[:input_state],
    force: payload[:force]
  )
    .tap { emit_send_event(text, force: payload[:force]) }
end

#inject_via_structured(text:, submit:, enter_only:, force: false) ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 320

def inject_via_structured(text:, submit:, enter_only:, force: false)
  payload = adapter.build_send_payload(
    text: text,
    submit: submit,
    enter_only: enter_only,
    screen_text: nil,
    force: force
  )
  dispatch = payload.fetch(:dispatch).dup
  dispatch[:model] = meta_hash["model"] if meta_hash["model"] && !dispatch.key?(:model)
  dispatch[:effort] = meta_hash["effort"] if meta_hash["effort"] && !dispatch.key?(:effort)

  turn_id = nil
  @inject_mutex.synchronize do
    turn_id = adapter.dispatch(**dispatch)
    @state_machine.force_busy!
    @injected_count += 1
    @last_injected_at = Time.now
    persist_registry
  end

  emit_send_event(dispatch.fetch(:prompt, text), force: payload[:force])
  {
    ok: true,
    cli: adapter.key,
    bytes_written: dispatch.fetch(:prompt, text).to_s.bytesize,
    injected_count: @injected_count,
    newline: false,
    input_state: payload[:input_state],
    force: payload[:force],
    turn_id: turn_id
  }
end

#run(validate_binary: true) ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 142

def run(validate_binary: true)
  validate_binary! if validate_binary
  prepare_output_log
  prepare_events_log

  return run_structured if structured_transport?

  run_pty
end

#run_pty ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 152

def run_pty
  @reader, @writer, @pid = PTY.spawn(child_env, *command)
  @writer.sync = true
  arm_auto_stop_after_initial_context
  emit_started_event
  emit_git_start_event

  install_signal_handlers
  sync_window_size
  @server = ApiServer.new(self)
  @server.start
  persist_registry

  stdin_state = STDIN.tty? ? STDIN.raw! : nil
  watch_thread = start_watch_thread
  @inbox.start
  input_thread = start_input_thread
  output_thread = start_output_thread

  _, status = Process.wait2(pid)
  @term_signal = status.signaled? ? status.termsig : nil
  @exit_code = status.exited? ? status.exitstatus : 128 + status.termsig
  @ended_at = Time.now

  normalize_auto_stop_exit_code!
  drain_auto_stop_threads
  output_thread.join(1)
  finalize_session!
  input_thread&.kill
  watch_thread&.kill
  @exit_code
ensure
  finalize_session!
  @inbox.stop
  STDIN.cooked! if STDIN.tty? && stdin_state
  @server&.stop
  persist_exit_status
  cleanup_registry
  @reader&.close unless @reader&.closed?
  @output_log&.close unless @output_log&.closed?
  @events_log&.close unless @events_log&.closed?
  @writer&.close unless @writer&.closed?
end

#status_payload(include_input_state: true) ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 196

def status_payload(include_input_state: true)
  payload = {
    ok: true,
    session_id: session_id,
    repo_root: repo_root,
    repo_key: Harnex.repo_key(repo_root),
    cli: adapter.key,
    id: id,
    pid: pid,
    host: host,
    port: port,
    command: command,
    started_at: @started_at.iso8601,
    last_injected_at: @last_injected_at&.iso8601,
    injected_count: @injected_count,
    output_log_path: output_log_path,
    events_log_path: events_log_path
  }
  payload.merge!(log_activity_snapshot)
  payload[:description] = description if description

  if watch
    payload[:watch_path] = watch.display_path
    payload[:watch_absolute_path] = watch.absolute_path
    payload[:watch_debounce_seconds] = watch.debounce_seconds
  end

  payload[:input_state] = adapter.input_state(screen_snapshot) if include_input_state
  payload[:agent_state] = @state_machine.to_s
  payload[:inbox] = @inbox.stats
  payload[:last_completed_at] = @last_completed_at&.iso8601
  payload[:model] = summary_model
  payload[:effort] = meta_hash["effort"]
  payload[:auto_disconnects] = @event_counters.snapshot[:disconnections]
  payload
end

#sync_window_size ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 354

def sync_window_size
  return unless STDIN.tty?
  return unless @writer

  @writer.winsize = STDIN.winsize
rescue StandardError
  nil
end

#task_complete? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/harnex/runtime/session.rb', line 233

def task_complete?
  !!@last_completed_at
end

#validate_binary! ⇒ Object 



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# File 'lib/harnex/runtime/session.rb', line 363

def validate_binary!
  self.class.validate_binary!(command)
end