Module: Ocak::ProcessRunner

Defined in:
lib/ocak/process_runner.rb

Overview

Runs a subprocess with streaming line output and timeout support.

Class Method Summary collapse

Class Method Details

.kill_process(pid) ⇒ Object 



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# File 'lib/ocak/process_runner.rb', line 48

def kill_process(pid)
  Process.kill('TERM', pid)
  sleep 2
  Process.kill('KILL', pid)
rescue Errno::ESRCH => e
  warn("Process already exited during kill: #{e.message}")
  nil
end

.process_lines(line_buf, chunk, on_line) ⇒ Object 



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# File 'lib/ocak/process_runner.rb', line 75

def process_lines(line_buf, chunk, on_line)
  return unless on_line

  line_buf << chunk
  while (idx = line_buf.index("\n"))
    on_line.call(line_buf.slice!(0, idx + 1).chomp)
  end
end

.read_available(readers, remaining, ctx) ⇒ Object 



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# File 'lib/ocak/process_runner.rb', line 57

def read_available(readers, remaining, ctx)
  ready = IO.select(readers, nil, nil, [remaining, 1].min)
  return unless ready

  ready[0].each do |io|
    chunk = io.read_nonblock(8192)
    if io == readers[0]
      ctx[:stdout] << chunk
      process_lines(ctx[:line_buf], chunk, ctx[:on_line])
    else
      ctx[:stderr] << chunk
    end
  rescue EOFError => e
    warn("Stream EOF for subprocess IO: #{e.message}")
    readers.delete(io)
  end
end

.read_streams(out, err, ctx) ⇒ Object 



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# File 'lib/ocak/process_runner.rb', line 31

def read_streams(out, err, ctx)
  readers = [out, err]

  until readers.empty?
    remaining = ctx[:deadline] ? ctx[:deadline] - Process.clock_gettime(Process::CLOCK_MONOTONIC) : 5

    if ctx[:deadline] && remaining <= 0
      kill_process(ctx[:wait_thr].pid)
      return ['', "Timed out after #{ctx[:timeout]}s", +'']
    end

    read_available(readers, remaining, ctx)
  end

  [ctx[:stdout], ctx[:stderr], ctx[:line_buf]]
end

.run(cmd, chdir:, timeout: nil, on_line: nil) ⇒ Object 



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# File 'lib/ocak/process_runner.rb', line 10

def run(cmd, chdir:, timeout: nil, on_line: nil)
  stdout = +''
  stderr = +''
  line_buf = +''

  Open3.popen3(*cmd, chdir: chdir) do |stdin, out, err, wait_thr|
    stdin.close
    ctx = {
      stdout: +'', stderr: +'', line_buf: +'',
      deadline: timeout ? Process.clock_gettime(Process::CLOCK_MONOTONIC) + timeout : nil,
      timeout: timeout, wait_thr: wait_thr, on_line: on_line
    }

    stdout, stderr, line_buf = read_streams(out, err, ctx)
    on_line&.call(line_buf.chomp) unless line_buf.empty?
    [stdout, stderr, wait_thr.value]
  end
rescue Errno::ENOENT => e
  ['', e.message, ClaudeRunner::FailedStatus.instance]
end