Module: Bundler::Codegraph::Subprocess

Defined in:

lib/bundler/codegraph/subprocess.rb

Overview

Runs codegraph as a child process, stdin and stdout closed off.

Kernel#system would leave the child running when this process alone is interrupted (SIGTERM to Ruby, not its process group): the cleanup that follows — removing a partial index, releasing the lock — would then happen under a live codegraph. The child is stopped and reaped first.

Constant Summary

STOP_TIMEOUT =

How long a child gets to exit on TERM before it is killed.

5

Class Method Summary

• .run(argv, stderr) ⇒ Boolean^?

  Like system, except that a child killed by a signal (the OOM killer) gives nil, as one that cannot be started: it did not fail, it was stopped.

Class Method Details

.run(argv, stderr) ⇒ Boolean^?

Returns like system, except that a child killed by a signal (the OOM killer) gives nil, as one that cannot be started: it did not fail, it was stopped.

Parameters:

• argv (Array<String>) —

  command line

• stderr (IO, String) —

  where the child's error output goes

Returns:

• (Boolean, nil) —

  like system, except that a child killed by a signal (the OOM killer) gives nil, as one that cannot be started: it did not fail, it was stopped

# File 'lib/bundler/codegraph/subprocess.rb', line 22

def self.run(argv, stderr)
  pid = Process.spawn(*argv, in: File::NULL, out: File::NULL, err: stderr)
  status = Process.wait2(pid).last
  pid = nil
  status.success? || (status.signaled? ? nil : false)
rescue SystemCallError
  nil
ensure
  stop(pid) if pid
end