Module: SimpleCov::ProcessForkHook

Defined in:
lib/simplecov/process.rb

Overview

Prepended onto Process's singleton class so every fork re-runs SimpleCov's at_fork callback in the child. Process._fork is the official extension point: Kernel#fork, Process.fork, and IO.popen("-") all funnel through it, and prepending composes with other libraries doing the same.

Instance Method Summary collapse

Instance Method Details

#_fork ⇒ Object

The next serial is assigned in the parent, before the fork, so the child inherits its own stable ordinal via copy-on-write, and the child is marked here independent of whatever custom at_fork block the user installed so final_result_process? can keep forked workers from each producing the final report (#1171, #1227).



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# File 'lib/simplecov/process.rb', line 27

def _fork
  active = defined?(SimpleCov) && Coverage.running?
  SimpleCov.next_subprocess_serial! if active
  pid = super
  if pid.zero? && active
    SimpleCov.mark_forked_subprocess!
    SimpleCov.reset_inherited_at_exit_state!
    SimpleCov.at_fork.call(::Process.pid)
  end
  pid
end