From inside a process, how can I check if there are other processes to run?

[Luc45]

During the global setup phase, the first process that picks the lock creates a directory that must exist though the entire execution of the test.

For this reason, I need to keep that first process alive for the duration of the entire test.

How can I detect whether there are other parallel tests running, from inside the context of a subprocess?

Thanks!

[Luc45]

I ended up using lock files, too.

• Each subprocess that are not the first one creates a temporary lock file.
• Every time a subprocess finishes, it deletes their own lock file.
• The main process that won the race will glob that pattern and wait
• Every time a main process wins the race, it deletes all lock files to cleanup the initial state as well (eg: to account for CTRL+C on a last test run where subprocess didn't clean after itself, etc)