Useful as a way to isolate a global change to a subprocess.
# File lib/rspec/support/spec/in_sub_process.rb, line 6 def in_sub_process readme, writeme = IO.pipe pid = Process.fork do exception = nil begin yield rescue Exception => e exception = e end writeme.write Marshal.dump(exception) readme.close writeme.close exit! # prevent at_exit hooks from running (e.g. minitest) end writeme.close Process.waitpid(pid) exception = Marshal.load(readme.read) readme.close raise exception if exception end
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