test-lib.sh: add "atexit" functionality
New function at_exit_function registers given function to be called
at script termination.
Functions so registered are called in the reverse order of their
registration; no arguments are passed.
Function is called only once; re-adding with function name already
registered will remove previous registration.
New function rm_exit_function can be used to remove registration.
Modules (and possibly test-lib.sh functions) in future commits will
register such functions.
projects / notmuch.git / commit