TODO #!/usr/bin/env bash

# Provides an "atexit" mechanism for scripts.

# Array of commands to eval.
declare -a __atexit_cmds = ''

# Helper for eval'ing commands.
proc __atexit {
    for cmd in [$(__atexit_cmds[@])] {
        eval $(cmd)
    }
}

# Usage: atexit command arg1 arg2 arg3
proc atexit {
    # Determine the current number of commands.
    var length = $(#__atexit_cmds[*])

    # Add this command to the end.
    setglobal __atexit_cmds[${length}]="${*}"

    # Set the trap handler if this was the first command added.
    if [[ ${length} -eq 0 ]] {
        trap __atexit EXIT
    }
}