How do I autocomplete nested, multi-level subcommands? [duplicate]
Here's an example script for your two-level case (with a section for subcommands of show to show how it's done - you can just delete those three lines if they're not relevant to your case):
_foo(){ local cur prev cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]} case ${COMP_CWORD} in 1) COMPREPLY=($(compgen -W "configure show" -- ${cur})) ;; 2) case ${prev} in configure) COMPREPLY=($(compgen -W "CM DSP NPU" -- ${cur})) ;; show) COMPREPLY=($(compgen -W "some other args" -- ${cur})) ;; esac ;; *) COMPREPLY=() ;; esac}complete -F _foo fooHopefully it's fairly obvious from that example how you'd extend it to three-level commands etc., as well.