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tools: bpftool: deal with options upfront

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Remove options (in getopt() sense, i.e. starting with a dash like
-n or --NAME) while parsing arguments for bash completions.  This
allows us to refer to position-dependent parameters better, and
complete options at any point.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2018-06-28 14:41:42 -07:00 committed by Daniel Borkmann
parent ef347a340b
commit 121c58bed0
1 changed files with 21 additions and 11 deletions
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32
tools/bpf/bpftool/bash-completion/bpftool
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@ -153,6 +153,13 @@ _bpftool()
local cur prev words objword
_init_completion || return
# Deal with options
if [[ ${words[cword]} == -* ]]; then
local c='--version --json --pretty --bpffs'
COMPREPLY=( $( compgen -W "$c" -- "$cur" ) )
return 0
fi
# Deal with simplest keywords
case $prev in
help|hex|opcodes|visual)
@ -172,20 +179,23 @@ _bpftool()
;;
esac
# Search for object and command
local object command cmdword
for (( cmdword=1; cmdword < ${#words[@]}-1; cmdword++ )); do
[[ -n $object ]] && command=${words[cmdword]} && break
[[ ${words[cmdword]} != -* ]] && object=${words[cmdword]}
# Remove all options so completions don't have to deal with them.
local i
for (( i=1; i < ${#words[@]}; )); do
if [[ ${words[i]::1} == - ]]; then
words=( "${words[@]:0:i}" "${words[@]:i+1}" )
[[ $i -le $cword ]] && cword=$(( cword - 1 ))
else
i=$(( ++i ))
fi
done
cur=${words[cword]}
prev=${words[cword - 1]}
if [[ -z $object ]]; then
local object=${words[1]} command=${words[2]}
if [[ -z $object || $cword -eq 1 ]]; then
case $cur in
-*)
local c='--version --json --pretty --bpffs'
COMPREPLY=( $( compgen -W "$c" -- "$cur" ) )
return 0
;;
*)
COMPREPLY=( $( compgen -W "$( bpftool help 2>&1 | \
command sed \