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Include whatis description for kernel modules in kldload completions

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Using `__fish_whatis` based on a heuristic to make sure completions are
timely available.
This commit is contained in:
Mahmoud Al-Qudsi 2018-06-27 14:38:51 -05:00
parent 121c70cf39
commit 092307d4c0
1 changed files with 26 additions and 5 deletions
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31
share/completions/kldload.fish
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@ -1,9 +1,30 @@
# Completions for the FreeBSD `kldload` kernel module load utility
function __fish_list_kldload_options
set -l klds (__fish_complete_suffix /boot/kernel/(commandline -ct) ".ko" | string replace -r '.*/(.+)\\.ko' '$1');
# Completing available klds is fast, but completing it with a call to __fish_whatis
# is decidedly not. With 846 modules (FreeBSD 11.1), fish --profile 'complete -C"kldload "' returns the following:
# 10671 11892698 > complete -C"kldload "
# A 12 second completion delay is obviously out of the question, so don't provide a description unless there are
# fewer than 50 results.
# Additionally, we can halve the time by not shelling out to `whatis` if we know the man file for the kernel module
# in question does not exist, since the paths are hardcoded.
set -l kld_count (count $klds)
if test $kld_count -le 50 -a $kld_count -gt 0
# print name and description
for kld in $klds
printf '%s\t%s\n' $kld (test -e /usr/share/man/man4/$kld.4.gz;
and __fish_whatis $kld; or echo "kernel module")
end
else if test $kld_count -gt 0
# print name only
printf '%s\n' $klds
else
# print name only (description won't exist since the kernel module isn't installed)
__fish_complete_suffix .ko
end
end
# Only attempt to match a local file if there isn't a match in /boot/kernel,
# as odds are that is the desired source.
complete -c kldload -xa '(
set results (__fish_complete_suffix /boot/kernel/(commandline -ct) ".ko" | sed "s@.*/@@g;s/\.ko//");
set -q results[1]; and printf "%s\n" $results;
or __fish_complete_suffix .ko
)'
complete -c kldload -xa '(__fish_list_kldload_options)'