dotfiles/.local/bin/scripts/help

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#!/bin/sh
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# open info-page, man-page or command help
paginate="${PAGER:-less} +Gg"
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test "$1" = "-d" && browse=1 && shift
case $1 in
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(zsh|zmv) # https://unix.stackexchange.com/questions/19290/zmv-for-zsh-dry-runs-and-man-pages
for last; do true; done
# need to install zsh-doc package for info pages
info --vi-keys "$(test "$last" != zsh && echo "--index-search=$last")" zsh ||
LESS="$LESS +/^ *$last *\\[" man zshall;;
(vlc) unbuffer vlc --full-help "${@:2}" | $paginate;;
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(gh|chordpro|bat) unbuffer "$@" --help | $paginate;;
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(caddy|stretchly|go) "$1" help "${@:2}" | $paginate;;
(*) man "$@" ||
{ info "$1" -w | grep -v "manpages" && pinfo "$@"; } ||
if which "$1" >/dev/null; then "$@" --help || "$@" -help 2>&1 | $paginate; fi;;
esac
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docs="/usr/share/doc/$1"
if test -d "$docs"; then
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if test -z "$browse"
then echo "Find more in $docs"
else
len() { echo $1 | wc -c; }
shortest() {
read shortest
while read in
do test $(len $shortest) -gt $(len $in) && shortest=$in
done
echo $shortest
}
firefox "file://$(find $docs -name index.html | shortest | grep . || find $docs -name $1*.html | shortest)"
fi
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fi