dotfiles/.local/bin/scripts/help

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#!/bin/sh
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# open info-page, man-page or command help
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# depends: unbuffer
# optdepends: highlight(dotfiles)
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
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info --vi-keys $(test "$last" != zsh && echo "--index-search=$last") zsh ||
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LESS="$LESS +/^ *$last *\\[" man zshall;;
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(gh|chordpro|bat|pdfjam|reflector|topgrade|r128gain|7z|kubectl) unbuffer "$@" --help | $paginate;;
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(caddy|stretchly|go) "$1" help "${@:2}" | $paginate;;
(rails) { rails -H && rails --help; } | $paginate;;
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(plantuml) unbuffer "$@" -help | $paginate;;
(vlc) unbuffer vlc --full-help "${@:2}" | $paginate;;
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(kdeconnect*) kdeconnect-cli --help-all "${@:2}" | $paginate;;
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(pandoc) man pandoc; highlight "Extensions" && pandoc --list-extensions | paste -s -d' ';;
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(swaymsg) test $# -gt 1 && man sway "${@:2}" || man swaymsg;;
(swaymsg-*) man sway "${1#swaymsg-}";;
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(*) { info "$1" -w | grep -v "manpages" && pinfo "$@"; } ||
man "$@" ||
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if which "$1" >/dev/null
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then { "$@" --help || { test $? == 1 && "$@" -help; } || { test $? == 1 && "$@" -h; }; } 2>&1 | $paginate
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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