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## vim:ft=zsh
## wrapper around man, finfo, etc
## Usage: help <topic>
typeset -a methods
typeset method topic
typeset -i found check_only all
methods=(man zshfunction zshbuiltin apt)
while [[ ${1} == -* ]] {
case ${1} in
-a|--all) all=1 ;;
-c|--check-only) check_only=1 ;;
-t|--topic) topic=${2}; shift ;;
-|--) shift; break ;;
*) echo "unknown option: ${1}" ;;
esac
shift
}
function help_check_man { man -w ${1} &> /dev/null }
function help_check_zshfunction { whichf ${1} &> /dev/null }
function help_check_zshbuiltin { (( ${+builtins[$1]} )) }
function help_check_apt {
[[ ${commands[$1]} != ${HOME}* ]] && [[ -n ${commands[$1]} ]] && [[ -n ${commands[apt-file]} ]]
}
function help_show_man { man ${1} }
function help_show_zshfunction { finfo ${1} }
function help_show_zshbuiltin { man zshbuiltins | less -p " ${1}" }
function help_show_apt {
apt-cache show ${(s/:/)$(apt-file search -F ${commands[$1]})[1]}
}
if [[ -z ${1} ]] {
echo "Usage: help <command>" > /dev/stderr
return 1
}
for method in ${methods}; {
if [[ -n ${topic} && ${method} != ${topic} ]] {
continue
}
if help_check_${method} ${1}; then
((found++))
if ((check_only)) {
echo ${method}
continue
}
help_show_${method} ${1}
((all)) || break
fi
}
if ((found == 0)) {
echo "Sorry, no clue." > /dev/stderr
return 1
}
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