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## vim:ft=zsh
## reverse tabbing, useful in the prompt
## Copyright (C) 2008, 2009 by Daniel Friesel <derf@finalrewind.org>
## License: WTFPL <http://sam.zoy.org/wtfpl>
## CAVEAT: directory-names containing two or more consecutive spaces
## are not yet supported
function rtab
{
setopt localoptions
setopt rc_quotes null_glob
typeset -i lastfull=0
typeset -i short=0
typeset -i tilde=0
typeset -i named=0
if zstyle -t ':prompt:rtab' fish; then
lastfull=1
short=1
tilde=1
fi
if zstyle -t ':prompt:rtab' nameddirs; then
tilde=1
named=1
fi
zstyle -t ':prompt:rtab' last && lastfull=1
zstyle -t ':prompt:rtab' short && short=1
zstyle -t ':prompt:rtab' tilde && tilde=1
while [[ ${1} == -* ]]; do
case ${1} in
-f|--fish)
lastfull=1
short=1
tilde=1
;;
-h|--help)
print 'Usage: rtab [-f -l -s -t] [directory]'
print ' -f, --fish fish-simulation, like -l -s -t'
print ' -l, --last Print the last directory''s full name'
print ' -s, --short Truncate directory names to the first character'
print ' -t, --tilde Substitute ~ for the home directory'
print ' -T, --nameddirs Substitute named directories as well'
print 'The long options can also be set via zstyle, like'
print ' zstyle :prompt:rtab fish yes'
return 0
;;
-l|--last) lastfull=1 ;;
-s|--short) short=1 ;;
-t|--tilde) tilde=1 ;;
-T|--nameddirs)
tilde=1
named=1
;;
-|--)
shift
break
;;
esac
shift
done
typeset -a tree expn
typeset result part dir=${1-${PWD}}
typeset -i i
[[ -d ${dir} ]] || return 0
if (( named )) {
for part in ${(k)nameddirs}; {
[[ ${dir} == ${nameddirs[$part]}(/*|) ]] && dir=${dir/${nameddirs[$part]}/\~${part}}
}
}
(( tilde )) && dir=${dir/#${HOME}/\~}
tree=(${(s:/:)dir})
(
# Start either in the currrent named directory or in /
if [[ ${tree[1]} == \~* ]] {
cd -q ${~tree[1]}
result=${tree[1]}
shift tree
} else {
cd -q /
}
for dir in ${tree}; {
if (( lastfull && ${#tree} == 1 )) {
result+="/${tree}"
break
}
# required for the until loop
expn=(a b)
part=''
i=0
until [[ (( ${#expn} == 1 )) || ${dir} == ${expn} || ${i} -gt 99 ]] do
(( i++ ))
part+=${dir[$i]}
expn=($(echo ${part}*(-/)))
# Never show a single . as directory
if [[ ${i} == 1 && ${dir[$i]} == . ]] {
expn=(a b)
} elif [[ ${short} == 1 ]] {
break
}
done
result+="/${part}"
cd -q ${dir}
shift tree
}
echo ${result:-/}
)
}
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