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## vim:ft=zsh
## reverse tabbing, useful in the prompt
## Copyright (C) 2008, 2009 by Daniel Friesel <derf@derf.homelinux.org>
## License: WTFPL <http://sam.zoy.org/wtfpl>
## CAVEAT: directory-names containing two or more consecutive spaces
## are not yet supported
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})
(
unfunction chpwd 2> /dev/null
# Start either in the currrent named directory or in /
if [[ $tree[1] == \~* ]] {
cd ${~tree[1]}
result=$tree[1]
shift tree
} else {
cd /
}
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 $dir
shift tree
}
echo ${result:-/}
)
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