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Add shrink-path plugin to shorten directory paths (e.g. ~/f/b/quux) (#5262)

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* Add shrink-path plugin to shorten directory paths (e.g. ~/f/b/quux)

* Add a README
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Shiv Venkatasubrahmanyam 2016-08-10 17:44:00 -07:00 committed by Marc Cornellà
parent a9428b137f
commit c09323098a
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# A plugin to shrink directory paths for brevity and pretty-printing
## Examples
For this directory tree:
```
/home/
me/
foo/
bar/
quux/
biz/ # The prefix b is ambiguous between bar and biz.
```
here are the results of calling `shrink_path <option> /home/me/foo/bar/quux`:
```
Option Result
<none> /h/m/f/ba/q
-l|--last /h/m/f/ba/quux
-s|--short /h/m/f/b/q
-t|--tilde ~/f/ba/q
-f|--fish ~/f/b/quux
```
## Usage
For a fish-style working directory in your command prompt, add the following to
your theme or zshrc:
```
setopt prompt_subst
PS1='%n@%m $(shrink_path -f)>'
```
The following options are available:
```
-f, --fish fish simulation, equivalent to -l -s -t.
-l, --last Print the last directory's full name.
-s, --short Truncate directory names to the first character. Without
-s, names are truncated without making them ambiguous.
-t, --tilde Substitute ~ for the home directory.
-T, --nameddirs Substitute named directories as well.
```
The long options can also be set via zstyle, like
```
zstyle :prompt:shrink_path fish yes
```
Note: Directory names containing two or more consecutive spaces are not yet
supported.
## License
Copyright (C) 2008 by Daniel Friesel <derf@xxxxxxxxxxxxxxxxxx>
License: WTFPL <http://sam.zoy.org/wtfpl>
Ref: http://www.zsh.org/mla/workers/2009/msg00415.html
http://www.zsh.org/mla/workers/2009/msg00419.html
## Misc
Keywords: prompt directory truncate shrink collapse fish

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# Shrink directory paths, e.g. /home/me/foo/bar/quux -> ~/f/b/quux.
#
# For a fish-style working directory in your command prompt, add the following
# to your theme or zshrc:
#
# setopt prompt_subst
# PS1='%n@%m $(shrink_path -f)>'
#
# The following options are available:
#
# -f, --fish fish simulation, equivalent to -l -s -t.
# -l, --last Print the last directory's full name.
# -s, --short Truncate directory names to the first character. Without
# -s, names are truncated without making them ambiguous.
# -t, --tilde Substitute ~ for the home directory.
# -T, --nameddirs Substitute named directories as well.
#
# The long options can also be set via zstyle, like
# zstyle :prompt:shrink_path fish yes
#
# Note: Directory names containing two or more consecutive spaces are not yet
# supported.
#
# Keywords: prompt directory truncate shrink collapse fish
#
# Copyright (C) 2008 by Daniel Friesel <derf@xxxxxxxxxxxxxxxxxx>
# License: WTFPL <http://sam.zoy.org/wtfpl>
#
# Ref: http://www.zsh.org/mla/workers/2009/msg00415.html
# http://www.zsh.org/mla/workers/2009/msg00419.html
shrink_path () {
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:shrink_path' fish; then
lastfull=1
short=1
tilde=1
fi
if zstyle -t ':prompt:shrink_path' nameddirs; then
tilde=1
named=1
fi
zstyle -t ':prompt:shrink_path' last && lastfull=1
zstyle -t ':prompt:shrink_path' short && short=1
zstyle -t ':prompt:shrink_path' tilde && tilde=1
while [[ $1 == -* ]]; do
case $1 in
-f|--fish)
lastfull=1
short=1
tilde=1
;;
-h|--help)
print 'Usage: shrink_path [-f -l -s -t] [directory]'
print ' -f, --fish fish-simulation, like -l -s -t'
print ' -l, --last Print the last directory''s full name'
print ' -s, --short Truncate directory names to the first character'
print ' -t, --tilde Substitute ~ for the home directory'
print ' -T, --nameddirs Substitute named directories as well'
print 'The long options can also be set via zstyle, like'
print ' zstyle :prompt:shrink_path fish yes'
return 0
;;
-l|--last) lastfull=1 ;;
-s|--short) short=1 ;;
-t|--tilde) tilde=1 ;;
-T|--nameddirs)
tilde=1
named=1
;;
esac
shift
done
typeset -a tree expn
typeset result part dir=${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
if [[ $tree[1] == \~* ]] {
cd ${~tree[1]}
result=$tree[1]
shift tree
} else {
cd /
}
for dir in $tree; {
if (( lastfull && $#tree == 1 )) {
result+="/$tree"
break
}
expn=(a b)
part=''
i=0
until [[ (( ${#expn} == 1 )) || $dir = $expn || $i -gt 99 ]] do
(( i++ ))
part+=$dir[$i]
expn=($(echo ${part}*(-/)))
(( short )) && break
done
result+="/$part"
cd $dir
shift tree
}
echo ${result:-/}
)
}
## vim:ft=zsh