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@@ -0,0 +1,228 @@
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+# Copyright (c) 2009 rupa deadwyler under the WTFPL license
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+
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+# maintains a jump-list of the directories you actually use
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+#
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+# INSTALL:
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+# * put something like this in your .bashrc/.zshrc:
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+# . /path/to/z.sh
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+# * cd around for a while to build up the db
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+# * PROFIT!!
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+# * optionally:
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+# set $_Z_CMD in .bashrc/.zshrc to change the command (default z).
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+# set $_Z_DATA in .bashrc/.zshrc to change the datafile (default ~/.z).
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+# set $_Z_NO_RESOLVE_SYMLINKS to prevent symlink resolution.
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+# set $_Z_NO_PROMPT_COMMAND if you're handling PROMPT_COMMAND yourself.
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+# set $_Z_EXCLUDE_DIRS to an array of directories to exclude.
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+#
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+# USE:
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+# * z foo # cd to most frecent dir matching foo
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+# * z foo bar # cd to most frecent dir matching foo and bar
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+# * z -r foo # cd to highest ranked dir matching foo
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+# * z -t foo # cd to most recently accessed dir matching foo
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+# * z -l foo # list matches instead of cd
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+# * z -c foo # restrict matches to subdirs of $PWD
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+
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+case $- in
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+ *i*) ;;
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+ *) echo 'ERROR: z.sh is meant to be sourced, not directly executed.'
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+esac
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+
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+[ -d "${_Z_DATA:-$HOME/.z}" ] && {
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+ echo "ERROR: z.sh's datafile (${_Z_DATA:-$HOME/.z}) is a directory."
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+}
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+
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+_z() {
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+
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+ local datafile="${_Z_DATA:-$HOME/.z}"
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+
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+ # bail out if we don't own ~/.z (we're another user but our ENV is still set)
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+ [ -f "$datafile" -a ! -O "$datafile" ] && return
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+
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+ # add entries
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+ if [ "$1" = "--add" ]; then
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+ shift
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+
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+ # $HOME isn't worth matching
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+ [ "$*" = "$HOME" ] && return
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+
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+ # don't track excluded dirs
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+ local exclude
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+ for exclude in "${_Z_EXCLUDE_DIRS[@]}"; do
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+ [ "$*" = "$exclude" ] && return
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+ done
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+
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+ # maintain the file
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+ local tempfile
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+ tempfile="$(mktemp "$datafile.XXXXXX")" || return
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+ while read line; do
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+ [ -d "${line%%\|*}" ] && echo $line
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+ done < "$datafile" | awk -v path="$*" -v now="$(date +%s)" -F"|" '
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+ BEGIN {
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+ rank[path] = 1
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+ time[path] = now
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+ }
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+ $2 >= 1 {
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+ if( $1 == path ) {
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+ rank[$1] = $2 + 1
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+ time[$1] = now
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+ } else {
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+ rank[$1] = $2
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+ time[$1] = $3
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+ }
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+ count += $2
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+ }
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+ END {
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+ if( count > 6000 ) {
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+ for( i in rank ) print i "|" 0.99*rank[i] "|" time[i] # aging
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+ } else for( i in rank ) print i "|" rank[i] "|" time[i]
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+ }
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+ ' 2>/dev/null >| "$tempfile"
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+ if [ $? -ne 0 -a -f "$datafile" ]; then
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+ env rm -f "$tempfile"
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+ else
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+ env mv -f "$tempfile" "$datafile"
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+ fi
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+
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+ # tab completion
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+ elif [ "$1" = "--complete" ]; then
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+ while read line; do
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+ [ -d "${line%%\|*}" ] && echo $line
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+ done < "$datafile" | awk -v q="$2" -F"|" '
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+ BEGIN {
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+ if( q == tolower(q) ) nocase = 1
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+ split(substr(q,3),fnd," ")
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+ }
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+ {
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+ if( nocase ) {
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+ for( i in fnd ) tolower($1) !~ tolower(fnd[i]) && $1 = ""
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+ } else {
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+ for( i in fnd ) $1 !~ fnd[i] && $1 = ""
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+ }
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+ if( $1 ) print $1
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+ }
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+ ' 2>/dev/null
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+
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+ else
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+ # list/go
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+ while [ "$1" ]; do case "$1" in
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+ --) while [ "$1" ]; do shift; local fnd="$fnd $1";done;;
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+ -*) local opt=${1:1}; while [ "$opt" ]; do case ${opt:0:1} in
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+ c) local fnd="^$PWD $fnd";;
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+ h) echo "${_Z_CMD:-z} [-chlrt] args" >&2; return;;
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+ l) local list=1;;
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+ r) local typ="rank";;
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+ t) local typ="recent";;
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+ esac; opt=${opt:1}; done;;
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+ *) local fnd="$fnd $1";;
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+ esac; local last=$1; shift; done
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+ [ "$fnd" -a "$fnd" != "^$PWD " ] || local list=1
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+
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+ # if we hit enter on a completion just go there
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+ case "$last" in
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+ # completions will always start with /
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+ /*) [ -z "$list" -a -d "$last" ] && cd "$last" && return;;
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+ esac
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+
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+ # no file yet
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+ [ -f "$datafile" ] || return
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+
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+ local cd
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+ cd="$(while read line; do
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+ [ -d "${line%%\|*}" ] && echo $line
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+ done < "$datafile" | awk -v t="$(date +%s)" -v list="$list" -v typ="$typ" -v q="$fnd" -F"|" '
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+ function frecent(rank, time) {
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+ dx = t-time
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+ if( dx < 3600 ) return rank*4
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+ if( dx < 86400 ) return rank*2
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+ if( dx < 604800 ) return rank/2
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+ return rank/4
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+ }
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+ function output(files, toopen, override) {
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+ if( list ) {
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+ cmd = "sort -n >&2"
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+ for( i in files ) if( files[i] ) printf "%-10s %s\n", files[i], i | cmd
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+ if( override ) printf "%-10s %s\n", "common:", override > "/dev/stderr"
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+ } else {
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+ if( override ) toopen = override
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+ print toopen
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+ }
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+ }
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+ function common(matches) {
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+ # shortest match
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+ for( i in matches ) {
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+ if( matches[i] && (!short || length(i) < length(short)) ) short = i
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+ }
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+ if( short == "/" ) return
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+ # shortest match must be common to each match. escape special characters in
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+ # a copy when testing, so we can return the original.
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+ clean_short = short
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+ gsub(/[\(\)\[\]\|]/, "\\\\&", clean_short)
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+ for( i in matches ) if( matches[i] && i !~ clean_short ) return
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+ return short
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+ }
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+ BEGIN { split(q, a, " "); oldf = noldf = -9999999999 }
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+ {
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+ if( typ == "rank" ) {
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+ f = $2
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+ } else if( typ == "recent" ) {
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+ f = $3-t
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+ } else f = frecent($2, $3)
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+ wcase[$1] = nocase[$1] = f
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+ for( i in a ) {
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+ if( $1 !~ a[i] ) delete wcase[$1]
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+ if( tolower($1) !~ tolower(a[i]) ) delete nocase[$1]
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+ }
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+ if( wcase[$1] && wcase[$1] > oldf ) {
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+ cx = $1
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+ oldf = wcase[$1]
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+ } else if( nocase[$1] && nocase[$1] > noldf ) {
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+ ncx = $1
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+ noldf = nocase[$1]
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+ }
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+ }
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+ END {
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+ if( cx ) {
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+ output(wcase, cx, common(wcase))
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+ } else if( ncx ) output(nocase, ncx, common(nocase))
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+ }
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+ ')"
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+ [ $? -gt 0 ] && return
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+ [ "$cd" ] && cd "$cd"
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+ fi
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+}
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+
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+alias ${_Z_CMD:-z}='_z 2>&1'
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+
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+[ "$_Z_NO_RESOLVE_SYMLINKS" ] || _Z_RESOLVE_SYMLINKS="-P"
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+
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+if compctl &> /dev/null; then
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+ [ "$_Z_NO_PROMPT_COMMAND" ] || {
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+ # zsh populate directory list, avoid clobbering any other precmds
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+ if [ "$_Z_NO_RESOLVE_SYMLINKS" ]; then
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+ _z_precmd() {
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+ _z --add "${PWD:a}"
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+ }
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+ else
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+ _z_precmd() {
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+ _z --add "${PWD:A}"
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+ }
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+ fi
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+ precmd_functions+=(_z_precmd)
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+ }
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+ # zsh tab completion
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+ _z_zsh_tab_completion() {
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+ local compl
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+ read -l compl
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+ reply=(${(f)"$(_z --complete "$compl")"})
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+ }
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+ compctl -U -K _z_zsh_tab_completion _z
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+elif complete &> /dev/null; then
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+ # bash tab completion
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+ complete -o filenames -C '_z --complete "$COMP_LINE"' ${_Z_CMD:-z}
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+ [ "$_Z_NO_PROMPT_COMMAND" ] || {
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+ # bash populate directory list. avoid clobbering other PROMPT_COMMANDs.
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+ echo $PROMPT_COMMAND | grep -q "_z --add" || {
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+ PROMPT_COMMAND='_z --add "$(pwd '$_Z_RESOLVE_SYMLINKS' 2>/dev/null)" 2>/dev/null;'"$PROMPT_COMMAND"
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+ }
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+ }
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+fi
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Robby Russell