mirror of
https://github.com/notwa/rc
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237 lines
8.1 KiB
Bash
237 lines
8.1 KiB
Bash
# Copyright (c) 2009 rupa deadwyler under the WTFPL license
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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 $PWD
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[ -d "${_Z_DATA:-$HOME/.z}" ] && {
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echo "ERROR: z.sh's datafile (${_Z_DATA:-$HOME/.z}) is a directory."
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}
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_z() {
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local datafile="${_Z_DATA:-$HOME/.z}"
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# bail if we don't own ~/.z (we're another user but our ENV is still set)
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[ -f "$datafile" -a ! -O "$datafile" ] && return
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# add entries
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if [ "$1" = "--add" ]; then
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shift
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# $HOME isn't worth matching
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[ "$*" = "$HOME" ] && return
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# don't track excluded dirs
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local exclude
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for exclude in "${_Z_EXCLUDE_DIRS[@]}"; do
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[ "$*" = "$exclude" ] && return
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done
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# maintain the file
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local tempfile
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tempfile="$datafile.$RANDOM"
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while read line; do
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# only count directories
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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 += $2
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}
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END {
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if( count > 6000 ) {
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# aging
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for( i in rank ) print i "|" 0.99*rank[i] "|" time[i]
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} else for( i in rank ) print i "|" rank[i] "|" time[i]
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}
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' 2>/dev/null >| "$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" "$datafile" || env rm -f "$tmpfile"
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fi
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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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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} [-chlrtx] args" >&2; return;;
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x) sed -i "\:^${PWD}|.*:d" "$datafile";;
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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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# 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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# no file yet
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[ -f "$datafile" ] || return
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local cd
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cd="$(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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# relate frequency and 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, common) {
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# list or return the desired directory
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if( list ) {
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cmd = "sort -n >&2"
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for( i in files ) {
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if( files[i] ) printf "%-10s %s\n", files[i], i | cmd
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}
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if( common ) {
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printf "%-10s %s\n", "common:", common > "/dev/stderr"
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}
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} else {
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if( common ) toopen = common
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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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# find the common root of a list of dirs, if it exists
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for( i in matches ) {
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if( matches[i] && (!short || length(i) < length(short)) ) {
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short = i
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}
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}
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if( short == "/" ) return
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# use a copy to escape special characters, as we want to return
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# 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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alias ${_Z_CMD:-z}='_z 2>&1'
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[ "$_Z_NO_RESOLVE_SYMLINKS" ] || _Z_RESOLVE_SYMLINKS="-P"
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if compctl &> /dev/null; then
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# zsh
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[ "$_Z_NO_PROMPT_COMMAND" ] || {
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# populate directory list, avoid clobbering any other precmds
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if [ "$_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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_z_zsh_tab_completion() {
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# tab completion
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local compl
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read -l compl
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reply=(${(f)"$(_z --complete "$compl")"})
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}
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compctl -U -K _z_zsh_tab_completion _z
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elif complete &> /dev/null; then
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# bash
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# tab completion
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complete -o filenames -C '_z --complete "$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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grep -q "_z --add" <<< "$PROMPT_COMMAND" || {
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PROMPT_COMMAND="$PROMPT_COMMAND"$'\n''_z --add "$(pwd '$_Z_RESOLVE_SYMLINKS' 2>/dev/null)" 2>/dev/null;'
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}
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}
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fi
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