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#!/bin/bash
# pure shell version of 'new j'
# has frecency, rank, and recent
# has common and case preference
# lists to stderr
# protect multiple PROMPT_COMMAND appends
j() {
local datafile=$HOME/.j
if [ "$1" = "--add" ]; then
# add
shift
# $HOME isn't worth matching
[ "$*" = "$HOME" ] && return
awk -v q="$*" -v t="$(date +%s)" -F"|" '
BEGIN { l[q] = 1; d[q] = t }
$2 >= 1 {
if( $1 == q ) {
l[$1] = $2 + 1
d[$1] = t
} else {
l[$1] = $2
d[$1] = $3
}
count += $2
}
END {
if( count > 1000 ) {
for( i in l ) print i "|" 0.9*l[i] "|" d[i] # aging
} else for( i in l ) print i "|" l[i] "|" d[i]
}
' $datafile 2>/dev/null > $datafile.tmp
mv -f $datafile.tmp $datafile
elif [ "$1" = "--complete" ]; then
# tab completion
awk -v q="$2" -F"|" '
BEGIN { split(substr(q,3),a," ") }
{
if( system("test -d \"" $1 "\"") ) next
for( i in a ) $1 !~ a[i] && $1 = ""; if( $1 ) print $1
}
' $datafile 2>/dev/null
else
# list/go
while [ "$1" ]; do case $1 in
-h) echo "j [-h][-l][-r][-t] args" >/dev/stderr; return;;
-l) local list=1;;
-r) local typ="rank";;
-t) local typ="recent";;
--) while [ "$1" ]; do shift; local q="$q $1";done;;
*) local q="$q $1";;
esac; local n=$1; shift; done
[ "$q" ] || local list=1
# if we hit enter on a completion just go there
[ -d "$n" ] && {
cd "$n"
return
}
cd="$(awk -v t="$(date +%s)" -v list="$list" -v typ="$typ" -v q="$q" -F"|" '
function frecent(rank, time) {
dx = t-time
if( dx < 3600 ) return rank*4
if( dx < 86400 ) return rank*2
if( dx < 604800 ) return rank/2
return rank/4
}
function output(r, s, c) {
if( list ) {
if( typ == "recent" ) {
cmd = "sort -nr >/dev/stderr"
} else cmd = "sort -n >/dev/stderr"
for( i in r ) if( r[i] ) printf "%-15s %s\n", r[i], i | cmd
if( c ) printf "%-15s %s\n", "common:", c > "/dev/stderr"
} else {
if( c ) s = c
print s
}
}
function common(r, a, nc) {
for( i in r ) {
if( ! r[i] ) continue
if( !shortest || length(i) < length(shortest) ) shortest = i
}
if( shortest == "/" ) return
for( i in r ) {
if( ! r[i] ) continue
if( i !~ shortest ) x = 1
}
if( x ) return
if( nc ) {
for( i in a ) if( tolower(shortest) !~ tolower(a[i]) ) x = 1
} else for( i in a ) if( shortest !~ a[i] ) x = 1
if( !x ) return shortest
}
BEGIN { split(q, a, " ") }
{
if( system("test -d \"" $1 "\"") ) next
if( typ == "rank" ) {
f = $2
} else if( typ == "recent" ) {
f = t-$3
} else f = frecent($2, $3)
case[$1] = nocase[$1] = f
for( i in a ) if( $1 !~ a[i] ) delete case[$1]
for( i in a ) if( tolower($1) !~ tolower(a[i]) ) delete nocase[$1]
if( case[$1] > oldf ) {
cx = $1
oldf = case[$1]
} else if( nocase[$1] > noldf ) {
ncx = $1
noldf = nocase[$1]
}
print $0 >> FILENAME ".tmp"
}
END {
if( cx ) {
output(case, cx, common(case, a, 0))
} else if( ncx ) {
output(nocase, ncx, common(nocase, a, 1))
}
}
' $datafile)"
mv -f $datafile.tmp $datafile
[ "$cd" ] && cd "$cd"
fi
}
# tab completion
complete -C 'j --complete "$COMP_LINE"' j
# populate directory list. avoid clobbering other PROMPT_COMMANDs.
echo $PROMPT_COMMAND | grep -q "j --add" || {
PROMPT_COMMAND='j --add "$(pwd -P)";'"$PROMPT_COMMAND"
}
|
