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# maintains a jump-list of directories you actually use
# old directories eventually fall off the list
# inspired by http://wiki.github.com/joelthelion/autojump
# and something similar i had - but i could never get the dir list right.
#
# INSTALL:
# source into .bashrc under your '[-z "$PS1" ] || return' line
# cd around for a while
#
# USE:
# j [--l] [regex1 ... regexn]
# regex1 ... regexn jump to the most used directory matching all masks
# --l show the list instead of jumping
# with no args, returns full list
j() {
# change jfile if you already have a .j file for something else
jfile=$HOME/.j
if [ "$1" = "--add" ]; then
shift
# we're in $HOME all the time, let something else get all the good letters
[ "$*" = "$HOME" ] && return
awk -v q="$*" -v mx=1000 -F"|" '
$2 >= 1 {
if( $1 == q ) { l[$1] = $2 + 1; x = 1 } else l[$1] = $2
y += $2
}
END {
x || l[q] = 1
if( y > mx ) {
for( i in l ) print i "|" l[i]*(0.9*mx/y) # aging
} else for( i in l ) print i "|" l[i]
}
' $jfile 2>/dev/null > $jfile.tmp
mv -f $jfile.tmp $jfile
elif [ "$1" = "" -o "$1" = "--l" ];then
shift
awk -v q="$*" -F"|" '
BEGIN { split(q,a," ") }
{ for( o in a ) $1 !~ a[o] && $1 = ""; if( $1 ) print $2 "\t" $1 }
' $jfile 2>/dev/null | sort -n
# for completion
elif [ "$1" = "--complete" ];then
awk -v q="$3" -F"|" '
BEGIN { split(q,a," ") }
{ for( o in a ) $1 !~ a[o] && $1 = ""; if( $1 ) print $1 }
' $jfile 2>/dev/null
# if we hit enter on a completion just go there
elif [ "${1:0:1}" = "/" -a -d "$*" ]; then
cd "$*"
else
# prefer case sensitive
cd=$(awk -v q="$*" -F"|" '
BEGIN { split(q,a," ") }
{ for( o in a ) $1 !~ a[o] && $1 = ""; if( $1 ) { print $2 "\t" $1; x = 1 } }
END {
if( x ) exit
close(FILENAME)
while( getline < FILENAME ) {
for( o in a ) tolower($1) !~ tolower(a[o]) && $1 = ""
if( $1 ) print $2 "\t" $1
}
}
' $jfile 2>/dev/null | sort -nr | head -n 1 | cut -f 2)
[ "$cd" ] && cd "$cd"
fi
}
# prepend to PROMPT_COMMAND
PROMPT_COMMAND='j --add "$(pwd -P)";'"$PROMPT_COMMAND"
# bash completions for j
complete -o dirnames -o filenames -C "j --complete" j
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