add j.sh

1 files changed, 70 insertions, 0 deletions

diff --git a/bash/j.sh b/bash/j.sh
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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