bashDirB.symlink

# Directory Bookmarks for BASH (c) 2009, Ira Chayut, Version 090927
#
# To use, save this file as ~/.bashDirB and add the following line to ~/.bashrc:
#
#        source ~/.bashDirB
#
# DirB and its implementation in this file are the product of, and
# copyrighted by Ira Chayut.  You are granted a non-exclusive, royalty-free
# license to use, reproduce, modify and create derivative works from DirB; 
# providing that credit is given to DirB as a source material.
#
# The lastest version is available from: http://www.dirb.info/bashDirB.  Ira can
# be reached at ira@dirb.info.  
#
# By default DirB will have the shell echo the current working directory out
# to the title bars of Xterm windows.  To disable this behavior, comment
# out the next line.
#PS1="\[\033]0;\w\007\]\t \!> "

# If the repository of bookmarks does not exist, create it
if  [ ! -e ~/.DirB ]
then
    mkdir ~/.DirB
fi

# "s" - Save bookmark
function s () { 
    if [ -n "$2" ]
    then
        # build the bookmark file with the contents "$CD directory_path"
        ( echo '$CD ' \"$2\" > ~/.DirB/"$1" ;) > /dev/null 2>&1
    else
        # build the bookmark file with the contents "$CD directory_path"
        ( echo -n '$CD ' > ~/.DirB/"$1" ; 
          pwd | sed "s/ /\\\\ /g" >> ~/.DirB/"$1" ; ) > /dev/null 2>&1

    fi

    # if the bookmark could not be created, print an error message and
    # exit with a failing return code
    if [ $? != 0 ]
    then
        echo bash: DirB: ~/.DirB/"$1" could not be created >&2
        false
    fi
}

# "g" - Go to bookmark
function g () { 
    # if no arguments, then just go to the home directory
    if [ -z "$1" ]
    then
        cd
    else
        # if $1 is in ~/.DirB and does not begin with ".", then go to it
        if [ -f ~/.DirB/"$1" -a ${1:0:1} != "." ]
        then 
            # update the bookmark's timestamp and then execute it
            touch ~/.DirB/"$1" ; 
            CD=cd source ~/.DirB/"$1" ; 
        # else just do a "cd" to the argument, usually a directory path of "-"
        else
            cd "$1"
        fi
    fi
}

# "p" - Push a bookmark
function p () { 
    # Note, the author's preference is to list the directory stack in a single 
    # column.  Thus, the standard behavior of "pushd" and "popd" have been 
    # replaced by discarding the normal output of these commands and using a 
    # "dirs -p" after each one.

    # if no argument given, then just pushd and print out the directory stack
    if [ -z "$1" ]
    then
        pushd > /dev/null && dirs -p

    # if $1 is a dash, then just do a "popd" and print out the directory stack
    elif [ "$1" == "-" ]
    then
        popd > /dev/null
        dirs -p
    else
        # if $1 is in ~/.DirB and does not begin with ".", then go to it
        # and then print out the directory stack
        if [ -f ~/.DirB/"$1" -a "${1:0:1}" != "." ]
            then
                touch ~/.DirB/$1 ; 
                CD=pushd source ~/.DirB/$1 > /dev/null && dirs -p ; 

        # else just do a "pushd" and print out the directory stack
        else
            pushd "$1" > /dev/null && dirs -p
        fi
    fi
}

# "sl" - Saved bookmark Listing
function sl () { 
    # if the "-l" argument is given, then do a long listing, passing any 
    # remaining arguments to "ls", printing in reverse time order.  Pass the
    # output to "less" to page the output if longer than a screen in length.
    if [ "$1" == "-l" ]
    then
        shift
        ( cd ~/.DirB ;
        ls -lt $* | 
            sed -e 's/  */ /g' -e '/^total/d' \
                -e 's/^\(... \)\([0-9] \)/\1 \2/' | 
            cut -d ' ' -s -f6- | sed -e '/ [0-9] /s// &/' | less -FX ; )

    # else print the short form of the bookmarks in reverse time order
    else
        ( cd ~/.DirB ; ls -xt $* ; )
    fi
}

# "r" - Remove a saved bookmark
function r () { 
    # if the bookmark file exists, remove it
    if [ -e ~/.DirB/"$1" ]
    then
        rm ~/.DirB/"$1"

    # if the bookmark file does not exist, complain and exit with a failing code
    else
        echo bash: DirB: ~/.DirB/"$1" does not exist >&2
        false
    fi
}

# "d" - Display (or Dereference) a saved bookmark
# to use: cd "$(d xxx)"
function d () {  
    # if the bookmark exists, then extract its directory path and print it
    if [ -e ~/.DirB/"$1" ]
    then
        sed -e 's/\$CD //' -e 's/\\//g' ~/.DirB/"$1"

    # if the bookmark does not exists, complain and exit with a failing code
    else
        echo bash: DirB: ~/.DirB/"$1" does not exist >&2
        false
    fi
}