cdfunc.sh

cdfunc.sh

# This function defines a 'cd' replacement function capable of keeping, 
# displaying and accessing history of visited directories, up to 10 entries.
# To use it, uncomment it, source this file and try 'cd --'.
# acd_func 1.0.5, 10-nov-2004
# Petar Marinov, http:/geocities.com/h2428, this is public domain
xcd_func ()
 {
   local x2 the_new_dir adir index
   local -i cnt
 
   if [[ $1 ==  "--" ]]; then
     dirs -v
     return 0
   fi
 
   the_new_dir=$1
   [[ -z $1 ]] && the_new_dir=$HOME
 
   if [[ ${the_new_dir:0:1} == '-' ]]; then
     #
     # Extract dir N from dirs
     index=${the_new_dir:1}
     [[ -z $index ]] && index=1
     adir=$(dirs +$index)
     [[ -z $adir ]] && return 1
     the_new_dir=$adir
   fi
 
   #
   # '~' has to be substituted by ${HOME}
   [[ ${the_new_dir:0:1} == '~' ]] && the_new_dir="${HOME}${the_new_dir:1}"
 


   #
   # Now change to the new dir and add to the top of the stack
   pushd "${the_new_dir}" > /dev/null
   [[ $? -ne 0 ]] && return 1
   the_new_dir=$(pwd)
 
   #
   # Trim down everything beyond 11th entry
   popd -n +11 2>/dev/null 1>/dev/null
   #
   # Remove any other occurence of this dir, skipping the top of the stack
   for ((cnt=1; cnt <= 10; cnt++)); do
     x2=$(dirs +${cnt} 2>/dev/null)
     [[ $? -ne 0 ]] && return 0
     [[ ${x2:0:1} == '~' ]] && x2="${HOME}${x2:1}"
     if [[ "${x2}" == "${the_new_dir}" ]]; then
       popd -n +$cnt 2>/dev/null 1>/dev/null
       cnt=cnt-1
     fi
   done
   return 0
 }

 # wrapper for .env.sh functionality -- Al Williams
 # Note: it would be nice check for a successful cd so you don't
 # leave and then enter but with CDPATH and shopt cdable_vars/cdspell, it is tricky to know cd 
 # will work before it does
 # also shopt autocd is not compatible with this

 # Note, you could catch any other way to get to the directory (e.g. popd, etc)
 # by running this as part of the project and testing for PWD!=LASTPWD
 # if so, run any exit you find in OLDPWD or ../OLDPWD and then run any
 # entry you find in $PWD and set LASTPWD to PWD
 # see cd_prompt below (lightly tested)
cd_func()
{
    # this is relatively wasteful to see if it is going to work
    ( builtin cd "$@" >/dev/null 2>&1 )
    badcd=$?
    dir="$1"
    # see if we are really changing
    if [ -z "$1" ] ; then   # special case: no argument
	dir=~
    fi
    if [[ "$1" == "-" ]] ; then  # special case: cd -
       dir="$OLDPWD"
    fi
    if [[ "$1" ==  "--" ]]; then  # special case: cd -- (list dirs)
	xcd_func --
	return $?
    fi
    if [ $badcd == 0 ]  # if we have a real place to go, find its inode
    then
	   pwdid=`ls -id .| cut -d ' ' -f 1`
	   newid=`ls -id "$dir" 2>/dev/null |cut -d ' ' -f 1`
    fi
# if no place to go or we are going to the same place, just execute it and be done
   if [[ $badcd == 1 || $pwdid == $newid ]]; then xcd_func "$@" ; return $? ; fi
# if .env.sh in current directory or .., call it
   if [ -f .env.sh ]
   then source .env.sh leave dir "$PWD" 
   elif [ -f ../.env.sh ]
   then source ../.env.sh leave child "$PWD" 
   fi
# switch
   xcd_func "$@"
   rv=$?
# if .env.sh in new directory or .., call it
   if [ -f .env.sh ]
   then source .env.sh enter dir "$PWD" 
   elif [ -f ../.env.sh ]
   then source ../.env.sh enter child "$PWD" 
   fi
   return $rv
}

# Set this to run using PROMPT_COMMAND
# it assumes $PWD will be set correctly.
# This handles things like changing directories using non-cd sources.
#
# Note: You do NOT need to use both functions
# if you alias cd=cd_func, you are done
# if you set PROMPT_COMMAND to cd_prompt, you are also done
# If you do both you will get scripts running twice
cd_prompt()
{
    if [ -z "$LASTPWD" -o  "$PWD" != "$LASTPWD" ]
    then
	if [ -f "$OLDPWD/.env.sh" ]
	then source "$OLDPWD/.env.sh" leave dir "$OLDPWD" 
	elif [ -f "$OLDPWD/../.env.sh" ]
	then source "$OLDPWD/../.env.sh" leave child "$PWD" 
	fi
	if [ -f .env.sh ]
	then source .env.sh enter dir "$PWD" 
	elif [ -f ../.env.sh ]
	then source ../.env.sh enter child "$PWD" 
	fi
	LASTPWD="$PWD"
    fi
}

# setup 
 alias cd=cd_func

#or
# PROMPT_COMMAND=cd_prompt