##################################################################### CONFIG
	default_user=lvv 		# default user is not displayed
	default_host="ahp"      # default host is not displayed
	default_domain="lvvnet"	# default domain is not deplayed, remote host is alwais shown

    # dir, rc, root color 
	if [ "`tput colors`" -ge 8 ];  then				#  if terminal supports colors
		dir_color='CYAN'
		rc_color='red'
		root_id_color='magenta'
	else											#  only B/W
		dir_color='bw_bold'
		rc_color='bw_bold'
	fi

                                                    # where is user color?

    # per host color
    TOSHA_host_color=yellow
    TASHA_host_color=cyan
       AL_host_color=green
       SH_host_color=blue
      LVV_host_color=blue
      AHP_host_color=white

    # vcs state colors
         init_vcs_color=WHITE     # initial
        clean_vcs_color=blue      # nothing to commit (working directory clean)
     modified_vcs_color=red       # Changed but not updated:
        added_vcs_color=green     # Changes to be committed:
        mixed_vcs_color=yellow    # 
    untracked_vcs_color=BLUE      # Untracked files:
           op_vcs_color=MAGENTA
     detached_vcs_color=RED


#####################################################################  post config

	######################################## terminfo colors
	#
	#   black?    0	8			  
	#	red       1 9
	#	green     2 10
	#	yellow    3 11
	#	blue      4 12
	#	magenta   5 13
	#	cyan      6 14
	#	white     7 15
	#
	#	terminfo setaf/setab - sets ansi foreground/background
	#	terminfo sgr0 - resets all atributes
	#	terminfo colors - number of colors

	### if term support colors,  then use color prompt, else bold

              black='\['`tput sgr0; tput setaf 0`'\]'
                red='\['`tput sgr0; tput setaf 1`'\]'
              green='\['`tput sgr0; tput setaf 2`'\]'
             yellow='\['`tput sgr0; tput setaf 3`'\]'
               blue='\['`tput sgr0; tput setaf 4`'\]'
            magenta='\['`tput sgr0; tput setaf 5`'\]'
               cyan='\['`tput sgr0; tput setaf 6`'\]'
              white='\['`tput sgr0; tput setaf 7`'\]'

              BLACK='\['`tput setaf 0; tput bold`'\]'
                RED='\['`tput setaf 1; tput bold`'\]'
              GREEN='\['`tput setaf 2; tput bold`'\]'
             YELLOW='\['`tput setaf 3; tput bold`'\]'
               BLUE='\['`tput setaf 4; tput bold`'\]'
            MAGENTA='\['`tput setaf 5; tput bold`'\]'
               CYAN='\['`tput setaf 6; tput bold`'\]'  # why 14 dosn't work?
              WHITE='\['`tput setaf 7; tput bold`'\]'

            bw_bold='\['`tput bold`'\]'
               bell=`tput bel`

       colors_reset='\['`tput sgr0`'\]'

	# Workaround for UTF readline(?) bug. Dissable bell when UTF
	locale |grep -qi UTF && bell=''	


    # replace symbolic colors names to raw treminfo strings
         init_vcs_color=${!init_vcs_color}
     modified_vcs_color=${!modified_vcs_color}
    untracked_vcs_color=${!untracked_vcs_color}
        clean_vcs_color=${!clean_vcs_color}
        added_vcs_color=${!added_vcs_color}
           op_vcs_color=${!op_vcs_color}
        mixed_vcs_color=${!mixed_vcs_color}
     detached_vcs_color=${!detached_vcs_color}

##################################################################### 
	# if label non empty, append 1 space
	label=${1:+$1 }


	# echo "*** /etc/prompt  on A,  TERM=$TERM"
	unset PROMPT_COMMAND

	#######  work aroud for MC bug
	if [ -z "$TERM" -o "$TERM" = "dumb" -o -n "$MC_SID" ]; then
		unset PROMPT_COMMAND
		PS1='\w> '
		return 0
	fi

	export who_where


set_shell_title() { 

	xterm_title() { echo  -n "]2;${@}" ; }

	screen_title() { 
		# FIXME: run this only if screen is in xterm (how to test for this?)
		xterm_title  "sCRn  $label$plain_who_where $@" 

		# FIXME $STY not enherited though "su -"
		[ "$STY" ] && screen -S $STY -X title "$@"
	}

	case $TERM in

		screen*)                                                    
			screen_title "$@"
			;;

		xterm* | rxvt* | gnome-terminal | konsole | eterm | wterm )       
			# is there a capability which we can to test 
			# for "set term title-bat" and its escapes?
			#echo -n "]2;$label$plain_who_where $1"
			xterm_title  "$label$plain_who_where $@"
			;;

		*)                                                     
			;;
	esac
 }

    export -f set_shell_title

###################################################### ID (user name)
	id=`id -un`
	id=${id#$default_user}

########################################################### TTY
	tty=`tty`
	tty=`echo $tty | sed "s:/dev/pts/:p:; s:/dev/tty::" `		# RH tty devs	
	tty=`echo $tty | sed "s:/dev/vc/:vc:" `				# gentoo tty devs

	if [[ "$TERM" = "screen" ]] ;  then

		#	[ "$WINDOW" = "" ] && WINDOW="?"
		#	
		#		# if under screen then make tty name look like s1-p2
		#		# tty="${WINDOW:+s}$WINDOW${WINDOW:+-}$tty"
		#	tty="${WINDOW:+s}$WINDOW"  # replace tty name with screen number
		tty="$WINDOW"  # replace tty name with screen number
	fi

	# we don't need tty name under X11
	case $TERM in
		xterm* | rxvt* | gnome-terminal | konsole | eterm | wterm )  unset tty ;;
		*)		                                                              ;;
	esac


    dir_color=${!dir_color}
    rc_color=${!rc_color}
    root_id_color=${!root_id_color}


	########################################################### HOST
	### we don't display home host/domain  $SSH_* set by SSHD or keychain

    # I give up.  How to find out if session is local or remote? Working with "su -", ssh-agent, and so on ? 
	## is sshd our perent?
	# if 	{ for ((pid=$$; $pid != 1 ; pid=`ps h -o pid --ppid $pid`)); do ps h -o command -p $pid; done | grep -q sshd }
	#then 
		host=${HOSTNAME}
		#host=`hostname --short`
		host=`echo ${host%$default_host} | tr a-z A-Z`
		#host=`echo ${host} | tr a-z A-Z`
        host_color=${host}_host_color
        host_color=${!host_color}
	#else
	#	host=""
	#fi 

    host_color=${!host_color}

	# we already should have short host name, but just in case
	host=${host%.localdoman}
	host=${host%.$default_domain}


#################################################################### WHO_WHERE 
    # who_ware. Is constant.  Looks like
    # 	[user@]host[-tty]

    color_who_where="${id:+$id@}$host_color$host${tty:+ $tty}"
    plain_who_where="${id:+$id@}$host"

    # remove trailing "@" if any
    color_who_where="${color_who_where%@}"
    plain_who_where="${plain_who_where%@}"

    # add traling " "
    color_who_where="$color_who_where "
    plain_who_where="$plain_who_where "

    # if  $who_where==" "  then  who_where=""
    color_who_where="${color_who_where## }"
    plain_who_where="${plain_who_where## }"


    # if root then highlight who_where
    if	[ "$id" == "root" ]  ; then 
        color_who_where="$root_id_color$color_who_where$colors_reset"
    fi


parse_svn_dir() {

        if [[ ! -d .svn ]];   then
            return 1
        fi 

        vcs=svn

        ### get rev
        eval `
            svn info |
                sed -n "                                                                                                                          
                    s@^URL[^/]*//@repo_dir=@p
                    s/^Revision: /rev=/p
                "
        `
        ### get status

        unset status modified added clean init added mixed untracked op detached
        eval `svn -q status 2>/dev/null |
                sed -n "
                    s/^A      /modified=modified; modified_files+=\" \"/p
                    s/^M      /modified=modified; modified_files+=\" \"/p
                " 
        `
        # TODO untracked files; untracked state; branch detection if standart repo layout

        [[  -z $modified ]]  && [[ -z $untracked ]] && clean=clean
        vcs_info=svn:r$rev
 }
        
   
parse_git_dir() {

        git_dir=`git-rev-parse --git-dir 2> /dev/null`

        [[ $git_dir ]]  ||  return  1

        vcs=git

        ##########################################################   GIT STATUS
        unset status modified added clean init added mixed untracked op detached
        eval `
                git status 2>/dev/null |
                    sed -n "
                        s/^# On branch /branch=/p
                        s/^nothing to commit (working directory clean)/clean=clean/p
                        s/^# Initial commit/init=init/p
                        /^# Untracked files:/,/^[^#]/{
                            s/^# Untracked files:/untracked=untracked/p
                            s/^#	/untracked_files+=\" \"/p   
                        }
                        /^# Changed but not updated:/,/^# [A-Z]/ {
                            s/^# Changed but not updated:/modified=modified/p
                            s/^#	modified:   /modified_files+=\" \"/p
                            s/^#	unmerged:   /modified_files+=\" \"/p
                        }
                        /^# Changes to be committed:/,/^# [A-Z]/ {
                            s/^# Changes to be committed:/added=added/p
                            s/^#	modified:   /added_files+=\" \"/p
                            s/^#	new file: */added_files+=\" \"/p
                            s/^#	renamed:[^>]*> /added_files+=\" \"/p
                            s/^#	copied:[^>]*> /added_files+=\" \"/p
                        }
                    " 
        `

        if  ! grep -q "^ref:" $git_dir/HEAD  2>/dev/null;   then 
            detached=detached
        fi

        ### OP 
        unset op
        
        if [[ -d "$git_dir/.dotest" ]] ;  then

            if [[ -f "$git_dir/.dotest/rebasing" ]] ;  then
                op="rebase"

            elif [[ -f "$git_dir/.dotest/applying" ]] ; then
                op="am"

            else
                op="am/rebase"

            fi

        elif  [[ -f "$git_dir/.dotest-merge/interactive" ]] ;  then
            op="rebase -i"
            # ??? branch="$(cat "$git_dir/.dotest-merge/head-name")"

        elif  [[ -d "$git_dir/.dotest-merge" ]] ;  then
            op="rebase -m"
            # ??? branch="$(cat "$git_dir/.dotest-merge/head-name")"
            
        elif  [[ -f "$git_dir/MERGE_HEAD" ]] ;  then
            op="merge"
            # ??? branch="$(git symbolic-ref HEAD 2>/dev/null)"
            
        else
            [[  -f "$git_dir/BISECT_LOG"  ]]   &&  op="bisect"
            # ??? branch="$(git symbolic-ref HEAD 2>/dev/null)" || \
            #    branch="$(git describe --exact-match HEAD 2>/dev/null)" || \
            #    branch="$(cut -c1-7 "$git_dir/HEAD")..."
        fi

        #####################################################################

        rawhex=`git-rev-parse HEAD 2>/dev/null`
        rawhex=${rawhex/HEAD/}
        rawhex=${rawhex:0:6}
        
        ### branch

        branch=${branch/master/M}

                        # another method of above:
                        # branch=$(git-symbolic-ref -q HEAD || { echo -n "detached:" ; git-name-rev --name-only HEAD 2>/dev/null; } )
                        # branch=${branch#refs/heads/}

        ### compose vcs_info

        if [[ $init ]];  then 
            vcs_info=init:M


        else
            if [[ "$detached" ]] ;  then     
                branch="<detached:`git-name-rev --name-only HEAD 2>/dev/null`"


            elif   [[ "$op" ]];  then
                    branch="$op:$branch"
                    if [[ "$op" == "merge" ]] ;  then     
                        branch+="<~$(git-name-rev --name-only $(<$git_dir/MERGE_HEAD))"
                    fi
                    branch="<$branch>"
            fi
            vcs_info="$branch$white=$rawhex"

        fi
 }

parse_vcs_dir() {

        unset   file_list modified_files untracked_files added_files 
        unset   vcs vcs_info
        unset   status modified untracked added init detached
        unset   file_list modified_files untracked_files added_files 

        parse_git_dir ||  parse_svn_dir || return 

     
        ### status:  choose primary (for branch color)
        unset status
        status=${op:+op}
        status=${status:-$init}
        status=${status:-$detached}
        status=${status:-$clean}
        status=${status:-$modified}
        status=${status:-$added}
        status=${status:-$untracked}
                                # at least one should be set
                                : ${status?prompt internal error: git status}
        eval vcs_color="\${${status}_vcs_color}"
                                # no def:  vcs_color=${vcs_color:-$WHITE}    # default 

        ### file list
        unset file_list
        file_list+=${added_files:+$added_vcs_color$added_files}
        file_list+=${modified_files:+$modified_vcs_color$modified_files}
        file_list+=${untracked_files:+$untracked_vcs_color$untracked_files}
        file_list=${file_list:+:$file_list}

        tail_local="($vcs_info$vcs_color${file_list}$vcs_color)"

        ### fringes (added depended on location)
        head_local="${head_local+$vcs_color $head_local\n}"
        tail_local="${tail_local+$vcs_color $tail_local}${dir_color}"
 }


###################################################################### PROMPT_COMMAND

prompt_command_function() {
	rc="$?"

	if [[ "$rc" == "0" ]]; then 
		rc=""
	else
		#rc="$rc_color$rc$colors_reset$bell "
		rc="$rc_color$rc$colors_reset "
	fi

	set_shell_title "$PWD/" 

	# truncate $PWD to $max
		max=35
		front=7
		head=${PWD:0:$front}"..."

    parse_vcs_dir

    #########################
	# PS1="$label$rc'$color_who_where$dir_color'${head:10*(${#PWD}<max)}${PWD:(${#PWD}>max)*(${#PWD}-max):max}> '$colors_reset'"
    
	PS1="$head_local$colors_reset$label$rc$color_who_where$dir_color\w$tail_local$dir_color> $colors_reset"

    unset head_local tail_local
}
    

    PROMPT_COMMAND=prompt_command_function

    unset rc id tty bell

# vim: set syntax=sh: