_bold=$(tput bold)
_normal=$(tput sgr0)


__vcs_dir() {
	local vcs base_dir sub_dir ref
	sub_dir() {
	  local sub_dir
	  sub_dir=$(stat -f "${PWD}")
	  sub_dir=${sub_dir#$1}
	  echo ${sub_dir#/}
	}

	git_dir() {
	 base_dir=$(git-rev-parse --show-cdup 2>/dev/null) || return 1
	 if [ -n "$base_dir" ]; then
	  base_dir=`cd $base_dir; pwd`
	 else
      base_dir=$PWD
     fi
     sub_dir=$(git-rev-parse --show-prefix)
	 sub_dir="/${sub_dir%/}"
	 ref=$(git-symbolic-ref -q HEAD || git-name-rev --name-only HEAD 2>/dev/null)
	 ref=${ref#refs/heads/}
	 git_svn_url=$(git-config svn-remote.svn.url 2>/dev/null)
	 if [ -n "$git_svn_url" ]; then
       vcs="git-svn"
       alias pull="git-svn fetch"
       alias commit="git commit -a"
       alias push="commit && git-svn dcommit"
       alias revert="git checkout"
	 else
       vcs="git"
       alias pull="git pull"
       alias commit="git commit -a"
       alias push="commit && git push"
       alias revert="git checkout"
     fi
	 base_dir="$(basename "${base_dir}")"
	}

	svn_dir() {
	 [ -d ".svn" ] || return 1
	 base_dir="."
	 while [ -d "$base_dir/../.svn" ]; do base_dir="$base_dir/.."; done
	 base_dir=`cd $base_dir; pwd`
	 sub_dir="/$(sub_dir "${base_dir}")"
	 ref=$(svn info "$base_dir" | awk '/^URL/ { sub(".*/","",$0); r=$0 } /^Revision/ { sub("[^0-9]*","",$0); print r":"$0 }')
	 vcs="svn"
	 base_dir="$(basename "${base_dir}")"
	 alias pull="svn up"
	 alias commit="svn commit"
	 alias push="svn ci"
	 alias revert="svn revert"
	}

	cvs_dir() {
	 [ -d "CVS" ] || return 1
	 base_dir="."
	 while [ -d "$base_dir/../CVS" ]; do base_dir="$base_dir/.."; done
	 base_dir=`cd $base_dir; pwd`
	 sub_dir="/$(sub_dir "${base_dir}")"
	 if [ -e "CVS/Tag" ]; then
      ref="$(cut -c 2- CVS/Tag)"
	 else
      ref="trunk"
     fi
	 vcs="cvs"
	 base_dir="$(basename "${base_dir}")"
	 alias pull="cvs update"
	 alias commit="cvs commit"
	 alias push="cvs commit"
	 alias revert=""
	}

	accurev_dir() {
	 base_dir=$(accurev info 2> /dev/null | grep ^Depot:) || return 1
	 base_dir=$(accurev info 2> /dev/null | grep ^Depot: | cut -f 3-)
	 ref=$(accurev info 2> /dev/null | grep ^Workspace/ref: | cut -f 2-)
	 top=$(accurev info 2> /dev/null | grep ^Top: | cut -f 3-)
	 sub_dir="/$(sub_dir "${top}")"
	 vcs="accurev"
	 alias pull="accurev update"
	 alias commit="accurev promote"
	 alias push="accurev promote"
	 alias revert=""
	}

	cvs_dir || svn_dir || accurev_dir || git_dir

	if [ -n "$vcs" ]; then
	 __vcs_prefix="($vcs)"
	 __vcs_base_dir="${base_dir/$HOME/~}"
	 __vcs_ref="[$ref]"
	 __vcs_sub_dir="${sub_dir}"
 	 alias st="$vcs status"
	 alias d="$vcs diff"
         alias up="pull"
	else
	 unalias st 2> /dev/null
	 unalias d 2> /dev/null
	 unalias up 2> /dev/null
	 unalias pull 2> /dev/null
	 unalias commit 2> /dev/null
	 unalias push 2> /dev/null
	 unalias revert 2> /dev/null

	 __vcs_prefix=''
	 __vcs_base_dir_temp=`basename "$PWD"`
	 if [ "$PWD" == "$HOME" ]; then
		__vcs_base_dir="~"
     else
	   __vcs_base_dir="`basename "$PWD"`"
	 fi
	 __vcs_ref=''
	 __vcs_sub_dir=''
	fi
}

PROMPT_COMMAND=__vcs_dir
PS1='\[\033]0;\u@\h:\w\007\]\u:$__vcs_prefix\[${_bold}\]${__vcs_base_dir}\[${_normal}\]${__vcs_ref}\[${_bold}\]${__vcs_sub_dir}\[${_normal}\]\$ '