Version control aware ps1

gistfile1.sh

. /etc/bash_completion.d/git
function customW {
    echo $PWD | sed 's|.*/\([a-Z0-9][a-Z0-9]*/[a-Z0-9][a-Z0-9]*\)|\1|'
}
function hasToPush {
    git diff-index --quiet --cached HEAD &>/dev/null &&
        (git svn dcommit --dry-run 2>/dev/null | grep -q "diff-tree" && echo "↑")
}
function hasToPull {
    git diff-index --quiet --cached HEAD &>/dev/null && (
	latest=$(git svn log | awk 'NR==2' | cut -d ' ' -f1 | tr -d 'r')
	current=$1
	(($latest > $current)) && echo "↓"
    )
}
function discoverScmInfo {
    gitPs1=$(__git_ps1)
    if [ "x$gitPs1" != "x" ]; then
        gitsvn=$(git svn info 2> /dev/null | grep Revision)
	gitsvn=${gitsvn#Revision: }
	if [ "x$gitsvn" != "x" ]; then
            echo "${gitPs1}($gitsvn$(hasToPull $gitsvn)$(hasToPush))"
        else
            echo "$gitPs1"  
        fi
    fi
}
PS1='$(customW)$(discoverScmInfo)\$ '