.bashrc snippet for displaying current branch when in repositories

.bashrc.git

# Add some magic when in git repos
GIT_SUFFIX=$(echo $PS1 | grep "__git_ps1")
if [ -z "$GIT_SUFFIX" ]; then
	SRC=/usr/share/git-core/contrib/completion/git-prompt.sh
	if [ -f $SRC ]; then
		. $SRC
	fi
	PS1="$(echo $PS1 | sed s/']\\\$'//)\$(__git_ps1)]$ "
fi

function git-branch-prune() {
    local current_branch=$(git rev-parse --abbrev-ref HEAD)
    git fetch -p

    for r in $(git remote); do
        git remote prune ${r}
    done;

    git branch -vv | grep ': gone]' | awk '{print $1}' \
        | grep -v "${current_branch}" \
        | xargs -I {} git branch -D {}

    git branch -vv | cut -c 3- | awk '$3 !~/\[/ { print $1 }' \
        | grep -v "${current_branch}" \
        | xargs -I {} git branch -D {}
}