Useful Bash prompt/tab settings for showing git info

git_shell_funcs.sh

#
# Added to .bash_profile on a mac, these utils will show the  
# current repo in the terminal tab name and will include the current git
# branch name on the shell prompt. 
#


function set_terminal_tabname {
    # function that sets Terminal Tab name to $1
    printf "\e]1;$1\a"
}

function repo_name
{
    # function to return the name of the current git repo
    # or empty string if not in a repo
    if git rev-parse --git-dir > /dev/null 2>&1; then
        REPO="$(git rev-parse --show-toplevel)"
        if [ ! -z "$REPO" ]; then
            echo `basename $REPO`
        fi
    fi
}

function set_terminal_tab_reponame
{
    # Set the terminal to the current repo name
    REPONAME=`repo_name`
    if [ -z "$REPO" ]; then
        set_terminal_tabname $REPONAME
        return
    fi
    return
}


function parse_git_branch ()
{
    ref=$(git symbolic-ref HEAD 2> /dev/null) || return;
    set_terminal_tab_reponame;
    BRANCH="("${ref#refs/heads/}")";
    echo "${BRANCH}"
}

export PS1="[\t \W] \$(parse_git_branch) "