Git bash prompt

git_prompt.sh

function git_prompt {
    # get the current status in short notation
    local status=$(git status -sb 2> /dev/null)

    # if we don't get any output, we're not in a git repo
    if [ -z "$status" ]; then
        return
    fi

    # determine color for displaying the branch name
    # default=no changes; yellow=merge; red=untracked/modified; green=added
    local color="\e[39m"
    if [ ! -z "$(egrep '^UU' <<< "$status")" ];then
        color="\e[33m"
    elif [ ! -z "$(egrep '^[^#][^ ]' <<< "$status")" ]; then
        color="\e[31m"
    elif [ ! -z "$(egrep '^[MARCD]' <<< "$status")" ]; then
        color="\e[32m"
    fi

    # get name of the branch and ahead/behind info
    local status_line=$(head -1 <<< "$status")
    local branch=$(sed -e "s/^## \([^\.]*\).*/\1/" <<< "$status_line")

    local ahead=$(sed -e "/.*ahead \([0-9][0-9]*\).*$/!d;s//\1/" <<< "$status_line")
    if [ -z "$ahead" ]; then
        ahead="0"
    fi

    local behind=$(sed -e "/.*behind \(.*\)]/!d;s//\1/" <<< "$status_line")
    if [ -z "$behind" ]; then
        behind="0"
    fi

    # e.g. [develop 1↑5↓]
    echo -e " [$color$branch\e[0m $ahead\u2191$behind\u2193] "
}

export PS1='\u@\h:\w$(git_prompt)$ '

Cool stuff. On Mac I am using the following script. It does not include the ahead/behind state, but it should work for Mac in case Roberts script does not:

alias git='LANG=en_US git'
export PS1='\[$(tput setf 2)\]\u\[\033[0;31m\] \W \[$(tput setf 3)\]`GIT_BRANCH=$(git branch 2>/dev/null | cut -f2 -d* -s | sed "s/^\ //"); ([[ -n $GIT_BRANCH ]] && echo -n "\[\033[0;33m\][git:\[\033[1;33m\]$GIT_BRANCH]\[\033[0m\]")`\$'

Thanks for that. My script above was written on a Mac with macports and bash 4.3 installed. I think the \e directives are only working on bash 4.x.

Now deprecated. Use magicmonty/bash-git-prompt if you can.