PS1 with git

ps1.sh

#!/usr/bin/env bash
# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color|*-256color) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
	# We have color support; assume it's compliant with Ecma-48
	# (ISO/IEC-6429). (Lack of such support is extremely rare, and such
	# a case would tend to support setf rather than setaf.)
	color_prompt=yes
    else
	color_prompt=
    fi
fi

# Add git status to the PS1
ps1_git_status() {
    branch=$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')
    if [[ ! $branch ]]; then
      exit 0;
    fi

    # Choose branch name color
    if [[ $branch == "master" ]]; then
        psgit=' (\e[1;30m';
    elif [[ $branch =~ "develop" ]]; then
        psgit=" (\e[1;33m";
    elif [[ $branch =~ "feat" ]]; then
        psgit=" (\e[1;35m";
    elif [[ $branch =~ "fix" ]]; then
        psgit=" (\e[1;31m";
    elif [[ ! -z $branch ]]; then
        psgit=" (\e[0;33m";
    fi
    psgit+="$branch"

    changes=$(git status --short --branch | wc -l)
    if [[ "$changes" > 1 ]]; then
      psgit+='*'
    fi
    psgit+='\033[00m)'

    status=$(git status --short --branch | head -n 1)

    ahead=$(echo $status | sed -n 's/^.*ahead \+\([0-9]\+\).*$/\1/p')
    if [[ ! $ahead ]] ; then
      ahead=0
    fi

    behind=$(echo $status | sed -n 's/^.*behind \+\([0-9]\+\).*$/\1/p')
    if [[ ! $behind ]] ; then
      behind=0
    fi

    if [[ "$ahead" > 0 || "$behind" > 0 ]] ; then
      psgit+="[\e[0;32m$ahead\033[00m,\e[0;31m$behind\033[00m]"
    fi
    echo -e "$psgit"
}

if [ "$color_prompt" = yes ]; then
    PS1='\[\033[1;32m\]\u@\h\[\033[00m\] \[\033[1;34m\]\w\[\033[00m\]$(ps1_git_status)\$ '
else
    PS1='\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac