Git info in my bash prompt

bash_prompt

# variables for git info in prompt
bGIT_PROMPT_OPEN=''
bGIT_PROMPT_MIDDLE=''
bGIT_PROMPT_CLOSE=''
bGIT_CURRENT_BRANCH=''
bGIT_CURRENT_SHA1=''
bGIT_CURRENT_STATUS=''

set_ps1_vars() {
    local gitdir=`git rev-parse --git-dir 2> /dev/null`
    if [ -z $gitdir ]; then
        bGIT_PROMPT_OPEN=''
        bGIT_PROMPT_MIDDLE=''
        bGIT_PROMPT_CLOSE=''
        bGIT_CURRENT_BRANCH=''
        bGIT_CURRENT_SHA1=''
        bGIT_CURRENT_STATUS=''
        return 0
    else
        bGIT_PROMPT_OPEN='['
        bGIT_PROMPT_MIDDLE='|'
        bGIT_PROMPT_CLOSE=']'
        bGIT_CURRENT_BRANCH=`git symbolic-ref HEAD 2> /dev/null | cut -d '/' -f 3`
        bGIT_CURRENT_SHA1=`git rev-parse --short HEAD 2> /dev/null`
        gitstatus=`git status --porcelain 2> /dev/null`
        if [ -z "$gitstatus" ]; then
            bGIT_CURRENT_STATUS=''
        else
            bGIT_CURRENT_STATUS='*'
        fi
        return 0
    fi
}


# colors for prompt
NORMAL="\[\e[0m\]"
PROMPT_C="\[\e[38;5;074m\]"
DIR_C="\[\e[38;5;237m\]"
BRANCH_C="\[\e[38;5;023m\]"
SHA1_C="\[\e[38;5;022m\]"
GIT_STATUS_C="\[\e[38;5;009m\]"

export PROMPT_COMMAND=set_ps1_vars # to avoid running rev-parse a bunch of times

# fancy prompt, showing git info if in a git repo
PS1="\n${PROMPT_C}(\t)${NORMAL} ${DIR_C}\w${NORMAL}"
# now add git info
PS1="${PS1} ${DIR_C}\$bGIT_PROMPT_OPEN${NORMAL}${BRANCH_C}\$bGIT_CURRENT_BRANCH${NORMAL}${DIR_C}\$bGIT_PROMPT_MIDDLE${NORMAL}${SHA1_C}\$bGIT_CURRENT_SHA1${NORMAL}${DIR_C}\$bGIT_PROMPT_CLOSE${NORMAL}${GIT_STATUS_C}\$bGIT_CURRENT_STATUS${NORMAL}"

# now add newline with prompt itself
PS1="${PS1}\n${PROMPT_C}\$${NORMAL} "