git: display ins and outs

gistfile1.sh

function __get_git_branch {
    local br=""
    local git="$(git symbolic-ref HEAD 2> /dev/null)"

    # git
    if [ -n "$git" ]; then
        br="${git##refs/heads/}"
    fi  

    echo "$br"
}

function __vcs_branch_ps1 {
    local in=""
    local out=""
    local br="$(__get_git_branch)"
    
    if [ -n "$br" ]; then
        local upstream="$(git config branch.$br.remote)"
        local upstream_branch_full="$(git config branch.$br.merge)"
        local upstream_branch="${upstream_branch_full##refs/heads/}"

        # Add +/- count for commits.
        in=$(git log --oneline ..$upstream/$upstream_branch | wc -l | awk '{ print $1 }')
        out=$(git log --oneline $upstream/$upstream_branch.. | wc -l | awk '{ print $1 }')

        if [ $in -gt 0 ]; then
            in=" -$in"
        else
            in=""
        fi  

        if [ $out -gt 0 ]; then
            out=" +$out"
        else
            out=""
        fi  

        printf "(\e[0;33m%s\e[0;30m\e[0;31m%s\e[0;30m\e[0;32m%s\e[0;30m)" "${br}" "${in}" "${out}"
    fi  
}

#\h - host; \W - current dir name; \w - current dir path; \u - current user login
export PS1='\h:\033[38;5;21m\w\e[0m$(__vcs_branch_ps1)\$ '