#!/bin/sh

# check if there's .git dir in a parent dir
isgit() {
    _path="$PWD"
    while [ -n "$_path" ]
    do 
        if [ -d "$_path/.git" ]
        then
            return 0
        fi
        _path="${_path%/*}"
    done
    return 1
}

if ! isgit
then echo "no git repository"
     return
fi

_width=$(tput cols)
if [ -z "$_width" ]
then
    _width=60
fi
[ $_width -lt 43 ] \
    && _width=43 \
    || _width=$(( _width - 3 ))

_origin=$(git remote get-url origin \
                2> /dev/null)
[ -n "$_origin" ] \
    && echo "# origin: $_origin"

_upstream=$(git remote get-url upstream \
                2> /dev/null)

[ -n "$_upstream" ] \
    && echo "# upstream: $_upstream"

_base=$(git --no-pager log \
                --abbrev-commit \
                --pretty=format:'%h | %an: %s' \
                HEAD~2...origin/HEAD~1 \
                    2> /dev/null)

_branch=$(git --no-pager branch \
                --no-color \
                --show-current \
                    2> /dev/null)

[ -n "$_base" ] \
    && printf '%s\n' "# branch ($_branch) fork point: $_base" \
            | sed "s/\(.\{$_width\}\).*/\1.../"

_log=$(git --no-pager log \
                --reverse \
                --abbrev-commit \
                --date=format:'%d.%m.%y %H:%S' \
                --pretty=format:'%h|%ad|%an: %s' \
                ...origin/HEAD \
                    2>/dev/null)
if [ -n "$_log" ]
then 
    echo "# local commits"
    printf '%s\n' "$_log" | sed "s/\(.\{$_width\}\).*/\1.../"
else 
    echo "# no local commits"
fi

_stat=$(git --no-pager status \
            --short 2>/dev/null)

if [ -n "$_stat" ]
then 
    echo "# local changes:"
    echo "$_stat"
else 
    echo "# no local changes"
fi