#!/bin/sh
# ----------------------------------------------------------------------
# Clone a git repository in get stage or check if it's the right one
# in case already cloned.
#
# Authors:  Alexander Dahl <post@lespocky.de>
#
# Copyright 2011,2012,2013 Alexander Dahl
# ----------------------------------------------------------------------
#set -x
#set -e

_RED="\033[31m"
_YELLOW="\033[33m\033[40m\033[1m"
_NOCOLOR="\033[0m\033[49m"

GITURL="$1"
DESTDIR="$2"

print_usage() {
    echo "Usage: $0 giturl destdir"
}

if [ -z "$1" -o -z "$2" ]
then
    print_usage
    exit 1
fi

CHECKOUTDIR="$(basename ${DESTDIR})"
SRCDIR="$(dirname ${DESTDIR})"

if [ ! -d "${SRCDIR}" ]
then
    echo "folder ${_YELLOW}local_src${_NOCOLOR} does not exist, please create it!"
    exit 4
fi

cd "${SRCDIR}"
if [ ! -d "${CHECKOUTDIR}" ]
then
    if [ -e "${CHECKOUTDIR}" ]
    then
        echo "${CHECKOUTDIR} exists but is no directory!"
        exit 2
    else
        echo "${CHECKOUTDIR} does not exist."
    fi

    if git clone "${GITURL}" "${CHECKOUTDIR}"
    then
        echo 'git clone successful ...'
    else
        exit $?
    fi

    cd "${CHECKOUTDIR}"
    if git fetch --all
    then
        echo 'git fetch successful ...'
    else
        exit $?
    fi
else
    if [ -L "${CHECKOUTDIR}" ]
    then
        echo "${_RED}WARNING: ${_YELLOW}${CHECKOUTDIR} is a symbolic link!${_NOCOLOR}"
        exit 0
    fi

    cd "${CHECKOUTDIR}"
    REMOTEURL="$(git remote -v | awk '/^origin.+(fetch)/ {print $2;}')"
    if [ "${REMOTEURL}" = "${GITURL}" ]
    then
        echo "This already cloned repo is the right one."
        exit 0
    else
        echo "Cloned repo remote is '${REMOTEURL}' but '${GITURL}' was expected!"
        exit 3
    fi
fi