#!/bin/bash
# Description: This shell script used to generate patch file
#      Author: guowenxue <guowenxue@gmail.com>
#     Version: 1.0.0

# this project absolute path
PRJ_PATH=$(cd $(dirname "${BASH_SOURCE[0]}")/.. && pwd)

# top project absolute path
TOP_PATH=$(realpath $PRJ_PATH/..)

# config file path
CONF_FILE=$TOP_PATH/config.json

# shell script will exit once get command error
#set -e

#+-------------------------+
#| Shell script functions  |
#+-------------------------+

function pr_error() {
    echo -e "\033[40;31m $1 \033[0m"
}

function pr_warn() {
    echo -e "\033[40;33m $1 \033[0m"
}

function pr_info() {
    echo -e "\033[40;32m $1 \033[0m"
}

# parser configure file and export environment variable
function export_env()
{
    export SRC=$(basename $1)
    export BSP_VER=`jq -r ".bsp.version" $CONF_FILE | tr 'A-Z' 'a-z'`
    export PATCH=$SRC-$BSP_VER
}

function do_patch()
{
    if [ ! -d $PRJ_PATH/$SRC ] ;  then
        pr_error "\nERROR: source code $SRC not exist, exit now\n\n"
        exit;
    fi

    pr_info "generate patch file"

	cd $PRJ_PATH/$SRC

	git add .gitignore
	git add * 2> /dev/null

	git diff --cached > $PRJ_PATH/$PATCH.patch
}

if [ $# != 1 ] ; then
    pr_info "$0 usage example:"
    pr_info "$0 linux-imx/"
    exit
fi

export_env $1
do_patch