#!/bin/bash
#
# Copyright (c) 2015 Igor Pecovnik, igor.pecovnik@gma**.com
#
# This file is licensed under the terms of the GNU General Public
# License version 2. This program is licensed "as is" without any
# warranty of any kind, whether express or implied.
#
# This file is a part of the Armbian build script
# https://github.com/armbian/build/

# DO NOT EDIT THIS FILE
# use configuration files like config-default.conf to set the build configuration
# check Armbian documentation for more info

SRC="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"

# check for whitespace in $SRC and exit for safety reasons
grep -q "[[:space:]]" <<<"${SRC}" && { echo "\"${SRC}\" contains whitespace. Not supported. Aborting." >&2 ; exit 1 ; }

cd "${SRC}" || exit

if [[ -f "${SRC}"/lib/general.sh ]]; then
	# shellcheck source=lib/general.sh
	source "${SRC}"/lib/general.sh
else
	echo "Error: missing build directory structure"
	echo "Please clone the full repository https://github.com/armbian/build/"
	exit 255
fi

if [[ $EUID == 0 ]] || [[ "$1" == vagrant ]]; then
	:
elif [[ "$1" == docker || "$1" == dockerpurge || "$1" == docker-shell ]] && grep -q `whoami` <(getent group docker); then
	:
else
	display_alert "This script requires root privileges, trying to use sudo" "" "wrn"
	sudo "$SRC/compile.sh" "$@"
	exit $?
fi

update_src() {
	cd "${SRC}" || exit
	if [[ ! -f $SRC/.ignore_changes ]]; then
		echo -e "[\e[0;32m o.k. \x1B[0m] This script will try to update"
		git pull
		CHANGED_FILES=$(git diff --name-only)
		if [[ -n $CHANGED_FILES ]]; then
			echo -e "[\e[0;35m warn \x1B[0m] Can't update since you made changes to: \e[0;32m\n${CHANGED_FILES}\x1B[0m"
			while true; do
				echo -e "Press \e[0;33m<Ctrl-C>\x1B[0m or \e[0;33mexit\x1B[0m to abort compilation, \e[0;33m<Enter>\x1B[0m to ignore and continue, \e[0;33mdiff\x1B[0m to display changes"
				read -r
				if [[ "$REPLY" == "diff" ]]; then
					git diff
				elif [[ "$REPLY" == "exit" ]]; then
					exit 1
				elif [[ "$REPLY" == "" ]]; then
					break
				else
					echo "Unknown command!"
				fi
			done
		else
			git checkout "${LIB_TAG:-master}"
		fi
	fi
}

TMPFILE=`mktemp`
echo SRC=$SRC > $TMPFILE
echo LIB_TAG=$LIB_TAG >> $TMPFILE
declare -f update_src >> $TMPFILE
echo update_src >> $TMPFILE

#do not update/checkout git with root privileges to messup files onwership.
#due to in docker/VM, we can't su to a normal user, so do not update/checkout git.
if [[ `systemd-detect-virt` == 'none' ]]; then
	if [[ $EUID == 0 ]]; then
		su `stat --format=%U $SRC/.git` -c "bash $TMPFILE"
	else
		bash $TMPFILE
	fi
fi

rm $TMPFILE

# Check for Vagrant
if [[ "$1" == vagrant && -z "$(which vagrant)" ]]; then
	display_alert "Vagrant not installed." "Installing"
	sudo apt-get update
	sudo apt-get install -y vagrant virtualbox
fi

if [[ "$1" == dockerpurge && -f /etc/debian_version ]]; then
	display_alert "Purging Armbian Docker containers" "" "wrn"
	docker container ls -a | grep armbian | awk '{print $1}' | xargs docker container rm &> /dev/null
	docker image ls | grep armbian | awk '{print $3}' | xargs docker image rm &> /dev/null
	shift
	set -- "docker" "$@"
fi

if [[ "$1" == docker-shell ]]; then
	shift
	SHELL_ONLY=yes
	set -- "docker" "$@"
fi

# Install Docker if not there but wanted. We cover only Debian based distro install. Else, manual Docker install is needed
if [[ "$1" == docker && -f /etc/debian_version && -z "$(which docker)" ]]; then
	display_alert "Docker not installed." "Installing" "Info"
	echo "deb [arch=amd64] https://download.docker.com/linux/$(lsb_release -is | awk '{print tolower($0)}') $(lsb_release -cs) edge" > /etc/apt/sources.list.d/docker.list

	# minimal set of utilities that are needed for prep
	packages=("curl" "gnupg" "apt-transport-https")
	for i in "${packages[@]}"
	do
	[[ ! $(which $i) ]] && install_packages+=$i" "
	done
	[[ -z $install_packages ]] && apt-get update;apt-get install -y -qq --no-install-recommends $install_packages

	curl -fsSL "https://download.docker.com/linux/$(lsb_release -is | awk '{print tolower($0)}')/gpg" | apt-key add -qq - > /dev/null 2>&1
	export DEBIAN_FRONTEND=noninteractive
	apt-get update
	apt-get install -y -qq --no-install-recommends docker-ce
	display_alert "Add yourself to docker group to avoid root privileges" "" "wrn"
	"$SRC/compile.sh" "$@"
	exit $?
fi

# Create userpatches directory if not exists
mkdir -p $SRC/userpatches

# Create example configs if none found in userpatches
if ! ls ${SRC}/userpatches/{config-example.conf,config-docker.conf,config-vagrant.conf} 1> /dev/null 2>&1; then

	# Migrate old configs
	if ls ${SRC}/*.conf 1> /dev/null 2>&1; then
		display_alert "Migrate config files to userpatches directory" "all *.conf" "info"
                cp "${SRC}"/*.conf "${SRC}"/userpatches  || exit 1
		rm "${SRC}"/*.conf
		[[ ! -L "${SRC}"/userpatches/config-example.conf ]] && ln -fs config-example.conf "${SRC}"/userpatches/config-default.conf || exit 1
	fi

	display_alert "Create example config file using template" "config-default.conf" "info"

	# Create example config
	if [[ ! -f "${SRC}"/userpatches/config-example.conf ]]; then
		cp "${SRC}"/config/templates/config-example.conf "${SRC}"/userpatches/config-example.conf || exit 1
                ln -fs config-example.conf "${SRC}"/userpatches/config-default.conf || exit 1
	fi

	# Create Docker config
	if [[ ! -f "${SRC}"/userpatches/config-docker.conf ]]; then
		cp "${SRC}"/config/templates/config-docker.conf "${SRC}"/userpatches/config-docker.conf || exit 1
	fi

	# Create Docker file
        if [[ ! -f "${SRC}"/userpatches/Dockerfile ]]; then
                cp "${SRC}"/config/templates/Dockerfile "${SRC}"/userpatches/Dockerfile || exit 1
        fi

	# Create Vagrant config
	if [[ ! -f "${SRC}"/userpatches/config-vagrant.conf ]]; then
	        cp "${SRC}"/config/templates/config-vagrant.conf "${SRC}"/userpatches/config-vagrant.conf || exit 1
	fi

	# Create Vagrant file
	if [[ ! -f "${SRC}"/userpatches/Vagrantfile ]]; then
		cp "${SRC}"/config/templates/Vagrantfile "${SRC}"/userpatches/Vagrantfile || exit 1
	fi

fi

if [[ -z "$CONFIG" && -n "$1" && -f "${SRC}/userpatches/config-$1.conf" ]]; then
	CONFIG="userpatches/config-$1.conf"
	shift
fi

# usind default if custom not found
if [[ -z "$CONFIG" && -f "${SRC}/userpatches/config-default.conf" ]]; then
	CONFIG="userpatches/config-default.conf"
fi

# source build configuration file
CONFIG_FILE="$(realpath "$CONFIG")"

if [[ ! -f $CONFIG_FILE ]]; then
	display_alert "Config file does not exist" "$CONFIG" "error"
	exit 254
fi

CONFIG_PATH=$(dirname "$CONFIG_FILE")

display_alert "Using config file" "$CONFIG_FILE" "info"
pushd $CONFIG_PATH > /dev/null
# shellcheck source=/dev/null
source "$CONFIG_FILE"
popd > /dev/null

[[ -z "${USERPATCHES_PATH}" ]] && USERPATCHES_PATH="$CONFIG_PATH"

# Script parameters handling
while [[ $1 == *=* ]]; do
    parameter=${1%%=*}
    value=${1##*=}
    shift
    display_alert "Command line: setting $parameter to" "${value:-(empty)}" "info"
    eval "$parameter=\"$value\""
done

if [[ $BUILD_ALL == yes || $BUILD_ALL == demo ]]; then
	# shellcheck source=lib/build-all-ng.sh
	source "${SRC}"/lib/build-all-ng.sh
else
	# shellcheck source=lib/main.sh
	source "${SRC}"/lib/main.sh
fi