makebr

#!/bin/bash

# Copyright (C) 2018 David De Grave <david@ledav.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Made by David De Grave, 2017
# david.degrave@mind.be

# CONFIG
PROJECT="bbb-station"
BOARD="beaglebone"
SUFFIX="master"

BUILDROOT_REPO="git://git.buildroot.net/buildroot.git"
BUILDROOT_BRANCH="master"
BUILDROOT_TAG="2019.02.1"
###

BASE_DIR="${PWD}"
CONFIG_DIR="${BASE_DIR}/configs"
BUILD=${PROJECT}_${BOARD}
DEFCONFIG="${PROJECT}_${BOARD}_defconfig"
EXTERNAL="../projects/${PROJECT}"
OUTPUT="${BASE_DIR}/o-${BUILD}"

# Space separated list of tools required for the build
# (Basically the non common tools used in all *-hook scripts)
HOSTDEPTOOLS=(git)

. scripts/include/log || exit 1

extra=
overrides=
debug=0
init=0
rebuild=0
reinstall=0
srconly=0
build=normal
make=make

while [ "${1:0:2}" == '--' ]; do
	case $1 in
	 --j)		extra+=" BR2_JLEVEL=$2"; shift;;
	 --rebuild)	rebuild=1;;
	 --reinstall)	reinstall=1;;
	 --low)		make="nice -n 5 -- $make";;
	 --debug)	debug=1;;
	 --brief)	build=brief;;
	 --init)	init=1;;
	 --source)	srconly=1;;
	 *)
		echo "--init      Just download/update external objects"
		echo "--source    Just go 1 step further and download all the buildroot packages too"
	 	echo "--rebuild   Restart the build from scratch"
		echo "--reinstall Force the reinstall of target without a full rebuild"
	 	echo "--debug     Create a debug build"
	 	echo "--brief     Create a log file and show lesser outputs"
		echo "--low       Start building with a lower ressources priority"
		echo "--j <n>     Use max <n> cpus"
	 	exit;;
	esac
	shift
done

for tool in ${HOSTDEPTOOLS[*]}; do
	which $tool &> /dev/null || \
	  die "The tool '${C_LCY}${tool}${C_NRM}' is missing and required ! Please install it before continuing ..."
done

clone_if_new() {
# Clone a repository if it doesn't exist yet
# $1 = directory name, e.g. buildroot
# $2 = remote repository, e.g. $BUILDROOT_REPO
# $3 = branch name, e.g. $BUILDROOT_BRANCH
# $4 = optional tag name to stick to, e.g. $BUILDROOT_TAG

	if [ ! -d "$1" ]; then
		log "Retreiving buildroot from upstream ..."

		if ! git ls-remote --heads "$2" "$3" > /dev/null; then
			echo
			echo "There was a problem retreiving buildroot..."
			echo
			echo "Make sure that:"
			echo "  1. The repository is the right one: $2"
			echo "  2. Your ssh key is registered at the remote."
			echo "  3. You have (read) access to this repository."
			echo "  4. The branch '$3' exists."
			[ $4 ] && \
			echo "  5. The tag '$4' exist."
			exit 1
		fi
		log "Cloning branch '$3' from $2 ..."
		git clone --branch "$3" "$2" "$1" || die "Exit code $?"
		if [ $4 ]; then
			log "Checking out tag '$4'"
			git -C "$1" checkout "$4" 2>&1 | grep "^HEAD" || die "Exit code $?"
		fi
	fi
	return 0
}

clone_if_new buildroot "$BUILDROOT_REPO" "$BUILDROOT_BRANCH" "$BUILDROOT_TAG"

if [ $init -eq 1 ]; then
	log "Externals downloaded ..."
	exit 0
fi

if [ ! -f "${CONFIG_DIR}/$DEFCONFIG" ]; then
	echo "defconfig '$DEFCONFIG' not found !"
	exit 2
fi

if   [ $rebuild -eq 1 ]; then
	read -p "Sure to cleanup everything ?!! (CTRL-C to abord)"
	[ -e "$OUTPUT/debug_build" ] && mv "$OUTPUT/debug_build" /tmp/~debug_build.$$
	rm -rf "$OUTPUT" "$BUILD.log"
elif [ $reinstall -eq 1 ]; then
	find $OUTPUT/build -regex '.*\.stamp_.*\(built\|installed\)' -delete
	rm -rf $OUTPUT/{final,staging} $OUTPUT/{host,images,target}/*
fi

brief() {
	local ret start d h m mf sf line

	start=${SECONDS}

	$make -C buildroot "O=$OUTPUT" $extra "${@}" 2>&1 | ( \
		while read line; do
			printf "%(%H:%M:%S)T %s\n" -1 "${line}"
		done \
		|tee -a ${BUILD}.log \
		|grep --line-buffered --colour=never -E '>>>'
	)
	ret=${PIPESTATUS[0]}

	d=$((SECONDS-start))
	printf "Done in "
	h=$((d/3600))
	d=$((d%3600))
	[ ${h} -eq 0 ] || { printf "%dh " ${h}; mf="02"; }
	m=$((d/60))
	d=$((d%60))
	[ ${m} -eq 0 ] || { printf "%${mf}dmin " ${m}; sf="02"; }
	printf "%${sf}ds\n" ${d}
	
	return ${ret}
}

normal() {
	$make -C buildroot "O=$OUTPUT" $extra "$@"
	return $?
}

if [ ! -e "$OUTPUT" ]; then
	mv /tmp/~debug_build.$$ "$OUTPUT/debug_build" 2>/dev/null
	if [ $debug -eq 1 ]; then
		[ -e "$OUTPUT/debug_build" ] || cp -a configs/debug_build "$OUTPUT"
		${EDITOR:-vi} "$OUTPUT/debug_build"
		touch "$OUTPUT/debug_build"
	fi
	mkdir -p dl
	log "Configuring buildroot ..."
	overrides+=" BR2_EXTERNAL=$EXTERNAL"
	overrides+=" BR2_DEFCONFIG=$CONFIG_DIR/$DEFCONFIG"
	$build defconfig $overrides || die "Error code $?"
	# Patching the config to change the download dir
	sed -i -e 's/\(^BR2_DL_DIR=\).*/\1"..\/dl"/' "$OUTPUT/.config"

	log "Downloading/checking all the source packages ..."
	$build source || die "Error code $?"
fi

if [ $srconly -eq 1 ]; then
	log "Sources/Externals downloaded ..."
	exit 0
fi

log "Start building $(date)"
$build "${@}" || die "Error code $?"
log "Build well done $(date)"

exit 0