build.sh

#!/bin/bash
#
# Copyright (C) 2019-2024 Panagiotis Englezos <panagiotisegl@gmail.com>
#
# SPDX-License-Identifier: Apache-2.0
#

# Override host metadata to make builds more reproducible and avoid leaking info
export BUILD_USERNAME=penglezos
export BUILD_HOSTNAME=android-build

# Device defaults
DEVICE='raphael'
BUILD_TYPE='userdebug'

# Setup ccache
export CCACHE_EXEC=$(command -v ccache)
export CCACHE_DIR=$(pwd)/.ccache
export USE_CCACHE=1
ccache -M 50G

# Setup zram
zram () {
    sudo swapoff --all
    sudo modprobe zram
    sudo zramctl /dev/zram0 --algorithm zstd --size 64G
    sudo mkswap -U clear /dev/zram0
    sudo swapon --priority 100 /dev/zram0
}

# Clean sources
clean () {
    source build/envsetup.sh
    breakfast ${DEVICE} ${BUILD_TYPE}
    make clean
}

installclean () {
    source build/envsetup.sh
    breakfast ${DEVICE} ${BUILD_TYPE}
    make installclean
}

# Sync sources & apply patches
sync () {
    repo init -u https://github.com/LineageOS/android.git -b lineage-21.0 --git-lfs
    rm -rf .repo/local_manifests && mkdir -p .repo/local_manifests
    curl https://raw.githubusercontent.com/penglezos/android_vendor_extra/lineage-21/.repo/local_manifests/lineage.xml -o .repo/local_manifests/lineage.xml
    repo sync -c -j$(nproc --all) --force-sync --no-clone-bundle --no-tags

    . build/envsetup.sh
    croot
    
    PATCHES_PATH=$PWD/vendor/extra/patches

    for project_name in $(cd "${PATCHES_PATH}"; echo */); do
        project_path="$(tr _ / <<<$project_name)"

        cd $(gettop)/${project_path}
        git am "${PATCHES_PATH}"/${project_name}/*.patch --no-gpg-sign
        git am --abort &> /dev/null
    done

    croot
}

# Build ROM
build () {
    source build/envsetup.sh
    breakfast ${DEVICE} ${BUILD_TYPE}
    make bacon
    ./tools/generatejson.sh
}

# Build kernel image
kernel () {
    source build/envsetup.sh
    breakfast ${DEVICE} ${BUILD_TYPE}
    make bootimage
}

# Build recovery image
recovery () {
    source build/envsetup.sh
    breakfast ${DEVICE} ${BUILD_TYPE}
    make recoveryimage
}

# Usage information when there are no arguments
if [[ $# -eq 0 ]]; then
	echo -e "\nUsage: ./build.sh [options]\n"
	echo "Options:"
    echo "  -z, --zram                     Setup zram"
	echo "  -c, --clean                    Clean entire build directory"
	echo "  -i, --installclean             Dirty build"
	echo "  -s, --sync                     Sync sources and apply patches"
	echo "  -b, --build                    Perform ROM build"
	echo "  -k, --kernel                   Perform kernel image build"
	echo "  -r, --recovery                 Perform recovery image build"
	echo ""
	exit 0
fi

# Parse arguments
while [[ "$#" -gt 0 ]]; do case $1 in
    -z|--zram) zram;;
	-c|--clean) clean;;
	-i|--installclean) installclean;;
	-s|--sync) sync;;
	-b|--build) build;;
	-k|--kernel) kernel;;
    -r|--recovery) recovery;;
	*) echo "Unknown parameter passed: $1"; exit 1;;
esac; shift; done