Midas TWRP build script

midas_recovery.sh

SRC=/media/system/root/LOS15/kernel/samsung/midas
KERNEL_OUT=/ramdisk
ANDROID_OUT=/media/system/root/LOS15/out
GCC=/media/system/root/LOS15/prebuilts/gcc/linux-x86/arm/arm-eabi-7.4/bin/arm-linux-gnueabi-
TARGET=midas

#$ANDROID_OUT/host/linux-x86/bin/mkbootfs -d $ANDROID_OUT/target/product/$TARGET/system      \
#     $ANDROID_OUT/target/product/$TARGET/recovery/root  | $ANDROID_OUT/host/linux-x86/bin/minigzip > \
#     $ANDROID_OUT/target/product/$TARGET/recovery-ramdisk.img

make -j8  CFLAGS_MODULE="-fno-pic" -C $SRC O=$KERNEL_OUT ARCH=arm CROSS_COMPILE="`which ccache` $GCC" lineageos_i9300_defconfig
make -j8  CFLAGS_MODULE="-fno-pic" -C $SRC O=$KERNEL_OUT ARCH=arm CROSS_COMPILE="`which ccache` $GCC" zImage-dtb
if grep -q '^CONFIG_OF=y' $KERNEL_OUT/.config; then \
                        echo "Building DTBs"; \
                        make  CFLAGS_MODULE="-fno-pic" -C $SRC O=$KERNEL_OUT ARCH=arm CROSS_COMPILE="`which ccache` $GCC" dtbs; \
                fi

OUTPUT=$ANDROID_OUT/target/product/$TARGET/recovery-$(git rev-parse --abbrev-ref HEAD).img

cp $KERNEL_OUT/arch/arm/boot/zImage-dtb $ANDROID_OUT/target/product/$TARGET/kernel
$ANDROID_OUT/host/linux-x86/bin/mkbootimg  \
  --kernel $ANDROID_OUT/target/product/$TARGET/kernel \
  --ramdisk $ANDROID_OUT/target/product/$TARGET/ramdisk-recovery.img \
  --base 0x40000000 \
  --pagesize 2048 \
  --cmdline "console=ttySAC2,115200 buildvariant=userdebug" \
  --os_version 7.1.2 \
  --os_patch_level 2018-09-05  \
  --output $OUTPUT

size=$(for i in $OUTPUT; do stat --format "%s" "$i" | tr -d '\n'; echo +; done; echo 0);
total=$(( $( echo "$size" ) ));
printname=$(echo -n "$OUTPUT" | tr " " +);
img_blocksize=4224;
twoblocks=$((img_blocksize * 2)); onepct=$(((((8650752 / 100) - 1) / img_blocksize + 1) * img_blocksize));
reserve=$((twoblocks > onepct ? twoblocks : onepct));
maxsize=$((8650752 - reserve));

echo "$printname maxsize=$maxsize blocksize=$img_blocksize total=$total reserve=$reserve";

if [ "$total" -gt "$maxsize" ]; then 
  echo "error: $printname too large ($total > [8650752 - $reserve])"; false;
elif [ "$total" -gt $((maxsize - 32768)) ]; then
  echo "WARNING: $printname approaching size limit ($total now; limit $maxsize)";
fi