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: ${VM_CACHE:?} ${VM_DATA:?}
alpine_url=https://dl-cdn.alpinelinux.org/alpine/v3.18/releases/armv7/alpine-uboot-3.18.4-armv7.tar.gz
alpine_path=$VM_CACHE/$(basename -- "$alpine_url")
kernel_path=$VM_CACHE/vmlinuz-lts
initrd_path=$VM_CACHE/initramfs-lts
image_path=$VM_DATA/alpine.qcow2
if [ ! -f $alpine_path ]; then
curl -L -o $alpine_path $alpine_url
fi
if [ ! -f $kernel_path ]; then
tar -x -f $alpine_path -C $(dirname $kernel_path) \
--strip-components=2 ./boot/$(basename $kernel_path)
fi
if [ ! -f $initrd_path ]; then
tar -x -f $alpine_path -C $(dirname $initrd_path) \
--strip-components=2 ./boot/$(basename $initrd_path)
fi
if [ ! -f $image_path ]; then
qemu-img create -f qcow2 $image_path 20G
fi
exec qemu-system-arm \
-M virt \
-m 1G \
-cpu cortex-a15 \
-kernel $kernel_path \
-initrd $initrd_path \
-append "console=ttyAMA0" \
-hda $image_path \
-nographic \
"$@"
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