diskimage-builder/elements/architecture-emulation-binaries/extra-data.d/01-copy-binary

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#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
function clean_up_arch_emulation {
cat <<EOF >$TMP_MOUNT_PATH/tmp/clean_up_qemu_binary
#!/bin/bash
set -eux
set -o pipefail
sudo rm -rf "${TMP_MOUNT_PATH}${1}"
EOF
sudo chmod +x "$TMP_MOUNT_PATH/tmp/clean_up_qemu_binary"
}
function check_copy_file {
if [ -f "$1" ] ; then
if [ ! -f "${TMP_MOUNT_PATH}${1}" ]; then
sudo cp "$1" "$TMP_MOUNT_PATH/usr/bin"
clean_up_arch_emulation $1
fi
else
echo "qemu binary file not found."
exit 1
fi
}
function copy_binary {
echo "checking for architecture compatibility..."
img_arch=$2
if [[ "$host_arch" != "$img_arch" ]]; then
qemu_binary=$1
check_copy_file $qemu_binary
else
echo "Emulation not required for this host/image architecture combination"
fi
}
host_arch="$(uname -m)"
case "$ARCH" in
"i386" | "amd64")
qemu_binary_file="/usr/bin/qemu-i386-static"
copy_binary $qemu_binary_file $ARCH
;;
"armhf")
qemu_binary_file="/usr/bin/qemu-arm-static"
copy_binary $qemu_binary_file $ARCH
;;
"arm64")
qemu_binary_file="/usr/bin/qemu-aarch64-static"
copy_binary $qemu_binary_file $ARCH
;;
*)
echo "architecture not supported"
exit 1
;;
esac