Currently, here is the relevant code in 10_linux for detecting initrds:
initrd_real=
for i in "initrd.img-${version}" "initrd-${version}.img"
"initrd-${version}.gz" \
"initrd-${version}" "initramfs-${version}.img" \
"initrd.img-${alt_version}" "initrd-${alt_version}.img" \
"initrd-${alt_version}" "initramfs-${alt_version}.img" \
"initramfs-genkernel-${version}" \
"initramfs-genkernel-${alt_version}" \
"initramfs-genkernel-${GENKERNEL_ARCH}-${version}" \
"initramfs-genkernel-${GENKERNEL_ARCH}-${alt_version}"; do
if test -e "${dirname}/${i}" ; then
initrd_real="${i}"
break
fi
done
Notice that it does not include initramfs-${version} or
initramfs-${alt_version} and variations thereof.
These are the names generated under Alpine Linux.
As such, please add variations to all existing initramfs-* options,
excluding ".img".
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