Java Runtime Universal Binary (x86_64+arm64)

universal-jre.sh

#!/bin/sh -e

UNIVERSAL_JDK=$(pwd)/$3
ARM64_JDK=$(pwd)/$1
X86_64_JDK=$(pwd)/$2

${ARM64_JDK}/Contents/Home/bin/jlink --add-modules ALL-MODULE-PATH --strip-debug --no-man-pages --no-header-files --compress=2 --output ${ARM64_JDK}/Contents/jre
rm -rf ${ARM64_JDK}/Contents/Home
mv  ${ARM64_JDK}/Contents/jre  ${ARM64_JDK}/Contents/Home

${X86_64_JDK}/Contents/Home/bin/jlink --add-modules ALL-MODULE-PATH --strip-debug --no-man-pages --no-header-files --compress=2 --output ${X86_64_JDK}/Contents/jre
rm -rf ${X86_64_JDK}/Contents/Home
mv  ${X86_64_JDK}/Contents/jre  ${X86_64_JDK}/Contents/Home

# We ditto both in case there is something present in one but not both.
ditto ${ARM64_JDK} ${UNIVERSAL_JDK}
ditto ${X86_64_JDK} ${UNIVERSAL_JDK}

for subdir in MacOS Home/bin Home/lib ; do
    pushd ${UNIVERSAL_JDK}/Contents/${subdir}

    find . -type f | while read file ; do
        FILE_TYPE=$(file "${file}")
        [[ ${FILE_TYPE} =~ "Mach-O" ]] || continue

        if [[ -f "${ARM64_JDK}/Contents/${subdir}/${file}" && -f "${X86_64_JDK}/Contents/${subdir}/${file}" ]] ; then
            lipo -output ${file} -create ${ARM64_JDK}/Contents/${subdir}/${file} ${X86_64_JDK}/Contents/${subdir}/${file}
        fi
    done
done

sed -i '' 's:x86_64:x86_64+arm64:' ${UNIVERSAL_JDK}/Contents/Home/release