Build Metal Library from Shell

metal-library-builder.sh

#!/bin/bash

# This is a gist from
# mtldoc.com
#
# If you want to know what the hell is happening here check
# https://mtldoc.com/metal/2022/06/18/build-swift-executable-with-metal-library.html

# Create intermediate representation from Metal files

METAL_FILES=`ls /path/to/metal/files/*.metal`

for path in $METAL_FILES
do
	FILE_NAME=${path%%.*}
	xcrun -sdk macosx metal -c $path -o ${FILE_NAME}.air
done

# Archive AIR files to single MetalAR file

AIR_FILES=`ls /path/to/air/files/*.air`

for path in $AIR_FILES
do
	xcrun metal-ar r default.metalar $path
done

# Build Metal Library from MetalAR archive

xcrun -sdk macosx metallib default.metalar -o default.metallib

# Clean up

rm default.metalar

for path in $AIR_FILES
do
	rm $path
done