Add GitHub actions workflow to build release ISOs #1

	name: Release ISOs

	on:
	push:
	branches: [master, next, stable, staging]
	pull_request:
	branches: [master, next, stable, staging]

	jobs:
	build:
	runs-on: ubuntu-latest
	env:
	'SKIFF_WORKSPACE': intel-desktop
	'SKIFF_CONFIG': intel/desktop,skiff/core
	steps:
	- uses: actions/checkout@v4
	- name: Update the submodule
	run: \|
	cd $GITHUB_WORKSPACE
	git submodule update --init --recursive

	- name: Cache build cache and downloads
	uses: actions/cache@v4
	with:
	path: ~/br-cache/
	key: buildroot-r1-h${{ hashFiles('buildroot/Makefile') }}-ubuntu-latest
	restore-keys: \|
	buildroot-r1

	- name: Install buildroot apt deps
	run: \|
	sudo apt-get install -y libelf-dev python3-magic python3-flake8

	- name: Print help and packages list
	run: \|
	cd $GITHUB_WORKSPACE
	make help

	- name: Enable using a pre-built toolchain
	run: \|
	cd $GITHUB_WORKSPACE
	echo "BR2_TOOLCHAIN_EXTERNAL=y" > ./overrides/buildroot/toolchain

	- name: Compile the OS
	run: \|
	cd $GITHUB_WORKSPACE
	export TERM=xterm
	export BR2_CCACHE_DIR=${HOME}/br-cache/ccache
	export BR2_DL_DIR=${HOME}/br-cache/dl
	make -s configure compile check

	- name: Create an ISO image
	run: \|
	cd $GITHUB_WORKSPACE
	make cmd/intel/desktop/buildiso
	mkdir -p workflow-artifacts
	mv ./intel-desktop-image.iso ./workflow-artifacts/intel-desktop-image.iso

	- name: Upload ISO image artifact
	uses: actions/upload-artifact@v4
	with:
	name: intel-desktop-image.iso
	path: ${{ github.workspace }}/workflow-artifacts/intel-desktop-image.iso

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