Add spack installation CI for HIP backend #38

	# SPDX-FileCopyrightText: (C) The kokkos-fft development team, see COPYRIGHT.md file
	#
	# SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception

	name: CI (spack)

	on:
	pull_request:
	branches: [ "main" ]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	backend:
	- name: nvcc
	image: gcc
	kokkos: +cuda +wrapper cuda_arch=90
	spack_path: ""
	- name: rocm
	image: rocm
	kokkos: +rocm amdgpu_target=gfx90a
	spack_path: spack-configs/rocm

	steps:
	- name: Free Disk Space (Ubuntu)
	uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # v1.3.1
	with:
	tool-cache: true
	large-packages: false

	- name: Checkout built branch
	uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0

	- name: Clone and install spack
	run: \|
	docker run -v ${{ github.workspace }}:/work ghcr.io/kokkos/kokkos-fft/base_${{ matrix.backend.image }}:latest \
	bash -c "git clone --depth=2 --branch=v1.0.1 https://github.com/spack/spack.git"

	- name: Configure and build with CMake
	run: \|
	docker run -v ${{ github.workspace }}:/work ghcr.io/kokkos/kokkos-fft/base_${{ matrix.backend.image }}:latest \
	bash -c "source spack/share/spack/setup-env.sh && \
	cp spack-configs/repos.yaml spack/etc/spack/repos.yaml && \
	spack repo update && \
	export SPACK_USER_CONFIG_PATH=${{ matrix.backend.spack_path }} && \
	spack compiler find && \
	spack install kokkos-fft +tests ^kokkos ${{ matrix.backend.kokkos }} && \
	spack load kokkos kokkos-fft && \
	cmake -B install_test/as_library/build && \
	cmake --build install_test/as_library/build -j 4"

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