add new function for warmstart (#688) #1196

	name: Spack Builds

	on: [push]

	jobs:
	hiop_spack_builds:
	runs-on: ubuntu-22.04
	container: spack/ubuntu-jammy:latest
	strategy:
	matrix:
	spack_spec:
	- hiop@develop+mpi~raja~shared~kron~sparse ^openmpi ^libevent~openssl
	- hiop@develop~mpi~raja~shared~kron~sparse ^libevent~openssl
	- hiop@develop~mpi+raja~shared~kron~sparse ^libevent~openssl

	# We will need coinhsl for this, but what are the rules for using
	# a coinhsl tarball?
	# - hiop@develop~mpi~raja~shared~kron+sparse

	name: Build HiOp with Spack
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	submodules: recursive

	- name: Build Environment
	env:
	SPACK_SPEC: ${{ matrix.spack_spec }}
	run: \|
	ls && pwd
	. /opt/spack/share/spack/setup-env.sh
	spack debug report
	# Just use the public mirror to bootstrap concretizer
	# https://spack.io/spack-binary-packages
	spack mirror add spack_public_mirror https://binaries.spack.io/develop
	spack buildcache keys --install --trust
	# Need to create an environment to install hiop in the action's branch
	spack env create -d ./spack-env
	spack env activate ./spack-env
	spack add $SPACK_SPEC target=x86_64
	spack develop --path $(pwd) --no-clone hiop@develop
	spack external find --all --exclude python
	spack concretize --reuse
	git config --global --add safe.directory $(pwd)
	spack --stacktrace install --fail-fast

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