update gresho problem to take Mach number as input #1113

	name: wdmerger_collision

	on: [pull_request]

	concurrency:
	group: ${{ github.ref }}-${{ github.head_ref }}-${{ github.workflow }}
	cancel-in-progress: true

	jobs:
	wdmerger_collision-2d:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Get submodules
	run: \|
	git submodule update --init
	cd external/Microphysics
	git fetch; git checkout development
	cd ../amrex
	git fetch; git checkout development
	cd ../..

	- name: Install dependencies
	run: \|
	sudo apt-get update -y -qq
	sudo apt-get -qq -y install curl cmake jq clang g++>=9.3.0

	- name: Build the fextrema tool
	run: \|
	cd external/amrex/Tools/Plotfile
	make programs=fextrema -j4

	- name: Compile wdmerger 2D
	run: \|
	cd Exec/science/wdmerger
	make USE_MPI=FALSE DIM=2 -j4

	- name: Run wdmerger 2D
	run: \|
	cd Exec/science/wdmerger
	cp tests/wdmerger_collision/inputs_2d_collision.test .
	cp tests/wdmerger_collision/inputs_2d_collision .
	./Castro2d.gnu.ex inputs_2d_collision.test amr.plot_files_output=1 castro.output_at_completion=1

	- name: Check the extrema
	run: \|
	cd Exec/science/wdmerger
	../../../external/amrex/Tools/Plotfile/fextrema.gnu.ex plt00086 > fextrema.out
	diff fextrema.out ci-benchmarks/wdmerger_collision_2D.out

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