add a distance function #1453

	name: Rad2Tshock

	on: [pull_request]
	jobs:
	Rad2Tshock-1d:
	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 libopenmpi-dev openmpi-bin

	- name: Install hypre
	run: \|
	wget -q https://github.com/hypre-space/hypre/archive/refs/tags/v2.26.0.tar.gz
	tar xfz v2.26.0.tar.gz
	cd hypre-2.26.0/src
	./configure --with-cxxstandard=17
	make -j 4
	make install
	cd ../../

	- name: Compile Rad2Tshock
	run: \|
	export AMREX_HYPRE_HOME=${PWD}/hypre-2.26.0/src/hypre
	cd Exec/radiation_tests/Rad2Tshock
	make DEBUG=TRUE USE_MPI=TRUE DIM=1 -j 4

	- name: Run Rad2Tshock-1d
	run: \|
	cd Exec/radiation_tests/Rad2Tshock
	./Castro1d.gnu.DEBUG.MPI.ex inputs.M2 max_step=25

	- name: Build the fextrema tool
	run: \|
	cd external/amrex/Tools/Plotfile
	make programs=fextrema -j 4

	- name: Check the extrema
	run: \|
	cd Exec/radiation_tests/Rad2Tshock
	../../../external/amrex/Tools/Plotfile/fextrema.gnu.ex plt_00025 > fextrema.out
	diff fextrema.out ci-benchmarks/Rad2TShock-1d.out

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