Add mpi to `bands_plot` #198

	name: CI

	on:
	pull_request:
	push:
	branches:
	- develop

	jobs:
	pre-commit:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-python@v2
	- uses: pre-commit/[email protected]

	build:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	w90-binary-parallel: [ 'false', 'true' ]
	name: Build and test `parallel=${{ matrix.w90-binary-parallel }}`
	steps:
	- name: checkout
	uses: actions/checkout@v2
	- name: setup python
	uses: actions/setup-python@v2
	with:
	python-version: 3.6
	- name: install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install \
	gfortran \
	libblas-dev \
	liblapack-dev \
	openmpi-bin \
	libopenmpi-dev
	pip install --upgrade pip
	pip install \
	numpy \
	matplotlib \
	- name: build
	env:
	W90BINARYPARALLEL: ${{ matrix.w90-binary-parallel }}
	run: \|
	if [ "$W90BINARYPARALLEL" == "true" ] ; then
	cp ./.github/workflows/config/make.inc.gfort+openmpi ./make.inc
	else
	cp ./.github/workflows/config/make.inc.gfort ./make.inc
	fi
	#make -j default w90chk2chk libs
	make all
	- name: run tests
	env:
	W90BINARYPARALLEL: ${{ matrix.w90-binary-parallel }}
	run: \|
	./.github/workflows/run_tests.sh
	- name: compute coverage
	uses: codecov/codecov-action@v1
	- name: archive test results
	if: ${{ always() }}
	uses: actions/upload-artifact@v2
	with:
	name: test-results_parallel=${{ matrix.w90-binary-parallel }}
	path: \|
	test-suite/tests/test/test.err
	test-suite/tests/test/test.out

Provide feedback