Build

Enhance install instructions #56

	name: Build

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build:
	name: Build for (${{ matrix.python-version }}, ${{ matrix.os }})
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: true
	matrix:
	os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
	python-version: ['3.9', '3.10', '3.11', '3.12']
	gcc-version: ['12']
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Python info
	shell: bash -e {0}
	run: \|
	which python
	python --version
	- name: Install Fortran compiler on Ubuntu
	if: matrix.os == 'ubuntu-latest'
	run: sudo apt-get update && sudo apt-get install -y gfortran
	- name: Install Fortran compiler on macOS
	if: matrix.os == 'macos-latest'
	run: \|
	brew install gcc@${{ matrix.gcc-version }}
	echo "FC=gfortran-${{ matrix.gcc-version }}" >> "$GITHUB_ENV"
	echo "CC=gcc-${{ matrix.gcc-version }}" >> "$GITHUB_ENV"
	- name: Install Fortran compiler on Windows
	if: matrix.os == 'windows-latest'
	run: choco install mingw
	- name: Install dependencies
	if: steps.cache-virtualenv.outputs.cache-hit != 'true'
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -e .[develop]
	- name: Upgrade pip and install dependencies on other OS
	if: matrix.os != 'macos-latest'
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -e .[develop]
	- name: Verify that we can build the package
	run: \|
	python -m pip install build
	python -m build

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