[documentation]: Add Mac OS troubleshooting guide #196

	name: check_version
	on: pull_request
	jobs:
	check_version_numbers:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: set environment
	run: \|
	echo "python_version=$(grep '__version__' pypolychord/__init__.py \| grep -oe '[0-9]\+\.[0-9]\+\.[0-9]')" >> $GITHUB_ENV
	echo "fortran_version=$(grep 'version' src/polychord/feedback.f90 \| grep -oe '[0-9]\+\.[0-9]\+\.[0-9]')" >> $GITHUB_ENV
	echo "readme_version=$(grep 'PolyChord v' README.rst \| grep -oe '[0-9]\+\.[0-9]\+\.[0-9]')" >> $GITHUB_ENV
	- name: Check python matches fortran version number
	if: env.python_version != env.fortran_version
	run: \|
	echo "python version: $python_version"
	echo "fortran version: $fortran_version"
	exit 1
	- name: Check fortran matches readme version number
	if: env.fortran_version != env.readme_version
	run: \|
	echo "fortran version: $fortran_version"
	echo "readme version: $readme_version"
	exit 1
	- name: Check readme matches python version number
	if: env.readme_version != env.python_version
	run: \|
	echo "readme version: $readme_version"
	echo "python version: $python_version"
	exit 1

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