conda builds #349

	name: conda builds

	on:
	pull_request:
	paths:
	- 'conda-environment.yml'
	- '.github/workflows/test_conda-build.yml'
	schedule:
	- cron: '17 22 * * 6' # Every Saturday at 22:17
	workflow_dispatch:

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

	jobs:
	test_conda_install:
	runs-on: ubuntu-latest
	timeout-minutes: 10
	steps:
	- name: checkout cylc-flow
	uses: actions/checkout@v4

	- name: build conda env
	run: \|
	# write environment file
	env_file='conda-environment.yml'
	echo " - pip" >> "$env_file" # list pip as a dependency
	echo " - pip:" >> "$env_file" # add a pip section
	echo " - ." >> "$env_file" # install cylc-flow (pip install .)
	cat "$env_file"
	# install environment
	conda env create \
	-f "$env_file" \
	--prefix cylc-dev
	. /usr/share/miniconda/etc/profile.d/conda.sh
	# check cylc-flow was installed correctly
	conda run --prefix cylc-dev cylc version --long

	- name: check for activate scripts
	run: \|
	# https://github.com/cylc/cylc-flow/issues/3704#issuecomment-897442365
	# locate all activate scripts
	find ./cylc-dev/ -name "activate.d" \| tee > activates.txt
	# ignore the conda activate script itself
	sed -i '/cylc-dev\/etc\/conda\/activate.d/d' activates.txt
	# check to make sure no packages have contributed new activate scripts
	# (we rely on having a conda activate-less environment)
	if [[ $(cat activates.txt \| wc -l) -ne 0 ]]; then
	echo '::error::Found activate scripts in installation.'
	cat activates.txt >&2
	exit 1
	fi

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