[DEV]: add pixi.lock and add pixi to pyproject.toml #1

	---
	name: Check pixi lockfile
	# check that pixi.lock is consistent with pyproject.toml and ask user to
	# regenerate and commit if not.

	on:
	pull_request:
	paths:
	- pyproject.toml
	- pixi.lock
	- .github/workflows/pixi-lock-check.yml
	push:
	branches: [main]
	paths:
	- pyproject.toml
	- pixi.lock
	- .github/workflows/pixi-lock-check.yml

	jobs:
	check-lockfile:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Set up pixi
	uses: prefix-dev/[email protected]
	with:
	run-install: false
	manifest-path: pyproject.toml

	- name: Check that pixi.lock is up to date
	run: \|
	if ! pixi install --locked --manifest-path pyproject.toml; then
	echo "::error file=pixi.lock::pixi.lock is not consistent with pyproject.toml. Run 'pixi lock' locally and commit the updated pixi.lock."
	exit 1
	fi

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