Add API documentation workflow #8

	name: Generate API documentation

	on:
	pull_request:
	branches:
	- develop

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v3
	with:
	ref: ${{ github.head_ref }}

	- name: Set MATHESAR_DATABASES environment variable
	run: \|
	echo "export MATHESAR_DATABASES=postgresql://localhost:5432/mathesar" >> $GITHUB_ENV

	- name: Build Docker image
	run: docker compose -f docker-compose.yml -f docker-compose.dev.yml up dev-service

	- name: Generate API documentation
	run: docker exec -d mathesar_service_dev ./manage.py spectacular --color --file schema.yml

	- name: Check if schema file has changed
	run: git diff --quiet schema.yml \|\| exit 0

	- name: Commit schema file
	run: git add schema.yml && git commit -m "Updated schema file"

	- name: Push changes to remote branch
	run: git push origin ${{ github.head_ref }}

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