limit push trigger to main branch for updating base python images #51

	name: "Update base Python container images"

	on:
	push:
	branches:
	- 'main'
	schedule:
	- cron: '0 0 * * MON'
	workflow_dispatch:

	jobs:
	task:
	strategy:
	matrix:
	py_version:
	- "3.8"
	- "3.9"
	- "3.10"
	- "3.11"
	- "3.12"

	permissions:
	contents: write
	pull-requests: write
	packages: write

	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Auth to Cloud
	uses: 'uwit-iam/action-auth-artifact-registry@main'
	with:
	credentials: "${{ secrets.MCI_GCLOUD_AUTH_JSON }}"

	- name: Record timestamp for image
	id: timestamp
	run: \|
	echo "value=$(date +%Y.%m.%d.%H.%M.%S)" >> $GITHUB_OUTPUT # e.g., 2024.01.17.15.09.31

	- name: Build and push docker image
	env:
	image_uri: "us-docker.pkg.dev/uwit-mci-iam/containers/base-python-${{ matrix.py_version }}"
	run: \|
	docker build \
	images/python-base/ \
	-f images/python-base/Dockerfile \
	-t "${{ env.image_uri }}:latest" \
	-t "${{ env.image_uri }}:${{ steps.timestamp.outputs.value }}" \
	--build-arg TIMESTAMP="${{ steps.timestamp.outputs.value }}" \
	--build-arg PYTHON_VERSION="${{ matrix.py_version }}"
	docker push --all-tags "${{ env.image_uri }}"

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