Package Amazon Lambda layer and deploy to S3.

.github/workflows/cd.yml

@@ -0,0 +1,32 @@
+name: cd
+on:
+  push:
+    branches: [main] # FIXME
+    tags: ['*.*']
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment: aws
+    env:
+      AWS_BUCKET: ${{ vars.AWS_BUCKET }}
+      AWS_DEFAULT_REGION: ${{ vars.AWS_DEFAULT_REGION }}
+      AWS_ROLE: arn:aws:iam::${{ vars.AWS_ACCOUNT_ID }}:role/GitHubActions
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.9"
+      # https://docs.aws.amazon.com/lambda/latest/dg/python-layers.html#python-layer-packaging
+      - name: Packaging the layer content
+        run: |
+          python -m venv create_layer
+          source create_layer/bin/activate
+          pip install -r requirements.txt
+          mkdir python
+          cp -r create_layer/lib python
+          zip -r layer_content.zip python
+      - uses: aws-actions/configure-aws-credentials@v2
+        with:
+          aws-region: ${{ env.AWS_DEFAULT_REGION }}
+          role-to-assume: ${{ env.AWS_ROLE }}
+      - run: aws s3 cp layer_content.zip s3://${{ env.AWS_BUCKET }}/vtwsclib.zip