aj/verify poetry (#447)

* feat: add poetry explicitly, test publish script in sandbox env

* fix: Include py before script

* feat: Ensure poetry is installed before publishing. Ensure CI_COMMIT_TAG present before publishing

ci/input_files/build.yaml.tpl

@@ -9,6 +9,7 @@ stages:
   - virtualenv venv
   - source venv/bin/activate
   - pip install .[dev]
+  - pip install poetry
 
 # This is for serverless framework
 .install-node: &install-node
@@ -167,6 +168,7 @@ publish-pypi-package:
   stage: publish
   tags: ["arch:amd64"]
   image: registry.ddbuild.io/images/docker:20.10-py3
+  before_script: *python-before-script
   cache: []
   rules:
     - if: '$CI_COMMIT_TAG =~ /^v.*/'

ci/publish_pypi.sh

@@ -13,6 +13,14 @@ PYPI_TOKEN=$(aws ssm get-parameter \
     --out text)
 # Builds the lambda layer and upload to Pypi
 
+if [ -z "$CI_COMMIT_TAG" ]; then
+    printf "[Error] No CI_COMMIT_TAG found.\n"
+    printf "Exiting script...\n"
+    exit 1
+else
+    printf "Tag found in environment: $CI_COMMIT_TAG\n"
+fi
+
 # Clear previously built distributions
 if [ -d "dist" ]; then
     echo "Removing folder 'dist' to clear previously built distributions"