ci(python): improve pypi package availability check (#14)

.github/workflows/image.yaml

@@ -62,16 +62,17 @@ jobs:
       - name: Wait for package availability
         if: ${{ github.event_name == 'push' }}
         run: |
-          bash -c '
+          bash -xc '
           try=10
           while [ "$try" -gt 0 ]; do
             sleep 5
-            curl https://${{ github.ref_type != 'tag' && 'test.' || '' }}pypi.org/simple/greenbids-tailor/ | grep -q greenbids_tailor-${{ inputs.app-version }} && exit 0
+            url="$(curl https://${{ github.ref_type != 'tag' && 'test.' || '' }}pypi.org/simple/greenbids-tailor/ | grep greenbids_tailor-${{ inputs.app-version }} | sed -Ee 's/.*href="([^"]+)".*/\1/')"
+            if [ "$url" ]; then
+              curl -I "$url" | grep -q -E '^HTTP.*200' && exit 0
             try=$(( try - 1 ))
           done
           exit 1
           '
-          sleep 5
 
       - name: Build and push Docker image
         id: push