chore(python): push cloud library docs to staging bucket for Cloud RAD (#1262)

Author: parthea

synthtool/gcp/common.py

@@ -262,6 +262,10 @@ def py_library(self, **kwargs) -> Path:
         if Path("docs/UPGRADING.md").exists():
             kwargs["include_uprading_doc"] = True
 
+        # If the directory `google/cloud` exists, add kwargs to signal that the client library is for a Cloud API
+        if Path("google/cloud").exists():
+            kwargs["is_google_cloud_api"] = True
+
         # Assume the python-docs-samples Dockerfile is used for samples by default
         if "custom_samples_dockerfile" not in kwargs:
             kwargs["custom_samples_dockerfile"] = False

synthtool/gcp/templates/python_library/.kokoro/docs/common.cfg

@@ -30,7 +30,14 @@ env_vars: {
 
 env_vars: {
     key: "V2_STAGING_BUCKET"
+{%- if is_google_cloud_api %}
+    # Push google cloud library docs to the Cloud RAD bucket `docs-staging-v2`
     value: "docs-staging-v2"
+{% else %}
+    # Push non-cloud library docs to `docs-staging-v2-staging` instead of the
+    # Cloud RAD bucket `docs-staging-v2`
+    value: "docs-staging-v2-staging"
+{% endif -%}
 }
 
 # It will upload the docker image after successful builds.