Rollup merge of #75844 - ehuss:publish-toolstate-httperror, r=Mark-Simulacrum

publish-toolstate: show more context on HTTP error

The default display for HTTPError in Python does not include the request body. For GitHub API, the body includes more details about the error (like rate limiting). This could help diagnosing errors like this: https://github.com/rust-lang/rust/pull/75815#issuecomment-678798158

src/tools/publish_toolstate.py

@@ -275,7 +275,7 @@ def update_latest(
         return message
 
 
-if __name__ == '__main__':
+def main():
     repo = os.environ.get('TOOLSTATE_VALIDATE_MAINTAINERS_REPO')
     if repo:
         github_token = os.environ.get('TOOLSTATE_REPO_ACCESS_TOKEN')
@@ -342,3 +342,11 @@ if __name__ == '__main__':
         }
     ))
     response.read()
+
+
+if __name__ == '__main__':
+    try:
+        main()
+    except urllib2.HTTPError as e:
+        print("HTTPError: %s\n%s" % (e, e.read()))
+        raise