How to Fix 'google/api/annotations.proto' Dependency Issues with Google Protobuf?

Troubleshooting Dependency Issue with "google/api/annotations.proto"

When attempting to generate a gRPC gateway as per the official documentation, you may encounter an error involving the absence or corruption of the "google/api/annotations.proto" dependency. The documentation vaguely mentions the need for third-party protobuf files but fails to provide explicit instructions on how to add them.

Solution:

To resolve this issue, you can manually add a dependency to "google/api/annotations.proto" by copying the file into your project directory.

1. Locate the File:

   • Navigate to the GitHub repository for Google's protobuf library: https://github.com/protocolbuffers/protobuf

2. Copy and Paste:

   • Under the "third_party" directory in the repository, locate the "google/api/annotations.proto" file.
   • Copy the contents of this file and create a new file named "google/api/annotations.proto" in the root of your project directory.

This approach, while seemingly unconventional, is reportedly endorsed by Google developers. It allows you to include the required dependency without modifying your project's build tools or package management system.

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