danicat/skills/google-oss

Google Open Source Compliance & License Attributions

Audit, apply, and verify Google Open Source policy requirements, source code license headers (addlicense), and mandatory repository disclaimers.

⚡ Quick Reference: Actions & Commands

1. Apply License Headers via addlicense

Install the official Google addlicense tool if not already present:

go install github.com/google/addlicense@latest

Apply Apache-2.0 copyright headers across all source files:

$(go env GOPATH)/bin/addlicense -c "Google LLC" -l apache .

Verify/Check without modifying (CI gate):

$(go env GOPATH)/bin/addlicense -check -c "Google LLC" -l apache .

Common license flag options:

• -l apache: Apache License 2.0 (standard default for Google OSS)
• -l mit: MIT License
• -l bsd: BSD 3-Clause License
• -s=only: Force SPDX short identifier style (// SPDX-License-Identifier: Apache-2.0)
• -ignore "vendor/**": Ignore specific directory globs

2. Mandatory README Disclaimers

Every repository published by Googlers or under Google open source that is not an official Google product MUST include the appropriate disclaimer in the root README.md.

Standard Non-Official Product Disclaimer:

---
 
## Disclaimer
 
This is not an officially supported Google product.

Experimental / Educational Project Disclaimer:

---
 
## Disclaimer
 
This is not an officially supported Google product. It is an experimental project created for educational and development purposes.

📋 Pre-Release Compliance Checklist

Before publishing or tagging any public open-source repository, verify:

1. License Header Coverage:

• Run addlicense -check across all code files (.go, .py, .ts, .js, .rs, .c, .cpp, .sh, .proto).
• Ensure generated files (e.g. *.pb.go) or third-party code in vendor/ or third_party/ are properly ignored or attributed.

1. Root `LICENSE` File:

• Ensure an unmodified copy of the chosen license (e.g. Apache 2.0) exists at the repository root.

1. Non-Official Product Disclaimer:

• Present at the bottom of root README.md.

1. Zero Internal Contamination:

• No internal links, internal issue trackers, intranet shortcuts, corporate credentials, or non-public project codenames.

📚 References & Scripts

• License Header Variations: Full syntax for Apache 2.0, MIT, and BSD across languages.
• Disclaimer Variations: Specific disclaimer templates for samples, tools, and demos.
• Automated Helper Script: Bundled shell script to install addlicense and apply headers.