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CONTRIBUTING.md

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Contributing guide

API changes

All API changes should follow the style guide.

API changes are regular PRs in https://github.com/envoyproxy/envoy for the API/configuration changes. They may be as part of a larger implementation PR. Please follow the standard Bazel and CI process for validating build/test sanity of api/ before submitting a PR.

Note: New .proto files should be added to BUILD in order to get the RSTs generated.

Documentation changes

The Envoy project takes documentation seriously. We view it as one of the reasons the project has seen rapid adoption. As such, it is required that all features have complete documentation. This is generally going to be a combination of API documentation as well as architecture/overview documentation.

Building documentation locally

The documentation can be built locally in the root of https://github.com/envoyproxy/envoy via:

docs/build.sh

Or to use a hermetic Docker container:

./ci/run_envoy_docker.sh './ci/do_ci.sh docs'

This process builds RST documentation directly from the proto files, merges it with the static RST files, and then runs Sphinx over the entire tree to produce the final documentation. The generated RST files are not committed as they are regenerated every time the documentation is built.

Viewing documentation

Once the documentation is built, it is available rooted at generated/docs/index.html. The generated RST files are also viewable in generated/rst.

Note also that the generated documentation can be viewed in CI:

  1. Open docs job in CircleCI.
  2. Navigate to "artifacts" tab.
  3. Expand files and click on index.html.

If you do not see an artifacts tab this is a bug in CircleCI. Try logging out and logging back in.

Documentation guidelines

The following are some general guidelines around documentation.

  • Cross link as much as possible. Sphinx is fantastic at this. Use it! See ample examples with the existing documentation as a guide.

  • Please use a single space after a period in documentation so that all generated text is consistent.

  • Comments can be left inside comments if needed (that's pretty deep, right?) via the [#comment:] special tag. E.g.,

    // This is a really cool field!
    // [#comment:TODO(mattklein123): Do something cooler]
    string foo_field = 3;
    
  • Prefer italics for emphasis as backtick emphasis is somewhat jarring in our Sphinx theme.

  • All documentation is expected to use proper English grammar with proper punctuation. If you are not a fluent English speaker please let us know and we will help out.