genref

Config API generator

This is a Config API reference generator that uses the k8s.io/gengo project to parse types and generate API documentation from it.

This tool relies only on the Go source code containing the type definitions. For references to external type definitions, especially those from the k8s.io/kubernetes repo, you can tell the tool to generate links to the existing docs, which can be the GoDocs if no better option exists.

Try it out

1. Clone this repository.

2. Make sure you have go1.15+ installed. Run make to build the genref binary:

   cd genref
   make
   

3. Generate reference doc for some API types.

   ./genref -include kubelet-config -output output/html 
   

4. Visit output/html/kubelet-config.v1beta1.html to view the results.

Customization

Use a different config file

You can use the -c flag to specify a different configuration file for generating the config API references. For example,

./genref -c myconfig.yaml

Specify the package

You can modify the config.yaml file to customize the generated API reference output. You can also use -include and -exclude flags for the genref binary to customize which package to include or exclude respectively. The value for the -include and -exclude flags must be one of the name of the apis listed in the config.yaml file, for example, kubelet-config, kube-scheduler-config.

Specify the output format

The tool can generate HTML pages directly or Markdown files if needed. You can specify the output format using the -f flag. For example,

./genref -f markdown -include kubelet-config

Customize the output template

The tool uses GoLang templates to generate HTML or Markdown. The HTML templates are under the html/ subdirectory. For Markdown, the templates are under the markdown/ subdirectory.

Credit

This project is inspired and largely based on the gen-crd-api-reference-docs tool developed by Ahmet Alp Balkan (@ahmetb).

The tool was reworked for:

• refactored code structure;
• support to YAML config file so we can put comments in it;
• added (and tested) source for parsing Kubernetes unpublished API types;
• allow for parsing across packages which have emerged in many projects;
• use go.mod to manage package version for parsing;
• output styling changes to better align with Kubernetes API reference docs.

TODOs

• Allow user to specify the top level structs.
• Add description to each API
• Mark packages that are used in the website so that they can be treated in a different way than other versions.