But there is one caveat: the only way you can add comments to YAML is to use yaml.Node. Luckily, starting from v3 you can actually add comments to the output YAML. We use the gopkg.in/yaml.v3 library to encode configuration data into YAML. Define all examples using actual data structures to ensure that the results are always in sync with the code.Generate YAML configuration as if it was manually created by hand: with comments, examples and such.Have a single source of truth both for markdown and for YAML comments.
Auto generated doxygen comment blocks generator#
The goals we wanted to achieve in this generator are: So, given the complexity of our configuration file, as well as the general difficulty in finding the proper options, we decided to implement a documentation generator for YAML. The generated documentation makes easier to navigate and understand the code as it may contain all public functions, classes, namespaces, enumerations, side notes and code examples.
Auto generated doxygen comment blocks pdf#
We also have a CLI command, talosctl gen config, that templates out configurations, but it omits fields that are nil by default and does not provide comments on any field. Doxygen is a tool that can generate project documentation in html, pdf or Latex from code comments formatted with Doxygen markup syntax. Thus, they can contain typos or malformatted YAML. But such docs get outdated fast and are subject to human error. The next section presents the various styles supported by doxygen. Another option is to start with the manually defined YAML examples in the Talos documentation. A special comment block is a C or C++ style comment block with some additional markings, so doxygen knows it is a piece of structured text that needs to end up in the generated documentation. You can look into the Go sources to read the YAML tags on various fields, but re-assembling that tree is tedious and error prone. There are lots of nested structures, some of which are optional, so it can be pretty hard to get a grasp of the different YAML variants you can construct.
Talos OS, like Kubernetes, can end up with a pretty complicated configuration file. In Go, however, there is nothing that can generate YAML configs with the comments included. Consider Doxygen, Javadoc, and Pydoc for example. The IDE recognizes comments that use Doxygen syntax and. Tools like this are common for other languages as well. You can add comments to your code to generate documentation for your functions, classes, and methods. Godoc, for example, does a great job building a well structured code reference by parsing Go definitions along with comments. That’s why there are automatic tools that can generate documentation for Go code. Keeping documentation in sync with the code is always a hard task.
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