Docs-like-code is a relatively new term, but the idea behind it has been implemented by the open source community for many years now: Writing documentation using the same systems that are used for writing, reviewing, and deploying code. From using version control systems like Git or Mercurial all the way up to using continuous integration and deployment tools like Jenkins or TravisCI.
This book by Anne Gentle now tries to collect all the best-practices around this method. Due to Anne’s and her co-authors' history with the OpenStack project, most of the examples are based on that project. The book starts with a quick introduction of the topic as a whole and then goes on covering the tool-chain from how to set up repositories all the way to publishing the result using Jekyll, Sphinx, or other tools. There are also large chapters about automated reviews, reviewing in general, and continuous integration/deployment.
Docs-like-code mostly focuses on using Git, Restructured Text and Markdown for the editing part and Github for publishing and collaborating. Sadly, the reasons behind some of these choices and excluding other tools are not really explained explicitly and the book therefore partially feels a bit biased. For instance, AsciiDoc is only mentioned once with the tooling around it not receiving any kind of coverage. Same goes for code hosting solutions other than Github. It feels as if it were the only horse in town, with self hosted products like Gitlab or Bitbucket only receiving only the briefest of mentions.
Other parts of the book might be downright confusing to people new to the method. Sometimes Git and Github are used interchangeably. Chapter 2 starts off with a glossary on Git related terminology without introducing the actual topic of that chapter (“Plan for docs like code”) first. Terms like containers are introduced without properly explaining them. Another time the author did suggest rebasing in a chapter that should help a beginner make their first edits. As rebasing is considered an advanced feature in Git this felt completely out of place. Same as using vi for editing source files where the author went as far as giving key-stroke by key-stroke introductions instead of just telling people to use the text-editor of their choice.
A chapter that I would have expected earlier in the book was one about comparing Wikis to documentation within a code repository. This should IMHO have been part of the first chapter. But even down there were some weird points: The chapter made it sound like you couldn’t automate checks within a Wiki while systems like Confluence are extensible enough to allow for these things. They are not easy, mind you, but usually possible nonetheless.
There are also some technical aspects that are simply wrong. In one chapter the author tries to introduce containers as part of the build tool chain. Good idea, but in the same paragraph “micro services” are mentioned without a real reason and containers are described as something that you need to have multiple of in order to get an actual “service”. There is also a chapter about programming language considerations (since according to the author the primary language in a project kind of dictates what documentation tool-set you should use) where eggs are still described as the primary packaging format in the Python community.
In general, the book, sadly, kind of feels like an alpha version. The copy-editing is thorough but the technical one is spotty at best and painfully lacking in other places. Perhaps lulu.com just gave me an outdated version of the book but the one I got is simply nothing I can recommend. As much as I’d love to have a book about the docs-like-code approach that I can send around the office, this is not the one.
Big thanks to Ulrich for proof-reading 😊