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GlidingSquirrel is now on NuGet with automatic API documentation!

(This post is a bit late as I'm rather under the weather.)

A while ago, I posted about a HTTP/1.0 server library I'd written in C♯ for a challenge. One thing led to another, and I've now ended up adding support for HTTP/1.1, WebSockets, and more....

While these enhancements have been driven mainly by a certain project of mine that keeps stealing all of my attention, they've been fun to add - and now that I've (finally!) worked out how to package it as a NuGet package, it's available on NuGet for everyone to use, under the Mozilla Public License 2.0!

Caution should be advised though, as I've not thoroughly tested it yet to weed out the slew of bugs and vulnerabilities I'm sure are hiding in there somewhere - it's designed mainly to sit behind a reverse-proxy such as Nginx (not that's it's any excuse, I know!) - and also I don't have a good set of test cases I can check it against (I thought for sure there would be at least one test suite out there for HTTP servers, considering the age of the protocol, but apparently not!).

With that out of the way, specifying dependencies didn't turn out to be that hard, actually. Here's the extra bit I added to the .nuspec file to specify the GlidingSquirrel's dependencies:

<dependencies>
    <dependency id="MimeSharp" version="1.0.0" />
    <dependency id="System.ValueTuple" version="4.4.0" />
</dependencies>

The above goes inside the <metadata> element. If you're curious about what this strange .nuspec file is and it's format, I've blogged about it a while back when I figured out how to package my TeleConsole Client - in which I explain my findings and how you can do it yourself too!

I've still not figured out the strange $version$ and $description$ things that are supposed to reference the appropriate values in the .csproj file (if you know how those work, please leave a comment below, as I'd love to know!) - as it keeps telling me that <description> cannot be empty.....

In addition to packaging it and putting it up on NuGet, I've also taken a look at automatic documentation generation. For a while I've been painstakingly documenting the entire project with intellisense comments for especially this purpose - which I'm glad I started early, as it's been a real pain and taken a rather decent chunk of time to do.

Anyway, with the last of the intellisense comments finished today, I set about generating automatic documentation - which turned out to be a surprisingly difficult thing to achieve.

  • Sandcastle, Microsoft's offering has been helpfully discontinued.
  • Sandcastle Help File Builder, the community open-source fork of Sandcastle, appears to be Windows-only (I use Linux myself).
  • DocFX, Microsoft's new offering, appears to be more of a static site generator that uses your code and a bunch of other things as input, rather than the simple HTML API documentation generator I was after.
  • I found Docxygen to produce an acceptable result out-of-the-box, I discovered that configuring it was not a trivial task - the initial configuration file the init action created was over 100 KiB!

I found a few other options too, but they were either Windows-only, or commercial offerings that I can't justify using for an open-source project.

When I was about to give up the search for the day, I stumbled across this page on generating documentation by the mono project, who just happen to be the ones behind mono, the cross-platform .NET runtime that runs on Linux, macOS, and, of course, Windows. They're also the ones who have built mcs, the C♯ compiler that compliments the mono runtime.

Apparently, they've also built a documentation generation that has the ability to export to HTML. While it's certainly nothing fancy, it does look like you've all the power you need at your fingertips to customise the look and feel by tweaking the XSLT stylesheet it renders with, should you need it.

After a bit of research, I found this pair of commands to build the documentation for me quite nicely:

mdoc update -o docs_xml/ -i GlidingSquirrel.xml GlidingSquirrel.dll
mdoc export-html --out docs/ docs_xml

The first command builds the multi-page XML tree from the XML documentation generated during the build process (make sure the "Generate xml documentation" option is ticked in the project build options!), and the second one transforms that into HTML that you can view in your browser.

With the commands figured out, I set about including it in my build process. Here's what I came up with:

<Target Name="AfterBuild">
    <Message Importance="high" Text="----------[ Building documentation ]----------" />

    <Exec Command="mdoc update -o docs_xml/ -i GlidingSquirrel.xml GlidingSquirrel.dll" WorkingDirectory="$(TargetDir)" IgnoreExitCode="true" />
    <Exec Command="mdoc export-html --out $(SolutionDir)/docs docs_xml" WorkingDirectory="$(TargetDir)" IgnoreExitCode="true" />
</Target>

This outputs the documentation to the docs/ folder in the root of the solution. If you're a bit confused as to how to utilise this in your own project, then perhaps the Untangling MSBuild post I wrote to figure out how MSBuild works can help! You can view the GlidingSquirrel's automatically-generated documentation here. It's nothing fancy (yet), but it certainly does the job. I'll have to look into prettifying it later!

Art by Mythdael