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Site generator

This is a static website generator, that includes support for a blog, with vanity urls, keyword tags, RSS, sitemap.xml.

I reimplemented site-gen-rust which I wrote in Rust to learn Rust, in OCaml to learn OCaml (which is a rewrite from site-gen originally written in Swift). You get the idea.

Note, the Rust and OCaml versions just went further, they're on par feature wise. The site-gen Swift version is out of date, I was still figuring out what this thing should be and how it should work.

How it works

it takes a .settings.json of this format...

{
    "workdir": "/Users/name/Documents/Code/website/public",
    "webroot": "https://website.org",
    "template": "./template/template.html",
    "templateindex": "./template/template-index.html",
    "contenttag": "{{%%content%%}}",
    "titletag": "{{%%title%%}}",
    "descriptiontag" : "{{%%description%%}}",
    "keywordstag": "{{%%keywords%%}}"
}

The site generator will then

  • walk recursively the workdir looking for .md (markdown) files,
  • converts them to HTML
  • insert them in template
  • replacing the contenttag with the HTML
  • update descriptiontag with the contents of <x-desc> (custom valid HTML5 tag in the markdown)
  • same with the keywordstag with the contents of <x-tags> (hidden)
  • same with the titletag with the contents of <x-title>
  • it will do the same with the templateindex if the markdown contains (as an indicator of being the index)

This custom HTML5 tag gymnastic is to avoid having metadata json files around, or breaking the valid markdown format (like Hugo does). In retrospect, I have mixed feelings about it.

NOTE: the content will be placed in situe. So if the website places a markdown in /folder it will be /folder/index.html so that you're in control of the whole website structure and vanity urls.

Blogging

The blogging system works pretty much the same, except I use <x-blog-title> instead of <x-title> to tell the generator that this is a blog post.

Blog posts will automatically have a blog class on the <body> to style the blog differently, as needed.

Additionally we parse sub for the RSS pubDate and to be sorted on the index page.

It will be included in the RSS and linked from the homepage. Note that this last part is pretty much custom to suit my own needs, but could be abstracted out further.

Running

Requirement

opam install core omd ppx_deriving yojson

Debug

make # or dune exec sitegen

Release

make build

See also

  • site-gen-rust a remake of this in Rust
  • site-gen-c a remake of this in modern C

Benchmarks

For fun, I ran some stats. This compares the different builds. Note that all were written pretty naively. So, take those with a grain of salt. However the implementation logic is very linear and very similar...

I am surprised by the speed of the Go implementation considering how quickly I wrote all the code. It certainly was easier than the Rust's or OCaml implementation. Dart felt like the easiest to write in.

The C version could use further optimisations. The most poetic and readable is the OCaml version. The least readable is the Rust version.

Each versions have very minor differences in the output HTML, based on the native markdown library, e.g. some handle ellipsis, some don't, etc.

Method

hyperfine --warmup 5 ./site-gen-go # ran for approx 410 iterations.

C version

Time (mean ± σ): 3.0 ms ± 0.2 ms [User: 1.1 ms, System: 1.8 ms]

Rust version

Time (mean ± σ): 4.3 ms ± 0.2 ms [User: 2.1 ms, System: 2.0 ms]

Go version

Time (mean ± σ): 4.8 ms ± 0.1 ms [User: 2.0 ms, System: 2.8 ms]

OCaml version

Time (mean ± σ): 6.4 ms ± 0.2 ms [User: 3.5 ms, System: 2.8 ms]

OCaml bytecode version

Time (mean ± σ): 21.2 ms ± 0.2 ms [User: 17.6 ms, System: 3.3 ms]

Dart version (master: async)

Time (mean ± σ): 30.8 ms ± 0.6 ms [User: 21.8 ms, System: 8.5 ms]

Dart version (f/sync: sync only)

Time (mean ± σ): 30.0 ms ± 0.5 ms [User: 21.8 ms, System: 8.5 ms]

See also