See github.com/compromyse/compromyse.xyz for an example site.
# REQUIREMENTS: CMake, Git, GCC/Clang, GNUMake/Ninja
$ git clone https://github.com/compromyse/msg
$ mkdir build && cd build
$ cmake ..
$ make # or ninja
$ ./msg -h
msg: The Minimal Static Site Generator
Usage: ./msg [-h] [-w] [-v] [-o <output>] <directory>
        -h         : Help
        -w         : Watch working directory for changes
        -v         : Verbose
        -o <output>: Output directory
        <directory>: Working directory
.
├── assets
│   └── me.webp
├── config.cfg
├── index.html
├── partials
│   ├── footer.html
│   ├── navbar.html
├── projects.html
└── templates
    └── base.html
/partials<!-- index.html -->
<html>
  <body>
    {{ include "navbar.html" }}
    ...
  </body>
</html>
<!-- templates/base.html -->
<html>
  <head>
    {{ content "head" }}
  </head>
  <body>
    {{ body }}
  </body>
</html>
<!-- index.html -->
{{ contentfor "head" }}
<title>HOME</title>
{{ endcontent }}
<p>...</p>
<!-- projects/xyz.html -->
title = XYZ
---
<h1>XYZ!</h1>
<!-- index.html -->
{{ eachdo resources.projects }}
<p>{{ put title }}</p>
{{ endeachdo }}
<!-- projects/xyz.html -->
template = base_tailwind.html
---
<h1 class="p-2">XYZ!</h1>