Okay, it's not zero dependency, but it does only need a C99 compiler and some way to run a command. (C11 preferred, though.)
Anyway, after more than three years of work, Rig is finally ready because it can build itself on non-Windows platforms. (Windows support only needs to figure out how to access the compiler.)
Rig's website: https://rigbuild.dev/
That website has the docs as well, but for anyone who can contact me [1], feel free to do so if the docs are not sufficient for how you want to try it; I will do my best to make Rig work for you as quickly as I can.
FAQ: https://rigbuild.dev/rig-faq/
The FAQ will answer the questions I already thought of, including a lot of license questions, because Rig is not FOSS, but SAMS [2]. If I refer to Rig as FOSS somewhere, I'm sorry; it's historical accident. Tell me, and I'll fix it.
Note that while Rig is a commercial project, everyone, including any company, is free to try it for 30 days, and as long as companies meet the criteria for contacting me, I am open to helping them with Rig for free for 30 days.
Also included with Rig is Yao, a language that could be used to replace bash scripts with less bugs.
[1]: https://yzena.com/contact/
[2]: https://gavinhoward.com/2023/12/is-source-available-really-t...