This is sort of the suckless approach. Most (all?) of their projects are customized by editing the source and recompiling. From their window manager, dwm:
dwm is customized through editing its source code, which makes it extremely fast and secure - it does not process any input data which isn't known at compile time, except window titles and status text read from the root window's name. You don't have to learn Lua/sh/ruby or some weird configuration file format (like X resource files), beside C, to customize it for your needs: you only have to learn C (at least in order to edit the header file).
dwm is customized through editing its source code, which makes it extremely fast and secure - it does not process any input data which isn't known at compile time, except window titles and status text read from the root window's name. You don't have to learn Lua/sh/ruby or some weird configuration file format (like X resource files), beside C, to customize it for your needs: you only have to learn C (at least in order to edit the header file).
https://dwm.suckless.org/