To recap, to write suru I had to:
Write a parser in a Parser Expression Grammer to parse taskfiles.
Generate a build graph listing the dependency roots and their dependents.
Execute the build graph in a multithreaded manner.
All in all, writing Suru only took 4 days of work, and only a couple hundred of lines of code. I enjoyed how Rust combines bits of C++ and Haskell into a cohesive language that offers the elegance of Haskell and the versatility of C++.
My favorite bit about rust was flattening nested loops using iterator filters and maps. It’s very similar to the C++ Ranges library, just with a different syntax.
I didn’t include writing the commandline argument parser or a loading bar for suru, mostly because it wasn’t very interesting.