My find function has been the single most useful thing to come out of my side project. The first thing I do in my makefiles is get a list of all source files and it's always been annoying because I like organizing my project in trees which requires recursive file system walks. I managed to write a pure GNU Make function that simplifies that to:

  sources := $(call find,src,file?)

I think it would be a nice addition to GMSL. In my project, I doubt it will ever help anyone.

One of these days I'll get it off SourceForge...

Is your find function a bit like my rwildcard? https://news.ycombinator.com/item?id=23270235

I think my function is needlessly complicated compared to rwildcard. Here's my code:

https://github.com/matheusmoreira/liblinux/blob/modular-buil...

https://github.com/matheusmoreira/liblinux/blob/modular-buil...

The file? and directory? functions were inspired by GMSL. I think I learned how to check whether a path is a directory from one of your posts.

I wrote a general recursion function. It takes a function to apply to lists and a function to compute whether an element is a base case.

The recursive file system traversal function applies a directory globbing function to the list of paths and has file? as base case. It returns all files without filtering.

The find function recursively traverses the file system while filtering out all items not matching the given predicate function. It was my intention to provide predicates like c_file? and header_file? but I stopped developing that project before that happened. Users can easily write their own predicates too.

I think rwildcard is probably simpler and more efficient! If my code helps in any way though, feel free to use it.