Allow a wildcard *.rs that can be used to format all .rs file in that directory and it's subdirectories

[ishanjain28]

Sometimes, I want to run rustfmt on all source files in a directory. There is a * wildcard that can be used but it also tries to format toml and any other files in the directory.

I think, There should be a *.rs wildcard that formats all Rust source files in the specified directory and also any rust files in the subdirectories of specified directory.

[ishanjain28]

On a second thought, Formatting all .rs files in a directory and it's subdirectories might cause performance issues and there might be someone who doesn't wants to format all the source files in subdirectories.

So, A -r --recursive flag is probably a good idea.

[ishanjain28]

Oh, Just found out about the --skip-children option. It automatically formats all imported modules in the file. My issue is now resolved but -r --recursive and *.rs wildcard might be useful for someone who has different/unrelated .rs files in a directory.

[nrc]

Rustfmt formats programs rather than files. If you format lib.rs/main.rs, it will format all files in the library/application.

[AlexAegis]

And how about workspaces?
Would be nice to just pass a glob like so:
rustfmt src/**/*.rs