File names with spaces causes the project to be recompiled every time

[tomaka]

If you have a code that looks like this:

#[path="test test.rs"]
mod test;

The value src/test test.rs will be added to the dependencies, but will be interpreted as two elements: src/test and test.rs, causing cargo build to recompile the library/binary every time.

[alexcrichton]

I had a feeling this would come up eventually! This is currently a problem with rustc --dep-info in the sense that it doesn't emit a makefile syntax which properly escapes things like spaces (and probably other things as well!). I've opened rust-lang/rust#17627 about this.

To see what I'm talking about:

#[path = "foo foo.rs"]
mod foo;

$ rustc foo.rs --dep-info dep --crate-type lib
$ cat dep
libfoo.rlib: foo.rs foo foo.rs

Now, that being said, cargo itself only splits these dependencies on spaces, so it would also need to be updated!

[tomaka]

That's a shitty solution, but maybe Cargo could try to concat the paths?
For example if the dependencies are src/foo foo.rs, try src/foo and if it doesn't exist try src/foo foo.rs.