Replaced files not being noticed by Cargo

[lesleyrs]

I noticed with replacing the asset txt files you don't need to use cargo clean if you just save it after replace. Then I noticed that if you save the replacing file after using git checkout . to reset local changes, cargo run will actually pick it up. So I believe this isn't related to include_dir but Cargo itself specific to Windows?

rust-lang/cargo#9598 (comment)

I think Windows copy preserves the timestamp (whereas unix doesn't do that by default), so if you copy a file in with an older timestamp, it won't rebuild.

It mentions this issue tracking it rust-lang/cargo#6529

I'm a little confused how include_dir works though, it has a metadata feature that doesn't seem to be used? So is it only used for embedding files now?

[lesleyrs]

Just got around to trying it on linux and it happens here too, so it's not about Windows. However after git checkout . you don't need to save on linux so it works a bit differently but otherwise same problem.