make tidy could detect empty files

[huonw]

e.g. #18438.

[iKevinY]

I was looking to implement this, but I noticed that compiler-lookup-paths/native.c appears to be intentionally empty. What categories of file should be included/excluded from this check?

[steveklabnik]

Triage: i am not aware of any changes here. The file @iKevinY mentions is still empty.

[Mark-Simulacrum]

File that is mentioned isn't empty. I think that this should be a relatively easy thing to implement. In src/tools/tidy/src/style.rs, a check that contents are not empty should be added here. The tidy_error macro can be used to print out the problem. At that point, you'll need to run the tidy script (./x.py test src/tools/tidy), and open a PR listing any new errors uncovered by this.

Please let us know if you plan to work on this by leaving a comment here. If you need any help, please ping me in this issue or on IRC (#rust-internals on irc.mozilla.org, name is simulacrum).

[iKevinY]

I should be able to pick up this issue again.

[iKevinY]

@Mark-Simulacrum I think this can be closed now that #41935 has been merged.