[SOLVED] Is there a stable way to tell Rustfmt to skip an entire file

Is there a stable way to tell Rustfmt to skip an entire file

The official way to get Rustfmt to skip an item is #[rustfmt::skip], however I want it to skip an entire file. I tried this:

#![rustfmt::skip]

However you get this error

error[E0658]: non-builtin inner attributes are unstable

Here is the issue for that error.

Is there a workaround for this? Solutions I am not interested in:

Use unstable Rust
Tell Rustfmt not to process the file using something external to the file (rustfmt.toml for example)

Solution

Currently Rustfmt traverses the mod tree itself so you can put the attribute on the file that declared the module you want to ignore.

#[rustfmt::skip]
mod dont_format_this_file;

Then dont_format_this_file.rs will be skipped.

However, Rustfmt 2 changed its behaviour so that it doesn't traverse the mod tree, so you have to specify dont_format_this_file.rs directly. In that case it seems unlikely that it will find the mod dont_format_this_file; declaration so this may not work when Rustfmt 2 is released.

Edit: Doesn't seem like Rustfmt 2 will ever be released so that's probably not an issue - see this, this.