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569c94b71b
My editor runs `rustfmt` on save to format Rust code, not `cargo fmt`. With our recent bump to the Rust 2024 edition, the formatting that `rustfmt`/`cargo fmt` applies changed. Unfortunately, `rustfmt` and `cargo fmt` have different behaviors for determining which edition to use when formatting: `cargo fmt` looks for the Rust edition in `Cargo.toml`, whereas `rustfmt` looks for it in `rustfmt.toml`. As a result, whenever I save, I have to remember to manually run `cargo fmt` before committing/pushing. There is an open issue asking for `rustfmt` to also look at `Cargo.toml` when it's present (https://github.com/rust-lang/rust.vim/issues/368), but it seems like they "closed" that issue just by bumping the default edition (six years ago, from 2015 to 2018). In the meantime, this PR adds a `rustfmt.toml` file with our current Rust edition so that both invocation have the same behavior. I don't love that this duplicates information in `Cargo.toml`, but I've added a reminder comment there to hopefully ensure that we bump the edition in both places three years from now.
2 lines
40 B
TOML
2 lines
40 B
TOML
edition = "2024"
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style_edition = "2024"
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