How to configure rustfmt

[imding]

Hi, I am trying out Zed and was wondering if I could configure rustfmt when using cmd + shift + i.

[JosephTLyons]

I don't think we currently have a way to associate commands with a given key binding, but I've heard others mentiong wanting this, so we might want to convert this into a feature request.

[johnm]

Hm... Is there some reason Zed's format on save is not respecting the rustfmt.toml file in a Rust project directory?

[marcospb19-cw]

Bumping, any workaround for the formatter to respect rustfmt.toml?
Or any open issues for it?

[UnknownSuperficialNight]

Bumping, any updates on this?

[marcospb19-cw]

For me, the problem was that zed wasn't running rustfmt in nightly.

I solved it with the suggestion at #4491 (comment):

"lsp": {
  "rust-analyzer": {
    "initialization_options": {
      "rustfmt": {
        "extraArgs": ["+nightly"]
      }
    }
  }
}

I thought I had to configure in Zed, but it's reading fine from rustfmt.toml.

So, I guess the answer is: just edit the rustfmt.toml like usual.

[imding]

are you saying Zed is respecting your rustfmt.toml by default except when you're running nightly version of Zed?

for me, I'm not running nightly version of Zed and it still doesn't respect rustfmt.toml

[marcospb19-cw]

No, I'm not running nightly version of Zed, instead, my rustfmt.toml file had some settings that require nightly.

for me, I'm not running nightly version of Zed and it still doesn't respect rustfmt.toml

Can you provide a small project example where cargo fmt respects rustfmt.toml but when formatting in Zed, it (Rust-Analyzer) doesn't?

With that we'd be able to create an issue.

[imding]

oh I understand now, it turns out the options in my .rustfmt.toml are unstable.

[ekakshjanweja]

hey, i am new to rust,
i am using the standard version of rustfmt, how do I get format on save to work, I am not using the nightly version of the fmt

[imding]

my solution was to follow the rustfmt repo instruction.

you may get

error: toolchain 'nightly-...' is not installed

in which case, run rustup toolchain install nightly-... then run cargo +nightly fmt from project root to test that it works.

then you can add the

"lsp": {
  "rust-analyzer": {
    "initialization_options": {
      "rustfmt": {
        "extraArgs": ["+nightly"]
      }
    }
  }
}

settings to Zed.