rust fmt

VS Code extension for formatting Rust code with rustfmt.

Supports:

File formatting (including format on save)
Workspace formatting (cargo fmt-optimized)
Git-aware formatting (changed / staged Rust files)
Status bar + Control Center quick actions
Native macro_rules! body formatting (opt-in)

Requirements

rustup component add rustfmt

Works on Linux, Windows, macOS.

Settings

Setting	Default	Description
`rustfmt.path`	`"rustfmt"`	Path to rustfmt executable
`rustfmt.extraArgs`	`[]`	Additional rustfmt arguments
`rustfmt.onboarding.mode`	`"quiet"`	Onboarding mode (`quiet` / `guided`)
`nativeMacroFormatter.native`	`false`	Enable `macro_rules!` body formatting
`nativeMacroFormatter.path`	auto	Path to `rust-fmt-mf` binary

Set as default formatter in settings.json:

"[rust]": {
    "editor.defaultFormatter": "vremyavnikuda.rust-fmt",
    "editor.formatOnSave": true
}

Commands

Command	Description
Format Document with rustfmt	Current file (on save)
Format Workspace with rustfmt	All Rust files in workspace
Format Changed Rust Files	Files from `git diff`
Format Staged Rust Files	Files from `git diff --cached`
Open Control Center	Quick action menu
Open Logs	Output channel

How it works

Runs rustfmt --emit stdout with auto-detected crate root, edition, and config. When nativeMacroFormatter.native is enabled, formats macro_rules! bodies via rust-fmt-mf (skipped by standard rustfmt).

Also detects rust-toolchain and rustfmt.toml, skips files over 2 MB.

Troubleshooting

rustfmt not found: run rustup component add rustfmt or set rustfmt.path.