Struct Config 

#[non_exhaustive]
pub struct Config {
    pub manifest_path: Option<PathBuf>,
    pub packages: Vec<String>,
    pub all: bool,
    pub check: bool,
    pub workers: Option<usize>,
    pub channel_capacity: Option<usize>,
    pub rustfmt_args: Vec<String>,
    pub batch_size: Option<usize>,
    pub experimental_cache: bool,
    pub warnings: bool,
}

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

manifest_path: Option<PathBuf>

packages: Vec<String>

all: bool

Format every workspace member, regardless of manifest_path’s implicit package selection. Mirrors cargo fmt --all.

check: bool

workers: Option<usize>

channel_capacity: Option<usize>

rustfmt_args: Vec<String>

batch_size: Option<usize>

Crates per rustfmt invocation. Higher values amortize spawn cost (~40ms/invocation on M-series) at the cost of coarser scheduling granularity. None → 3 (the curve is flat across bs=12-48 thanks to the priority queue, so a small default keeps tiny workspaces from collapsing into one batch).

experimental_cache: bool

Experimental: skip rustfmt for crates whose *.rs file mtimes match the prior successful run. After a write that actually rewrote files, the next run will miss (mtimes shifted) and re-dispatch — correct, just one wasted invocation. See cache.rs for soundness caveats.

warnings: bool

Emit advisory warnings to stderr (cross-crate file claims, stable-rustfmt-on-PATH). Off by default — these are silent in stock cargo fmt too, and the noise isn’t worth it for most users.

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Config

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Config

fn default() -> Config

Returns the “default value” for a type.