Check if the input is well-formatted.

Exits with status code 0 if input is well-formatted. Exits with status code 1 and prints a diff if formatting is not correct.

What kind of output to emit.

• files emits formatted output to files; this is the default

• stdout emits the formatted output to stdout

Backup any modified files.

Before a file is modified, rustfmt will create a copy with the same path, except with .rs extension replaced by .bk. Note that existing .bk files are silently over-written.

Recursively searches the given path for the rustfmt.toml or .rustfmt.toml config file. If not found, it reverts to the default behavior of searching the parent directories of the file to be formatted.

Rust edition to use, which defaults to 2015 edition.

If using a different edition than the default, specify it here, because the formatting may be different.

Use colored output (if supported)

Dumps a default or minimal config to PATH. A minimal config is the subset of the current config file used for formatting the current program. current writes to stdout current config as if formatting the file at PATH.

Short option: -l.

Prints the names of mismatched files that were formatted. When used with --check, this option instead prints the names of files that are not well-formatted.

Set options from command line. These settings take priority over .rustfmt.toml.

Short option: -v.

Print verbose output.

Short option: -q.

Print less output.

Short option: -V.

Show version information.

Short option: -h.

Show this message or help about a specific topic: config or file-lines.