rustfmt.toml

Put this file at your repository root and run cargo +nightly fmt. Stable rustfmt applies max_width and skips the three nightly-only options with a warning.

Download rustfmt.toml

rustfmt.toml

# Formatting options named by the Google Rust style guide.
# https://google.github.io/styleguide/rustguide.html#use-the-appropriate-formatting-tool

max_width = 100

# The options below are unstable. Stable rustfmt prints a warning and skips them,
# so run `cargo +nightly fmt` to apply the full configuration.
hex_literal_case = "Lower"
format_macro_matchers = true

# One `use` statement per module, with no nested `::` inside `{..}`.
# https://google.github.io/styleguide/rustguide.html#a-use-statement-should-import-items-from-one-module
imports_granularity = "Module"

Source: rustfmt.toml on GitHub. New to the kit? Start with the quick start.