X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=README.md;h=9c7a1c4bc341bed77ce3ee362a8eea5d01ad7974;hb=2323cbc2311d2b907b62d5dc58970756bfb3cbc0;hp=cfada1a84f6c9580712abedbbdd82a0137f43451;hpb=6739dbe77df4cbe211c286f31fbdb7bbf2e4265c;p=rust.git diff --git a/README.md b/README.md index cfada1a84f6..9c7a1c4bc34 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,4 @@ -# rustfmt [![Build Status](https://travis-ci.org/rust-lang-nursery/rustfmt.svg)](https://travis-ci.org/rust-lang-nursery/rustfmt) [![Build Status](https://ci.appveyor.com/api/projects/status/github/rust-lang-nursery/rustfmt?svg=true)](https://ci.appveyor.com/project/nrc/rustfmt) [![crates.io](https://img.shields.io/crates/v/rustfmt-nightly.svg)](https://crates.io/crates/rustfmt-nightly) [![Travis Configuration Status](https://img.shields.io/travis/davidalber/rustfmt-travis.svg?label=travis%20example)](https://travis-ci.org/davidalber/rustfmt-travis) +# rustfmt [![Build Status](https://travis-ci.com/rust-lang/rustfmt.svg?branch=master)](https://travis-ci.com/rust-lang/rustfmt) [![Build Status](https://ci.appveyor.com/api/projects/status/github/rust-lang/rustfmt?svg=true)](https://ci.appveyor.com/project/rust-lang-libs/rustfmt) [![crates.io](https://img.shields.io/crates/v/rustfmt-nightly.svg)](https://crates.io/crates/rustfmt-nightly) [![Travis Configuration Status](https://img.shields.io/travis/davidalber/rustfmt-travis.svg?label=travis%20example)](https://travis-ci.org/davidalber/rustfmt-travis) A tool for formatting Rust code according to style guidelines. @@ -15,31 +15,34 @@ the "travis example" badge above. You can run `rustfmt` with Rust 1.24 and above. +### On the Stable toolchain + To install: -``` -rustup component add rustfmt-preview +```sh +rustup component add rustfmt ``` -to run on a cargo project in the current working directory: +To run on a cargo project in the current working directory: -``` +```sh cargo fmt ``` -For the latest and greatest `rustfmt` (nightly required): -``` -rustup component add rustfmt-preview --toolchain nightly -``` -To run: -``` -cargo +nightly fmt +### On the Nightly toolchain + +For the latest and greatest `rustfmt`, nightly is required. + +To install: + +```sh +rustup component add rustfmt --toolchain nightly ``` -To format code that requires edition 2018, create a `rustfmt.toml` [configuration](#configuring-rustfmt) file containing: +To run on a cargo project in the current working directory: -```toml -edition = "2018" +```sh +cargo +nightly fmt ``` ## Limitations @@ -73,15 +76,15 @@ because in the future Rustfmt might work on code where it currently does not): ## Installation -``` -rustup component add rustfmt-preview +```sh +rustup component add rustfmt ``` ## Installing from source To install from source (nightly required), first checkout to the tag or branch you want to install, then issue -``` +```sh cargo install --path . ``` @@ -98,7 +101,7 @@ just need to run on the root file (usually mod.rs or lib.rs). Rustfmt can also read data from stdin. Alternatively, you can use `cargo fmt` to format all binary and library targets of your crate. -You can run `rustfmt --help` for information about argument. +You can run `rustfmt --help` for information about available arguments. When running with `--check`, Rustfmt will exit with `0` if Rustfmt would not make any formatting changes to the input, and `1` if Rustfmt would make changes. @@ -131,11 +134,11 @@ A minimal Travis setup could look like this (requires Rust 1.24.0 or greater): ```yaml language: rust before_script: -- rustup component add rustfmt-preview +- rustup component add rustfmt script: -- cargo fmt --all -- --check - cargo build - cargo test +- cargo fmt --all -- --check ``` See [this blog post](https://medium.com/@ag_dubs/enforcing-style-in-ci-for-rust-projects-18f6b09ec69d) @@ -157,7 +160,7 @@ Rustfmt is designed to be very configurable. You can create a TOML file called `rustfmt.toml` or `.rustfmt.toml`, place it in the project or any other parent directory and it will apply the options in that file. See `rustfmt --help=config` for the options which are available, or if you prefer to see -visual style previews, [Configurations.md](Configurations.md). +visual style previews, [GitHub page](https://rust-lang.github.io/rustfmt/). By default, Rustfmt uses a style which conforms to the [Rust style guide][style guide] that has been formalized through the [style RFC @@ -165,16 +168,32 @@ process][fmt rfcs]. Configuration options are either stable or unstable. Stable options can always be used, while unstable ones are only available on a nightly toolchain, and opt-in. -See [Configurations.md](Configurations.md) for details. +See [GitHub page](https://rust-lang.github.io/rustfmt/) for details. + +### Rust's Editions +Rustfmt is able to pick up the edition used by reading the `Cargo.toml` file if +executed through the Cargo's formatting tool `cargo fmt`. Otherwise, the edition +needs to be specified in `rustfmt.toml`, e.g., with `edition = "2018"`. ## Tips -* For things you do not want rustfmt to mangle, use one of +* For things you do not want rustfmt to mangle, use `#[rustfmt::skip]` +* To prevent rustfmt from formatting a macro or an attribute, + use `#[rustfmt::skip::macros(target_macro_name)]` or + `#[rustfmt::skip::attributes(target_attribute_name)]` + + Example: ```rust - #[rustfmt::skip] // requires nightly Rust and #![feature(tool_attributes)] in crate root - #[cfg_attr(rustfmt, rustfmt_skip)] // works in stable + #![rustfmt::skip::attributes(custom_attribute)] + + #[custom_attribute(formatting , here , should , be , Skipped)] + #[rustfmt::skip::macros(html)] + fn main() { + let macro_result1 = html! {
+ Hello
+ }.to_string(); ``` * When you run rustfmt, place a file named `rustfmt.toml` or `.rustfmt.toml` in target file directory or its parents to override the default settings of @@ -189,7 +208,7 @@ See [Configurations.md](Configurations.md) for details. Example: - ``` + ```sh cargo fmt -- --emit files ``` @@ -201,6 +220,7 @@ See [Configurations.md](Configurations.md) for details. | stdout | writes output to stdout | No | | coverage | displays how much of the input file was processed | Yes | | checkstyle | emits in a checkstyle format | Yes | + | json | emits diffs in a json format | Yes | ## License @@ -210,5 +230,5 @@ Apache License (Version 2.0). See [LICENSE-APACHE](LICENSE-APACHE) and [LICENSE-MIT](LICENSE-MIT) for details. [rust]: https://github.com/rust-lang/rust -[fmt rfcs]: https://github.com/rust-lang-nursery/fmt-rfcs -[style guide]: https://github.com/rust-lang-nursery/fmt-rfcs/blob/master/guide/guide.md +[fmt rfcs]: https://github.com/rust-dev-tools/fmt-rfcs +[style guide]: https://github.com/rust-dev-tools/fmt-rfcs/blob/master/guide/guide.md