X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=README.md;h=6604725ba76cf6d7430cadf0731a4002c3b4a43e;hb=18c42f1ab428ab5bd6f5d43631d6396f0c09d627;hp=07fee7b226bf207b9b6861b1617eb2ca28ffee91;hpb=3c36cfbeea08a0b2987f9a5921d3f78c8ea19e3f;p=rust.git diff --git a/README.md b/README.md index 07fee7b226b..6604725ba76 100644 --- a/README.md +++ b/README.md @@ -1,14 +1,14 @@ -# 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/api/projects/status/github/rust-lang-nursery/rustfmt) +# 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) A tool for formatting Rust code according to style guidelines. If you'd like to help out (and you should, it's a fun project!), see [Contributing.md](Contributing.md). -We are changing the default style used by rustfmt. There is an ongoing [RFC process](https://github.com/rust-lang-nursery/fmt-rfcs). -The last version using the old style was 0.8.6. From 0.9 onwards, the RFC style -is the default. If you want the old style back, you can use [legacy-rustfmt.toml](legacy-rustfmt.toml) -as your rustfmt.toml. +We are changing the default style used by rustfmt. There is an ongoing [RFC +process][fmt rfcs]. The last version using the old style was 0.8.6. From 0.9 +onwards, the RFC style is the default. If you want the old style back, you can +use [legacy-rustfmt.toml](legacy-rustfmt.toml) as your rustfmt.toml. The current `master` branch uses libsyntax (part of the compiler). It is published as `rustfmt-nightly`. The `syntex` branch uses Syntex instead of @@ -21,7 +21,7 @@ to be a bit out of date). Version 0.1 of rustfmt-nightly is forked from version ## Quick start -You must be using a nightly compiler toolchain. +You must be using the latest nightly compiler toolchain. To install: @@ -44,6 +44,7 @@ cargo install rustfmt-nightly or if you're using [Rustup](https://www.rustup.rs/) ``` +rustup update rustup run nightly cargo install rustfmt-nightly ``` @@ -89,11 +90,12 @@ read data from stdin. Alternatively, you can use `cargo fmt` to format all binary and library targets of your crate. You'll probably want to specify the write mode. Currently, there are modes for -diff, replace, overwrite, display, coverage, and checkstyle. +`diff`, `replace`, `overwrite`, `display`, `coverage`, `checkstyle`, and `plain`. -* `replace` Is the default and overwrites the original files after creating backups of the files. -* `overwrite` Overwrites the original files _without_ creating backups. +* `overwrite` Is the default and overwrites the original files _without_ creating backups. +* `replace` Overwrites the original files after creating backups of the files. * `display` Will print the formatted files to stdout. +* `plain` Also writes to stdout, but with no metadata. * `diff` Will print a diff between the original files and formatted files to stdout. Will also exit with an error code if there are any differences. * `checkstyle` Will output the lines that need to be corrected as a checkstyle XML file, @@ -102,7 +104,7 @@ diff, replace, overwrite, display, coverage, and checkstyle. The write mode can be set by passing the `--write-mode` flag on the command line. For example `rustfmt --write-mode=display src/filename.rs` -`cargo fmt` uses `--write-mode=replace` by default. +`cargo fmt` uses `--write-mode=overwrite` by default. If you want to restrict reformatting to specific sets of lines, you can use the `--file-lines` option. Its argument is a JSON array of objects @@ -126,7 +128,7 @@ are included as out of line modules from `src/lib.rs`. If `rustfmt` successfully reformatted the code it will exit with `0` exit status. Exit status `1` signals some unexpected error, like an unknown option or a failure to read a file. Exit status `2` is returned if there are syntax errors -in the input files. `rustfmt` can't format syntatically invalid code. Finally, +in the input files. `rustfmt` can't format syntactically invalid code. Finally, exit status `3` is returned if there are some issues which can't be resolved automatically. For example, if you have a very long comment line `rustfmt` doesn't split it. Instead it prints a warning and exits with `3`. @@ -160,7 +162,7 @@ language: rust cache: cargo before_script: - export PATH="$PATH:$HOME/.cargo/bin" -- which rustfmt || cargo install rustfmt +- which rustfmt || cargo install rustfmt-nightly script: - cargo fmt -- --write-mode=diff - cargo build @@ -187,16 +189,13 @@ directory and it will apply the options in that file. See `rustfmt --config-help` for the options which are available, or if you prefer to see visual style previews, [Configurations.md](Configurations.md). -By default, Rustfmt uses a style which (mostly) conforms to the -[Rust style guidelines](https://doc.rust-lang.org/1.12.0/style/README.html). -There are many details which the style guidelines do not cover, and in these -cases we try to adhere to a style similar to that used in the -[Rust repo](https://github.com/rust-lang/rust). Once Rustfmt is more complete, and -able to re-format large repositories like Rust, we intend to go through the Rust -RFC process to nail down the default style in detail. +By default, Rustfmt uses a style which conforms to the [Rust style guide][style +guide] that has been formalized through the [style RFC +process][fmt rfcs]. -If there are styling choices you don't agree with, we are usually happy to add -options covering different styles. File an issue, or even better, submit a PR. +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. ## Tips @@ -209,12 +208,35 @@ options covering different styles. File an issue, or even better, submit a PR. ``` * 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 - rustfmt. + rustfmt. You can generate a file containing the default configuration with + `rustfmt --dump-default-config rustfmt.toml` and customize as needed. * After successful compilation, a `rustfmt` executable can be found in the target directory. * If you're having issues compiling Rustfmt (or compile errors when trying to install), make sure you have the most recent version of Rust installed. +* If you get an error like `error while loading shared libraries` while starting + up rustfmt you should try the following: + +On Linux: + +``` +export LD_LIBRARY_PATH=$(rustc --print sysroot)/lib:$LD_LIBRARY_PATH +``` + +On MacOS: + +``` +export DYLD_LIBRARY_PATH=$(rustc --print sysroot)/lib:$DYLD_LIBRARY_PATH +``` + +On Windows (Git Bash/Mingw): + +``` +export PATH=$(rustc --print sysroot)/lib/rustlib/x86_64-pc-windows-gnu/lib/:$PATH +``` + +(Substitute `x86_64` by `i686` and `gnu` by `msvc` depending on which version of rustc was used to install rustfmt). ## License @@ -222,3 +244,7 @@ Rustfmt is distributed under the terms of both the MIT license and the 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