rustfmt

A tool for formatting Rust code according to style guidelines.

Gotchas

• For things you do not want rustfmt to mangle, use

 #[rustfmt_skip]

• When you run rustfmt use a file called rustfmt.toml to override the settings in default.toml
• We create a functioning executable called rustfmt in the target directory

How to build and test

You'll need a pretty up to date version of the nightly version of Rust.

cargo build to build.

cargo test to run all tests.

cargo run -- filename to run on a file, if the file includes out of line modules, then we reformat those too. So to run on a whole module or crate, you just need to run on the top file.

You'll probably want to specify the write mode. Currently, there are the replace, overwrite and display mode. The replace mode is the default and overwrites the original files after renaming them. In overwrite mode, rustfmt does not backup the source files. To print the output to stdout, use the display mode. The write mode can be set by passing the --write-mode flag on the command line.

cargo run -- filename --write-mode=display prints the output of rustfmt to the screen, for example.