---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# brittany

> Pretty-print Haskell source files.
> More information: <https://github.com/lspitzner/brittany#readme>.

- Format a Haskell source file and print the result to `stdout`:

`brittany {{path/to/file.hs}}`

- Format all Haskell source files in the current directory in-place:

`brittany --write-mode=inplace {{*.hs}}`

- Check whether a Haskell source file needs changes and indicate the result through the program's exit code:

`brittany --check-mode {{path/to/file.hs}}`

- Format a Haskell source file using the specified amount of spaces per indentation level and line length:

`brittany --indent {{4}} --columns {{100}} {{path/to/file.hs}}`

- Format a Haskell source file according to the style defined in the specified configuration file:

`brittany --config-file {{path/to/config.yaml}} {{path/to/file.hs}}`
