snippetbashTip

hlint — Suggest improvements to Haskell code. More information: <https://hackage.haskell.org/package/hlint>.

Submitted by: @import:tldr-pages·Mar 2, 2026·

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linux

Problem

How to use the hlint command: Suggest improvements to Haskell code. More information: <https://hackage.haskell.org/package/hlint>.

Solution

hlint — Suggest improvements to Haskell code. More information: <https://hackage.haskell.org/package/hlint>.

Display suggestions for a given file:

hlint {{path/to/file}} options

Check all Haskell files and generate a report:

hlint {{path/to/directory}} {{[-r|--report]}}

Automatically apply most suggestions:

hlint {{path/to/file}} --refactor

Display additional options:

hlint {{path/to/file}} --refactor-options

Generate a settings file ignoring all outstanding hints:

hlint {{path/to/file}} --default > {{.hlint.yaml}}

Code Snippets

Display suggestions for a given file

hlint {{path/to/file}} options

Check all Haskell files and generate a report

hlint {{path/to/directory}} {{[-r|--report]}}

Automatically apply most suggestions

hlint {{path/to/file}} --refactor

Display additional options

hlint {{path/to/file}} --refactor-options

Generate a settings file ignoring all outstanding hints

hlint {{path/to/file}} --default > {{.hlint.yaml}}

Context

tldr-pages: linux/hlint

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