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tldr/pages/common/ghcid.md
Sohang Chopra b2a69f45f9
ghcid: add page (#14611)
Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>
2024-11-05 07:20:05 +01:00

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# ghcid
> Simple and efficient CLI IDE for Haskell that reloads code on file changes.
> Continuously displays compile errors, warnings, and test results.
> More information: <https://github.com/ndmitchell/ghcid>.
- Start `ghcid` and monitor a Haskell file for changes:
`ghcid {{path/to/Main.hs}}`
- Start `ghcid` with a specific command, such as loading a Stack or Cabal project:
`ghcid --command "{{stack ghci Main.hs}}"`
- Run an action (default `main`) on each file save:
`ghcid --run={{action}} {{path/to/Main.hs}}`
- Set maximum height and width (default to console height and width):
`ghcid --height={{height}} --width={{width}} {{path/to/Main.hs}}`
- Write full GHC compiler output to a file:
`ghcid --outputfile={{path/to/output_file.txt}} {{path/to/Main.hs}}`
- Execute REPL commands (eg. `-- $> 1+1`) on each file save:
`ghcid --allow-eval {{path/to/Main.hs}}`