Haskell: Difference between revisions

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== How to develop with Haskell and Nix ==

There are multiples ways to develop in Haskell on Nix depending on the simplicity of the project and on whether one want to benefit from the reproducibility offered by nix or not. Below is an image to help you in your choice:

~~[[File:haskell_choice.png]]~~

{{Note|{{nixos:package|haskellPackages}} is a synonym of <code>haskell.packages.ghcXYZ</code> where <code>XYZ</code> is the current default version of GHC in nixpkgs. However you can use a different version by replacing <code>haskellPackages</code> with the wanted package, for instance use <code>haskell.compiler.ghc884</code> to use GHC 8.8.4. You can get the full list of available GHC versions using:

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...

(ghc.withPackages (hsPkgs: with hsPkgs; [

turtle # Faster startup time with all external shell commands

shh # Piping operators and other goodies

... # ...anything else you want!

shh-extras # Try shh as an interactive shell

... # ...anything else you want!

])

];

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 == How to develop with Haskell and Nix ==
-There are multiples ways to develop in Haskell on Nix depending on the simplicity of the project and on whether one want to benefit from the reproducibility offered by nix or not. Below is an image to help you in your choice:
-[[File:haskell_choice.png]]
 {{Note|{{nixos:package|haskellPackages}} is a synonym of <code>haskell.packages.ghcXYZ</code> where <code>XYZ</code> is the current default version of GHC in nixpkgs. However you can use a different version by replacing <code>haskellPackages</code> with the wanted package, for instance use <code>haskell.compiler.ghc884</code> to use GHC 8.8.4. You can get the full list of available GHC versions using:
@@ Line 39: / Line 35: @@
      ...
      (ghc.withPackages (hsPkgs: with hsPkgs; [
-       turtle   # Faster startup time with all external shell commands
+       turtle      # Faster startup time with all external shell commands
-       shh      # Piping operators and other goodies
+       shh         # Piping operators and other goodies
-       ...      # ...anything else you want!
+      shh-extras  # Try shh as an interactive shell
+       ...         # ...anything else you want!
      ])
    ];