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Merge pull request #2 from telostat/vst/revisit-haskell-tools
Make Haskell tools less opinionated
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|---|---|---|
| @@ -1,67 +1,82 @@ | ||
| ## This module provides Haskell development helpers and tools which | ||
| ## are somewhat opinionated. | ||
| ## | ||
| ## In particular, the motivation is (1) to access some Haskell | ||
| ## development tools (such as apply-refact, fourmolu, | ||
| ## haskell-language-server, hlint etc...) in all projects that make | ||
| ## use of telos.nix, and (2) while doing so, to benefit from (at least | ||
| ## local) binary caches to avoid long compilation times for these | ||
| ## tools. | ||
| let | ||
| ## Nix packages override configuration for Haskell development | ||
| ## tools. | ||
| ## Provides a helper function that overrides Haskell packages for | ||
| ## our custom Haskell development tools. | ||
| ## | ||
| ## Usage: | ||
| ## | ||
| ## devpkgs = import <nixpkgs-unstable> { inherit config-dev-hs; }; | ||
| ## devpkgs = import telosnix.pkgs-sources.unstable { inherit config-dev-hs; }; | ||
| ## pkgs.haskellPackages.override { | ||
| ## overrides = overrideHaskellForDevTools; | ||
| ## }; | ||
| overrideHaskellForDevTools = | ||
| new: old: { | ||
| apply-refact = old.apply-refact_0_10_0_0; | ||
| Cabal = old.Cabal_3_6_3_0; | ||
| fourmolu = old.fourmolu_0_8_2_0; | ||
| ghc-lib-parser = old.ghc-lib-parser_9_2_4_20220729; | ||
| }; | ||
|
|
||
| ## Returns the Haskell set for development purposes. | ||
| ## | ||
| ## Note that this is NOT for the package being developed. It can | ||
| ## have its own Nix packages source and configuration. This is | ||
| ## rather for the Haskell tools such as language server, linters, | ||
| ## formatters etc... | ||
| ## In particular, it overrides packages for our custom Haskell | ||
| ## development tools and optional overrides provided. | ||
| ## | ||
| ## The motivation is to: | ||
| ## Usage: | ||
| ## | ||
| ## 1. Use latest Haskell development tools. | ||
| ## 2. Benefit from Nix binary caches. | ||
| ## override-haskell-for-package = new: old: rec { | ||
| ## relude = my-own-relude; | ||
| ## }; | ||
| ## | ||
| ## For the latter, you should be using the same underlying package | ||
| ## sources and GHC. | ||
| config-dev-hs = { | ||
| packageOverrides = pkgs: rec { | ||
| haskellPackages = pkgs.haskellPackages.override { | ||
| overrides = new: old: rec { | ||
| apply-refact = old.apply-refact_0_10_0_0; | ||
| Cabal = old.Cabal_3_6_3_0; | ||
| fourmolu = old.fourmolu_0_8_2_0; | ||
| ghc-lib-parser = old.ghc-lib-parser_9_2_4_20220729; | ||
| hlint = old.hlint_3_5; | ||
| }; | ||
| }; | ||
| }; | ||
| }; | ||
|
|
||
| ## Imports and returns a given Nix packages source with our custom | ||
| ## Nix packages override configuration for Haskell development | ||
| ## tools. | ||
| get-haskell-development-packages = source: | ||
| import source { inherit config-dev-hs; }; | ||
|
|
||
| ## Imports and returns a compiler specific Haskell packages set with | ||
| ## our custom Nix packages override configuration for Haskell | ||
| ## development tools. | ||
| get-haskell-development-compiler = source: compiler: | ||
| (get-haskell-development-packages source).haskell.packages.${compiler}; | ||
|
|
||
| ## Returns common Haskell development tools for the given Nix | ||
| ## packages source with our custom Nix packages override | ||
| ## configuration for Haskell development tools. | ||
| get-haskell-development-tools = source: compiler: | ||
| ## haskell = telosnix.tools.haskell.getHaskell | ||
| ## { | ||
| ## pkgs = my-pkgs; | ||
| ## compiler = my-compiler; | ||
| ## overrides = override-haskell-for-package; | ||
| ## }; | ||
| ## | ||
| ## ghc = haskell.ghcWithPackages (_: my-haskell-package-deps); | ||
| ## | ||
| ## haskell-dev-tools-for-my-shell = with haskell; | ||
| ## [ | ||
| ## ## Our GHC with all packages required to build and test our package: | ||
| ## ghc | ||
| ## | ||
| ## ## Various haskell tools: | ||
| ## apply-refact | ||
| ## cabal-install | ||
| ## cabal2nix | ||
| ## fourmolu | ||
| ## haskell-language-server | ||
| ## hlint | ||
| ## hpack | ||
| ## ]; | ||
| getHaskell = | ||
| { pkgs | ||
| , compiler | ||
| , overrides ? new: old: { } | ||
| }: | ||
| let | ||
| haskell = get-haskell-development-compiler source compiler; | ||
| overrider = new: old: | ||
| let | ||
| withTools = overrideHaskellForDevTools new old; | ||
| requested = overrides new old; | ||
| in | ||
| withTools // requested | ||
| ; | ||
| in | ||
| [ | ||
| haskell.apply-refact | ||
| haskell.fourmolu | ||
| haskell.haskell-language-server | ||
| haskell.hlint | ||
| ]; | ||
| pkgs.haskell.packages.${compiler}.override { | ||
| overrides = overrider; | ||
| }; | ||
| in | ||
| { | ||
| config-dev-hs = config-dev-hs; | ||
| get-haskell-development-packages = get-haskell-development-packages; | ||
| get-haskell-development-compiler = get-haskell-development-compiler; | ||
| get-haskell-development-tools = get-haskell-development-tools; | ||
| overrideHaskellForDevTools = overrideHaskellForDevTools; | ||
| getHaskell = getHaskell; | ||
| } |