nixBufferBuilders: Add haskellMonoRepo builder
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@ -3,7 +3,7 @@
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{ lib, writeText, inherit-local }:
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{
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rec {
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withPackages = pkgs: let
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extras = map (x: x.emacsBufferSetup pkgs) (builtins.filter (builtins.hasAttr "emacsBufferSetup") pkgs);
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in writeText "dir-locals.el" ''
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@ -49,4 +49,28 @@
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${lib.concatStringsSep "\n" extras}
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'';
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# nix-buffer function for a project with a bunch of haskell packages
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# in one directory
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haskellMonoRepo = { project-root # The monorepo root
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, haskellPackages # The composed haskell packages set that contains all of the packages
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}: { root }:
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let # The haskell paths.
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haskell-paths = lib.filesystem.haskellPathsInDir project-root;
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# Find the haskell package that the 'root' is in, if any.
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haskell-path-parent =
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let filtered = builtins.filter (name:
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lib.hasPrefix (toString (project-root + "/${name}")) (toString root)
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) (builtins.attrNames haskell-paths);
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in
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if filtered == [] then null else builtins.head filtered;
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# We're in the directory of a haskell package
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is-haskell-package = haskell-path-parent != null;
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haskell-package = haskellPackages.${haskell-path-parent};
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# GHC environment with all needed deps for the haskell package
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haskell-package-env =
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builtins.head haskell-package.env.nativeBuildInputs;
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in
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if is-haskell-package
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then withPackages [ haskell-package-env ]
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else {};
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}
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