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Refactor: move impl to inner config #63
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fc79ecb
wip
srid 5e64443
finish
srid 70f0d19
finialize
srid 9010b35
shift devShell.enable check to outer config
srid 6b1b26a
changelog, etc.
srid d836242
move main impl to separate file
srid 6d74866
cleanups
srid a154e9e
rm unnecessary abstraction
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| # Definition of the `haskellProjects.${name}` submodule's `config` | ||
| { name, self, config, lib, pkgs, ... }: | ||
| let | ||
| # Like pkgs.runCommand but runs inside nix-shell with a mutable project directory. | ||
| # | ||
| # It currenty respects only the nativeBuildInputs (and no shellHook for | ||
| # instance), which seems sufficient for our purposes. We also set $HOME and | ||
| # make the project root mutable, because those are expected when running | ||
| # something in a project shell (it is indeed the case with HLS). | ||
| runCommandInSimulatedShell = devShell: projectRoot: name: attrs: command: | ||
| pkgs.runCommand name (attrs // { nativeBuildInputs = devShell.nativeBuildInputs; }) | ||
| '' | ||
| # Set pipefail option for safer bash | ||
| set -euo pipefail | ||
|
|
||
| # Copy project root to a mutable area | ||
| # We expect "command" to mutate it. | ||
| export HOME=$TMP | ||
| cp -R ${projectRoot} $HOME/project | ||
| chmod -R a+w $HOME/project | ||
| pushd $HOME/project | ||
|
|
||
| ${command} | ||
| touch $out | ||
| ''; | ||
| in | ||
| { | ||
| outputs = | ||
| let | ||
| projectKey = name; | ||
|
|
||
| localPackagesOverlay = self: _: | ||
| let | ||
| fromSdist = self.buildFromCabalSdist or (builtins.trace "Your version of Nixpkgs does not support hs.buildFromCabalSdist yet." (pkg: pkg)); | ||
| filterSrc = name: src: lib.cleanSourceWith { inherit src name; filter = path: type: true; }; | ||
| in | ||
| lib.mapAttrs | ||
| (name: value: | ||
| let | ||
| # callCabal2nix does not need a filtered source. It will | ||
| # only pick out the cabal and/or hpack file. | ||
| pkgProto = self.callCabal2nix name value.root { }; | ||
| pkgFiltered = pkgs.haskell.lib.overrideSrc pkgProto { | ||
| src = filterSrc name value.root; | ||
| }; | ||
| in | ||
| fromSdist pkgFiltered) | ||
| config.packages; | ||
| finalOverlay = | ||
| lib.composeManyExtensions | ||
| [ | ||
| # The order here matters. | ||
| # | ||
| # User's overrides (cfg.overrides) is applied **last** so | ||
| # as to give them maximum control over the final package | ||
| # set used. | ||
| localPackagesOverlay | ||
| (pkgs.haskell.lib.packageSourceOverrides config.source-overrides) | ||
| config.overrides | ||
| ]; | ||
| finalPackages = config.haskellPackages.extend finalOverlay; | ||
|
|
||
| defaultBuildTools = hp: with hp; { | ||
| inherit | ||
| cabal-install | ||
| haskell-language-server | ||
| ghcid | ||
| hlint; | ||
| }; | ||
| nativeBuildInputs = lib.attrValues (defaultBuildTools finalPackages // config.devShell.tools finalPackages); | ||
| devShell = finalPackages.shellFor { | ||
| inherit nativeBuildInputs; | ||
| packages = p: | ||
| map | ||
| (name: p."${name}") | ||
| (lib.attrNames config.packages); | ||
| withHoogle = true; | ||
| }; | ||
| in | ||
| { | ||
| packages = | ||
| let | ||
| mapKeys = f: attrs: lib.mapAttrs' (n: v: { name = f n; value = v; }) attrs; | ||
| # Prefix package names with the project name (unless | ||
| # project is named `default`) | ||
| dropDefaultPrefix = packageName: | ||
| if projectKey == "default" | ||
| then packageName | ||
| else "${projectKey}-${packageName}"; | ||
| in | ||
| mapKeys dropDefaultPrefix | ||
| (lib.mapAttrs | ||
| (name: _: finalPackages."${name}") | ||
| config.packages); | ||
|
|
||
| devShells."${projectKey}" = devShell; | ||
|
|
||
| checks = lib.filterAttrs (_: v: v != null) { | ||
| "${projectKey}-hls" = | ||
| if config.devShell.hlsCheck.enable then | ||
| runCommandInSimulatedShell | ||
| devShell | ||
| self "${projectKey}-hls-check" | ||
| { } "haskell-language-server" | ||
| else null; | ||
| "${projectKey}-hlint" = | ||
| if config.devShell.hlintCheck.enable then | ||
| runCommandInSimulatedShell | ||
| devShell | ||
| self "${projectKey}-hlint-check" | ||
| { } '' | ||
| hlint ${lib.concatStringsSep " " config.devShell.hlintCheck.dirs} | ||
| '' | ||
| else null; | ||
| }; | ||
| }; | ||
| } |
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@roberth Is there a better way of doing this (instead of the
//, which seems like kind of a hack)?There was a problem hiding this comment.
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Yeah, I think we can use module machinery for this, and we probably want that for those little modules with haskell-flake overrides anyway.
projectSubmodule = submoduleWith { specialArgs = { inherit pkgs self; }; modules = [ ..... ] }.specialArgsshould be fine here, as we don't think we want modules to affect those parameters (not 100% sure aboutpkgs, but that can be improved later if necessary)imports = [ ./haskell-project.nix ];here