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Clean up devShell options

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Using a submodule for devShell removes the need to make every option
nullable and the need to check all of them. By using nullOr submodule,
we can tell if the value has been set and have default values for
options.

This also enables enabling a devShell with no options set.
This commit is contained in:
Archit Gupta 2023-12-05 01:27:10 -08:00
parent a4e4a341f2
commit dccabae216
2 changed files with 41 additions and 41 deletions
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75
builtinModules/devShells.nix
View File

@ -4,42 +4,44 @@
{ config, lib, flakelight, ... }:
let
inherit (lib) any attrValues filterAttrs mapAttrs mkDefault mkIf mkMerge
mkOption optionalAttrs;
inherit (lib.types) lazyAttrsOf functionTo lines listOf nullOr package str;
inherit (lib) filterAttrs mapAttrs mkDefault mkIf mkMerge mkOption;
inherit (lib.types) functionTo lazyAttrsOf lines listOf nullOr package str
submodule;
inherit (flakelight) supportedSystem;
inherit (flakelight.types) optFunctionTo packageDef;
in
{
options = {
devShell = {
inputsFrom = mkOption {
type = nullOr
(functionTo (listOf package));
default = null;
};
devShell = mkOption {
default = null;
type = nullOr (submodule {
options = {
inputsFrom = mkOption {
type = functionTo (listOf package);
default = _: [ ];
};
packages = mkOption {
type = nullOr
(functionTo (listOf package));
default = null;
};
packages = mkOption {
type = functionTo (listOf package);
default = _: [ ];
};
shellHook = mkOption {
type = nullOr (optFunctionTo lines);
default = null;
};
shellHook = mkOption {
type = optFunctionTo lines;
default = "";
};
env = mkOption {
type = nullOr
(optFunctionTo (lazyAttrsOf str));
default = null;
};
env = mkOption {
type = optFunctionTo (lazyAttrsOf str);
default = { };
};
stdenv = mkOption {
type = nullOr (functionTo package);
default = null;
};
stdenv = mkOption {
type = functionTo package;
default = pkgs: pkgs.stdenv;
};
};
});
};
devShells = mkOption {
@ -49,23 +51,14 @@ in
};
config = mkMerge [
(mkIf (any (x: x != null) (attrValues config.devShell)) {
devShells.default = mkDefault ({ pkgs, mkShell }: mkShell.override
(if config.devShell.stdenv == null then { }
else { stdenv = config.devShell.stdenv pkgs; })
(
optionalAttrs (config.devShell.env != null)
(config.devShell.env pkgs)
// optionalAttrs (config.devShell.inputsFrom != null) {
(mkIf (config.devShell != null) {
devShells.default = mkDefault ({ pkgs, mkShell }:
mkShell.override { stdenv = config.devShell.stdenv pkgs; }
((config.devShell.env pkgs) // {
inputsFrom = config.devShell.inputsFrom pkgs;
}
// optionalAttrs (config.devShell.packages != null) {
packages = config.devShell.packages pkgs;
}
// optionalAttrs (config.devShell.shellHook != null) {
shellHook = config.devShell.shellHook pkgs;
}
));
}));
})
(mkIf (config.devShells != { }) {

7
tests/default.nix
View File

@ -289,6 +289,13 @@ in
})
(f: lib.isDerivation f.devShells.x86_64-linux.default);
devShell-empty = test
(flakelight ./empty {
disabledModules = [ "builtinFormatters.nix" ];
devShell = { };
})
(f: lib.isDerivation f.devShells.x86_64-linux.default);
devShell-override = test
(flakelight ./empty {
devShells.default = { mkShell }: mkShell { };