wrapper-manager/programs/blender: init

Prototyping custom wrapper-manager-fds modules, hoorah!

modules/wrapper-manager/default.nix

@@ -0,0 +1,5 @@
+{
+  imports = [
+    ./programs/blender.nix
+  ];
+}

modules/wrapper-manager/programs/blender.nix

@@ -0,0 +1,63 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.programs.blender;
+
+  blenderVersion = lib.versions.majorMinor cfg.package.version;
+  addons =
+    pkgs.runCommand "blender-system-resources"
+      {
+        passAsFile = [ "paths" ];
+        paths = cfg.addons ++ [ cfg.package ];
+        nativeBuildInputs = with pkgs; [ outils ];
+      } ''
+      mkdir -p $out
+      for i in $(cat $pathsPath); do
+        resourcesPath="$i/share/blender"
+        if [ -d $i/share/blender/${blenderVersion} ]; then
+          resourcesPath="$i/share/blender/${blenderVersion}";
+        fi
+        lndir -silent $resourcesPath $out
+      done
+    '';
+in
+{
+  options.programs.blender = {
+    enable = lib.mkEnableOption "Blender, a 3D computer graphics tool";
+
+    package = lib.mkPackageOption pkgs "blender" {
+      example = ''
+        pkgs.blender-with-packages {
+          name = "sample-studio-wrapped";
+          packages = with pkgs.python3Packages; [ pandas ];
+        }
+      '';
+    };
+
+    addons = lib.mkOption {
+      type = with lib.types; listOf package;
+      description = lib.mdDoc ''
+        List of packages providing Blender system resources at
+        {file}`/share/blender` or at {file}`/share/blender/$MAJORMINORVERSION`.
+      '';
+      default = [ ];
+      defaultText = "[]";
+      example = lib.literalExpression ''
+        with pkgs; [
+          blender-addons-machin3tools
+          blender-addons-glslTexture
+        ]
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    basePackages = [ cfg.package ];
+
+    # TODO: Should we replace the .desktop file for this?
+    wrappers.blender = {
+      arg0 = lib.getExe' cfg.package "blender";
+      env.BLENDER_SYSTEM_RESOURCES = lib.mkIf (builtins.length cfg.addons > 0) addons;
+    };
+  };
+}