nuScripts: add module

Manage completions, aliases etc. of nu_scripts

modules/modules.nix

@@ -175,6 +175,7 @@ let
     ./programs/noti.nix
     ./programs/notmuch.nix
     ./programs/nushell.nix
+    ./programs/nu-scripts.nix
     ./programs/obs-studio.nix
     ./programs/octant.nix
     ./programs/offlineimap.nix

modules/programs/nu-scripts.nix

@@ -0,0 +1,107 @@
+{ pkgs, lib, config, ... }:
+let
+  inherit (lib) mkIf mkEnableOption mkOption types pipe;
+
+  cfg = config.modules.nushell.nuScripts;
+  scripts = "${pkgs.nu_scripts.outPath}/share/nu_scripts/";
+
+  managedIncludeOption = let
+    filterOption = description:
+      mkOption {
+        inherit description;
+        type = with types; nullOr (listOf str);
+        default = null;
+      };
+  in name: {
+    enable = mkEnableOption ''
+      management of ${name}. 
+
+      If the include and exclude options are both unset all items will be included.
+    '';
+
+    include = filterOption
+      "${name} to include. Matches infix name of directory/file in nu_scripts";
+    exclude = filterOption
+      "${name} to exclude. Matches infix name of directory/file in nu_scripts";
+  };
+
+  pathCompletions = scripts + "custom-completions/";
+  pathCompletionsAuto = pathCompletions + "auto-generate/completions/";
+  pathModules = scripts + "modules/";
+  pathAliases = scripts + "aliases/";
+in {
+  meta.maintainers = [ lib.maintainers."1adept" ];
+
+  options.modules.nushell.nuScripts = {
+    enable = mkEnableOption "script management for nu_script scripts";
+
+    completions = managedIncludeOption "completions";
+    completionsAutoGenerated =
+      managedIncludeOption "auto generated completions";
+    modules = managedIncludeOption "modules";
+    aliases = managedIncludeOption "aliases";
+  };
+
+  config = mkIf (cfg.enable && config.modules.nushell.enable) {
+    # Add nu_scripts
+    home.packages = [ pkgs.nu_scripts ];
+
+    programs.nushell.extraConfig = let
+      getFiles = path:
+        { enable, include ? [ ], exclude ? [ ], ... }:
+        let
+          isNuFile = lib.hasSuffix ".nu";
+
+          # Collect all nu-files in ${path}
+          nuFiles = pipe path [
+            (builtins.readDir)
+            (lib.mapAttrsToList (name: value:
+              if isNuFile name then
+                [ name ]
+              else
+                lib.optional (value == "directory") (pipe (path + "/" + name) [
+                  (builtins.readDir)
+                  (lib.mapAttrs (name2: value2: "${name}/${name2}"))
+                  (lib.attrValues)
+                ])))
+            (lib.flatten)
+            (lib.filter isNuFile)
+          ];
+
+          inList = list: item: lib.any (lib.flip lib.hasInfix item) list;
+
+          selectedFiles = lib.filter (item:
+            (include == null || inList include item)
+            && (exclude == null || !inList exclude item)) nuFiles;
+
+          result = map (name: path + name) selectedFiles;
+        in lib.optionals enable result;
+
+      useFiles = files:
+        pipe files [
+          (map (file: "use ${file} *"))
+          (builtins.concatStringsSep "\n")
+        ];
+
+      completions = useFiles (getFiles pathCompletions cfg.completions);
+      completionsAuto =
+        useFiles (getFiles pathCompletionsAuto cfg.completionsAutoGenerated);
+      aliases = useFiles (getFiles pathAliases cfg.aliases);
+      modules = useFiles (getFiles pathModules cfg.modules);
+
+      # Mk after main config file. This may be necessary for some scripts to be evaluated
+    in lib.mkAfter ''
+      # Generated with home-manager from github:nushell/nu_scripts
+      # Completions --------------------------------------------
+      ${completions}
+      ${completionsAuto}
+      # Modules ------------------------------------------------
+      ${modules}
+      # Aliases ------------------------------------------------
+      ${aliases}
+      # --------------------------------------------------------
+      # Generated END
+    '';
+  };
+}
+