1 files changed, 42 insertions, 0 deletions
diff --git a/home-manager/xdg-mime.nix b/home-manager/xdg-mime.nix
new file mode 100644
index 0000000..420510f
--- /dev/null
+++ b/home-manager/xdg-mime.nix
@@ -0,0 +1,42 @@
+{ config, lib, pkgs, ... }: let
+	cfg = config.xdg.mimeApps._defaultCategoryApplications;
+
+	# Mime-type category files are stored here
+	mimeResources = ./resources/xdg-mime;
+
+	# Files present in mimeResources with newline separated mime-types
+	# Would be more fun to load these dynamically with builtins.readDir, but I will be disciplined
+	categories = [ "audio" "email" "image" "pdf" "text" "video" ];
+
+	# Dynamically generate categories
+	categoryApplications = (lib.genAttrs categories (category: lib.mkOption {
+		type = lib.types.listOf lib.types.str;
+		default = [ ];
+		description = "set the default application used for ${category} files. omit '.desktop'";
+	}));
+
+	# Create list of mime-types from the category file
+	getCategoryMimeTypes = category: lib.filter (s: s != "") (lib.splitString "\n" (builtins.readFile "${mimeResources}/${category}"));
+
+	# Structure default applications for a specified category how home-manager expects
+	assignMimeTypes = applications: category: lib.map (mimetype:
+		{ "${mimetype}" = lib.mkIf (applications != []) (lib.map (app: "${app}.desktop") applications); }
+	) (getCategoryMimeTypes category);
+
+	# Combine all category applications
+	defaultApplications = lib.mkMerge (lib.flatten (
+		lib.map (category: assignMimeTypes cfg.categoryApplications.${category} category) categories
+	));
+in {
+	options.xdg.mimeApps._defaultCategoryApplications = {
+		enable = lib.mkEnableOption "set default applications as defined in the resources dir";
+		inherit categoryApplications;
+	};
+
+	config = lib.mkIf cfg.enable {
+		xdg.mimeApps = {
+			enable = lib.mkDefault true;
+			inherit defaultApplications;
+		};
+	};
+}