Set up xdg thing, now for the loader modification nyaa ^.^

Scripts/XDGDataPaths.gd

@@ -9,6 +9,9 @@ const default_xdg_data_dirs := ["/usr/local/share", "/usr/share"]
 
 const config_subdir_name := "pixelorama"
 
+const palettes_data_subdirectory := "Palettes"
+const brushes_data_subdirectory := "Brushes"
+
 # Declare member variables here. Examples:
 # var a = 2
 # var b = "text"
@@ -17,11 +20,73 @@ const config_subdir_name := "pixelorama"
 # Called when the node enters the scene tree for the first time.
 func _ready():
 	if OS.has_feature("X11"):
-		xdg_data_home = OS.get_environment("HOME").plus_file(default_xdg_data_home_rel)
+		var home := OS.get_environment("HOME")
+		xdg_data_home = home.plus_file(
+			default_xdg_data_home_rel
+		).plus_file(
+			config_subdir_name
+		)
 		
+		# Create defaults
+		xdg_data_dirs = []
+		for default_loc in default_xdg_data_dirs:
+			xdg_data_dirs.append(
+				default_loc.plus_file(config_subdir_name)
+			)
+			
+		# Now check the XDG environment variables and if
+		# present, replace the defaults with them!
+		# See: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
+		# Checks the xdg data home var
+		if OS.has_environment("XDG_DATA_HOME"):
+			xdg_data_home = OS.get_environment("XDG_DATA_HOME").plus_file(config_subdir_name)
+		# Checks the list of files var, and processes them.
+		if OS.has_environment("XDG_DATA_DIRS"):
+			var raw_env_var := OS.get_environment("XDG_DATA_DIRS")
+			# includes empties.
+			var unappended_subdirs := raw_env_var.split(":", true)
+			xdg_data_dirs = []
+			for unapp_subdir in unappended_subdirs:
+				xdg_data_dirs.append(unapp_subdir.plus_file(config_subdir_name))
+			
+	else:
+		xdg_data_home = Global.root_directory
+		xdg_data_dirs = []
 	 
 
 
+func append_file_to_all(basepaths: Array, subpath: String) -> Array:
+	var res := []
+	for _path in basepaths:
+		res.append(_path.plus_file(subpath))
+	return res
+
+
+# Get search paths in order of priority
+func get_search_paths_in_order() -> Array:
+	return [xdg_data_home] + xdg_data_dirs
+	
+# Gets the paths, in order of search priority, for palettes.
+func get_palette_search_path_in_order() -> Array:
+	var base_paths := get_search_paths_in_order()
+	return append_file_to_all(base_paths, palettes_data_subdirectory)
+
+# Gets the paths, in order of search priority, for brushes.
+func get_brushes_search_path_in_order() -> Array:
+	var base_paths := get_search_paths_in_order()
+	return append_file_to_all(base_paths, brushes_data_subdirectory)
+	
+
+# Get the path that we are ok to be writing palettes to:
+func get_palette_write_path() -> String:
+	return xdg_data_home.plus_file(palettes_data_subdirectory)
+	
+# Get the path that we are ok to be writing brushes to:
+func get_brushes_write_path() -> String:
+	return xdg_data_home.plus_file(brushes_data_subdirectory)
+
+
+
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 #func _process(delta):
 #	pass