Fix issues with configuration directories

- Move the old data directory if possible.
- Fix extension path to not use a hard-coded path and instead use the
  data directory.
- Create every part of the path during startup.
- Create each path when a connection is made as well in case they are
  deleted while the server is running.
- Create every part of the path before saving settings or writing a file
  using the resource endpoint.

packages/protocol/src/common/util.ts

@@ -97,3 +97,22 @@ export const parse = (arg: string): any => { // tslint:disable-line no-any
 
 	return arg ? convert(JSON.parse(arg)) : arg;
 };
+
+export const mkdirP = async (path: string): Promise<void> => {
+	// Since our fills require this file, we can't import them up top or we get
+	// circular dependency issue.
+	const { mkdir } = require("fs") as typeof import("fs");
+	const { promisify } = require("util") as typeof import("util");
+	const split = path.replace(/^\/*|\/*$/g, "").split("/");
+	let dir = "";
+	while (split.length > 0) {
+		dir += "/" + split.shift();
+		try {
+			await promisify(mkdir)(dir);
+		} catch (error) {
+			if (error.code !== "EEXIST" && error.code !== "EISDIR") {
+				throw error;
+			}
+		}
+	}
+};