Refactor wireguard to use a different config dir instead of /etc/wireguard

src/utils/derive-wireguard-interface-name.test.ts

@@ -0,0 +1,21 @@
+import { describe, expect, test } from "bun:test";
+import deriveWireguardInterfaceName from "./derive-wireguard-interface-name";
+
+describe("deriveWireguardInterfaceName", () => {
+    test("derives interface name from host id", () => {
+        expect(deriveWireguardInterfaceName({ host_id: 0 })).toBe("wgui0");
+        expect(deriveWireguardInterfaceName({ host_id: 1 })).toBe("wgui1");
+        expect(deriveWireguardInterfaceName({ host_id: 7 })).toBe("wgui7");
+    });
+
+    test("uses a project-scoped prefix, never stock wgN", () => {
+        expect(deriveWireguardInterfaceName({ host_id: 0 })).not.toBe("wg0");
+        expect(deriveWireguardInterfaceName({ host_id: 1 })).not.toBe("wg1");
+    });
+
+    test("prefix matches wg-quick interface name requirements (<= 15 chars)", () => {
+        expect(deriveWireguardInterfaceName({ host_id: 0 }).length).toBeLessThanOrEqual(
+            15,
+        );
+    });
+});

src/utils/derive-wireguard-interface-name.ts

@@ -0,0 +1,9 @@
+const WIREGUARD_INTERFACE_NAME_PREFIX = `wgui`;
+
+type Params = {
+    host_id: number;
+};
+
+export default function deriveWireguardInterfaceName({ host_id }: Params) {
+    return `${WIREGUARD_INTERFACE_NAME_PREFIX}${host_id}`;
+}

src/utils/grab-dir-names.ts

@@ -33,8 +33,13 @@ export default function grabDirNames(params?: Params) {
     const WGUI_LIB_IP_TABLES_DIR = path.join(WGUI_LIB_DIR, `iptables`);
     const WGUI_LIB_KEYS_DIR = path.join(WGUI_LIB_DIR, `keys`);
     const WGUI_LIB_CLIENTS_CONFIGS_DIR = path.join(WGUI_LIB_DIR, `clients`);
+    const WGUI_LIB_HOSTS_CONFIGS_DIR = path.join(WGUI_LIB_DIR, `hosts`);
+    const WGUI_LIB_SCRIPTS_DIR = path.join(WGUI_LIB_DIR, `scripts`);
+    const WGUI_WG_QUICK_SYSTEMD_SCRIPT = path.join(
+        WGUI_LIB_SCRIPTS_DIR,
+        `wg-quick-systemd.sh`,
+    );
 
-    const WIREGUARD_HOST_CONFIG_DIR = `/etc/wireguard`;
     const WIREGUARD_PRIVATE_KEY_FILE_NAME = `private.key`;
     const WIREGUARD_PUBLIC_KEY_FILE_NAME = `public.key`;
     const WIREGUARD_CLIENT_CONFIG_FILE_NAME = `wg.conf`;
@@ -52,8 +57,10 @@ export default function grabDirNames(params?: Params) {
         WGUI_LIB_IP_TABLES_DIR,
         WGUI_LIB_KEYS_DIR,
         WGUI_LIB_CLIENTS_CONFIGS_DIR,
+        WGUI_LIB_HOSTS_CONFIGS_DIR,
+        WGUI_LIB_SCRIPTS_DIR,
+        WGUI_WG_QUICK_SYSTEMD_SCRIPT,
 
-        WIREGUARD_HOST_CONFIG_DIR,
         WIREGUARD_PRIVATE_KEY_FILE_NAME,
         WIREGUARD_PUBLIC_KEY_FILE_NAME,
         WIREGUARD_CLIENT_CONFIG_FILE_NAME,