Allow plugins to register at the root

package.json

@@ -52,7 +52,6 @@
     "@types/wtfnode": "^0.7.0",
     "@typescript-eslint/eslint-plugin": "^4.7.0",
     "@typescript-eslint/parser": "^4.7.0",
-    "compression": "^1.7.4",
     "doctoc": "^1.4.0",
     "eslint": "^7.7.0",
     "eslint-config-prettier": "^6.0.0",
@@ -77,6 +76,7 @@
   "dependencies": {
     "@coder/logger": "1.1.16",
     "body-parser": "^1.19.0",
+    "compression": "^1.7.4",
     "cookie-parser": "^1.4.5",
     "env-paths": "^2.2.0",
     "express": "^5.0.0-alpha.8",

src/node/plugin.ts

@@ -251,7 +251,7 @@ export class PluginAPI {
     if (!p.routerPath) {
       throw new Error("plugin missing router path")
     }
-    if (!p.routerPath.startsWith("/") || p.routerPath.length < 2) {
+    if (!p.routerPath.startsWith("/")) {
       throw new Error(`plugin router path ${q(p.routerPath)}: invalid`)
     }
     if (!p.homepageURL) {

test/plugin.test.ts

@@ -3,6 +3,7 @@ import * as express from "express"
 import * as fs from "fs"
 import * as path from "path"
 import { HttpCode } from "../src/common/http"
+import { AuthType } from "../src/node/cli"
 import { codeServer, PluginAPI } from "../src/node/plugin"
 import * as apps from "../src/node/routes/apps"
 import * as httpserver from "./httpserver"
@@ -26,6 +27,28 @@ describe("plugin", () => {
 
     const app = express.default()
     const wsApp = express.default()
+
+    const common: express.RequestHandler = (req, _, next) => {
+      // Routes might use these arguments.
+      req.args = {
+        _: [],
+        auth: AuthType.None,
+        host: "localhost",
+        port: 8080,
+        "proxy-domain": [],
+        config: "~/.config/code-server/config.yaml",
+        verbose: false,
+        usingEnvPassword: false,
+        usingEnvHashedPassword: false,
+        "extensions-dir": "",
+        "user-data-dir": "",
+      }
+      next()
+    }
+
+    app.use(common)
+    wsApp.use(common)
+
     papi.mount(app, wsApp)
     app.use("/api/applications", apps.router(papi))