Add plugin system

.gitignore

@@ -10,3 +10,4 @@ release-gcp/
 release-images/
 node_modules
 node-*
+/plugins

ci/dev/vscode.patch

@@ -1306,17 +1306,16 @@ index 0000000000..56331ff1fc
 +require('../../bootstrap-amd').load('vs/server/entry');
 diff --git a/src/vs/server/ipc.d.ts b/src/vs/server/ipc.d.ts
 new file mode 100644
-index 0000000000..0a9c95d50e
+index 0000000000..5cc3e1f0f4
 --- /dev/null
 +++ b/src/vs/server/ipc.d.ts
-@@ -0,0 +1,117 @@
+@@ -0,0 +1,116 @@
 +/**
 + * External interfaces for integration into code-server over IPC. No vs imports
 + * should be made in this file.
 + */
 +export interface Options {
 +	base: string
-+	commit: string
 +	disableTelemetry: boolean
 +}
 +

src/node/app/vscode.ts

@@ -200,8 +200,6 @@ export class VscodeHttpProvider extends HttpProvider {
       .replace(`"{{WORKBENCH_WEB_CONFIGURATION}}"`, `'${JSON.stringify(options.workbenchWebConfiguration)}'`)
       .replace(`"{{NLS_CONFIGURATION}}"`, `'${JSON.stringify(options.nlsConfiguration)}'`)
     return this.replaceTemplates<Options>(route, response, {
-      base: this.base(route),
-      commit: this.options.commit,
       disableTelemetry: !!this.args["disable-telemetry"],
     })
   }

src/node/entry.ts

@@ -9,7 +9,8 @@ import { UpdateHttpProvider } from "./app/update"
 import { VscodeHttpProvider } from "./app/vscode"
 import { Args, bindAddrFromAllSources, optionDescriptions, parse, readConfigFile, setDefaults } from "./cli"
 import { AuthType, HttpServer, HttpServerOptions } from "./http"
-import { generateCertificate, hash, open, humanPath } from "./util"
+import { loadPlugins } from "./plugin"
+import { generateCertificate, hash, humanPath, open } from "./util"
 import { ipcMain, wrap } from "./wrapper"
 
 process.on("uncaughtException", (error) => {
@@ -77,6 +78,8 @@ const main = async (args: Args, cliArgs: Args, configArgs: Args): Promise<void>
   httpServer.registerHttpProvider("/login", LoginHttpProvider, args.config!, envPassword)
   httpServer.registerHttpProvider("/static", StaticHttpProvider)
 
+  await loadPlugins(httpServer, args)
+
   ipcMain().onDispose(() => {
     httpServer.dispose().then((errors) => {
       errors.forEach((error) => logger.error(error.message))

src/node/http.ts

@@ -235,30 +235,22 @@ export abstract class HttpProvider {
   /**
    * Replace common templates strings.
    */
-  protected replaceTemplates(route: Route, response: HttpStringFileResponse, sessionId?: string): HttpStringFileResponse
   protected replaceTemplates<T extends object>(
     route: Route,
     response: HttpStringFileResponse,
-    options: T,
-  ): HttpStringFileResponse
-  protected replaceTemplates(
-    route: Route,
-    response: HttpStringFileResponse,
-    sessionIdOrOptions?: string | object,
+    extraOptions?: Omit<T, "base" | "csStaticBase" | "logLevel">,
   ): HttpStringFileResponse {
-    if (typeof sessionIdOrOptions === "undefined" || typeof sessionIdOrOptions === "string") {
-      sessionIdOrOptions = {
-        base: this.base(route),
-        commit: this.options.commit,
-        logLevel: logger.level,
-        sessionID: sessionIdOrOptions,
-      } as Options
+    const options: Options = {
+      base: this.base(route),
+      commit: this.options.commit,
+      logLevel: logger.level,
+      ...extraOptions,
     }
     response.content = response.content
       .replace(/{{COMMIT}}/g, this.options.commit)
       .replace(/{{TO}}/g, Array.isArray(route.query.to) ? route.query.to[0] : route.query.to || "/dashboard")
       .replace(/{{BASE}}/g, this.base(route))
-      .replace(/"{{OPTIONS}}"/, `'${JSON.stringify(sessionIdOrOptions)}'`)
+      .replace(/"{{OPTIONS}}"/, `'${JSON.stringify(options)}'`)
     return response
   }
 
@@ -664,7 +656,7 @@ export class HttpServer {
         e = new HttpError("Not found", HttpCode.NotFound)
       }
       const code = typeof e.code === "number" ? e.code : HttpCode.ServerError
-      logger.debug("Request error", field("url", request.url), field("code", code))
+      logger.debug("Request error", field("url", request.url), field("code", code), field("error", error))
       if (code >= HttpCode.ServerError) {
         logger.error(error.stack)
       }

src/node/plugin.ts

@@ -0,0 +1,52 @@
+import { field, logger } from "@coder/logger"
+import * as fs from "fs"
+import * as path from "path"
+import * as util from "util"
+import { Args } from "./cli"
+import { HttpServer } from "./http"
+
+/* eslint-disable @typescript-eslint/no-var-requires */
+
+export type Activate = (httpServer: HttpServer, args: Args) => void
+
+export interface Plugin {
+  activate: Activate
+}
+
+const originalLoad = require("module")._load
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+require("module")._load = function (request: string, parent: object, isMain: boolean): any {
+  return originalLoad.apply(this, [request.replace(/^code-server/, path.resolve(__dirname, "../..")), parent, isMain])
+}
+
+const loadPlugin = async (pluginPath: string, httpServer: HttpServer, args: Args): Promise<void> => {
+  try {
+    const plugin: Plugin = require(pluginPath)
+    plugin.activate(httpServer, args)
+    logger.debug("Loaded plugin", field("name", path.basename(pluginPath)))
+  } catch (error) {
+    if (error.code !== "MODULE_NOT_FOUND") {
+      logger.warn(error.message)
+    } else {
+      logger.debug(error.message)
+    }
+  }
+}
+
+const _loadPlugins = async (httpServer: HttpServer, args: Args): Promise<void> => {
+  const pluginPath = path.resolve(__dirname, "../../plugins")
+  const files = await util.promisify(fs.readdir)(pluginPath, {
+    withFileTypes: true,
+  })
+  await Promise.all(files.map((file) => loadPlugin(path.join(pluginPath, file.name), httpServer, args)))
+}
+
+export const loadPlugins = async (httpServer: HttpServer, args: Args): Promise<void> => {
+  try {
+    await _loadPlugins(httpServer, args)
+  } catch (error) {
+    if (error.code !== "ENOENT") {
+      logger.warn(error.message)
+    }
+  }
+}