Allow opening files, folders, and workspaces in existing code-server from CLI (#1994)

Add initial support for opening files / folders in running code-server instance.

Current limitations:

- unable to open a file in a new window, only folders
- unable to use addMode feature
- others...

src/node/cli.ts

@@ -45,6 +45,9 @@ export interface Args extends VsArgs {
   readonly "proxy-domain"?: string[]
   readonly locale?: string
   readonly _: string[]
+  readonly "open-in"?: boolean
+  readonly "reuse-window"?: boolean
+  readonly "new-window"?: boolean
 }
 
 interface Option<T> {
@@ -139,6 +142,18 @@ const options: Options<Required<Args>> = {
   "show-versions": { type: "boolean", description: "Show VS Code extension versions." },
   "proxy-domain": { type: "string[]", description: "Domain used for proxying ports." },
 
+  "open-in": { type: "boolean", short: "oi", description: "Open file(s) or folder(s) in running instance" },
+  "new-window": {
+    type: "boolean",
+    short: "n",
+    description: "Force to open a new window. (use with open-in)",
+  },
+  "reuse-window": {
+    type: "boolean",
+    short: "r",
+    description: "Force to open a file or folder in an already opened window. (use with open-in)",
+  },
+
   locale: { type: "string" },
   log: { type: LogLevel },
   verbose: { type: "boolean", short: "vvv", description: "Enable verbose logging." },

src/node/entry.ts

 import { field, logger } from "@coder/logger"
 import * as cp from "child_process"
+import { promises as fs } from "fs"
+import http from "http"
 import * as path from "path"
-import { CliMessage } from "../../lib/vscode/src/vs/server/ipc"
+import { CliMessage, OpenCommandPipeArgs } from "../../lib/vscode/src/vs/server/ipc"
 import { plural } from "../common/util"
 import { LoginHttpProvider } from "./app/login"
 import { ProxyHttpProvider } from "./app/proxy"
@@ -162,6 +164,58 @@ async function entry(): Promise<void> {
       console.log(version, commit)
     }
     process.exit(0)
+  } else if (args["open-in"]) {
+    if (!process.env["VSCODE_IPC_HOOK_CLI"]) {
+      logger.error("VSCODE_IPC_HOOK_CLI missing from environment, unable to run")
+      process.exit(1)
+    }
+    const pipeArgs: OpenCommandPipeArgs = { type: "open", folderURIs: [] }
+    pipeArgs.forceReuseWindow = args["reuse-window"]
+    pipeArgs.forceNewWindow = args["new-window"]
+    const isDir = async (path: string): Promise<boolean> => {
+      try {
+        const st = await fs.stat(path)
+        return st.isDirectory()
+      } catch (error) {
+        return false
+      }
+    }
+    for (let i = 0; i < args._.length; i++) {
+      const fp = path.resolve(args._[i])
+      if (await isDir(fp)) {
+        pipeArgs.folderURIs.push(fp)
+      } else {
+        if (!pipeArgs.fileURIs) {
+          pipeArgs.fileURIs = []
+        }
+        pipeArgs.fileURIs.push(fp)
+      }
+    }
+    if (pipeArgs.forceNewWindow && pipeArgs.fileURIs && pipeArgs.fileURIs.length > 0) {
+      logger.error("new-window can only be used with folder paths")
+      process.exit(1)
+    }
+    if (pipeArgs.folderURIs.length === 0 && (!pipeArgs.fileURIs || pipeArgs.fileURIs.length === 0)) {
+      logger.error("open-in expects at least one file or folder argument")
+      process.exit(1)
+    }
+    const vscode = http.request(
+      {
+        path: "/",
+        method: "POST",
+        socketPath: process.env["VSCODE_IPC_HOOK_CLI"],
+      },
+      (res) => {
+        res.on("data", (message) => {
+          logger.debug("Got message from VS Code", field("message", message.toString()))
+        })
+      },
+    )
+    vscode.on("error", (err) => {
+      logger.debug("Got error from VS Code", field("error", err))
+    })
+    vscode.write(JSON.stringify(pipeArgs))
+    vscode.end()
   } else if (args["list-extensions"] || args["install-extension"] || args["uninstall-extension"]) {
     logger.debug("forking vs code cli...")
     const vscode = cp.fork(path.resolve(__dirname, "../../lib/vscode/out/vs/server/fork"), [], {