Add old server version warning

Author: kylecarbs

package.json

@@ -5,7 +5,7 @@
   "description": "Open any workspace with a single click.",
   "repository": "https://github.com/coder/vscode-coder",
   "preview": true,
-  "version": "0.0.4",
+  "version": "0.0.5",
   "engines": {
     "vscode": "^1.73.0"
   },
@@ -136,6 +136,7 @@
     "jsonc-parser": "^3.2.0",
     "ndjson": "^2.0.0",
     "pretty-bytes": "^6.0.0",
+    "semver": "^7.3.8",
     "ssh-config": "4.1.6",
     "tar-fs": "^2.1.1",
     "which": "^2.0.2",

src/remote.ts

@@ -1,5 +1,11 @@
 import axios from "axios"
-import { getWorkspace, getWorkspaceBuildLogs, getWorkspaceByOwnerAndName, startWorkspace } from "coder/site/src/api/api"
+import {
+  getBuildInfo,
+  getWorkspace,
+  getWorkspaceBuildLogs,
+  getWorkspaceByOwnerAndName,
+  startWorkspace,
+} from "coder/site/src/api/api"
 import { ProvisionerJobLog, Workspace, WorkspaceAgent } from "coder/site/src/api/typesGenerated"
 import EventSource from "eventsource"
 import find from "find-process"
@@ -8,6 +14,7 @@ import * as jsonc from "jsonc-parser"
 import * as os from "os"
 import * as path from "path"
 import prettyBytes from "pretty-bytes"
+import * as semver from "semver"
 import SSHConfig from "ssh-config"
 import * as vscode from "vscode"
 import * as ws from "ws"
@@ -42,6 +49,28 @@ export class Remote {
       throw new Error(`Invalid Coder SSH authority. Must be: <username>--<workspace>--<agent?>`)
     }
 
+    const buildInfo = await getBuildInfo()
+    const parsedVersion = semver.parse(buildInfo.version)
+    // Server versions before v0.14.1 don't support the vscodessh command!
+    if (
+      parsedVersion?.major === 0 &&
+      parsedVersion?.minor <= 14 &&
+      parsedVersion?.patch < 1 &&
+      parsedVersion?.prerelease.length === 0
+    ) {
+      await this.vscodeProposed.window.showErrorMessage(
+        "Incompatible Server",
+        {
+          detail: "Your Coder server is too old to support the Coder extension! Please upgrade to v0.14.1 or newer.",
+          modal: true,
+          useCustom: true,
+        },
+        "Close Remote",
+      )
+      await this.closeRemote()
+      return
+    }
+
     // Find the workspace from the URI scheme provided!
     let workspace: Workspace
     try {

yarn.lock

@@ -4361,7 +4361,7 @@ semver@^6.0.0, semver@^6.1.2, semver@^6.3.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
 
-semver@^7.2.1, semver@^7.3.4, semver@^7.3.5, semver@^7.3.7:
+semver@^7.2.1, semver@^7.3.4, semver@^7.3.5, semver@^7.3.7, semver@^7.3.8:
   version "7.3.8"
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.8.tgz#07a78feafb3f7b32347d725e33de7e2a2df67798"
   integrity sha512-NB1ctGL5rlHrPJtFDVIVzTyQylMLu9N9VICA6HSFJo8MCGVTMW6gfpicwKmmK/dAjTOrqu5l63JJOpDSrAis3A==