feat: add "deno.future" setting (#1101)

client/src/commands.ts

@@ -112,11 +112,16 @@ export function startLanguageServer(
       return;
     }
 
-    const env = {
+    const config = vscode.workspace.getConfiguration(EXTENSION_NS);
+
+    const env: Record<string, string> = {
       ...process.env,
       "DENO_V8_FLAGS": getV8Flags(),
-      "NO_COLOR": true,
+      "NO_COLOR": "1",
     };
+    if (config.get<boolean>("future")) {
+      env["DENO_FUTURE"] = "1";
+    }
 
     const serverOptions: ServerOptions = {
       run: {
@@ -345,6 +350,9 @@ export function test(
     if (cacheDir?.trim()) {
       env["DENO_DIR"] = cacheDir.trim();
     }
+    if (config.get<boolean>("future")) {
+      env["DENO_FUTURE"] = "1";
+    }
     const nameRegex = `/^${name.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}$/`;
     const args = ["test", ...testArgs, "--filter", nameRegex, path];
 

client/src/debug_config_provider.ts

@@ -9,9 +9,16 @@ export class DenoDebugConfigurationProvider
   #extensionContext: DenoExtensionContext;
 
   #getEnv() {
-    const cache =
-      this.#extensionContext.clientOptions.initializationOptions().cache;
-    return cache ? { "DENO_DIR": cache } : undefined;
+    const settings = this.#extensionContext.clientOptions
+      .initializationOptions();
+    const env: Record<string, string> = {};
+    if (settings.cache) {
+      env["DENO_DIR"] = settings.cache;
+    }
+    if (settings.future) {
+      env["DENO_FUTURE"] = "1";
+    }
+    return env;
   }
 
   #getAdditionalRuntimeArgs() {

client/src/extension.ts

@@ -44,6 +44,7 @@ function handleConfigurationChange(event: vscode.ConfigurationChangeEvent) {
       event.affectsConfiguration("deno.enable") ||
       event.affectsConfiguration("deno.disablePaths") ||
       event.affectsConfiguration("deno.enablePaths") ||
+      event.affectsConfiguration("deno.future") ||
       event.affectsConfiguration("deno.internalInspect") ||
       event.affectsConfiguration("deno.logFile") ||
       event.affectsConfiguration("deno.path") ||

client/src/upgrade.ts

@@ -36,6 +36,9 @@ export async function denoUpgradePromptAndExecute(
   if (cacheDir?.trim()) {
     env["DENO_DIR"] = cacheDir.trim();
   }
+  if (config.get<boolean>("future")) {
+    env["DENO_FUTURE"] = "1";
+  }
   const definition: tasks.DenoTaskDefinition = {
     type: tasks.TASK_TYPE,
     command: "upgrade",

package.json

@@ -323,6 +323,16 @@
             1000
           ]
         },
+        "deno.future": {
+          "type": "boolean",
+          "markdownDescription": "Enable breaking features likely to be shipped in Deno 2.0.",
+          "default": false,
+          "scope": "window",
+          "examples": [
+            true,
+            false
+          ]
+        },
         "deno.importMap": {
           "type": "string",
           "default": null,