Feat Proposal: Check for biome config file on startup

src/main.ts

@@ -26,13 +26,21 @@ import { syntaxTree } from "./commands/syntaxTree";
 import { selectAndDownload, updateToLatest } from "./downloader";
 import { Session } from "./session";
 import { StatusBar } from "./statusBar";
-import { isMusl, setContextValue } from "./utils";
+import { checkForBiomeJson, isMusl, setContextValue } from "./utils";
 
 let client: LanguageClient;
 
 const IN_BIOME_PROJECT = "inBiomeProject";
 
 export async function activate(context: ExtensionContext) {
+
+	// Check if biome.json exists in the workspace.
+	const biomeJsonExists = await checkForBiomeJson();
+	if (!biomeJsonExists) {
+		window.showWarningMessage("Biome extension is disabled because biome.json is not found in the working directory.");
+		return;
+	}
+
 	// If the extension is disabled, abort the activation.
 	if (!workspace.getConfiguration("biome").get<boolean>("enabled", true)) {
 		return;

src/utils.ts

@@ -1,5 +1,5 @@
 import { spawnSync } from "node:child_process";
-import { type TextDocument, type TextEditor, commands } from "vscode";
+import { type TextDocument, type TextEditor, commands, workspace, Uri } from "vscode";
 
 const SUPPORTED_LANGUAGES = new Set(["javascript", "typescript"]);
 
@@ -50,3 +50,25 @@ export function isMusl() {
 		return false;
 	}
 }
+
+/**
+ * Checks if the current workspace has a biome.json or biome.jsonc file
+ * @returns boolean
+ */
+export async function checkForBiomeJson(): Promise<boolean> {
+	const folders = workspace.workspaceFolders;
+	if (!folders) return false;
+
+	for (const folder of folders) {
+		const biomeJsonPath = Uri.joinPath(folder.uri, "biome.json");
+		const biomeJsoncPath = Uri.joinPath(folder.uri, "biome.jsonc");
+
+		const biomeJsonExists = await workspace.fs.stat(biomeJsonPath.fsPath).then(() => true).catch(() => false);
+		const biomeJsoncExists = await workspace.fs.stat(biomeJsoncPath.fsPath).then(() => true).catch(() => false);
+
+		if (biomeJsonExists || biomeJsoncExists) {
+			return true;
+		}
+	}
+	return false;
+}