feat: add extension

integrations/vscode/extension.js

@@ -0,0 +1,31 @@
+const vscode = require('vscode');
+const { execFileSync } = require("child_process");
+
+function activate(context) {
+	const config = vscode.workspace.getConfiguration("alejandra");
+
+  context.subscriptions.push(
+    vscode.languages.registerDocumentFormattingEditProvider("nix", {
+      provideDocumentFormattingEdits: (document, _, _) => {
+        const range = new vscode.Range(0, 0, document.lineCount, 0);
+
+        try {
+          const formattedText = execFileSync(config.path, { input: document.getText() });
+          return [vscode.TextEdit.replace(range, formattedText.toString())];
+        }
+        catch (e) {
+          vscode.window.showErrorMessage(`alejandra failed: ${e}`);
+        }
+
+        return;
+      }
+    })
+  );
+}
+
+function deactivate() {}
+
+module.exports = {
+	activate,
+	deactivate
+}