Merge pull request #50869 from Krzysztof-Cieslak/fix50820

Add support for `1.txt` format in incrementFileName

src/vs/workbench/parts/files/electron-browser/fileActions.ts

@@ -1083,6 +1083,17 @@ export function incrementFileName(name: string, isFolder: boolean): string {
 		});
 	}
 
+	// 1.txt=>2.txt
+	let prefixFileNoNameRegex = RegExp('(\\d+)(\\..*)$');
+	if (!isFolder && name.match(prefixFileNoNameRegex)) {
+		return name.replace(prefixFileNoNameRegex, (match, g1?, g2?) => {
+			let number = parseInt(g1);
+			return number < maxNumber
+				? strings.pad(number + 1, g1.length) + g2
+				: strings.format('{0}.1{1}', g1, g2);
+		});
+	}
+
 	// file.txt=>file.1.txt
 	const lastIndexOfDot = name.lastIndexOf('.');
 	if (!isFolder && lastIndexOfDot >= 0) {

src/vs/workbench/parts/files/test/electron-browser/fileActions.test.ts

@@ -106,6 +106,18 @@ suite('Files - Increment file name', () => {
 		assert.strictEqual(result, '2.test.js');
 	});
 
+	test('Increment file name with just version in name', function () {
+		const name = '1.js';
+		const result = incrementFileName(name, false);
+		assert.strictEqual(result, '2.js');
+	});
+
+	test('Increment file name with just version in name, too big number', function () {
+		const name = '9007199254740992.js';
+		const result = incrementFileName(name, false);
+		assert.strictEqual(result, '9007199254740992.1.js');
+	});
+
 	test('Increment file name with prefix version, trailing zeros', function () {
 		const name = '001.test.js';
 		const result = incrementFileName(name, false);