Intl is not defined in Safari < 10

src/vs/base/common/comparers.ts

@@ -7,10 +7,41 @@
 import scorer = require('vs/base/common/scorer');
 import strings = require('vs/base/common/strings');
 
-const FileNameComparer = new Intl.Collator(undefined, { numeric: true, sensitivity: 'base' });
+let intlFileNameComparer: Intl.Collator;
+
+export function setFileNameComparer(collator: Intl.Collator): void {
+	intlFileNameComparer = collator;
+}
 
 export function compareFileNames(one: string, other: string): number {
-	return FileNameComparer.compare(one || '', other || '');
+	if (intlFileNameComparer) {
+		return intlFileNameComparer.compare(one || '', other || '');
+	}
+
+	return noIntlCompareFileNames(one, other);
+}
+
+const FileNameMatch = /^([^.]*)(\.(.*))?$/;
+
+export function noIntlCompareFileNames(one: string, other: string): number {
+	let oneMatch = FileNameMatch.exec(one.toLowerCase());
+	let otherMatch = FileNameMatch.exec(other.toLowerCase());
+
+	let oneName = oneMatch[1] || '';
+	let oneExtension = oneMatch[3] || '';
+
+	let otherName = otherMatch[1] || '';
+	let otherExtension = otherMatch[3] || '';
+
+	if (oneName !== otherName) {
+		return oneName < otherName ? -1 : 1;
+	}
+
+	if (oneExtension === otherExtension) {
+		return 0;
+	}
+
+	return oneExtension < otherExtension ? -1 : 1;
 }
 
 export function compareAnything(one: string, other: string, lookFor: string): number {

src/vs/workbench/electron-browser/main.ts

@@ -12,6 +12,7 @@ import { IOptions } from 'vs/workbench/common/options';
 import * as browser from 'vs/base/browser/browser';
 import { domContentLoaded } from 'vs/base/browser/dom';
 import errors = require('vs/base/common/errors');
+import comparer = require('vs/base/common/comparers');
 import platform = require('vs/base/common/platform');
 import paths = require('vs/base/common/paths');
 import uri from 'vs/base/common/uri';
@@ -46,11 +47,15 @@ export interface IWindowConfiguration extends ParsedArgs, IOpenFileRequest {
 }
 
 export function startup(configuration: IWindowConfiguration): TPromise<void> {
+
 	// Ensure others can listen to zoom level changes
 	browser.setZoomFactor(webFrame.getZoomFactor());
 	browser.setZoomLevel(webFrame.getZoomLevel());
 	browser.setFullscreen(!!configuration.fullscreen);
 
+	// Setup Intl
+	comparer.setFileNameComparer(new Intl.Collator(undefined, { numeric: true, sensitivity: 'base' }));
+
 	// Shell Options
 	const filesToOpen = configuration.filesToOpen && configuration.filesToOpen.length ? toInputs(configuration.filesToOpen) : null;
 	const filesToCreate = configuration.filesToCreate && configuration.filesToCreate.length ? toInputs(configuration.filesToCreate) : null;