Extract remote source provider registry into the vscode.git-base extension (#137656)

extensions/git-base/src/util.ts

@@ -0,0 +1,69 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+export interface IDisposable {
+	dispose(): void;
+}
+
+export function toDisposable(dispose: () => void): IDisposable {
+	return { dispose };
+}
+
+export function done<T>(promise: Promise<T>): Promise<void> {
+	return promise.then<void>(() => undefined);
+}
+
+export namespace Versions {
+	declare type VersionComparisonResult = -1 | 0 | 1;
+
+	export interface Version {
+		major: number;
+		minor: number;
+		patch: number;
+		pre?: string;
+	}
+
+	export function compare(v1: string | Version, v2: string | Version): VersionComparisonResult {
+		if (typeof v1 === 'string') {
+			v1 = fromString(v1);
+		}
+		if (typeof v2 === 'string') {
+			v2 = fromString(v2);
+		}
+
+		if (v1.major > v2.major) { return 1; }
+		if (v1.major < v2.major) { return -1; }
+
+		if (v1.minor > v2.minor) { return 1; }
+		if (v1.minor < v2.minor) { return -1; }
+
+		if (v1.patch > v2.patch) { return 1; }
+		if (v1.patch < v2.patch) { return -1; }
+
+		if (v1.pre === undefined && v2.pre !== undefined) { return 1; }
+		if (v1.pre !== undefined && v2.pre === undefined) { return -1; }
+
+		if (v1.pre !== undefined && v2.pre !== undefined) {
+			return v1.pre.localeCompare(v2.pre) as VersionComparisonResult;
+		}
+
+		return 0;
+	}
+
+	export function from(major: string | number, minor: string | number, patch?: string | number, pre?: string): Version {
+		return {
+			major: typeof major === 'string' ? parseInt(major, 10) : major,
+			minor: typeof minor === 'string' ? parseInt(minor, 10) : minor,
+			patch: patch === undefined || patch === null ? 0 : typeof patch === 'string' ? parseInt(patch, 10) : patch,
+			pre: pre,
+		};
+	}
+
+	export function fromString(version: string): Version {
+		const [ver, pre] = version.split('-');
+		const [major, minor, patch] = ver.split('.');
+		return from(major, minor, patch, pre);
+	}
+}