Merge pull request microsoft#2884 from D4N14L/user/danade/FixAlreadyExists

[node-core-library] Add support for `alreadyExistsBehavior` for symlinks and junctions

Author: octogonz

common/changes/@rushstack/node-core-library/user-danade-FixAlreadyExists_2021-09-01-23-31.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@rushstack/node-core-library",
+      "comment": "Add support for AlreadyExistsBehavior in symlink and junction scenarios",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@rushstack/node-core-library",
+  "email": "[email protected]"
+}

common/reviews/api/node-core-library.api.md

@@ -222,9 +222,11 @@ export class FileSystem {
     static getStatistics(path: string): FileSystemStats;
     static getStatisticsAsync(path: string): Promise<FileSystemStats>;
     static isErrnoException(error: Error): error is NodeJS.ErrnoException;
+    static isExistError(error: Error): boolean;
     static isFileDoesNotExistError(error: Error): boolean;
     static isFolderDoesNotExistError(error: Error): boolean;
     static isNotExistError(error: Error): boolean;
+    static isUnlinkNotPermittedError(error: Error): boolean;
     static move(options: IFileSystemMoveOptions): void;
     static moveAsync(options: IFileSystemMoveOptions): Promise<void>;
     static readFile(filePath: string, options?: IFileSystemReadFileOptions): string;