[haste-map]: Ignore Sapling vcs directories

Summary: Ignore `.sl` directories in HasteMap.  This will allow Sapling to be
used with jest projects

Test Plan: `packages/jest-haste-map/src/__tests__/index.test.js` similar
testing plan to what's in #13673

Closes #13673

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ### Features
 
+- `[jest-haste-map]` ignore Sapling vcs directories (`.sl/`) ([#13674](https://github.com/facebook/jest/pull/13674))
+
 ### Fixes
 
 - `[jest-resolve]` add global paths to `require.resolve.paths` ([#13633](https://github.com/facebook/jest/pull/13633))

docs/Configuration.md

@@ -2256,7 +2256,7 @@ An array of RegExp patterns that are matched against all source file paths befor
 
 These patterns match against the full path. Use the `<rootDir>` string token to include the path to your project's root directory to prevent it from accidentally ignoring all of your files in different environments that may have different root directories. Example: `["<rootDir>/node_modules/"]`.
 
-Even if nothing is specified here, the watcher will ignore changes to the version control folders (.git, .hg). Other hidden files and directories, i.e. those that begin with a dot (`.`), are watched by default. Remember to escape the dot when you add them to `watchPathIgnorePatterns` as it is a special RegExp character.
+Even if nothing is specified here, the watcher will ignore changes to the version control folders (.git, .hg, .sl). Other hidden files and directories, i.e. those that begin with a dot (`.`), are watched by default. Remember to escape the dot when you add them to `watchPathIgnorePatterns` as it is a special RegExp character.
 
 ```js tab
 /** @type {import('jest').Config} */

packages/jest-haste-map/src/__tests__/index.test.js

@@ -346,6 +346,14 @@ describe('HasteMap', () => {
     expect(hasteFS.matchFiles('.git')).toEqual([]);
   });
 
+  it('ignores sapling vcs directories without ignore pattern', async () => {
+    mockFs[path.join('/', 'project', 'fruits', '.sl', 'package.json')] = `
+      invalid}{
+    `;
+    const {hasteFS} = await (await HasteMap.create(defaultConfig)).build();
+    expect(hasteFS.matchFiles('.sl')).toEqual([]);
+  });
+
   it('ignores vcs directories with ignore pattern regex', async () => {
     const config = {...defaultConfig, ignorePattern: /Kiwi/};
     mockFs[path.join('/', 'project', 'fruits', 'Kiwi.js')] = `

packages/jest-haste-map/src/index.ts

@@ -125,7 +125,7 @@ const CHANGE_INTERVAL = 30;
 const MAX_WAIT_TIME = 240000;
 const NODE_MODULES = `${path.sep}node_modules${path.sep}`;
 const PACKAGE_JSON = `${path.sep}package.json`;
-const VCS_DIRECTORIES = ['.git', '.hg']
+const VCS_DIRECTORIES = ['.git', '.hg', '.sl']
   .map(vcs => escapePathForRegex(path.sep + vcs + path.sep))
   .join('|');