Caches git dir path in repo

src/git/models/repository.ts

@@ -20,7 +20,7 @@ import { updateRecordValue } from '../../system/object';
 import { basename, normalizePath } from '../../system/path';
 import { md5 } from '../../system/string';
 import { runGitCommandInTerminal } from '../../terminal';
-import type { GitProviderDescriptor, GitRepositoryCaches } from '../gitProvider';
+import type { GitDir, GitProviderDescriptor, GitRepositoryCaches } from '../gitProvider';
 import type { RemoteProviders } from '../remotes/remoteProviders';
 import { loadRemoteProviders } from '../remotes/remoteProviders';
 import type { RichRemoteProvider } from '../remotes/richRemoteProvider';
@@ -289,7 +289,7 @@ export class Repository implements Disposable {
 			return watcher;
 		}
 
-		const gitDir = await this.container.git.getGitDir(this.path);
+		const gitDir = await this.getGitDir();
 		if (gitDir != null) {
 			if (gitDir?.commonUri == null) {
 				watch.call(
@@ -596,6 +596,14 @@ export class Repository implements Disposable {
 		return this.container.git.getContributors(this.path, options);
 	}
 
+	private _gitDir: Promise<GitDir | undefined> | undefined;
+	private getGitDir(): Promise<GitDir | undefined> {
+		if (this._gitDir == null) {
+			this._gitDir = this.container.git.getGitDir(this.path);
+		}
+		return this._gitDir;
+	}
+
 	private _lastFetched: number | undefined;
 	@gate()
 	async getLastFetched(): Promise<number> {