Fixes #1176 - ensures default lines of context

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ### Fixed
 
+- Fixes [#1176](https://github.com/eamodio/vscode-gitlens/issues/1176) - Can't selectively apply stash
 - Fixes [#1212](https://github.com/eamodio/vscode-gitlens/issues/1212) - Stashes list doesn't refresh on deletion
 - Fixes [#1191](https://github.com/eamodio/vscode-gitlens/issues/1191) - "Gitlens › Views › Repositories: Auto Refresh" not working
 - Fixes [#1202](https://github.com/eamodio/vscode-gitlens/issues/1202) - "Copy Remote File Url" url-encodes the URL

src/git/git.ts

@@ -476,15 +476,23 @@ export namespace Git {
 		fileName: string,
 		ref1?: string,
 		ref2?: string,
-		options: { encoding?: string; filters?: GitDiffFilter[]; similarityThreshold?: number | null } = {},
+		options: {
+			encoding?: string;
+			filters?: GitDiffFilter[];
+			linesOfContext?: number;
+			renames?: boolean;
+			similarityThreshold?: number | null;
+		} = {},
 	): Promise<string> {
-		const params = [
-			'diff',
-			`-M${options.similarityThreshold == null ? '' : `${options.similarityThreshold}%`}`,
-			'--no-ext-diff',
-			'-U0',
-			'--minimal',
-		];
+		const params = ['diff', '--no-ext-diff', '--minimal'];
+
+		if (options.linesOfContext != null) {
+			params.push(`-U${options.linesOfContext}`);
+		}
+
+		if (options.renames) {
+			params.push(`-M${options.similarityThreshold == null ? '' : `${options.similarityThreshold}%`}`);
+		}
 
 		if (options.filters != null && options.filters.length !== 0) {
 			params.push(`--diff-filter=${options.filters.join(emptyStr)}`);

src/git/gitService.ts

@@ -521,9 +521,7 @@ export class GitService implements Disposable {
 
 		let patch;
 		try {
-			patch = await Git.diff(uri.repoPath, uri.fsPath, ref1, ref2, {
-				similarityThreshold: Container.config.advanced.similarityThreshold,
-			});
+			patch = await Git.diff(uri.repoPath, uri.fsPath, ref1, ref2);
 			void (await Git.apply(uri.repoPath, patch));
 		} catch (ex) {
 			const msg: string = ex?.toString() ?? emptyStr;
@@ -1524,6 +1522,8 @@ export class GitService implements Disposable {
 			const data = await Git.diff(root, file, ref1, ref2, {
 				...options,
 				filters: ['M'],
+				linesOfContext: 0,
+				renames: true,
 				similarityThreshold: Container.config.advanced.similarityThreshold,
 			});
 			// }