From 6d28298bb50aafb1008ecb162c8b093411b9a562 Mon Sep 17 00:00:00 2001
From: Ladislau Szomoru <3372902+lszomoru@users.noreply.github.com>
Date: Thu, 18 Dec 2025 14:53:58 +0000
Subject: [PATCH] Git - add option to ignore whitespace for the blame
 information (#284260)

---
 extensions/git/package.json      |  5 +++++
 extensions/git/package.nls.json  |  1 +
 extensions/git/src/blame.ts      | 12 ++++++++++++
 extensions/git/src/git.ts        |  6 +++++-
 extensions/git/src/repository.ts |  6 +++++-
 5 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/extensions/git/package.json b/extensions/git/package.json
index 906398098b7..2c6eadd99dd 100644
--- a/extensions/git/package.json
+++ b/extensions/git/package.json
@@ -3903,6 +3903,11 @@
           "default": "${authorName} (${authorDateAgo})",
           "markdownDescription": "%config.blameStatusBarItem.template%"
         },
+        "git.blame.ignoreWhitespace": {
+          "type": "boolean",
+          "default": false,
+          "markdownDescription": "%config.blameIgnoreWhitespace%"
+        },
         "git.commitShortHashLength": {
           "type": "number",
           "default": 7,
diff --git a/extensions/git/package.nls.json b/extensions/git/package.nls.json
index bb7ef820fab..c8834151c6f 100644
--- a/extensions/git/package.nls.json
+++ b/extensions/git/package.nls.json
@@ -306,6 +306,7 @@
 	"config.blameEditorDecoration.disableHover": "Controls whether to disable the blame information editor decoration hover.",
 	"config.blameStatusBarItem.enabled": "Controls whether to show blame information in the status bar.",
 	"config.blameStatusBarItem.template": "Template for the blame information status bar item. Supported variables:\n\n* `hash`: Commit hash\n\n* `hashShort`: First N characters of the commit hash according to `#git.commitShortHashLength#`\n\n* `subject`: First line of the commit message\n\n* `authorName`: Author name\n\n* `authorEmail`: Author email\n\n* `authorDate`: Author date\n\n* `authorDateAgo`: Time difference between now and the author date\n\n",
+	"config.blameIgnoreWhitespace": "Controls whether to ignore whitespace changes when computing blame information.",
 	"config.commitShortHashLength": "Controls the length of the commit short hash.",
 	"config.diagnosticsCommitHook.enabled": "Controls whether to check for unresolved diagnostics before committing.",
 	"config.diagnosticsCommitHook.sources": "Controls the list of sources (**Item**) and the minimum severity (**Value**) to be considered before committing. **Note:** To ignore diagnostics from a particular source, add the source to the list and set the minimum severity to `none`.",
diff --git a/extensions/git/src/blame.ts b/extensions/git/src/blame.ts
index 92ae680ae61..c6f121a01b3 100644
--- a/extensions/git/src/blame.ts
+++ b/extensions/git/src/blame.ts
@@ -126,6 +126,10 @@ interface LineBlameInformation {
 class GitBlameInformationCache {
 	private readonly _cache = new Map<Repository, LRUCache<string, BlameInformation[]>>();
 
+	clear(): void {
+		this._cache.clear();
+	}
+
 	delete(repository: Repository): boolean {
 		return this._cache.delete(repository);
 	}
@@ -267,11 +271,19 @@ export class GitBlameController {
 
 	private _onDidChangeConfiguration(e?: ConfigurationChangeEvent): void {
 		if (e &&
+			!e.affectsConfiguration('git.blame.ignoreWhitespace') &&
 			!e.affectsConfiguration('git.blame.editorDecoration.enabled') &&
 			!e.affectsConfiguration('git.blame.statusBarItem.enabled')) {
 			return;
 		}
 
+		// Clear cache when ignoreWhitespace setting changes
+		if (e && e.affectsConfiguration('git.blame.ignoreWhitespace')) {
+			this._repositoryBlameCache.clear();
+			this._updateTextEditorBlameInformation(window.activeTextEditor);
+			return;
+		}
+
 		const config = workspace.getConfiguration('git');
 		const editorDecorationEnabled = config.get<boolean>('blame.editorDecoration.enabled') === true;
 		const statusBarItemEnabled = config.get<boolean>('blame.statusBarItem.enabled') === true;
diff --git a/extensions/git/src/git.ts b/extensions/git/src/git.ts
index 5c2dc12996e..5c47f7f5b6b 100644
--- a/extensions/git/src/git.ts
+++ b/extensions/git/src/git.ts
@@ -2414,10 +2414,14 @@ export class Repository {
 		}
 	}
 
-	async blame2(path: string, ref?: string): Promise<BlameInformation[] | undefined> {
+	async blame2(path: string, ref?: string, ignoreWhitespace?: boolean): Promise<BlameInformation[] | undefined> {
 		try {
 			const args = ['blame', '--root', '--incremental'];
 
+			if (ignoreWhitespace) {
+				args.push('-w');
+			}
+
 			if (ref) {
 				args.push(ref);
 			}
diff --git a/extensions/git/src/repository.ts b/extensions/git/src/repository.ts
index d9e35e751ba..70957d2949c 100644
--- a/extensions/git/src/repository.ts
+++ b/extensions/git/src/repository.ts
@@ -2104,7 +2104,11 @@ export class Repository implements Disposable {
 	}
 
 	async blame2(path: string, ref?: string): Promise<BlameInformation[] | undefined> {
-		return await this.run(Operation.Blame(false), () => this.repository.blame2(path, ref));
+		return await this.run(Operation.Blame(false), () => {
+			const config = workspace.getConfiguration('git', Uri.file(this.root));
+			const ignoreWhitespace = config.get<boolean>('blame.ignoreWhitespace', false);
+			return this.repository.blame2(path, ref, ignoreWhitespace);
+		});
 	}
 
 	@throttle