solve the issue #670 Configure similarity index for diffs

package.json

@@ -1293,6 +1293,12 @@
                     "markdownDescription": "Specifies whether to show avatar images instead of commit (or status) icons in the _Compare_ view",
                     "scope": "window"
                 },
+                "gitlens.views.compare.findRenames": {
+                    "type": "number",
+                    "default": 50,
+                    "markdownDescription": "Specifies the threshold for the rename similarity index.",
+                    "scope": "window"
+                },
                 "gitlens.views.compare.enabled": {
                     "type": "boolean",
                     "default": true,

src/config.ts

@@ -244,6 +244,7 @@ export interface CompareViewConfig {
     avatars: boolean;
     enabled: boolean;
     files: ViewsFilesConfig;
+    findRenames: number;
     location: ViewLocation;
 }
 

src/git/git.ts

@@ -525,8 +525,14 @@ export class Git {
         }
     }
 
-    static diff_nameStatus(repoPath: string, ref1?: string, ref2?: string, options: { filter?: string } = {}) {
-        const params = ['diff', '--name-status', '-M', '--no-ext-diff'];
+    static diff_nameStatus(
+        repoPath: string,
+        ref1?: string,
+        ref2?: string,
+        options: { filter?: string; findRenames?: number } = {}
+    ) {
+        const renameParameter = options.findRenames == null ? '-M' : `-M${options.findRenames}%`;
+        const params = ['diff', '--name-status', renameParameter, '--no-ext-diff'];
         if (options && options.filter) {
             params.push(`--diff-filter=${options.filter}`);
         }

src/git/gitService.ts

@@ -1309,7 +1309,7 @@ export class GitService implements Disposable {
         repoPath: string,
         ref1?: string,
         ref2?: string,
-        options: { filter?: string } = {}
+        options: { filter?: string; findRenames?: number } = {}
     ): Promise<GitFile[] | undefined> {
         try {
             const data = await Git.diff_nameStatus(repoPath, ref1, ref2, options);

src/views/nodes/resultsFilesNode.ts

@@ -82,7 +82,10 @@ export class ResultsFilesNode extends ViewNode<ViewWithFiles> {
     }
 
     private async getFilesQueryResultsCore(): Promise<FilesQueryResults> {
-        const diff = await Container.git.getDiffStatus(this.uri.repoPath!, this._ref1, this._ref2);
+        const diff = await Container.git.getDiffStatus(this.uri.repoPath!, this._ref1, this._ref2, {
+            findRenames: Container.config.views.compare.findRenames
+        });
+
         return {
             label: `${Strings.pluralize('file', diff !== undefined ? diff.length : 0, { zero: 'No' })} changed`,
             diff: diff

src/views/nodes/statusFilesNode.ts

@@ -119,7 +119,10 @@ export class StatusFilesNode extends ViewNode<RepositoriesView> {
 
         if (this.status.upstream !== undefined && this.status.state.ahead > 0) {
             if (files > 0) {
-                const aheadFiles = await Container.git.getDiffStatus(this.repoPath, `${this.status.upstream}...`);
+                const aheadFiles = await Container.git.getDiffStatus(this.repoPath, `${this.status.upstream}...`, undefined, {
+                    findRenames: Container.config.views.compare.findRenames
+                });
+
                 if (aheadFiles !== undefined) {
                     const uniques = new Set();
                     for (const f of this.status.files) {