fix(worker): decode URL-encoded characters in local repo remote URLs

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Fixed issue where local repos with URL-encoded spaces in remote URLs would fail to load tree preview and index correctly. [#898](https://github.com/sourcebot-dev/sourcebot/issues/898)
+
 ## [4.10.30] - 2026-02-12
 
 ### Added

packages/backend/src/repoCompileUtils.test.ts

@@ -143,6 +143,26 @@ describe('compileGenericGitHostConfig_file', () => {
         expect(result.warnings[0]).toContain('/path/to/invalid/repo');
         expect(result.warnings[0]).toContain('not a git repository');
     });
+
+    test('should decode URL-encoded characters in origin url pathname', async () => {
+        mockedGlob.mockResolvedValue(['/path/to/repo-with-spaces']);
+        mockedIsPathAValidGitRepoRoot.mockResolvedValue(true);
+        // URL with %20 (encoded space) in the pathname
+        mockedGetOriginUrl.mockResolvedValue('https://github.com/test/Project%20Name%20With%20Spaces.git');
+
+        const config = {
+            type: 'git' as const,
+            url: 'file:///path/to/repo-with-spaces',
+        };
+
+        const result = await compileGenericGitHostConfig_file(config, 1);
+
+        expect(result.repoData).toHaveLength(1);
+        expect(result.warnings).toHaveLength(0);
+        // The repo name should have decoded spaces, not %20
+        expect(result.repoData[0].name).toBe('github.com/test/Project Name With Spaces');
+        expect(result.repoData[0].displayName).toBe('github.com/test/Project Name With Spaces');
+    });
 });
 
 describe('compileGenericGitHostConfig_url', () => {

packages/backend/src/repoCompileUtils.ts

@@ -586,7 +586,9 @@ export const compileGenericGitHostConfig_file = async (
         // the host:port directly from the raw URL to match zoekt's behavior.
         // For non-HTTP URLs, remoteUrl.host preserves non-default ports (e.g., ssh://host:22/).
         const hostWithPort = extractHostWithPort(origin) ?? remoteUrl.host;
-        const repoName = path.join(hostWithPort, remoteUrl.pathname.replace(/\.git$/, ''));
+        // Decode URL-encoded characters (e.g., %20 -> space) to ensure consistent repo names
+        const decodedPathname = decodeURIComponent(remoteUrl.pathname);
+        const repoName = path.join(hostWithPort, decodedPathname.replace(/\.git$/, ''));
 
         const repo: RepoData = {
             external_codeHostType: 'genericGitHost',