refactor: simplify get_repository error handling using and_then and with_context

Author: reddevilmidzy

src/file_manager/git.rs

@@ -164,17 +164,14 @@ impl GitManager {
 
     fn get_repository(&self) -> Result<Repository> {
         let path = PathBuf::from(UPLOAD_DIR).join(self.problem_id.to_string());
-        if let Ok(repo) = Repository::open(&path) {
-            let mut config = repo.config()?;
-            config.set_str("user.name", "admin")?;
-            config.set_str("user.email", "[email protected]")?;
-            Ok(repo)
-        } else {
-            Err(anyhow::anyhow!(
-                "Failed to open git repository at {:?}",
-                path
-            ))
-        }
+        Repository::open(&path)
+            .with_context(|| format!("Failed to open git repository at {:?}", path))
+            .and_then(|repo| {
+                let mut config = repo.config()?;
+                config.set_str("user.name", "admin")?;
+                config.set_str("user.email", "[email protected]")?;
+                Ok(repo)
+            })
     }
 }