package_info: fix check_launchpad_repo needing web requests (use git)

src/package_info.rs

@@ -20,15 +20,15 @@ pub fn ppa_to_base_url(user: &str, name: &str) -> String {
 
 async fn check_launchpad_repo(package: &str) -> Result<Option<String>, Box<dyn Error>> {
     let url = format!("https://git.launchpad.net/ubuntu/+source/{}", package);
-    let client = reqwest::Client::builder()
-        .redirect(reqwest::redirect::Policy::none())
-        .build()?;
-    let response = client.head(&url).send().await?;
 
-    if response.status().is_success() {
-        Ok(Some(url))
-    } else {
-        Ok(None)
+    // Use libgit2 to check if the remote repository exists
+    // This is more reliable than HTTP HEAD requests when CGIt is disabled
+    match git2::Remote::create_detached(url.clone()) {
+        Ok(mut remote) => match remote.connect(git2::Direction::Fetch) {
+            Ok(_) => Ok(Some(url)),
+            Err(_) => Ok(None),
+        },
+        Err(_) => Ok(None),
     }
 }