Support optional URL prefix for hook URL

src/main.rs

@@ -161,8 +161,20 @@ async fn run() -> anyhow::Result<()> {
 
     let matrix_client = matrix_connect(&config).await.context("Failed to connect to Matrix")?;
 
-    let gitlab = warp::path!("hooks" / "gitlab")
-        .and(warp::path::end())
+    let gitlab_root_path = if let Some(url_prefix) = config.url_prefix.as_ref() {
+        url_prefix.split('/').fold(warp::any().boxed(), |last, segment| {
+            if segment.is_empty() {
+                last
+            } else {
+                last.and(warp::path(segment.to_string())).boxed()
+            }
+        })
+    } else {
+        warp::any().boxed()
+    };
+
+    let gitlab = gitlab_root_path
+        .and(warp::path!("hooks" / "gitlab"))
         .and(warp::post())
         .and(warp::header::<String>("x-gitlab-token"))
         .and(warp::body::json())