Add warning to symlink creation (#584)

src/path_ext.rs

@@ -1,3 +1,5 @@
+use log::warn;
+
 pub trait PathExt {
     fn ensure_exists_silently(self) -> Self;
 }
@@ -6,7 +8,9 @@ impl<T: AsRef<std::path::Path>> PathExt for T {
     /// Ensures a path is existing by creating it recursively
     /// if it is missing. No error is emitted if the creation has failed.
     fn ensure_exists_silently(self) -> Self {
-        std::fs::create_dir_all(self.as_ref()).ok();
+        if let Err(err) = std::fs::create_dir_all(self.as_ref()) {
+            warn!("Failed to create directory {:?}: {}", self.as_ref(), err);
+        }
         self
     }
 }