From a9595bad3ed7fd5624a167bab00f1340e25846ed Mon Sep 17 00:00:00 2001
From: David Sherret <dsherret@users.noreply.github.com>
Date: Tue, 13 Jun 2023 09:48:13 -0400
Subject: [PATCH] fix(npm): warn when tarball contains hardlink or symlink
 (#19474)

This is to help us get some visibility into whether we need to support
this.
---
 cli/npm/tarball.rs | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/cli/npm/tarball.rs b/cli/npm/tarball.rs
index ce1ac33395..18a5556716 100644
--- a/cli/npm/tarball.rs
+++ b/cli/npm/tarball.rs
@@ -107,8 +107,26 @@ fn extract_tarball(data: &[u8], output_folder: &Path) -> Result<(), AnyError> {
         )
       }
     }
-    if entry.header().entry_type() == EntryType::Regular {
-      entry.unpack(&absolute_path)?;
+
+    let entry_type = entry.header().entry_type();
+    match entry_type {
+      EntryType::Regular => {
+        entry.unpack(&absolute_path)?;
+      }
+      EntryType::Symlink | EntryType::Link => {
+        // At the moment, npm doesn't seem to support uploading hardlinks or
+        // symlinks to the npm registry. If ever adding symlink or hardlink
+        // support, we will need to validate that the hardlink and symlink
+        // target are within the package directory.
+        log::warn!(
+          "Ignoring npm tarball entry type {:?} for '{}'",
+          entry_type,
+          absolute_path.display()
+        )
+      }
+      _ => {
+        // ignore
+      }
     }
   }
   Ok(())