From 2b32281ebeb935c2fe7abd41b5bfa895240d032d Mon Sep 17 00:00:00 2001
From: Tim Toomey <tim@toomey.co.nz>
Date: Tue, 22 Aug 2023 23:52:37 +1200
Subject: [PATCH] [Fix] gracefully handle GNU tar on MacOS during `npm install`

GNU tar doesn't support using the -J flag required to unpack
xz-compressed tarballs. This change means that anyone using
GNU tar on MacOS will instead use gz-compressed tarballs.

Fixes #3034
---
 nvm.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/nvm.sh b/nvm.sh
index 626e4f7c78..aafd8436e3 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -4325,7 +4325,10 @@ nvm_supports_xz() {
   if [ "_${NVM_OS}" = '_darwin' ]; then
     local MACOS_VERSION
     MACOS_VERSION="$(sw_vers -productVersion)"
-    if nvm_version_greater "10.9.0" "${MACOS_VERSION}"; then
+    if tar --version | command grep -q GNU; then
+      # On macOS with GNU tar in use xv-compressed tarballs aren't supported
+      return 1
+    elif nvm_version_greater "10.9.0" "${MACOS_VERSION}"; then
       # macOS 10.8 and earlier doesn't support extracting xz-compressed tarballs with tar
       return 1
     fi