fix(aztec-up): fall back to no timeout when /usr/bin/timeout absent (macOS) (#23310)

Author: nchamo

aztec-up/bin/0.0.1/install

@@ -55,9 +55,21 @@ function echo_yellow {
 }
 
 function timeout {
-  if [ "${CI:-0}" = "1" ] || [ "${CI:-0}" = "true" ]; then
+  if [ "${CI:-0}" != "1" ] && [ "${CI:-0}" != "true" ]; then
+    shift
+    "$@"
+    return
+  fi
+  if [ -x /usr/bin/timeout ]; then
+    # Prefer coreutils `timeout` when available. Absolute path avoids re-entering this function.
     /usr/bin/timeout "$@"
+  elif perl -e1 2>/dev/null; then
+    # Fall back to perl's `alarm` when /usr/bin/timeout is missing.
+    local duration=$1
+    shift
+    perl -e "alarm $duration; exec @ARGV" -- "$@"
   else
+    # No timeout backend available -- run unguarded rather than fail the install.
     shift
     "$@"
   fi