From 1365bd92213a0605d6b54a9fe04875f4df549356 Mon Sep 17 00:00:00 2001
From: Craig Jennings <c@cjennings.net>
Date: Fri, 23 Jan 2026 08:35:51 -0600
Subject: fix(archsetup): add btrfs detection, don't assume non-ZFS is btrfs

- Add is_btrfs_root() function
- Only install timeshift-autosnap and grub-btrfs on btrfs systems
- Skip snapshot tools on ext4/other filesystems
---
 archsetup | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/archsetup b/archsetup
index 1ccfcf4..4cc6199 100755
--- a/archsetup
+++ b/archsetup
@@ -384,6 +384,11 @@ is_zfs_root() {
     [ "$(findmnt -n -o FSTYPE /)" = "zfs" ]
 }
 
+is_btrfs_root() {
+    # Returns 0 (true) if root filesystem is btrfs, 1 (false) otherwise
+    [ "$(findmnt -n -o FSTYPE /)" = "btrfs" ]
+}
+
 # Encryption Detection
 is_encrypted_root() {
     # Returns 0 (true) if root filesystem is on an encrypted volume
@@ -1171,8 +1176,9 @@ EOF
         #   systemctl enable --now zfs-replicate.timer
         display "task" "zfs-replicate timer created (enable after SSH key setup to TrueNAS)"
 
-    else
-        # Non-ZFS (btrfs): Install timeshift-autosnap
+    elif is_btrfs_root; then
+        # Btrfs: Install timeshift-autosnap and grub-btrfs
+        display "task" "btrfs detected - installing snapshot tools"
         aur_install timeshift-autosnap
         pacman_install grub-btrfs
         action="enabling snapshot boot menu updates" && display "task" "$action"
@@ -1189,6 +1195,9 @@ EOF
 
         action="regenerating boot menu" && display "task" "$action"
         grub-mkconfig -o /boot/grub/grub.cfg >> "$logfile" 2>&1 || error "error" "$action" "$?"
+    else
+        # ext4 or other filesystem - no automatic snapshots
+        display "task" "ext4/other filesystem detected - skipping snapshot tools"
     fi
 }
 
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