From 391b9fc70bba9336071cef67bddaa90994ae7e23 Mon Sep 17 00:00:00 2001
From: Craig Jennings <c@cjennings.net>
Date: Sat, 17 Jan 2026 18:52:41 -0600
Subject: fix(archsetup): add cleanup trap to unmount tmpfs on exit

---
 archsetup | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/archsetup b/archsetup
index c656e25..a44295e 100755
--- a/archsetup
+++ b/archsetup
@@ -94,6 +94,15 @@ min_disk_space_gb=20
 state_dir="/var/lib/archsetup/state"
 error_messages=()
 
+### Cleanup Trap
+# Ensures tmpfs is unmounted if script exits unexpectedly
+cleanup() {
+    if mountpoint -q "$source_dir" 2>/dev/null; then
+        umount "$source_dir" 2>/dev/null
+    fi
+}
+trap cleanup EXIT
+
 ### State Tracking
 # Enables resuming from where the script left off if interrupted.
 # State is stored as marker files in $state_dir.
-- 
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