Add rsync_excludes helper + self-check

Emits one anchored --exclude=/<dir>/ per SBO_PERSONAL_TREES key, so a
future rsync-based tree sync never deletes personal/pentesting clones
that are not on the sync source.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/sbo-batch-test b/sbo-batch-test
index 5f9695d..a29461b 100755
--- a/sbo-batch-test
+++ b/sbo-batch-test
@@ -321,6 +321,16 @@ update_base() {
   echo "Base patched."
 }
 
+# Echo one anchored `--exclude=/<dir>/` per SBO_PERSONAL_TREES key, one per
+# line. Anchored to the tree root so rsync --delete never wipes a personal
+# clone (they are not on the rsync source). Empty when no personal trees.
+rsync_excludes() {
+  local dir
+  for dir in "${!SBO_PERSONAL_TREES[@]}"; do
+    echo "--exclude=/$dir/"
+  done
+}
+
 # =============================================================================
 # Package cache. Persistent, on-disk store of built packages so unchanged deps
 # are installed from cache instead of rebuilt. Layout mirrors the SBo tree: