fix(ubicloud): keep pack's ignored-subdirectory behavior as reviewed in pass 1 (the whole-directory fallback could ship ignored files)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

scripts/ubicloud/ubi-runner.sh

@@ -1116,14 +1116,11 @@ cmd_down() {
 # subdirectory of a work tree ships the same file set without a .git: git's
 # local transport fetches only from a repository's root, and the whole
 # repository's .git would show the VM every file outside the subdirectory as
-# deleted (GST-935). A directory git ignores has no such file set and is
-# taken whole, like a non-git directory.
+# deleted (GST-935).
 cmd_pack() {
   local src tmp gitdir branch head entry
   src=$(cd "${1:-.}" && pwd)
-  if ! git -C "$src" rev-parse --is-inside-work-tree >/dev/null 2>&1 || git -C "$src" check-ignore -q .; then
-    COPYFILE_DISABLE=1 tar -C "$src" -czf - .
-  elif [ -n "$(git -C "$src" rev-parse --show-prefix)" ]; then
+  if git -C "$src" rev-parse --is-inside-work-tree >/dev/null 2>&1 && [ -n "$(git -C "$src" rev-parse --show-prefix)" ]; then
     (
       cd "$src"
       export COPYFILE_DISABLE=1
@@ -1134,7 +1131,7 @@ cmd_pack() {
         | tar --null -T - -cf - \
         | gzip -c
     )
-  else
+  elif git -C "$src" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
     head=$(git -C "$src" rev-parse --verify -q HEAD) || die "pack: $src has no commits; the VM needs a HEAD to fingerprint"
     branch=$(git -C "$src" symbolic-ref -q --short HEAD || true)
     tmp=$(mktemp -d)
@@ -1185,6 +1182,8 @@ cmd_pack() {
         && gzip -c "$tmp/files.tar"
     )
     rm -rf "$tmp"; trap - EXIT
+  else
+    COPYFILE_DISABLE=1 tar -C "$src" -czf - .
   fi
 }