fix: Do not add folders to bin at root of directory

Author: hyperupcall

pkg/lib/util/abstract-bins.sh

@@ -84,7 +84,7 @@ abstract.bins_search_heuristics() {
 done
 else
 for file in "$BPM_PACKAGES_PATH/$id"/*; do
-if [ -x "$file" ]; then
+if [[ -f "$file" && -x "$file" ]]; then
 abstract.bins_do_action "$action" "$file" "$remove_extensions"
 fi
 done

tests/do-plumbing-link-bins.bats

@@ -170,6 +170,22 @@ load 'util/init.sh'
 assert [ ! -e "$BPM_INSTALL_BIN/exec4.sh" ]
 }
 
+@test "does not add directories in root directory" {
+local site='github.com'
+local pkg='username/package'
+
+test_util.setup_pkg "$pkg"; {
+mkdir 'directory1'
+touch 'directory1/.gitkeep'
+}; test_util.finish_pkg
+test_util.mock_clone "$pkg" "$site/$pkg"
+
+run do-plumbing-link-bins "$site/$pkg"
+
+assert_success
+assert [ ! -e "$BPM_INSTALL_BIN/directory1" ]
+}
+
 @test "doesn't link root bins if there is a bin folder" {
 local site='github.com'
 local pkg="username/package"