autosquash=
keep_empty=
test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
-gpg_sign_opt=
+case "$(git config --bool commit.gpgsign)" in
+true) gpg_sign_opt=-S ;;
+*) gpg_sign_opt= ;;
+esac
read_basic_state () {
test -f "$state_dir/head-name" &&