refactor

build.sh

@@ -3,6 +3,11 @@
 main() {
    set -eo pipefail
 
+   cd_work_d
+   ensure_ytdlp2STRM_git
+}
+
+cd_work_d() {
    d="$PWD"
    mkdir -p ./work.d
    cd ./work.d
@@ -11,7 +16,9 @@ main() {
       $DEBUG rm -rf ./work.d || true
    }
    trap cleanup EXIT
+}
 
+ensure_ytdlp2STRM_git() {
    if [ ! -d ytdlp2STRM ]; then
       git clone --depth=1 \
          https://github.com/fe80Grau/ytdlp2STRM.git