hf_ckpt_sync.sh: setsid/ionice optional (not present on the pod)

scripts/hf_ckpt_sync.sh

@@ -14,7 +14,9 @@ case "${1:-status}" in
   start) if running; then echo "already running pid $(cat $PIDF)"; exit 0; fi
          [ -s "$HOME/.cache/huggingface/token" ] || { echo "no HF token at ~/.cache/huggingface/token"; exit 1; }
          [ -x "$PY" ] || { /opt/conda/bin/python -m venv "$HOME/hfsync-venv" && "$HOME/hfsync-venv/bin/pip" install -q -U huggingface_hub; }
-         setsid nohup nice -n 19 ionice -c3 "$PY" -u scripts/hf_ckpt_sync.py --loop >> "$LOG" 2>&1 < /dev/null &
+         SETSID=""; command -v setsid >/dev/null && SETSID=setsid
+         IONICE=""; command -v ionice >/dev/null && IONICE="ionice -c3"
+         $SETSID nohup nice -n 19 $IONICE "$PY" -u scripts/hf_ckpt_sync.py --loop >> "$LOG" 2>&1 < /dev/null &
          sleep 3; running && echo "started pid $(cat $PIDF), log $LOG" || { echo "failed to start; see $LOG"; tail -5 "$LOG"; exit 1; } ;;
   stop)  running && kill "$(cat $PIDF)" && echo stopped || echo "not running" ;;
   once)  nice -n 19 ionice -c3 "$PY" -u scripts/hf_ckpt_sync.py >> "$LOG" 2>&1; tail -3 "$LOG" ;;