diff_to_gsutils.sh

#!/bin/bash
##
# uses this env:
# REMOTE_BUCKET: gcs bucket adress prefix (can include foldername)
# FILENAME_PREFIX: Filename prefix (prefix on basename)

LOCAL_LS="$(tempfile)"
REMOTE_LS="$(tempfile)"

gsutil ls "$REMOTE_BUCKET$FILENAME_PREFIX*" | cut -d "/" -f5 > "$REMOTE_LS"

ls | grep "$FILENAME_PREFIX" > "$LOCAL_LS"

for FILE in $(diff -u "$REMOTE_LS" "$LOCAL_LS" | grep -E "^\+[^\+]" | cut -c 2-); do
  echo "upload $FILE"
  gsutil cp "$FILE" "$REMOTE_BUCKET"
done

for FILE in $(diff -u "$REMOTE_LS" "$LOCAL_LS" | grep -E "^-[^-]" | cut -c 2-); do
  echo "remove $FILE"
  gsutil rm "$REMOTE_BUCKET$FILE"
done