adding an initial version of the sync script

scripts/sync.sh

+#!/usr/bin/env bash
+
+REMOTE="vaa2:/data/common/GEOCAT_ANCILLARY_DATA/"
+LOCAL="data/"
+
+if [ ! -d ${LOCAL} ]; then
+    echo "${LOCAL} not found. This script expects to be run from the geocat-ancillary/ directory."
+    exit 1
+fi
+
+list_updated_files() {
+    rsync --dry-run --copy-links -rcv ${REMOTE} ${LOCAL} | \
+        grep -v "receiving" | \
+        grep -v "bytes/sec" | \
+        grep -v "DRY RUN"
+}
+
+echo "Retrieving a list of updated & new files from:"
+echo "${REMOTE}"
+echo "Get a ☕ , this could take a bit..."
+
+for file in $(list_updated_files); do
+    echo ""
+    echo "${file} is updated or new. Download?"
+    select yn in "Yes" "No"; do
+        case ${yn} in
+            Yes ) rsync --progress --copy-links ${REMOTE}${file} ${LOCAL}${file}; break;;
+            No ) break;;
+        esac
+    done
+done