added Malcolm

Vagrant/resources/malcolm/name-map-ui/scripts/name-map-save-watch.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# Copyright (c) 2021 Battelle Energy Alliance, LLC.  All rights reserved.
+
+PROCESS_DIR=${NAME_MAP_SAVE_DIR:-/var/www/html/upload/}
+DEST_MAP=${NAME_MAP_JSON:-/var/www/html/maps/net-map.json}
+
+inotifywait -m -e close_write --format '%w%f' "${PROCESS_DIR}" | while read NEWFILE
+do
+  sleep 0.1
+  # verify that the file is json|txt and that it is valid JSON
+  FILEMIME=$(file -b --mime-type "$NEWFILE")
+  if ( echo "$FILEMIME" | grep -q -e "\(application/json\|text/plain\)" ) && ( python3 -mjson.tool "$NEWFILE" >/dev/null 2>&1 ); then
+    # move the new net-map.json file into its final location
+    # (done like this with "tee" since we may not be able to cp overwrite a volume-mounted file)
+    (>/dev/null tee "$DEST_MAP" < "$NEWFILE") && echo "\"$NEWFILE\" -> \"$DEST_MAP\""
+    rm -f "$NEWFILE"
+  else
+    # invalid or unhandled file type uploaded, delete it
+    (>&2 rm -f "$NEWFILE") && echo "Removed \"$NEWFILE\" (\"$FILEMIME\"): invalid file type or format"
+  fi
+done