Initial changes to integrate new portal

ansible/templates/on-usb-drive-mounted.sh.j2

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Run by udev when a USB drive is inserted
+# usage: /usr/bin/on-usb-drive-mounted.sh /media/%k
+
+# If the drive inserted contains a directory named "butter",
+# symlink it to /media/usb-butter
+device="$1"
+
+# The device might not be mounted yet, so wait for it.
+usb_mount_path=""
+for ((i=0; i<10; i++)); do
+    usb_mount_path=$(findmnt -n -o TARGET --source "$device")
+    if [ -n "$usb_mount_path" ]; then
+        break
+    fi
+    sleep 1
+done
+
+# findmnt will briefly return 1, so don't set e until we're done with it.
+set -e
+
+if [ -z "$usb_mount_path" ]; then
+    echo "Device $device is not mounted"
+    exit 1
+else
+    echo "Device $device mounted to: $usb_mount_path"
+fi
+
+butter_dir="$usb_mount_path"
+served_dir="/media/usb-butter"
+
+# make directory butter_dir world readable
+sudo chmod -R a+rx "$butter_dir"
+sudo chmod -R a+rx "/media/root/"
+
+if [ -d "$butter_dir" ]; then
+    # Delete served_dir if it exists
+    if [ -L "$served_dir" ]; then
+        sudo rm "$served_dir"
+    fi
+    echo "Linking $butter_dir to $served_dir"
+    ln -sf "$butter_dir" "$served_dir"
+    sudo chown -R {{ butter_user }}:{{ butter_user }} $served_dir
+else
+    echo "No butter directory $butter_dir found on $device"
+    exit 1
+fi