Adds a few useful scripts for auto upload and periodic download sync

scripts/crontab.txt

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+# This example runs grive on /home/USER/gdrive
+# See man crontab for format
+# This line runs at 5 after the hour and 35 after the hour
+
+5,35 * * * * /usr/bin/grive -p /home/USER/gdrive

scripts/grive-incron

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+#!/bin/bash
+
+# Allow grive to be called from incron
+# if your path is /home/User/gdrivef and this file is in /usr/local/bin then use the following incrontab line:
+# /home/User/gdrive IN_CREATE,IN_DELETE,IN_CLOSE_WRITE,IN_MOVE /usr/local/bin/grive-incron $# /home/User/gdrive
+
+# grive-incron a bash script to allow automatic push to gdrive from a directory
+# It is made to be called by # incron 
+#
+# Copyright (C) 2014 Al Williams ([email protected])
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+# You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
+
+PIDFILE=/tmp/grive-incron.lock
+
+if [ $# != 2 ] 
+then
+  >&2 echo Call from incron: \$# directory
+  exit 1
+fi
+if [ "$1" == .grive -o "$1" == .grive_state ] 
+then
+  exit 0  # ignore grive housekeeping files
+fi
+# Don't run multiple copies at once
+
+DLY=1
+
+while true
+  do
+  while [ -f "$PIDFILE"  ] && kill -0 `cat "$PIDFILE"` 2>/dev/null
+    do 
+      sleep $DLY
+      DLY=$((DLY+1))
+      DLY=$((DLY % 10 ))  # no more than 10 seconds
+    done
+    if ! kill -0 `cat "$PIDFILE" 2>/dev/null` 2>/dev/null
+    then
+      rm -f "$PIDFILE"
+    fi
+    if (set -o noclobber; echo $$>"$PIDFILE" ) >/dev/null
+    then 
+	trap 'rm -f "$PIDFILE"' INT TERM EXIT
+	break
+    fi
+done
+grive -p "$2"
+rm -f "$PIDFILE"
+trap - INT TERM EXIT
+exit 0

scripts/incron.txt

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+# Fix path below (2 places) and location of grive-incron script
+/home/USER/gdrive IN_CREATE,IN_DELETE,IN_CLOSE_WRITE,IN_MOVE /usr/bin/grive-incron $# /home/USER/gdrive
+

scripts/readme.txt

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+This directory contains a simple script that allows calling
+grive from incron. This will cause any changes you make
+to the local directory to automatically call grive to 
+update Google Drive. You can copy the script to a location on your 
+path:
+
+sudo cp grive-incron /usr/local/bin
+
+To make this work, you also need to insert the contents of incrontab.txt
+into your incrontab (after changing the paths to suit your 
+installation).
+
+To do this run:
+incrontab -e
+
+Then use the editor that appears to insert the line with your custom
+paths. You can ignore lines that start with # -- they are just comments
+although you can paste them into the incrontab if you like.
+
+To get the reverse, you can do a similar command in your crontab (see
+crontab.txt). The example syncs at 5 and 35 minutes after each hour
+but you can customize that by changing the crontab line.
+
+crontab -e
+
+will bring up an editor. Copy the line without the # in front from
+crontab.txt after fixing it for your specific path names. You can 
+skip the # lines or include them, as before.
+
+You probably don't want to do a crontab sync every minute because
+grive takes some time to run. The grive-incron script stalls if
+another copy of it or grive is running for the current user to 
+prevent overrun, but the crontab entry has on such protection. If you
+prefer, you could use the same script with a dummy file name in crontab.
+Then your crontab line would look something like this:
+
+5,35 * * * * /usr/local/bin/grive-incron DUMMY /home/USER/gdrive
+
+The word DUMMY is just a placeholder. It does not have to refer to a real
+file.