Automatic backup with notifications and rsync

readme.md

Automatic backups on Mac OS X

Put com.user.automaticbackups.plist file into ~/Library/LaunchAgents directiry.

Enabling/Disabling

• Enable: launchctl load -w ~/Library/LaunchAgents/com.user.automaticbackups.plist
• Disable: launchctl unload -w ~/Library/LaunchAgents/com.example.app.plist

Resources

• http://www.launchd.info/
• https://www.howtogeek.com/135533/how-to-use-rsync-to-backup-your-data-on-linux/
• https://stuff-things.net/2015/03/18/backups-with-rsync-and-launchd/

com.user.automaticbackups.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>

    <key>Label</key>
    <string>com.idemchenko.automaticbackups</string>

    <key>StandardOutPath</key>
    <string>/tmp/autoBackup.stdout</string>

    <key>StandardErrorPath</key>
    <string>/tmp/autoBackup.stderr</string>

    <key>ProgramArguments</key>
    <array>
      <string>/Users/<user>/backup.sh</string>
      <string>/Volumes/Macintosh HD/Users/<user>/<path>/</string>
      <string>/Volumes/EXT HDD</string>
      <string>some/dir/on/ext/hdd</string>
    </array>

    <key>StartOnMount</key>
    <true/>

  </dict>
</plist>

script.sh

#!/bin/bash

NOW=$(date)
SRC_PATH=$1
DEST_VOLUME=$2
DEST_PATH=$3
FULL_DEST_PATH="$DEST_VOLUME/$DEST_PATH"

echo "------------------------------"
echo "Backup:.... $NOW"

echo "From:...... $SRC_PATH"
echo "To:........ $FULL_DEST_PATH"

N_FILES_TO_BACKUP=$(diff -qr "$SRC_PATH" "$FULL_DEST_PATH" | grep "$SRC_PATH" | wc -l)

echo "Found:..... $N_FILES_TO_BACKUP files to back up"

show_start_notification() {
osascript - "$N_FILES_TO_BACKUP" <<'EOF'
on run argv
  set n to item 1 of argv as integer
  display notification "Starting backup of " & n & " files" with title "Autmatic back-up"
end run
EOF
}

show_nothing_to_backup_notification() {
osascript -e 'display notification "Nothing to backup" with title "Autmatic back-up"'
}

show_finish_notification() {
osascript -e 'display notification "Backup has finished" with title "Autmatic back-up"'
}

if [ $N_FILES_TO_BACKUP -gt 0 ]
then
  mount | grep "on ${DEST_VOLUME}" > /dev/null
  if [ $? -eq 0 ]
  then
    echo "External HDD has been found"

    show_start_notification

    cp -R "$SRC_PATH" "$FULL_DEST_PATH"

    show_finish_notification
  else
    echo "No external HDD has been found"
  fi
else
  echo "Nothing to backup"
  show_nothing_to_backup_notification
fi

echo "Backup complete"
echo "------------------------------"