Monitor a directory for new files, move those files out elsewhere, softlink and extract using inotifyd/incrontab, rsync (and dtrx).

sudo apt install inotify-tools incron rsync

Recommended: sudo apt install dtrx

1. Add the current user (or the preferred user) to the incron allowed users

    echo `whoami` | sudo tee -a /etc/incron.allow
   

2. Copy the script to somewhere in $PATH, like /usr/local/bin

    sudo cp ./inpile /usr/local/bin/
   

3. Mark the script as executable:

    sudo chmod a+x /usr/local/bin/inpile
   

inpile [-h] [-c <configfile>] -f <sourcedir> -s <sourcefile> -d <destination dir>

You have a directory /media/storage/synced which you would like to pull files out of into another folder /media/storage/library (and extract).

1. Create the configfile using the Example below.

2. Create a incrontab entry (incrontab -e):

    /media/storage/synced IN_CLOSE_WRITE,IN_MOVED_TO inpile -c /media/storage/sync-pause.conf -f $@ -s $@/$# -d /media/storage/library
   

3. Check syslog for changes: sudo tail -f /var/log/syslog. You may need to create a change to initiate the first sync.

4. If you do not get any updates, replace the line in incrontab -e with:

    /media/storage/synced IN_CLOSE_WRITE,IN_MOVED_TO echo "$@ $# $% $&"
   

5. Then monitor syslog for the appropriate action to monitor.

user@host:/media/storage$ tree
.
├── library
├── sync-pause.conf
└── synced
    ├── source.txt
    └── testdir
        └── test2
user@host:/media/storage$ touch synced/test.txt
user@host:/media/storage$ tree
.
├── library
│   ├── testdir
│   │   └── test2
│   └── test.txt
├── sync-pause.conf
└── synced
    ├── source.txt
    ├── testdir
    │   └── test2
    └── test.txt -> /media/storage/library/test.txt
user@host:/media/storage$ vim synced/source.txt
user@host:/media/storage$ tree
.
├── library
│   ├── source.txt
│   ├── testdir
│   │   └── test2
│   └── test.txt
├── sync-pause.conf
└── synced
    ├── source.txt -> /media/storage/library/source.txt
    ├── testdir
    │   └── test2
    └── test.txt -> /media/storage/library/test.txt

Variables able to be set in configfile:

• before: Command to run before rsync, mv, and softlink
• after: Command to run after rsync, mv, and softlink
• sourcedir (not required if passed via script argument)
• destination (not required if passed via script argument)

Variables available for use in configfile:

• $sourcefile
• $newfile
• $sourcedir (if passed via script argument)
• $destination (if passed via script argument)

before="mega-sync -s 0"
after="mega-sync -r 0; if [ '$sourcefile' != '' ]; then cd `dirname $newfile`; dtrx -r -q -n $newfile; fi;"
#destination=
#sourcedir=