unp

unp monitors a list of configured directories and automatically verifies and unpacks multi-volume RAR archives as they are written. A combination of file system events and SFV files are used to determine when archives should be unpacked.

Usage

$ unp -h
Usage of unp:
  -f string
    	Path to config file (default "~/.unprc")
  -t	Test and print config

Example config

{
  "BufferSize": 1024,
  "Paths": [
    {
      "Name": "/home/foo/videos",
      "Handler": "rar",
      "MinDepth": 4,
      "MaxDepth": 5,
      "SkipHidden": true,
      "Patterns": [
        "*.r??",
        "*.sfv"
      ],
      "Remove": false,
      "PostCommand": "mv {{.Dir}} /tmp/"
    }
  ]
}

Configuration options

BufferSize sets the maximum number of file system events to queue in memory. This should be large enough to store any events that occur while an event is processed by its handler. The default value is 1024.

Paths is an array of paths to watch.

Name is the path that should be watched.

Handler sets the handler to use. This can be either rar (default if unspecified) or script. The rar handler automatically unpacks RAR archives and uses SFV files to determine completeness. The script handler calls the specified PostCommand without any processing or completeness checks.

MinDepth sets the minimum depth allowed to trigger the handler. A MinDepth of 4 would allow files in /home/foo/videos/bar to trigger an event.

MaxDepth sets the maximum depth allowed to trigger the handler. A MaxDepth of 5 would allow files in /home/foo/videos/bar/baz to trigger an event.

SkipHidden determines whether events for hidden files (files prefix with .) should be ignored.

Patterns sets the wildcard patterns that a file needs to match to trigger an event.

Remove determines whether the handler should delete files after processing them.

PostCommand is an optional command to run after the handler processing completes.

Command templates

The following template variables are available for use in the PostCommand option:

Variable	Description	Example
Base	Basename of the file triggering the event	baz.rar
Dir	Directory holding the file	/tmp/foo/bar
Name	Full path to archive file triggering the event	/tmp/foo/bar/baz.rar

The template is compiled using the text/template package. Variables can be used like this: {{.Name}}

The working directory of PostCommand will be set to the directory where the archive is located, equal to {{.Dir}}.

Signals

unp reacts to the following signals:

SIGUSR1 triggers a re-scan which walks all configured paths and triggers its handler for any matching files that are found.

SIGUSR2 reloads configuration from disk. This can be used to watch new paths without restarting the program.