Rules on Dripline Documentation

First look

Wed, 16 Sep 2020 22:38:02 +0200

First look

Driplane include a simple language to define where to get the stream and what operation to exec, or how to filter the data.

In the rule could be defined 3 type of nodes:

FEEDER : it is the node responsible for creating of a stream of data (it reads every changes on a file, gets tweets from Twitter, etc..)
FILTER : it receives data from a feeder or another filter and checks some conditions on them or makes some changes on them. It sends the data to the next filter ONLY if the condition is verified.

Syntax

Wed, 16 Sep 2020 22:38:02 +0200

Syntax

The syntax of the driplane’s rules is very simple. As for the BASH every filter’s output is sent to the next filter’s input concatenating the two of them with the | character.
All the rules have to start with a name and end with a ; char.

Import

Using the directive import it is possible to include one or more files and their rules in another one. All the rules defined in an included file
are available for the file that imports them.

Templates

Fri, 17 Apr 2026 00:00:00 +0000

Templates

Many filters in driplane support Go templates in their parameters. Templates allow you to dynamically compose strings using the fields of the current Message (both the main field and any extra fields).

Templates are based on the standard Go text/template package and are extended with all the functions from the Sprig library, giving you access to over 100 useful functions for string manipulation, math, date formatting, encoding, and more.

Basic syntax

Inside a template, you can reference any field of the Message using the {{ .field_name }} syntax: