IntelliJ IDEA provides Gant
support.
IntelliJ IDEA recognizes *.gant files, and allows editing them.
In this section:
Prerequisites
Before you start working with Gant files, make sure that:
- Gant is downloaded and installed on your computer.
Gant support
Gant files are marked with 
icon.
Gant support includes:
- Code completion for Gant tasks.
- Execution of a whole script.
- Selective run of the individual targets.
- Groovy script run/debug configuration.