How to create izpack installer with gradle

Overview

Before you create the izpack installer file you have to to set the property 'createIzPackInstaller' to true(in the project gradle.properties file) and then execute the clean and the build task process with gradle. This process will generate the jar files in the directory 'mystic-crypt-ui/build/libs' and the signed jar files in the directory 'mystic-crypt-ui/build/signed*. Now we can run the 'izPackCreateInstaller' task that will automatically get the signed jar file and generate the installation jar file in the projects distributions directory 'mystic-crypt-ui/build/distributions'. The generated signed installation jar file can now be deployed for installation to any OS.

For more detailed information see the izpack task in the build.gradle file or go direct to the gradle izpack plugin page

Notes

Since version 6 the build.gradle file is splitted in several section gradle files. One of them is the 'izpack.gradle' file. This file contains the izpack task. In the packaging.gradle are the tasks for generate the jar, signed jar and withAllDependenciesJar.

Trouble shooting

If no installation jar file is generated, see if the property 'createIzPackInstaller' is set to true

If the following error comes

Execution failed for task ':jar'.
> Could not get unknown property 'release.mystic-crypt.key.alias' for root project 'mystic-crypt-ui' of type org.gradle.api.Project.

This error means that the property 'release.mystic-crypt.key.alias' for the keystore is not set. In the gradle.properties they are the following properties for the keystore:

##############################
# keystore properties keys   #
##############################
mysticCryptStoreFile=release.mystic-crypt.store.file
mysticCryptStoreType=release.mystic-crypt.store.type
mysticCryptStorePassword=release.mystic-crypt.store.password
mysticCryptKeyPassword=release.mystic-crypt.key.password
mysticCryptKeyAlias=release.mystic-crypt.key.alias

The follow the same pattern as described in this article

izpack migration to izpack 5

The project is migrated to to new major version izpack 5.x.

Versions before 6.x uses old version izpack 4.x