Gradle Goodness: Specify Wrapper Version and Distribution Type From the Command Line
Gradle's built-in task wrapper allows others to build without needing to install Gradle itself. See how it's done and how you can incorporate it.
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Gradle has the built-in task
wrapper to create a Gradle wrapper. The Gradle wrapper can be part of our project so other people can build our project with Gradle, without the need for them to install Gradle. Also, if we specify the Gradle wrapper, we can make sure the correct Gradle version is used.
To specify the version we must use the option
--gradle-version. This version can be different than the Gradle version we use to create the Gradle wrapper. Since Gradle 3.1, we can also specify the distribution type of the Gradle wrapper. We can choose between a binary distribution or the all distribution, which contains documentation and source code. IDEs especially like to have the all distribution type so they can provide better help in their editors.
With the following
wrapper command, we create a wrapper for Gradle 3.1 and the all distribution type. For a binary distribution, we either use the value
bin or we don't specify the option, so Gradle falls back to the default value
$ gradle wrapper --gradle-version 3.1 --distribution-type all :wrapper BUILD SUCCESSFUL Total time: 1.012 secs $
We can check the file gradle/wrapper/gradle-wrapper.properties and look for the key distributionUrl. We see the value points to the correct Gradle version and distribution type.
$ more gradle/wrapper/gradle-wrapper.properties #Mon Sep 19 15:26:27 CEST 2016 distributionBase=GRADLE_USER_HOME distributionPath=wrapper/dists zipStoreBase=GRADLE_USER_HOME zipStorePath=wrapper/dists distributionUrl=https\://services.gradle.org/distributions/gradle-3.1-all.zip
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