General Tips for Gradle

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Install & Upgrade Gradle¶

The latest version of gradle can be installed via PPA on Ubuntu.

:::bash
sudo add-apt-repository ppa:cwchien/gradle
sudo apt-get update

And gradle can be upgraded using the following command.

:::bash
sudo apt-get upgrade gradle

The latest version of Gradle can be installed using Homebrew on Mac.

:::bash
brew install gradle

And gradle can be upgraded using the following command.

:::bash
brew upgrade gradle

Tricks and Traps¶

You can set the default logging level to debugging by adding the following line into the file gradle.properties under the root directory of the project.
```
 org.gradle.logging.level=debug
```
It is recommended that you use the gradle wrapper gradlew to compile the project. You don’t have to use the task subcommand when using the gradle wrapper gradlew to compile the project. For example, instead of gradle task build you can use ./gradlew build.
You’d better rebuild (using the build command) your project before testing running your project or generating a fat jar (using the shadowjar command). Otherwise, you might run into weird issues such as resource file not found, etc.
You can generate a Gradle wrapper (with the given version) or update the version of an existing Gradle wrapper using the following command.
```
 :::bash
 gradle wrapper --gradle-version 6.0.1
```

The IDEA Plugin¶

You can enable the Gradle IDEA plugin by having the following line in your build.gradle file.

apply plugin: 'idea'

This plugins add a task named openIdea and allows you to import a Gradle project from command line. Sometimes, importing a project from IntelliJ IDEA does not work as expected. However, the command line always works.

./gradlew openIdea

Customize Tasks¶

https://stackoverflow.com/questions/11767713/adding-script-to-build-gradle

shadowJar for Gradle¶

plugins {
    id "com.github.johnrengelman.shadow" version "4.0.3"
}

shadowJar {
    zip64 true
    mergeServiceFiles()
    exclude "META-INF/*.SF"
    exclude 'META-INF/*.DSA'
    exclude 'META-INF/*.RSA'
    exclude "LICENSE*"
}