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.

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

And gradle can be upgraded using the following command.

sudo apt-get upgrade gradle

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

brew install gradle

And gradle can be upgraded using the following command.

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.
```
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*"
}

Shadow

archiveClassifier

https://github.com/johnrengelman/shadow/issues/463#event-2615996541

Gradle Sync

support only local sync
not incremental

Overall it is far behind rsync. I'd rather use rsync in shell.

Gradle SSH Plugin

https://gradle-ssh-plugin.github.io/

I'd rather use ssh/rsync in shell.

Gradle Home for IntelliJ IDEA

/usr/local/Cellar/gradle/5.1/libexec/ https://stackoverflow.com/questions/18495474/how-to-define-gradles-home-in-idea/34502612

Specifying Dependencies

https://docs.gradle.org/current/userguide/java_library_plugin.html#sec:java_library_configurations_graph

https://stackoverflow.com/questions/44493378/whats-the-difference-between-implementation-and-compile-in-gradle

References

https://askubuntu.com/questions/932083/how-do-i-upgrade-gradle

https://ftclausen.github.io/general/gradle_sync_task_is_not_incremental/

https://docs.gradle.org/current/userguide/upgrading_version_4.html