Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Gradle Command-Line Conveniences

DZone's Guide to

Gradle Command-Line Conveniences

· DevOps Zone
Free Resource

Download “The DevOps Journey - From Waterfall to Continuous Delivery” to learn about the importance of integrating automated testing into the DevOps workflow, brought to you in partnership with Sauce Labs.

In my post A First Look at Building Java with Gradle, I briefly mentioned using Gradle's "gradle tasks" command to see the available tasks for a particular Gradle build. In this post, I expand on that brief mention a bit more and look at some related Gradle command-line conveniences.

Gradle makes it easy to determine available Gradle tasks for a given project. The next screen snapshot demonstrates using gradle tasks (or gradle :tasks) in the same directory as the simple Gradle build file (build.gradle) I used in my previously mentioned Gradle post. The screen snapshots follow the code listing of build.gradle which is reproduced here for convenience.

Basic Java Application build.gradle

apply plugin: 'java'  

Adding --all to gradle tasks (gradle tasks --all) will show even more details (including tasks' dependencies) as shown in the next screen snapshot.

Something I used to do often when working with an Ant build file new to me was to add a target "showProperties" that used a series of Ant echo tasks to display the properties used by that build file. Gradle provides essentially this capability out-of-the-box. The next screen snapshot demonstrates use of gradle -q properties to display the properties associated with the Gradle project and tasks in the build.gradle file in the same directory.

Another useful command-line Gradle option is --profile. This can be used in conjunction with running a Gradle command. For example, gradle tasks --profile generates the same standard output as shown above, but also writes build performance statistics to a file with the naming convention profile-YYYY-MM-DD-HH-mm-ss.html in the build/reports/profile subdirectory of the directory from which the build was executed. An example of that generated file is shown next.

The final Gradle command-line option I cover in this post is the "dry run" option -m (or --dry-run). This option allows one to see the Gradle tasks which are run and the order in which they are run without actually executing those tasks. Because the one-line Gradle build.gradle file used in this post applies the Java plugin, the automatically added Gradle Tasks include compileJavaclassesjar, and javadoc. The following screen snapshot demonstrates running gradle -m jar to see the dry run output that shows the dependent tasks that must be run before "jar" and the order they must be run (compileJava->processResources->classes->jar). Note "SKIPPED" notation indicating that the Gradle tasks are not actually executed.

Chapter 11 ("Using the Gradle Command-Line") of the Gradle User Guide (PDF) contains additional details regarding use of Gradle's command-line interface with sections on listing projectslisting taskslisting project dependencieslisting project properties, and listing the order Gradle tasks are executed.

Discover how to optimize your DevOps workflows with our cloud-based automated testing infrastructure, brought to you in partnership with Sauce Labs

Topics:

Published at DZone with permission of Dustin Marx, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

THE DZONE NEWSLETTER

Dev Resources & Solutions Straight to Your Inbox

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.

X

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}