Building and Testing with Gradle: Understanding by Tim Berglund, Matthew McCullough

By Tim Berglund, Matthew McCullough

Construct and try out software program written in Java and lots of different languages with Gradle, the open resource venture automation instrument that is getting loads of awareness. This concise advent offers a variety of code examples that can assist you discover Gradle, either as a construct software and as a whole answer for automating the compilation, try, and unencumber strategy of basic and enterprise-level purposes. become aware of how Gradle improves at the most sensible rules of Ant, Maven, and different construct instruments, with criteria for builders who wish them and many flexibility in the event you want much less constitution.

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Finally we looked at how to write tasks of your own. Gradle’s built-in tasks and plugins are enough for many users to script their builds without any custom code, but not always. One of Gradle’s fundamental sensibilities is that it should be easy for you to extend your build without cluttering your build scripts with a lot of unmaintainable Groovy code. The custom task examples we looked at illustrated this. Tasks are the basic unit of build activity in Gradle. There is more to their story than an introduction can cover, but with this chapter under your belt, you’re well prepared to start using them and to continue learning about them.

Example 2-31. fileManifest}" } Example 2-32. info Task Types As we discussed in “Tasks Are Objects” on page 16, every task has a type. Besides the DefaultTask, there are task types for copying, archiving, executing programs, and many more. Declaring a task type is a lot like extending a base class in an object-oriented programming language: you can get certain methods and properties available in your task for free. This makes for very concise task definitions that can accomplish a lot. A complete task reference is beyond the scope of this volume, but here are a few important types with an example of how to use each.

Intended to communicate build failures. println will not show up in the console. Example 2-27. A task illustrating the effects of each logging level. This slightly trickier Groovy code sets the log level to each of the valid options, attempting to emit a log message at each log level each time. error ' ' } } Example 2-28. The output generated by the preceding build file. info INFO ENABLED LIFECYCLE ENABLED WARN ENABLED QUIET ENABLED ERROR ENABLED SETTING LogLevel=LIFECYCLE -------------------------LIFECYCLE ENABLED WARN ENABLED QUIET ENABLED ERROR ENABLED SETTING LogLevel=QUIET ---------------------QUIET ENABLED ERROR ENABLED SETTING LogLevel=WARN --------------------WARN ENABLED ERROR ENABLED SETTING LogLevel=ERROR ---------------------ERROR ENABLED $ logging The logging property gives us access to the log level.

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