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Gradle Effective Implementation Guide

Cover of Gradle Effective Implementation Guide by Hubert Klein Ikkink Published by Packt Publishing
  1. Gradle Effective Implementation Guide
    1. Table of Contents
    2. Gradle Effective Implementation Guide
    3. Credits
    4. About the Author
    5. Acknowledgement
    6. About the Reviewers
    7. www.PacktPub.com
      1. Support files, eBooks, discount offers and more
    8. Preface
      1. What this book covers
      2. What you need for this book
      3. Who this book is for
      4. Conventions
      5. Reader feedback
      6. Customer support
    9. 1. Starting with Gradle
      1. Introducing Gradle
      2. Getting started
      3. Writing our first build script
      4. Default Gradle tasks
      5. Task name abbreviation
      6. Executing multiple tasks
      7. Command-line options
      8. Understanding the Gradle user interface
      9. Summary
    10. 2. Creating Gradle Build Scripts
      1. Writing a build script
      2. Defining tasks
      3. Build scripts are Groovy code
      4. Defining dependencies between tasks
      5. Setting default tasks
      6. Organizing tasks
      7. Adding tasks in other ways
      8. Accessing tasks as project properties
      9. Adding additional properties to tasks
      10. Avoiding common pitfalls
      11. Skipping tasks
      12. Summary
    11. 3. Working with Gradle Build Scripts
      1. Working with files
      2. Project properties
      3. Using logging
      4. Using the Gradle wrapper
      5. Summary
    12. 4. Using Gradle for Java Projects
      1. Using plugins
      2. Getting started
      3. Using the Java plugin
      4. Working with source sets
      5. Working with properties
      6. Creating documentation
      7. Assembling archives
      8. Summary
    13. 5. Dependency Management
      1. Dependency configuration
      2. Repositories
      3. Defining dependencies
      4. Summary
    14. 6. Testing, Building, and Publishing Artifacts
      1. Testing
      2. Running Java applications
      3. Publishing artifacts
      4. Packaging Java Enterprise Edition applications
      5. Summary
    15. 7. Multi-project Builds
      1. Working with multi-project builds
      2. Working with Java multi-project builds
      3. Using the Jetty plugin
      4. Summary
    16. 8. Mixed Languages
      1. Using the Groovy plugin
      2. Using the Scala plugin
      3. Summary
    17. 9. Maintaining Code Quality
      1. Using the Checkstyle plugin
      2. Using the PMD plugin
      3. Using the FindBugs plugin
      4. Using the JDepend plugin
      5. Using the CodeNarc plugin
      6. Using the Sonar plugin
      7. Summary
    18. 10. Writing Custom Tasks and Plugins
      1. Creating a custom task
      2. Creating a task in the project source directory
      3. Creating a task in a standalone project
      4. Creating a custom plugin
      5. Creating a plugin in the project source directory
      6. Creating a plugin in a standalone project
      7. Summary
    19. 11. Using Gradle with Continuous Integration
      1. Creating a sample project
      2. Using Jenkins
      3. Using JetBrains TeamCity
      4. Using Atlassian Bamboo
      5. Summary
    20. 12. IDE Support
      1. Using the Eclipse plugin
      2. Using the IntelliJ IDEA plugin
      3. Running Gradle in Eclipse
      4. Running Gradle in IntelliJ IDEA
      5. Summary
    21. Index
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Skipping tasks

Sometimes, we want tasks to be excluded from a build. In certain circumstances, we just want to skip a task and continue executing other tasks. We can use several methods to skip tasks in Gradle.

Using onlyIf predicates

Every task has a method onlyIf that accepts a closure as an argument. The result of the closure must be true or false. If the task must be skipped, the result of the closure must be false, otherwise the task is executed. The task object is passed as a parameter to the closure. Gradle evaluates the closure just before the task is executed.

The following build file will skip the task longrunning, if the file is executed during weekdays, but will execute it during the weekend:

import static java.util.Calendar.* task longrunning ...

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