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Idiomatic Gradle Plugins

25 Recipes for Authors

Schalk Cronjé

Write Gradle plugins in a form that extends the Gradle DSL in a readable and gradlesque way. Make it easy for consumers of the plugins to adopt it in their build scripts. These recipes provide a common ground for users as well as maintainers of a plugin.

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About

About

About the Book

A key consideration when writing a plugin is aesthetics and readability. The DSL must read like a description,not appear to be someone writing a Groovy program. This leads to easier adoption of both the plugin and Gradle in general as a build tool. This form of expressiveness sometimes referred to a being `gradlesque`, is key to producing a good plugin. All of the idioms in this book are presented in Groovy. Although it is possible to write plugins in other JVM languages, Groovy providesthe easiest and most readable medium for implementing plugins. This book also assumes a minimum Gradle version of 2.0 and that the reader can program in Groovy. All examples in the book have been tested with all major Gradle releases from 2.0 through to the latest 4.x release.

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SoftwareComputers and ProgrammingDevOps

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About the Author

Schalk Cronjé

Schalk Cronjé is an international product delivery coach. With his A-skill profile he brings an unique user-centric approach to software delivery at both a business and technical levels. e is well known and very active in the Gradle and Groovy communities. He has authored or contributed to a number of Gradle plugins. He is also the author of the well known Groovy VFS library. He also serves on the international steering committee of the Agile Testing Alliance.

Contents

Table of Contents

Preface

  1. Getting Started

Basic Build Script

Build for Wide Gradle Compatibility

Avoiding Groovy Version Mismatch

Maintain JDK Compatibility

Change transitive dependency of plugin

  1. Testing Plugins

Disable Network Tests When Offline

Compatibility Testing

  1. Expressive Task Configuration

Expressive Single File

Collection of Files

Collection of Strings

Property Maps

Advanced Property Maps

Include Files Using Patterns

  1. Plugin Dependencies

Allow user to override specific version of underlying in-process library

Default Repositories

  1. Working with SourceSets

Add Generated Files to Existing JVM Sourceset

Add Source Set for Existing JVM Language

  1. Adding New JVM Languages

Add SourceSet Support for JVM Language

Add Assemble Task Support for JVM Language

Add Source Layout Conventions for JVM Language

Add Documentation Task for JVM Language

  1. Miscellaneous

Create Safe Filenames From Inputs

Honour Offline

Self-referencing plugin

Operating System

Bibliography

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