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Gradle Cobertura Plugin
Groovy Java
Pull request Compare This branch is 119 commits ahead, 2 commits behind valkolovos:master.


See the Usage page for complete details on how to use this plugin.


March 2, 2015

At long last, Cobertura has released version 2.1, with thanks to Dennis Lundberg. As a result, the Gradle Cobertura plugin now uses version 2.1.1 of Cobertura by default. This version should play better with Java 8 and fix several of the issues users were having. As part of this release, I've bumped the version of Groovy that the plugin uses. This can cause issues in Gradle 1.x. The workaround is to add classpath 'org.codehaus.groovy:groovy-backports-compat23:2.3.5' to the buildscript dependencies.

October 12, 2014

The Cobertura plugin now supports Cobertura 2.1, and is a part of Gradle 2.1's plugin repository. See the Usage page for more details.

June 11, 2014

Gradle has made the first 2.0 release candidate available, and it looks like the cobertura plugin works fine with Gradle 2.0.

February 25, 2014:

Note: This plugin will not work with Cobertura 2.0.4 snapshots at this time. All of the Cobertura classes that are called by this plugin have been renamed by the Cobertura team. I'm currently working with the Cobertura team on this issue.

Added suAdded support for customizing the auxiliary classpath, with thanks to Harald Schmitt

December 08, 2013:

A special thank you to John Engelman for his help with the 2.2.0 release.

The biggest changes in this release are the behavior of the cobertura task, the addition of the checkCoverage task, and support for merging datafiles before generating coverage reports. See the CHANGELOG for the full details, but the main thing is that applying the cobertura plugin to a project no longer changes anything in the task graphs of other projects in a multi-project build.

There were also a lot of options added to the cobertura extension, so you may want to have a look there as well.

October 27, 2013:

Note: If you have been using the coverageDatafile property in your cobertura block, you'll need to change it to coverageOutputDatafile, and you will probably want to add a coverageInputDatafile as well.

Version 2.1.0 Has several important changes. See the CHANGELOG for the full details, but there 4 main changes that are important:

  1. The cobertura task works a little differently than it did before. See the Usage page for more details.

  2. There is a new coberturaReport task that allows finer control over which tests actually run. See the Usage page for more details

  3. Instrumentation now happens only when it needs to, such as when the source code changes, or one of the options in the cobertura block of your build.gradle changes.

  4. The plugin now has better support for projects that use Groovy and Scala, but the groovy and scala plugins need to be applied before the cobertura plugin.

September 2013:

Version 2.0.0 only works with Gradle 1.7 and newer. If you are on an older version of gradle, you should use the latest 1.x release of this plugin.

Version 2.0.0 uses new features of Gradle 1.7 and removed deprecation warnings. It also changed the dependencies slightly so that running gradle cobertura executes all the tests in a multi-project build, similar to what gradle test does.

Version 1.2.0 Added support for Cobertura 2.0, which introduced some new features. Best among them are 2 new options, ignoreTrivial and ignoreMethodAnnotation, each of which are described in the usage section below. It also fixes some new issues found in multi-project builds.


This plugin was inspired by the Cobertura plugin by valkolovos and jvanderpol. This plugin is an improvement over the the original in a few important ways.

  • The biggest difference is that this fork of the plugin runs a Cobertura coverage report even if tests fail. If there are multiple test tasks, it will run the cobertura reports after the last test task that ran. Note that if there is a test failure other test tasks won't necessarily run. This is consistent with Gradle's behavior when running multiple testing tasks.

  • Per, I've replaced conventions with extensions.

  • This plugin supports Cobertura's coverage check and merge functions.

  • Version 2.0 works with Gradle 1.7 and above. Version 1.2 works with Gradle 1.0 through 1.6. They both take advantage of features introduced in Cobertura version 2.0.

  • I've worked a lot with build lifecycle to make sure that things only happen if they need to happen, and when they need to happen. For example, we only instrument code if the user wanted to generate coverage reports, and then it instruments right before the tests run so that time is not spent instrumenting if the build fails due to some earlier error.

  • This plugin is published and available on Maven Central, separating use of the plugin from the source tree on GitHub.

  • Most importantly, this plugin is clearly licensed as an Apache 2.0 licensed project so users can use this plugin as part of any project they are building.


This is still a work in progress. If anyone would like to help out, here are a few things I'm still trying to accomplish.

  • This plugin needs some robust unit tests. The testclient directory has a little java project that I use to manually test different scenarios, but we could really use some proper unit tests.

  • Did I mention testing? :-) As issues are resolved, it would great if I could have unit tests that made sure that things fixed for prior issues are still fixed. This is becoming more important as I do more work with multi project builds and multi language projects.


To build this plugin from source use the following command:

./gradlew install

This will create a local jar and put it in your local maven repository. you can reference it in your builds like this:

buildscript {
    repositories {
    dependencies {
        classpath 'net.saliman:gradle-cobertura-plugin:2.2.9-SNAPSHOT'
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