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Debugging a third party gradle plugin
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README.md

A third party Gradle plugin can be difficult to debug. In my case, I couldn't figure out why an input in my build.gradle file wasn't causing the plugin to add a desired task to a build. It's also not straightforward to inspect the source code of a plugin that arrives prebuilt. Fortunately if the plugin is open source, you can breakpoint in the source.

This thread forms the basis of these steps:

  • clone the source code for the plugin, and checkout the commit or version tag reflecting the version of the plugin you want to debug
  • open the repo in IntelliJ IDEA / Android Studio and allow gradle to sync
  • create a run configuration, selecting Attach to Remote JVM
  • make your breakpoints in the source code
  • in the project with the gradle build you want to debug, run ./gradlew --no-daemon -Dorg.gradle.debug=true app:uploadBugsnagReleaseSourceMaps, gradle will wait for a debugger to attach
  • back in the source code repo for the plugin, hit Debug
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