Migrating from Maven to Gradle

I've started to work on a large project, few years old, about 100 developers and millions of lines of code. The project is a web application deployed both to difference clouds and on-prem. Everything is built with Maven and take, IMHO, way to much time to build.

After a few month of working with it, we've decided to migrate the project from Maven to Gradle. It was actually easier than I thought to convince stack holders to do it, but it still takes longer than I thought it will take.

I'll post problems we've run into and how we solved them, I think it can help others who decide to migrate from Maven to Gradle.

Here are some of the things we had to deal with:

• Migrating Java libraries
• Migrating Maven Plugins
• Building war projects
• Doing war overlay
• Building docker images
• Building RPM files
• Run Webpack and grunt
• Run unit tests and integration tests
• Migrate or adjust the CI process for Gradle
• Migrate maven-assembly-plugin