We decided to transition to Gradle as our build tool for all OpenSensorHub modules. We find Gradle much more flexible than Maven and build scripts easier to maintain, especially when it comes to incrementing versions of various modules in our ecosystem.
So building is now done using Gradle >3.1 rather than Maven, although we still rely on Maven repositories to fetch most of our dependencies.
For example, you can now build the core modules with the following commands:
$ git clone --recursive https://github.com/opensensorhub/osh-core.git
$ cd osh-core
$ ./gradlew build
You’ll need JDK8 (both OracleJDK or OpenJDK should work) in order to do the build yourself. Please see the Developer’s Guide for more details.