How to exclude dependency with classifier (platform version) in Gradle?

Question

In my project I have dependency on \'org.nd4j:nd4j-native-platform:0.6.0\' which brings me transitive dependencies:

• Gradle: org.nd4j:nd4j-native:linux-ppc64le:0.6.

Answer 1

I have faced the same issued. I have used a deeplearning4j library with Gradle dependency.

compile group: 'org.nd4j', name: 'nd4j-native-platform', version: '1.0.0-beta'
compile group: 'org.deeplearning4j', name: 'deeplearning4j-core', version: '1.0.0-beta'

When I use this it is also downloading other platform classifiers and its size is almost 500MB. but my use case is specific to the Windows platform so i don't need other classifiers for Linux and Android and other platforms.If I exclude the group it is also excluding the classifier for the windows also . And in Gradle as of my knowledge, we can not exclude specific classifiers.

So the question was how to remove the specific classifier. What I found strange is when I made jar file of the project and extracted jar it shows me the org.nd4j:nd4j-native:linux-ppc64le:0.6.0 and other jars but when I generate dependency tree it is not showing me the specific jar in the tree.

So in order to find out in which specific module and project the jar is coming from I made a separate maven project and with this

        org.nd4j
        nd4j-native-platform
        1.0.0-beta
    

    org.deeplearning4j
    deeplearning4j-core
    1.0.0-beta

and then I have generated a dependency tree. It showed me the jars in the dependency tree. What I did is I have removed the whole module and I have added the required classifier in a particular module with a specific version and it worked for me.

compile (group: 'org.deeplearning4j', name: 'deeplearning4j-core', version: '1.0.0-beta') 
{
exclude group: 'org.bytedeco.javacpp-presets', module: 'opencv-platform'
exclude group: 'org.bytedeco.javacpp-presets', module: 'leptonica-platform'
exclude group: 'org.bytedeco.javacpp-presets', module: 'hdf5-platform'

}
compile (group: 'org.nd4j', name: 'nd4j-native-platform', version: '1.0.0-beta')
{
    exclude group: 'org.bytedeco.javacpp-presets', module: 'openblas-platform'
}

compile group: 'org.nd4j', name: 'nd4j-native', version: '1.0.0-beta', classifier: "windows-x86_64"
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.2.20-1.4.1'
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.2.20-1.4.1', classifier: "windows-x86"
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.2.20-1.4.1', classifier: "windows-x86_64"
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.1-1.4.1'
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.1-1.4.1',classifier: "windows-x86"
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.1-1.4.1',classifier: "windows-x86_64"
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.75.3-1.4.1'
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.75.3-1.4.1',classifier: "windows-x86"
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.75.3-1.4.1',classifier: "windows-x86_64"

Doing this reduced my jar size to almost 250MB