Using Apache Commons Math in my mod

[Asweez]

I want to use the math library from apache commons. However, just including it in the build path doesn't include it in the build. I don't want to just use the sources in my mod because that could create compatibility issues (I'm assuming some other mods use commons math). How do I include it in my build?

[Ernio]

JarShadow. Same way you include APIs.

[shadowfacts]

Same way as how I told you in your previous thread about shading. Use the Shadow plugin, tell it to include you're version of Commons Math and tell it to relocate it to a package inside your mod package.

 

You can see an example of this here.

[Asweez]

So would I just use

relocate "org.apache.commons.math3", "my package here"

?

 

If so, where do I put the org.apache.commons.math3, and when I relocate it into my package in my mod, how do I make my mod files reference Commons Math when it hasn't been relocated to that package yet (in the dev environment)?

 

Thanks

[shadowfacts]

Yes, what i usually do is:

 

relocate "org.apache.commons.math3", "your.mod.package.repack.org.apache.commons.math3"

 

The whole point of having the

relocate

function is that it both moves the files and updates all the references in your code and in the other library.

[Asweez]

Thanks!

 

I still get a NoClassDefFoundError for org.gradle.api.plugins.JavaPlugin, is there something else I need to do?

 

build.gradle

 

buildscript {
    repositories {
        jcenter()
        maven {
            name = "forge"
            url = "http://files.minecraftforge.net/maven"
        }
    }
    dependencies {
            classpath 'net.minecraftforge.gradle:ForgeGradle:1.2-SNAPSHOT'
    }
}

plugins{
    id "com.github.johnrengelman.shadow" version "1.2.2"
}

apply plugin: "net.minecraftforge.gradle.forge"

version = "1.0"
group= "com.apmods.hpspells" // http://maven.apache.org/guides/mini/guide-naming-conventions.html
archivesBaseName = "hpspells"

minecraft {
    version = "1.7.10-10.13.4.1614-1.7.10"
    runDir = "eclipse"
}

processResources
{
    inputs.property "version", project.version
    inputs.property "mcversion", project.minecraft.version

    from(sourceSets.main.resources.srcDirs) {
        include 'mcmod.info'
                
        expand 'version':project.version, 'mcversion':project.minecraft.version
    }
        
    from(sourceSets.main.resources.srcDirs) {
        exclude 'mcmod.info'
    }
}

shadowJar{
    relocate "org.apache.commons.math3", "com.apmods.hpspells.repack.org.apache.commons.math3"
}

 

[shadowfacts]

Make sure you're using the latest version of Gradle and the latest version of Shadow.

[Asweez]

To update grade would I use the latest version of ForgeGradle?

[shadowfacts]

No, you would install the latest version of Gradle from the Gradle site and run

gradle wrapper

.

[Asweez]

Where do I install the newest version of Gradle?

 

[Asweez]

Ok, I updated gradle to version 2.12 and that is working, however when I run

gradlew build

it comes up with this error.

 

> Failed to apply plugin [class 'com.github.jengelman.gradle.plugins.shadow.ShadowJavaPlugin']
   > Could not create task of type 'ShadowJar'.

 

 

Here is my build.grade, what am I doing wrong?

 

buildscript {
    repositories {
        jcenter()
        maven {
            name = "forge"
            url = "http://files.minecraftforge.net/maven"
        }
        maven {
            name = "sonatype"
            url = "https://oss.sonatype.org/content/repositories/snapshots/"
        }
    }
    dependencies {
        classpath 'net.minecraftforge.gradle:ForgeGradle:1.2-SNAPSHOT'
    }
}

plugins{
id "com.github.johnrengelman.shadow" version "1.2.2"
}

apply plugin: 'java'
apply plugin: "com.github.jengelman.gradle.plugins.shadow"
apply plugin: 'forge'

version = "1.0"
group= "com.apmods.hpspells" 
archivesBaseName = "hpspells"

minecraft {
    version = "1.7.10-10.13.4.1558-1.7.10"
    runDir = "eclipse"
}

dependencies {
    // you may put jars on which you depend on in ./libs
    // or you may define them like so..
    //compile "some.group:artifact:version:classifier"
    //compile "some.group:artifact:version"
      
    // real examples
    //compile 'com.mod-buildcraft:buildcraft:6.0.8:dev'  // adds buildcraft to the dev env
    //compile 'com.googlecode.efficient-java-matrix-library:ejml:0.24' // adds ejml to the dev env

    // for more info...
    // http://www.gradle.org/docs/current/userguide/artifact_dependencies_tutorial.html
    // http://www.gradle.org/docs/current/userguide/dependency_management.html

}

processResources
{
    // this will ensure that this task is redone when the versions change.
    inputs.property "version", project.version
    inputs.property "mcversion", project.minecraft.version

    // replace stuff in mcmod.info, nothing else
    from(sourceSets.main.resources.srcDirs) {
        include 'mcmod.info'
                
        // replace version and mcversion
        expand 'version':project.version, 'mcversion':project.minecraft.version
    }
        
    // copy everything else, thats not the mcmod.info
    from(sourceSets.main.resources.srcDirs) {
        exclude 'mcmod.info'
    }
}

shadowJar{
    relocate "org.apache.commons.math3", "com.apmods.hpspells.repack.org.apache.commons.math3"
}

 

[Asweez]

Ah, silly mistake, it was a bug in version 1.2.2 of shadowJar, I updated to 1.2.3 and it was fixed.

 

However, now when I run it it throws several errors because it can't find any of the apache commons math classes. My build.gradle is posted above. I have added apache commons math3 as an external jar to Minecraft's build path. Any help would be appreciated.

 

Thanks

[shadowfacts]

You need to include commons math as a Maven dependency and tell Shadow to include it in your jar, otherwise the relocate bit doesn't do anything.

[Asweez]

Thanks! That worked. Here is my build.grade for anyone wondering.

 

buildscript {
    repositories {
        jcenter()
        maven {
            name = "forge"
            url = "http://files.minecraftforge.net/maven"
        }
        maven {
            name = "sonatype"
            url = "https://oss.sonatype.org/content/repositories/snapshots/"
        }
    }
    dependencies {
        classpath 'net.minecraftforge.gradle:ForgeGradle:1.2-SNAPSHOT'
    }
}

plugins{
id "com.github.johnrengelman.shadow" version "1.2.3"
}

apply plugin: 'java'
apply plugin: 'forge'

version = "1.0"
group= "com.apmods.hpspells" 
archivesBaseName = "hpspells"

minecraft {
    version = "1.7.10-10.13.4.1558-1.7.10"
    runDir = "eclipse"
}

dependencies {
    compile group: "org.apache.commons", name: "commons-math3", version: "3.2"
}

processResources
{
    inputs.property "version", project.version
    inputs.property "mcversion", project.minecraft.version

    from(sourceSets.main.resources.srcDirs) {
        include 'mcmod.info'
                
        expand 'version':project.version, 'mcversion':project.minecraft.version
    }
        
    from(sourceSets.main.resources.srcDirs) {
        exclude 'mcmod.info'
    }
}

shadowJar{
    relocate "org.apache.commons.math3", "com.apmods.hpspells.repack.org.apache.commons.math3"
}