I just ran gradle with this build.gradle:

 

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buildscript {

    repositories {

        mavenCentral()

        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:1.1-SNAPSHOT'

    }

}

 

apply plugin: 'forge'

 

version = "1.7.2-1.0"

group= "com.darkfangsmod.darkfangsblocks" // http://maven.apache.org/guides/mini/guide-naming-conventions.html

archivesBaseName = "darkfangsmod"

 

minecraft {

    version = "1.7.2-10.12.0.1024"

    assetDir = "eclipse/assets"

}

processResources

{

    // 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'

    }

}

 

and it worked fine. However, I want it to also export the assets, which are in the package assets.darkfangsmod.textures and assets.darkfangsmod.language, like they have to be. How can I get these to export into the right place for use outside of the development environment?

That's what the resources folder is for. Put them in there.