Integrating forge gradle

Hi, im currently trying to set up forge gradle along side sponge. I’ve tried using the forgegradle thats provided in the docs but i still cant seem to import any thing from forge or net.minecraft. Here is my build.gradle

buildscript {
    repositories {
        maven {
            name = 'forge'
            url = 'https://files.minecraftforge.net/maven'
        }
    }

    dependencies {
        classpath 'net.minecraftforge.gradle:ForgeGradle:2.3-SNAPSHOT'
    }
}

plugins {
    id 'org.spongepowered.plugin' version '0.9.0'
}

dependencies {
    compile 'org.spongepowered:spongeapi:7.1.0'
    compile fileTree(dir: 'libs', include: '*.jar')
}



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

version = "1.0.0"
group = "com.future.frostTD"
description = "Tower Defense"


minecraft {
    // TODO: Configure Forge build here
    forgeVersion = '1.12.2-14.23.5.2768'
    // TODO: Replace with your mappings version, e.g. stable_39 or snapshot_20180814
    mappings = 'stable_39'
}
processResources {

    inputs.property "version", "1.0.0"
    inputs.property "mcversion", "1.12.2-14.23.5.2768"

    from(sourceSets.main.resources.srcDirs) {
        include "mcmod.info"
        expand "version": "1.0.0",  "mcversion": "1.12.2-14.23.5.2768"
    }

    from(sourceSets.main.resources.srcDirs) {
        exclude "mcmod.info"
    }
}

Nevermind, fixed the problem. Just forgot to run
gradle setupDecompWorkspace where my build.gradle was