How to run copy task to add js files in build/classes after IDE(intellj) compile/make project

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Hi all and thanks for taking time to help in advance. This is the first question I’m posting so please do let me know if this can be improved.
I’m a newbie to gradle and this is my first project. I have gradle.build included at the bottom which downloads tar from nexus repo and then i have tasks to untar and copy the files to $buildDir/classes/main/static/sisplayer. Then i have awar.dependsOn copyPlayer to have the files ready to be added to it. The problem is that i can get to files to be included in the war to work on server and have bootRun{}.dependsOn copyPlayer to have the files before running the app by gradle bootRun but i dont get the files when i run the app on intellij using the main class. I assume i need to hook up the task to be executed before project is compiled so i tried

compileJava.dependsOn copyPlayer
but that is giving out error. I’ve also tried to to use hooks like

gradle.projectsEvaluated {
    preBuild.dependsOn copyPlayer
}

as suggested in here but that’s also comes out with an error. can someone please help. Ive tried to look up but couldn’t find a solution.

Also are there other thing in the config that I can improve as this is my first gradle project. The whole config is as under.

buildscript {
ext {
    springBootVersion = '1.4.1.RELEASE'
}
repositories {
    mavenCentral()
    maven {
        url "https://plugins.gradle.org/m2/"
    }
}
dependencies {
    classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    classpath 'org.springframework:springloaded:1.2.6.RELEASE'
}
}


plugins {
id "org.sonarqube" version "2.2.1"
id "net.saliman.cobertura" version "2.3.2"
}

apply plugin: 'java'
apply plugin: 'eclipse-wtp'
apply plugin: 'idea'
apply plugin: 'spring-boot'
apply plugin: 'war'

sourceCompatibility = 1.8
targetCompatibility = 1.8
def playerVersion= "0.4.0-36"
idea {
module {
    inheritOutputDirs = false
    outputDir = file("$buildDir/classes/main/")
}

}

war {

baseName = 'streaming_demo'
version = '0.0.1-SNAPSHOT'
from("$buildDir/classes/main/static/jsplayer"){
    into("WEB-INF/classes/static/jsplayer")
}

}

repositories {
maven {
    url "http://example.com:6590/nexus/content/repositories/frontend-artifacts"
}

maven {
    url "example.com:6590/nexus/content/groups/public/"
}
maven {
    url "http://example.com:6590/nexus/content/repositories/releases/"
}
maven {
    url "http://example.com:6590/nexus/content/repositories/thirdparty/" 
}
maven { url "http://oss.sonatype.org/content/repositories/snapshots/"
}

mavenCentral()
}

configurations {
    jsPlayer
    providedRuntime
}
dependencies {
//  compile group: 'javax.el', name: 'javax.el-api', version: '2.2.4'
    sisPlayer "com.example:jsplayer:$playerVersion@tar.gz"
    compile('org.springframework.boot:spring-boot-starter-data-jpa')
    compile('org.springframework.boot:spring-boot-devtools')
    compile('org.springframework.boot:spring-boot-starter-jdbc')
    compile('org.springframework.boot:spring-boot-starter-web') {
        exclude module: "spring-boot-starter-tomcat"
    }
    compile('org.springframework.boot:spring-boot-starter-web-services')
    compile("org.springframework.boot:spring-boot-starter-thymeleaf")
    compile("org.springframework.boot:spring-boot-starter-security")
    compile("org.thymeleaf.extras:thymeleaf-extras-springsecurity4")
    runtime 'mysql:mysql-connector-java:5.1.24'
    compile 'com.microsoft.sqlserver:sqljdbc41:4.1'

    runtime('com.h2database:h2')
testCompile('org.springframework.boot:spring-boot-starter-test')

//  dependencies for using Spock
compile "org.codehaus.groovy:groovy-all:2.4.1"
testCompile "org.spockframework:spock-core:1.0-groovy-2.4"

testRuntime "cglib:cglib-nodep:3.1"          // allows mocking of 

classes (in addition to interfaces)
    testRuntime "org.objenesis:objenesis:2.1"
    // allows mocking of classes without default constructor (together with CGLIB)
}
task wrapper(type: Wrapper) {
    gradleVersion = '3.1'
}
task extractPlayer(type: Copy){
    from tarTree(configurations.jsPlayer.singleFile)
    into "$buildDir/testplayerDownload/"

}
task copyPlayer(type: Copy) {
    dependsOn extractPlayer
    from "$buildDir/testplayerDownload/dist"
    into "$buildDir/classes/main/static/jsplayer"
    doLast {
        delete("$buildDir/testplayerDownload/")
    }
}

build{}.doLast{
    tasks.extractPlayer.execute()
    tasks.copyPlayer.execute()
}

war.dependsOn copyPlayer

bootRun {}.dependsOn copyPlayer

gradle.projectsEvaluated {
    preBuild.dependsOn copyPlayer
}
 cobertura {
    coverageFormats = ['xml']
}