Gradle copy build script dependency to folder - gradle

Question

We are building one of our applications with gradle and part of the distribution I want to include an external jar which is not a run time dependency in a config folder. That jar is needed as part of the application install and it contains some custom ant tasks.
Our build script dependency looks like below:
buildscript {
...
dependencies {
classpath 'org.jfrog.buildinfo:build-info-extractor-gradle:3.1.1'
classpath 'my-group:custom-tasks:1.2.3'
}
}
How would I access and copy the custom-task-1.2.3.jar into a certain folder so I can include it in my distribution? Something like below:
task copyCustomTasks {
doLast {
copy {
// This below is a make up to express what I want
from buildscript.dependencies
include 'custom-tasks*.jar'
into "$buildDir/config"
}
}
}
If this is not the gradle way of doing things please let me know what alternatives I have.
Thank you in advance for your help.
UPDATE
I solved my problem in a different way by creating an extra configuration. However I would still be interested to find out how you can access build script dependencies at run time. Thanks again for your inputs.
configurations {
install {
description = "application install classpath"
transitive = true
}
}
...
dependencies {
...
install('my-group:custom-tasks:1.2.3')
...
}
...
task copyInstallDeps {
doLast {
copy {
from configurations.install
into "$buildDir/config"
}
}
}

Answer 1

You're quite close:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.google.guava:guava:18.0'
}
}
task copyLibs(type: Copy) {
from buildscript.configurations.classpath
into 'lib'
}