Add ability to apply plugins in the included scripts

[imanushin]

Currently I'm unable to install plugin from the external Kotlin Script.

Expected Behavior

As project developer I can:

• Extract all common project parts to the separate scripts. For example it is better to extract plugin applying (e.g. java + kotlin) and plugin configuring (e.g. byte code version) to the separate script.
• Then include this script by line apply(file="common-java.gradle.kts")
• As a result: target project is able to use plugin, which was applied in the included file. For example: you can add line compile(group="org.jetbrains.kotlinx", name="kotlinx-coroutines-core", version="1.1.1").

Current Behavior

As project developer I can:

• Extract all common project parts to the separate scripts. For example it is better to extract plugin applying (e.g. java + kotlin) and plugin configuring (e.g. byte code version) to the separate script.
• Then include this script by line apply(file="common-java.gradle.kts")

However I could not use plugin (which is mentioned in the included file only), because the following construction is not correct (e.g. method was not found): compile(group="org.jetbrains.kotlinx", name="kotlinx-coroutines-core", version="1.1.1").

Context

I'd like to achieve:

• Extract project configuration to the include file (or to the analogue)
• Then in the target project I can include only part of files. For example:
  ** Add something like apply(file="common-java.gradle.kts") just to have project with Java support, however without artifact publication abilities.
  ** Add something like apply(file="common-server-java.gradle.kts") to have project with Java support, however this project will be published to somewhere.
  ** Include nothing: for totaly custom projects. As an example: it can be JS project (e.g. just kotlin wrappers upper to node plugin).

Steps to Reproduce (for bugs)

n/a (feature request)

Your Environment

n/a

[eskatos]

Thank you for the report @imanushin, closing as a duplicate of #1287, see in particular #1287 (comment).