gradle - Add custom configuration to installDist for a specific task - gradle

Question

I'm trying to make a custom runtime dependency configuration, so that the specified dependencies will only be installed for a specific task. The dependencies are installed using the installDist task. So it seems like I need the configuration to be added to the runtimeClasspath for one task and not the other. I'm thinking I need a custom distribution, but I'm not sure how to set that to have a different runtimeClasspath.
In the example below, I want the run2 task to have the myRuntimeDep dependencies installed, but for the run1 task I do not.
I've be struggling to figure this out all day, does someone know what I'm missing?
Example build.gradle:
configurations {
myRuntimeDep.extendsFrom runtimeOnly
}
dependencies {
...
myRuntimeDep 'the:dependency:1.0'
}
task run1(type: JavaExec, dependsOn: installDist) {
// does not need myRuntimeDep dependencies
}
task run2(type: JavaExec, dependsOn: installDist) {
// needs myRuntimeDep dependencies
}

Answer 1

So after a long weekend, I sort of got something working. Maybe someone can tell me if there's a better way? Also, it doesn't fully work because it doesn't follow transitive dependencies with the configuration (which is kind of a pain because all sub-dependencies need to be manually added).
Solution:
top-level build.gradle
...
subprojects {
configurations {
fooRuntime.extendsFrom runtimeOnly
fooClasspath.extendsFrom runtimeClasspath, fooRuntime
}
distributions {
foo {
contents {
from installDist.destinationDir
from(configurations.fooClasspath) {
into 'lib'
}
}
}
}
installFooDist.dependsOn installDist
}
project A build.gradle
dependencies {
fooRuntime project(':projectB')
fooRuntime project(':projectC') // only need this because transitive dependencies won't work
}
task run(type: JavaExec, dependsOn: installFooDist) {
classpath = fileTree("$installFooDist.destinationDir/lib")
}
project B build.gradle
dependencies {
fooRuntime project(':projectC')
}
task run(type: JavaExec, dependsOn: installFooDist) {
classpath = fileTree("$installFooDist.destinationDir/lib")
}