How to create custom build step based on existing one in TeamCity Kotlin DSL? - kotlin

Question

I use TeamCity Kotlin DSL 2018.1 to set up build configuration. My settings.kts file looks like this:
version = "2018.1"
project {
buildType {
id("some-id")
name = "name"
steps {
ant {
name = "Step1"
targets = "target1"
mode = antFile { path = "/some/path" }
workingDir = "/some/dir"
jdkHome = "some_jdk"
}
ant {
name = "Step2"
targets = "target2"
mode = antFile { path = "/some/path" }
workingDir = "/some/dir"
jdkHome = "some_jdk"
}
...
}
}
}
It works as expected, but I want to avoid writing the same repeating parameters for every step over and over again.
I tried to write function, which would construct build step pre-filled with default values:
fun customAnt(init: AntBuildStep.() -> kotlin.Unit): AntBuildStep {
val ant_file = AntBuildStep.Mode.AntFile()
ant_file.path = "/some/path"
val ant = AntBuildStep()
ant.mode = ant_file
ant.workingDir = "/some/dir"
ant.jdkHome = "some_jdk"
return ant
}
project {
buildType {
id("some-id")
name = "name"
steps {
customAnt {
name = "Step1"
targets = "target1"
}
customAnt {
name = "Step2"
targets = "target2"
}
...
}
}
}
It compiles but doesn't work: TeamCity just ignores build steps, defined in this way.
Unfortunately, official documentation doesn't contain any information about customizing and extending DSL. Probably, I'm doing something wrong with Kotlin's () -> Unit construction, but can't find out what exactly is wrong.

Answer 1

I got it.
Actually, I was close. The following code works just as I wanted:
version = "2018.1"
fun BuildSteps.customAnt(init: AntBuildStep.() -> Unit): AntBuildStep {
val ant_file = AntBuildStep.Mode.AntFile()
ant_file.path = "/some/path"
val result = AntBuildStep(init)
result.mode = ant_file
result.workingDir = "/some/dir"
result.jdkHome = "some_jdk"
step(result)
return result
}
project {
buildType {
steps {
customAnt {
name = "step1"
targets = "target1"
}
customAnt {
name = "step2"
targets = "target2"
}
...
}
}
}