Question: Suppose I have this:

buildscript {
  dependencies {
    classpath(platform(libs.my.platform))
  }
}

plugins {
  alias(libs.plugins.my.plugin)
}

and this version catalog:

[libraries]
my-platform = "foo:bar:1.0"

[plugins]
my-plugin = { id = "my-plugin" } # version from my-platform

I'm getting a

plugin dependency must include a version number for this source

error; does this mean that the plugin marker artifact needs to also be part of the platform?

Probably, yes. The maker artifact is the way to translate the plugin I'd from the plugins block to an actual code artifact. So you have to provide a version for the marker artifact somehow

Now if only I can convert a

plugins

version catalog entry (ie.

PluginDependency

) to a

MinimalExternalModuleDependency

for its marker artifact.

That's https://github.com/gradle/gradle/issues/17963 which includes work arounds