Scala cli-style inline deps declarations for mill

build.sc

import mill._, scalalib._


object MyModule extends ScalaModule {
  def inlineIvyDeps = T {
    def parseDep(usingDepClause: String): Dep = {
      val part = usingDepClause.drop("//> using dep ".size)
      if (part.startsWith("\"")) Dep.parse(part.tail.init.trim)
      else Dep.parse(part.trim)
    }

    val deps = for {
      sourceRoot <- geny.Generator(sources()).flatten
      scalaFile <- os.walk.stream(sourceRoot.path).filter(path => os.isFile(path) && path.ext == "scala")
      usingDep <- os.read.lines.stream(scalaFile).filter(line => line.startsWith("//> using dep"))
    } yield parseDep(usingDep)

    Agg.from(deps.toList)
  }
  
  def ivyDeps = inlineIvyDeps()
}