mill.scalalib.dependency.versions.VersionParser.scala Maven / Gradle / Ivy
package mill.scalalib.dependency.versions
import fastparse._
import fastparse.NoWhitespace._
private[dependency] object VersionParser {
private def numberParser[_p: P] =
P(CharIn("0-9").rep(1).!.map(_.toLong))
private def numericPartParser[_p: P] =
P(numberParser ~ &(CharIn(".\\-+") | End)).rep(min = 1, sep = ".")
private def tokenParser[_p: P] =
CharPred(c => c != '.' && c != '-' && c != '+').rep(1).!
private def tokenPartParser[_p: P] =
tokenParser.rep(sep = CharIn(".\\-"))
private def firstPartParser[_p: P] =
P(CharIn(".\\-") ~ tokenPartParser).?
private def secondPartParser[_p: P] =
P("+" ~ tokenPartParser).?
private def versionParser[_p: P] =
P(numericPartParser ~ firstPartParser ~ secondPartParser).map {
case (a, b, c) => (a, b.getOrElse(Seq.empty), c.getOrElse(Seq.empty))
}
def parse(text: String): Parsed[(Seq[Long], Seq[String], Seq[String])] =
fastparse.parse(text, versionParser(_))
}