replpp.shaded.scopt.PlatformReadInstances.scala Maven / Gradle / Ivy
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package replpp.shaded.scopt
import java.net.{ URL, UnknownHostException }
import collection.{ Seq => CSeq }
import scala.io.Source
private[scopt] object platform {
val _NL = System.getProperty("line.separator")
import java.util.{ Locale, Calendar, GregorianCalendar }
import java.text.SimpleDateFormat
import java.io.File
import java.nio.file.{ Path, Paths }
import java.net.{ InetAddress, URI }
type ParseException = java.text.ParseException
def mkParseEx(s: String, p: Int) = new java.text.ParseException(s, p)
trait PlatformReadInstances {
def calendarRead(pattern: String): Read[Calendar] = calendarRead(pattern, Locale.getDefault)
def calendarRead(pattern: String, locale: Locale): Read[Calendar] =
Read.reads { s =>
val fmt = new SimpleDateFormat(pattern, locale)
val c = new GregorianCalendar(locale)
c.setTime(fmt.parse(s))
c
}
implicit val yyyymmdddRead: Read[Calendar] = calendarRead("yyyy-MM-dd")
implicit val fileRead: Read[File] = Read.reads { new File(_) }
implicit val pathRead: Read[Path] = Read.reads { Paths.get(_) }
implicit val sourceRead: Read[Source] = Read.reads { Source.fromFile(_) }
implicit val inetAddress: Read[InetAddress] = Read.reads { InetAddress.getByName(_) }
implicit val urlRead: Read[URL] = Read.reads { new URL(_) }
}
def applyArgumentExHandler[C](
desc: String,
arg: String
): PartialFunction[Throwable, Either[CSeq[String], C]] = {
case e: NumberFormatException =>
Left(List(desc + " expects a number but was given '" + arg + "'"))
case e: UnknownHostException =>
Left(
List(
desc + " expects a host name or an IP address but was given '" + arg + "' which is invalid"
)
)
case e: ParseException if e.getMessage.contains("Unparseable date") =>
Left(
List(
s"$desc date format ('$arg') couldn't be parsed using implicit instance of `Read[Date]`."
)
)
case _: ParseException =>
Left(List(s"$desc expects a Scala duration but was given '$arg'"))
case e: Throwable => Left(List(desc + " failed when given '" + arg + "'. " + e.getMessage))
}
def exit(status: Int): Nothing = sys.exit(status)
}