Refactor network client

Neither The ConsoleAppender class nor the jni based ClientSocket can be
used in a graalvm native image. This commit reworks the NetworkClient so
that we can avoid those limitations. It also adds some additional
command line argument parsing and changes the value of the run method to
return Int rather than Unit for exit code support.

main-command/src/main/scala/sbt/internal/client/NetworkClient.scala

@@ -9,13 +9,13 @@ package sbt
 package internal
 package client
 
-import java.io.{ File, IOException }
+import java.io.{ File, IOException, InputStream, PrintStream }
 import java.util.UUID
 import java.util.concurrent.atomic.{ AtomicBoolean, AtomicReference }
 
 import sbt.internal.langserver.{ LogMessageParams, MessageType, PublishDiagnosticsParams }
 import sbt.internal.protocol._
-import sbt.internal.util.{ ConsoleAppender, LineReader }
+import sbt.internal.util.{ ConsoleAppender, ConsoleOut, LineReader }
 import sbt.io.IO
 import sbt.io.syntax._
 import sbt.protocol._
@@ -23,19 +23,51 @@ import sbt.util.Level
 import sjsonnew.support.scalajson.unsafe.Converter
 
 import scala.collection.mutable.ListBuffer
+import scala.collection.mutable
 import scala.sys.process.{ BasicIO, Process, ProcessLogger }
+import scala.util.Properties
 import scala.util.control.NonFatal
 import scala.util.{ Failure, Success }
+import NetworkClient.Arguments
 
-class NetworkClient(configuration: xsbti.AppConfiguration, arguments: List[String]) { self =>
-  private val channelName = new AtomicReference("_")
+trait ConsoleInterface {
+  def appendLog(level: Level.Value, message: => String): Unit
+  def success(msg: String): Unit
+}
+
+class NetworkClient(
+    console: ConsoleInterface,
+    arguments: Arguments,
+    inputStream: InputStream,
+    errorStream: PrintStream,
+    printStream: PrintStream,
+    useJNI: Boolean,
+) extends AutoCloseable { self =>
+  def this(configuration: xsbti.AppConfiguration, arguments: Arguments) =
+    this(
+      console = NetworkClient.consoleAppenderInterface(System.out),
+      arguments = arguments.withBaseDirectory(configuration.baseDirectory),
+      inputStream = System.in,
+      errorStream = System.err,
+      printStream = System.out,
+      useJNI = false,
+    )
+  def this(configuration: xsbti.AppConfiguration, args: List[String]) =
+    this(
+      console = NetworkClient.consoleAppenderInterface(System.out),
+      arguments =
+        NetworkClient.parseArgs(args.toArray).withBaseDirectory(configuration.baseDirectory),
+      inputStream = System.in,
+      errorStream = System.err,
+      printStream = System.out,
+      useJNI = false,
+    )
   private val status = new AtomicReference("Ready")
   private val lock: AnyRef = new AnyRef {}
   private val running = new AtomicBoolean(true)
   private val pendingExecIds = ListBuffer.empty[String]
 
-  private val console = ConsoleAppender("thin1")
-  private def baseDirectory: File = configuration.baseDirectory
+  private def baseDirectory: File = arguments.baseDirectory
 
   lazy val connection = init()
 
@@ -196,9 +228,7 @@ class NetworkClient(configuration: xsbti.AppConfiguration, arguments: List[Strin
   def start(): Unit = {
     console.appendLog(Level.Info, "entering *experimental* thin client - BEEP WHIRR")
     val _ = connection
-    val userCommands = arguments filterNot { cmd =>
-      cmd.startsWith("-")
-    }
+    val userCommands = arguments.commandArguments.toList
     if (userCommands.isEmpty) shell()
     else batchExecute(userCommands)
   }
@@ -258,14 +288,77 @@ class NetworkClient(configuration: xsbti.AppConfiguration, arguments: List[Strin
       status.set("Processing")
     }
   }
+  override def close(): Unit = {}
 }
-
 object NetworkClient {
-  def run(configuration: xsbti.AppConfiguration, arguments: List[String]): Unit =
+  private def consoleAppenderInterface(printStream: PrintStream): ConsoleInterface = {
+    val appender = ConsoleAppender("thin", ConsoleOut.printStreamOut(printStream))
+    new ConsoleInterface {
+      override def appendLog(level: Level.Value, message: => String): Unit =
+        appender.appendLog(level, message)
+      override def success(msg: String): Unit = appender.success(msg)
+    }
+  }
+  private def simpleConsoleInterface(printStream: PrintStream): ConsoleInterface =
+    new ConsoleInterface {
+      import scala.Console.{ GREEN, RED, RESET, YELLOW }
+      override def appendLog(level: Level.Value, message: => String): Unit = {
+        val prefix = level match {
+          case Level.Error => s"[$RED$level$RESET]"
+          case Level.Warn  => s"[$YELLOW$level$RESET]"
+          case _           => s"[$RESET$level$RESET]"
+        }
+        message.split("\n").foreach { line =>
+          if (!line.trim.isEmpty) printStream.println(s"$prefix $line")
+        }
+      }
+      override def success(msg: String): Unit = printStream.println(s"[${GREEN}success$RESET] $msg")
+    }
+  private[client] class Arguments(
+      val baseDirectory: File,
+      val sbtArguments: Seq[String],
+      val commandArguments: Seq[String],
+      val sbtScript: String,
+  ) {
+    def withBaseDirectory(file: File): Arguments =
+      new Arguments(file, sbtArguments, commandArguments, sbtScript)
+  }
+  private[client] def parseArgs(args: Array[String]): Arguments = {
+    var i = 0
+    var sbtScript = if (Properties.isWin) "sbt.cmd" else "sbt"
+    val commandArgs = new mutable.ArrayBuffer[String]
+    val sbtArguments = new mutable.ArrayBuffer[String]
+    val SysProp = "-D([^=]+)=(.*)".r
+    val sanitized = args.flatMap {
+      case a if a.startsWith("\"") => Array(a)
+      case a                       => a.split(" ")
+    }
+    while (i < sanitized.length) {
+      sanitized(i) match {
+        case a if a.startsWith("--sbt-script=") =>
+          sbtScript = a.split("--sbt-script=").lastOption.getOrElse(sbtScript)
+        case a if !a.startsWith("-") => commandArgs += a
+        case a @ SysProp(key, value) =>
+          System.setProperty(key, value)
+          sbtArguments += a
+        case a =>
+          sbtArguments += a
+      }
+      i += 1
+    }
+    new Arguments(new File("").getCanonicalFile, sbtArguments, commandArgs, sbtScript)
+  }
+
+  def run(configuration: xsbti.AppConfiguration, arguments: List[String]): Int =
     try {
-      new NetworkClient(configuration, arguments)
-      ()
+      val client = new NetworkClient(configuration, parseArgs(arguments.toArray))
+      try {
+        client.start()
+        0
+      } catch { case _: Throwable => 1 } finally client.close()
     } catch {
-      case NonFatal(e) => println(e.getMessage)
+      case NonFatal(e) =>
+        e.printStackTrace()
+        1
     }
 }