src/Pure/System/platform.scala
author wenzelm
Thu, 22 Apr 2021 23:40:22 +0200
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/*  Title:      Pure/System/platform.scala
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    Author:     Makarius
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System platform identification.
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*/
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package isabelle
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object Platform
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{
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  /* platform family */
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  val is_linux: Boolean = System.getProperty("os.name", "") == "Linux"
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  val is_macos: Boolean = System.getProperty("os.name", "") == "Mac OS X"
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  val is_windows: Boolean = System.getProperty("os.name", "").startsWith("Windows")
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  val is_unix: Boolean = is_linux || is_macos
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  def family: Family.Value =
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    if (is_linux) Family.linux
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    else if (is_macos) Family.macos
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    else if (is_windows) Family.windows
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    else error("Failed to determine current platform family")
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  object Family extends Enumeration
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  {
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    val linux, macos, windows = Value
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    def unapply(name: String): Option[Value] =
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      try { Some(withName(name)) }
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      catch { case _: NoSuchElementException => None }
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    def parse(name: String): Value =
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      unapply(name) getOrElse error("Bad platform family: " + quote(name))
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  }
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  def standard_platform(platform: Family.Value): String =
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    platform match {
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      case Platform.Family.linux => "x86_64-linux"
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      case Platform.Family.macos => "x86_64-darwin"
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      case Platform.Family.windows => "x86_64-cygwin"
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    }
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  /* platform identifiers */
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  private val X86 = """i.86|x86""".r
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  private val X86_64 = """amd64|x86_64""".r
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  private val Arm64 = """arm64|aarch64""".r
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  private val Arm32 = """arm""".r
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  def cpu_arch: String =
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    System.getProperty("os.arch", "") match {
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      case X86() => "x86"
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      case X86_64() => "x86_64"
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      case Arm64() => "arm64"
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      case Arm32() => "arm32"
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      case _ => error("Failed to determine CPU architecture")
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    }
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  def os_name: String =
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    family match {
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      case Family.macos => "darwin"
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      case _ => family.toString
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    }
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  lazy val jvm_platform: String = cpu_arch + "-" + os_name
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  /* JVM version */
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  private val Version = """1\.(\d+)\.0_(\d+)""".r
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  lazy val jvm_version: String =
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    System.getProperty("java.version") match {
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      case Version(a, b) => a + "u" + b
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      case a => a
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    }
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  /* JVM name */
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  val jvm_name: String = System.getProperty("java.vm.name", "")
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}