discontinued obsolete Cygwin module;

--- a/src/Pure/System/cygwin.scala	Thu May 24 23:28:58 2012 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,40 +0,0 @@
-/*  Title:      Pure/System/cygwin.scala
-    Module:     PIDE
-    Author:     Makarius
-
-Accessing the Cygwin installation.
-*/
-
-package isabelle
-
-import java.lang.System
-import java.io.File
-import java.net.URL
-import java.awt.Component
-
-
-object Cygwin
-{
-  /* Cygwin installation */
-
-  private def sanity_check(root: File)
-  {
-    if (!new File(root, "bin\\bash.exe").isFile ||
-        !new File(root, "bin\\env.exe").isFile ||
-        !new File(root, "bin\\tar.exe").isFile)
-      error("Bad Cygwin installation: " + root.toString)
-  }
-
-  def check_root(): String =
-  {
-    val cygwin_root1 = System.getenv("CYGWIN_ROOT")
-    val cygwin_root2 = System.getProperty("cygwin.root")
-    val root =
-      if (cygwin_root1 != null && cygwin_root1 != "") cygwin_root1
-      else if (cygwin_root2 != null && cygwin_root2 != "") cygwin_root2
-      else error("Bad Cygwin installation: unknown root")
-    sanity_check(new File(root))
-    root
-  }
-}
-

--- a/src/Pure/System/gui_setup.scala	Thu May 24 23:28:58 2012 +0200
+++ b/src/Pure/System/gui_setup.scala	Thu May 24 23:44:16 2012 +0200
@@ -41,7 +41,7 @@
 
     // values
     if (Platform.is_windows)
-      text.append("Cygwin root: " + Cygwin.check_root() + "\n")
+      text.append("Cygwin root: " + Standard_System.cygwin_root() + "\n")
     text.append("JVM name: " + Platform.jvm_name + "\n")
     text.append("JVM platform: " + Platform.jvm_platform + "\n")
     text.append("JVM home: " + java.lang.System.getProperty("java.home") + "\n")

--- a/src/Pure/System/standard_system.scala	Thu May 24 23:28:58 2012 +0200
+++ b/src/Pure/System/standard_system.scala	Thu May 24 23:44:16 2012 +0200
@@ -269,6 +269,27 @@
       proc.destroy
     }
   }
+
+
+  /* cygwin_root */
+
+  def cygwin_root(): String =
+  {
+    val cygwin_root1 = System.getenv("CYGWIN_ROOT")
+    val cygwin_root2 = System.getProperty("cygwin.root")
+    val root =
+      if (cygwin_root1 != null && cygwin_root1 != "") cygwin_root1
+      else if (cygwin_root2 != null && cygwin_root2 != "") cygwin_root2
+      else error("Bad Cygwin installation: unknown root")
+
+    val root_file = new File(root)
+    if (!new File(root_file, "bin\\bash.exe").isFile ||
+        !new File(root_file, "bin\\env.exe").isFile ||
+        !new File(root_file, "bin\\tar.exe").isFile)
+      error("Bad Cygwin installation: " + quote(root))
+
+    root
+  }
 }
 
 
@@ -276,7 +297,7 @@
 {
   /* platform_root */
 
-  val platform_root = if (Platform.is_windows) Cygwin.check_root() else "/"
+  val platform_root = if (Platform.is_windows) Standard_System.cygwin_root() else "/"
 
 
   /* jvm_path */

--- a/src/Pure/build-jars	Thu May 24 23:28:58 2012 +0200
+++ b/src/Pure/build-jars	Thu May 24 23:44:16 2012 +0200
@@ -39,7 +39,6 @@
   PIDE/text.scala
   PIDE/xml.scala
   PIDE/yxml.scala
-  System/cygwin.scala
   System/event_bus.scala
   System/gui_setup.scala
   System/invoke_scala.scala