updated file scala/tools/nsc/MainScript.scala to run it in the DOS console

added executables bin/scalascript* to the Scala distribution



git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@7449 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

build.xml

@@ -57,6 +57,7 @@ PROPERTIES
   <property name="scalac.exec.name" value="scalac"/>
   <property name="scaladoc.exec.name" value="scaladoc"/>
   <property name="scalaint.exec.name" value="scalaint"/>
+  <property name="scalascript.exec.name" value="scalascript"/>
 
 <!-- ===========================================================================
 INITIALISATION
@@ -338,6 +339,12 @@ BUILD LOCAL REFERENCE (LOCKER) LAYER
       class="scala.tools.nsc.MainInterpreter"
       version="${version.number}"
       copyright="${copyright.string}"/>
+    <lockertool
+      file="${locker.dir}/bin/${scalascript.exec.name}"
+      name="Scala scripting tool"
+      class="scala.tools.nsc.MainScript"
+      version="${version.number}"
+      copyright="${copyright.string}"/>
     <chmod perm="ugo+rx"
       file="${locker.dir}/bin/${scalac.exec.name}"/>
     <chmod perm="ugo+rx"
@@ -346,6 +353,8 @@ BUILD LOCAL REFERENCE (LOCKER) LAYER
       file="${locker.dir}/bin/${scaladoc.exec.name}"/>
     <chmod perm="ugo+rx"
       file="${locker.dir}/bin/${scalaint.exec.name}"/>
+    <chmod perm="ugo+rx"
+      file="${locker.dir}/bin/${scalascript.exec.name}"/>
     <!-- Mark LOCKER as being completely built -->
     <touch file="${locker.dir}/complete" verbose="no"/>
   </target>
@@ -450,6 +459,12 @@ BUILD QUICK-TEST LAYER
       class="scala.tools.nsc.MainInterpreter"
       version="${version.number}"
       copyright="${copyright.string}"/>
+    <quicktool
+      file="${quick.dir}/bin/${scalascript.exec.name}"
+      name="Scala scripting tool"
+      class="scala.tools.nsc.MainScript"
+      version="${version.number}"
+      copyright="${copyright.string}"/>
     <chmod perm="ugo+rx"
       file="${quick.dir}/bin/${scalac.exec.name}"/>
     <chmod perm="ugo+rx"
@@ -458,6 +473,8 @@ BUILD QUICK-TEST LAYER
       file="${quick.dir}/bin/${scaladoc.exec.name}"/>
     <chmod perm="ugo+rx"
       file="${quick.dir}/bin/${scalaint.exec.name}"/>
+    <chmod perm="ugo+rx"
+      file="${quick.dir}/bin/${scalascript.exec.name}"/>
   </target>
 
   <target name="test.quick" depends="build">
@@ -564,6 +581,12 @@ TEST
       class="scala.tools.nsc.MainInterpreter"
       version="${version.number}"
       copyright="${copyright.string}"/>
+    <straptool
+      file="${strap.dir}/bin/${scalascript.exec.name}"
+      name="Scala scripting tool"
+      class="scala.tools.nsc.MainScript"
+      version="${version.number}"
+      copyright="${copyright.string}"/>
     <chmod perm="ugo+rx"
       file="${strap.dir}/bin/${scalac.exec.name}"/>
     <chmod perm="ugo+rx"
@@ -572,6 +595,8 @@ TEST
       file="${strap.dir}/bin/${scaladoc.exec.name}"/>
     <chmod perm="ugo+rx"
       file="${strap.dir}/bin/${scalaint.exec.name}"/>
+    <chmod perm="ugo+rx"
+      file="${strap.dir}/bin/${scalascript.exec.name}"/>
   </target>
 
   <!-- Compares quick and test level -->
@@ -722,6 +747,7 @@ GENERATES A DISTRIBUTION
     <chmod perm="ugo+rx" file="${dist.current.dir}/bin/${scala.exec.name}"/>
     <chmod perm="ugo+rx" file="${dist.current.dir}/bin/${scaladoc.exec.name}"/>
     <chmod perm="ugo+rx" file="${dist.current.dir}/bin/${scalaint.exec.name}"/>
+    <chmod perm="ugo+rx" file="${dist.current.dir}/bin/${scalascript.exec.name}"/>
   <!-- Copy the API, examples and man -->
     <copy todir="${dist.current.dir}/doc/scala">
       <fileset dir="${docs.dir}" includes="README,LICENSE"/>

src/compiler/scala/tools/nsc/MainScript.scala

@@ -1,14 +1,32 @@
+/* NSC -- new Scala compiler
+ * Copyright 2005-2006 LAMP/EPFL
+ * @author  Martin Odersky
+ */
+// $Id: $
+
 package scala.tools.nsc
+
 import java.io.{BufferedReader,FileReader}
 
-/** A main routine to support putting Scala code into scripts.  An example
+/** A main routine to support putting Scala code into scripts.
- *  script would look like this:
+ *
+ *  An shell script example on Unix would look like this:
  *  
  *    #!/bin/sh
- *    scalascript $0 "$@"
+ *    exec scalascript "$0" "$@"
  *    !#
  *    Console.println("Hello, world!")
+ *    argv.toList foreach Console.println
  *
+ * A batch file example on Windows XP would look like this:
+ *
+ *    ::#!
+ *    @echo off
+ *    call scalascript %0 %*
+ *    goto :eof
+ *    ::!#
+ *    Console.println("Hello, world!")
+ *    argv.toList foreach Console.println
  *
  * TODO: It would be better if error output went to stderr instead
  * of stdout....
@@ -18,6 +36,9 @@ object MainScript {
     * part if there is one.  The header part starts with "#!"
     * and ends with a line that begins with "!#".
     */
+  val startRegexp = "^(::)?#!.*"
+  val endRegexp = "^(::)?!#.*"
+
   def readFileSkippingHeader(filename: String): String = {
     val file =
       new BufferedReader(
@@ -26,15 +47,15 @@ object MainScript {
 
     // skip the header, if there is one
     val firstLine = file.readLine
-    if(firstLine == null)
+    if (firstLine == null)
       return ""
-    else if(firstLine.startsWith("#!")) {
+    else if (firstLine.matches(startRegexp)) {
       // skip until !# is seen
-      def lp:Unit = {
+      def lp: Unit = {
         val line = file.readLine
-        if(line == null)
+        if (line == null)
           ()
-        else if(!line.startsWith("!#"))
+        else if (!line.matches(endRegexp))
           lp
       }
       lp
@@ -45,7 +66,7 @@ object MainScript {
     // now read the rest of the file
     def lp: Unit = {
       val line = file.readLine
-      if(line == null)
+      if (line == null)
         return ()
       contents.append(line)
       contents.append("\n")
@@ -77,21 +98,21 @@ object MainScript {
   def parseArgs(args: List[String])
       :Tuple3[List[String], String, List[String]] =
   {
-    if(args.length == 0)
+    if (args.length == 0)
       usageExit
 
-    if(args(0).startsWith("-")) {
+    if (args(0).startsWith("-")) {
       // the line includes compiler arguments
       val hyphenIndex = args.indexOf("-")
-      if(hyphenIndex < 0)
+      if (hyphenIndex < 0)
         usageExit
-      if(hyphenIndex == (args.length - 1))
+      if (hyphenIndex == (args.length - 1))
         usageExit
 
       Tuple3(
         args.subseq(0, hyphenIndex).toList,
-        args(hyphenIndex+1),
+        args(hyphenIndex + 1),
-        args.subseq(hyphenIndex+2, args.length - hyphenIndex - 2).toList)
+        args.subseq(hyphenIndex + 2, args.length - hyphenIndex - 2).toList)
     } else {
       Tuple3(
         Nil,
@@ -115,7 +136,7 @@ object MainScript {
     if (!command.ok || command.settings.help.value) {
       // either the command line is wrong, or the user
       // explicitly requested a help listing
-      if(!command.ok)
+      if (!command.ok)
         Console.println
       usageExit
     }
@@ -130,9 +151,10 @@ object MainScript {
 
     val interpreter = new Interpreter(command.settings)
     interpreter.beQuiet
-    if(!interpreter.compileString(toRun))
+    if (!interpreter.compileString(toRun))
       return () // compilation error
     interpreter.bind("argv", "Array[String]", scriptArgs)
     interpreter.interpret("scala.scripting.Main.main(argv)")
   }
+
 }