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/* NSC -- new scala compiler
* Copyright 2005 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc;
import java.io._;
import scala.tools.nsc.util.{Position};
import scala.tools.nsc.reporters.{Reporter, ConsoleReporter};
/** The main class for NSC, a compiler for the programming
* language Scala.
*/
object Main {
val PRODUCT: String =
System.getProperty("scala.product", "scalac");
val VERSION: String =
System.getProperty("scala.version", "unknown version");
val versionMsg = PRODUCT + " " + VERSION + " -- (c) 2002-05 LAMP/EPFL";
val prompt = "\nnsc> ";
private var reporter: ConsoleReporter = _;
def error(msg: String): unit =
reporter.error(new Position(PRODUCT),
msg + "\n " + PRODUCT + " -help gives more information");
def errors() = reporter.errors();
private def loop(action: (String) => Unit): unit = {
val in = new BufferedReader(new InputStreamReader(System.in));
System.out.print(prompt);
var line = in.readLine();
while (line != null && line.length() > 0) {
action(line);
System.out.print(prompt);
line = in.readLine();
}
}
def resident(compiler: Global): unit = {
/*
val in = new BufferedReader(new InputStreamReader(System.in));
System.out.print(prompt);
var line = in.readLine();
while (line != null && line.length() > 0) {
val args = List.fromString(line, ' ');
val command = new CompilerCommand(args, error, true);
(new compiler.Run) compile command.files;
System.out.print(prompt);
line = in.readLine();
}
*/
loop(line => {
val args = List.fromString(line, ' ');
val command = new CompilerCommand(args, error, true);
(new compiler.Run) compile command.files
})
}
def interpret(gCompiler: Global): unit = {
val interpreter = new Interpreter {
val compiler: gCompiler.type = gCompiler
};
loop(line => try {
interpreter.interpret(line.trim(), reporter)
} catch {
case e: Exception => {
reporter.info(null,e.getMessage(),true);
//e.printStackTrace();
}
}
)
}
def process(args: Array[String]): unit = {
reporter = new ConsoleReporter();
val command = new CompilerCommand(List.fromArray(args), error, false);
reporter.prompt(command.settings.prompt.value);
if (command.settings.version.value)
reporter.info(null, versionMsg, true)
else if (command.settings.help.value)
reporter.info(null, command.usageMsg, true)
else {
try {
val compiler = new Global(command.settings, reporter);
if (command.settings.resident.value)
resident(compiler);
else if (command.settings.interpret.value)
interpret(compiler);
else if (command.files.isEmpty)
reporter.info(null, command.usageMsg, true)
else
(new compiler.Run) compile command.files;
} catch {
case ex @ FatalError(msg) =>
if (command.settings.debug.value)
ex.printStackTrace();
reporter.error(null, "fatal error: " + msg);
}
reporter.printSummary()
}
}
def main(args: Array[String]): unit = {
process(args);
System.exit(if (reporter.errors() > 0) 1 else 0);
}
}
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