com.redhat.ceylon.langtools.tools.javac.main.CommandLine Maven / Gradle / Ivy
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
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package com.redhat.ceylon.langtools.tools.javac.main;
import java.io.IOException;
import java.io.Reader;
import java.io.FileReader;
import java.io.BufferedReader;
import java.io.StreamTokenizer;
import com.redhat.ceylon.langtools.tools.javac.util.ListBuffer;
/**
* Various utility methods for processing Java tool command line arguments.
*
* This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own risk.
* This code and its internal interfaces are subject to change or
* deletion without notice.
*/
public class CommandLine {
/**
* Process Win32-style command files for the specified command line
* arguments and return the resulting arguments. A command file argument
* is of the form '@file' where 'file' is the name of the file whose
* contents are to be parsed for additional arguments. The contents of
* the command file are parsed using StreamTokenizer and the original
* '@file' argument replaced with the resulting tokens. Recursive command
* files are not supported. The '@' character itself can be quoted with
* the sequence '@@'.
*/
public static String[] parse(String[] args)
throws IOException
{
ListBuffer newArgs = new ListBuffer();
for (int i = 0; i < args.length; i++) {
String arg = args[i];
if (arg.length() > 1 && arg.charAt(0) == '@') {
arg = arg.substring(1);
if (arg.charAt(0) == '@') {
newArgs.append(arg);
} else {
loadCmdFile(arg, newArgs);
}
} else {
newArgs.append(arg);
}
}
return newArgs.toList().toArray(new String[newArgs.length()]);
}
private static void loadCmdFile(String name, ListBuffer args)
throws IOException
{
Reader r = new BufferedReader(new FileReader(name));
StreamTokenizer st = new StreamTokenizer(r);
st.resetSyntax();
st.wordChars(' ', 255);
st.whitespaceChars(0, ' ');
st.commentChar('#');
st.quoteChar('"');
st.quoteChar('\'');
while (st.nextToken() != StreamTokenizer.TT_EOF) {
args.append(st.sval);
}
r.close();
}
}