/*
* Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package jdk.incubator.jpackage.main;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.File;
import java.io.Reader;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* This file was originally a copy of CommandLine.java in
* com.sun.tools.javac.main.
* It should track changes made to that file.
*/
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.
/**
* Various utility methods for processing Java tool command line arguments.
*
* <p><b>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.</b>
*/
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 '@@'.
Params: - args – the arguments that may contain @files
Throws: - IOException – if there is a problem reading any of the @files
Returns: the arguments, with @files expanded
/**
* 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 '@@'.
* @param args the arguments that may contain @files
* @return the arguments, with @files expanded
* @throws IOException if there is a problem reading any of the @files
*/
public static String[] parse(String[] args) throws IOException {
List<String> newArgs = new ArrayList<>();
appendParsedCommandArgs(newArgs, Arrays.asList(args));
return newArgs.toArray(new String[newArgs.size()]);
}
private static void appendParsedCommandArgs(List<String> newArgs,
List<String> args) throws IOException {
for (String arg : args) {
if (arg.length() > 1 && arg.charAt(0) == '@') {
arg = arg.substring(1);
if (arg.charAt(0) == '@') {
newArgs.add(arg);
} else {
loadCmdFile(arg, newArgs);
}
} else {
newArgs.add(arg);
}
}
}
private static void loadCmdFile(String name, List<String> args)
throws IOException {
if (!Files.isReadable(Path.of(name))) {
throw new FileNotFoundException(name);
}
try (Reader r = Files.newBufferedReader(Paths.get(name),
Charset.defaultCharset())) {
Tokenizer t = new Tokenizer(r);
String s;
while ((s = t.nextToken()) != null) {
args.add(s);
}
}
}
public static class Tokenizer {
private final Reader in;
private int ch;
public Tokenizer(Reader in) throws IOException {
this.in = in;
ch = in.read();
}
public String nextToken() throws IOException {
skipWhite();
if (ch == -1) {
return null;
}
StringBuilder sb = new StringBuilder();
char quoteChar = 0;
while (ch != -1) {
switch (ch) {
case ' ':
case '\t':
case '\f':
if (quoteChar == 0) {
return sb.toString();
}
sb.append((char) ch);
break;
case '\n':
case '\r':
return sb.toString();
case '\'':
case '"':
if (quoteChar == 0) {
quoteChar = (char) ch;
} else if (quoteChar == ch) {
quoteChar = 0;
} else {
sb.append((char) ch);
}
break;
case '\\':
if (quoteChar != 0) {
ch = in.read();
switch (ch) {
case '\n':
case '\r':
while (ch == ' ' || ch == '\n'
|| ch == '\r' || ch == '\t'
|| ch == '\f') {
ch = in.read();
}
continue;
case 'n':
ch = '\n';
break;
case 'r':
ch = '\r';
break;
case 't':
ch = '\t';
break;
case 'f':
ch = '\f';
break;
}
}
sb.append((char) ch);
break;
default:
sb.append((char) ch);
}
ch = in.read();
}
return sb.toString();
}
void skipWhite() throws IOException {
while (ch != -1) {
switch (ch) {
case ' ':
case '\t':
case '\n':
case '\r':
case '\f':
break;
case '#':
ch = in.read();
while (ch != '\n' && ch != '\r' && ch != -1) {
ch = in.read();
}
break;
default:
return;
}
ch = in.read();
}
}
}
}