1 /* 2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.incubator.jpackage.main; 27 28 import java.io.FileNotFoundException; 29 import java.io.IOException; 30 import java.io.File; 31 import java.io.Reader; 32 import java.nio.charset.Charset; 33 import java.nio.file.Files; 34 import java.nio.file.Path; 35 import java.nio.file.Paths; 36 import java.util.ArrayList; 37 import java.util.Arrays; 38 import java.util.List; 39 40 /** 41 * This file was originally a copy of CommandLine.java in 42 * com.sun.tools.javac.main. 43 * It should track changes made to that file. 44 */ 45 46 /** 47 * Various utility methods for processing Java tool command line arguments. 48 * 49 * <p><b>This is NOT part of any supported API. 50 * If you write code that depends on this, you do so at your own risk. 51 * This code and its internal interfaces are subject to change or 52 * deletion without notice.</b> 53 */ 54 class CommandLine { 55 /** 56 * Process Win32-style command files for the specified command line 57 * arguments and return the resulting arguments. A command file argument 58 * is of the form '@file' where 'file' is the name of the file whose 59 * contents are to be parsed for additional arguments. The contents of 60 * the command file are parsed using StreamTokenizer and the original 61 * '@file' argument replaced with the resulting tokens. Recursive command 62 * files are not supported. The '@' character itself can be quoted with 63 * the sequence '@@'. 64 * @param args the arguments that may contain @files 65 * @return the arguments, with @files expanded 66 * @throws IOException if there is a problem reading any of the @files 67 */ 68 public static String[] parse(String[] args) throws IOException { 69 List<String> newArgs = new ArrayList<>(); 70 appendParsedCommandArgs(newArgs, Arrays.asList(args)); 71 return newArgs.toArray(new String[newArgs.size()]); 72 } 73 74 private static void appendParsedCommandArgs(List<String> newArgs, 75 List<String> args) throws IOException { 76 for (String arg : args) { 77 if (arg.length() > 1 && arg.charAt(0) == '@') { 78 arg = arg.substring(1); 79 if (arg.charAt(0) == '@') { 80 newArgs.add(arg); 81 } else { 82 loadCmdFile(arg, newArgs); 83 } 84 } else { 85 newArgs.add(arg); 86 } 87 } 88 } 89 90 private static void loadCmdFile(String name, List<String> args) 91 throws IOException { 92 if (!Files.isReadable(Path.of(name))) { 93 throw new FileNotFoundException(name); 94 } 95 try (Reader r = Files.newBufferedReader(Paths.get(name), 96 Charset.defaultCharset())) { 97 Tokenizer t = new Tokenizer(r); 98 String s; 99 while ((s = t.nextToken()) != null) { 100 args.add(s); 101 } 102 } 103 } 104 105 public static class Tokenizer { 106 private final Reader in; 107 private int ch; 108 109 public Tokenizer(Reader in) throws IOException { 110 this.in = in; 111 ch = in.read(); 112 } 113 114 public String nextToken() throws IOException { 115 skipWhite(); 116 if (ch == -1) { 117 return null; 118 } 119 120 StringBuilder sb = new StringBuilder(); 121 char quoteChar = 0; 122 123 while (ch != -1) { 124 switch (ch) { 125 case ' ': 126 case '\t': 127 case '\f': 128 if (quoteChar == 0) { 129 return sb.toString(); 130 } 131 sb.append((char) ch); 132 break; 133 134 case '\n': 135 case '\r': 136 return sb.toString(); 137 138 case '\'': 139 case '"': 140 if (quoteChar == 0) { 141 quoteChar = (char) ch; 142 } else if (quoteChar == ch) { 143 quoteChar = 0; 144 } else { 145 sb.append((char) ch); 146 } 147 break; 148 149 case '\\': 150 if (quoteChar != 0) { 151 ch = in.read(); 152 switch (ch) { 153 case '\n': 154 case '\r': 155 while (ch == ' ' || ch == '\n' 156 || ch == '\r' || ch == '\t' 157 || ch == '\f') { 158 ch = in.read(); 159 } 160 continue; 161 162 case 'n': 163 ch = '\n'; 164 break; 165 case 'r': 166 ch = '\r'; 167 break; 168 case 't': 169 ch = '\t'; 170 break; 171 case 'f': 172 ch = '\f'; 173 break; 174 } 175 } 176 sb.append((char) ch); 177 break; 178 179 default: 180 sb.append((char) ch); 181 } 182 183 ch = in.read(); 184 } 185 186 return sb.toString(); 187 } 188 189 void skipWhite() throws IOException { 190 while (ch != -1) { 191 switch (ch) { 192 case ' ': 193 case '\t': 194 case '\n': 195 case '\r': 196 case '\f': 197 break; 198 199 case '#': 200 ch = in.read(); 201 while (ch != '\n' && ch != '\r' && ch != -1) { 202 ch = in.read(); 203 } 204 break; 205 206 default: 207 return; 208 } 209 210 ch = in.read(); 211 } 212 } 213 } 214 }