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.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, List<String> args) throws IOException {
75 for (String arg : args) {
76 if (arg.length() > 1 && arg.charAt(0) == '@') {
77 arg = arg.substring(1);
78 if (arg.charAt(0) == '@') {
79 newArgs.add(arg);
80 } else {
81 loadCmdFile(arg, newArgs);
82 }
83 } else {
84 newArgs.add(arg);
85 }
86 }
87 }
88
89 private static void loadCmdFile(String name, List<String> args) throws IOException {
90 if (!Files.isReadable(Path.of(name))) {
91 throw new FileNotFoundException(name);
92 }
93 try (Reader r = Files.newBufferedReader(Paths.get(name), Charset.defaultCharset())) {
94 Tokenizer t = new Tokenizer(r);
95 String s;
96 while ((s = t.nextToken()) != null) {
97 args.add(s);
98 }
99 }
100 }
101
102 public static class Tokenizer {
103 private final Reader in;
104 private int ch;
105
106 public Tokenizer(Reader in) throws IOException {
107 this.in = in;
108 ch = in.read();
109 }
110
111 public String nextToken() throws IOException {
112 skipWhite();
113 if (ch == -1) {
114 return null;
115 }
116
117 StringBuilder sb = new StringBuilder();
118 char quoteChar = 0;
119
120 while (ch != -1) {
121 switch (ch) {
122 case ' ':
123 case '\t':
124 case '\f':
125 if (quoteChar == 0) {
126 return sb.toString();
127 }
128 sb.append((char) ch);
129 break;
130
131 case '\n':
132 case '\r':
133 return sb.toString();
134
135 case '\'':
136 case '"':
137 if (quoteChar == 0) {
138 quoteChar = (char) ch;
139 } else if (quoteChar == ch) {
140 quoteChar = 0;
141 } else {
142 sb.append((char) ch);
143 }
144 break;
145
146 case '\\':
147 if (quoteChar != 0) {
148 ch = in.read();
149 switch (ch) {
150 case '\n':
151 case '\r':
152 while (ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t' || ch == '\f') {
153 ch = in.read();
154 }
155 continue;
156
157 case 'n':
158 ch = '\n';
159 break;
160 case 'r':
161 ch = '\r';
162 break;
163 case 't':
164 ch = '\t';
165 break;
166 case 'f':
167 ch = '\f';
168 break;
169 }
170 }
171 sb.append((char) ch);
172 break;
173
174 default:
175 sb.append((char) ch);
176 }
177
178 ch = in.read();
179 }
180
181 return sb.toString();
182 }
183
184 void skipWhite() throws IOException {
185 while (ch != -1) {
186 switch (ch) {
187 case ' ':
188 case '\t':
189 case '\n':
190 case '\r':
191 case '\f':
192 break;
193
194 case '#':
195 ch = in.read();
196 while (ch != '\n' && ch != '\r' && ch != -1) {
197 ch = in.read();
198 }
199 break;
200
201 default:
202 return;
203 }
204
205 ch = in.read();
206 }
207 }
208 }
209 }