1 /*
2 * Copyright (c) 2014, 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 build.tools.module;
27
28 import jdk.internal.jimage.Archive;
29 import jdk.internal.jimage.ImageFile;
30 import jdk.internal.jimage.ImageModules;
31
32 import java.io.BufferedReader;
33 import java.io.File;
34 import java.io.IOException;
35 import java.io.InputStream;
36 import java.io.InputStreamReader;
37 import java.io.PrintWriter;
38 import java.io.UncheckedIOException;
39 import java.nio.ByteOrder;
40 import java.nio.file.Files;
41 import java.nio.file.InvalidPathException;
42 import java.nio.file.Path;
43 import java.nio.file.Paths;
44 import java.nio.file.attribute.PosixFilePermission;
45 import java.util.ArrayList;
46 import java.util.Collection;
47 import java.util.HashMap;
48 import java.util.HashSet;
49 import java.util.LinkedList;
50 import java.util.List;
51 import java.util.Map;
52 import java.util.Optional;
53 import java.util.Set;
54 import java.util.stream.Collectors;
55
56 /**
57 * A tool for building a runtime image.
58 *
59 * java build.tools.module.ImageBuilder <options> --output <path> top/modules.xml,...
60 * Possible options are:
61 * --cmds Location of native commands
62 * --configs Location of config files
63 * --help Print this usage message
64 * --classes Location of module classes files
65 * --libs Location of native libraries
66 * --mods Comma separated list of module names
67 * --output Location of the output path
68 * --endian Byte order of the target runtime; {little,big}
69 */
70 class ImageBuilder {
71 static class BadArgs extends Exception {
72 private static final long serialVersionUID = 0L;
73 BadArgs(String format, Object... args) {
74 super(String.format(format, args));
75 this.format = format;
76 this.args = args;
77 }
78 BadArgs showUsage(boolean b) {
79 showUsage = b;
80 return this;
81 }
82 final String format;
83 final Object[] args;
84 boolean showUsage;
85 }
86
87 static abstract class Option {
88 final boolean hasArg;
89 final String[] aliases;
90 Option(boolean hasArg, String... aliases) {
91 this.hasArg = hasArg;
92 this.aliases = aliases;
93 }
94 boolean isHidden() {
95 return false;
96 }
97 boolean matches(String opt) {
98 for (String a : aliases) {
99 if (a.equals(opt)) {
100 return true;
101 } else if (opt.startsWith("--") && hasArg && opt.startsWith(a + "=")) {
102 return true;
103 }
104 }
105 return false;
106 }
107 boolean ignoreRest() {
108 return false;
109 }
110 abstract void process(ImageBuilder task, String opt, String arg) throws BadArgs;
111 abstract String description();
112 }
113
114 private static Path CWD = Paths.get("");
115
116 private static List<Path> splitPath(String arg, String separator)
117 throws BadArgs
118 {
119 List<Path> paths = new ArrayList<>();
120 for (String p: arg.split(separator)) {
121 if (p.length() > 0) {
122 try {
123 Path path = CWD.resolve(p);
124 if (Files.notExists(path))
125 throw new BadArgs("path not found: %s", path);
126 paths.add(path);
127 } catch (InvalidPathException x) {
128 throw new BadArgs("path not valid: %s", p);
129 }
130 }
131 }
132 return paths;
133 }
134
135 static Option[] recognizedOptions = {
136 new Option(true, "--cmds") {
137 void process(ImageBuilder task, String opt, String arg) throws BadArgs {
138 task.options.cmds = splitPath(arg, File.pathSeparator);
139 }
140 String description() { return "Location of native commands"; }
141 },
142 new Option(true, "--configs") {
143 void process(ImageBuilder task, String opt, String arg) throws BadArgs {
144 task.options.configs = splitPath(arg, File.pathSeparator);
145 }
146 String description() { return "Location of config files"; }
147 },
148 new Option(false, "--help") {
149 void process(ImageBuilder task, String opt, String arg) {
150 task.options.help = true;
151 }
152 String description() { return "Print this usage message"; }
153 },
154 new Option(true, "--classes") {
155 void process(ImageBuilder task, String opt, String arg) throws BadArgs {
156 task.options.classes = splitPath(arg, File.pathSeparator);
157 }
158 String description() { return "Location of module classes files"; }
159 },
160 new Option(true, "--libs") {
161 void process(ImageBuilder task, String opt, String arg) throws BadArgs {
162 task.options.libs = splitPath(arg, File.pathSeparator);
163 }
164 String description() { return "Location of native libraries"; }
165 },
166 new Option(true, "--mods") {
167 void process(ImageBuilder task, String opt, String arg) throws BadArgs {
168 for (String mn : arg.split(",")) {
169 if (mn.isEmpty())
170 throw new BadArgs("Module not found", mn);
171 task.options.mods.add(mn);
172 }
173 }
174 String description() { return "Comma separated list of module names"; }
175 },
176 new Option(true, "--output") {
177 void process(ImageBuilder task, String opt, String arg) throws BadArgs {
178 Path path = Paths.get(arg);
179 task.options.output = path;
180 }
181 String description() { return "Location of the output path"; }
182 },
183 new Option(true, "--endian") {
184 void process(ImageBuilder task, String opt, String arg) throws BadArgs {
185 if (arg.equals("little"))
186 task.options.endian = ByteOrder.LITTLE_ENDIAN;
187 else if (arg.equals("big"))
188 task.options.endian = ByteOrder.BIG_ENDIAN;
189 else
190 throw new BadArgs("Unknown byte order " + arg);
191 }
192 String description() { return "Byte order of the target runtime; {little,big}"; }
193 }
194 };
195
196 private final Options options = new Options();
197
198 private PrintWriter log;
199 void setLog(PrintWriter out) {
200 log = out;
201 }
202
203 Set<Module> moduleGraph = new java.util.HashSet<>();
204
205 /** Module list files */
206 private static final String BOOT_MODULES = "boot.modules";
207 private static final String EXT_MODULES = "ext.modules";
208
209 /**
210 * Result codes.
211 */
212 static final int EXIT_OK = 0, // Completed with no errors.
213 EXIT_ERROR = 1, // Completed but reported errors.
214 EXIT_CMDERR = 2, // Bad command-line arguments
215 EXIT_SYSERR = 3, // System error or resource exhaustion.
216 EXIT_ABNORMAL = 4; // terminated abnormally
217
218
219 static class Options {
220 boolean help;
221 List<Path> classes;
222 List<Path> cmds;
223 List<Path> configs;
224 List<Path> libs;
225 Set<String> mods = new HashSet<>();
226 Path output;
227 ByteOrder endian = ByteOrder.nativeOrder(); // default, if not specified
228 }
229
230 public static void main(String[] args) throws Exception {
231 ImageBuilder builder = new ImageBuilder();
232 int rc = builder.run(args);
233 System.exit(rc);
234 }
235
236 int run(String[] args) {
237 if (log == null)
238 log = new PrintWriter(System.out);
239
240 try {
241 handleOptions(args);
242 if (options.help) {
243 showHelp();
244 return EXIT_OK;
245 }
246
247 if (options.classes == null)
248 throw new BadArgs("--classes must be specified").showUsage(true);
249
250 Path output = options.output;
251 if (output == null)
252 throw new BadArgs("--output must be specified").showUsage(true);
253 Files.createDirectories(output);
254 if (Files.list(output).findFirst().isPresent())
255 throw new BadArgs("dir not empty", output);
256
257 if (options.mods.isEmpty())
258 throw new BadArgs("--mods must be specified").showUsage(true);
259
260 if (moduleGraph.isEmpty())
261 throw new BadArgs("modules.xml must be specified").showUsage(true);
262
263 if (options.cmds == null || options.cmds.isEmpty())
264 warning("--commands is not set");
265 if (options.libs == null || options.libs.isEmpty())
266 warning("--libs is not set");
267 //if (options.configs == null || options.configs.isEmpty())
268 // warning("--configs is not set");
269
270 // additional option combination validation
271
272 boolean ok = run();
273 return ok ? EXIT_OK : EXIT_ERROR;
274 } catch (BadArgs e) {
275 reportError(e.format, e.args);
276 if (e.showUsage)
277 log.println(USAGE_SUMMARY);
278 return EXIT_CMDERR;
279 } catch (Exception x) {
280 x.printStackTrace();
281 return EXIT_ABNORMAL;
282 } finally {
283 log.flush();
284 }
285 }
286
287 private boolean run() throws IOException {
288 createImage();
289 return true;
290 }
291
292 class SimpleResolver {
293 private final Set<Module> initialMods;
294 private final Map<String,Module> nameToModule = new HashMap<>();
295
296 SimpleResolver(Set<String> mods, Set<Module> graph) {
297 graph.stream()
298 .forEach(m -> nameToModule.put(m.name(), m));
299 initialMods = mods.stream()
300 .map(this::nameToModule)
301 .collect(Collectors.toSet());
302 }
303
304 /** Returns the transitive closure, in topological order */
305 List<String> resolve() {
306 List<Module> result = new LinkedList<>();
307 Set<Module> visited = new HashSet<>();
308 Set<Module> done = new HashSet<>();
309 for (Module m : initialMods) {
310 if (!visited.contains(m))
311 visit(m, visited, result, done);
312 }
313 return result.stream()
314 .map(m -> m.name())
315 .collect(Collectors.toList());
316 }
317
318 private void visit(Module m, Set<Module> visited,
319 List<Module> result, Set<Module> done) {
320 if (visited.contains(m)) {
321 if (!done.contains(m))
322 throw new IllegalArgumentException("Cyclic detected: " +
323 m + " " + getModuleDependences(m));
324 return;
325 }
326 visited.add(m);
327 getModuleDependences(m).stream()
328 .forEach(d -> visit(d, visited, result, done));
329 done.add(m);
330 result.add(m);
331 }
332
333 private Module nameToModule(String name) {
334 Module m = nameToModule.get(name);
335 if (m == null)
336 throw new RuntimeException("No module definition for " + name);
337 return m;
338 }
339
340 private Set<Module> getModuleDependences(Module m) {
341 return m.requires().stream()
342 .map(d -> d.name())
343 .map(this::nameToModule)
344 .collect(Collectors.toSet());
345 }
346 }
347
348 private List<String> resolve(Set<String> mods ) {
349 return (new SimpleResolver(mods, moduleGraph)).resolve();
350 }
351
352 private void createImage() throws IOException {
353 Collection<String> modules = resolve(options.mods);
354 log.print(modules.stream().collect(Collectors.joining(" ")));
355 ImageFileHelper imageHelper = new ImageFileHelper(modules);
356 imageHelper.createModularImage(options.output);
357
358 // jspawnhelper, might be in lib or lib/ARCH
359 Path jspawnhelper = Paths.get("jspawnhelper");
360 Path lib = options.output.resolve("lib");
361 Optional<Path> helper = Files.walk(lib, 2)
362 .filter(f -> f.getFileName().equals(jspawnhelper))
363 .findFirst();
364 if (helper.isPresent())
365 helper.get().toFile().setExecutable(true, false);
366 }
367
368 private class ImageFileHelper {
369 final Collection<String> modules;
370 final Set<String> bootModules;
371 final Set<String> extModules;
372 final Set<String> appModules;
373 final ImageModules imf;
374
375 ImageFileHelper(Collection<String> modules) throws IOException {
376 this.modules = modules;
377 this.bootModules = modulesFor(BOOT_MODULES).stream()
378 .filter(modules::contains)
379 .collect(Collectors.toSet());
380 this.extModules = modulesFor(EXT_MODULES).stream()
381 .filter(modules::contains)
382 .collect(Collectors.toSet());
383 this.appModules = modules.stream()
384 .filter(m -> !bootModules.contains(m) && !extModules.contains(m))
385 .collect(Collectors.toSet());
386
387 this.imf = new ImageModules(bootModules, extModules, appModules);
388 }
389
390 void createModularImage(Path output) throws IOException {
391 Set<Archive> archives = modules.stream()
392 .map(this::toModuleArchive)
393 .collect(Collectors.toSet());
394 ImageFile.create(output, archives, imf, options.endian);
395 }
396
397 ModuleArchive toModuleArchive(String mn) {
398 return new ModuleArchive(mn,
399 moduleToPath(mn, options.classes, false/*true*/),
400 moduleToPath(mn, options.cmds, false),
401 moduleToPath(mn, options.libs, false),
402 moduleToPath(mn, options.configs, false));
403 }
404
405 private Path moduleToPath(String name, List<Path> paths, boolean expect) {
406 Set<Path> foundPaths = new HashSet<>();
407 if (paths != null) {
408 for (Path p : paths) {
409 Path rp = p.resolve(name);
410 if (Files.exists(rp))
411 foundPaths.add(rp);
412 }
413 }
414 if (foundPaths.size() > 1)
415 throw new RuntimeException("Found more that one path for " + name);
416 if (expect && foundPaths.size() != 1)
417 throw new RuntimeException("Expected to find classes path for " + name);
418 return foundPaths.size() == 0 ? null : foundPaths.iterator().next();
419 }
420
421 private List<String> modulesFor(String name) throws IOException {
422 try (InputStream is = ImageBuilder.class.getResourceAsStream(name);
423 BufferedReader reader = new BufferedReader(new InputStreamReader(is))) {
424 return reader.lines().collect(Collectors.toList());
425 }
426 }
427 }
428
429 public void handleOptions(String[] args) throws BadArgs {
430 // process options
431 for (int i=0; i < args.length; i++) {
432 if (args[i].charAt(0) == '-') {
433 String name = args[i];
434 Option option = getOption(name);
435 String param = null;
436 if (option.hasArg) {
437 if (name.startsWith("--") && name.indexOf('=') > 0) {
438 param = name.substring(name.indexOf('=') + 1, name.length());
439 } else if (i + 1 < args.length) {
440 param = args[++i];
441 }
442 if (param == null || param.isEmpty() || param.charAt(0) == '-') {
443 throw new BadArgs("Missing arg for %n", name).showUsage(true);
444 }
445 }
446 option.process(this, name, param);
447 if (option.ignoreRest()) {
448 i = args.length;
449 }
450 } else {
451 // process rest of the input arguments
452 Path p = Paths.get(args[i]);
453 try {
454 moduleGraph.addAll(ModulesXmlReader.readModules(p)
455 .stream()
456 .collect(Collectors.toSet()));
457 } catch (Exception e) {
458 throw new RuntimeException(e);
459 }
460 }
461 }
462 }
463
464 private Option getOption(String name) throws BadArgs {
465 for (Option o : recognizedOptions) {
466 if (o.matches(name)) {
467 return o;
468 }
469 }
470 throw new BadArgs("Unknown option %s", name).showUsage(true);
471 }
472
473 private void reportError(String format, Object... args) {
474 log.format("Error: " + format + "%n", args);
475 }
476
477 private void warning(String format, Object... args) {
478 log.format("Warning: " + format + "%n", args);
479 }
480
481 private static final String USAGE =
482 "ImageBuilder <options> --output <path> path-to-modules-xml\n";
483
484 private static final String USAGE_SUMMARY =
485 USAGE + "Use --help for a list of possible options.";
486
487 private void showHelp() {
488 log.format(USAGE);
489 log.format("Possible options are:%n");
490 for (Option o : recognizedOptions) {
491 String name = o.aliases[0].substring(1); // there must always be at least one name
492 name = name.charAt(0) == '-' ? name.substring(1) : name;
493 if (o.isHidden() || name.equals("h"))
494 continue;
495
496 log.format(" --%s\t\t\t%s%n", name, o.description());
497 }
498 }
499 }