/* * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * 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). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package org.openjdk.buildtools.symbolgenerator; import java.io.IOException; import java.io.PrintWriter; import java.io.Writer; import java.nio.charset.Charset; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; import java.util.ArrayDeque; import java.util.Arrays; import java.util.Deque; import java.util.HashSet; import java.util.LinkedList; import java.util.List; import java.util.Locale; import java.util.Set; import java.util.stream.Collectors; import javax.lang.model.element.ModuleElement.RequiresDirective; import javax.lang.model.util.Elements; import javax.tools.JavaCompiler; import com.sun.tools.javac.api.JavacTaskImpl; import com.sun.tools.javac.api.JavacTool; import com.sun.tools.javac.code.Source; import com.sun.tools.javac.code.Symbol.ModuleSymbol; import com.sun.tools.javac.jvm.Target; /** * Write reflexive transitive closure of the given modules along their requires transitive edges into * file /system-modules in the specified directory. */ public class TransitiveDependencies { private static void help() { System.err.println("java TransitiveDependencies "); } public static void main(String... args) throws IOException { if (args.length < 2) { help(); return ; } JavaCompiler compiler = JavacTool.create(); List options = List.of("-source", Source.DEFAULT.name, "-target", Target.DEFAULT.name, "-proc:only", "--system", "none", "--module-source-path", args[1], "--add-modules", Arrays.stream(args) .skip(2) .collect(Collectors.joining(","))); List jlObjectList = List.of("java.lang.Object"); JavacTaskImpl task = (JavacTaskImpl) compiler.getTask(null, null, null, options, jlObjectList, null); task.enter(); Elements elements = task.getElements(); Deque todo = new ArrayDeque<>(); Arrays.stream(args).skip(2).forEach(todo::add); Set allModules = new HashSet<>(); while (!todo.isEmpty()) { String current = todo.removeFirst(); if (!allModules.add(current)) continue; ModuleSymbol mod = (ModuleSymbol) elements.getModuleElement(current); if (mod == null) { throw new IllegalStateException("Missing: " + current); } //use the internal structure to avoid unnecesarily completing the symbol using the UsesProvidesVisitor: for (RequiresDirective rd : mod.requires) { if (rd.isTransitive()) { todo.offerLast(rd.getDependency().getQualifiedName().toString()); } } } allModules.add("java.base"); allModules.add("jdk.unsupported"); String version = Integer.toString(Integer.parseInt(Source.DEFAULT.name), Character.MAX_RADIX); version = version.toUpperCase(Locale.ROOT); Path targetFile = Paths.get(args[0]).resolve(version).resolve("system-modules"); Files.createDirectories(targetFile.getParent()); try (Writer w = Files.newBufferedWriter(targetFile); PrintWriter out = new PrintWriter(w)) { allModules.stream() .sorted() .forEach(out::println); } } }