author | ohrstrom |
Fri, 08 Aug 2014 20:47:24 +0200 | |
changeset 26087 | 93e7681752f6 |
parent 25299 | b4a7dcd657f5 |
child 26088 | f479ca655ba1 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.sjavac; |
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import java.io.IOException; |
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import java.io.PrintStream; |
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import java.util.*; |
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import java.nio.file.Path; |
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import java.nio.file.Files; |
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import com.sun.tools.sjavac.options.Options; |
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import com.sun.tools.sjavac.options.SourceLocation; |
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import com.sun.tools.sjavac.server.JavacService; |
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import com.sun.tools.sjavac.server.JavacServer; |
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import com.sun.tools.sjavac.server.JavacServiceClient; |
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/** |
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* The main class of the smart javac wrapper tool. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own |
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* risk. This code and its internal interfaces are subject to change |
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* or deletion without notice.</b></p> |
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*/ |
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public class Main { |
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|
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/* This is a smart javac wrapper primarily used when building the OpenJDK, |
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though other projects are welcome to use it too. But please be aware |
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that it is not an official api and will change in the future. |
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(We really mean it!) |
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|
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Goals: |
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|
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** Create a state file, containing information about the build, so |
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that incremental builds only rebuild what is necessary. Also the |
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state file can be used by make/ant to detect when to trigger |
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a call to the smart javac wrapper. |
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|
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This file is called bin/javac_state (assuming that you specified "-d bin") |
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Thus the simplest makefile is: |
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SJAVAC=java -cp .../tools.jar com.sun.tools.sjavac.Main |
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SRCS=$(shell find src -name "*.java") |
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bin/javac_state : $(SRCS) |
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$(SJAVAC) src -d bin |
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This makefile will run very fast and detect properly when Java code needs to |
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be recompiled. The smart javac wrapper will then use the information in java_state |
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to do an efficient incremental compile. |
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|
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Previously it was near enough impossible to write an efficient makefile for Java |
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with support for incremental builds and dependency tracking. |
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** Separate java sources to be compiled from java |
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sources used >only< for linking. The options: |
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|
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"dir" points to root dir with sources to be compiled |
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"-sourcepath dir" points to root dir with sources used only for linking |
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"-classpath dir" points to dir with classes used only for linking (as before) |
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|
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** Use all cores for compilation by default. |
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"-j 4" limit the number of cores to 4. |
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For the moment, the sjavac server additionally limits the number of cores to three. |
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This will improve in the future when more sharing is performed between concurrent JavaCompilers. |
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** Basic translation support from other sources to java, and then compilation of the generated java. |
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This functionality might be moved into annotation processors instead. |
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Again this is driven by the OpenJDK sources where properties and a few other types of files |
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are converted into Java sources regularily. The javac_state embraces copy and tr, and perform |
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incremental recompiles and copying for these as well. META-INF will be a special copy rule |
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that will copy any files found below any META-INF dir in src to the bin/META-INF dir. |
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"-copy .gif" |
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"-copy META-INF" |
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"-tr .prop=com.sun.tools.javac.smart.CompileProperties |
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"-tr .propp=com.sun.tools.javac.smart.CompileProperties,java.util.ListResourceBundle |
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"-tr .proppp=com.sun.tools.javac.smart.CompileProperties,sun.util.resources.LocaleNamesBundle |
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** Control which classes in the src,sourcepath and classpath that javac is allowed to see. |
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Again, this is necessary to deal with the source code structure of the OpenJDK which is |
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intricate (read messy). |
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"-i tools.*" to include the tools package and all its subpackages in the build. |
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"-x tools.net.aviancarrier.*" to exclude the aviancarrier package and all its sources and subpackages. |
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"-x tools.net.drums" to exclude the drums package only, keep its subpackages. |
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"-xf tools/net/Bar.java" // Do not compile this file... |
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"-xf *Bor.java" // Do not compile Bor.java wherever it is found, BUT do compile ABor.java! |
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"-if tools/net/Bor.java" // Only compile this file...odd, but sometimes used. |
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** The smart javac wrapper is driven by the modification time on the source files and compared |
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to the modification times written into the javac_state file. |
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It does not compare the modification time of the source with the modification time of the artifact. |
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However it will detect if the modification time of an artifact has changed compared to the java_state, |
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and this will trigger a delete of the artifact and a subsequent recompile of the source. |
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The smart javac wrapper is not a generic makefile/ant system. Its purpose is to compile java source |
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as the final step before the output dir is finalized and immediately jared, or jmodded. The output |
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dir should be considered opaque. Do not write into the outputdir yourself! |
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Any artifacts found in the outputdir that javac_state does not know of, will be deleted! |
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This can however be prevented, using the switch --permit-unidentified-artifacts |
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This switch is necessary when build the OpenJDK because its makefiles still write directly to |
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the output classes dirs. |
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Any makefile/ant rules that want to put contents into the outputdir should put the content |
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in one of several source roots. Static content that is under version control, can be put in the same source |
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code tree as the Java sources. Dynamic content that is generated by make/ant on the fly, should |
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be put in a separate gensrc_stuff root. The smart javac wrapper call will then take the arguments: |
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"gensrc_stuff src -d bin" |
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|
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The command line: |
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java -cp tools.jar com.sun.tools.sjavac.Main \ |
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-i "com.bar.*" -x "com.bar.foo.*" \ |
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first_root \ |
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-i "com.bar.foo.*" \ |
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second_root \ |
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-x "org.net.*" \ |
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-sourcepath link_root_sources \ |
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-classpath link_root_classes \ |
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-d bin |
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|
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Will compile all sources for package com.bar and its subpackages, found below first_root, |
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except the package com.bar.foo (and its subpackages), for which the sources are picked |
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from second_root instead. It will link against classes in link_root_classes and against |
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sources in link_root_sources, but will not see (try to link against) sources matching org.net.* |
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but will link against org.net* classes (if they exist) in link_root_classes. |
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|
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(If you want a set of complex filter rules to be applied to several source directories, without |
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having to repeat the the filter rules for each root. You can use the explicit -src option. For example: |
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sjavac -x "com.foo.*" -src root1:root2:root3 ) |
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|
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The resulting classes are written into bin. |
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*/ |
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|
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private JavacState javac_state; |
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|
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public static void main(String... args) { |
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if (args.length > 0 && args[0].startsWith("--startserver:")) { |
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if (args.length>1) { |
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Log.error("When spawning a background server, only a single --startserver argument is allowed."); |
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return; |
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} |
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// Spawn a background server. |
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int rc = JavacServer.startServer(args[0], System.err); |
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System.exit(rc); |
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} |
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Main main = new Main(); |
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int rc = main.go(args, System.out, System.err); |
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// Remove the portfile, but only if this background=false was used. |
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JavacServer.cleanup(args); |
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System.exit(rc); |
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} |
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|
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private void printHelp() { |
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System.out.println("Usage: sjavac <options>\n"+ |
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"where required options are:\n"+ |
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"dir Compile all sources in dir recursively\n"+ |
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"-d dir Store generated classes here and the javac_state file\n"+ |
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"--server:portfile=/tmp/abc Use a background sjavac server\n\n"+ |
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"All other arguments as javac, except -implicit:none which is forced by default.\n"+ |
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"No java source files can be supplied on the command line, nor can an @file be supplied.\n\n"+ |
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"Warning!\n"+ |
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"This tool might disappear at any time, and its command line options might change at any time!"); |
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} |
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|
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public int go(String[] args, PrintStream out, PrintStream err) { |
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|
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Log.initializeLog(out, err); |
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|
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Options options; |
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try { |
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options = Options.parseArgs(args); |
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} catch (IllegalArgumentException e) { |
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Log.error(e.getMessage()); |
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return -1; |
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} |
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|
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Log.setLogLevel(options.getLogLevel()); |
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|
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if (!validateOptions(options)) |
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return -1; |
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|
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if (!createIfMissing(options.getDestDir())) |
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return -1; |
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|
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Path gensrc = options.getGenSrcDir(); |
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if (gensrc != null && !createIfMissing(gensrc)) |
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return -1; |
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|
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Path hdrdir = options.getHeaderDir(); |
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if (hdrdir != null && !createIfMissing(hdrdir)) |
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return -1; |
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|
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// Load the prev build state database. |
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javac_state = JavacState.load(options, out, err); |
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|
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// Setup the suffix rules from the command line. |
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Map<String, Transformer> suffixRules = new HashMap<>(); |
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|
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// Handling of .java-compilation |
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suffixRules.putAll(javac_state.getJavaSuffixRule()); |
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|
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// Handling of -copy and -tr |
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suffixRules.putAll(options.getTranslationRules()); |
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|
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// All found modules are put here. |
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Map<String,Module> modules = new HashMap<>(); |
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// We start out in the legacy empty no-name module. |
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// As soon as we stumble on a module-info.java file we change to that module. |
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Module current_module = new Module("", ""); |
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modules.put("", current_module); |
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// Find all sources, use the suffix rules to know which files are sources. |
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Map<String,Source> sources = new HashMap<>(); |
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|
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// Find the files, this will automatically populate the found modules |
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// with found packages where the sources are found! |
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findSourceFiles(options.getSources(), |
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suffixRules.keySet(), |
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sources, |
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modules, |
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current_module, |
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options.isDefaultPackagePermitted(), |
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false); |
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|
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if (sources.isEmpty()) { |
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Log.error("Found nothing to compile!"); |
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return -1; |
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251 |
} |
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|
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// Create a map of all source files that are available for linking. Both -src and |
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// -sourcepath point to such files. It is possible to specify multiple |
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// -sourcepath options to enable different filtering rules. If the |
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256 |
// filters are the same for multiple sourcepaths, they may be concatenated |
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// using :(;). Before sending the list of sourcepaths to javac, they are |
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// all concatenated. The list created here is used by the SmartFileWrapper to |
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// make sure only the correct sources are actually available. |
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// We might find more modules here as well. |
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Map<String,Source> sources_to_link_to = new HashMap<>(); |
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262 |
|
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List<SourceLocation> sourceResolutionLocations = new ArrayList<>(); |
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sourceResolutionLocations.addAll(options.getSources()); |
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sourceResolutionLocations.addAll(options.getSourceSearchPaths()); |
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findSourceFiles(sourceResolutionLocations, |
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Collections.singleton(".java"), |
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sources_to_link_to, |
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modules, |
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current_module, |
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options.isDefaultPackagePermitted(), |
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true); |
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273 |
|
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// Find all class files allowable for linking. |
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// And pickup knowledge of all modules found here. |
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// This cannot currently filter classes inside jar files. |
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// Map<String,Source> classes_to_link_to = new HashMap<String,Source>(); |
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// findFiles(args, "-classpath", Util.set(".class"), classes_to_link_to, modules, current_module, true); |
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279 |
|
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280 |
// Find all module sources allowable for linking. |
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281 |
// Map<String,Source> modules_to_link_to = new HashMap<String,Source>(); |
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// findFiles(args, "-modulepath", Util.set(".class"), modules_to_link_to, modules, current_module, true); |
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283 |
|
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// Add the set of sources to the build database. |
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285 |
javac_state.now().flattenPackagesSourcesAndArtifacts(modules); |
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286 |
javac_state.now().checkInternalState("checking sources", false, sources); |
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287 |
javac_state.now().checkInternalState("checking linked sources", true, sources_to_link_to); |
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288 |
javac_state.setVisibleSources(sources_to_link_to); |
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289 |
|
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290 |
// If there is any change in the source files, taint packages |
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291 |
// and mark the database in need of saving. |
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292 |
javac_state.checkSourceStatus(false); |
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293 |
|
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294 |
// Find all existing artifacts. Their timestamp will match the last modified timestamps stored |
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295 |
// in javac_state, simply because loading of the JavacState will clean out all artifacts |
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296 |
// that do not match the javac_state database. |
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297 |
javac_state.findAllArtifacts(); |
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298 |
|
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299 |
// Remove unidentified artifacts from the bin, gensrc and header dirs. |
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300 |
// (Unless we allow them to be there.) |
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301 |
// I.e. artifacts that are not known according to the build database (javac_state). |
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302 |
// For examples, files that have been manually copied into these dirs. |
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303 |
// Artifacts with bad timestamps (ie the on disk timestamp does not match the timestamp |
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304 |
// in javac_state) have already been removed when the javac_state was loaded. |
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305 |
if (!options.isUnidentifiedArtifactPermitted()) { |
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306 |
javac_state.removeUnidentifiedArtifacts(); |
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307 |
} |
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308 |
// Go through all sources and taint all packages that miss artifacts. |
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|
309 |
javac_state.taintPackagesThatMissArtifacts(); |
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310 |
|
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311 |
// Now clean out all known artifacts belonging to tainted packages. |
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312 |
javac_state.deleteClassArtifactsInTaintedPackages(); |
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313 |
// Copy files, for example property files, images files, xml files etc etc. |
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314 |
javac_state.performCopying(Util.pathToFile(options.getDestDir()), suffixRules); |
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|
315 |
// Translate files, for example compile properties or compile idls. |
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|
316 |
javac_state.performTranslation(Util.pathToFile(gensrc), suffixRules); |
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|
317 |
// Add any potentially generated java sources to the tobe compiled list. |
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|
318 |
// (Generated sources must always have a package.) |
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|
319 |
Map<String,Source> generated_sources = new HashMap<>(); |
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|
320 |
|
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|
321 |
try { |
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|
322 |
|
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323 |
Source.scanRoot(Util.pathToFile(options.getGenSrcDir()), Util.set(".java"), null, null, null, null, |
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324 |
generated_sources, modules, current_module, false, true, false); |
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325 |
javac_state.now().flattenPackagesSourcesAndArtifacts(modules); |
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|
326 |
// Recheck the the source files and their timestamps again. |
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|
327 |
javac_state.checkSourceStatus(true); |
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|
328 |
|
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|
329 |
// Now do a safety check that the list of source files is identical |
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|
330 |
// to the list Make believes we are compiling. If we do not get this |
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|
331 |
// right, then incremental builds will fail with subtility. |
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|
332 |
// If any difference is detected, then we will fail hard here. |
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|
333 |
// This is an important safety net. |
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|
334 |
javac_state.compareWithMakefileList(Util.pathToFile(options.getSourceReferenceList())); |
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|
335 |
|
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|
336 |
// Do the compilations, repeatedly until no tainted packages exist. |
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|
337 |
boolean again; |
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|
338 |
// Collect the name of all compiled packages. |
22163 | 339 |
Set<String> recently_compiled = new HashSet<>(); |
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|
340 |
boolean[] rc = new boolean[1]; |
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|
341 |
do { |
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|
342 |
// Clean out artifacts in tainted packages. |
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|
343 |
javac_state.deleteClassArtifactsInTaintedPackages(); |
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344 |
// Create a JavacService to delegate the actual compilation to. |
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345 |
// Currently sjavac always connects to a server through a socket |
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346 |
// regardless if sjavac runs as a background service or not. |
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347 |
// This will most likely change in the future. |
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348 |
JavacService javacService = new JavacServiceClient(options.getServerConf()); |
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349 |
again = javac_state.performJavaCompilations(javacService, options, recently_compiled, rc); |
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|
350 |
if (!rc[0]) break; |
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|
351 |
} while (again); |
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|
352 |
// Only update the state if the compile went well. |
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|
353 |
if (rc[0]) { |
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|
354 |
javac_state.save(); |
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355 |
// Reflatten only the artifacts. |
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356 |
javac_state.now().flattenArtifacts(modules); |
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|
357 |
// Remove artifacts that were generated during the last compile, but not this one. |
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|
358 |
javac_state.removeSuperfluousArtifacts(recently_compiled); |
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|
359 |
} |
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|
360 |
return rc[0] ? 0 : -1; |
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|
361 |
} catch (ProblemException e) { |
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|
362 |
Log.error(e.getMessage()); |
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|
363 |
return -1; |
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|
364 |
} catch (Exception e) { |
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|
365 |
e.printStackTrace(err); |
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|
366 |
return -1; |
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|
367 |
} |
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|
368 |
} |
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|
369 |
|
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370 |
private static boolean validateOptions(Options options) { |
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|
371 |
|
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|
372 |
String err = null; |
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|
373 |
|
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374 |
if (options.getDestDir() == null) { |
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|
375 |
err = "Please specify output directory."; |
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376 |
} else if (options.isJavaFilesAmongJavacArgs()) { |
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377 |
err = "Sjavac does not handle explicit compilation of single .java files."; |
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378 |
} else if (options.getServerConf() == null) { |
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err = "No server configuration provided."; |
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380 |
} else if (!options.getImplicitPolicy().equals("none")) { |
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err = "The only allowed setting for sjavac is -implicit:none"; |
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382 |
} else if (options.getSources().isEmpty()) { |
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383 |
err = "You have to specify -src."; |
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384 |
} else if (options.getTranslationRules().size() > 1 |
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385 |
&& options.getGenSrcDir() == null) { |
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386 |
err = "You have translators but no gensrc dir (-s) specified!"; |
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387 |
} |
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changeset
|
388 |
|
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389 |
if (err != null) |
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390 |
Log.error(err); |
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changeset
|
391 |
|
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392 |
return err == null; |
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changeset
|
393 |
|
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8004658: Add internal smart javac wrapper to solve JEP 139
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changeset
|
394 |
} |
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changeset
|
395 |
|
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396 |
private static boolean createIfMissing(Path dir) { |
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changeset
|
397 |
|
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|
398 |
if (Files.isDirectory(dir)) |
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|
399 |
return true; |
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changeset
|
400 |
|
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changeset
|
401 |
if (Files.exists(dir)) { |
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|
402 |
Log.error(dir + " is not a directory."); |
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changeset
|
403 |
return false; |
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changeset
|
404 |
} |
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changeset
|
405 |
|
24067
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|
406 |
try { |
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changeset
|
407 |
Files.createDirectories(dir); |
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|
408 |
} catch (IOException e) { |
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changeset
|
409 |
Log.error("Could not create directory: " + e.getMessage()); |
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changeset
|
410 |
return false; |
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changeset
|
411 |
} |
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changeset
|
412 |
|
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parents:
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changeset
|
413 |
return true; |
2577ddb7e710
8004658: Add internal smart javac wrapper to solve JEP 139
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parents:
diff
changeset
|
414 |
} |
2577ddb7e710
8004658: Add internal smart javac wrapper to solve JEP 139
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parents:
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changeset
|
415 |
|
2577ddb7e710
8004658: Add internal smart javac wrapper to solve JEP 139
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parents:
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changeset
|
416 |
|
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changeset
|
417 |
/** Find source files in the given source locations. */ |
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|
418 |
public static void findSourceFiles(List<SourceLocation> sourceLocations, |
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changeset
|
419 |
Set<String> sourceTypes, |
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changeset
|
420 |
Map<String,Source> foundFiles, |
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changeset
|
421 |
Map<String, Module> foundModules, |
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changeset
|
422 |
Module currentModule, |
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changeset
|
423 |
boolean permitSourcesInDefaultPackage, |
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8035063: Option handling in sjavac needs to be rewritten
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changeset
|
424 |
boolean inLinksrc) { |
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changeset
|
425 |
|
24067
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changeset
|
426 |
for (SourceLocation source : sourceLocations) { |
76e7b6bbbd85
8035063: Option handling in sjavac needs to be rewritten
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changeset
|
427 |
source.findSourceFiles(sourceTypes, |
76e7b6bbbd85
8035063: Option handling in sjavac needs to be rewritten
alundblad
parents:
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diff
changeset
|
428 |
foundFiles, |
76e7b6bbbd85
8035063: Option handling in sjavac needs to be rewritten
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parents:
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diff
changeset
|
429 |
foundModules, |
76e7b6bbbd85
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alundblad
parents:
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diff
changeset
|
430 |
currentModule, |
76e7b6bbbd85
8035063: Option handling in sjavac needs to be rewritten
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parents:
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diff
changeset
|
431 |
permitSourcesInDefaultPackage, |
76e7b6bbbd85
8035063: Option handling in sjavac needs to be rewritten
alundblad
parents:
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diff
changeset
|
432 |
inLinksrc); |
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parents:
diff
changeset
|
433 |
} |
2577ddb7e710
8004658: Add internal smart javac wrapper to solve JEP 139
ohrstrom
parents:
diff
changeset
|
434 |
} |
2577ddb7e710
8004658: Add internal smart javac wrapper to solve JEP 139
ohrstrom
parents:
diff
changeset
|
435 |
} |