/*

 * Copyright 1999-2001 Sun Microsystems, Inc.  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.

 *

 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

// This program reads an include file database.

// The database should cover each self .c and .h file,

//   but not files in /usr/include

// The database consists of pairs of nonblank words, where the first word is

//   the filename that needs to include the file named by the second word.

// For each .c file, this program generates a fooIncludes.h file that

//  the .c file may include to include all the needed files in the right order.

// It also generates a foo.dep file to include in the makefile.

// Finally it detects cycles, and can work with two files, an old and a new one.

// To incrementally write out only needed files after a small change.

//

// Based on a suggestion by Roland Conybeare, algorithm suggested by Craig

//  Chambers, written by David Ungar, 3/1/89.

//  Added PREFIX, {DEP/INC}_DIR, smaller dep output  10/92  -Urs

// Add something for precompiled headers

// To handle different platforms, I am introducing a platform file.

// The platform file contains lines like:

// os = svr4

//

// Then, when processing the includeDB file, a token such as <os>

// gets replaced by svr4. -- dmu 3/25/97

// Modified to centralize Dependencies to speed up make -- dmu 5/97

public class MakeDeps {

    public static void usage() {

        System.out.println("usage:");

        System.out.println("\tmakeDeps platform-name     platform-file     database-file [MakeDeps args] [platform args]");

        System.out.println("\tmakeDeps diffs platform-name old-platform-file old-database-file new-platform-file new-database-file [MakeDeps args] [platform args]");

        System.out.println("where platform-name is the name of a platform MakeDeps supports");

        System.out.println("(currently \"WinGammaPlatform\" or \"UnixPlatform\")");

        System.out.println("MakeDeps options:");

        System.out.println("  -firstFile [filename]: Specify the first file in link order (i.e.,");

        System.out.println("   to have a well-known function at the start of the output file)");

        System.out.println("  -lastFile [filename]: Specify the last file in link order (i.e.,");

        System.out.println("   to have a well-known function at the end of the output file)");

        System.err.println("WinGammaPlatform platform-specific options:");

        System.err.println("  -sourceBase <path to directory (workspace) " +

                           "containing source files; no trailing slash>");

        System.err.println("  -dspFileName <full pathname to which .dsp file " +

                           "will be written; all parent directories must " +

                           "already exist>");

        System.err.println("  -envVar <environment variable to be inserted " +

                           "into .dsp file, substituting for path given in " +

                           "-sourceBase. Example: HotSpotWorkSpace>");

        System.err.println("  -dllLoc <path to directory in which to put " +

                           "jvm.dll and jvm_g.dll; no trailing slash>");

        System.err.println("  If any of the above are specified, "+

                           "they must all be.");

        System.err.println("  Additional, optional arguments, which can be " +

                           "specified multiple times:");

        System.err.println("    -absoluteInclude <string containing absolute " +

                           "path to include directory>");

        System.err.println("    -relativeInclude <string containing include " +

                           "directory relative to -envVar>");

        System.err.println("    -define <preprocessor flag to be #defined " +

                           "(note: doesn't yet support " +

                           "#define (flag) (value))>");

        System.err.println("    -perFileLine <file> <line>");

        System.err.println("    -conditionalPerFileLine <file> <line for " +

                           "release build> <line for debug build>");

        System.err.println("  (NOTE: To work around a bug in nmake, where " +

                           "you can't have a '#' character in a quoted " +

                           "string, all of the lines outputted have \"#\"" +

                           "prepended)");

        System.err.println("    -startAt <subdir of sourceBase>");

        System.err.println("    -ignoreFile <file which won't be able to be " +

                           "found in the sourceBase because it's generated " +

                           "later>");

        System.err.println("    -additionalFile <file not in database but " +

                           "which should show up in .dsp file, like " +

                           "includeDB_core>");

        System.err.println("    -additionalGeneratedFile <environment variable of " +

                           "generated file's location> <relative path to " +

                           "directory containing file; no trailing slash> " +

                           "<name of file generated later in the build process>");

        System.err.println("    -prelink <build> <desc> <cmds>:");

        System.err.println(" Generate a set of prelink commands for the given BUILD");

        System.err.println(" (\"Debug\" or \"Release\"). The prelink description and commands");

        System.err.println(" are both quoted strings.");

        System.err.println("    Default includes: \".\"");

        System.err.println("    Default defines: WIN32, _WINDOWS, \"HOTSPOT_BUILD_USER=$(USERNAME)\"");

    }

    public static void main(String[] args) {

        try {

            if (args.length < 3) {

                usage();

                System.exit(1);

            }

            int argc = 0;

            boolean diffMode = false;

            if (args[argc].equals("diffs")) {

                diffMode = true;

                ++argc;

            }

            String platformName = args[argc++];

            Class platformClass = Class.forName(platformName);

            String plat1 = null;

            String db1 = null;

            String plat2 = null;

            String db2 = null;

            String firstFile = null;

            String lastFile = null;

            int numOptionalArgs =

                (diffMode ? (args.length - 6) : (args.length - 3));

            if (numOptionalArgs < 0) {

                usage();

                System.exit(1);

            }

            plat1 = args[argc++];

            db1   = args[argc++];

            if (diffMode) {

              plat2 = args[argc++];

              db2   = args[argc++];

            }

            // argc now points at start of optional arguments, if any

            try {

              boolean gotOne = true;

              while (gotOne && (argc < args.length - 1)) {

                gotOne = false;

                String arg = args[argc];

                if (arg.equals("-firstFile")) {

                  firstFile = args[argc + 1];

                  argc += 2;

                  gotOne = true;

                } else if (arg.equals("-lastFile")) {

                  lastFile = args[argc + 1];

                  argc += 2;

                  gotOne = true;

                }

              }

            }

            catch (Exception e) {

              e.printStackTrace();

              usage();

              System.exit(1);

            }

            Platform platform = (Platform) platformClass.newInstance();

            platform.setupFileTemplates();

            long t = platform.defaultGrandIncludeThreshold();

            String[] platformArgs = null;

            int numPlatformArgs = args.length - argc;

            if (numPlatformArgs > 0) {

                platformArgs = new String[numPlatformArgs];

                int offset = argc;

                while (argc < args.length) {

                  platformArgs[argc - offset] = args[argc];

                  ++argc;

                }

            }

            // If you want to change the threshold, change the default

            // "grand include" threshold in Platform.java, or override

            // it in the platform-specific file like UnixPlatform.java

            Database previous = new Database(platform, t);

            Database current = new Database(platform, t);

            previous.canBeMissing();

            if (firstFile != null) {

              previous.setFirstFile(firstFile);

              current.setFirstFile(firstFile);

            }

            if (lastFile != null) {

              previous.setLastFile(lastFile);

              current.setLastFile(lastFile);

            }

            if (diffMode) {

                System.out.println("Old database:");

                previous.get(plat1, db1);

                previous.compute();

                System.out.println("New database:");

                current.get(plat2, db2);

                current.compute();

                System.out.println("Deltas:");

                current.putDiffs(previous);

            } else {

                System.out.println("New database:");

                current.get(plat1, db1);

                current.compute();

                current.put();

            }

            if (platformArgs != null) {

                // Allow the platform to write platform-specific files

                platform.writePlatformSpecificFiles(previous, current,

                                                    platformArgs);

            }

        }

        catch (Exception e) {

            e.printStackTrace();

              System.exit(1);

        }

    }

}