Fix javac --incremental by using jmake for dependency analysis

third_party/jmake/src/org/pantsbuild/jmake/Main.java

+/* Copyright (c) 2002-2008 Sun Microsystems, Inc. All rights reserved
+ *
+ * This program is distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+package org.pantsbuild.jmake;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.io.Reader;
+import java.io.StreamTokenizer;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The main class of the <b>jmake</b> tool.<p>
+ *
+ * Has several entrypoints: <code>main</code>, <code>mainExternal</code>, <code>mainProgrammatic</code>,
+ * <code>mainExternalControlled</code> and <code>mainProgrammaticControlled</code>.
+ * The first is not intended to be used by applications other than <b>jmake</b> itself, whereas the
+ * rest can be used to call <b>jmake</b> externally with various degrees of control over its behaviour.
+ * See method comments for more details.
+ *
+ * @author Misha Dmitriev
+ *  12 October 2004
+ */
+public class Main {
+
+    static final String DEFAULT_STORE_NAME = "jmake.pdb";
+    static final String VERSION = "1.3.8-11";
+    private String pdbFileName = null;
+    private List<String> allProjectJavaFileNamesList =
+            new ArrayList<String>(100);
+    private String allProjectJavaFileNames[];
+    private String addedJavaFileNames[],  removedJavaFileNames[],  updatedJavaFileNames[];
+    private String destDir = "";
+    private List<String> javacAddArgs = new ArrayList<String>();
+    private String jcPath,  jcMainClass,  jcMethod;
+    private String jcExecApp;
+    boolean controlledExecution = false;
+    Object externalApp = null;
+    Method externalCompileSourceFilesMethod = null;
+    private boolean failOnDependentJar = false,  noWarnOnDependentJar = false;
+    private boolean pdbTextFormat = false;
+    private PCDManager pcdm = null;
+    private String dependencyFile;
+    private static final String optNames[] = {"-h", "-help", "-d", "-pdb", "-C", "-jcpath", "-jcmainclass", "-jcmethod", "-jcexec", "-Xtiming", "-version",
+        "-warnlimit", "-failondependentjar", "-nowarnondependentjar", "-classpath", "-projclasspath", "-bootclasspath", "-extdirs", "-vpath", "-pdb-text-format",
+        "-depfile"};
+    private static final int optArgs[] = {0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1};
+    private static final int OPT_H = 0;
+    private static final int OPT_HELP = 1;
+    private static final int OPT_D = 2;
+    private static final int OPT_STORE = 3;
+    private static final int OPT_JAVAC_OPT = 4;
+    private static final int OPT_JCPATH = 5;
+    private static final int OPT_JCMAINCLASS = 6;
+    private static final int OPT_JCMETHOD = 7;
+    private static final int OPT_JCEXEC = 8;
+    private static final int OPT_TIMING = 9;
+    private static final int OPT_VERSION = 10;
+    private static final int OPT_WARNLIMIT = 11;
+    private static final int OPT_FAILONDEPJAR = 12;
+    private static final int OPT_NOWARNONDEPJAR = 13;
+    private static final int OPT_CLASSPATH = 14;
+    private static final int OPT_PROJECTCLASSPATH = 15;
+    private static final int OPT_BOOTCLASSPATH = 16;
+    private static final int OPT_EXTDIRS = 17;
+    private static final int OPT_VPATH = 18;
+    private static final int OPT_PDB_TEXT_FORMAT = 19;
+    private static final int OPT_DEPENDENCY_FILE = 20;
+
+    /** Construct a new instance of Main. */
+    public Main() {
+    }
+
+    /**
+     * Checks whether the argument is a legal jmake option. Returns its number or
+     * -1 if not found.
+     */
+    private static int inOptions(String option) {
+        if (option.startsWith(optNames[OPT_JAVAC_OPT])) {
+            return OPT_JAVAC_OPT;
+        }
+        for (int i = 0; i < optNames.length; i++) {
+            if (option.equals(optNames[i])) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    private void processCommandLine(String args[]) {
+        if ((args.length == 0) || (args.length == 1 && args[0].equals(optNames[OPT_HELP]))) {
+            printUsage();
+            throw new PrivateException(new PublicExceptions.NoActionRequestedException());
+        }
+
+        List<String> argsV = new ArrayList<String>();
+        for (int i = 0; i < args.length; i++) {
+            argsV.add(args[i]);
+        }
+        int argsSt = 0;
+        String arg;
+
+        while (argsSt < argsV.size()) {
+            arg = argsV.get(argsSt++);
+            if (arg.charAt(0) == '-') {
+                int argN = inOptions(arg);
+                if (argN != -1) {
+                    if (argsSt + optArgs[argN] > argsV.size()) {
+                        optRequiresArg("\"" + optNames[argN] + "\"");
+                    }
+                } else {
+                    bailOut(arg + ERR_IS_INVALID_OPTION);
+                }
+
+                switch (argN) {
+                    case OPT_H:
+                    case OPT_HELP:
+                        printUsage();
+                        throw new PrivateException(new PublicExceptions.NoActionRequestedException());
+                    case OPT_D:
+                        destDir = argsV.get(argsSt);
+                        javacAddArgs.add("-d");
+                        javacAddArgs.add(argsV.get(argsSt));
+                        argsSt++;
+                        break;
+                    case OPT_CLASSPATH:
+                        try {
+                            setClassPath(argsV.get(argsSt++));
+                        } catch (PublicExceptions.InvalidCmdOptionException ex) {
+                            bailOut(ex.getMessage());
+                        }
+                        break;
+                    case OPT_PROJECTCLASSPATH:
+                        try {
+                            setProjectClassPath(argsV.get(argsSt++));
+                        } catch (PublicExceptions.InvalidCmdOptionException ex) {
+                            bailOut(ex.getMessage());
+                        }
+                        break;
+                    case OPT_STORE:
+                        pdbFileName = argsV.get(argsSt++);
+                        break;
+                    case OPT_JAVAC_OPT:
+                        String javacArg =
+                                (argsV.get(argsSt - 1)).substring(2);
+                        if (javacArg.equals("-d") ||
+                                javacArg.equals("-classpath") ||
+                                javacArg.equals("-bootclasspath") ||
+                                javacArg.equals("-extdirs")) {
+                            bailOut(javacArg + ERR_SHOULD_BE_EXPLICIT);
+                        }
+                        javacAddArgs.add(javacArg);
+                        break;
+                    case OPT_JCPATH:
+                        if (jcExecApp != null) {
+                            bailOut(ERR_NO_TWO_COMPILER_OPTIONS);
+                        }
+                        jcPath = argsV.get(argsSt++);
+                        break;
+                    case OPT_JCMAINCLASS:
+                        if (jcExecApp != null) {
+                            bailOut(ERR_NO_TWO_COMPILER_OPTIONS);
+                        }
+                        jcMainClass = argsV.get(argsSt++);
+                        break;
+                    case OPT_JCMETHOD:
+                        if (jcExecApp != null) {
+                            bailOut(ERR_NO_TWO_COMPILER_OPTIONS);
+                        }
+                        jcMethod = argsV.get(argsSt++);
+                        break;
+                    case OPT_JCEXEC:
+                        if (jcPath != null || jcMainClass != null || jcMethod != null) {
+                            bailOut(ERR_NO_TWO_COMPILER_OPTIONS);
+                        }
+                        jcExecApp = argsV.get(argsSt++);
+                        break;
+                    case OPT_TIMING:
+                        Utils.setTimingOn();
+                        break;
+                    case OPT_VERSION:
+                        // Utils.printInfoMessage("jmake version " + VERSION); // Printed anyway at present...
+                        throw new PrivateException(new PublicExceptions.NoActionRequestedException());
+                    case OPT_WARNLIMIT:
+                        try {
+                            Utils.warningLimit =
+                                    Integer.parseInt(argsV.get(argsSt++));
+                        } catch (NumberFormatException e) {
+                            Utils.ignore(e);
+                            bailOut(argsV.get(argsSt) + ERR_IS_INVALID_OPTION);
+                        }
+                        break;
+                    case OPT_FAILONDEPJAR:
+                        if (noWarnOnDependentJar) {
+                            bailOut("it is not allowed to use -nowarnondependentjar and -failondependentjar together");
+                        }
+                        failOnDependentJar = true;
+                        break;
+                    case OPT_NOWARNONDEPJAR:
+                        if (failOnDependentJar) {
+                            bailOut("it is not allowed to use -failondependentjar and -nowarnondependentjar together");
+                        }
+                        noWarnOnDependentJar = true;
+                        break;
+                    case OPT_BOOTCLASSPATH:
+                        try {
+                            setBootClassPath(argsV.get(argsSt++));
+                        } catch (PublicExceptions.InvalidCmdOptionException ex) {
+                            bailOut(ex.getMessage());
+                        }
+                        break;
+                    case OPT_EXTDIRS:
+                        try {
+                            setExtDirs(argsV.get(argsSt++));
+                        } catch (PublicExceptions.InvalidCmdOptionException ex) {
+                            bailOut(ex.getMessage());
+                        }
+                        break;
+                    case OPT_VPATH:
+                        try {
+                            setVirtualPath(argsV.get(argsSt++));
+                        } catch (PublicExceptions.InvalidCmdOptionException ex) {
+                            bailOut(ex.getMessage());
+                        }
+                        break;
+                    case OPT_PDB_TEXT_FORMAT:
+                        pdbTextFormat = true;
+                        break;
+                    case OPT_DEPENDENCY_FILE:
+                        dependencyFile = argsV.get(argsSt++);
+                        break;
+                    default:
+                        bailOut(arg + ERR_IS_INVALID_OPTION);
+                }
+            } else {    // Not an option, at least does not start with "-". Treat it as a command line file name or source name.
+                if (arg.length() > 1 && arg.charAt(0) == '@') {
+                    arg = arg.substring(1);
+                    loadCmdFile(arg, argsV);
+                } else {
+                    if (!arg.endsWith(".java")) {
+                        bailOut(arg + ERR_IS_INVALID_OPTION);
+                    }
+                    allProjectJavaFileNamesList.add(arg);
+                }
+            }
+        }
+    }
+
+    /** Load @-file that can contain anything that command line can contain. */
+    private void loadCmdFile(String name, List<String> argsV) {
+        try {
+            Reader r = new BufferedReader(new FileReader(name));
+            StreamTokenizer st = new StreamTokenizer(r);
+            st.resetSyntax();
+            st.wordChars(' ', 255);
+            st.whitespaceChars(0, ' ');
+            st.commentChar('#');
+            st.quoteChar('"');
+            st.quoteChar('\'');
+            while (st.nextToken() != StreamTokenizer.TT_EOF) {
+                argsV.add(st.sval);
+            }
+            r.close();
+        } catch (IOException e) {
+            throw new PrivateException(new PublicExceptions.CommandFileReadException(name + ":\n" + e.getMessage()));
+        }
+    }
+
+    /**
+     * Main entrypoint for applications that want to call <b>jmake</b> externally and are willing
+     * to handle exceptions that it may throw.
+     *
+     * @param  args  command line arguments passed to <b>jmake</b>.
+     *
+     * @throws PublicExceptions.NoActionRequestedException  if <b>jmake</b> was not requested to do any real work;
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid command line option was detected;
+     * @throws PublicExceptions.PDBCorruptedException       if project database is corrupted;
+     * @throws PublicExceptions.CommandFileReadException    if there was error reading a command file;
+     * @throws PublicExceptions.CompilerInteractionException if there was a problem initializing or calling the compiler,
+     *                                                       or compilation errors were detected;
+     * @throws PublicExceptions.ClassFileParseException     if there was error parsing a class file;
+     * @throws PublicExceptions.ClassNameMismatchException  if there is a mismatch between the deduced and the actual class name;
+     * @throws PublicExceptions.InvalidSourceFileExtensionException if a supplied source file has an invalid extension (not .java);
+     * @throws PublicExceptions.JarDependsOnSourceException if a class in a <code>JAR</code> is found dependent on a class with the .java source;
+     * @throws PublicExceptions.DoubleEntryException        if more than one entry for the same class is found in the project
+     * @throws FileNotFoundException                        if a <code>.java</code> or a <code>.class</code> file was not found;
+     * @throws IOException                                  if there was an I/O problem of any kind;
+     * @throws PublicExceptions.InternalException           if an internal problem that should never happen was detected.
+     */
+    public void mainProgrammatic(String args[]) throws
+            PublicExceptions.NoActionRequestedException,
+            PublicExceptions.InvalidCmdOptionException,
+            PublicExceptions.PDBCorruptedException,
+            PublicExceptions.CommandFileReadException,
+            PublicExceptions.CompilerInteractionException,
+            PublicExceptions.ClassFileParseException,
+            PublicExceptions.ClassNameMismatchException,
+            PublicExceptions.InvalidSourceFileExtensionException,
+            PublicExceptions.JarDependsOnSourceException,
+            PublicExceptions.DoubleEntryException,
+            FileNotFoundException,
+            IOException,
+            PublicExceptions.InternalException {
+        try {
+            Utils.printInfoMessage("Jmake version " + VERSION);
+            if (!controlledExecution) {
+                processCommandLine(args);
+                String[] projectJars = ClassPath.getProjectJars();
+                if (projectJars != null) {
+                    for (int i = 0; i < projectJars.length; i++) {
+                        allProjectJavaFileNamesList.add(projectJars[i]);
+                    }
+                }
+                allProjectJavaFileNames =
+                        allProjectJavaFileNamesList.toArray(new String[allProjectJavaFileNamesList.size()]);
+            } else {
+                String[] projectJars = ClassPath.getProjectJars();
+                if (projectJars != null) {
+                    String newNames[] =
+                            new String[allProjectJavaFileNames.length + projectJars.length];
+                    System.arraycopy(allProjectJavaFileNames, 0, newNames, 0, allProjectJavaFileNames.length);
+                    System.arraycopy(projectJars, 0, newNames, allProjectJavaFileNames.length, projectJars.length);
+                    allProjectJavaFileNames = newNames;
+                }
+            }
+
+            Utils.startTiming(Utils.TIMING_PDBREAD);
+            PCDContainer pcdc;
+            pcdc = PCDContainer.load(pdbFileName, pdbTextFormat);
+            Utils.stopAndPrintTiming("DB read", Utils.TIMING_PDBREAD);
+
+            pcdm = new PCDManager(pcdc, allProjectJavaFileNames,
+                addedJavaFileNames, removedJavaFileNames, updatedJavaFileNames,
+                destDir, javacAddArgs, failOnDependentJar, noWarnOnDependentJar,
+                dependencyFile);
+
+            pcdm.initializeCompiler(jcExecApp, jcPath, jcMainClass, jcMethod, externalApp, externalCompileSourceFilesMethod);
+
+            pcdm.run();
+        } catch (PrivateException e) {
+            Throwable origException = e.getOriginalException();
+            if (origException instanceof PublicExceptions.NoActionRequestedException) {
+                throw (PublicExceptions.NoActionRequestedException) origException;
+            } else if (origException instanceof PublicExceptions.InvalidCmdOptionException) {
+                throw (PublicExceptions.InvalidCmdOptionException) origException;
+            } else if (origException instanceof PublicExceptions.CommandFileReadException) {
+                throw (PublicExceptions.CommandFileReadException) origException;
+            } else if (origException instanceof PublicExceptions.PDBCorruptedException) {
+                throw (PublicExceptions.PDBCorruptedException) origException;
+            } else if (origException instanceof PublicExceptions.CompilerInteractionException) {
+                throw (PublicExceptions.CompilerInteractionException) origException;
+            } else if (origException instanceof PublicExceptions.ClassFileParseException) {
+                throw (PublicExceptions.ClassFileParseException) origException;
+            } else if (origException instanceof PublicExceptions.ClassNameMismatchException) {
+                throw (PublicExceptions.ClassNameMismatchException) origException;
+            } else if (origException instanceof PublicExceptions.InvalidSourceFileExtensionException) {
+                throw (PublicExceptions.InvalidSourceFileExtensionException) origException;
+            } else if (origException instanceof PublicExceptions.JarDependsOnSourceException) {
+                throw (PublicExceptions.JarDependsOnSourceException) origException;
+            } else if (origException instanceof PublicExceptions.DoubleEntryException) {
+                throw (PublicExceptions.DoubleEntryException) origException;
+            } else if (origException instanceof FileNotFoundException) {
+                throw (FileNotFoundException) origException;
+            } else if (origException instanceof IOException) {
+                throw (IOException) origException;
+            } else if (origException instanceof PublicExceptions.InternalException) {
+                throw (PublicExceptions.InternalException) origException;
+            }
+        } finally {
+            ClassPath.resetOnFinish();
+        }
+    }
+
+    /**
+     * Main entrypoint for applications that want to call <b>jmake</b> externally and would prefer
+     * receiving an error code instead of an exception in case something goes wrong.<p>
+     *
+     * @param  args  command line arguments passed to <b>jmake</b>.
+     *
+     * @return <dl>
+     *  <dt><code>  0</code>  if everything was successful;
+     *  <dt><code> -1</code>  invalid command line option detected;
+     *  <dt><code> -2</code>  error reading command file;
+     *  <dt><code> -3</code>  project database corrupted;
+     *  <dt><code> -4</code>  error initializing or calling the compiler;
+     *  <dt><code> -5</code>  compilation error;
+     *  <dt><code> -6</code>  error parsing a class file;
+     *  <dt><code> -7</code>  file not found;
+     *  <dt><code> -8</code>  I/O exception;
+     *  <dt><code> -9</code>  internal jmake exception;
+     *  <dt><code>-10</code>  deduced and actual class name mismatch;
+     *  <dt><code>-11</code>  invalid source file extension;
+     *  <dt><code>-12</code>  a class in a <code>JAR</code> is found dependent on a class with the .java source;
+     *  <dt><code>-13</code>  more than one entry for the same class is found in the project
+     *  <dt><code>-20</code> internal Java error (caused by <code>java.lang.InternalError</code>);
+     *  <dt><code>-30</code> internal Java error (caused by <code>java.lang.RuntimeException</code>).
+     *  </dl>
+     */
+    public int mainExternal(String args[]) {
+        try {
+            mainProgrammatic(args);
+        } catch (PublicExceptions.NoActionRequestedException e0) {
+            // Nothing to do
+        } catch (PublicExceptions.InvalidCmdOptionException e1) {
+            Utils.printErrorMessage(e1.getMessage());
+            return -1;
+        } catch (PublicExceptions.CommandFileReadException e2) {
+            Utils.printErrorMessage("error parsing command file:");
+            Utils.printErrorMessage(e2.getMessage());
+            return -2;
+        } catch (PublicExceptions.PDBCorruptedException e3) {
+            Utils.printErrorMessage("project database corrupted: " + e3.getMessage());
+            return -3;
+        } catch (PublicExceptions.CompilerInteractionException e4) {
+            if (e4.getOriginalException() != null) {
+                Utils.printErrorMessage("error interacting with the compiler: ");
+                Utils.printErrorMessage(e4.getMessage());
+                Utils.printErrorMessage("original exception:");
+                Utils.printErrorMessage(e4.getOriginalException().getMessage());
+                return -4;
+            } else { // Otherwise there is a compilation error, and the compiler has already printed a lot...
+                return -5;
+            }
+        } catch (PublicExceptions.ClassFileParseException e6) {
+            Utils.printErrorMessage(e6.getMessage());
+            return -6;
+        } catch (FileNotFoundException e7) {
+            Utils.printErrorMessage(e7.getMessage());
+            return -7;
+        } catch (IOException e8) {
+            Utils.printErrorMessage(e8.getMessage());
+            return -8;
+        } catch (PublicExceptions.InternalException e9) {
+            Utils.printErrorMessage("internal jmake exception detected:");
+            Utils.printErrorMessage(e9.getMessage());
+            Utils.printErrorMessage(Utils.REPORT_PROBLEM);
+            Utils.printErrorMessage("the stack trace is as follows:");
+            e9.printStackTrace();
+            return -9;
+        } catch (PublicExceptions.ClassNameMismatchException e10) {
+            Utils.printErrorMessage(e10.getMessage());
+            return -10;
+        } catch (PublicExceptions.InvalidSourceFileExtensionException e11) {
+            Utils.printErrorMessage(e11.getMessage());
+            return -11;
+        } catch (PublicExceptions.JarDependsOnSourceException e12) {
+            Utils.printErrorMessage(e12.getMessage());
+            return -12;
+        } catch (PublicExceptions.DoubleEntryException e13) {
+            Utils.printErrorMessage(e13.getMessage());
+            return -13;
+        } catch (InternalError e20) {
+            Utils.printErrorMessage("internal Java error: " + e20);
+            Utils.printErrorMessage("Consult the following stack trace for more info:");
+            e20.printStackTrace();
+            return -20;
+        } catch (RuntimeException e30) {
+            Utils.printErrorMessage("internal Java exception: " + e30);
+            Utils.printErrorMessage("Consult the following stack trace for more info:");
+            e30.printStackTrace();
+            return -30;
+        }
+
+        return 0;
+    }
+
+    /**
+     * Main entrypoint for applications such as Ant, that want to have full control over
+     * compilations that <b>jmake</b> invokes, and are willing to handle exceptions
+     * that it may throw.
+     *
+     * @param javaFileNames    array of strings that specify <code>.java</code> file names.
+     * @param destDirName      name of the destination directory (<b>jmake</b> will look up binary classes
+     *                         in there, it should be the same as the one used by the Java compiler method).
+     *                         If <code>null</code> is passed, classes will be looked up in the same directories
+     *                         as their sources, in agreement with the default Java compiler behaviour.
+     * @param pdbFileName      project database file name (if <code>null</code> is passed,
+     *                         a file with the default name placed in the current directory will be used).
+     * @param externalApp      an object on which to invoke <code>externalCompileSourceFilesMethod</code> method.
+     * @param externalCompileSourceFilesMethod    a method of the form <code>int x(String[] args)</code>. It
+     *                         should return <code>0</code> if compilation is successful and any non-zero value
+     *                         otherwise. <b>jmake</b> passes it a list of the <code>.java</code> files to
+     *                         recompile in the form of canonical full path file names.
+     *
+     * @throws PublicExceptions.NoActionRequestedException  if <b>jmake</b> was not requested to do any real work;
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid command line option was detected;
+     * @throws PublicExceptions.PDBCorruptedException       if project database is corrupted;
+     * @throws PublicExceptions.CommandFileReadException    if there was error reading a command file;
+     * @throws PublicExceptions.CompilerInteractionException if there was a problem initializing or calling the compiler,
+     *                                                       or compilation errors were detected;
+     * @throws PublicExceptions.ClassFileParseException     if there was error parsing a class file;
+     * @throws PublicExceptions.ClassNameMismatchException  if there is a mismatch between the deduced and the actual class name;
+     * @throws PublicExceptions.InvalidSourceFileExtensionException if a specified source file has an invalid extension (not .java);
+     * @throws PublicExceptions.JarDependsOnSourceException if a class in a <code>JAR</code> is found dependent on a class with the .java source;
+     * @throws PublicExceptions.DoubleEntryException        if more than one entry for the same class is found in the project
+     * @throws PublicExceptions.InternalException           if an internal problem that should never happen was detected.
+     * @throws FileNotFoundException                        if a <code>.java</code> or a <code>.class</code> file was not found;
+     * @throws IOException                                  if there was an I/O problem of any kind;
+     */
+    public void mainProgrammaticControlled(String javaFileNames[], String destDirName, String pdbFileName,
+            Object externalApp, Method externalCompileSourceFilesMethod) throws
+            PublicExceptions.NoActionRequestedException,
+            PublicExceptions.InvalidCmdOptionException,
+            PublicExceptions.PDBCorruptedException,
+            PublicExceptions.CommandFileReadException,
+            PublicExceptions.CompilerInteractionException,
+            PublicExceptions.ClassFileParseException,
+            PublicExceptions.ClassNameMismatchException,
+            PublicExceptions.InvalidSourceFileExtensionException,
+            PublicExceptions.JarDependsOnSourceException,
+            PublicExceptions.DoubleEntryException,
+            PublicExceptions.InternalException,
+            FileNotFoundException,
+            IOException {
+
+        controlledExecution = true;
+        this.pdbFileName = pdbFileName;
+        this.destDir = destDirName;
+        this.allProjectJavaFileNames = javaFileNames;
+        this.externalApp = externalApp;
+        this.externalCompileSourceFilesMethod = externalCompileSourceFilesMethod;
+
+        mainProgrammatic(null);
+    }
+
+    /**
+     * Main entrypoint for applications such as Ant, that want to have full control over
+     * compilations that <b>jmake</b> invokes, and do not want to handle exceptions that it
+     * may throw. Error codes returned are the same as <code>mainExternal(String[])</code> returns.
+     *
+     * @param javaFileNames    array of strings that specify <code>.java</code> file names.
+     * @param destDirName      name of the destination directory (<b>jmake</b> will look up binary classes
+     *                         in there, it should be the same as the one used by the Java compiler method).
+     *                         If <code>null</code> is passed, classes will be looked up in the same directories
+     *                         as their sources, in agreement with the default Java compiler behaviour.
+     * @param pdbFileName      project database file name (if <code>null</code> is passed,
+     *                         a file with the default name placed in the current directory will be used).
+     * @param externalApp      an object on which to invoke <code>externalCompileSourceFilesMethod</code> method.
+     * @param externalCompileSourceFilesMethod    a method of the form <code>int x(String[] args)</code>. It
+     *                         should return <code>0</code> if compilation is successful and any non-zero value
+     *                         otherwise. <b>jmake</b> passes it a list of the <code>.java</code> files to
+     *                         recompile in the form of canonical full path file names.
+     *
+     * @see #mainExternal(String[])
+     */
+    public int mainExternalControlled(String javaFileNames[], String destDirName, String pdbFileName,
+            Object externalApp, Method externalCompileSourceFilesMethod) {
+        controlledExecution = true;
+        this.pdbFileName = pdbFileName;
+        this.destDir = destDirName;
+        this.allProjectJavaFileNames = javaFileNames;
+        this.externalApp = externalApp;
+        this.externalCompileSourceFilesMethod = externalCompileSourceFilesMethod;
+
+        return mainExternal(null);
+    }
+
+    /**
+     * Main entrypoint for applications such as IDEs, that themselves keep track of updated/added/removed sources,
+     * want to have full control over compilations that <b>jmake</b> invokes, and are willing to handle exceptions
+     * that it may throw.
+     *
+     * @param addedJavaFileNames   names of <code>.java</code> files just added to the project
+     * @param removedJavaFileNames names of <code>.java</code> files just removed from the project
+     * @param updatedJavaFileNames names of updated project <code>.java</code> files
+     * @param destDirName      name of the destination directory (<b>jmake</b> will look up binary classes
+     *                         in there, it should be the same as the one used by the Java compiler method).
+     *                         If <code>null</code> is passed, classes will be looked up in the same directories
+     *                         as their sources, in agreement with the default Java compiler behaviour.
+     * @param pdbFileName      project database file name (if <code>null</code> is passed,
+     *                         a file with the default name placed in the current directory will be used).
+     * @param externalApp      an object on which to invoke <code>externalCompileSourceFilesMethod</code> method.
+     * @param externalCompileSourceFilesMethod    a method of the form <code>int x(String[] args)</code>. It
+     *                         should return <code>0</code> if compilation is successful and any non-zero value
+     *                         otherwise. <b>jmake</b> passes it a list of the <code>.java</code> files to
+     *                         recompile in the form of canonical full path file names.
+     *
+     * @throws PublicExceptions.NoActionRequestedException  if <b>jmake</b> was not requested to do any real work;
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid command line option was detected;
+     * @throws PublicExceptions.PDBCorruptedException       if project database is corrupted;
+     * @throws PublicExceptions.CommandFileReadException    if there was error reading a command file;
+     * @throws PublicExceptions.CompilerInteractionException if there was a problem initializing or calling the compiler,
+     *                                                       or compilation errors were detected;
+     * @throws PublicExceptions.ClassFileParseException     if there was error parsing a class file;
+     * @throws PublicExceptions.ClassNameMismatchException  if there is a mismatch between the deduced and the actual class name;
+     * @throws PublicExceptions.InvalidSourceFileExtensionException if a specified source file has an invalid extension (not .java);
+     * @throws PublicExceptions.JarDependsOnSourceException if a class in a <code>JAR</code> is found dependent on a class with the .java source;
+     * @throws PublicExceptions.DoubleEntryException        if more than one entry for the same class is found in the project
+     * @throws PublicExceptions.InternalException           if an internal problem that should never happen was detected.
+     * @throws FileNotFoundException                        if a <code>.java</code> or a <code>.class</code> file was not found;
+     * @throws IOException                                  if there was an I/O problem of any kind;
+     */
+    public void mainProgrammaticControlled(String addedJavaFileNames[], String removedJavaFileNames[], String updatedJavaFileNames[],
+            String destDirName, String pdbFileName,
+            Object externalApp, Method externalCompileSourceFilesMethod) throws
+            PublicExceptions.NoActionRequestedException,
+            PublicExceptions.InvalidCmdOptionException,
+            PublicExceptions.PDBCorruptedException,
+            PublicExceptions.CommandFileReadException,
+            PublicExceptions.CompilerInteractionException,
+            PublicExceptions.ClassFileParseException,
+            PublicExceptions.ClassNameMismatchException,
+            PublicExceptions.InvalidSourceFileExtensionException,
+            PublicExceptions.JarDependsOnSourceException,
+            PublicExceptions.DoubleEntryException,
+            PublicExceptions.InternalException,
+            FileNotFoundException,
+            IOException {
+
+        controlledExecution = true;
+        this.pdbFileName = pdbFileName;
+        this.destDir = destDirName;
+        this.addedJavaFileNames = addedJavaFileNames;
+        this.removedJavaFileNames = removedJavaFileNames;
+        this.updatedJavaFileNames = updatedJavaFileNames;
+        this.externalApp = externalApp;
+        this.externalCompileSourceFilesMethod = externalCompileSourceFilesMethod;
+
+        mainProgrammatic(null);
+    }
+
+    /**
+     * Main entrypoint for applications such as IDEs, that themselves keep track of updated/added/removed sources,
+     * want to have full control over compilations that <b>jmake</b> invokes, and do not want to handle exceptions
+     * that it may throw. Error codes returned are the same as <code>mainExternal(String[])</code> returns.
+     *
+     * @param addedJavaFileNames   names of <code>.java</code> files just added to the project
+     * @param removedJavaFileNames names of <code>.java</code> files just removed from the project
+     * @param updatedJavaFileNames names of updated project <code>.java</code> files
+     * @param destDirName      name of the destination directory (<b>jmake</b> will look up binary classes
+     *                         in there, it should be the same as the one used by the Java compiler method).
+     *                         If <code>null</code> is passed, classes will be looked up in the same directories
+     *                         as their sources, in agreement with the default Java compiler behaviour.
+     * @param pdbFileName      project database file name (if <code>null</code> is passed,
+     *                         a file with the default name placed in the current directory will be used).
+     * @param externalApp      an object on which to invoke <code>externalCompileSourceFilesMethod</code> method.
+     * @param externalCompileSourceFilesMethod    a method of the form <code>int x(String[] args)</code>. It
+     *                         should return <code>0</code> if compilation is successful and any non-zero value
+     *                         otherwise. <b>jmake</b> passes it a list of the <code>.java</code> files to
+     *                         recompile in the form of canonical full path file names.
+     *
+     * @see #mainExternal(String[])
+     */
+    public int mainExternalControlled(String addedJavaFileNames[], String removedJavaFileNames[], String updatedJavaFileNames[],
+            String destDirName, String pdbFileName,
+            Object externalApp, Method externalCompileSourceFilesMethod) {
+        controlledExecution = true;
+        this.pdbFileName = pdbFileName;
+        this.destDir = destDirName;
+        this.addedJavaFileNames = addedJavaFileNames;
+        this.removedJavaFileNames = removedJavaFileNames;
+        this.updatedJavaFileNames = updatedJavaFileNames;
+        this.externalApp = externalApp;
+        this.externalCompileSourceFilesMethod = externalCompileSourceFilesMethod;
+
+        return mainExternal(null);
+    }
+
+    /**
+     * Main entrypoint for the standalone <b>jmake</b> application. This method calls does little but calling
+     * <code>mainExternal</code>, and its execution always completes with <code>System.exit(code)</code>,
+     * where <code>code</code> is the value returned by <code>mainExternal</code>.
+     *
+     * @see #mainExternal(String[])
+     * @see #mainProgrammatic(String[])
+     *
+     * @param  args  command line arguments passed to <b>jmake</b>
+     */
+    public static void main(String args[]) {
+        Utils.startTiming(Utils.TIMING_TOTAL);
+
+        Main m = new Main();
+        int exitCode = m.mainExternal(args);
+
+        Utils.stopAndPrintTiming("Total", Utils.TIMING_TOTAL);
+        if ( exitCode != 0 ) {
+            System.exit(exitCode);
+        }
+    }
+
+    /**
+     * Customize the output of <b>jmake</b>.
+     *
+     * @see #setOutputStreams(PrintStream, PrintStream, PrintStream)
+     *
+     * @param printInfoMessages    specify whether to print information messages
+     * @param printWarningMessages specify whether to print warning messages
+     * @param printErrorMessages   specify whether to print error messages
+     */
+    public static void customizeOutput(boolean printInfoMessages,
+            boolean printWarningMessages,
+            boolean printErrorMessages) {
+        Utils.customizeOutput(printInfoMessages, printWarningMessages, printErrorMessages);
+    }
+
+    /**
+     * Set the class path to be used by the compiler, and also by the dependency checker for the purposes of
+     * superclass/superinterface change tracking. For the compiler, this class path will be merged with the
+     * project class path (set via setProjectClassPath(String)). Other than that, its value will be used only to
+     * look up superclasses/superinterfaces of project classes. Note that non-project superclasses and
+     * superinterfaces are first looked up at the boot class path, then on the extension class path, and then
+     * on this class path.
+     *
+     * @see #setProjectClassPath(String)
+     * @see #setBootClassPath(String)
+     * @see #setExtDirs(String)
+     *
+     * @param classPath  the value of the class path, in the usual format (i.e. entries that are directories
+     *                   or JARs, separated by colon or semicolon depending on the platform).
+     *
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid class path value is specified.
+     */
+    public static void setClassPath(String classPath) throws PublicExceptions.InvalidCmdOptionException {
+        ClassPath.setClassPath(classPath);
+    }
+
+    /**
+     * Set the class path to be used by the compiler, and also by the dependency checker for the purposes of
+     * superclass/superinterface change tracking and sourceless class dependency checking. For the compiler,
+     * and also in order to look up superclasses/superinterfaces of project classes, this class path will be
+     * merged with the standard class path (set via setClassPath(String)). But in addition, all binary classes
+     * that are on this class path are stored in the project database and checked for updates every time jmake
+     * is invoked. Any changes to these classes trigger the standard dependency checking procedure. However,
+     * dependent classes are looked up only among the "normal" project classes, i.e. those that have sources.
+     * Therefore sourceless classes are assumed to always be mutually consistent.
+     *
+     * Currently only JAR files can be present on this class path.
+     *
+     * @see #setClassPath(String)
+     *
+     * @param projectClassPath  the value of the class path, in the usual format (i.e. entries that are directories
+     *                          or JARs, separated by colon or semicolon depending on the platform).
+     *
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid class path value is specified.
+     */
+    public static void setProjectClassPath(String projectClassPath) throws PublicExceptions.InvalidCmdOptionException {
+        ClassPath.setProjectClassPath(projectClassPath);
+    }
+
+    /**
+     * Set the boot class path to be used by the compiler (-bootclasspath option) and also by the dependency
+     * checker (by default, the value of "sun.boot.class.path" property is used).
+     *
+     * @see #setClassPath(String)
+     *
+     * @param classPath   the value of the boot class path, in the usual format (i.e. entries that are directories
+     *                   or JARs, separated by colon or semicolon depending on the platform).
+     *
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid class path value is specified.
+     */
+    public static void setBootClassPath(String classPath) throws PublicExceptions.InvalidCmdOptionException {
+        ClassPath.setBootClassPath(classPath);
+    }
+
+    /**
+     * Set the extensions location to be used by the compiler (-extdirs option) and also by the dependency
+     * checker (by default, the value of "java.ext.dirs" property is used).
+     *
+     * @see #setClassPath(String)
+     *
+     * @param dirs   the value of extension directories, in the usual format (one or more directory names
+     *               separated by colon or semicolon depending on the platform).
+     *
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid class path value is specified.
+     */
+    public static void setExtDirs(String dirs) throws PublicExceptions.InvalidCmdOptionException {
+        ClassPath.setExtDirs(dirs);
+    }
+
+    /**
+     * Set the virtual path used to find both source and class files that are part of the project
+     * but are not in the local directory.
+     *
+     * @see #setClassPath(String)
+     *
+     * @param dirs   the value of extension directories, in the usual format (one or more directory names
+     *               separated by colon or semicolon depending on the platform).
+     *
+     * @throws PublicExceptions.InvalidCmdOptionException   if invalid path value is specified.
+     */
+    public static void setVirtualPath(String dirs) throws PublicExceptions.InvalidCmdOptionException {
+        ClassPath.setVirtualPath(dirs);
+    }
+
+    /** Produce no warning or error message upon a dependent <code>JAR</code> detection. */
+    public static final int DEPJAR_NOWARNORERROR = 0;
+    /** Produce a warning upon a dependent <code>JAR</code> detection. */
+    public static final int DEPJAR_WARNING = 1;
+    /** Produce an error message (throw an exception) upon a dependent <code>JAR</code> detection. */
+    public static final int DEPJAR_ERROR = 2;
+
+    /**
+     * Set the response of <b>jmake</b> in case a dependence of a class located in a <code>JAR</code> file on a
+     * class with a <code>.java</code> source is detected (such dependencies are highly discouraged, since it is not
+     * possible to recompile a class in the <code>JAR</code> that has no source).
+     *
+     * @param code  response type: DEPJAR_NOWARNORERROR, DEPJAR_WARNING (default behaviour) or DEPJAR_ERROR.
+     */
+    public void setResponseOnDependentJar(int code) {
+        switch (code) {
+            case DEPJAR_NOWARNORERROR:
+                noWarnOnDependentJar = true;
+                failOnDependentJar = false;
+                break;
+            case DEPJAR_WARNING:
+                noWarnOnDependentJar = false;
+                failOnDependentJar = false;
+                break;
+            case DEPJAR_ERROR:
+                noWarnOnDependentJar = false;
+                failOnDependentJar = true;
+                break;
+        }
+    }
+
+    /**
+     * Return the names of all classes that <b>jmake</b>, on this invocation, found updated - either because
+     * <b>jmake</b> itself recompiled them or because they were updated independently (their timestamp/checksum
+     * found different from those contained in the project database).
+     */
+    public String[] getUpdatedClasses() {
+        return pcdm.getAllUpdatedClassesAsStringArray();
+    }
+
+    /**
+     * Set the output print streams to be used by <b>jmake</b>.
+     *
+     * @see #customizeOutput(boolean, boolean, boolean)
+     *
+     * @param out   print stream to be used for information ("logging") messages that <b>jmake</b> emits
+     * @param warn  print stream to be used for warning messages
+     * @param err   print stream to be used for error messages
+     */
+    public static void setOutputStreams(PrintStream out, PrintStream warn, PrintStream err) {
+        Utils.setOutputStreams(out, warn, err);
+    }
+
+    /** Get the version of this copy of <b>jmake</b> */
+    public static String getVersion() {
+        return VERSION;
+    }
+    private static final String ERR_IS_INVALID_OPTION =
+            " is an invalid option or argument.";
+    private static final String ERR_NO_TWO_COMPILER_OPTIONS =
+            "You may not specify both compiler class and compiler executable application";
+    private static final String ERR_SHOULD_BE_EXPLICIT =
+            " compiler option should be specified directly as a jmake option";
+
+    private static void bailOut(String s) {
+        throw new PrivateException(new PublicExceptions.InvalidCmdOptionException("jmake: " + s + "\nRun \"jmake -h\" for help."));
+    }
+
+    private static void optRequiresArg(String s) {
+        bailOut("the " + s + " option requires an argument.");
+    }
+
+    private static void printUsage() {
+        Utils.printInfoMessage("Usage: jmake <options> <.java files> <@files>");
+        Utils.printInfoMessage("where possible options include:");
+        Utils.printInfoMessage("  -h, -help             print this help message");
+        Utils.printInfoMessage("  -version              print the product version number");
+        Utils.printInfoMessage("  -pdb <file name>      specify non-default project database file");
+        Utils.printInfoMessage("  -pdb-text-format      if specified, pdb file is stored in text format");
+        Utils.printInfoMessage("  -d <directory>        specify where to place generated class files");
+        Utils.printInfoMessage("  -classpath <path>     specify where to find user class files");
+        Utils.printInfoMessage("  -projclasspath <path> specify where to find sourceless project classes");
+        Utils.printInfoMessage("                        (currently only JARs are allowed on this path)");
+        Utils.printInfoMessage("  -C<option>            specify an option to be passed to the Java compiler");
+        Utils.printInfoMessage("                        (this option's arguments should also be preceded by -C)");
+        Utils.printInfoMessage("  -jcpath <path>        specify the class path for a non-default Java compiler");
+        Utils.printInfoMessage("                        (default is <JAVAHOME>/lib/tools.jar)");
+        Utils.printInfoMessage("  -jcmainclass <class>  specify the main class for a non-default Java compiler");
+        Utils.printInfoMessage("                        (default is com.sun.tools.javac.Main)");
+        Utils.printInfoMessage("  -jcmethod <method>    specify the method to call in the Java compiler class");
+        Utils.printInfoMessage("                        (default is \"compile(String args[])\")");
+        Utils.printInfoMessage("  -jcexec <file name>   specify a binary non-default Java compiler application");
+        Utils.printInfoMessage("  -failondependentjar   fail if a class on projectclasspath depends on a class");
+        Utils.printInfoMessage("                        with .java source (by default, a warning is issued)");
+        Utils.printInfoMessage("  -nowarnondependentjar no warning or error if a class on projectclasspath");
+        Utils.printInfoMessage("                        depends on a class with a .java source (use with care)");
+        Utils.printInfoMessage("  -warnlimit <number>   specify the maximum number of warnings (20 by default)");
+        Utils.printInfoMessage("  -bootclasspath <path> override location of bootstrap class files");
+        Utils.printInfoMessage("  -extdirs <dirs>       override location of installed extensions");
+        Utils.printInfoMessage("  -vpath <dirs>         a list of directories to search for Java and class files similar to GNUMake's VPATH");
+        Utils.printInfoMessage("  -depfile <path>       a file generated by the compiler containing additional java->class mappings");
+        Utils.printInfoMessage("");
+        Utils.printInfoMessage("Examples:");
+        Utils.printInfoMessage("  jmake -d classes -classpath .;mylib.jar X.java Y.java Z.java");
+        Utils.printInfoMessage("  jmake -pdb myproject.pdb -jcexec c:\\java\\jikes\\jikes.exe @myproject.src");
+    }
+}