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Don't need main in new architecture. 

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270176 13f79535-47bb-0310-9956-ffa450edef68
master
Peter Donald 24 years ago
parent
1dc954f3a5
commit
6bdc3432d5
2 changed files with 0 additions and 1686 deletions
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  1. +0
    -843
      proposal/myrmidon/src/main/org/apache/tools/ant/Main.java
  2. +0
    -843
      proposal/myrmidon/src/todo/org/apache/tools/ant/Main.java

+ 0
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proposal/myrmidon/src/main/org/apache/tools/ant/Main.java View File

@@ -1,843 +0,0 @@
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE file.
*/
package org.apache.tools.ant;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Enumeration;
import java.util.Properties;
import java.util.Vector;
import org.apache.myrmidon.api.TaskException;

/**
* Command line entry point into Ant. This class is entered via the cannonical
* `public static void main` entry point and reads the command line arguments.
* It then assembles and executes an Ant project. <p>
*
* If you integrating Ant into some other tool, this is not the class to use as
* an entry point. Please see the source code of this class to see how it
* manipulates the Ant project classes.
*
* @author duncan@x180.com
*/
public class Main
{

/**
* The default build file name
*/
public final static String DEFAULT_BUILD_FILENAME = "build.xml";

private static String antVersion = null;

/**
* Our current message output status. Follows Project.MSG_XXX
*/
private int msgOutputLevel = Project.MSG_INFO;
/**
* null
*/

/**
* Stream that we are using for logging
*/
private PrintStream out = System.out;

/**
* Stream that we are using for logging error messages
*/
private PrintStream err = System.err;

/**
* The build targets
*/
private Vector targets = new Vector( 5 );

/**
* Set of properties that can be used by tasks
*/
private Properties definedProps = new Properties();

/**
* Names of classes to add as listeners to project
*/
private Vector listeners = new Vector( 5 );

/**
* The Ant logger class. There may be only one logger. It will have the
* right to use the 'out' PrintStream. The class must implements the
* BuildLogger interface
*/
private String loggerClassname = null;

/**
* Indicates whether output to the log is to be unadorned.
*/
private boolean emacsMode = false;

/**
* Indicates if this ant should be run.
*/
private boolean readyToRun = false;

/**
* Indicates we should only parse and display the project help information
*/
private boolean projectHelp = false;

/**
* File that we are using for configuration
*/
private File buildFile;

protected Main( String[] args )
throws TaskException
{

String searchForThis = null;

// cycle through given args

for( int i = 0; i < args.length; i++ )
{
String arg = args[ i ];

if( arg.equals( "-help" ) )
{
printUsage();
return;
}
else if( arg.equals( "-version" ) )
{
printVersion();
return;
}
else if( arg.equals( "-quiet" ) || arg.equals( "-q" ) )
{
msgOutputLevel = Project.MSG_WARN;
}
else if( arg.equals( "-verbose" ) || arg.equals( "-v" ) )
{
printVersion();
msgOutputLevel = Project.MSG_VERBOSE;
}
else if( arg.equals( "-debug" ) )
{
printVersion();
msgOutputLevel = Project.MSG_DEBUG;
}
else if( arg.equals( "-logfile" ) || arg.equals( "-l" ) )
{
try
{
File logFile = new File( args[ i + 1 ] );
i++;
out = new PrintStream( new FileOutputStream( logFile ) );
err = out;
System.setOut( out );
System.setErr( out );
}
catch( IOException ioe )
{
String msg = "Cannot write on the specified log file. " +
"Make sure the path exists and you have write permissions.";
System.out.println( msg );
return;
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
String msg = "You must specify a log file when " +
"using the -log argument";
System.out.println( msg );
return;
}
}
else if( arg.equals( "-buildfile" ) || arg.equals( "-file" ) || arg.equals( "-f" ) )
{
try
{
buildFile = new File( args[ i + 1 ] );
i++;
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
String msg = "You must specify a buildfile when " +
"using the -buildfile argument";
System.out.println( msg );
return;
}
}
else if( arg.equals( "-listener" ) )
{
try
{
listeners.addElement( args[ i + 1 ] );
i++;
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
String msg = "You must specify a classname when " +
"using the -listener argument";
System.out.println( msg );
return;
}
}
else if( arg.startsWith( "-D" ) )
{

/*
* Interestingly enough, we get to here when a user
* uses -Dname=value. However, in some cases, the JDK
* goes ahead * and parses this out to args
* {"-Dname", "value"}
* so instead of parsing on "=", we just make the "-D"
* characters go away and skip one argument forward.
*
* I don't know how to predict when the JDK is going
* to help or not, so we simply look for the equals sign.
*/
String name = arg.substring( 2, arg.length() );
String value = null;
int posEq = name.indexOf( "=" );
if( posEq > 0 )
{
value = name.substring( posEq + 1 );
name = name.substring( 0, posEq );
}
else if( i < args.length - 1 )
value = args[ ++i ];

definedProps.put( name, value );
}
else if( arg.equals( "-logger" ) )
{
if( loggerClassname != null )
{
System.out.println( "Only one logger class may be specified." );
return;
}
try
{
loggerClassname = args[ ++i ];
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
System.out.println( "You must specify a classname when " +
"using the -logger argument" );
return;
}
}
else if( arg.equals( "-emacs" ) )
{
emacsMode = true;
}
else if( arg.equals( "-projecthelp" ) )
{
// set the flag to display the targets and quit
projectHelp = true;
}
else if( arg.equals( "-find" ) )
{
// eat up next arg if present, default to build.xml
if( i < args.length - 1 )
{
searchForThis = args[ ++i ];
}
else
{
searchForThis = DEFAULT_BUILD_FILENAME;
}
}
else if( arg.startsWith( "-" ) )
{
// we don't have any more args to recognize!
String msg = "Unknown argument: " + arg;
System.out.println( msg );
printUsage();
return;
}
else
{
// if it's no other arg, it may be the target
targets.addElement( arg );
}

}

// if buildFile was not specified on the command line,
if( buildFile == null )
{
// but -find then search for it
if( searchForThis != null )
{
buildFile = findBuildFile( System.getProperty( "user.dir" ),
searchForThis );
}
else
{
buildFile = new File( DEFAULT_BUILD_FILENAME );
}
}

// make sure buildfile exists
if( !buildFile.exists() )
{
System.out.println( "Buildfile: " + buildFile + " does not exist!" );
throw new TaskException( "Build failed" );
}

// make sure it's not a directory (this falls into the ultra
// paranoid lets check everything catagory

if( buildFile.isDirectory() )
{
System.out.println( "What? Buildfile: " + buildFile + " is a dir!" );
throw new TaskException( "Build failed" );
}

readyToRun = true;
}

public static synchronized String getAntVersion()
throws TaskException
{
if( antVersion == null )
{
try
{
Properties props = new Properties();
InputStream in =
Main.class.getResourceAsStream( "/org/apache/tools/ant/version.txt" );
props.load( in );
in.close();

String lSep = System.getProperty( "line.separator" );
StringBuffer msg = new StringBuffer();
msg.append( "Apache Ant version " );
msg.append( props.getProperty( "VERSION" ) );
msg.append( " compiled on " );
msg.append( props.getProperty( "DATE" ) );
antVersion = msg.toString();
}
catch( IOException ioe )
{
throw new TaskException( "Could not load the version information:"
+ ioe.getMessage() );
}
catch( NullPointerException npe )
{
throw new TaskException( "Could not load the version information." );
}
}
return antVersion;
}

/**
* Command line entry point. This method kicks off the building of a project
* object and executes a build using either a given target or the default
* target.
*
* @param args Command line args.
*/
public static void main( String[] args )
{
start( args, null, null );
}

/**
* Entry point method.
*
* @param args Description of Parameter
* @param additionalUserProperties Description of Parameter
* @param coreLoader Description of Parameter
*/
public static void start( String[] args, Properties additionalUserProperties,
ClassLoader coreLoader )
{
Main m = null;

try
{
m = new Main( args );
}
catch( Throwable exc )
{
printMessage( exc );
System.exit( 1 );
}

if( additionalUserProperties != null )
{
for( Enumeration e = additionalUserProperties.keys(); e.hasMoreElements(); )
{
String key = (String)e.nextElement();
String property = additionalUserProperties.getProperty( key );
m.definedProps.put( key, property );
}
}

try
{
m.runBuild( coreLoader );
System.exit( 0 );
}
catch( TaskException be )
{
if( m.err != System.err )
{
printMessage( be );
}
System.exit( 1 );
}
catch( Throwable exc )
{
exc.printStackTrace();
printMessage( exc );
System.exit( 1 );
}
}

/**
* Search for the insert position to keep names a sorted list of Strings
*
* @param names Description of Parameter
* @param name Description of Parameter
* @return Description of the Returned Value
*/
private static int findTargetPosition( Vector names, String name )
{
int res = names.size();
for( int i = 0; i < names.size() && res == names.size(); i++ )
{
if( name.compareTo( (String)names.elementAt( i ) ) < 0 )
{
res = i;
}
}
return res;
}

/**
* Print the project description, if any
*
* @param project Description of Parameter
*/
private static void printDescription( Project project )
{
if( project.getDescription() != null )
{
System.out.println( project.getDescription() );
}
}

/**
* Prints the message of the Throwable if it's not null.
*
* @param t Description of Parameter
*/
private static void printMessage( Throwable t )
{
String message = t.getMessage();
if( message != null )
{
System.err.println( message );
}
}

/**
* Print out a list of all targets in the current buildfile
*
* @param project Description of Parameter
* @param printSubTargets Description of Parameter
*/
private static void printTargets( Project project, boolean printSubTargets )
{
// find the target with the longest name
int maxLength = 0;
Enumeration ptargets = project.getTargets().elements();
String targetName;
String targetDescription;
Target currentTarget;
// split the targets in top-level and sub-targets depending
// on the presence of a description
Vector topNames = new Vector();
Vector topDescriptions = new Vector();
Vector subNames = new Vector();

while( ptargets.hasMoreElements() )
{
currentTarget = (Target)ptargets.nextElement();
targetName = currentTarget.getName();
targetDescription = currentTarget.getDescription();
// maintain a sorted list of targets
if( targetDescription == null )
{
int pos = findTargetPosition( subNames, targetName );
subNames.insertElementAt( targetName, pos );
}
else
{
int pos = findTargetPosition( topNames, targetName );
topNames.insertElementAt( targetName, pos );
topDescriptions.insertElementAt( targetDescription, pos );
if( targetName.length() > maxLength )
{
maxLength = targetName.length();
}
}
}

printTargets( topNames, topDescriptions, "Main targets:", maxLength );

if( printSubTargets )
{
printTargets( subNames, null, "Subtargets:", 0 );
}

String defaultTarget = project.getDefaultTarget();
if( defaultTarget != null && !"".equals( defaultTarget ) )
{// shouldn't need to check but...
System.out.println( "Default target: " + defaultTarget );
}
}

/**
* Output a formatted list of target names with an optional description
*
* @param names Description of Parameter
* @param descriptions Description of Parameter
* @param heading Description of Parameter
* @param maxlen Description of Parameter
*/
private static void printTargets( Vector names, Vector descriptions, String heading, int maxlen )
{
// now, start printing the targets and their descriptions
String lSep = System.getProperty( "line.separator" );
// got a bit annoyed that I couldn't find a pad function
String spaces = " ";
while( spaces.length() < maxlen )
{
spaces += spaces;
}
StringBuffer msg = new StringBuffer();
msg.append( heading + lSep + lSep );
for( int i = 0; i < names.size(); i++ )
{
msg.append( " " );
msg.append( names.elementAt( i ) );
if( descriptions != null )
{
msg.append( spaces.substring( 0, maxlen - ( (String)names.elementAt( i ) ).length() + 2 ) );
msg.append( descriptions.elementAt( i ) );
}
msg.append( lSep );
}
System.out.println( msg.toString() );
}

/**
* Prints the usage of how to use this class to System.out
*/
private static void printUsage()
{
String lSep = System.getProperty( "line.separator" );
StringBuffer msg = new StringBuffer();
msg.append( "ant [options] [target [target2 [target3] ...]]" + lSep );
msg.append( "Options: " + lSep );
msg.append( " -help print this message" + lSep );
msg.append( " -projecthelp print project help information" + lSep );
msg.append( " -version print the version information and exit" + lSep );
msg.append( " -quiet be extra quiet" + lSep );
msg.append( " -verbose be extra verbose" + lSep );
msg.append( " -debug print debugging information" + lSep );
msg.append( " -emacs produce logging information without adornments" + lSep );
msg.append( " -logfile <file> use given file for log" + lSep );
msg.append( " -logger <classname> the class which is to perform logging" + lSep );
msg.append( " -listener <classname> add an instance of class as a project listener" + lSep );
msg.append( " -buildfile <file> use given buildfile" + lSep );
msg.append( " -D<property>=<value> use value for given property" + lSep );
msg.append( " -find <file> search for buildfile towards the root of the" + lSep );
msg.append( " filesystem and use it" + lSep );
System.out.println( msg.toString() );
}

private static void printVersion()
throws TaskException
{
System.out.println( getAntVersion() );
}

protected void addBuildListeners( Project project )
throws TaskException
{
// Add the default listener
project.addBuildListener( createLogger() );

for( int i = 0; i < listeners.size(); i++ )
{
String className = (String)listeners.elementAt( i );
try
{
BuildListener listener =
(BuildListener)Class.forName( className ).newInstance();
project.addBuildListener( listener );
}
catch( Throwable exc )
{
throw new TaskException( "Unable to instantiate listener " + className, exc );
}
}
}

/**
* Helper to get the parent file for a given file. <P>
*
* Added to simulate File.getParentFile() from JDK 1.2.
*
* @param file File
* @return Parent file or null if none
*/
private File getParentFile( File file )
{
String filename = file.getAbsolutePath();
file = new File( filename );
filename = file.getParent();

if( filename != null && msgOutputLevel >= Project.MSG_VERBOSE )
{
System.out.println( "Searching in " + filename );
}

return ( filename == null ) ? null : new File( filename );
}

/**
* Creates the default build logger for sending build events to the ant log.
*
* @return Description of the Returned Value
*/
private BuildLogger createLogger()
{
BuildLogger logger = null;
if( loggerClassname != null )
{
try
{
logger = (BuildLogger)( Class.forName( loggerClassname ).newInstance() );
}
catch( ClassCastException e )
{
System.err.println( "The specified logger class " + loggerClassname +
" does not implement the BuildLogger interface" );
throw new RuntimeException();
}
catch( Exception e )
{
System.err.println( "Unable to instantiate specified logger class " +
loggerClassname + " : " + e.getClass().getName() );
throw new RuntimeException();
}
}
else
{
logger = new DefaultLogger();
}

logger.setMessageOutputLevel( msgOutputLevel );
logger.setOutputPrintStream( out );
logger.setErrorPrintStream( err );
logger.setEmacsMode( emacsMode );

return logger;
}

/**
* Search parent directories for the build file. <P>
*
* Takes the given target as a suffix to append to each parent directory in
* seach of a build file. Once the root of the file-system has been reached
* an exception is thrown.
*
* @param suffix Suffix filename to look for in parents.
* @param start Description of Parameter
* @return A handle to the build file
* @exception TaskException Failed to locate a build file
*/
private File findBuildFile( String start, String suffix )
throws TaskException
{
if( msgOutputLevel >= Project.MSG_INFO )
{
System.out.println( "Searching for " + suffix + " ..." );
}

File parent = new File( new File( start ).getAbsolutePath() );
File file = new File( parent, suffix );

// check if the target file exists in the current directory
while( !file.exists() )
{
// change to parent directory
parent = getParentFile( parent );

// if parent is null, then we are at the root of the fs,
// complain that we can't find the build file.
if( parent == null )
{
throw new TaskException( "Could not locate a build file!" );
}

// refresh our file handle
file = new File( parent, suffix );
}

return file;
}

/**
* Executes the build.
*
* @param coreLoader Description of Parameter
* @exception TaskException Description of Exception
*/
private void runBuild( ClassLoader coreLoader )
throws TaskException
{

if( !readyToRun )
{
return;
}

// track when we started

if( msgOutputLevel >= Project.MSG_INFO )
{
System.out.println( "Buildfile: " + buildFile );
}

final Project project = new Project();
project.setCoreLoader( coreLoader );

Throwable error = null;

try
{
addBuildListeners( project );

PrintStream err = System.err;
PrintStream out = System.out;

// use a system manager that prevents from System.exit()
// only in JDK > 1.1
SecurityManager oldsm = null;
if( !Project.JAVA_1_0.equals( Project.getJavaVersion() ) &&
!Project.JAVA_1_1.equals( Project.getJavaVersion() ) )
{
oldsm = System.getSecurityManager();

//SecurityManager can not be installed here for backwards
//compatability reasons (PD). Needs to be loaded prior to
//ant class if we are going to implement it.
//System.setSecurityManager(new NoExitSecurityManager());
}
try
{
System.setOut( new PrintStream( new DemuxOutputStream( project, false ) ) );
System.setErr( new PrintStream( new DemuxOutputStream( project, true ) ) );

if( !projectHelp )
{
project.fireBuildStarted();
}
project.init();
project.setUserProperty( "ant.version", getAntVersion() );

// set user-define properties
Enumeration e = definedProps.keys();
while( e.hasMoreElements() )
{
String arg = (String)e.nextElement();
String value = (String)definedProps.get( arg );
project.setUserProperty( arg, value );
}

project.setUserProperty( "ant.file", buildFile.getAbsolutePath() );

// first use the ProjectHelper to create the project object
// from the given build file.
String noParserMessage =
"No JAXP compliant XML parser found. Please visit http://xml.apache.org for a suitable parser";
try
{
Class.forName( "javax.xml.parsers.SAXParserFactory" );
ProjectHelper.configureProject( project, buildFile );
}
catch( NoClassDefFoundError ncdfe )
{
throw new TaskException( noParserMessage, ncdfe );
}
catch( ClassNotFoundException cnfe )
{
throw new TaskException( noParserMessage, cnfe );
}
catch( NullPointerException npe )
{
throw new TaskException( noParserMessage, npe );
}

if( projectHelp )
{
printDescription( project );
printTargets( project, msgOutputLevel > Project.MSG_INFO );
return;
}

// make sure that we have a target to execute
if( targets.size() == 0 )
{
targets.addElement( project.getDefaultTarget() );
}

project.executeTargets( targets );
}
finally
{
// put back the original security manager
//The following will never eval to true. (PD)
if( oldsm != null )
{
System.setSecurityManager( oldsm );
}

System.setOut( out );
System.setErr( err );
}
}
catch( RuntimeException exc )
{
error = exc;
throw exc;
}
catch( Error err )
{
error = err;
throw err;
}
finally
{
if( !projectHelp )
{
project.fireBuildFinished( error );
}
}
}
}

+ 0
- 843
proposal/myrmidon/src/todo/org/apache/tools/ant/Main.java View File

@@ -1,843 +0,0 @@
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE file.
*/
package org.apache.tools.ant;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Enumeration;
import java.util.Properties;
import java.util.Vector;
import org.apache.myrmidon.api.TaskException;

/**
* Command line entry point into Ant. This class is entered via the cannonical
* `public static void main` entry point and reads the command line arguments.
* It then assembles and executes an Ant project. <p>
*
* If you integrating Ant into some other tool, this is not the class to use as
* an entry point. Please see the source code of this class to see how it
* manipulates the Ant project classes.
*
* @author duncan@x180.com
*/
public class Main
{

/**
* The default build file name
*/
public final static String DEFAULT_BUILD_FILENAME = "build.xml";

private static String antVersion = null;

/**
* Our current message output status. Follows Project.MSG_XXX
*/
private int msgOutputLevel = Project.MSG_INFO;
/**
* null
*/

/**
* Stream that we are using for logging
*/
private PrintStream out = System.out;

/**
* Stream that we are using for logging error messages
*/
private PrintStream err = System.err;

/**
* The build targets
*/
private Vector targets = new Vector( 5 );

/**
* Set of properties that can be used by tasks
*/
private Properties definedProps = new Properties();

/**
* Names of classes to add as listeners to project
*/
private Vector listeners = new Vector( 5 );

/**
* The Ant logger class. There may be only one logger. It will have the
* right to use the 'out' PrintStream. The class must implements the
* BuildLogger interface
*/
private String loggerClassname = null;

/**
* Indicates whether output to the log is to be unadorned.
*/
private boolean emacsMode = false;

/**
* Indicates if this ant should be run.
*/
private boolean readyToRun = false;

/**
* Indicates we should only parse and display the project help information
*/
private boolean projectHelp = false;

/**
* File that we are using for configuration
*/
private File buildFile;

protected Main( String[] args )
throws TaskException
{

String searchForThis = null;

// cycle through given args

for( int i = 0; i < args.length; i++ )
{
String arg = args[ i ];

if( arg.equals( "-help" ) )
{
printUsage();
return;
}
else if( arg.equals( "-version" ) )
{
printVersion();
return;
}
else if( arg.equals( "-quiet" ) || arg.equals( "-q" ) )
{
msgOutputLevel = Project.MSG_WARN;
}
else if( arg.equals( "-verbose" ) || arg.equals( "-v" ) )
{
printVersion();
msgOutputLevel = Project.MSG_VERBOSE;
}
else if( arg.equals( "-debug" ) )
{
printVersion();
msgOutputLevel = Project.MSG_DEBUG;
}
else if( arg.equals( "-logfile" ) || arg.equals( "-l" ) )
{
try
{
File logFile = new File( args[ i + 1 ] );
i++;
out = new PrintStream( new FileOutputStream( logFile ) );
err = out;
System.setOut( out );
System.setErr( out );
}
catch( IOException ioe )
{
String msg = "Cannot write on the specified log file. " +
"Make sure the path exists and you have write permissions.";
System.out.println( msg );
return;
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
String msg = "You must specify a log file when " +
"using the -log argument";
System.out.println( msg );
return;
}
}
else if( arg.equals( "-buildfile" ) || arg.equals( "-file" ) || arg.equals( "-f" ) )
{
try
{
buildFile = new File( args[ i + 1 ] );
i++;
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
String msg = "You must specify a buildfile when " +
"using the -buildfile argument";
System.out.println( msg );
return;
}
}
else if( arg.equals( "-listener" ) )
{
try
{
listeners.addElement( args[ i + 1 ] );
i++;
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
String msg = "You must specify a classname when " +
"using the -listener argument";
System.out.println( msg );
return;
}
}
else if( arg.startsWith( "-D" ) )
{

/*
* Interestingly enough, we get to here when a user
* uses -Dname=value. However, in some cases, the JDK
* goes ahead * and parses this out to args
* {"-Dname", "value"}
* so instead of parsing on "=", we just make the "-D"
* characters go away and skip one argument forward.
*
* I don't know how to predict when the JDK is going
* to help or not, so we simply look for the equals sign.
*/
String name = arg.substring( 2, arg.length() );
String value = null;
int posEq = name.indexOf( "=" );
if( posEq > 0 )
{
value = name.substring( posEq + 1 );
name = name.substring( 0, posEq );
}
else if( i < args.length - 1 )
value = args[ ++i ];

definedProps.put( name, value );
}
else if( arg.equals( "-logger" ) )
{
if( loggerClassname != null )
{
System.out.println( "Only one logger class may be specified." );
return;
}
try
{
loggerClassname = args[ ++i ];
}
catch( ArrayIndexOutOfBoundsException aioobe )
{
System.out.println( "You must specify a classname when " +
"using the -logger argument" );
return;
}
}
else if( arg.equals( "-emacs" ) )
{
emacsMode = true;
}
else if( arg.equals( "-projecthelp" ) )
{
// set the flag to display the targets and quit
projectHelp = true;
}
else if( arg.equals( "-find" ) )
{
// eat up next arg if present, default to build.xml
if( i < args.length - 1 )
{
searchForThis = args[ ++i ];
}
else
{
searchForThis = DEFAULT_BUILD_FILENAME;
}
}
else if( arg.startsWith( "-" ) )
{
// we don't have any more args to recognize!
String msg = "Unknown argument: " + arg;
System.out.println( msg );
printUsage();
return;
}
else
{
// if it's no other arg, it may be the target
targets.addElement( arg );
}

}

// if buildFile was not specified on the command line,
if( buildFile == null )
{
// but -find then search for it
if( searchForThis != null )
{
buildFile = findBuildFile( System.getProperty( "user.dir" ),
searchForThis );
}
else
{
buildFile = new File( DEFAULT_BUILD_FILENAME );
}
}

// make sure buildfile exists
if( !buildFile.exists() )
{
System.out.println( "Buildfile: " + buildFile + " does not exist!" );
throw new TaskException( "Build failed" );
}

// make sure it's not a directory (this falls into the ultra
// paranoid lets check everything catagory

if( buildFile.isDirectory() )
{
System.out.println( "What? Buildfile: " + buildFile + " is a dir!" );
throw new TaskException( "Build failed" );
}

readyToRun = true;
}

public static synchronized String getAntVersion()
throws TaskException
{
if( antVersion == null )
{
try
{
Properties props = new Properties();
InputStream in =
Main.class.getResourceAsStream( "/org/apache/tools/ant/version.txt" );
props.load( in );
in.close();

String lSep = System.getProperty( "line.separator" );
StringBuffer msg = new StringBuffer();
msg.append( "Apache Ant version " );
msg.append( props.getProperty( "VERSION" ) );
msg.append( " compiled on " );
msg.append( props.getProperty( "DATE" ) );
antVersion = msg.toString();
}
catch( IOException ioe )
{
throw new TaskException( "Could not load the version information:"
+ ioe.getMessage() );
}
catch( NullPointerException npe )
{
throw new TaskException( "Could not load the version information." );
}
}
return antVersion;
}

/**
* Command line entry point. This method kicks off the building of a project
* object and executes a build using either a given target or the default
* target.
*
* @param args Command line args.
*/
public static void main( String[] args )
{
start( args, null, null );
}

/**
* Entry point method.
*
* @param args Description of Parameter
* @param additionalUserProperties Description of Parameter
* @param coreLoader Description of Parameter
*/
public static void start( String[] args, Properties additionalUserProperties,
ClassLoader coreLoader )
{
Main m = null;

try
{
m = new Main( args );
}
catch( Throwable exc )
{
printMessage( exc );
System.exit( 1 );
}

if( additionalUserProperties != null )
{
for( Enumeration e = additionalUserProperties.keys(); e.hasMoreElements(); )
{
String key = (String)e.nextElement();
String property = additionalUserProperties.getProperty( key );
m.definedProps.put( key, property );
}
}

try
{
m.runBuild( coreLoader );
System.exit( 0 );
}
catch( TaskException be )
{
if( m.err != System.err )
{
printMessage( be );
}
System.exit( 1 );
}
catch( Throwable exc )
{
exc.printStackTrace();
printMessage( exc );
System.exit( 1 );
}
}

/**
* Search for the insert position to keep names a sorted list of Strings
*
* @param names Description of Parameter
* @param name Description of Parameter
* @return Description of the Returned Value
*/
private static int findTargetPosition( Vector names, String name )
{
int res = names.size();
for( int i = 0; i < names.size() && res == names.size(); i++ )
{
if( name.compareTo( (String)names.elementAt( i ) ) < 0 )
{
res = i;
}
}
return res;
}

/**
* Print the project description, if any
*
* @param project Description of Parameter
*/
private static void printDescription( Project project )
{
if( project.getDescription() != null )
{
System.out.println( project.getDescription() );
}
}

/**
* Prints the message of the Throwable if it's not null.
*
* @param t Description of Parameter
*/
private static void printMessage( Throwable t )
{
String message = t.getMessage();
if( message != null )
{
System.err.println( message );
}
}

/**
* Print out a list of all targets in the current buildfile
*
* @param project Description of Parameter
* @param printSubTargets Description of Parameter
*/
private static void printTargets( Project project, boolean printSubTargets )
{
// find the target with the longest name
int maxLength = 0;
Enumeration ptargets = project.getTargets().elements();
String targetName;
String targetDescription;
Target currentTarget;
// split the targets in top-level and sub-targets depending
// on the presence of a description
Vector topNames = new Vector();
Vector topDescriptions = new Vector();
Vector subNames = new Vector();

while( ptargets.hasMoreElements() )
{
currentTarget = (Target)ptargets.nextElement();
targetName = currentTarget.getName();
targetDescription = currentTarget.getDescription();
// maintain a sorted list of targets
if( targetDescription == null )
{
int pos = findTargetPosition( subNames, targetName );
subNames.insertElementAt( targetName, pos );
}
else
{
int pos = findTargetPosition( topNames, targetName );
topNames.insertElementAt( targetName, pos );
topDescriptions.insertElementAt( targetDescription, pos );
if( targetName.length() > maxLength )
{
maxLength = targetName.length();
}
}
}

printTargets( topNames, topDescriptions, "Main targets:", maxLength );

if( printSubTargets )
{
printTargets( subNames, null, "Subtargets:", 0 );
}

String defaultTarget = project.getDefaultTarget();
if( defaultTarget != null && !"".equals( defaultTarget ) )
{// shouldn't need to check but...
System.out.println( "Default target: " + defaultTarget );
}
}

/**
* Output a formatted list of target names with an optional description
*
* @param names Description of Parameter
* @param descriptions Description of Parameter
* @param heading Description of Parameter
* @param maxlen Description of Parameter
*/
private static void printTargets( Vector names, Vector descriptions, String heading, int maxlen )
{
// now, start printing the targets and their descriptions
String lSep = System.getProperty( "line.separator" );
// got a bit annoyed that I couldn't find a pad function
String spaces = " ";
while( spaces.length() < maxlen )
{
spaces += spaces;
}
StringBuffer msg = new StringBuffer();
msg.append( heading + lSep + lSep );
for( int i = 0; i < names.size(); i++ )
{
msg.append( " " );
msg.append( names.elementAt( i ) );
if( descriptions != null )
{
msg.append( spaces.substring( 0, maxlen - ( (String)names.elementAt( i ) ).length() + 2 ) );
msg.append( descriptions.elementAt( i ) );
}
msg.append( lSep );
}
System.out.println( msg.toString() );
}

/**
* Prints the usage of how to use this class to System.out
*/
private static void printUsage()
{
String lSep = System.getProperty( "line.separator" );
StringBuffer msg = new StringBuffer();
msg.append( "ant [options] [target [target2 [target3] ...]]" + lSep );
msg.append( "Options: " + lSep );
msg.append( " -help print this message" + lSep );
msg.append( " -projecthelp print project help information" + lSep );
msg.append( " -version print the version information and exit" + lSep );
msg.append( " -quiet be extra quiet" + lSep );
msg.append( " -verbose be extra verbose" + lSep );
msg.append( " -debug print debugging information" + lSep );
msg.append( " -emacs produce logging information without adornments" + lSep );
msg.append( " -logfile <file> use given file for log" + lSep );
msg.append( " -logger <classname> the class which is to perform logging" + lSep );
msg.append( " -listener <classname> add an instance of class as a project listener" + lSep );
msg.append( " -buildfile <file> use given buildfile" + lSep );
msg.append( " -D<property>=<value> use value for given property" + lSep );
msg.append( " -find <file> search for buildfile towards the root of the" + lSep );
msg.append( " filesystem and use it" + lSep );
System.out.println( msg.toString() );
}

private static void printVersion()
throws TaskException
{
System.out.println( getAntVersion() );
}

protected void addBuildListeners( Project project )
throws TaskException
{
// Add the default listener
project.addBuildListener( createLogger() );

for( int i = 0; i < listeners.size(); i++ )
{
String className = (String)listeners.elementAt( i );
try
{
BuildListener listener =
(BuildListener)Class.forName( className ).newInstance();
project.addBuildListener( listener );
}
catch( Throwable exc )
{
throw new TaskException( "Unable to instantiate listener " + className, exc );
}
}
}

/**
* Helper to get the parent file for a given file. <P>
*
* Added to simulate File.getParentFile() from JDK 1.2.
*
* @param file File
* @return Parent file or null if none
*/
private File getParentFile( File file )
{
String filename = file.getAbsolutePath();
file = new File( filename );
filename = file.getParent();

if( filename != null && msgOutputLevel >= Project.MSG_VERBOSE )
{
System.out.println( "Searching in " + filename );
}

return ( filename == null ) ? null : new File( filename );
}

/**
* Creates the default build logger for sending build events to the ant log.
*
* @return Description of the Returned Value
*/
private BuildLogger createLogger()
{
BuildLogger logger = null;
if( loggerClassname != null )
{
try
{
logger = (BuildLogger)( Class.forName( loggerClassname ).newInstance() );
}
catch( ClassCastException e )
{
System.err.println( "The specified logger class " + loggerClassname +
" does not implement the BuildLogger interface" );
throw new RuntimeException();
}
catch( Exception e )
{
System.err.println( "Unable to instantiate specified logger class " +
loggerClassname + " : " + e.getClass().getName() );
throw new RuntimeException();
}
}
else
{
logger = new DefaultLogger();
}

logger.setMessageOutputLevel( msgOutputLevel );
logger.setOutputPrintStream( out );
logger.setErrorPrintStream( err );
logger.setEmacsMode( emacsMode );

return logger;
}

/**
* Search parent directories for the build file. <P>
*
* Takes the given target as a suffix to append to each parent directory in
* seach of a build file. Once the root of the file-system has been reached
* an exception is thrown.
*
* @param suffix Suffix filename to look for in parents.
* @param start Description of Parameter
* @return A handle to the build file
* @exception TaskException Failed to locate a build file
*/
private File findBuildFile( String start, String suffix )
throws TaskException
{
if( msgOutputLevel >= Project.MSG_INFO )
{
System.out.println( "Searching for " + suffix + " ..." );
}

File parent = new File( new File( start ).getAbsolutePath() );
File file = new File( parent, suffix );

// check if the target file exists in the current directory
while( !file.exists() )
{
// change to parent directory
parent = getParentFile( parent );

// if parent is null, then we are at the root of the fs,
// complain that we can't find the build file.
if( parent == null )
{
throw new TaskException( "Could not locate a build file!" );
}

// refresh our file handle
file = new File( parent, suffix );
}

return file;
}

/**
* Executes the build.
*
* @param coreLoader Description of Parameter
* @exception TaskException Description of Exception
*/
private void runBuild( ClassLoader coreLoader )
throws TaskException
{

if( !readyToRun )
{
return;
}

// track when we started

if( msgOutputLevel >= Project.MSG_INFO )
{
System.out.println( "Buildfile: " + buildFile );
}

final Project project = new Project();
project.setCoreLoader( coreLoader );

Throwable error = null;

try
{
addBuildListeners( project );

PrintStream err = System.err;
PrintStream out = System.out;

// use a system manager that prevents from System.exit()
// only in JDK > 1.1
SecurityManager oldsm = null;
if( !Project.JAVA_1_0.equals( Project.getJavaVersion() ) &&
!Project.JAVA_1_1.equals( Project.getJavaVersion() ) )
{
oldsm = System.getSecurityManager();

//SecurityManager can not be installed here for backwards
//compatability reasons (PD). Needs to be loaded prior to
//ant class if we are going to implement it.
//System.setSecurityManager(new NoExitSecurityManager());
}
try
{
System.setOut( new PrintStream( new DemuxOutputStream( project, false ) ) );
System.setErr( new PrintStream( new DemuxOutputStream( project, true ) ) );

if( !projectHelp )
{
project.fireBuildStarted();
}
project.init();
project.setUserProperty( "ant.version", getAntVersion() );

// set user-define properties
Enumeration e = definedProps.keys();
while( e.hasMoreElements() )
{
String arg = (String)e.nextElement();
String value = (String)definedProps.get( arg );
project.setUserProperty( arg, value );
}

project.setUserProperty( "ant.file", buildFile.getAbsolutePath() );

// first use the ProjectHelper to create the project object
// from the given build file.
String noParserMessage =
"No JAXP compliant XML parser found. Please visit http://xml.apache.org for a suitable parser";
try
{
Class.forName( "javax.xml.parsers.SAXParserFactory" );
ProjectHelper.configureProject( project, buildFile );
}
catch( NoClassDefFoundError ncdfe )
{
throw new TaskException( noParserMessage, ncdfe );
}
catch( ClassNotFoundException cnfe )
{
throw new TaskException( noParserMessage, cnfe );
}
catch( NullPointerException npe )
{
throw new TaskException( noParserMessage, npe );
}

if( projectHelp )
{
printDescription( project );
printTargets( project, msgOutputLevel > Project.MSG_INFO );
return;
}

// make sure that we have a target to execute
if( targets.size() == 0 )
{
targets.addElement( project.getDefaultTarget() );
}

project.executeTargets( targets );
}
finally
{
// put back the original security manager
//The following will never eval to true. (PD)
if( oldsm != null )
{
System.setSecurityManager( oldsm );
}

System.setOut( out );
System.setErr( err );
}
}
catch( RuntimeException exc )
{
error = exc;
throw exc;
}
catch( Error err )
{
error = err;
throw err;
}
finally
{
if( !projectHelp )
{
project.fireBuildFinished( error );
}
}
}
}

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