o creating an interface for a tool that generally runs plexus components from a CLI interface

I will try and merge this with John's CLIng, but this assumes everything is in the classpath already
  and doesn't use a Maven repository like CLIng. I'm just create 4-5 different CLI interfaces for Plexus
  stuff and I'm getting tired of doing the same thing over and over again.



git-svn-id: https://svn.apache.org/repos/asf/maven/archiva/trunk@476704 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jason van Zyl 2006-11-19 04:42:34 +00:00
parent a45320f77c
commit 16851b5a14
4 changed files with 561 additions and 499 deletions

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package org.apache.maven.archiva.cli;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.codehaus.classworlds.ClassWorld;
import org.codehaus.plexus.DefaultPlexusContainer;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.PlexusContainerException;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import javax.naming.OperationNotSupportedException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
/**
* @author jason van zyl
* @version $Id$
* @noinspection UseOfSystemOutOrSystemErr,ACCESS_STATIC_VIA_INSTANCE
*/
public abstract class AbstractCli
implements Cli
{
// ----------------------------------------------------------------------------
// These are standard options that we would want to use for all our projects.
// ----------------------------------------------------------------------------
public static final char QUIET = 'q';
public static final char DEBUG = 'X';
public static final char ERRORS = 'e';
public static final char HELP = 'h';
public static final char VERSION = 'v';
public static final char SET_SYSTEM_PROPERTY = 'D';
// ----------------------------------------------------------------------------
// Abstract methods
// ----------------------------------------------------------------------------
protected static Cli getCli()
{
throw new UnsupportedOperationException( "You must implement this getCli() in your subclass." );
}
protected abstract Options buildOptions( Options options );
protected abstract void processOptions( CommandLine cli,
PlexusContainer container )
throws Exception;
protected abstract String getPomPropertiesPath();
// ----------------------------------------------------------------------------
//
// ----------------------------------------------------------------------------
public static void main( String[] args )
{
ClassWorld classWorld = new ClassWorld( "plexus.core", Thread.currentThread().getContextClassLoader() );
int result = main( args, classWorld );
System.exit( result );
}
/**
* @noinspection ConfusingMainMethod
*/
public static int main( String[] args,
ClassWorld classWorld )
{
return getCli().execute( args, classWorld );
}
public int execute( String[] args,
ClassWorld classWorld )
{
CommandLine cli;
try
{
cli = parse( args );
}
catch ( ParseException e )
{
System.err.println( "Unable to parse command line options: " + e.getMessage() );
displayHelp();
return 1;
}
if ( System.getProperty( "java.class.version", "44.0" ).compareTo( "48.0" ) < 0 )
{
System.err.println( "Sorry, but JDK 1.4 or above is required to execute Maven" );
System.err.println(
"You appear to be using Java version: " + System.getProperty( "java.version", "<unknown>" ) );
return 1;
}
boolean debug = cli.hasOption( DEBUG );
boolean quiet = !debug && cli.hasOption( QUIET );
boolean showErrors = debug || cli.hasOption( ERRORS );
if ( showErrors )
{
System.out.println( "+ Error stacktraces are turned on." );
}
// ----------------------------------------------------------------------------
// Logging
// ----------------------------------------------------------------------------
int loggingLevel;
if ( debug )
{
loggingLevel = 0;
}
else if ( quiet )
{
loggingLevel = 0;
}
else
{
loggingLevel = 0;
}
// ----------------------------------------------------------------------
// Process particular command line options
// ----------------------------------------------------------------------
if ( cli.hasOption( HELP ) )
{
displayHelp();
return 0;
}
if ( cli.hasOption( VERSION ) )
{
showVersion();
return 0;
}
else if ( debug )
{
showVersion();
}
// ----------------------------------------------------------------------------
// This is what we will generalize for the invocation of the command line.
// ----------------------------------------------------------------------------
try
{
PlexusContainer plexus = new DefaultPlexusContainer( "plexus.core", classWorld );
processOptions( cli, plexus );
}
catch ( PlexusContainerException e )
{
showFatalError( "Cannot create Plexus container.", e, true );
}
catch ( ComponentLookupException e )
{
showError( "Cannot lookup application component.", e, true );
}
catch ( Exception e )
{
showError( "Problem executing command line.", e, true );
}
return 0;
}
protected int showFatalError( String message,
Exception e,
boolean show )
{
System.err.println( "FATAL ERROR: " + message );
if ( show )
{
System.err.println( "Error stacktrace:" );
e.printStackTrace();
}
else
{
System.err.println( "For more information, run with the -e flag" );
}
return 1;
}
protected void showError( String message,
Exception e,
boolean show )
{
System.err.println( message );
if ( show )
{
System.err.println( "Error stacktrace:" );
e.printStackTrace();
}
}
// Need to get the versions of the application in a general way, so that I need a way to get the
// specifics of the application so that I can do this in a general way.
private void showVersion()
{
InputStream resourceAsStream;
try
{
Properties properties = new Properties();
resourceAsStream = AbstractCli.class.getClassLoader().getResourceAsStream( getPomPropertiesPath() );
properties.load( resourceAsStream );
if ( properties.getProperty( "builtOn" ) != null )
{
System.out.println( "Maven version: " + properties.getProperty( "version", "unknown" ) + " built on " +
properties.getProperty( "builtOn" ) );
}
else
{
System.out.println( "Maven version: " + properties.getProperty( "version", "unknown" ) );
}
}
catch ( IOException e )
{
System.err.println( "Unable determine version from JAR file: " + e.getMessage() );
}
}
// ----------------------------------------------------------------------
// System properties handling
// ----------------------------------------------------------------------
private Properties getExecutionProperties( CommandLine commandLine )
{
Properties executionProperties = new Properties();
// ----------------------------------------------------------------------
// Options that are set on the command line become system properties
// and therefore are set in the session properties. System properties
// are most dominant.
// ----------------------------------------------------------------------
if ( commandLine.hasOption( SET_SYSTEM_PROPERTY ) )
{
String[] defStrs = commandLine.getOptionValues( SET_SYSTEM_PROPERTY );
for ( int i = 0; i < defStrs.length; ++i )
{
setCliProperty( defStrs[i], executionProperties );
}
}
executionProperties.putAll( System.getProperties() );
return executionProperties;
}
private void setCliProperty( String property,
Properties executionProperties )
{
String name;
String value;
int i = property.indexOf( "=" );
if ( i <= 0 )
{
name = property.trim();
value = "true";
}
else
{
name = property.substring( 0, i ).trim();
value = property.substring( i + 1 ).trim();
}
executionProperties.setProperty( name, value );
// ----------------------------------------------------------------------
// I'm leaving the setting of system properties here as not to break
// the SystemPropertyProfileActivator. This won't harm embedding. jvz.
// ----------------------------------------------------------------------
System.setProperty( name, value );
}
private Options options;
public Options buildOptions()
{
options = new Options();
return buildOptions( options );
}
public CommandLine parse( String[] args )
throws ParseException
{
// We need to eat any quotes surrounding arguments...
String[] cleanArgs = cleanArgs( args );
CommandLineParser parser = new GnuParser();
return parser.parse( buildOptions(), cleanArgs );
}
private static String[] cleanArgs( String[] args )
{
List cleaned = new ArrayList();
StringBuffer currentArg = null;
for ( int i = 0; i < args.length; i++ )
{
String arg = args[i];
boolean addedToBuffer = false;
if ( arg.startsWith( "\"" ) )
{
// if we're in the process of building up another arg, push it and start over.
// this is for the case: "-Dfoo=bar "-Dfoo2=bar two" (note the first unterminated quote)
if ( currentArg != null )
{
cleaned.add( currentArg.toString() );
}
// start building an argument here.
currentArg = new StringBuffer( arg.substring( 1 ) );
addedToBuffer = true;
}
// this has to be a separate "if" statement, to capture the case of: "-Dfoo=bar"
if ( arg.endsWith( "\"" ) )
{
String cleanArgPart = arg.substring( 0, arg.length() - 1 );
// if we're building an argument, keep doing so.
if ( currentArg != null )
{
// if this is the case of "-Dfoo=bar", then we need to adjust the buffer.
if ( addedToBuffer )
{
currentArg.setLength( currentArg.length() - 1 );
}
// otherwise, we trim the trailing " and append to the buffer.
else
{
// TODO: introducing a space here...not sure what else to do but collapse whitespace
currentArg.append( ' ' ).append( cleanArgPart );
}
// we're done with this argument, so add it.
cleaned.add( currentArg.toString() );
}
else
{
// this is a simple argument...just add it.
cleaned.add( cleanArgPart );
}
// the currentArg MUST be finished when this completes.
currentArg = null;
continue;
}
// if we haven't added this arg to the buffer, and we ARE building an argument
// buffer, then append it with a preceding space...again, not sure what else to
// do other than collapse whitespace.
// NOTE: The case of a trailing quote is handled by nullifying the arg buffer.
if ( !addedToBuffer )
{
// append to the argument we're building, collapsing whitespace to a single space.
if ( currentArg != null )
{
currentArg.append( ' ' ).append( arg );
}
// this is a loner, just add it directly.
else
{
cleaned.add( arg );
}
}
}
// clean up.
if ( currentArg != null )
{
cleaned.add( currentArg.toString() );
}
int cleanedSz = cleaned.size();
String[] cleanArgs = null;
if ( cleanedSz == 0 )
{
// if we didn't have any arguments to clean, simply pass the original array through
cleanArgs = args;
}
else
{
cleanArgs = (String[]) cleaned.toArray( new String[cleanedSz] );
}
return cleanArgs;
}
public void displayHelp()
{
System.out.println();
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp( "mvn [options] [<goal(s)>] [<phase(s)>]", "\nOptions:", options, "\n" );
}
}

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package org.apache.maven.archiva.cli;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.util.StringUtils;
import org.apache.maven.archiva.Archiva;
import org.apache.maven.archiva.discoverer.DiscovererException;
import org.apache.maven.archiva.converter.RepositoryConversionException;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import java.util.Properties;
import java.util.List;
import java.util.Arrays;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.File;
/**
* @author Jason van Zyl
*/
public class ArchivaCli
extends AbstractCli
{
public static final char CONVERT = 'c';
public static final String SOURCE_REPO_PATH = "sourceRepositoryPath";
public static final String TARGET_REPO_PATH = "targetRepositoryPath";
public static final String BLACKLISTED_PATTERNS = "blacklistPatterns";
// ----------------------------------------------------------------------------
//
// ----------------------------------------------------------------------------
protected static Cli getCli()
{
return new ArchivaCli();
}
protected String getPomPropertiesPath()
{
return "META-INF/maven/org.apache.maven/maven-core/pom.properties";
}
protected Options buildOptions( Options options )
{
options.addOption( OptionBuilder.withLongOpt( "convert" ).hasArg().withDescription(
"Convert a legacy Maven 1.x repository to a Maven 2.x repository using a properties file to describe the conversion." )
.create( CONVERT ) );
return options;
}
public void processOptions( CommandLine cli,
PlexusContainer plexus )
throws Exception
{
Archiva archiva = (Archiva) plexus.lookup( Archiva.ROLE );
if ( cli.hasOption( CONVERT ) )
{
Properties p = new Properties();
try
{
p.load( new FileInputStream( cli.getOptionValue( CONVERT ) ) );
}
catch ( IOException e )
{
showFatalError( "Cannot find properties file which describes the conversion.", e, true );
}
File oldRepositoryPath = new File( p.getProperty( SOURCE_REPO_PATH ) );
File newRepositoryPath = new File( p.getProperty( TARGET_REPO_PATH ) );
System.out.println( "Converting " + oldRepositoryPath + " to " + newRepositoryPath );
List blacklistedPatterns = null;
String s = p.getProperty( BLACKLISTED_PATTERNS );
if ( s != null )
{
blacklistedPatterns = Arrays.asList( StringUtils.split( s, "," ) );
}
try
{
archiva.convertLegacyRepository( oldRepositoryPath, newRepositoryPath, blacklistedPatterns, true );
}
catch ( RepositoryConversionException e )
{
showFatalError( "Error converting repository.", e, true );
}
catch ( DiscovererException e )
{
showFatalError( "Error discovery artifacts to convert.", e, true );
}
}
}
}

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@ -1,339 +1,23 @@
package org.apache.maven.archiva.cli; package org.apache.maven.archiva.cli;
/*
* Copyright 2001-2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.ParseException;
import org.apache.maven.archiva.Archiva;
import org.apache.maven.archiva.discoverer.DiscovererException;
import org.apache.maven.archiva.converter.RepositoryConversionException;
import org.codehaus.classworlds.ClassWorld; import org.codehaus.classworlds.ClassWorld;
import org.codehaus.plexus.PlexusContainer; import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.DefaultPlexusContainer; import org.apache.commons.cli.Options;
import org.codehaus.plexus.PlexusContainerException; import org.apache.commons.cli.CommandLine;
import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import java.io.IOException;
import java.io.InputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.Properties;
import java.util.List;
import java.util.Arrays;
/** /**
* @author jason van zyl * @author Jason van Zyl
* @version $Id$
* @noinspection UseOfSystemOutOrSystemErr,ACCESS_STATIC_VIA_INSTANCE
* @todo complete separate out the general cli processing
* @todo create a simple component to do the invocation
*/ */
public class Cli public interface Cli
{ {
public static final String SOURCE_REPO_PATH = "sourceRepositoryPath"; int execute( String[] args,
ClassWorld classWorld );
public static final String TARGET_REPO_PATH = "targetRepositoryPath"; Options buildOptions( Options options );
public static final String BLACKLISTED_PATTERNS = "blacklistPatterns"; void processOptions( CommandLine cli,
PlexusContainer container )
throws Exception;
public static void main( String[] args ) String getPomPropertiesPath();
{
ClassWorld classWorld = new ClassWorld( "plexus.core", Thread.currentThread().getContextClassLoader() );
int result = main( args, classWorld );
System.exit( result );
}
/**
* @noinspection ConfusingMainMethod
*/
public static int main( String[] args,
ClassWorld classWorld )
{
// ----------------------------------------------------------------------
// Setup the command line parser
// ----------------------------------------------------------------------
CliManager cliManager = new CliManager();
CommandLine cli;
try
{
cli = cliManager.parse( args );
}
catch ( ParseException e )
{
System.err.println( "Unable to parse command line options: " + e.getMessage() );
cliManager.displayHelp();
return 1;
}
if ( System.getProperty( "java.class.version", "44.0" ).compareTo( "48.0" ) < 0 )
{
System.err.println( "Sorry, but JDK 1.4 or above is required to execute Maven" );
System.err.println(
"You appear to be using Java version: " + System.getProperty( "java.version", "<unknown>" ) );
return 1;
}
boolean debug = cli.hasOption( CliManager.DEBUG );
boolean quiet = !debug && cli.hasOption( CliManager.QUIET );
boolean showErrors = debug || cli.hasOption( CliManager.ERRORS );
if ( showErrors )
{
System.out.println( "+ Error stacktraces are turned on." );
}
// ----------------------------------------------------------------------------
// Logging
// ----------------------------------------------------------------------------
int loggingLevel;
if ( debug )
{
loggingLevel = 0; //MavenExecutionRequest.LOGGING_LEVEL_DEBUG;
}
else if ( quiet )
{
loggingLevel = 0; //MavenExecutionRequest.LOGGING_LEVEL_ERROR;
}
else
{
loggingLevel = 0; //MavenExecutionRequest.LOGGING_LEVEL_INFO;
}
// ----------------------------------------------------------------------
// Process particular command line options
// ----------------------------------------------------------------------
if ( cli.hasOption( CliManager.HELP ) )
{
cliManager.displayHelp();
return 0;
}
if ( cli.hasOption( CliManager.VERSION ) )
{
showVersion();
return 0;
}
else if ( debug )
{
showVersion();
}
// ----------------------------------------------------------------------------
// This is what we will generalize for the invocation of the command line.
// ----------------------------------------------------------------------------
try
{
PlexusContainer plexus = new DefaultPlexusContainer( "plexus.core", classWorld );
Archiva archiva = (Archiva) plexus.lookup( Archiva.ROLE );
if ( cli.hasOption( CliManager.CONVERT ) )
{
Properties p = new Properties();
try
{
p.load( new FileInputStream( cli.getOptionValue( CliManager.CONVERT ) ) );
}
catch ( IOException e )
{
showFatalError( "Cannot find properties file which describes the conversion.", e, true );
}
File oldRepositoryPath = new File( p.getProperty( SOURCE_REPO_PATH ) );
File newRepositoryPath = new File( p.getProperty( TARGET_REPO_PATH ) );
System.out.println( "Converting " + oldRepositoryPath + " to " + newRepositoryPath );
List blacklistedPatterns = null;
String s = p.getProperty( BLACKLISTED_PATTERNS );
if ( s != null )
{
blacklistedPatterns = Arrays.asList( StringUtils.split( s, "," ) );
}
try
{
archiva.convertLegacyRepository( oldRepositoryPath, newRepositoryPath, blacklistedPatterns, true );
}
catch ( RepositoryConversionException e )
{
showFatalError( "Error converting repository.", e, true );
}
catch ( DiscovererException e )
{
showFatalError( "Error discovery artifacts to convert.", e, true );
}
}
}
catch ( PlexusContainerException e )
{
showFatalError( "Cannot create Plexus container.", e, true );
}
catch ( ComponentLookupException e )
{
showError( "Cannot lookup application component.", e, true );
}
return 0;
}
private static int showFatalError( String message,
Exception e,
boolean show )
{
System.err.println( "FATAL ERROR: " + message );
if ( show )
{
System.err.println( "Error stacktrace:" );
e.printStackTrace();
}
else
{
System.err.println( "For more information, run with the -e flag" );
}
return 1;
}
private static void showError( String message,
Exception e,
boolean show )
{
System.err.println( message );
if ( show )
{
System.err.println( "Error stacktrace:" );
e.printStackTrace();
}
}
// Need to get the versions of the application in a general way, so that I need a way to get the
// specifics of the application so that I can do this in a general way.
private static void showVersion()
{
InputStream resourceAsStream;
try
{
Properties properties = new Properties();
resourceAsStream = Cli.class.getClassLoader().getResourceAsStream(
"META-INF/maven/org.apache.maven/maven-core/pom.properties" );
properties.load( resourceAsStream );
if ( properties.getProperty( "builtOn" ) != null )
{
System.out.println( "Maven version: " + properties.getProperty( "version", "unknown" ) + " built on " +
properties.getProperty( "builtOn" ) );
}
else
{
System.out.println( "Maven version: " + properties.getProperty( "version", "unknown" ) );
}
}
catch ( IOException e )
{
System.err.println( "Unable determine version from JAR file: " + e.getMessage() );
}
}
// ----------------------------------------------------------------------
// System properties handling
// ----------------------------------------------------------------------
private static Properties getExecutionProperties( CommandLine commandLine )
{
Properties executionProperties = new Properties();
// ----------------------------------------------------------------------
// Options that are set on the command line become system properties
// and therefore are set in the session properties. System properties
// are most dominant.
// ----------------------------------------------------------------------
if ( commandLine.hasOption( CliManager.SET_SYSTEM_PROPERTY ) )
{
String[] defStrs = commandLine.getOptionValues( CliManager.SET_SYSTEM_PROPERTY );
for ( int i = 0; i < defStrs.length; ++i )
{
setCliProperty( defStrs[i], executionProperties );
}
}
executionProperties.putAll( System.getProperties() );
return executionProperties;
}
private static void setCliProperty( String property,
Properties executionProperties )
{
String name;
String value;
int i = property.indexOf( "=" );
if ( i <= 0 )
{
name = property.trim();
value = "true";
}
else
{
name = property.substring( 0, i ).trim();
value = property.substring( i + 1 ).trim();
}
executionProperties.setProperty( name, value );
// ----------------------------------------------------------------------
// I'm leaving the setting of system properties here as not to break
// the SystemPropertyProfileActivator. This won't harm embedding. jvz.
// ----------------------------------------------------------------------
System.setProperty( name, value );
}
} }

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package org.apache.maven.archiva.cli;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.ParseException;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import java.util.List;
import java.util.ArrayList;
/**
* @author Jason van Zyl
* @version $Revision: 381114 $
*/
public class CliManager
{
public static char CONVERT = 'c';
// ----------------------------------------------------------------------------
// These are standard options that we would want to use for all our projects.
// ----------------------------------------------------------------------------
public static final char QUIET = 'q';
public static final char DEBUG = 'X';
public static final char ERRORS = 'e';
public static final char HELP = 'h';
public static final char VERSION = 'v';
public static final char SET_SYSTEM_PROPERTY = 'D';
private Options options;
public CliManager()
{
options = new Options();
options.addOption(
OptionBuilder.withLongOpt( "convert" ).hasArg().withDescription(
"Convert a legacy Maven 1.x repository to a Maven 2.x repository using a properties file to describe the conversion." )
.create( CONVERT ) );
}
public CommandLine parse( String[] args )
throws ParseException
{
// We need to eat any quotes surrounding arguments...
String[] cleanArgs = cleanArgs( args );
CommandLineParser parser = new GnuParser();
return parser.parse( options, cleanArgs );
}
private String[] cleanArgs( String[] args )
{
List cleaned = new ArrayList();
StringBuffer currentArg = null;
for ( int i = 0; i < args.length; i++ )
{
String arg = args[i];
boolean addedToBuffer = false;
if ( arg.startsWith( "\"" ) )
{
// if we're in the process of building up another arg, push it and start over.
// this is for the case: "-Dfoo=bar "-Dfoo2=bar two" (note the first unterminated quote)
if ( currentArg != null )
{
cleaned.add( currentArg.toString() );
}
// start building an argument here.
currentArg = new StringBuffer( arg.substring( 1 ) );
addedToBuffer = true;
}
// this has to be a separate "if" statement, to capture the case of: "-Dfoo=bar"
if ( arg.endsWith( "\"" ) )
{
String cleanArgPart = arg.substring( 0, arg.length() - 1 );
// if we're building an argument, keep doing so.
if ( currentArg != null )
{
// if this is the case of "-Dfoo=bar", then we need to adjust the buffer.
if ( addedToBuffer )
{
currentArg.setLength( currentArg.length() - 1 );
}
// otherwise, we trim the trailing " and append to the buffer.
else
{
// TODO: introducing a space here...not sure what else to do but collapse whitespace
currentArg.append( ' ' ).append( cleanArgPart );
}
// we're done with this argument, so add it.
cleaned.add( currentArg.toString() );
}
else
{
// this is a simple argument...just add it.
cleaned.add( cleanArgPart );
}
// the currentArg MUST be finished when this completes.
currentArg = null;
continue;
}
// if we haven't added this arg to the buffer, and we ARE building an argument
// buffer, then append it with a preceding space...again, not sure what else to
// do other than collapse whitespace.
// NOTE: The case of a trailing quote is handled by nullifying the arg buffer.
if ( !addedToBuffer )
{
// append to the argument we're building, collapsing whitespace to a single space.
if ( currentArg != null )
{
currentArg.append( ' ' ).append( arg );
}
// this is a loner, just add it directly.
else
{
cleaned.add( arg );
}
}
}
// clean up.
if ( currentArg != null )
{
cleaned.add( currentArg.toString() );
}
int cleanedSz = cleaned.size();
String[] cleanArgs = null;
if ( cleanedSz == 0 )
{
// if we didn't have any arguments to clean, simply pass the original array through
cleanArgs = args;
}
else
{
cleanArgs = (String[]) cleaned.toArray( new String[cleanedSz] );
}
return cleanArgs;
}
public void displayHelp()
{
System.out.println();
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp( "mvn [options] [<goal(s)>] [<phase(s)>]", "\nOptions:", options, "\n" );
}
}