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package org.codehaus.mojo.exec;
/*
* Copyright 2005-2006 The Codehaus.
*
* 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.maven.artifact.Artifact;
import org.apache.maven.artifact.resolver.filter.AndArtifactFilter;
import org.apache.maven.artifact.resolver.filter.IncludesArtifactFilter;
import org.apache.maven.plugin.logging.Log;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.util.cli.CommandLineException;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.Commandline;
import org.codehaus.plexus.util.cli.StreamConsumer;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.HashMap;
import java.util.StringTokenizer;
/**
* A Plugin for executing external programs.
*
* @author Jerome Lacoste
* @version $Id: ExecMojo.java 6937 2008-05-10 08:35:36Z lacostej $
* @goal exec
* @requiresDependencyResolution test
* @since 1.0
*/
public class ExecMojo
extends AbstractExecMojo
{
/**
* Skip the execution.
*
* @parameter expression="${skip}" default-value="false"
* @since 1.0.1
*/
private boolean skip;
/**
* The executable. Can be a full path or a the name executable. In the latter case, the executable must be
* in the PATH for the execution to work.
*
* @parameter expression="${exec.executable}"
* @required
* @since 1.0
*/
private String executable;
/**
* The current working directory. Optional. If not specified, basedir will be used.
*
* @parameter expression="${exec.workingdir}
* @since 1.0
*/
private File workingDirectory;
/**
* Program standard and error output will be redirected to the file specified by this optional field.
* If not specified the standard maven logging is used.
*
* @parameter expression="${exec.outputFile}"
* @since 1.1-beta-2
*/
private File outputFile;
/**
* Can be of type <argument> or <classpath>
* Can be overriden using "exec.args" env. variable
*
* @parameter
* @since 1.0
*/
private List arguments;
/**
* @parameter expression="${basedir}"
* @required
* @readonly
* @since 1.0
*/
private File basedir;
/**
* Environment variables to pass to the executed program.
* @parameter
* @since 1.1-beta-2
*/
private Map environmentVariables = new HashMap();
/**
* if exec.args expression is used when invokign the exec:exec goal,
* any occurence of %classpath argument is replaced by the actual project dependency classpath.
*/
public static final String CLASSPATH_TOKEN = "%classpath";
/**
* priority in the execute method will be to use System properties arguments over the pom specification.
* @throws MojoExecutionException if a failure happens
*/
public void execute()
throws MojoExecutionException
{
if ( skip )
{
getLog().info( "skipping execute as per configuraion" );
return;
}
if ( basedir == null )
{
throw new IllegalStateException( "basedir is null. Should not be possible." );
}
String argsProp = getSystemProperty( "exec.args" );
List commandArguments = new ArrayList();
if ( hasCommandlineArgs() )
{
String[] args = parseCommandlineArgs();
for ( int i = 0; i < args.length; i++ )
{
if ( CLASSPATH_TOKEN.equals( args[i] ) )
{
commandArguments.add( computeClasspath( null ) );
}
else
{
commandArguments.add( args[i] );
}
}
}
else if ( !isEmpty( argsProp ) )
{
getLog().debug( "got arguments from system properties: " + argsProp );
StringTokenizer strtok = new StringTokenizer( argsProp, " " );
while ( strtok.hasMoreTokens() )
{
commandArguments.add( strtok.nextToken() );
}
}
else
{
if ( arguments != null )
{
for ( int i = 0; i < arguments.size(); i++ )
{
Object argument = arguments.get( i );
String arg;
if ( argument == null )
{
throw new MojoExecutionException(
"Misconfigured argument, value is null. Set the argument to an empty value"
+ " if this is the required behaviour." );
}
else if ( argument instanceof Classpath )
{
Classpath specifiedClasspath = (Classpath) argument;
arg = computeClasspath( specifiedClasspath );
}
else
{
arg = argument.toString();
}
commandArguments.add( arg );
}
}
}
Commandline commandLine = new Commandline();
commandLine.setExecutable( getExecutablePath() );
String [] args = new String[ commandArguments.size() ];
for ( int i = 0; i < commandArguments.size(); i++ )
{
args[i] = (String) commandArguments.get( i );
}
commandLine.addArguments( args );
if ( workingDirectory == null )
{
workingDirectory = basedir;
}
if ( !workingDirectory.exists() )
{
getLog().debug( "Making working directory '" + workingDirectory.getAbsolutePath() + "'." );
if ( !workingDirectory.mkdirs() )
{
throw new MojoExecutionException(
"Could not make working directory: '" + workingDirectory.getAbsolutePath() + "'" );
}
}
commandLine.setWorkingDirectory( workingDirectory.getAbsolutePath() );
if ( environmentVariables != null )
{
Iterator iter = environmentVariables.keySet().iterator();
while ( iter.hasNext() )
{
String key = (String) iter.next();
String value = (String) environmentVariables.get( key );
commandLine.addEnvironment( key, value );
}
}
final Log outputLog = getExecOutputLog();
StreamConsumer stdout = new StreamConsumer()
{
public void consumeLine( String line )
{
outputLog.info( line );
}
};
StreamConsumer stderr = new StreamConsumer()
{
public void consumeLine( String line )
{
outputLog.info( line );
}
};
try
{
int result = executeCommandLine( commandLine, stdout, stderr );
if ( result != 0 )
{
throw new MojoExecutionException( "Result of " + commandLine + " execution is: '" + result + "'." );
}
}
catch ( CommandLineException e )
{
throw new MojoExecutionException( "Command execution failed.", e );
}
registerSourceRoots();
}
private Log getExecOutputLog()
{
Log log = getLog();
if ( outputFile != null )
{
try
{
if ( !outputFile.getParentFile().exists() && !outputFile.getParentFile().mkdirs() )
{
getLog().warn( "Could not create non existing parent directories for log file: " + outputFile );
}
PrintStream stream = new PrintStream( new FileOutputStream( outputFile ) );
log = new StreamLog( stream );
}
catch ( Exception e )
{
getLog().warn( "Could not open " + outputFile + ". Using default log", e );
}
}
return log;
}
/**
* Compute the classpath from the specified Classpath. The computed classpath is based on the classpathScope.
* The plugin cannot know from maven the phase it is executed in. So we have to depend on the user to tell us
* he wants the scope in which the plugin is expected to be executed.
* @param specifiedClasspath Non null when the user restricted the dependenceis, null otherwise
(the default classpath will be used)
* @return a platform specific String representation of the classpath
*/
private String computeClasspath( Classpath specifiedClasspath )
{
// TODO we should consider rewriting this bit into something like
// List collectProjectClasspathAsListOfURLs( optionalFilter );
// reusable by both mojos
List artifacts = new ArrayList();
List theClasspathFiles = new ArrayList();
collectProjectArtifactsAndClasspath( artifacts, theClasspathFiles );
if ( specifiedClasspath != null && specifiedClasspath.getDependencies() != null )
{
artifacts = filterArtifacts( artifacts, specifiedClasspath.getDependencies() );
}
StringBuffer theClasspath = new StringBuffer();
for ( Iterator it = theClasspathFiles.iterator(); it.hasNext(); )
{
File f = (File) it.next();
addToClasspath( theClasspath, f.getAbsolutePath() );
}
for ( Iterator it = artifacts.iterator(); it.hasNext(); )
{
Artifact artifact = (Artifact) it.next();
getLog().debug( "dealing with " + artifact );
addToClasspath( theClasspath, artifact.getFile().getAbsolutePath() );
}
return theClasspath.toString();
}
private static void addToClasspath( StringBuffer theClasspath, String toAdd )
{
if ( theClasspath.length() > 0 )
{
theClasspath.append( File.pathSeparator );
}
theClasspath.append( toAdd );
}
private List filterArtifacts( List artifacts, Collection dependencies )
{
AndArtifactFilter filter = new AndArtifactFilter();
filter.add( new IncludesArtifactFilter( new ArrayList( dependencies ) ) ); // gosh
List filteredArtifacts = new ArrayList();
for ( Iterator it = artifacts.iterator(); it.hasNext(); )
{
Artifact artifact = (Artifact) it.next();
if ( filter.include( artifact ) )
{
getLog().debug( "filtering in " + artifact );
filteredArtifacts.add( artifact );
}
}
return filteredArtifacts;
}
String getExecutablePath()
{
File execFile = new File( executable );
// if the file doesn't exist, the exec is probably in the PATH...
// we should probably also test for isFile and canExecute, but the second one is only
// available in SDK 6.
if ( execFile.exists() )
{
return execFile.getAbsolutePath();
}
else
{
getLog().debug( "executable " + executable + " not found in place, assuming it is in the PATH." );
return executable;
}
}
private static boolean isEmpty( String string )
{
return string == null || string.length() == 0;
}
//
// methods used for tests purposes - allow mocking and simulate automatic setters
//
protected int executeCommandLine( Commandline commandLine, StreamConsumer stream1, StreamConsumer stream2 )
throws CommandLineException
{
return CommandLineUtils.executeCommandLine( commandLine, stream1, stream2 );
}
void setExecutable( String executable )
{
this.executable = executable;
}
String getExecutable()
{
return executable;
}
void setWorkingDirectory( String workingDir )
{
setWorkingDirectory( new File( workingDir ) );
}
void setWorkingDirectory( File workingDir )
{
this.workingDirectory = workingDir;
}
void setArguments( List arguments )
{
this.arguments = arguments;
}
void setBasedir( File basedir )
{
this.basedir = basedir;
}
void setProject( MavenProject project )
{
this.project = project;
}
protected String getSystemProperty( String key )
{
return System.getProperty( key );
}
}
