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Maven Plugin for Android Development
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/*
* Copyright (C) 2009 Jayway AB
* Copyright (C) 2007-2008 JVending Masa
*
* 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.
*/
package com.simpligility.maven.plugins.android;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.maven.plugin.logging.Log;
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 org.codehaus.plexus.util.cli.shell.Shell;
/**
*
*/
public interface CommandExecutor
{
/**
* Sets the plexus logger.
*
* @param logger
* the plexus logger
*/
void setLogger( Log logger );
/**
* Executes the command for the specified executable and list of command options.
*
* @param executable
* the name of the executable (csc, xsd, etc).
* @param commands
* the command options for the compiler/executable
* @throws ExecutionException
* if compiler or executable writes anything to the standard error stream or if the process returns a
* process result != 0.
*/
void executeCommand( String executable, List< String > commands ) throws ExecutionException;
/**
* Executes the command for the specified executable and list of command options.
*
* @param executable
* the name of the executable (csc, xsd, etc).
* @param commands
* the commands options for the compiler/executable
* @param failsOnErrorOutput
* if true, throws an ExecutionException if there the compiler or executable writes anything
* to the error output stream. By default, this value is true
* @throws ExecutionException
* if compiler or executable writes anything to the standard error stream (provided the
* failsOnErrorOutput is not false) or if the process returns a process result != 0.
*/
void executeCommand( String executable, List< String > commands, boolean failsOnErrorOutput )
throws ExecutionException;
/**
* Executes the command for the specified executable and list of command options. If the compiler or executable is
* not within the environmental path, you should use this method to specify the working directory. Always use this
* method for executables located within the local maven repository.
*
* @param executable
* the name of the executable (csc, xsd, etc).
* @param commands
* the command options for the compiler/executable
* @param workingDirectory
* the directory where the command will be executed
* @throws ExecutionException
* if compiler or executable writes anything to the standard error stream (provided the
* failsOnErrorOutput is not false) or if the process returns a process result != 0.
*/
void executeCommand( String executable, List< String > commands, File workingDirectory, boolean failsOnErrorOutput )
throws ExecutionException;
/**
* Returns the process result of executing the command. Typically a value of 0 means that the process executed
* successfully.
*
* @return the process result of executing the command
*/
int getResult();
/**
* @return the process id for the executed command.
*/
long getPid();
/**
* Returns the standard output from executing the command.
*
* @return the standard output from executing the command
*/
String getStandardOut();
/**
* Returns the standard error from executing the command.
*
* @return the standard error from executing the command
*/
String getStandardError();
/**
* Adds an environment variable with the specified name and value to the executor.
*/
void addEnvironment( String name, String value );
void setErrorListener( ErrorListener errorListener );
void setCustomShell( Shell s );
void setCaptureStdOut( boolean captureStdOut );
void setCaptureStdErr( boolean captureStdErr );
/**
*
*/
public interface ErrorListener
{
boolean isError( String error );
}
/**
* Provides factory services for creating a default instance of the command executor.
*/
class Factory
{
/**
* Constructor
*/
private Factory()
{
}
private static final class DefaultCommandExecutor implements CommandExecutor
{
private Map< String, String > environment;
/**
* Instance of a plugin logger.
*/
private Log logger;
/**
* Standard Out
*/
private StreamConsumer stdOut;
/**
* Standard Error
*/
private ErrorStreamConsumer stdErr;
/**
* Process result
*/
private int result;
/*
*/
private ErrorListener errorListener;
long pid;
private Commandline commandline;
private Shell customShell;
private boolean captureStdOut;
private boolean captureStdErr;
@Override
public void setLogger( Log logger )
{
this.logger = logger;
}
@Override
public void executeCommand( String executable, List< String > commands ) throws ExecutionException
{
executeCommand( executable, commands, null, true );
}
@Override
public void executeCommand( String executable, List< String > commands, boolean failsOnErrorOutput )
throws ExecutionException
{
executeCommand( executable, commands, null, failsOnErrorOutput );
}
@Override
public void executeCommand( String executable, List< String > commands, File workingDirectory,
boolean failsOnErrorOutput ) throws ExecutionException
{
if ( commands == null )
{
commands = new ArrayList< String >();
}
stdOut = new StreamConsumerImpl( logger, captureStdOut );
stdErr = new ErrorStreamConsumer( logger, errorListener, captureStdErr );
commandline = new Commandline();
if ( customShell != null )
{
commandline.setShell( customShell );
}
commandline.setExecutable( executable );
// Add the environment variables as needed
if ( environment != null )
{
for ( Map.Entry< String, String > entry : environment.entrySet() )
{
commandline.addEnvironment( entry.getKey(), entry.getValue() );
}
}
commandline.addArguments( commands.toArray( new String[ commands.size() ] ) );
if ( workingDirectory != null && workingDirectory.exists() )
{
commandline.setWorkingDirectory( workingDirectory.getAbsolutePath() );
}
try
{
logger.debug( "ANDROID-040-000: Executing command: Commandline = " + commandline );
result = CommandLineUtils.executeCommandLine( commandline, stdOut, stdErr );
if ( logger != null )
{
logger.debug( "ANDROID-040-000: Executed command: Commandline = " + commandline + ", Result = "
+ result );
}
else
{
System.out.println( "ANDROID-040-000: Executed command: Commandline = " + commandline
+ ", Result = " + result );
}
if ( failsOnErrorOutput && stdErr.hasError() || result != 0 )
{
throw new ExecutionException( "ANDROID-040-001: Could not execute: Command = "
+ commandline.toString() + ", Result = " + result );
}
}
catch ( CommandLineException e )
{
throw new ExecutionException( "ANDROID-040-002: Could not execute: Command = "
+ commandline.toString() + ", Error message = " + e.getMessage() );
}
setPid( commandline.getPid() );
}
@Override
public int getResult()
{
return result;
}
@Override
public String getStandardOut()
{
if ( ! captureStdOut )
{
throw new IllegalStateException( "Unable to provide StdOut since it was not captured" );
}
return stdOut.toString();
}
@Override
public String getStandardError()
{
if ( ! captureStdErr )
{
throw new IllegalStateException( "Unable to provide StdOut since it was not captured" );
}
return stdErr.toString();
}
@Override
public void addEnvironment( String name, String value )
{
if ( environment == null )
{
environment = new HashMap< String, String >();
}
environment.put( name, value );
}
@Override
public void setErrorListener( ErrorListener errorListener )
{
this.errorListener = errorListener;
}
public void setPid( long pid )
{
this.pid = pid;
}
@Override
public long getPid()
{
return pid;
}
@Override
public void setCustomShell( Shell shell )
{
this.customShell = shell;
}
@Override
public void setCaptureStdOut( boolean captureStdOut )
{
this.captureStdOut = captureStdOut;
}
@Override
public void setCaptureStdErr( boolean captureStdErr )
{
this.captureStdErr = captureStdErr;
}
}
/**
* StreamConsumer instance that buffers the entire output
*/
static class StreamConsumerImpl implements StreamConsumer
{
private StringBuffer sb = new StringBuffer();
private final Log logger;
private boolean captureStdOut;
StreamConsumerImpl( Log logger, boolean captureStdOut )
{
this.logger = logger;
this.captureStdOut = captureStdOut;
}
@Override
public void consumeLine( String line )
{
if ( captureStdOut )
{
sb.append( line ).append( '\n' );
}
if ( logger != null )
{
logger.debug( line );
}
}
/**
* Returns the stream
*
* @return the stream
*/
@Override
public String toString()
{
return sb.toString();
}
}
/**
* Provides behavior for determining whether the command utility wrote anything to the Standard Error Stream.
* NOTE: I am using this to decide whether to fail the NMaven build. If the compiler implementation chooses to
* write warnings to the error stream, then the build will fail on warnings!!!
*/
static class ErrorStreamConsumer implements StreamConsumer
{
/** Is true if there was anything consumed from the stream, otherwise false */
private boolean error;
/** Buffer to store the stream */
private StringBuffer sbe = new StringBuffer();
private final Log logger;
private final ErrorListener errorListener;
private boolean captureStdErr;
ErrorStreamConsumer( Log logger, ErrorListener errorListener, boolean captureStdErr )
{
this.logger = logger;
this.errorListener = errorListener;
this.captureStdErr = captureStdErr;
if ( logger == null )
{
System.out.println( "ANDROID-040-003: Error Log not set: Will not output error logs" );
}
error = false;
}
@Override
public void consumeLine( String line )
{
if ( captureStdErr )
{
sbe.append( line );
}
if ( logger != null )
{
logger.info( line );
}
if ( errorListener != null )
{
error = errorListener.isError( line );
}
else
{
error = true;
}
}
/**
* Returns false if the command utility wrote to the Standard Error Stream, otherwise returns true.
*
* @return false if the command utility wrote to the Standard Error Stream, otherwise returns true.
*/
public boolean hasError()
{
return error;
}
/**
* Returns the error stream
*
* @return error stream
*/
@Override
public String toString()
{
return sbe.toString();
}
}
/**
* Returns a default instance of the command executor
*
* @return a default instance of the command executor
*/
public static CommandExecutor createDefaultCommmandExecutor()
{
return new DefaultCommandExecutor();
}
}
}