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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.gradle
import org.apache.tools.ant.BuildException
import org.apache.tools.ant.BuildListener
import org.apache.tools.ant.BuildLogger
import org.apache.tools.ant.DefaultLogger
import org.apache.tools.ant.Project
import org.gradle.api.DefaultTask
import org.gradle.api.GradleException
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.Optional
import org.gradle.api.tasks.TaskAction
import java.nio.charset.Charset
/**
* A task which will run ant commands.
*
* Logging for the task is customizable for subclasses by overriding makeLogger.
*/
public class AntTask extends DefaultTask {
/**
* A buffer that will contain the output of the ant code run,
* if the output was not already written directly to stdout.
*/
public final ByteArrayOutputStream outputBuffer = new ByteArrayOutputStream()
@TaskAction
final void executeTask() {
AntBuilder ant = new AntBuilder()
// remove existing loggers, we add our own
List<BuildLogger> toRemove = new ArrayList<>();
for (BuildListener listener : ant.project.getBuildListeners()) {
if (l instanceof BuildLogger) {
toRemove.add(listener);
}
}
for (BuildLogger listener : toRemove) {
ant.project.removeBuildListener(listener)
}
final int outputLevel = logger.isDebugEnabled() ? Project.MSG_DEBUG : (logger.isInfoEnabled() ? Project.MSG_INFO : Project.MSG_WARN)
final PrintStream stream = useStdout() ? System.out : new PrintStream(outputBuffer, true, Charset.defaultCharset().name())
BuildLogger antLogger = makeLogger(stream, outputLevel)
ant.project.addBuildListener(antLogger)
try {
runAnt(ant)
} catch (BuildException e) {
// ant failed, so see if we have buffered output to emit, then rethrow the failure
String buffer = outputBuffer.toString()
if (buffer.isEmpty() == false) {
logger.error("=== Ant output ===\n${buffer}")
}
throw e
}
}
/** Runs the doAnt closure. This can be overridden by subclasses instead of having to set a closure. */
protected void runAnt(AntBuilder ant) {
if (doAnt == null) {
throw new GradleException("Missing doAnt for ${name}")
}
doAnt(ant)
}
/** Create the logger the ant runner will use, with the given stream for error/output. */
protected BuildLogger makeLogger(PrintStream stream, int outputLevel) {
return new DefaultLogger(
errorPrintStream: stream,
outputPrintStream: stream,
messageOutputLevel: outputLevel)
}
/**
* Returns true if the ant logger should write to stdout, or false if to the buffer.
* The default implementation writes to the buffer when gradle info logging is disabled.
*/
protected boolean useStdout() {
return logger.isInfoEnabled()
}
}
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