/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.tools.ant.taskdefs;
import java.io.File;
import java.io.IOException;
import java.util.Vector;
import java.util.Enumeration;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.types.DirSet;
import org.apache.tools.ant.types.FileSet;
import org.apache.tools.ant.types.FileList;
import org.apache.tools.ant.types.PropertySet;
import org.apache.tools.ant.types.Reference;
import org.apache.tools.ant.types.ResourceCollection;
import org.apache.tools.ant.taskdefs.Ant.TargetElement;
/**
* Calls a given target for all defined sub-builds. This is an extension
* of ant for bulk project execution.
* <p>
* <h2> Use with directories </h2>
* <p>
* subant can be used with directory sets to execute a build from different directories.
* 2 different options are offered
* </p>
* <ul>
* <li>
* run the same build file /somepath/otherpath/mybuild.xml
* with different base directories use the genericantfile attribute
* </li>
* <li>if you want to run directory1/build.xml, directory2/build.xml, ....
* use the antfile attribute. The base directory does not get set by the subant task in this case,
* because you can specify it in each build file.
* </li>
* </ul>
* @since Ant1.6
* @ant.task name="subant" category="control"
*/
public class SubAnt
extends Task {
private Path buildpath;
private Ant ant = null;
private String subTarget = null;
private String antfile = "build.xml";
private File genericantfile = null;
private boolean verbose = false;
private boolean inheritAll = false;
private boolean inheritRefs = false;
private boolean failOnError = true;
private String output = null;
private Vector properties = new Vector();
private Vector references = new Vector();
private Vector propertySets = new Vector();
/** the targets to call on the new project */
private Vector/*<TargetElement>*/ targets = new Vector();
/**
* Pass output sent to System.out to the new project.
*
* @param output a line of output
* @since Ant 1.6.2
*/
public void handleOutput(String output) {
if (ant != null) {
ant.handleOutput(output);
} else {
super.handleOutput(output);
}
}
/**
* Process input into the ant task
*
* @param buffer the buffer into which data is to be read.
* @param offset the offset into the buffer at which data is stored.
* @param length the amount of data to read
*
* @return the number of bytes read
*
* @exception IOException if the data cannot be read
*
* @see Task#handleInput(byte[], int, int)
*
* @since Ant 1.6.2
*/
public int handleInput(byte[] buffer, int offset, int length)
throws IOException {
if (ant != null) {
return ant.handleInput(buffer, offset, length);
} else {
return super.handleInput(buffer, offset, length);
}
}
/**
* Pass output sent to System.out to the new project.
*
* @param output The output to log. Should not be <code>null</code>.
*
* @since Ant 1.6.2
*/
public void handleFlush(String output) {
if (ant != null) {
ant.handleFlush(output);
} else {
super.handleFlush(output);
}
}
/**
* Pass output sent to System.err to the new project.
*
* @param output The error output to log. Should not be <code>null</code>.
*
* @since Ant 1.6.2
*/
public void handleErrorOutput(String output) {
if (ant != null) {
ant.handleErrorOutput(output);
} else {
super.handleErrorOutput(output);
}
}
/**
* Pass output sent to System.err to the new project.
*
* @param output The error output to log. Should not be <code>null</code>.
*
* @since Ant 1.6.2
*/
public void handleErrorFlush(String output) {
if (ant != null) {
ant.handleErrorFlush(output);
} else {
super.handleErrorFlush(output);
}
}
/**
* Runs the various sub-builds.
*/
public void execute() {
if (buildpath == null) {
throw new BuildException("No buildpath specified");
}
final String[] filenames = buildpath.list();
final int count = filenames.length;
if (count < 1) {
log("No sub-builds to iterate on", Project.MSG_WARN);
return;
}
/*
//REVISIT: there must be cleaner way of doing this, if it is merited at all
if (subTarget == null) {
subTarget = getOwningTarget().getName();
}
*/
BuildException buildException = null;
for (int i = 0; i < count; ++i) {
File file = null;
String subdirPath = null;
Throwable thrownException = null;
try {
File directory = null;
file = new File(filenames[i]);
if (file.isDirectory()) {
if (verbose) {
subdirPath = file.getPath();
log("Entering directory: " + subdirPath + "\n", Project.MSG_INFO);
}
if (genericantfile != null) {
directory = file;
file = genericantfile;
} else {
file = new File(file, antfile);
}
}
execute(file, directory);
if (verbose && subdirPath != null) {
log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
}
} catch (RuntimeException ex) {
if (!(getProject().isKeepGoingMode())) {
if (verbose && subdirPath != null) {
log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
}
throw ex; // throw further
}
thrownException = ex;
} catch (Throwable ex) {
if (!(getProject().isKeepGoingMode())) {
if (verbose && subdirPath != null) {
log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
}
throw new BuildException(ex);
}
thrownException = ex;
}
if (thrownException != null) {
if (thrownException instanceof BuildException) {
log("File '" + file
+ "' failed with message '"
+ thrownException.getMessage() + "'.", Project.MSG_ERR);
// only the first build exception is reported
if (buildException == null) {
buildException = (BuildException) thrownException;
}
} else {
log("Target '" + file
+ "' failed with message '"
+ thrownException.getMessage() + "'.", Project.MSG_ERR);
thrownException.printStackTrace(System.err);
if (buildException == null) {
buildException =
new BuildException(thrownException);
}
}
if (verbose && subdirPath != null) {
log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
}
}
}
// check if one of the builds failed in keep going mode
if (buildException != null) {
throw buildException;
}
}
/**
* Runs the given target on the provided build file.
*
* @param file the build file to execute
* @param directory the directory of the current iteration
* @throws BuildException is the file cannot be found, read, is
* a directory, or the target called failed, but only if
* <code>failOnError</code> is <code>true</code>. Otherwise,
* a warning log message is simply output.
*/
private void execute(File file, File directory)
throws BuildException {
if (!file.exists() || file.isDirectory() || !file.canRead()) {
String msg = "Invalid file: " + file;
if (failOnError) {
throw new BuildException(msg);
}
log(msg, Project.MSG_WARN);
return;
}
ant = createAntTask(directory);
String antfilename = file.getAbsolutePath();
ant.setAntfile(antfilename);
for (int i = 0; i < targets.size(); i++) {
TargetElement targetElement = (TargetElement) targets.get(i);
ant.addConfiguredTarget(targetElement);
}
try {
ant.execute();
} catch (BuildException e) {
if (failOnError) {
throw e;
}
log("Failure for target '" + subTarget
+ "' of: " + antfilename + "\n"
+ e.getMessage(), Project.MSG_WARN);
} catch (Throwable e) {
if (failOnError) {
throw new BuildException(e);
}
log("Failure for target '" + subTarget
+ "' of: " + antfilename + "\n"
+ e.toString(),
Project.MSG_WARN);
} finally {
ant = null;
}
}
/**
* This method builds the file name to use in conjunction with directories.
*
* <p>Defaults to "build.xml".
* If <code>genericantfile</code> is set, this attribute is ignored.</p>
*
* @param antfile the short build file name. Defaults to "build.xml".
*/
public void setAntfile(String antfile) {
this.antfile = antfile;
}
/**
* This method builds a file path to use in conjunction with directories.
*
* <p>Use <code>genericantfile</code>, in order to run the same build file
* with different basedirs.</p>
* If this attribute is set, <code>antfile</code> is ignored.
*
* @param afile (path of the generic ant file, absolute or relative to
* project base directory)
* */
public void setGenericAntfile(File afile) {
this.genericantfile = afile;
}
/**
* Sets whether to fail with a build exception on error, or go on.
*
* @param failOnError the new value for this boolean flag.
*/
public void setFailonerror(boolean failOnError) {
this.failOnError = failOnError;
}
/**
* The target to call on the different sub-builds. Set to "" to execute
* the default target.
* @param target the target
* <p>
*/
// REVISIT: Defaults to the target name that contains this task if not specified.
public void setTarget(String target) {
this.subTarget = target;
}
/**
* Add a target to this Ant invocation.
* @param t the <code>TargetElement</code> to add.
* @since Ant 1.7
*/
public void addConfiguredTarget(TargetElement t) {
String name = t.getName();
if ("".equals(name)) {
throw new BuildException("target name must not be empty");
}
targets.add(t);
}
/**
* Enable/ disable verbose log messages showing when each sub-build path is entered/ exited.
* The default value is "false".
* @param on true to enable verbose mode, false otherwise (default).
*/
public void setVerbose(boolean on) {
this.verbose = on;
}
/**
* Corresponds to <code><ant></code>'s
* <code>output</code> attribute.
*
* @param s the filename to write the output to.
*/
public void setOutput(String s) {
this.output = s;
}
/**
* Corresponds to <code><ant></code>'s
* <code>inheritall</code> attribute.
*
* @param b the new value for this boolean flag.
*/
public void setInheritall(boolean b) {
this.inheritAll = b;
}
/**
* Corresponds to <code><ant></code>'s
* <code>inheritrefs</code> attribute.
*
* @param b the new value for this boolean flag.
*/
public void setInheritrefs(boolean b) {
this.inheritRefs = b;
}
/**
* Corresponds to <code><ant></code>'s
* nested <code><property></code> element.
*
* @param p the property to pass on explicitly to the sub-build.
*/
public void addProperty(Property p) {
properties.addElement(p);
}
/**
* Corresponds to <code><ant></code>'s
* nested <code><reference></code> element.
*
* @param r the reference to pass on explicitly to the sub-build.
*/
public void addReference(Ant.Reference r) {
references.addElement(r);
}
/**
* Corresponds to <code><ant></code>'s
* nested <code><propertyset></code> element.
* @param ps the propertset
*/
public void addPropertyset(PropertySet ps) {
propertySets.addElement(ps);
}
/**
* Adds a directory set to the implicit build path.
* <p>
* <em>Note that the directories will be added to the build path
* in no particular order, so if order is significant, one should
* use a file list instead!</em>
*
* @param set the directory set to add.
*/
public void addDirset(DirSet set) {
add(set);
}
/**
* Adds a file set to the implicit build path.
* <p>
* <em>Note that the directories will be added to the build path
* in no particular order, so if order is significant, one should
* use a file list instead!</em>
*
* @param set the file set to add.
*/
public void addFileset(FileSet set) {
add(set);
}
/**
* Adds an ordered file list to the implicit build path.
* <p>
* <em>Note that contrary to file and directory sets, file lists
* can reference non-existent files or directories!</em>
*
* @param list the file list to add.
*/
public void addFilelist(FileList list) {
add(list);
}
/**
* Adds a resource collection to the implicit build path.
*
* @param rc the resource collection to add.
* @since Ant 1.7
*/
public void add(ResourceCollection rc) {
getBuildpath().add(rc);
}
/**
* Set the buildpath to be used to find sub-projects.
*
* @param s an Ant Path object containing the buildpath.
*/
public void setBuildpath(Path s) {
getBuildpath().append(s);
}
/**
* Creates a nested build path, and add it to the implicit build path.
*
* @return the newly created nested build path.
*/
public Path createBuildpath() {
return getBuildpath().createPath();
}
/**
* Creates a nested <code><buildpathelement></code>,
* and add it to the implicit build path.
*
* @return the newly created nested build path element.
*/
public Path.PathElement createBuildpathElement() {
return getBuildpath().createPathElement();
}
/**
* Gets the implicit build path, creating it if <code>null</code>.
*
* @return the implicit build path.
*/
private Path getBuildpath() {
if (buildpath == null) {
buildpath = new Path(getProject());
}
return buildpath;
}
/**
* Buildpath to use, by reference.
*
* @param r a reference to an Ant Path object containing the buildpath.
*/
public void setBuildpathRef(Reference r) {
createBuildpath().setRefid(r);
}
/**
* Creates the <ant> task configured to run a specific target.
*
* @param directory : if not null the directory where the build should run
*
* @return the ant task, configured with the explicit properties and
* references necessary to run the sub-build.
*/
private Ant createAntTask(File directory) {
Ant antTask = new Ant(this);
antTask.init();
if (subTarget != null && subTarget.length() > 0) {
antTask.setTarget(subTarget);
}
if (output != null) {
antTask.setOutput(output);
}
if (directory != null) {
antTask.setDir(directory);
}
antTask.setInheritAll(inheritAll);
for (Enumeration i = properties.elements(); i.hasMoreElements();) {
copyProperty(antTask.createProperty(), (Property) i.nextElement());
}
for (Enumeration i = propertySets.elements(); i.hasMoreElements();) {
antTask.addPropertyset((PropertySet) i.nextElement());
}
antTask.setInheritRefs(inheritRefs);
for (Enumeration i = references.elements(); i.hasMoreElements();) {
antTask.addReference((Ant.Reference) i.nextElement());
}
return antTask;
}
/**
* Assigns an Ant property to another.
*
* @param to the destination property whose content is modified.
* @param from the source property whose content is copied.
*/
private static void copyProperty(Property to, Property from) {
to.setName(from.getName());
if (from.getValue() != null) {
to.setValue(from.getValue());
}
if (from.getFile() != null) {
to.setFile(from.getFile());
}
if (from.getResource() != null) {
to.setResource(from.getResource());
}
if (from.getPrefix() != null) {
to.setPrefix(from.getPrefix());
}
if (from.getRefid() != null) {
to.setRefid(from.getRefid());
}
if (from.getEnvironment() != null) {
to.setEnvironment(from.getEnvironment());
}
if (from.getClasspath() != null) {
to.setClasspath(from.getClasspath());
}
}
} // END class SubAnt
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