/*
* 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.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.lang.reflect.Method;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Vector;
import java.util.Set;
import java.util.HashSet;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.BuildListener;
import org.apache.tools.ant.DefaultLogger;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.ProjectComponent;
import org.apache.tools.ant.ProjectHelper;
import org.apache.tools.ant.Target;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.MagicNames;
import org.apache.tools.ant.Main;
import org.apache.tools.ant.types.PropertySet;
import org.apache.tools.ant.util.FileUtils;
/**
* Build a sub-project.
*
* <pre>
* <target name="foo" depends="init">
* <ant antfile="build.xml" target="bar" >
* <property name="property1" value="aaaaa" />
* <property name="foo" value="baz" />
* </ant></span>
* </target></span>
*
* <target name="bar" depends="init">
* <echo message="prop is ${property1} ${foo}" />
* </target>
* </pre>
*
*
* @since Ant 1.1
*
* @ant.task category="control"
*/
public class Ant extends Task {
private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
/** the basedir where is executed the build file */
private File dir = null;
/**
* the build.xml file (can be absolute) in this case dir will be
* ignored
*/
private String antFile = null;
/** the output */
private String output = null;
/** should we inherit properties from the parent ? */
private boolean inheritAll = true;
/** should we inherit references from the parent ? */
private boolean inheritRefs = false;
/** the properties to pass to the new project */
private Vector properties = new Vector();
/** the references to pass to the new project */
private Vector references = new Vector();
/** the temporary project created to run the build file */
private Project newProject;
/** The stream to which output is to be written. */
private PrintStream out = null;
/** the sets of properties to pass to the new project */
private Vector propertySets = new Vector();
/** the targets to call on the new project */
private Vector targets = new Vector();
/** whether the target attribute was specified **/
private boolean targetAttributeSet = false;
/**
* simple constructor
*/
public Ant() {
//default
}
/**
* create a task bound to its creator
* @param owner owning task
*/
public Ant(Task owner) {
bindToOwner(owner);
}
/**
* If true, pass all properties to the new Ant project.
* Defaults to true.
* @param value if true pass all properties to the new Ant project.
*/
public void setInheritAll(boolean value) {
inheritAll = value;
}
/**
* If true, pass all references to the new Ant project.
* Defaults to false.
* @param value if true, pass all references to the new Ant project
*/
public void setInheritRefs(boolean value) {
inheritRefs = value;
}
/**
* Creates a Project instance for the project to call.
*/
public void init() {
newProject = getProject().createSubProject();
newProject.setJavaVersionProperty();
}
/**
* Called in execute or createProperty (via getNewProject())
* if newProject is null.
*
* <p>This can happen if the same instance of this task is run
* twice as newProject is set to null at the end of execute (to
* save memory and help the GC).</p>
* <p>calls init() again</p>
*
*/
private void reinit() {
init();
}
/**
* Attaches the build listeners of the current project to the new
* project, configures a possible logfile, transfers task and
* data-type definitions, transfers properties (either all or just
* the ones specified as user properties to the current project,
* depending on inheritall), transfers the input handler.
*/
private void initializeProject() {
newProject.setInputHandler(getProject().getInputHandler());
Iterator iter = getBuildListeners();
while (iter.hasNext()) {
newProject.addBuildListener((BuildListener) iter.next());
}
if (output != null) {
File outfile = null;
if (dir != null) {
outfile = FILE_UTILS.resolveFile(dir, output);
} else {
outfile = getProject().resolveFile(output);
}
try {
out = new PrintStream(new FileOutputStream(outfile));
DefaultLogger logger = new DefaultLogger();
logger.setMessageOutputLevel(Project.MSG_INFO);
logger.setOutputPrintStream(out);
logger.setErrorPrintStream(out);
newProject.addBuildListener(logger);
} catch (IOException ex) {
log("Ant: Can't set output to " + output);
}
}
// set user-defined properties
getProject().copyUserProperties(newProject);
if (!inheritAll) {
// set Java built-in properties separately,
// b/c we won't inherit them.
newProject.setSystemProperties();
} else {
// set all properties from calling project
addAlmostAll(getProject().getProperties());
}
Enumeration e = propertySets.elements();
while (e.hasMoreElements()) {
PropertySet ps = (PropertySet) e.nextElement();
addAlmostAll(ps.getProperties());
}
}
/**
* Handles output.
* Send it the the new project if is present, otherwise
* call the super class.
* @param outputToHandle The string output to output.
* @see Task#handleOutput(String)
* @since Ant 1.5
*/
public void handleOutput(String outputToHandle) {
if (newProject != null) {
newProject.demuxOutput(outputToHandle, false);
} else {
super.handleOutput(outputToHandle);
}
}
/**
* Handles input.
* Deleate to the created project, if present, otherwise
* call the super class.
* @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
*/
public int handleInput(byte[] buffer, int offset, int length)
throws IOException {
if (newProject != null) {
return newProject.demuxInput(buffer, offset, length);
}
return super.handleInput(buffer, offset, length);
}
/**
* Handles output.
* Send it the the new project if is present, otherwise
* call the super class.
* @param toFlush The string to output.
* @see Task#handleFlush(String)
* @since Ant 1.5.2
*/
public void handleFlush(String toFlush) {
if (newProject != null) {
newProject.demuxFlush(toFlush, false);
} else {
super.handleFlush(toFlush);
}
}
/**
* Handle error output.
* Send it the the new project if is present, otherwise
* call the super class.
* @param errorOutputToHandle The string to output.
*
* @see Task#handleErrorOutput(String)
* @since Ant 1.5
*/
public void handleErrorOutput(String errorOutputToHandle) {
if (newProject != null) {
newProject.demuxOutput(errorOutputToHandle, true);
} else {
super.handleErrorOutput(errorOutputToHandle);
}
}
/**
* Handle error output.
* Send it the the new project if is present, otherwise
* call the super class.
* @param errorOutputToFlush The string to output.
* @see Task#handleErrorFlush(String)
* @since Ant 1.5.2
*/
public void handleErrorFlush(String errorOutputToFlush) {
if (newProject != null) {
newProject.demuxFlush(errorOutputToFlush, true);
} else {
super.handleErrorFlush(errorOutputToFlush);
}
}
/**
* Do the execution.
* @throws BuildException if a target tries to call itself;
* probably also if a BuildException is thrown by the new project.
*/
public void execute() throws BuildException {
File savedDir = dir;
String savedAntFile = antFile;
Vector locals = new Vector(targets);
try {
getNewProject();
if (dir == null && inheritAll) {
dir = getProject().getBaseDir();
}
initializeProject();
if (dir != null) {
newProject.setBaseDir(dir);
if (savedDir != null) {
// has been set explicitly
newProject.setInheritedProperty(MagicNames.PROJECT_BASEDIR,
dir.getAbsolutePath());
}
} else {
dir = getProject().getBaseDir();
}
overrideProperties();
if (antFile == null) {
antFile = Main.DEFAULT_BUILD_FILENAME;
}
File file = FILE_UTILS.resolveFile(dir, antFile);
antFile = file.getAbsolutePath();
log("calling target(s) "
+ ((locals.size() > 0) ? locals.toString() : "[default]")
+ " in build file " + antFile, Project.MSG_VERBOSE);
newProject.setUserProperty(MagicNames.ANT_FILE , antFile);
String thisAntFile = getProject().getProperty(MagicNames.ANT_FILE);
// Are we trying to call the target in which we are defined (or
// the build file if this is a top level task)?
if (thisAntFile != null
&& file.equals(getProject().resolveFile(thisAntFile))
&& getOwningTarget() != null) {
if (getOwningTarget().getName().equals("")) {
if (getTaskName().equals("antcall")) {
throw new BuildException("antcall must not be used at"
+ " the top level.");
}
throw new BuildException(getTaskName() + " task at the"
+ " top level must not invoke"
+ " its own build file.");
}
}
try {
ProjectHelper.configureProject(newProject, file);
} catch (BuildException ex) {
throw ProjectHelper.addLocationToBuildException(
ex, getLocation());
}
if (locals.size() == 0) {
String defaultTarget = newProject.getDefaultTarget();
if (defaultTarget != null) {
locals.add(defaultTarget);
}
}
if (newProject.getProperty(MagicNames.ANT_FILE)
.equals(getProject().getProperty(MagicNames.ANT_FILE))
&& getOwningTarget() != null) {
String owningTargetName = getOwningTarget().getName();
if (locals.contains(owningTargetName)) {
throw new BuildException(getTaskName() + " task calling "
+ "its own parent target.");
}
boolean circular = false;
for (Iterator it = locals.iterator();
!circular && it.hasNext();) {
Target other =
(Target) (getProject().getTargets().get(it.next()));
circular |= (other != null
&& other.dependsOn(owningTargetName));
}
if (circular) {
throw new BuildException(getTaskName()
+ " task calling a target"
+ " that depends on"
+ " its parent target \'"
+ owningTargetName
+ "\'.");
}
}
addReferences();
if (locals.size() > 0 && !(locals.size() == 1
&& "".equals(locals.get(0)))) {
BuildException be = null;
try {
log("Entering " + antFile + "...", Project.MSG_VERBOSE);
newProject.fireSubBuildStarted();
newProject.executeTargets(locals);
} catch (BuildException ex) {
be = ProjectHelper
.addLocationToBuildException(ex, getLocation());
throw be;
} finally {
log("Exiting " + antFile + ".", Project.MSG_VERBOSE);
newProject.fireSubBuildFinished(be);
}
}
} finally {
// help the gc
newProject = null;
Enumeration e = properties.elements();
while (e.hasMoreElements()) {
Property p = (Property) e.nextElement();
p.setProject(null);
}
if (output != null && out != null) {
try {
out.close();
} catch (final Exception ex) {
//ignore
}
}
dir = savedDir;
antFile = savedAntFile;
}
}
/**
* Override the properties in the new project with the one
* explicitly defined as nested elements here.
* @throws BuildException under unknown circumstances.
*/
private void overrideProperties() throws BuildException {
// remove duplicate properties - last property wins
// Needed for backward compatibility
Set set = new HashSet();
for (int i = properties.size() - 1; i >= 0; --i) {
Property p = (Property) properties.get(i);
if (p.getName() != null && !p.getName().equals("")) {
if (set.contains(p.getName())) {
properties.remove(i);
} else {
set.add(p.getName());
}
}
}
Enumeration e = properties.elements();
while (e.hasMoreElements()) {
Property p = (Property) e.nextElement();
p.setProject(newProject);
p.execute();
}
getProject().copyInheritedProperties(newProject);
}
/**
* Add the references explicitly defined as nested elements to the
* new project. Also copy over all references that don't override
* existing references in the new project if inheritrefs has been
* requested.
* @throws BuildException if a reference does not have a refid.
*/
private void addReferences() throws BuildException {
Hashtable thisReferences
= (Hashtable) getProject().getReferences().clone();
Hashtable newReferences = newProject.getReferences();
Enumeration e;
if (references.size() > 0) {
for (e = references.elements(); e.hasMoreElements();) {
Reference ref = (Reference) e.nextElement();
String refid = ref.getRefId();
if (refid == null) {
throw new BuildException("the refid attribute is required"
+ " for reference elements");
}
if (!thisReferences.containsKey(refid)) {
log("Parent project doesn't contain any reference '"
+ refid + "'",
Project.MSG_WARN);
continue;
}
thisReferences.remove(refid);
String toRefid = ref.getToRefid();
if (toRefid == null) {
toRefid = refid;
}
copyReference(refid, toRefid);
}
}
// Now add all references that are not defined in the
// subproject, if inheritRefs is true
if (inheritRefs) {
for (e = thisReferences.keys(); e.hasMoreElements();) {
String key = (String) e.nextElement();
if (newReferences.containsKey(key)) {
continue;
}
copyReference(key, key);
newProject.inheritIDReferences(getProject());
}
}
}
/**
* Try to clone and reconfigure the object referenced by oldkey in
* the parent project and add it to the new project with the key newkey.
*
* <p>If we cannot clone it, copy the referenced object itself and
* keep our fingers crossed.</p>
* @param oldKey the reference id in the current project.
* @param newKey the reference id in the new project.
*/
private void copyReference(String oldKey, String newKey) {
Object orig = getProject().getReference(oldKey);
if (orig == null) {
log("No object referenced by " + oldKey + ". Can't copy to "
+ newKey,
Project.MSG_WARN);
return;
}
Class c = orig.getClass();
Object copy = orig;
try {
Method cloneM = c.getMethod("clone", new Class[0]);
if (cloneM != null) {
copy = cloneM.invoke(orig, new Object[0]);
log("Adding clone of reference " + oldKey, Project.MSG_DEBUG);
}
} catch (Exception e) {
// not Clonable
}
if (copy instanceof ProjectComponent) {
((ProjectComponent) copy).setProject(newProject);
} else {
try {
Method setProjectM =
c.getMethod("setProject", new Class[] {Project.class});
if (setProjectM != null) {
setProjectM.invoke(copy, new Object[] {newProject});
}
} catch (NoSuchMethodException e) {
// ignore this if the class being referenced does not have
// a set project method.
} catch (Exception e2) {
String msg = "Error setting new project instance for "
+ "reference with id " + oldKey;
throw new BuildException(msg, e2, getLocation());
}
}
newProject.addReference(newKey, copy);
}
/**
* Copies all properties from the given table to the new project -
* omitting those that have already been set in the new project as
* well as properties named basedir or ant.file.
* @param props properties <code>Hashtable</code> to copy to the
* new project.
* @since Ant 1.6
*/
private void addAlmostAll(Hashtable props) {
Enumeration e = props.keys();
while (e.hasMoreElements()) {
String key = e.nextElement().toString();
if (MagicNames.PROJECT_BASEDIR.equals(key) || MagicNames.ANT_FILE.equals(key)) {
// basedir and ant.file get special treatment in execute()
continue;
}
String value = props.get(key).toString();
// don't re-set user properties, avoid the warning message
if (newProject.getProperty(key) == null) {
// no user property
newProject.setNewProperty(key, value);
}
}
}
/**
* The directory to use as a base directory for the new Ant project.
* Defaults to the current project's basedir, unless inheritall
* has been set to false, in which case it doesn't have a default
* value. This will override the basedir setting of the called project.
* @param dir new directory as <code>File</code>.
*/
public void setDir(File dir) {
this.dir = dir;
}
/**
* The build file to use. Defaults to "build.xml". This file is expected
* to be a filename relative to the dir attribute given.
* @param antFile the <code>String</code> build file name.
*/
public void setAntfile(String antFile) {
// @note: it is a string and not a file to handle relative/absolute
// otherwise a relative file will be resolved based on the current
// basedir.
this.antFile = antFile;
}
/**
* The target of the new Ant project to execute.
* Defaults to the new project's default target.
* @param targetToAdd the name of the target to invoke.
*/
public void setTarget(String targetToAdd) {
if (targetToAdd.equals("")) {
throw new BuildException("target attribute must not be empty");
}
targets.add(targetToAdd);
targetAttributeSet = true;
}
/**
* Set the filename to write the output to. This is relative to the value
* of the dir attribute if it has been set or to the base directory of the
* current project otherwise.
* @param outputFile the name of the file to which the output should go.
*/
public void setOutput(String outputFile) {
this.output = outputFile;
}
/**
* Property to pass to the new project.
* The property is passed as a 'user property'.
* @return the created <code>Property</code> object.
*/
public Property createProperty() {
Property p = new Property(true, getProject());
p.setProject(getNewProject());
p.setTaskName("property");
properties.addElement(p);
return p;
}
/**
* Add a Reference element identifying a data type to carry
* over to the new project.
* @param ref <code>Reference</code> to add.
*/
public void addReference(Reference ref) {
references.addElement(ref);
}
/**
* Add a target to this Ant invocation.
* @param t the <code>TargetElement</code> to add.
* @since Ant 1.6.3
*/
public void addConfiguredTarget(TargetElement t) {
if (targetAttributeSet) {
throw new BuildException(
"nested target is incompatible with the target attribute");
}
String name = t.getName();
if (name.equals("")) {
throw new BuildException("target name must not be empty");
}
targets.add(name);
}
/**
* Add a set of properties to pass to the new project.
*
* @param ps <code>PropertySet</code> to add.
* @since Ant 1.6
*/
public void addPropertyset(PropertySet ps) {
propertySets.addElement(ps);
}
/*
* Get the (sub)-Project instance currently in use.
* @return Project
* @since Ant 1.7
*/
protected Project getNewProject() {
if (newProject == null) {
reinit();
}
return newProject;
}
/**
* @since Ant 1.6.2
*/
private Iterator getBuildListeners() {
return getProject().getBuildListeners().iterator();
}
/**
* Helper class that implements the nested <reference>
* element of <ant> and <antcall>.
*/
public static class Reference
extends org.apache.tools.ant.types.Reference {
/** Creates a reference to be configured by Ant. */
public Reference() {
super();
}
private String targetid = null;
/**
* Set the id that this reference to be stored under in the
* new project.
*
* @param targetid the id under which this reference will be passed to
* the new project. */
public void setToRefid(String targetid) {
this.targetid = targetid;
}
/**
* Get the id under which this reference will be stored in the new
* project.
*
* @return the id of the reference in the new project.
*/
public String getToRefid() {
return targetid;
}
}
/**
* Helper class that implements the nested <target>
* element of <ant> and <antcall>.
* @since Ant 1.6.3
*/
public static class TargetElement {
private String name;
/**
* Default constructor.
*/
public TargetElement() {
//default
}
/**
* Set the name of this TargetElement.
* @param name the <code>String</code> target name.
*/
public void setName(String name) {
this.name = name;
}
/**
* Get the name of this TargetElement.
* @return <code>String</code>.
*/
public String getName() {
return name;
}
}
}
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