Hi,
I previously sent something like this to ant-user, but Stefan told me this is
the place it should go.
In order to be able to support using the hostname in build files, attached 2
files for 2 different approaches:
a) Project.java.diff: Sets the property "ant.hostname" during the Ant
bootstrap process. This patch is made against Project.java 1.109.
b) HostnameTask.java: A separate task for setting the hostname.
Personally, I prefer the first approach, but I don't make decisions :-)
Ernst
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Ernst de Haan
EuroNet Internet B.V.
"Come to me all who are weary and burdened
and I will give you rest" -- Jesus Christ
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Ant", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.tools.ant.taskdefs;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
/**
* Task that puts the hostname in a property. The name of the property can be
* specified in the <code>property</code> attribute. If it is not specified,
* then the default name of the property will be <code>hostname</code>.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Ernst de Haan</a>
*/
public class HostnameTask extends Task {
/**
* The default name of the property. The default property name is
* <code>hostname</code>.
*/
private final static String DEFAULT_PROPERTY_NAME = "hostname";
/**
* The name of the property to put the hostname in. By default it is set
* to [EMAIL PROTECTED] #DEFAULT_PROPERTY_NAME}.
*/
private String propertyName = DEFAULT_PROPERTY_NAME;
/**
* Sets the property name. If the argument is <code>null</code>, then the
* property name will be reset to the default.
*
* @param newPropertyName
* the property name or <code>null</code>.
*/
public void setProperty(String newPropertyName) {
// If the argument is null or empty, then fallback to the default
if (newPropertyName == null) {
propertyName = DEFAULT_PROPERTY_NAME;
} else {
newPropertyName = newPropertyName.trim();
if ("".equals(newPropertyName)) {
propertyName = DEFAULT_PROPERTY_NAME;
// ...otherwise use the trimmed name
} else {
propertyName = newPropertyName;
}
}
}
public void execute() throws BuildException {
// Do not override an existing property with the same name
if (project.getUserProperty(propertyName) != null) {
log("Override ignored for property \"" + propertyName + "\".", Project.MSG_VERBOSE);
}
// Determine the IP address of the current host
InetAddress localhost;
try {
localhost = InetAddress.getLocalHost();
} catch (UnknownHostException unknownHostException) {
log("Unable to determine internet address of localhost. Not setting property \"" + propertyName + "\".", Project.MSG_ERR);
return;
} catch (SecurityException securityException) {
log("Determining internet address of localhost is disallowed by security manager. Not setting property \"" + propertyName + "\".", Project.MSG_ERR);
return;
}
// Determine the hostname
String hostname;
try {
hostname = localhost.getHostName();
} catch (SecurityException securityException) {
log("Determining hostname of localhost is disallowed by security manager. Not setting property \"" + propertyName + "\".", Project.MSG_ERR);
return;
}
// Make *sure* that we have the hostname
if (hostname == null || "".equals(hostname.trim()) || "localhost".equals(hostname.trim())) {
log("Determining hostname of localhost failed. Not setting property \"" + propertyName + "\".", Project.MSG_ERR);
return;
}
// Set the property to contain the hostname
project.setUserProperty(propertyName, hostname);
}
}
Index: Project.java
===================================================================
RCS file: /home/cvspublic/jakarta-ant/src/main/org/apache/tools/ant/Project.java,v
retrieving revision 1.109
diff -d -u -r1.109 Project.java
--- Project.java 1 Jun 2002 12:26:37 -0000 1.109
+++ Project.java 3 Jun 2002 11:16:23 -0000
@@ -57,6 +57,8 @@
import java.io.File;
import java.io.InputStream;
import java.io.IOException;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
import java.util.Hashtable;
import java.util.Vector;
import java.util.Properties;
@@ -242,6 +244,7 @@
*/
public void init() throws BuildException {
setJavaVersionProperty();
+ setHostnameProperty();
String defs = "/org/apache/tools/ant/taskdefs/defaults.properties";
@@ -772,6 +775,28 @@
+ System.getProperty("java.home"), MSG_VERBOSE);
log("Detected OS: " + System.getProperty("os.name"), MSG_VERBOSE);
+ }
+
+ /**
+ * Sets the <code>ant.hostname</code> property. A verbose log message is
+ * generated to record the hostname and IP address. If the hostname cannot
+ * be determined, then the <code>hostname</code> property is not set.
+ */
+ public void setHostnameProperty() {
+ try {
+ InetAddress localhost = InetAddress.getLocalHost();
+ if (localhost == null) {
+ log("Unable to determine IP address of this host.", MSG_ERR);
+ return;
+ }
+ String hostname = localhost.getHostName();
+ setPropertyInternal("ant.hostname", hostname);
+ log("Detected hostname: " + hostname, MSG_VERBOSE);
+ } catch (UnknownHostException unknownHostException) {
+ log("Unable to determine IP address of this host.", MSG_ERR);
+ } catch (SecurityException securityException) {
+ log("Not allowed to determine IP address of this host.", MSG_ERR);
+ }
}
/**
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