krysalis-update/src/java/org/krysalis/depot/update/ant AntUtils.java,NONE,1.1

Update of /cvsroot/krysalis/krysalis-update/src/java/org/krysalis/depot/update/ant
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv26022/src/java/org/krysalis/depot/update/ant

Added Files:
	AntUtils.java 
Log Message:
move

--- NEW FILE: AntUtils.java ---
/*
 * ========================================================================
 * Copyright 2004 The Apache Software Foundation
 * 
 * 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 org.krysalis.depot.update.ant;
import java.io.File;

import org.apache.tools.ant.BuildException; 
import org.apache.tools.ant.Project;
/**
 * A static collection of AntUtils
 */
public class AntUtils {
	/**
	 * Private constructor for static class
	 *  
	 */
	private AntUtils() {
	}
	/**
	 * validate and create a dir if needed. Ignore if dir is null
	 * 
	 * @param dir
	 * @param name
	 * @param failOnError
	 * @throws BuildException
	 *             if dir is not a Directory or can not be created
	 */
	public static void createAndValidateDir(Project p, File dir,
			final String name, boolean failOnError) throws BuildException {
		if (dir != null) {
			if (!dir.exists()) {
				if (!dir.mkdirs()) {
					final String message = "Could not create dir for " + name
							+ " at " + dir.getAbsolutePath();
					if (failOnError) {
						throw new BuildException(message);
					} else {
						p.log(message, Project.MSG_WARN);
					}
				}
			} else if (!dir.isDirectory()) {
				throw new BuildException(name + " at " + dir.getAbsolutePath()
						+ " is not a directroy");
			}
		}
	}
	/**
	 * create/validate the user.home.
	 * 
	 * @param project
	 * @return File a valid user home dir or null
	 */
	public static File getUserHome(Project project) {
		return findAndCreateDirFromProperty(project, "user.home");
	}
	/**
	 * @return
	 */
	public static File getDepotHome(Project p) {
		File depotHome = findAndCreateDirFromProperty(p, "depot.home");
		if (depotHome == null) {
			File userHome = getUserHome(p);
			depotHome = new File(userHome, ".apache.depot");
			createAndValidateDir(p, depotHome, "${user.home}/.apache.depot",
					true);
		}
		if (depotHome == null) {
			throw new BuildException("The property depot.home must be set");
		}
		return depotHome;
	}
	/**
	 * find a property and then create and validate it
	 * 
	 * @param p
	 *            the ant Project
	 * @param dirProperty
	 *            the property that has the dir path
	 * @return the dir, created if possille, null if not
	 */
	public static File findAndCreateDirFromProperty(Project p,
			String dirProperty) {
		String antletsDirName = p.getProperty(dirProperty);
		File antletsDir = null;
		if (null == antletsDirName) {
			p.log(dirProperty + " not defined.", Project.MSG_DEBUG);
		} else {
			antletsDir = new File(antletsDirName);
			if (!antletsDir.exists()) {
				p.log("Unable to create dir " + antletsDir.getAbsolutePath(),
						Project.MSG_WARN);
				antletsDir = null;
			} else if (!antletsDir.isDirectory()) {
				throw new BuildException("Property ${" + dirProperty + "} -> ["
						+ antletsDir.getAbsolutePath()
						+ "] not a workable directory.");
			} else {
				p.log(dirProperty + " =" + antletsDir, Project.MSG_DEBUG);
			}
		}
		return antletsDir;
	}
}


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