- /*
- * Copyright 2000,2002-2004 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.apache.tools.ant.taskdefs;
-
- import java.io.File;
- import java.io.IOException;
- import org.apache.tools.ant.BuildException;
- import org.apache.tools.ant.Project;
- import org.apache.tools.ant.Task;
- import org.apache.tools.ant.types.Commandline;
-
- /**
- * Patches a file by applying a 'diff' file to it; requires "patch" to be
- * on the execution path.
- *
- * @since Ant 1.1
- *
- * @ant.task category="utility"
- */
- public class Patch extends Task {
-
- private File originalFile;
- private File directory;
- private boolean havePatchfile = false;
- private Commandline cmd = new Commandline();
-
- /**
- * The file to patch; optional if it can be inferred from
- * the diff file
- * @param file the file to patch
- */
- public void setOriginalfile(File file) {
- originalFile = file;
- }
-
- /**
- * The name of a file to send the output to, instead of patching
- * the file(s) in place; optional.
- * @param file the file to send the output to
- * @since Ant 1.6
- */
- public void setDestfile(File file) {
- if (file != null) {
- cmd.createArgument().setValue("-o");
- cmd.createArgument().setFile(file);
- }
- }
-
- /**
- * The file containing the diff output; required.
- * @param file the file containing the diff output
- */
- public void setPatchfile(File file) {
- if (!file.exists()) {
- throw new BuildException("patchfile " + file + " doesn\'t exist",
- getLocation());
- }
- cmd.createArgument().setValue("-i");
- cmd.createArgument().setFile(file);
- havePatchfile = true;
- }
-
- /**
- * flag to create backups; optional, default=false
- * @param backups if true create backups
- */
- public void setBackups(boolean backups) {
- if (backups) {
- cmd.createArgument().setValue("-b");
- }
- }
-
- /**
- * flag to ignore whitespace differences; default=false
- * @param ignore if true ignore whitespace differences
- */
- public void setIgnorewhitespace(boolean ignore) {
- if (ignore) {
- cmd.createArgument().setValue("-l");
- }
- }
-
- /**
- * Strip the smallest prefix containing <i>num</i> leading slashes
- * from filenames.
- *
- * <p>patch's <i>-p</i> option.
- * @param num number of lines to strip
- * @exception BuildException if num is < 0, or other errors
- */
- public void setStrip(int num) throws BuildException {
- if (num < 0) {
- throw new BuildException("strip has to be >= 0", getLocation());
- }
- cmd.createArgument().setValue("-p" + num);
- }
-
- /**
- * Work silently unless an error occurs; optional, default=false
- * @param q if true suppress set the -s option on the patch command
- */
- public void setQuiet(boolean q) {
- if (q) {
- cmd.createArgument().setValue("-s");
- }
- }
-
- /**
- * Assume patch was created with old and new files swapped; optional,
- * default=false
- * @param r if true set the -R option on the patch command
- */
- public void setReverse(boolean r) {
- if (r) {
- cmd.createArgument().setValue("-R");
- }
- }
-
- /**
- * The directory to run the patch command in, defaults to the
- * project's base directory.
- * @param directory the directory to run the patch command in
- * @since Ant 1.5
- */
- public void setDir(File directory) {
- this.directory = directory;
- }
-
- /**
- * execute patch
- * @throws BuildException when it all goes a bit pear shaped
- */
- public void execute() throws BuildException {
- if (!havePatchfile) {
- throw new BuildException("patchfile argument is required",
- getLocation());
- }
- Commandline toExecute = (Commandline) cmd.clone();
- toExecute.setExecutable("patch");
-
- if (originalFile != null) {
- toExecute.createArgument().setFile(originalFile);
- }
-
- Execute exe = new Execute(new LogStreamHandler(this, Project.MSG_INFO,
- Project.MSG_WARN),
- null);
- exe.setCommandline(toExecute.getCommandline());
-
- if (directory != null) {
- if (directory.exists() && directory.isDirectory()) {
- exe.setWorkingDirectory(directory);
- } else if (!directory.isDirectory()) {
- throw new BuildException(directory + " is not a directory.",
- getLocation());
- } else {
- throw new BuildException("directory " + directory
- + " doesn\'t exist", getLocation());
- }
- } else {
- exe.setWorkingDirectory(getProject().getBaseDir());
- }
-
- log(toExecute.describeCommand(), Project.MSG_VERBOSE);
- try {
- exe.execute();
- } catch (IOException e) {
- throw new BuildException(e, getLocation());
- }
- }
- }