| /* |
| * 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 org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.ProjectHelper; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.Task; |
| import org.apache.tools.ant.util.FileUtils; |
| |
| import java.io.File; |
| import java.util.Vector; |
| |
| /** |
| * Task to import another build file into the current project. |
| * <p> |
| * It must be 'top level'. On execution it will read another Ant file |
| * into the same Project. |
| * </p> |
| * <p> |
| * <b>Important</b>: we have not finalized how relative file references |
| * will be resolved in deep/complex build hierarchies - such as what happens |
| * when an imported file imports another file. Use absolute references for |
| * enhanced build file stability, especially in the imported files. |
| * </p> |
| * <p>Examples:</p> |
| * <pre> |
| * <import file="../common-targets.xml"/> |
| * </pre> |
| * <p>Import targets from a file in a parent directory.</p> |
| * <pre> |
| * <import file="${deploy-platform}.xml"/> |
| * </pre> |
| * <p>Import the project defined by the property <code>deploy-platform</code>.</p> |
| * |
| * @since Ant1.6 |
| * @ant.task category="control" |
| */ |
| public class ImportTask extends Task { |
| private String file; |
| private boolean optional; |
| private static final FileUtils FILE_UTILS = FileUtils.getFileUtils(); |
| |
| /** |
| * sets the optional attribute |
| * |
| * @param optional if true ignore files that are not present, |
| * default is false |
| */ |
| public void setOptional(boolean optional) { |
| this.optional = optional; |
| } |
| |
| /** |
| * the name of the file to import. How relative paths are resolved is still |
| * in flux: use absolute paths for safety. |
| * @param file the name of the file |
| */ |
| public void setFile(String file) { |
| // I don't think we can use File - different rules |
| // for relative paths. |
| this.file = file; |
| } |
| |
| /** |
| * This relies on the task order model. |
| * |
| */ |
| public void execute() { |
| if (file == null) { |
| throw new BuildException("import requires file attribute"); |
| } |
| if (getOwningTarget() == null |
| || !"".equals(getOwningTarget().getName())) { |
| throw new BuildException("import only allowed as a top-level task"); |
| } |
| |
| ProjectHelper helper = |
| (ProjectHelper) getProject(). |
| getReference(ProjectHelper.PROJECTHELPER_REFERENCE); |
| |
| if (helper == null) { |
| // this happens if the projecthelper was not registered with the project. |
| throw new BuildException("import requires support in ProjectHelper"); |
| } |
| |
| Vector importStack = helper.getImportStack(); |
| |
| if (importStack.size() == 0) { |
| // this happens if ant is used with a project |
| // helper that doesn't set the import. |
| throw new BuildException("import requires support in ProjectHelper"); |
| } |
| |
| if (getLocation() == null || getLocation().getFileName() == null) { |
| throw new BuildException("Unable to get location of import task"); |
| } |
| |
| File buildFile = new File(getLocation().getFileName()).getAbsoluteFile(); |
| |
| // Paths are relative to the build file they're imported from, |
| // *not* the current directory (same as entity includes). |
| |
| File buildFileParent = new File(buildFile.getParent()); |
| File importedFile = FILE_UTILS.resolveFile(buildFileParent, file); |
| |
| getProject().log("Importing file " + importedFile + " from " |
| + buildFile.getAbsolutePath(), Project.MSG_VERBOSE); |
| |
| if (!importedFile.exists()) { |
| String message = |
| "Cannot find " + file + " imported from " |
| + buildFile.getAbsolutePath(); |
| if (optional) { |
| getProject().log(message, Project.MSG_VERBOSE); |
| return; |
| } else { |
| throw new BuildException(message); |
| } |
| } |
| |
| if (importStack.contains(importedFile)) { |
| getProject().log( |
| "Skipped already imported file:\n " |
| + importedFile + "\n", Project.MSG_VERBOSE); |
| return; |
| } |
| |
| try { |
| helper.parse(getProject(), importedFile); |
| } catch (BuildException ex) { |
| throw ProjectHelper.addLocationToBuildException( |
| ex, getLocation()); |
| } |
| } |
| |
| } |