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/*
* Copyright (C) 2009 The Android Open Source Project
*
* 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 com.android.ant;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* A base class for the ant task that contains logic for handling dependency files
*/
public abstract class BaseTask extends Task {
private DependencyGraph mDependencies;
private String mPreviousBuildType;
private String mBuildType;
public void setPreviousBuildType(String previousBuildType) {
mPreviousBuildType = previousBuildType;
}
public void setBuildType(String buildType) {
mBuildType = buildType;
}
protected abstract String getExecTaskName();
private Set<String> mRestrictTouchedExtensionsTo;
/**
* Sets the value of the "restricttouchedextensionsto" attribute.
* @param touchedExtensions the extensions to check to see if they have been modified.
* values should be separated by a colon (:). If left blank or not set, all extensions
* will be checked.
*/
public void setRestrictTouchedExtensionsTo(String restrictTouchedExtensionsTo) {
mRestrictTouchedExtensionsTo = new HashSet<String>();
String[] extensions = restrictTouchedExtensionsTo.split(":");
for (String s : extensions) {
mRestrictTouchedExtensionsTo.add(s);
}
}
/**
* Set up the dependency graph by passing it the location of the ".d" file, and the new input
* paths.
* @param dependencyFile path to the dependency file to use
* @param the new input paths for this new compilation.
* @return true if the dependency graph was successfully initialized
*/
protected boolean initDependencies(String dependencyFile, List<File> inputPaths) {
if (mBuildType != null && mBuildType.equals(mPreviousBuildType) == false) {
// we don't care about deps, we need to execute the task no matter what.
return true;
}
File depFile = new File(dependencyFile);
if (depFile.exists()) {
mDependencies = new DependencyGraph(dependencyFile, inputPaths);
return true;
} else {
return false;
}
}
/**
* Wrapper check to see if we need to execute this task at all
* @return true if the DependencyGraph reports that our prereqs or targets
* have changed since the last run
*/
protected boolean dependenciesHaveChanged() {
if (mBuildType != null && mBuildType.equals(mPreviousBuildType) == false) {
String execName = getExecTaskName();
if (execName == null) {
System.out.println(
"Current build type is different than previous build: forced task run.");
} else {
System.out.println(
"Current build type is different than previous build: forced " +
execName + " run.");
}
return true;
}
assert mDependencies != null : "Dependencies have not been initialized";
return mDependencies.dependenciesHaveChanged(mRestrictTouchedExtensionsTo,
true /*printStatus*/);
}
protected void generateDependencyFile(String depFilePath,
List<File> inputs, String outputFile) {
File file = new File(depFilePath);
try {
PrintStream ps = new PrintStream(file);
// write the output file.
ps.print(outputFile);
ps.println(" : \\");
//write the input files
int count = inputs.size();
for (int i = 0 ; i < count ; i++) {
File input = inputs.get(i);
if (input.isDirectory()) {
writeContent(ps, input);
} else {
ps.print(input.getAbsolutePath());
ps.println(" \\");
}
}
ps.close();
} catch (FileNotFoundException e) {
new BuildException(e);
}
}
private void writeContent(PrintStream ps, File input) {
File[] files = input.listFiles();
if (files != null) {
for (File f : files) {
if (f.isDirectory()) {
writeContent(ps, f);
} else {
ps.print(f.getAbsolutePath());
ps.println(" \\");
}
}
}
}
}
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