/*
* Copyright 2016 the original author or authors.
*
* 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.gradle.internal.cleanup;
import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import org.gradle.api.UncheckedIOException;
import org.gradle.api.internal.DocumentationRegistry;
import org.gradle.api.internal.file.delete.Deleter;
import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.internal.FileUtils;
import java.io.File;
import java.util.Collection;
public class DefaultBuildOutputDeleter implements BuildOutputDeleter {
public static final String STALE_OUTPUT_MESSAGE = "Gradle is removing stale outputs from a previous version of Gradle, for more information about stale outputs see";
private final Logger logger = Logging.getLogger(DefaultBuildOutputDeleter.class);
private final DocumentationRegistry documentationRegistry;
private final Deleter deleter;
public DefaultBuildOutputDeleter(DocumentationRegistry documentationRegistry, Deleter deleter) {
this.documentationRegistry = documentationRegistry;
this.deleter = deleter;
}
@Override
public void delete(final Iterable<File> outputs) {
Collection<? extends File> roots = Collections2.filter(FileUtils.calculateRoots(outputs), new Predicate<File>() {
@Override
public boolean apply(File file) {
return file.exists();
}
});
if (!roots.isEmpty()) {
logger.warn(STALE_OUTPUT_MESSAGE + " {}.", documentationRegistry.getDocumentationFor("more_about_tasks", "sec:stale_task_outputs"));
for (File output : roots) {
deleteOutput(output);
}
}
}
private void deleteOutput(final File output) {
try {
if (output.isDirectory()) {
deleter.delete(output);
logger.info("Deleted directory '{}'", output);
} else if (output.isFile()) {
deleter.delete(output);
logger.info("Deleted file '{}'", output);
}
} catch (UncheckedIOException e) {
logger.warn("Unable to delete '{}'", output);
}
}
}