net.minecraftforge.gradle.util.caching.CacheCheckSpec.java Source code

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Here is the source code for net.minecraftforge.gradle.util.caching.CacheCheckSpec.java

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/*
 * A Gradle plugin for the creation of Minecraft mods and MinecraftForge plugins.
 * Copyright (C) 2013 Minecraft Forge
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
 * USA
 */
package net.minecraftforge.gradle.util.caching;

import java.io.File;
import java.nio.charset.Charset;

import org.gradle.api.Task;
import org.gradle.api.logging.Logger;
import org.gradle.api.specs.Spec;

import com.google.common.io.Files;

public class CacheCheckSpec implements Spec<Task> {
    private final CacheContainer container;

    public CacheCheckSpec(CacheContainer container) {
        this.container = container;
    }

    @Override
    public boolean isSatisfiedBy(Task task) {
        return isSatisfiedBy((ICachableTask) task);
    }

    public boolean isSatisfiedBy(ICachableTask task) {
        Logger logger = task.getProject().getLogger();

        task.getInputs();

        if (!task.doesCache() || container.cachedList.isEmpty())
            return true;

        for (Annotated field : container.cachedList) {
            try {
                File file = task.getProject().file(field.getValue(task));

                // not there? do the task.
                if (!file.exists()) {
                    logger.info("No output file found.");
                    return true;
                }

                File hashFile = CacheUtil.getHashFile(file);
                if (!hashFile.exists()) {
                    logger.info("No cache file found.");
                    file.delete(); // Kill the output file if the hash doesn't exist, else gradle will think it's up-to-date
                    return true;
                }

                String foundMD5 = Files.toString(CacheUtil.getHashFile(file), Charset.defaultCharset());
                String calcMD5 = CacheUtil.getHashes(field, container.inputList, task);

                if (!calcMD5.equals(foundMD5)) {
                    logger.info(" Corrupted Cache!");
                    logger.info("Checksums found: " + foundMD5);
                    logger.info("Checksums calculated: " + calcMD5);
                    file.delete();
                    CacheUtil.getHashFile(file).delete();
                    return true;
                }

                logger.debug("Checksums found: " + foundMD5);
                logger.debug("Checksums calculated: " + calcMD5);

            }
            // error? spit it and do the task.
            catch (Exception e) {
                e.printStackTrace();
                return true;
            }
        }

        // no problems? all of em are here? skip the task.
        return false;
    }
}