com.google.gct.idea.appengine.synchronization.SampleSyncTask.java Source code

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Here is the source code for com.google.gct.idea.appengine.synchronization.SampleSyncTask.java

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/*
 * Copyright (C) 2014 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.google.gct.idea.appengine.synchronization;

import com.intellij.openapi.diagnostic.Logger;

import org.apache.commons.io.FileUtils;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.jetbrains.annotations.TestOnly;

import java.io.File;
import java.io.IOException;

/**
 * Runnable that create and synchronized the local sample repo with a github repo.
 */
public class SampleSyncTask implements Runnable {
    public static final Logger LOG = Logger.getInstance(SampleSyncTask.class);

    private static SampleSyncTask instance;
    private final String ANDROID_REPO_PATH = System.getProperty("user.home") + "/.android/cloud/templates";
    private final String GITHUB_SAMPLE_LINK = "https://github.com/GoogleCloudPlatform/gradle-appengine-templates.git";
    private final String LOCAL_REPO_PATH;
    private final String SAMPLE_LINK;

    public static SampleSyncTask getInstance() {
        if (instance == null) {
            instance = new SampleSyncTask();
        }
        return instance;
    }

    @Override
    public void run() {
        updateSampleRepo();
    }

    @TestOnly
    public SampleSyncTask(String testRepoDirectory, String testSampleLink) {
        LOCAL_REPO_PATH = testRepoDirectory;
        SAMPLE_LINK = testSampleLink;
    }

    private SampleSyncTask() {
        LOCAL_REPO_PATH = ANDROID_REPO_PATH;
        SAMPLE_LINK = GITHUB_SAMPLE_LINK;
    }

    private void updateSampleRepo() {
        Git localGitRepo = getLocalRepo();

        if (localGitRepo == null) {
            // clone repo
            localGitRepo = cloneGithubRepo();
        } else {
            // sync repo
            try {
                localGitRepo.pull().call();
            } catch (GitAPIException e) {
                LOG.error("Error syncing local sample repository", e);
            }
        }

        if (localGitRepo != null) {
            localGitRepo.getRepository().close();
        }
    }

    private Git getLocalRepo() {
        File localRepo = new File(LOCAL_REPO_PATH);

        if (localRepo.exists()) {
            try {
                return Git.open(localRepo);
            } catch (IOException e) {
                LOG.error("Error getting the local sample repository", e);
            }
        }
        return null;
    }

    private Git cloneGithubRepo() {
        File localRepoDirectory = new File(LOCAL_REPO_PATH);
        if (localRepoDirectory.exists()) {
            try {
                FileUtils.forceDelete(localRepoDirectory);
            } catch (IOException e) {
                LOG.error("Error deleting " + LOCAL_REPO_PATH, e);
            }
        }

        try {
            Git localGitRepo = Git.cloneRepository().setURI(SAMPLE_LINK).setDirectory(new File(LOCAL_REPO_PATH))
                    .call();
            return localGitRepo;
        } catch (GitAPIException e) {
            LOG.error("Error cloning github sample repository: " + SAMPLE_LINK, e);
        }

        return null;
    }
}