hd3gtv.configuration.GitInfo.java Source code

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Here is the source code for hd3gtv.configuration.GitInfo.java

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/*
 * This file is part of MyDMAM.
 * 
 * This program 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 3 of the License, or
 * any later version.
 *
 * This program 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.
 * 
 * Copyright (C) hdsdi3g for hd3g.tv 2013-2014
 * 
*/
package hd3gtv.configuration;

import hd3gtv.log2.Log2;

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

import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;

public class GitInfo {

    private String branch = "unknown";
    private String commit = "00000000";

    public GitInfo(File repository_file) throws IOException {
        if (repository_file == null) {
            throw new NullPointerException("\"repository_file\" can't to be null");
        }
        if (repository_file.exists() == false) {
            throw new IOException("Can't found \"" + repository_file + "\"");
        }
        if (repository_file.isDirectory() == false) {
            throw new IOException("\"" + repository_file + "\" is not a directory");
        }

        try {
            FileRepositoryBuilder builder = new FileRepositoryBuilder();
            Repository repository = builder.setGitDir(repository_file).readEnvironment().findGitDir().build();
            if (repository.getBranch() == null) {
                throw new FileNotFoundException("Can't found branch in \"" + repository_file + "\"");
            }
            branch = repository.getBranch();
            commit = repository.getRef(Constants.HEAD).getObjectId().abbreviate(8).name();
        } catch (Exception e) {
            throw new IOException("Can't load git repository \"" + repository_file + "\"");
        }
    }

    public String getBranch() {
        return branch;
    }

    public String getCommit() {
        return commit;
    }

    public String getActualRepositoryInformation() {
        return branch + " " + commit;
    }

    public static GitInfo getFromRoot() {
        try {
            File git_dir = new File(".git");
            if (git_dir.exists()) {
                return new GitInfo(git_dir);
            }

            String[] classpathelementsstr = System.getProperty("java.class.path")
                    .split(System.getProperty("path.separator"));
            File cp_element;
            for (int i = 0; i < classpathelementsstr.length; i++) {
                if (classpathelementsstr[i].endsWith(".jar")) {
                    continue;
                }
                cp_element = new File(classpathelementsstr[i]);
                if (cp_element.isDirectory() == false) {
                    continue;
                }
                git_dir = new File(cp_element.getCanonicalPath() + File.separator + ".git");
                if (git_dir.exists()) {
                    return new GitInfo(git_dir);
                } else if (cp_element.getCanonicalPath().endsWith(File.separator + "conf")) {
                    git_dir = new File(
                            cp_element.getCanonicalFile().getParentFile().getPath() + File.separator + ".git");
                    if (git_dir.exists()) {
                        return new GitInfo(git_dir);
                    }
                }
            }
            throw new FileNotFoundException();
        } catch (IOException e) {
            Log2.log.error("Can't access to local code git repository", e);
            return null;
        }
    }
}