ch.sourcepond.maven.release.scm.git.GitFactory.java Source code

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Here is the source code for ch.sourcepond.maven.release.scm.git.GitFactory.java

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/*Copyright (C) 2016 Roland Hauser, <sourcepond@gmail.com>
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 ch.sourcepond.maven.release.scm.git;

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

import javax.inject.Named;
import javax.inject.Singleton;

import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.errors.RepositoryNotFoundException;

import ch.sourcepond.maven.release.scm.SCMException;

@Named
@Singleton
public class GitFactory {

    public Git newGit() throws SCMException {
        final File gitDir = new File(".");
        try {
            return Git.open(gitDir);
        } catch (final RepositoryNotFoundException rnfe) {
            final String fullPathOfCurrentDir = pathOf(gitDir);
            final File gitRoot = getGitRootIfItExistsInOneOfTheParentDirectories(new File(fullPathOfCurrentDir));
            if (gitRoot == null) {
                throw new SCMException("Releases can only be performed from Git repositories.")
                        .add("%s is not a Git repository.", fullPathOfCurrentDir);
            }
            throw new SCMException("The release plugin can only be run from the root folder of your Git repository")
                    .add("%s is not the root of a Gir repository", fullPathOfCurrentDir)
                    .add("Try running the release plugin from %s", pathOf(gitRoot));
        } catch (final Exception e) {
            throw new SCMException("Could not open git repository. Is %s a git repository?", pathOf(gitDir))
                    .add("Exception returned when accessing the git repo: %s", e.toString());
        }
    }

    private static String pathOf(final File file) {
        String path;
        try {
            path = file.getCanonicalPath();
        } catch (final IOException e1) {
            path = file.getAbsolutePath();
        }
        return path;
    }

    private static File getGitRootIfItExistsInOneOfTheParentDirectories(File candidateDir) {
        while (candidateDir != null && /* HACK ATTACK! Maybe.... */ !candidateDir.getName().equals("target")) {
            if (new File(candidateDir, ".git").isDirectory()) {
                return candidateDir;
            }
            candidateDir = candidateDir.getParentFile();
        }
        return null;
    }
}