net.polydawn.mdm.MdmModuleRelease.java Source code

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Here is the source code for net.polydawn.mdm.MdmModuleRelease.java

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/*
 * Copyright 2012 - 2014 Eric Myhre <http://exultant.us>
 *
 * This file is part of mdm <https://github.com/heavenlyhash/mdm/>.
 *
 * mdm 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, version 3 of the License, or
 * (at your option) 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.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package net.polydawn.mdm;

import java.io.*;
import net.polydawn.mdm.errors.*;
import org.eclipse.jgit.lib.*;
import org.eclipse.jgit.storage.file.*;
import org.eclipse.jgit.submodule.*;

public class MdmModuleRelease extends MdmModule {
    /**
     * Open the repo at given path, throw if there's no repo or if it's missing the
     * telltales of being an mdm release repo.
     *
     * @param relRepoPath path to repository to load.  Doubles as name.
     * @return a repository that smells like a proper mdm release repo.
     * @throws MdmRepositoryNonexistant if there's no repository there
     * @throws MdmRepositoryIOException if there were errors reading the repository
     * @throws MdmModuleTypeException if the repository doesn't look like an {@link MdmModuleRelease}.
     */
    public static MdmModuleRelease load(String relRepoPath)
            throws MdmRepositoryNonexistant, MdmRepositoryIOException, MdmModuleTypeException {
        Repository relRepo;
        try {
            relRepo = new FileRepositoryBuilder().setWorkTree(new File(relRepoPath).getCanonicalFile()) // must use getCanonicalFile to work around https://bugs.eclipse.org/bugs/show_bug.cgi?id=407478
                    .build();
        } catch (IOException e) {
            throw new MdmRepositoryIOException(false, relRepoPath, e);
        }
        if (relRepo == null) // check that releases-repo is a git repo at all
            throw new MdmRepositoryNonexistant(relRepoPath);
        return new MdmModuleRelease(relRepo, relRepoPath, null, null, null);
    }

    public static MdmModuleRelease load(Repository parent, SubmoduleWalk generator, Config gitmodulesCfg)
            throws MdmRepositoryNonexistant, MdmRepositoryIOException, MdmModuleTypeException {
        try {
            return new MdmModuleRelease(generator.getRepository(), generator.getPath(), parent, gitmodulesCfg,
                    generator.getObjectId());
        } catch (IOException e) {
            throw new MdmRepositoryIOException(false, generator.getPath(), e);
        }
    }

    public static MdmModuleRelease load(Repository parent, String path, Config gitmodulesCfg)
            throws MdmRepositoryNonexistant, MdmRepositoryIOException, MdmModuleTypeException {
        try {
            Repository repo = SubmoduleWalk.getSubmoduleRepository(parent, path);
            return new MdmModuleRelease(repo, path, parent, gitmodulesCfg, null);
        } catch (IOException e) {
            throw new MdmRepositoryIOException(false, path, e);
        }
    }

    public static class MdmModuleReleaseNeedsBranch extends MdmModuleTypeException {
        public MdmModuleReleaseNeedsBranch(String relRepoPath, String branchName) {
            super("releases-repo directory '" + relRepoPath
                    + "' contains a git repo, but it doesn't look like something that's been set up for mdm releases.\n(There's no branch named \""
                    + branchName + "\", and there should be.)");
        }
    }

    private MdmModuleRelease(Repository repo, String handle, Repository parentRepo, Config gitmodulesCfg,
            ObjectId indexId) throws MdmModuleTypeException, MdmRepositoryIOException {
        super(repo, handle, parentRepo, gitmodulesCfg, indexId);
    }

    public MdmModuleType getType() {
        return MdmModuleType.RELEASES;
    }

    /**
     * Check branch structure to see if the repo currently presents itself as a releases repository.
     */
    public void assertPresentsAsReleaseRepo() {
        try {
            // we can have a gitlink committed in parent, but no repo currently present.
            if (repo == null)
                throw new MdmRepositoryNonexistant(getHandle());
            // check that the releases-repo has the branches we expect from an mdm releases repo
            if (repo.getRef("refs/heads/mdm/init") == null && repo.getRef("refs/remotes/origin/mdm/init") == null)
                throw new MdmModuleReleaseNeedsBranch(getHandle(), "mdm/init");
            if (repo.getRef("refs/heads/master") == null)
                throw new MdmModuleReleaseNeedsBranch(getHandle(), "master");
        } catch (IOException e) {
            throw new MdmRepositoryIOException(false, getHandle(), e);
        }
    }
}