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Modify git HEAD on default branch change

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This commit is contained in:
René Pfeuffer
2018-12-13 18:32:20 +01:00
parent 360cba6c50
commit c2d872bd59
3 changed files with 276 additions and 0 deletions
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101
scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/GitHeadModifier.java Normal file
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/**
* Copyright (c) 2014, Sebastian Sdorra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of SCM-Manager; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.repository;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefUpdate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import java.io.File;
import java.io.IOException;
import java.util.Objects;
/**
* The GitHeadModifier is able to modify the head of a git repository.
*
* @author Sebastian Sdorra
* @since 1.61
*/
public class GitHeadModifier {
private static final Logger LOG = LoggerFactory.getLogger(GitHeadModifier.class);
private final GitRepositoryHandler repositoryHandler;
@Inject
public GitHeadModifier(GitRepositoryHandler repositoryHandler) {
this.repositoryHandler = repositoryHandler;
}
/**
* Ensures that the repositories head points to the given branch. The method will return {@code false} if the
* repositories head points already to the given branch.
*
* @param repository repository to modify
* @param newHead branch which should be the new head of the repository
*
* @return {@code true} if the head has changed
*/
public boolean ensure(Repository repository, String newHead) {
try (org.eclipse.jgit.lib.Repository gitRepository = open(repository)) {
String currentHead = resolve(gitRepository);
if (!Objects.equals(currentHead, newHead)) {
return modify(gitRepository, newHead);
}
} catch (IOException ex) {
LOG.warn("failed to change head of repository", ex);
}
return false;
}
private String resolve(org.eclipse.jgit.lib.Repository gitRepository) throws IOException {
Ref ref = gitRepository.getRefDatabase().getRef(Constants.HEAD);
if ( ref.isSymbolic() ) {
ref = ref.getTarget();
}
return GitUtil.getBranch(ref);
}
private boolean modify(org.eclipse.jgit.lib.Repository gitRepository, String newHead) throws IOException {
RefUpdate refUpdate = gitRepository.getRefDatabase().newUpdate(Constants.HEAD, true);
refUpdate.setForceUpdate(true);
RefUpdate.Result result = refUpdate.link(Constants.R_HEADS + newHead);
return result == RefUpdate.Result.FORCED;
}
private org.eclipse.jgit.lib.Repository open(Repository repository) throws IOException {
File directory = repositoryHandler.getDirectory(repository.getId());
return GitUtil.open(directory);
}
}

75
scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/GitRepositoryModifyListener.java Normal file
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/**
* Copyright (c) 2014, Sebastian Sdorra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of SCM-Manager; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.repository;
import com.github.legman.Subscribe;
import sonia.scm.EagerSingleton;
import sonia.scm.api.v2.resources.GitRepositoryConfigChangedEvent;
import sonia.scm.api.v2.resources.GitRepositoryConfigStoreProvider;
import sonia.scm.plugin.Extension;
import javax.inject.Inject;
/**
* Repository listener which handles git related repository events.
*
* @author Sebastian Sdorra
* @since 1.50
*/
@Extension
@EagerSingleton
public class GitRepositoryModifyListener {
private final GitHeadModifier headModifier;
private final GitRepositoryConfigStoreProvider storeProvider;
@Inject
public GitRepositoryModifyListener(GitHeadModifier headModifier, GitRepositoryConfigStoreProvider storeProvider) {
this.headModifier = headModifier;
this.storeProvider = storeProvider;
}
/**
* Receives {@link RepositoryModificationEvent} and fires a {@link ClearRepositoryCacheEvent} if
* the default branch of a git repository was modified.
*
* @param event repository modification event
*/
@Subscribe
public void handleEvent(GitRepositoryConfigChangedEvent event){
Repository repository = event.getRepository();
String defaultBranch = storeProvider.get(repository).get().getDefaultBranch();
if (defaultBranch != null) {
headModifier.ensure(repository, defaultBranch);
}
}
}

100
scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/GitHeadModifierTest.java Normal file
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/**
* Copyright (c) 2014, Sebastian Sdorra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of SCM-Manager; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.repository;
import com.google.common.base.Charsets;
import com.google.common.io.Files;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import java.io.File;
import java.io.IOException;
import static org.junit.Assert.*;
import static org.mockito.Mockito.when;
@RunWith(MockitoJUnitRunner.class)
public class GitHeadModifierTest {
@Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
@Mock
private GitRepositoryHandler repositoryHandler;
@InjectMocks
private GitHeadModifier modifier;
@Test
public void testEnsure() throws IOException, GitAPIException {
Repository repository = RepositoryTestData.createHeartOfGold("git");
File headFile = create(repository, "master");
boolean result = modifier.ensure(repository, "develop");
assertEquals("ref: refs/heads/develop", Files.readFirstLine(headFile, Charsets.UTF_8));
assertTrue(result);
}
@Test
public void testEnsureWithSameBranch() throws IOException, GitAPIException {
Repository repository = RepositoryTestData.createHeartOfGold("git");
create(repository, "develop");
boolean result = modifier.ensure(repository, "develop");
assertFalse(result);
}
private File create(Repository repository, String head) throws IOException, GitAPIException {
File directory = temporaryFolder.newFolder();
Git.init()
.setBare(true)
.setDirectory(directory)
.call();
File headFile = new File(directory, "HEAD");
Files.write(String.format("ref: refs/heads/%s\n", head), headFile, Charsets.UTF_8);
when(repositoryHandler.getDirectory(repository.getId())).thenReturn(directory);
return headFile;
}
}