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/*
* Copyright 2012 gitblit.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 com.gitblit.build;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import org.eclipse.jgit.api.errors.ConcurrentRefUpdateException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.dircache.DirCache;
import org.eclipse.jgit.dircache.DirCacheBuilder;
import org.eclipse.jgit.dircache.DirCacheEntry;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.lib.CommitBuilder;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.RefUpdate.Result;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryCache.FileKey;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.storage.file.FileRepository;
import org.eclipse.jgit.treewalk.CanonicalTreeParser;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.util.FS;
import com.beust.jcommander.JCommander;
import com.beust.jcommander.Parameter;
import com.beust.jcommander.ParameterException;
import com.beust.jcommander.Parameters;
import com.gitblit.models.RefModel;
import com.gitblit.utils.JGitUtils;
import com.gitblit.utils.StringUtils;
/**
* Creates or updates a gh-pages branch with the specified content.
*
* @author James Moger
*
*/
public class BuildGhPages {
public static void main(String[] args) {
Params params = new Params();
JCommander jc = new JCommander(params);
try {
jc.parse(args);
} catch (ParameterException t) {
System.err.println(t.getMessage());
jc.usage();
}
File source = new File(params.sourceFolder);
String ghpages = "refs/heads/gh-pages";
try {
File gitDir = FileKey.resolve(new File(params.repositoryFolder), FS.DETECTED);
Repository repository = new FileRepository(gitDir);
RefModel issuesBranch = JGitUtils.getPagesBranch(repository);
if (issuesBranch == null) {
JGitUtils.createOrphanBranch(repository, "gh-pages", null);
}
System.out.println("Updating gh-pages branch...");
ObjectId headId = repository.resolve(ghpages + "^{commit}");
ObjectInserter odi = repository.newObjectInserter();
try {
// Create the in-memory index of the new/updated issue.
DirCache index = createIndex(repository, headId, source, params.obliterate);
ObjectId indexTreeId = index.writeTree(odi);
// Create a commit object
PersonIdent author = new PersonIdent("Gitblit", "gitblit@localhost");
CommitBuilder commit = new CommitBuilder();
commit.setAuthor(author);
commit.setCommitter(author);
commit.setEncoding(Constants.CHARACTER_ENCODING);
commit.setMessage("updated pages");
commit.setParentId(headId);
commit.setTreeId(indexTreeId);
// Insert the commit into the repository
ObjectId commitId = odi.insert(commit);
odi.flush();
RevWalk revWalk = new RevWalk(repository);
try {
RevCommit revCommit = revWalk.parseCommit(commitId);
RefUpdate ru = repository.updateRef(ghpages);
ru.setNewObjectId(commitId);
ru.setExpectedOldObjectId(headId);
ru.setRefLogMessage("commit: " + revCommit.getShortMessage(), false);
Result rc = ru.forceUpdate();
switch (rc) {
case NEW:
case FORCED:
case FAST_FORWARD:
break;
case REJECTED:
case LOCK_FAILURE:
throw new ConcurrentRefUpdateException(JGitText.get().couldNotLockHEAD,
ru.getRef(), rc);
default:
throw new JGitInternalException(MessageFormat.format(
JGitText.get().updatingRefFailed, ghpages, commitId.toString(), rc));
}
} finally {
revWalk.release();
}
} finally {
odi.release();
}
System.out.println("gh-pages updated.");
} catch (Throwable t) {
t.printStackTrace();
}
}
/**
* Creates an in-memory index of the issue change.
*
* @param repo
* @param headId
* @param sourceFolder
* @param obliterate
* if true the source folder tree is used as the new tree for
* gh-pages and non-existent files are considered deleted
* @return an in-memory index
* @throws IOException
*/
private static DirCache createIndex(Repository repo, ObjectId headId, File sourceFolder,
boolean obliterate) throws IOException {
DirCache inCoreIndex = DirCache.newInCore();
DirCacheBuilder dcBuilder = inCoreIndex.builder();
ObjectInserter inserter = repo.newObjectInserter();
try {
// Add all files to the temporary index
Set<String> ignorePaths = new TreeSet<String>();
List<File> files = listFiles(sourceFolder);
for (File file : files) {
// create an index entry for the file
final DirCacheEntry dcEntry = new DirCacheEntry(StringUtils.getRelativePath(
sourceFolder.getPath(), file.getPath()));
dcEntry.setLength(file.length());
dcEntry.setLastModified(file.lastModified());
dcEntry.setFileMode(FileMode.REGULAR_FILE);
// add this entry to the ignore paths set
ignorePaths.add(dcEntry.getPathString());
// insert object
InputStream inputStream = new FileInputStream(file);
try {
dcEntry.setObjectId(inserter.insert(Constants.OBJ_BLOB, file.length(),
inputStream));
} finally {
inputStream.close();
}
// add to temporary in-core index
dcBuilder.add(dcEntry);
}
if (!obliterate) {
// Traverse HEAD to add all other paths
TreeWalk treeWalk = new TreeWalk(repo);
int hIdx = -1;
if (headId != null)
hIdx = treeWalk.addTree(new RevWalk(repo).parseTree(headId));
treeWalk.setRecursive(true);
while (treeWalk.next()) {
String path = treeWalk.getPathString();
CanonicalTreeParser hTree = null;
if (hIdx != -1)
hTree = treeWalk.getTree(hIdx, CanonicalTreeParser.class);
if (!ignorePaths.contains(path)) {
// add entries from HEAD for all other paths
if (hTree != null) {
// create a new DirCacheEntry with data retrieved
// from
// HEAD
final DirCacheEntry dcEntry = new DirCacheEntry(path);
dcEntry.setObjectId(hTree.getEntryObjectId());
dcEntry.setFileMode(hTree.getEntryFileMode());
// add to temporary in-core index
dcBuilder.add(dcEntry);
}
}
}
// release the treewalk
treeWalk.release();
}
// finish temporary in-core index used for this commit
dcBuilder.finish();
} finally {
inserter.release();
}
return inCoreIndex;
}
private static List<File> listFiles(File folder) {
List<File> files = new ArrayList<File>();
for (File file : folder.listFiles()) {
if (file.isDirectory()) {
files.addAll(listFiles(file));
} else {
files.add(file);
}
}
return files;
}
/**
* JCommander Parameters class for BuildGhPages.
*/
@Parameters(separators = " ")
private static class Params {
@Parameter(names = { "--sourceFolder" }, description = "Source folder for pages", required = true)
public String sourceFolder;
@Parameter(names = { "--repository" }, description = "Repository folder", required = true)
public String repositoryFolder;
@Parameter(names = { "--obliterate" }, description = "Replace gh-pages tree with only the content in your sourcefolder")
public boolean obliterate;
}
}
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