@Override
protected void doGetHtml(HttpServletRequest req, HttpServletResponse res) throws IOException {
MarkdownConfig cfg = MarkdownConfig.get(getAccess(req).getConfig());
if (!cfg.render) {
res.setStatus(SC_NOT_FOUND);
return;
}
GitilesView view = ViewFilter.getView(req);
Repository repo = ServletUtils.getRepository(req);
try (RevWalk rw = new RevWalk(repo)) {
ObjectReader reader = rw.getObjectReader();
String path = view.getPathPart();
RevTree root;
try {
root = rw.parseTree(view.getRevision().getId());
} catch (IncorrectObjectTypeException e) {
res.setStatus(SC_NOT_FOUND);
return;
}
MarkdownFile srcmd = findFile(rw, root, path);
if (srcmd == null) {
res.setStatus(SC_NOT_FOUND);
return;
}
MarkdownFile navmd = findFile(rw, root, NAVBAR_MD);
String curEtag = etag(srcmd, navmd);
if (etagMatch(req, curEtag)) {
res.setStatus(SC_NOT_MODIFIED);
return;
}
view = view.toBuilder().setPathPart(srcmd.path).build();
try {
srcmd.read(reader, cfg);
if (navmd != null) {
navmd.read(reader, cfg);
}
} catch (LargeObjectException.ExceedsLimit errBig) {
fileTooBig(res, view, errBig);
return;
} catch (IOException err) {
readError(res, view, err);
return;
}
MarkdownToHtml.Builder fmt =
MarkdownToHtml.builder()
.setConfig(cfg)
.setGitilesView(view)
.setRequestUri(req.getRequestURI())
.setReader(reader)
.setRootTree(root);
res.setHeader(HttpHeaders.ETAG, curEtag);
showDoc(req, res, view, cfg, fmt, navmd, srcmd);
}
}
private static AnyObjectId asTree(ObjectReader or, AnyObjectId treeish)
throws MissingObjectException, IncorrectObjectTypeException, IOException {
if (treeish instanceof RevTree) return treeish;
if (treeish instanceof RevCommit && ((RevCommit) treeish).getTree() != null)
return ((RevCommit) treeish).getTree();
try (RevWalk rw = new RevWalk(or)) {
return rw.parseTree(treeish).getId();
}
}
/**
* Checks if a file with the given path exists in the HEAD tree
*
* @param path
* @return true if the file exists
* @throws IOException
*/
private boolean inHead(String path) throws IOException {
ObjectId headId = db.resolve(Constants.HEAD);
RevWalk rw = new RevWalk(db);
TreeWalk tw = null;
try {
tw = TreeWalk.forPath(db, path, rw.parseTree(headId));
return tw != null;
} finally {
rw.release();
rw.dispose();
if (tw != null) tw.release();
}
}
private static DirCache readTree(final Repository pdb, final Ref branch)
throws MissingObjectException, IncorrectObjectTypeException, IOException {
try (RevWalk rw = new RevWalk(pdb)) {
final DirCache dc = DirCache.newInCore();
final DirCacheBuilder b = dc.builder();
b.addTree(
new byte[0], // no prefix path
DirCacheEntry.STAGE_0, // standard stage
pdb.newObjectReader(),
rw.parseTree(branch.getObjectId()));
b.finish();
return dc;
}
}
/**
* Merge together two or more tree-ish objects.
*
* <p>Any tree-ish may be supplied as inputs. Commits and/or tags pointing at trees or commits may
* be passed as input objects.
*
* @param tips source trees to be combined together. The merge base is not included in this set.
* @return true if the merge was completed without conflicts; false if the merge strategy cannot
* handle this merge or there were conflicts preventing it from automatically resolving all
* paths.
* @throws IncorrectObjectTypeException one of the input objects is not a commit, but the strategy
* requires it to be a commit.
* @throws IOException one or more sources could not be read, or outputs could not be written to
* the Repository.
*/
public boolean merge(final AnyObjectId[] tips) throws IOException {
sourceObjects = new RevObject[tips.length];
for (int i = 0; i < tips.length; i++) sourceObjects[i] = walk.parseAny(tips[i]);
sourceCommits = new RevCommit[sourceObjects.length];
for (int i = 0; i < sourceObjects.length; i++) {
try {
sourceCommits[i] = walk.parseCommit(sourceObjects[i]);
} catch (IncorrectObjectTypeException err) {
sourceCommits[i] = null;
}
}
sourceTrees = new RevTree[sourceObjects.length];
for (int i = 0; i < sourceObjects.length; i++)
sourceTrees[i] = walk.parseTree(sourceObjects[i]);
return mergeImpl();
}
/**
* Determine the differences between two trees.
*
* <p>No output is created, instead only the file paths that are different are returned. Callers
* may choose to format these paths themselves, or convert them into {@link FileHeader} instances
* with a complete edit list by calling {@link #toFileHeader(DiffEntry)}.
*
* @param a the old (or previous) side.
* @param b the new (or updated) side.
* @return the paths that are different.
* @throws IOException trees cannot be read or file contents cannot be read.
*/
public List<DiffEntry> scan(AnyObjectId a, AnyObjectId b) throws IOException {
assertHaveRepository();
RevWalk rw = new RevWalk(reader);
return scan(rw.parseTree(a), rw.parseTree(b));
}
private DirCache createTemporaryIndex(ObjectId headId, DirCache index, RevWalk rw)
throws IOException {
ObjectInserter inserter = null;
// get DirCacheBuilder for existing index
DirCacheBuilder existingBuilder = index.builder();
// get DirCacheBuilder for newly created in-core index to build a
// temporary index for this commit
DirCache inCoreIndex = DirCache.newInCore();
DirCacheBuilder tempBuilder = inCoreIndex.builder();
onlyProcessed = new boolean[only.size()];
boolean emptyCommit = true;
try (TreeWalk treeWalk = new TreeWalk(repo)) {
treeWalk.setOperationType(OperationType.CHECKIN_OP);
int dcIdx = treeWalk.addTree(new DirCacheBuildIterator(existingBuilder));
FileTreeIterator fti = new FileTreeIterator(repo);
fti.setDirCacheIterator(treeWalk, 0);
int fIdx = treeWalk.addTree(fti);
int hIdx = -1;
if (headId != null) hIdx = treeWalk.addTree(rw.parseTree(headId));
treeWalk.setRecursive(true);
String lastAddedFile = null;
while (treeWalk.next()) {
String path = treeWalk.getPathString();
// check if current entry's path matches a specified path
int pos = lookupOnly(path);
CanonicalTreeParser hTree = null;
if (hIdx != -1) hTree = treeWalk.getTree(hIdx, CanonicalTreeParser.class);
DirCacheIterator dcTree = treeWalk.getTree(dcIdx, DirCacheIterator.class);
if (pos >= 0) {
// include entry in commit
FileTreeIterator fTree = treeWalk.getTree(fIdx, FileTreeIterator.class);
// check if entry refers to a tracked file
boolean tracked = dcTree != null || hTree != null;
if (!tracked) continue;
// for an unmerged path, DirCacheBuildIterator will yield 3
// entries, we only want to add one
if (path.equals(lastAddedFile)) continue;
lastAddedFile = path;
if (fTree != null) {
// create a new DirCacheEntry with data retrieved from
// disk
final DirCacheEntry dcEntry = new DirCacheEntry(path);
long entryLength = fTree.getEntryLength();
dcEntry.setLength(entryLength);
dcEntry.setLastModified(fTree.getEntryLastModified());
dcEntry.setFileMode(fTree.getIndexFileMode(dcTree));
boolean objectExists =
(dcTree != null && fTree.idEqual(dcTree))
|| (hTree != null && fTree.idEqual(hTree));
if (objectExists) {
dcEntry.setObjectId(fTree.getEntryObjectId());
} else {
if (FileMode.GITLINK.equals(dcEntry.getFileMode()))
dcEntry.setObjectId(fTree.getEntryObjectId());
else {
// insert object
if (inserter == null) inserter = repo.newObjectInserter();
long contentLength = fTree.getEntryContentLength();
InputStream inputStream = fTree.openEntryStream();
try {
dcEntry.setObjectId(
inserter.insert(Constants.OBJ_BLOB, contentLength, inputStream));
} finally {
inputStream.close();
}
}
}
// add to existing index
existingBuilder.add(dcEntry);
// add to temporary in-core index
tempBuilder.add(dcEntry);
if (emptyCommit
&& (hTree == null
|| !hTree.idEqual(fTree)
|| hTree.getEntryRawMode() != fTree.getEntryRawMode()))
// this is a change
emptyCommit = false;
} else {
// if no file exists on disk, neither add it to
// index nor to temporary in-core index
if (emptyCommit && hTree != null)
// this is a change
emptyCommit = false;
}
// keep track of processed path
onlyProcessed[pos] = true;
} else {
// 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
tempBuilder.add(dcEntry);
}
// preserve existing entry in index
if (dcTree != null) existingBuilder.add(dcTree.getDirCacheEntry());
}
}
}
// there must be no unprocessed paths left at this point; otherwise an
// untracked or unknown path has been specified
for (int i = 0; i < onlyProcessed.length; i++)
if (!onlyProcessed[i])
throw new JGitInternalException(
MessageFormat.format(JGitText.get().entryNotFoundByPath, only.get(i)));
// there must be at least one change
if (emptyCommit) throw new JGitInternalException(JGitText.get().emptyCommit);
// update index
existingBuilder.commit();
// finish temporary in-core index used for this commit
tempBuilder.finish();
return inCoreIndex;
}
/**
* Open a batch of updates to the same metadata ref.
*
* <p>This allows making multiple commits to a single metadata ref, at the end of which is a
* single ref update. For batching together updates to multiple refs (each consisting of one or
* more commits against their respective refs), create the {@link MetaDataUpdate} with a {@link
* BatchRefUpdate}.
*
* <p>A ref update produced by this {@link BatchMetaDataUpdate} is only committed if there is no
* associated {@link BatchRefUpdate}. As a result, the configured ref updated event is not fired
* if there is an associated batch.
*
* @param update helper info about the update.
* @throws IOException if the update failed.
*/
public BatchMetaDataUpdate openUpdate(final MetaDataUpdate update) throws IOException {
final Repository db = update.getRepository();
reader = db.newObjectReader();
inserter = db.newObjectInserter();
final RevWalk rw = new RevWalk(reader);
final RevTree tree = revision != null ? rw.parseTree(revision) : null;
newTree = readTree(tree);
return new BatchMetaDataUpdate() {
AnyObjectId src = revision;
AnyObjectId srcTree = tree;
@Override
public void write(CommitBuilder commit) throws IOException {
write(VersionedMetaData.this, commit);
}
private boolean doSave(VersionedMetaData config, CommitBuilder commit) throws IOException {
DirCache nt = config.newTree;
ObjectReader r = config.reader;
ObjectInserter i = config.inserter;
try {
config.newTree = newTree;
config.reader = reader;
config.inserter = inserter;
return config.onSave(commit);
} catch (ConfigInvalidException e) {
throw new IOException(
"Cannot update " + getRefName() + " in " + db.getDirectory() + ": " + e.getMessage(),
e);
} finally {
config.newTree = nt;
config.reader = r;
config.inserter = i;
}
}
@Override
public void write(VersionedMetaData config, CommitBuilder commit) throws IOException {
if (!doSave(config, commit)) {
return;
}
// Reuse tree from parent commit unless there are contents in newTree or
// there is no tree for a parent commit.
ObjectId res =
newTree.getEntryCount() != 0 || srcTree == null
? newTree.writeTree(inserter)
: srcTree.copy();
if (res.equals(srcTree) && !update.allowEmpty() && (commit.getTreeId() == null)) {
// If there are no changes to the content, don't create the commit.
return;
}
// If changes are made to the DirCache and those changes are written as
// a commit and then the tree ID is set for the CommitBuilder, then
// those previous DirCache changes will be ignored and the commit's
// tree will be replaced with the ID in the CommitBuilder. The same is
// true if you explicitly set tree ID in a commit and then make changes
// to the DirCache; that tree ID will be ignored and replaced by that of
// the tree for the updated DirCache.
if (commit.getTreeId() == null) {
commit.setTreeId(res);
} else {
// In this case, the caller populated the tree without using DirCache.
res = commit.getTreeId();
}
if (src != null) {
commit.addParentId(src);
}
if (update.insertChangeId()) {
ObjectId id =
ChangeIdUtil.computeChangeId(
res,
getRevision(),
commit.getAuthor(),
commit.getCommitter(),
commit.getMessage());
commit.setMessage(ChangeIdUtil.insertId(commit.getMessage(), id));
}
src = inserter.insert(commit);
srcTree = res;
}
@Override
public RevCommit createRef(String refName) throws IOException {
if (Objects.equals(src, revision)) {
return revision;
}
return updateRef(ObjectId.zeroId(), src, refName);
}
@Override
public void removeRef(String refName) throws IOException {
RefUpdate ru = db.updateRef(refName);
ru.setForceUpdate(true);
if (revision != null) {
ru.setExpectedOldObjectId(revision);
}
RefUpdate.Result result = ru.delete();
switch (result) {
case FORCED:
update.fireGitRefUpdatedEvent(ru);
return;
case FAST_FORWARD:
case IO_FAILURE:
case LOCK_FAILURE:
case NEW:
case NOT_ATTEMPTED:
case NO_CHANGE:
case REJECTED:
case REJECTED_CURRENT_BRANCH:
case RENAMED:
default:
throw new IOException(
"Cannot delete "
+ ru.getName()
+ " in "
+ db.getDirectory()
+ ": "
+ ru.getResult());
}
}
@Override
public RevCommit commit() throws IOException {
return commitAt(revision);
}
@Override
public RevCommit commitAt(ObjectId expected) throws IOException {
if (Objects.equals(src, expected)) {
return revision;
}
return updateRef(MoreObjects.firstNonNull(expected, ObjectId.zeroId()), src, getRefName());
}
@Override
public void close() {
newTree = null;
rw.close();
if (inserter != null) {
inserter.close();
inserter = null;
}
if (reader != null) {
reader.close();
reader = null;
}
}
private RevCommit updateRef(AnyObjectId oldId, AnyObjectId newId, String refName)
throws IOException {
BatchRefUpdate bru = update.getBatch();
if (bru != null) {
bru.addCommand(new ReceiveCommand(oldId.toObjectId(), newId.toObjectId(), refName));
inserter.flush();
revision = rw.parseCommit(newId);
return revision;
}
RefUpdate ru = db.updateRef(refName);
ru.setExpectedOldObjectId(oldId);
ru.setNewObjectId(src);
ru.setRefLogIdent(update.getCommitBuilder().getAuthor());
String message = update.getCommitBuilder().getMessage();
if (message == null) {
message = "meta data update";
}
try (BufferedReader reader = new BufferedReader(new StringReader(message))) {
// read the subject line and use it as reflog message
ru.setRefLogMessage("commit: " + reader.readLine(), true);
}
inserter.flush();
RefUpdate.Result result = ru.update();
switch (result) {
case NEW:
case FAST_FORWARD:
revision = rw.parseCommit(ru.getNewObjectId());
update.fireGitRefUpdatedEvent(ru);
return revision;
case FORCED:
case IO_FAILURE:
case LOCK_FAILURE:
case NOT_ATTEMPTED:
case NO_CHANGE:
case REJECTED:
case REJECTED_CURRENT_BRANCH:
case RENAMED:
default:
throw new IOException(
"Cannot update "
+ ru.getName()
+ " in "
+ db.getDirectory()
+ ": "
+ ru.getResult());
}
}
};
}
