/**
* Return a list of 'tip' branches (I.E. branches that aren't included entirely within another
* branch).
*
* @param git
* @return
*/
public Collection<Revision> filterTipBranches(Collection<Revision> revisions) {
// If we have 3 branches that we might want to build
// ----A--.---.--- B
// \-----C
// we only want (B) and (C), as (A) is an ancestor (old).
List<Revision> l = new ArrayList<Revision>(revisions);
OUTER:
for (int i = 0; i < l.size(); i++) {
for (int j = i + 1; j < l.size(); j++) {
Revision ri = l.get(i);
Revision rj = l.get(j);
ObjectId commonAncestor = git.mergeBase(ri.getSha1(), rj.getSha1());
if (commonAncestor == null) {
continue;
}
if (commonAncestor.equals(ri.getSha1())) {
LOGGER.fine("filterTipBranches: " + rj + " subsumes " + ri);
l.remove(i);
i--;
continue OUTER;
}
if (commonAncestor.equals(rj.getSha1())) {
LOGGER.fine("filterTipBranches: " + ri + " subsumes " + rj);
l.remove(j);
j--;
}
}
}
return l;
}
public CodeReviewCommit createCherryPickFromCommit(
Repository repo,
ObjectInserter inserter,
RevCommit mergeTip,
RevCommit originalCommit,
PersonIdent cherryPickCommitterIdent,
String commitMsg,
CodeReviewRevWalk rw)
throws MissingObjectException, IncorrectObjectTypeException, IOException,
MergeIdenticalTreeException, MergeConflictException {
final ThreeWayMerger m = newThreeWayMerger(repo, inserter);
m.setBase(originalCommit.getParent(0));
if (m.merge(mergeTip, originalCommit)) {
ObjectId tree = m.getResultTreeId();
if (tree.equals(mergeTip.getTree())) {
throw new MergeIdenticalTreeException("identical tree");
}
CommitBuilder mergeCommit = new CommitBuilder();
mergeCommit.setTreeId(tree);
mergeCommit.setParentId(mergeTip);
mergeCommit.setAuthor(originalCommit.getAuthorIdent());
mergeCommit.setCommitter(cherryPickCommitterIdent);
mergeCommit.setMessage(commitMsg);
return rw.parseCommit(commit(inserter, mergeCommit));
} else {
throw new MergeConflictException("merge conflict");
}
}
/**
* Adds a set of refs to the set of packed-refs. Only non-symbolic refs are added. If a ref with
* the given name already existed in packed-refs it is updated with the new value. Each loose ref
* which was added to the packed-ref file is deleted. If a given ref can't be locked it will not
* be added to the pack file.
*
* @param refs the refs to be added. Must be fully qualified.
* @throws IOException
*/
public void pack(List<String> refs) throws IOException {
if (refs.size() == 0) return;
FS fs = parent.getFS();
// Lock the packed refs file and read the content
LockFile lck = new LockFile(packedRefsFile);
if (!lck.lock())
throw new IOException(MessageFormat.format(JGitText.get().cannotLock, packedRefsFile));
try {
final PackedRefList packed = getPackedRefs();
RefList<Ref> cur = readPackedRefs();
// Iterate over all refs to be packed
for (String refName : refs) {
Ref ref = readRef(refName, cur);
if (ref.isSymbolic()) continue; // can't pack symbolic refs
// Add/Update it to packed-refs
int idx = cur.find(refName);
if (idx >= 0) cur = cur.set(idx, peeledPackedRef(ref));
else cur = cur.add(idx, peeledPackedRef(ref));
}
// The new content for packed-refs is collected. Persist it.
commitPackedRefs(lck, cur, packed);
// Now delete the loose refs which are now packed
for (String refName : refs) {
// Lock the loose ref
File refFile = fileFor(refName);
if (!fs.exists(refFile)) continue;
LockFile rLck = new LockFile(refFile);
if (!rLck.lock()) continue;
try {
LooseRef currentLooseRef = scanRef(null, refName);
if (currentLooseRef == null || currentLooseRef.isSymbolic()) continue;
Ref packedRef = cur.get(refName);
ObjectId clr_oid = currentLooseRef.getObjectId();
if (clr_oid != null && clr_oid.equals(packedRef.getObjectId())) {
RefList<LooseRef> curLoose, newLoose;
do {
curLoose = looseRefs.get();
int idx = curLoose.find(refName);
if (idx < 0) break;
newLoose = curLoose.remove(idx);
} while (!looseRefs.compareAndSet(curLoose, newLoose));
int levels = levelsIn(refName) - 2;
delete(refFile, levels, rLck);
}
} finally {
rLck.unlock();
}
}
// Don't fire refsChanged. The refs have not change, only their
// storage.
} finally {
lck.unlock();
}
}
public List<Tag> getTagsOnCommit(final String revName) throws GitException, IOException {
final Repository db = getRepository();
final ObjectId commit = db.resolve(revName);
final List<Tag> ret = new ArrayList<Tag>();
for (final Map.Entry<String, Ref> tag : db.getTags().entrySet()) {
final ObjectId tagId = tag.getValue().getObjectId();
if (commit.equals(tagId)) ret.add(new Tag(tag.getKey(), tagId));
}
return ret;
}
/**
* Load the configuration as a Git text style configuration file.
*
* <p>If the file does not exist, this configuration is cleared, and thus behaves the same as
* though the file exists, but is empty.
*
* @throws IOException the file could not be read (but does exist).
* @throws ConfigInvalidException the file is not a properly formatted configuration file.
*/
@Override
public void load() throws IOException, ConfigInvalidException {
final FileSnapshot oldSnapshot = snapshot;
final FileSnapshot newSnapshot = FileSnapshot.save(getFile());
try {
final byte[] in = IO.readFully(getFile());
final ObjectId newHash = hash(in);
if (hash.equals(newHash)) {
if (oldSnapshot.equals(newSnapshot)) oldSnapshot.setClean(newSnapshot);
else snapshot = newSnapshot;
} else {
final String decoded;
if (in.length >= 3
&& in[0] == (byte) 0xEF
&& in[1] == (byte) 0xBB
&& in[2] == (byte) 0xBF) {
decoded = RawParseUtils.decode(RawParseUtils.UTF8_CHARSET, in, 3, in.length);
utf8Bom = true;
} else {
decoded = RawParseUtils.decode(in);
}
fromText(decoded);
snapshot = newSnapshot;
hash = newHash;
}
} catch (FileNotFoundException noFile) {
clear();
snapshot = newSnapshot;
} catch (IOException e) {
final IOException e2 =
new IOException(MessageFormat.format(JGitText.get().cannotReadFile, getFile()));
e2.initCause(e);
throw e2;
} catch (ConfigInvalidException e) {
throw new ConfigInvalidException(
MessageFormat.format(JGitText.get().cannotReadFile, getFile()), e);
}
}
LooseRef scanRef(LooseRef ref, String name) throws IOException {
final File path = fileFor(name);
FileSnapshot currentSnapshot = null;
if (ref != null) {
currentSnapshot = ref.getSnapShot();
if (!currentSnapshot.isModified(path)) return ref;
name = ref.getName();
}
final int limit = 4096;
final byte[] buf;
FileSnapshot otherSnapshot = FileSnapshot.save(path);
try {
buf = IO.readSome(path, limit);
} catch (FileNotFoundException noFile) {
if (path.exists() && path.isFile()) {
throw noFile;
}
return null; // doesn't exist or no file; not a reference.
}
int n = buf.length;
if (n == 0) return null; // empty file; not a reference.
if (isSymRef(buf, n)) {
if (n == limit) return null; // possibly truncated ref
// trim trailing whitespace
while (0 < n && Character.isWhitespace(buf[n - 1])) n--;
if (n < 6) {
String content = RawParseUtils.decode(buf, 0, n);
throw new IOException(MessageFormat.format(JGitText.get().notARef, name, content));
}
final String target = RawParseUtils.decode(buf, 5, n);
if (ref != null && ref.isSymbolic() && ref.getTarget().getName().equals(target)) {
assert (currentSnapshot != null);
currentSnapshot.setClean(otherSnapshot);
return ref;
}
return newSymbolicRef(otherSnapshot, name, target);
}
if (n < OBJECT_ID_STRING_LENGTH)
return null; // impossibly short object identifier; not a reference.
final ObjectId id;
try {
id = ObjectId.fromString(buf, 0);
if (ref != null && !ref.isSymbolic() && id.equals(ref.getTarget().getObjectId())) {
assert (currentSnapshot != null);
currentSnapshot.setClean(otherSnapshot);
return ref;
}
} catch (IllegalArgumentException notRef) {
while (0 < n && Character.isWhitespace(buf[n - 1])) n--;
String content = RawParseUtils.decode(buf, 0, n);
IOException ioException =
new IOException(MessageFormat.format(JGitText.get().notARef, name, content));
ioException.initCause(notRef);
throw ioException;
}
return new LooseUnpeeled(otherSnapshot, name, id);
}
void processEntry(TreeEntry h, TreeEntry m, Entry i) throws IOException {
ObjectId iId = (i == null ? null : i.getObjectId());
ObjectId mId = (m == null ? null : m.getId());
ObjectId hId = (h == null ? null : h.getId());
String name = (i != null ? i.getName() : (h != null ? h.getFullName() : m.getFullName()));
if (i == null) {
/*
I (index) H M Result
-------------------------------------------------------
0 nothing nothing nothing (does not happen)
1 nothing nothing exists use M
2 nothing exists nothing remove path from index
3 nothing exists exists use M */
if (h == null) {
updated.put(name, mId);
} else if (m == null) {
removed.add(name);
} else {
updated.put(name, mId);
}
} else if (h == null) {
/*
clean I==H I==M H M Result
-----------------------------------------------------
4 yes N/A N/A nothing nothing keep index
5 no N/A N/A nothing nothing keep index
6 yes N/A yes nothing exists keep index
7 no N/A yes nothing exists keep index
8 yes N/A no nothing exists fail
9 no N/A no nothing exists fail */
if (m == null || mId.equals(iId)) {
if (hasParentBlob(merge, name)) {
if (i.isModified(root, true)) {
conflicts.add(name);
} else {
removed.add(name);
}
}
} else {
conflicts.add(name);
}
} else if (m == null) {
/*
10 yes yes N/A exists nothing remove path from index
11 no yes N/A exists nothing fail
12 yes no N/A exists nothing fail
13 no no N/A exists nothing fail
*/
if (hId.equals(iId)) {
if (i.isModified(root, true)) {
conflicts.add(name);
} else {
removed.add(name);
}
} else {
conflicts.add(name);
}
} else {
if (!hId.equals(mId) && !hId.equals(iId) && !mId.equals(iId)) {
conflicts.add(name);
} else if (hId.equals(iId) && !mId.equals(iId)) {
if (i.isModified(root, true)) conflicts.add(name);
else updated.put(name, mId);
}
}
}
private static RawText getRawText(ObjectId id, ObjectReader reader) throws IOException {
if (id.equals(ObjectId.zeroId())) return new RawText(new byte[] {});
return new RawText(reader.open(id, OBJ_BLOB).getCachedBytes());
}
/**
* Executes the {@code commit} command with all the options and parameters collected by the setter
* methods of this class. Each instance of this class should only be used for one invocation of
* the command (means: one call to {@link #call()})
*
* @return a {@link RevCommit} object representing the successful commit.
* @throws NoHeadException when called on a git repo without a HEAD reference
* @throws NoMessageException when called without specifying a commit message
* @throws UnmergedPathsException when the current index contained unmerged paths (conflicts)
* @throws ConcurrentRefUpdateException when HEAD or branch ref is updated concurrently by someone
* else
* @throws WrongRepositoryStateException when repository is not in the right state for committing
* @throws AbortedByHookException if there are either pre-commit or commit-msg hooks present in
* the repository and one of them rejects the commit.
*/
public RevCommit call()
throws GitAPIException, NoHeadException, NoMessageException, UnmergedPathsException,
ConcurrentRefUpdateException, WrongRepositoryStateException, AbortedByHookException {
checkCallable();
Collections.sort(only);
try (RevWalk rw = new RevWalk(repo)) {
RepositoryState state = repo.getRepositoryState();
if (!state.canCommit())
throw new WrongRepositoryStateException(
MessageFormat.format(JGitText.get().cannotCommitOnARepoWithState, state.name()));
if (!noVerify) {
Hooks.preCommit(repo, hookOutRedirect.get(PreCommitHook.NAME)).call();
}
processOptions(state, rw);
if (all && !repo.isBare()) {
try (Git git = new Git(repo)) {
git.add()
.addFilepattern(".") // $NON-NLS-1$
.setUpdate(true)
.call();
} catch (NoFilepatternException e) {
// should really not happen
throw new JGitInternalException(e.getMessage(), e);
}
}
Ref head = repo.exactRef(Constants.HEAD);
if (head == null)
throw new NoHeadException(JGitText.get().commitOnRepoWithoutHEADCurrentlyNotSupported);
// determine the current HEAD and the commit it is referring to
ObjectId headId = repo.resolve(Constants.HEAD + "^{commit}"); // $NON-NLS-1$
if (headId == null && amend)
throw new WrongRepositoryStateException(JGitText.get().commitAmendOnInitialNotPossible);
if (headId != null)
if (amend) {
RevCommit previousCommit = rw.parseCommit(headId);
for (RevCommit p : previousCommit.getParents()) parents.add(p.getId());
if (author == null) author = previousCommit.getAuthorIdent();
} else {
parents.add(0, headId);
}
if (!noVerify) {
message =
Hooks.commitMsg(repo, hookOutRedirect.get(CommitMsgHook.NAME))
.setCommitMessage(message)
.call();
}
// lock the index
DirCache index = repo.lockDirCache();
try (ObjectInserter odi = repo.newObjectInserter()) {
if (!only.isEmpty()) index = createTemporaryIndex(headId, index, rw);
// Write the index as tree to the object database. This may
// fail for example when the index contains unmerged paths
// (unresolved conflicts)
ObjectId indexTreeId = index.writeTree(odi);
if (insertChangeId) insertChangeId(indexTreeId);
// Check for empty commits
if (headId != null && !allowEmpty.booleanValue()) {
RevCommit headCommit = rw.parseCommit(headId);
headCommit.getTree();
if (indexTreeId.equals(headCommit.getTree())) {
throw new EmtpyCommitException(JGitText.get().emptyCommit);
}
}
// Create a Commit object, populate it and write it
CommitBuilder commit = new CommitBuilder();
commit.setCommitter(committer);
commit.setAuthor(author);
commit.setMessage(message);
commit.setParentIds(parents);
commit.setTreeId(indexTreeId);
ObjectId commitId = odi.insert(commit);
odi.flush();
RevCommit revCommit = rw.parseCommit(commitId);
RefUpdate ru = repo.updateRef(Constants.HEAD);
ru.setNewObjectId(commitId);
if (!useDefaultReflogMessage) {
ru.setRefLogMessage(reflogComment, false);
} else {
String prefix =
amend
? "commit (amend): " //$NON-NLS-1$
: parents.size() == 0
? "commit (initial): " //$NON-NLS-1$
: "commit: "; //$NON-NLS-1$
ru.setRefLogMessage(prefix + revCommit.getShortMessage(), false);
}
if (headId != null) ru.setExpectedOldObjectId(headId);
else ru.setExpectedOldObjectId(ObjectId.zeroId());
Result rc = ru.forceUpdate();
switch (rc) {
case NEW:
case FORCED:
case FAST_FORWARD:
{
setCallable(false);
if (state == RepositoryState.MERGING_RESOLVED || isMergeDuringRebase(state)) {
// Commit was successful. Now delete the files
// used for merge commits
repo.writeMergeCommitMsg(null);
repo.writeMergeHeads(null);
} else if (state == RepositoryState.CHERRY_PICKING_RESOLVED) {
repo.writeMergeCommitMsg(null);
repo.writeCherryPickHead(null);
} else if (state == RepositoryState.REVERTING_RESOLVED) {
repo.writeMergeCommitMsg(null);
repo.writeRevertHead(null);
}
Hooks.postCommit(repo, hookOutRedirect.get(PostCommitHook.NAME)).call();
return revCommit;
}
case REJECTED:
case LOCK_FAILURE:
throw new ConcurrentRefUpdateException(
JGitText.get().couldNotLockHEAD, ru.getRef(), rc);
default:
throw new JGitInternalException(
MessageFormat.format(
JGitText.get().updatingRefFailed, Constants.HEAD, commitId.toString(), rc));
}
} finally {
index.unlock();
}
} catch (UnmergedPathException e) {
throw new UnmergedPathsException(e);
} catch (IOException e) {
throw new JGitInternalException(
JGitText.get().exceptionCaughtDuringExecutionOfCommitCommand, e);
}
}
/**
* Compares whether two pairs of ObjectId and FileMode are equal.
*
* @param id1
* @param mode1
* @param id2
* @param mode2
* @return <code>true</code> if FileModes and ObjectIds are equal. <code>false</code> otherwise
*/
private boolean equalIdAndMode(ObjectId id1, FileMode mode1, ObjectId id2, FileMode mode2) {
if (!mode1.equals(mode2)) return false;
return id1 != null ? id1.equals(id2) : id2 == null;
}