@Test
public void testAbbreviateOnEmptyRepository() throws IOException {
ObjectId id = id("9d5b926ed164e8ee88d3b8b1e525d699adda01ba");
assertEquals(id.abbreviate(2), reader.abbreviate(id, 2));
assertEquals(id.abbreviate(7), reader.abbreviate(id, 7));
assertEquals(id.abbreviate(8), reader.abbreviate(id, 8));
assertEquals(id.abbreviate(10), reader.abbreviate(id, 10));
assertEquals(id.abbreviate(16), reader.abbreviate(id, 16));
assertEquals(
AbbreviatedObjectId.fromObjectId(id), //
reader.abbreviate(id, OBJECT_ID_STRING_LENGTH));
Collection<ObjectId> matches;
matches = reader.resolve(reader.abbreviate(id, 8));
assertNotNull(matches);
assertEquals(0, matches.size());
matches = reader.resolve(AbbreviatedObjectId.fromObjectId(id));
assertNotNull(matches);
assertEquals(1, matches.size());
assertEquals(id, matches.iterator().next());
}
@Test
public void testAbbreviateIsActuallyUnique() throws Exception {
// This test is far more difficult. We have to manually craft
// an input that contains collisions at a particular prefix,
// but this is computationally difficult. Instead we force an
// index file to have what we want.
//
ObjectId id = id("9d5b926ed164e8ee88d3b8b1e525d699adda01ba");
byte[] idBuf = toByteArray(id);
List<PackedObjectInfo> objects = new ArrayList<PackedObjectInfo>();
for (int i = 0; i < 256; i++) {
idBuf[9] = (byte) i;
objects.add(new PackedObjectInfo(ObjectId.fromRaw(idBuf)));
}
String packName = "pack-" + id.name();
File packDir = new File(db.getObjectDatabase().getDirectory(), "pack");
File idxFile = new File(packDir, packName + ".idx");
File packFile = new File(packDir, packName + ".pack");
FileUtils.mkdir(packDir, true);
OutputStream dst = new SafeBufferedOutputStream(new FileOutputStream(idxFile));
try {
PackIndexWriter writer = new PackIndexWriterV2(dst);
writer.write(objects, new byte[OBJECT_ID_LENGTH]);
} finally {
dst.close();
}
new FileOutputStream(packFile).close();
assertEquals(id.abbreviate(20), reader.abbreviate(id, 2));
AbbreviatedObjectId abbrev8 = id.abbreviate(8);
Collection<ObjectId> matches = reader.resolve(abbrev8);
assertNotNull(matches);
assertEquals(objects.size(), matches.size());
for (PackedObjectInfo info : objects)
assertTrue("contains " + info.name(), matches.contains(info));
try {
db.resolve(abbrev8.name());
fail("did not throw AmbiguousObjectException");
} catch (AmbiguousObjectException err) {
assertEquals(abbrev8, err.getAbbreviatedObjectId());
matches = err.getCandidates();
assertNotNull(matches);
assertEquals(objects.size(), matches.size());
for (PackedObjectInfo info : objects)
assertTrue("contains " + info.name(), matches.contains(info));
}
assertEquals(id, db.resolve(id.abbreviate(20).name()));
}
@Test
public void testAbbreviateLooseBlob() throws Exception {
ObjectId id = test.blob("test");
assertEquals(id.abbreviate(2), reader.abbreviate(id, 2));
assertEquals(id.abbreviate(7), reader.abbreviate(id, 7));
assertEquals(id.abbreviate(8), reader.abbreviate(id, 8));
assertEquals(id.abbreviate(10), reader.abbreviate(id, 10));
assertEquals(id.abbreviate(16), reader.abbreviate(id, 16));
Collection<ObjectId> matches = reader.resolve(reader.abbreviate(id, 8));
assertNotNull(matches);
assertEquals(1, matches.size());
assertEquals(id, matches.iterator().next());
assertEquals(id, db.resolve(reader.abbreviate(id, 8).name()));
}
/**
* Adds properties to the specified {@code transformer} for the current Git commit hash. The
* following properties are added to {@code transformer}:
*
* <ul>
* <li>{@code repository.commit}: The full commit hash, in lowercase hexadecimal form.
* <li>{@code repository.commit.short}: The abbreviated commit hash, which is the first {@code
* abbrevLen} hexadecimal characters of the full commit hash.
* </ul>
*
* <p>If {@code baseDir} is not currently stored in a Git repository, or if the current Git commit
* hash could not be determined, this method logs a warning and returns {@code false}.
*
* @param transformer The transformer.
* @param baseDir The base directory where versioned files are contained.
* @param abbrevLen The length of the abbreviated commit hash to create, in number of hexadecimal
* characters.
* @param log The Maven log instance.
* @return {@code true} if the commit hash was identified and the properties added to the {@code
* transformer}; otherwise, {@code false}.
*/
public static boolean addCommitProperties(
Transformer transformer, File baseDir, int abbrevLen, Log log) {
try {
RepositoryBuilder builder = new RepositoryBuilder();
Repository repository = builder.findGitDir(baseDir).readEnvironment().build();
ObjectId objectId = repository.resolve(Constants.HEAD);
if (objectId != null) {
transformer.setParameter("repository.commit", objectId.getName());
transformer.setParameter("repository.commit.short", objectId.abbreviate(abbrevLen).name());
return true;
} else {
log.warn("Could not determine current repository commit hash.");
return false;
}
} catch (IOException ex) {
log.warn("Could not determine current repository commit hash.", ex);
return false;
}
}
@Override
protected void run() throws Exception {
if (squash && ff == FastForwardMode.NO_FF) throw die(CLIText.get().cannotCombineSquashWithNoff);
// determine the merge strategy
if (strategyName != null) {
mergeStrategy = MergeStrategy.get(strategyName);
if (mergeStrategy == null)
throw die(MessageFormat.format(CLIText.get().unknownMergeStrategy, strategyName));
}
// determine the other revision we want to merge with HEAD
final Ref srcRef = db.getRef(ref);
final ObjectId src = db.resolve(ref + "^{commit}"); // $NON-NLS-1$
if (src == null) throw die(MessageFormat.format(CLIText.get().refDoesNotExistOrNoCommit, ref));
Ref oldHead = db.getRef(Constants.HEAD);
Git git = new Git(db);
MergeCommand mergeCmd =
git.merge()
.setStrategy(mergeStrategy)
.setSquash(squash)
.setFastForward(ff)
.setCommit(!noCommit);
if (srcRef != null) mergeCmd.include(srcRef);
else mergeCmd.include(src);
MergeResult result;
try {
result = mergeCmd.call();
} catch (CheckoutConflictException e) {
result = new MergeResult(e.getConflictingPaths()); // CHECKOUT_CONFLICT
}
switch (result.getMergeStatus()) {
case ALREADY_UP_TO_DATE:
if (squash) outw.print(CLIText.get().nothingToSquash);
outw.println(CLIText.get().alreadyUpToDate);
break;
case FAST_FORWARD:
ObjectId oldHeadId = oldHead.getObjectId();
outw.println(
MessageFormat.format(
CLIText.get().updating,
oldHeadId.abbreviate(7).name(),
result.getNewHead().abbreviate(7).name()));
outw.println(result.getMergeStatus().toString());
break;
case CHECKOUT_CONFLICT:
outw.println(CLIText.get().mergeCheckoutConflict);
for (String collidingPath : result.getCheckoutConflicts())
outw.println("\t" + collidingPath); // $NON-NLS-1$
outw.println(CLIText.get().mergeCheckoutFailed);
break;
case CONFLICTING:
for (String collidingPath : result.getConflicts().keySet())
outw.println(MessageFormat.format(CLIText.get().mergeConflict, collidingPath));
outw.println(CLIText.get().mergeFailed);
break;
case FAILED:
for (Map.Entry<String, MergeFailureReason> entry : result.getFailingPaths().entrySet())
switch (entry.getValue()) {
case DIRTY_WORKTREE:
case DIRTY_INDEX:
outw.println(CLIText.get().dontOverwriteLocalChanges);
outw.println(" " + entry.getKey()); // $NON-NLS-1$
break;
case COULD_NOT_DELETE:
outw.println(CLIText.get().cannotDeleteFile);
outw.println(" " + entry.getKey()); // $NON-NLS-1$
break;
}
break;
case MERGED:
String name;
if (!isMergedInto(oldHead, src)) name = mergeStrategy.getName();
else name = "recursive"; // $NON-NLS-1$
outw.println(MessageFormat.format(CLIText.get().mergeMadeBy, name));
break;
case MERGED_NOT_COMMITTED:
outw.println(CLIText.get().mergeWentWellStoppedBeforeCommitting);
break;
case MERGED_SQUASHED:
case FAST_FORWARD_SQUASHED:
case MERGED_SQUASHED_NOT_COMMITTED:
outw.println(CLIText.get().mergedSquashed);
outw.println(CLIText.get().mergeWentWellStoppedBeforeCommitting);
break;
case ABORTED:
throw die(CLIText.get().ffNotPossibleAborting);
case NOT_SUPPORTED:
outw.println(MessageFormat.format(CLIText.get().unsupportedOperation, result.toString()));
}
}