Most callers/users of TemporaryBuffer are sizing the in-memory
portion large enough that most outputs fit into RAM. With this
assumption they don't pay close attention to the size of IOs
being written, as it "should" just be a copy from one byte array
to another.
Overflow sets up a local file handle, which is costly to write to
for small IO units. Wrap the local file in a BufferedOutputStream
to combine small writes together. Larger writes can still bypass the
buffer as BOS automatically avoids copying for larger writes.
Change-Id: I09f4136dd65c48830cfda86d9101bc647581018a
When reading back from an overflowed TemporaryBuffer the InputStream
must be closed to close the FileInputStream that is reading from
the backing file.
Change-Id: Id83d8f16f5b2c2618a9f841ec3508508455a6ae1
By writing the temporary overflow merge result to $GIT_DIR JGit
can ensure the same filesystem permissions apply to protect the
file contents.
If no directory is available from the repository (e.g. DfsRepository)
null will be passed and the system temporary directory will be used
instead.
Change-Id: I95532aa092676d18f1dc1e3fdbe6dcb1f91b782e
Formatting merge conflicts one byte at a time is going to be very
slow when the final OutputStream is a FileOutputStream and the JVM
is making system calls for each byte output.
When outputting a range of bytes from a byte[] the bol (beginning
of line) value only depends on the value of the last byte written.
Other bytes in the array can be passed directly to the lower stream
for more efficient output.
Change-Id: I3415f9a390ee215210a17bb5bf39164d197e1348
This should considerably speed up the treewalk on larger repositories.
Found by discussing new EGit API to support model merge in change
eda23bb556d342f421f03b93c7faa160998598aa
Change-Id: I822721c76c64e614f87a080ced2457941f53adcd
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
cc: Laurent Delaigue <laurent.delaigue@obeo.fr>
Bug: 390833
Change-Id: I29f7b79b241929877c93ac485c677487a91bb77b
Signed-off-by: André de Oliveira <andre.oliveira@liferay.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
If a non interactive rebase is launched, stopping after a conflict
should set the repository state to RepositoryState.REBASING_MERGE
instead of RepositoryState.REBASING_INTERACTIVE.
Bug: 452623
Change-Id: Ie885aab6d71dabd158a718af0d14fff643c9b850
Also-by: Arthur Daussy <arthur.daussy@obeo.fr>
Signed-off-by: Laurent Delaigue <laurent.delaigue@obeo.fr>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
When RecursiveMerger found that there are multiple base-commits for the
commits to be merged it tries to temporarily merge the base commits. But
if these base commits have no common predecessor there was a bug in JGit
leading to a NPE. This commit fixes this by enforcing that an empty tree
is used as base when merging two unrelated base commits.
This logic was already there when merging two commits which have no
common predecessor (ThreeWayMerger.mergeBase()). But the code which was
computing a new temporary base commit in case of criss-cross merges
didn't take care to pick an empty tree when no common predecessor can be
found.
Bug: 462671
Change-Id: Ibd96302f5f81383f36d3b1e3edcbf5822147b1a4
As we moved minimum Java version to 7 we don't need a separate bundle
and feature for JGit features depending on Java 7 anymore.
Change-Id: Ib5da61b0886ddbdea65298f1e8c6d65c9879ced1
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
This reverts commit 6bc48cdc62.
Until git v1.7.10.2~29^2~1 (builtin/merge.c: reduce parents early,
2012-04-17), C git merge would make merge commits with duplicate parents
when asked to with a series of commands like the following:
git checkout origin/master
git merge --no-ff origin/master
Nowadays "git merge" removes redundant parents more aggressively
(whenever one parent is an ancestor of another and not just when
duplicates exist) but merges with duplicate parents are still permitted
and can be created with git fast-import or git commit-tree and history
viewers need to be able to cope with them.
CommitBuilder is an interface analagous to commit-tree, so it should
allow duplicate parents. (That said, an option to automatically remove
redundant parents would be useful.)
Reported-by: Dave Borowitz <dborowitz@google.com>
Change-Id: Ia682238397eb1de8541802210fa875fdd50f62f0
Signed-off-by: Jonathan Nieder <jrn@google.com>
The block pointer list may have been relatively large, so no need to
make more garbage. Instead, just clear the list and null out all the
elements.
Another possible motivation: a caller may have provided an inaccurate
estimated size, so the list might have been resized several times. If
the list is reused later for a similarly underestimated workload, this
fix will prevent additional resizing on subsequent usages.
Change-Id: I511675035dcff1117381a46c294cc11aded10893
Callers may wish to use TemporaryBuffer as an essentially unbounded
buffer by passing Integer.MAX_VALUE as the size. (This makes it
behave like ByteArrayOutputStream, only without requiring contiguous
memory.) Unfortunately, it was always allocating an array in the
backing block pointer list to hold enough blocks to MAX_VALUE--all
262,016 of them. It wasn't allocating the blocks themselves, but this
array was still extremely wasteful, using about 2MiB of memory on a
64-bit system.
Tweak the interface to specify an estimated size, and only allocate
the block pointer list enough entries to hold that size. It's an
ArrayList, so if that estimate was wrong, it'll grow. We assume the
cost of finding enough contiguous memory to grow that array is
acceptable.
While we're in there, fix an off-by-one error: due to integer division
we were undercounting the number of blocks needed to store n bytes of
data as (n / SZ).
Change-Id: I794eca3ac4472bcc605b3641e177922aca92b9c0
Since 27ae8bc65 Git has implemented AutoCloseable, which means Eclipse
may warn if close() is never called on a Git instance. For example,
the following would result in a resource warning:
Repository repo = openRepository(foo);
Git git = new Git(repo);
try {
git.someCommand().call();
} finally {
repo.close();
}
(The same warning would occur if repo were created in a try-with-
resources block.)
The "obvious" fix is to open git in a try-with-resources block:
try (Repository repo = openRepository(foo);
Git git = new Git(repo)) {
git.someCommand().call();
}
Unfortunately, this construction was subtly broken: it would call both
git.close() and repo.close(), but git.close() would call repo.close()
again. Depending on the repository implementation, this might or might
not be ok. If it's not ok, it might not immediately cause an error, if
the reference count of repo was >2 at the time of closing.
Of course, explicitly calling git.close() followed by repo.close() in
two finally blocks has had the same double-closing problem since
forever. But the problem became worse when Git started implementing
AutoCloseable, because now Eclipse is _actively encouraging_
developers to change working code into broken code.
To work around this, keep track in Git's constructor of whether the
repository was passed in or opened at construction time, and only
close the repository if it was opened by Git.
Note that in the original example, there was not _actually_ a resource
leak, since repo was closed exactly once; git did not _need_ to be
closed in this case. But at least fixing this false-positive warning
no longer introduces a real bug.
Change-Id: Ie927a26ce3ae2bf8c3ef5cb963a60847067db95a
For some specific file, MyersDiff goes into an infinite loop[1]. Since
this problem is hard to reproduce and possibly harder to fix, this
change makes the MyersDiff interruptible so the diff can be aborted at
least when such infinite loop happens.
[1]https://bugs.eclipse.org/bugs/show_bug.cgi?id=444623
Change-Id: I6e006ccb122d1e68c9846a24d5399d94776c2858
Signed-off-by: Hugo Arès <hugo.ares@ericsson.com>
When setting the parents of a commit with setParentIds() or
addParentId() it should be checked that we don't have duplicate parents.
An IllegalArgumentException should be thrown in this case.
Change-Id: I9fa9f31149b7732071b304bca232f037146de454
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
This flushed out a number of bugs in the way DfsRefUpdate, or at least
the InMemoryRepository implementation, processes symrefs. These have
been fixed, to an extent, in InMemoryRepository, but other
implementations may still suffer from these bugs.
Change-Id: Ifd12115a0060b9ff45a88d305b72f91ca0472f9a
The TreeWalk(ObjectReader) constructor is explicitly to handle the case
where the caller is responsible for opening and closing the reader.
The reader should only be closed when it was created in the
TreeWalk(Repository) constructor.
Change-Id: I627681be80d69ea549f953255a64c7b3b68bcec9
The RevWalk(ObjectReader) constructor is explicitly to handle the case
where the caller is responsible for opening and closing the reader.
The reader should only be closed when it was created in the
RevWalk(Repository) constructor.
Change-Id: Ic0d595dc8d10de79e87549546c6c5ea2dc617e9b
PackFile is held by the block cache and cannot be auto closed in a
try-with-resources statement. Remove the interface as JGit does
explicit management of the instances.
ObjectDatabase and RefDatabase are internal details of Repository
and are managed with the Repository. Marking them AutoCloseable
provides no value to the library or an application using the API.
Change-Id: Ibee19eadd66233e6666b601583daa1834a7778f1
Reference equality (!= or ==) cannot be used to check for
String equality. String objects are not necessarily interned
to the same instance.
Use .isEmpty() since the function only cares about an empty
string and does not need to test a specific string value.
Change-Id: If530cb59666a8196d57d2348c893706a517ea541
The %x format specifier is not valid for a byte array.
This patch fixes a bug that would cause an IllegalFormatConversionException.
Change-Id: I025975eca7b2f10bbafa39f5519f8668e6536541
Signed-off-by: David Pletcher <dpletcher@google.com>
Native git supports "git describe --long". This will enforce returning a
long description of a commit even if a tag is directly pointing to the
commit (in contrast to just returning the tag name as it is now). This
commit teaches JGits DescribeCommand and the describe command in the pgm
package to support "--long".
Bug: 460991
Change-Id: I65e179b79e89049c6deced3c71cb3ebb08ed0a8f
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
The index provides access to a list of objects in a pack.
This will be helpful for repository integrity checking.
Change-Id: I435eeeb3fe1b1f5632d40528936416e97491d412
Signed-off-by: David Pletcher <dpletcher@google.com>
This hook uses the file .git/COMMIT_EDITMSG to receive and potentially
modify the commit message.
Change-Id: Ibe2faadfb5d3932a5a3da2252d8156c4c04856c7
Signed-off-by: Laurent Delaigue <laurent.delaigue@obeo.fr>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Hooks are now obtained via a convenient API like git commands, and
callers don't have to check for their existence.
The pre-commit hook has been updated accordingly.
Change-Id: I3383ffb10e2f3b588d7367b9139b606ec7f62758
Signed-off-by: Laurent Delaigue <laurent.delaigue@obeo.fr>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
This allows for testing arbitrary sets of push/fetch hooks (e.g.
PreReceiveHook) without depending on either an external protocol (e.g.
HTTP) or the local filesystem.
Change-Id: I4ba2fff9c8a484f990dea05e14b0772deddb7411
TransportLocal knows how to spin up a thread to allow two repositories
in the same process to communicate using the wire protocol. However,
it is still tied to local on-disk filesystems, and needs to be able to
fork processes if not using the default git-{upload,receive}-pack
implementation.
Extract out the connection classes so they can be used by other
transport implementations.
Change-Id: I5db59086740735508c2e70a597c2d1a89014b072
Matthias Sohn
Shawn Pearce
André de Oliveira
Laurent Delaigue
Christian Halstrick
Jonathan Nieder
Dave Borowitz
Hugo Arès
Markus Duft
Matthew Spurrier
David Pletcher