Some instances may benefit from having access to memory efficient
storage for some small values, like single flag bits. Give up a
portion of our delta depth field to make 4 bits available to any
subclass that wants it.
This still gives us room for delta chains of 1,048,576 objects,
and that is just insane. Unpacking 1 million objects to get to
something is longer than most users are willing to wait for data
from Git.
Change-Id: If17ea598dc0ddbde63d69a6fcec0668106569125
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
An ObjectReader implementation may be very slow for a single object,
but yet support bulk queries efficiently by batching multiple small
requests into a single larger request. This easily happens when the
reader is built on top of a database that is stored on another host,
as the network round-trip time starts to dominate the operation cost.
RevWalk, ObjectWalk, UploadPack and PackWriter are the first major
users of this new bulk interface, with the goal being to support an
efficient way to pack a repository for a fetch/clone client when the
source repository is stored in a high-latency storage system.
Processing the want/have lists is now done in bulk, to remove
the high costs associated with common ancestor negotiation.
PackWriter already performs object reuse selection in bulk, but it
now can also do the object size lookup and object counting phases
with higher efficiency. Actual object reuse, deltification, and
final output are still doing sequential lookups, making them a bit
more expensive to perform.
Change-Id: I4c966f84917482598012074c370b9831451404ee
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
By giving the reader information about the roots of a revision
traversal, some readers may be able to prefetch information from
their backing store using background threads in order to reduce
data access latency. However this isn't typically necessary so
the default reader implementation doesn't react to the advice.
Change-Id: I72c6cbd05cff7d8506826015f50d9f57d5cda77e
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
ObjectReader implementations may wish to use multiple threads in
order to evaluate object reuse faster. Let the reader make that
decision by passing the iteration down into the reader.
Because the work is pushed into the reader, it may need to locate a
given ObjectToPack given its ObjectId. This can easily occur if the
reader has sent a list of ObjectIds to the object database and gets
back information keyed only by ObjectId, without the ObjectToPack
handle. Expose lookup using the PackWriter's own internal map,
so the reader doesn't need to build a redundant copy to track the
assocation of ObjectId back to ObjectToPack.
Change-Id: I0c536405a55034881fb5db92a2d2a99534faed34
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
When the output stream is deeply buffered (e.g. 1 MiB or more in
an HTTP servlet on some containers) trying to kick out the header
earlier will prevent the client from stalling hard while the first
1 MiB is received and it can process the pack header. Forcing a
flush here lets the client see the header and start its progress
monitor for "Receiving objects: (1/N)" so the user knows there
is still activity occurring, even though the buffering may cause
there to be some lag as the buffer fills up on the sending side.
Change-Id: I3edf39e8f703fe87a738dc236d426b194db85e3a
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Callers catching a MissingObjectException may need programmatic
access to the ObjectId that wasn't available in the repository.
Change-Id: I2be0380251ebe7e4921fa74e246724e48ad88b0e
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Storage implementations or application code using an ObjectReader
may want to access this constant without being inside of a subclass
of the reader.
Change-Id: I6c871a03d5846b9bb899de4d14a265e8b204d8e0
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Storage implementations may find this useful when implementing the
ObjectReuseAsIs interface on their ObjectReader. Expose it so we
don't force them to create a redundant copy of the information.
Change-Id: I802ec8113c00884fccde5d0e92b9849716316f62
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This permits formatting in hex into an existing byte array
supplied by the caller, and mirrors our copyRawTo method
with the same parameter signature.
Change-Id: Ia078d83e338b09b903bfd2d04284e5283f885a19
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Callers might have a canonical tag encoding on hand that they
wish to convert into a clean structure for presentation purposes,
and the object may not be available in a repository. (E.g. maybe
its a "draft" tag being written in an editor.)
Change-Id: I387a462afb70754aa7ee20891e6c0262438fdf32
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Callers might have a canonical commit encoding on hand that they
wish to convert into a clean structure for presentation purposes,
and the object may not be available in a repository. (E.g. maybe
its a "draft" commit being written in an editor.)
Change-Id: I21759cff337cbbb34dbdde91aec5aa4448a1ef37
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The Tag class now only supports the creation of an annotated tag
object. To read an annotated tag, applictions should use RevTag.
This permits us to have exactly one implementation, and RevTag's
is faster and more bug-free.
Change-Id: Ib573f7e15f36855112815269385c21dea532e2cf
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The Commit class now only supports the creation of a commit object.
To read a commit, applictions should use RevCommit. This permits
us to have exactly one implementation, and RevCommit's is faster
and more bug-free.
Change-Id: Ib573f7e15f36855112815269385c21dea532e2cf
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Git doesn't store millisecond accuracy in person identity lines,
so a line that we create in Java and round-trip through a Git object
wouldn't compare as being equal. Truncate to seconds when comparing
values to ensure the same identity is equal.
Change-Id: Ie4ebde64061f52c612714e89ad34de8ac2694b07
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
When we need the canonical form of a commit or a tag in order to
parse it into our RevCommit or RevTag fields, we really need it as a
single contiguous byte array. However the ObjectDatabase may choose
to give us a large loader. In general commits or tags are always
under the several MiB limit, so even if the loader calls it "large"
we should still be able to afford the JVM heap memory required to
get a single byte array. Coerce even large loaders into a single
byte array anyway.
Change-Id: I04efbaa7b31c5f4b0a68fc074821930b1132cfcf
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Since equals() is now final and does not permit being overridden,
we should do the same thing with compareTo() to prevent different
subclasses from having different ordering behaviors. This could
lead to the same mess that we had with different equals() behaviors.
Change-Id: I35a849b6efccee5fe74cc5788a3566a1516004b7
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Since equals() is now final and does not permit being overridden,
we should do the same thing with hashCode() to prevent different
subclasses from having different hashing behaviors. This could
lead to the same mess that we had with different equals() behaviors.
Change-Id: I35a849b6efccee5fe74cc5788a3566a1516004b7
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
When RevObject overrode equals() to provide only reference equality
we used to need to convert a RevObject into an ObjectId by copy()
just to use standard Java tools like JUnit assertEquals(), or to
use contains() or get() on standard java.util collection types.
Now that we have removed this override and made ObjectId's equals()
final (preventing any of this mess in the future), some copy()
calls are unnecessary. Anytime the value is being used as an input
to a lookup routine, or to an equals, we can avoid the copy().
However we still want to use copy() anytime we are given an ObjectId
that may exist long-term, where we don't want the high cost of the
additional storage from a RevCommit extension. So we can't remove
all uses of copy(), just some of them.
Change-Id: Ief275dace435c0ddfa362ac8e5d93558bc7e9fc3
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Configuration change events were not being triggered, now they are
forwarded from the FileConfig up to the Repository's listeners.
Change-Id: Ida94a59f5a2b7fa8ae0126e33c13343275483ee5
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The MergeResult class is enhanced to report more data about a
three-way merge. Information about conflicts and the base, ours,
theirs commits can be retrived.
Change-Id: Iaaf41a1f4002b8fe3ddfa62dc73c787f363460c2
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
We should be more lenient when tagging without an
tagger or message. Currently, we will throw an NPE
which is incorrect behavior.
Change-Id: I04e30ce25a9432e4ca56c3f29658ecb24fb18d24
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
There was a duplicated getter and setter for tagger in Tag.
There's no needed to have two getters and setters that represent
the same things. The appropriate tests were updated also.
Change-Id: If46dc00c4c0f31ea4234c6d3bda3c03e6ebbafac
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Added a utility method to set the reset an index to match exactly
some content in the filesystem. This can be used by tests to prepare
commits in the working-tree and set the index in one shot.
[sp: Cleaned up formatting, added getEntryFile(), released inserter.]
Change-Id: If38b1f7cacaaf769f51b14541c5da0c1e24568a5
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Such events make no sense, it has never been visible to this
process so no client can have a stale value of the ref.
Change-Id: Iea3a5035b0a1410b80b09cf53387b22b78b18018
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Add a convenience API in FileRepository to pass in a String that
points to the GIT_DIR location. This is converted to a File and
sent through the usual constructor.
Change-Id: I588388f37e89b8c690020f110a1bc59f46170c40
Exclude ignored files from IndexDiff tree walk.
This makes EGit commit much faster.
Change-Id: I398499510c22c37667b7612db32eac3b31d325f0
Signed-off-by: Jens Baumgart <jens.baumgart@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
This can result in an infinitely hanging IDE.
Change-Id: I669bc8d220a07011a42edf79de31825305ff3763
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>
If the exact rename matrix for a particular ObjectId isn't square we
crashed with an ArrayIndexOutOfBoundsException because the matrix
entries were encoded backwards. The encode function accepts the
source (aka deleted) index first, not second. Add a unit test to
cover this non-square case to ensure we don't have this regression
in the future.
Change-Id: I5b005e5093e1f00de2e3ec104e27ab6820203566
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
It is useful to be able to replace an existing Change-Id
in the message, for example if the user decides not to
amend the previous commit.
Bug: 321188
Change-Id: I594e7f9efd0c57d794d2bd26d55ec45f4e6a47fd
Signed-off-by: Stefan Lay <stefan.lay@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
TreeWalk calls this value "path", while "name" is the stuff after the
last slash. FileHeader should do the same thing to be consistent.
Rename getOldName to getOldPath and getNewName to getNewPath.
Bug: 318526
Change-Id: Ib2e372ad4426402d37939b48d8f233154cc637da
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
A bug in rename detection would cause file scores to be wrong. The
bug was due to the way rename detection would judge the similarity
between files. If file A has three lines containing 'foo', and file
B has 5 lines containing 'foo', the rename detection phase should
record that A and B have three lines in common (the minimum of the
number of times that line appears in both files). Instead, it would
choose the the number of times the line appeared in the destination
file, in this case file B. I fixed the bug by having the
SimilarityIndex instead choose the minimum number, as it should. I
also added a test case to verify that the bug had been fixed.
Change-Id: Ic75272a2d6e512a361f88eec91e1b8a7c2298d6b
IndexDiff was re-implemented and now uses TreeWalk instead
of GitIndex. Additionally, gitignore support and retrieval of
untracked files was added.
Change-Id: Ie6a8e04833c61d44c668c906b161202b200bb509
Signed-off-by: Jens Baumgart <jens.baumgart@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
When the add parameter is set all modified and deleted files
are staged prior to commit.
Change-Id: Id23bc25730fcdd151386cd495a7cdc0935cbc00b
Signed-off-by: Stefan Lay <stefan.lay@sap.com>
This change is mainly done for a subsequent commit
which will introduce the "all" parameter to the Commit
command.
Bug: 318439
Change-Id: I85a8a76097d0197ef689a289288ba82addb92fc9
Signed-off-by: Stefan Lay <stefan.lay@sap.com>
The CommitCommand should not use java.io to delete MERGE_HEAD and MERGE_MSG
files since Repository already has utility methods for that.
Change-Id: If66a419349b95510e5b5c2237a91f06c1d5ba0d4
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
For daemons we might want to disable delta compression entirely, or
in some strange case an administrator might need to turn of delta
reuse. Expose these normally internal pack settings through the pack
configuration section.
Change-Id: I39bfefee8384c864cc04ffac724f197240c8a11a
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
When we are creating a pack the higher level application should be able
to override the PackConfig used, allowing it to control the number of
threads used or how much memory is allocated per writer.
Change-Id: I47795987bb0d161d3642082acc2f617d7cb28d8c
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
We only use these variables once, so just put them at the proper
use site and avoid assigning the local variable. The code is a
bit shorter and the intent is a little bit more clear.
Change-Id: I70d120fb149b612ac93055ea39bc053b8d90a5db
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This refactoring permits applications to configure global per-process
settings for all packing and easily pass it through to per-request
PackWriters, ensuring that the process configuration overrides the
repository specific settings.
For example this might help in a daemon environment where the server
wants to cap the resources used to serve a dynamic upload pack
request, even though the repository's own pack.* settings might be
configured to be more aggressive. This allows fast but less bandwidth
efficient serving of clients, while still retaining good compression
through a cron managed `git gc`.
Change-Id: I58cc5e01b48924b1a99f79aa96c8150cdfc50846
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Currently, a NullPointerException occurs in this case. We should
instead throw a more meaningful Exception with a proper message.
This is a very "stupid" implementation which simply checks for
the existence of a ".gitmodules" file.
Bug: 300731
Bug: 306765
Bug: 308452
Bug: 314853
Change-Id: I155aa340a85cbc5d7d60da31dba199fc30689b67
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>
the following tests fail under windows because certain inputstreams
are not closed and files cannot be deleted because of that. The
main problem I found is UnpackedObject.InflaterInputStream.close().
This method may throw exceptions found by checkValidEndOfStream()
but doesn't call super.close() before leaving. It is not clear to me
which resources a close() method should release before it throws an
exception. But those reseources which are not published to the
outside and which therefore cannot be closed by other means have to
be closed in all cases.
I changed the close() method to call super.close() under all
circumstances.
failing tests:
testStandardFormat_LargeObject_TruncatedZLibStream(org.eclipse.jgit.storage.file.UnpackedObjectTest)
testStandardFormat_LargeObject_TrailingGarbage(org.eclipse.jgit.storage.file.UnpackedObjectTest)
testPackFormat_SmallObject(org.eclipse.jgit.storage.file.UnpackedObjectTest)
Change-Id: Id2e609a29e725aad953ff9bd88af6381df38399d
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
By deferring tag sorting until the commit is produced by the walker
we can avoid an infinite loop that was triggered by trying to sort
tags while allocating a commit. This also avoids needing to look
at commits which aren't going to be produced in the result.
Bug: 321103
Change-Id: I25acc739db2ec0221a50b72c2d2aa618a9a75f37
Reviewed-by: Mathias Kinzler <mathias.kinzler@sap.com>
Reviewed-by: Christian Halstrick <christian.halstrick@sap.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
These need to be dynamic based on the current thread's environment
at time of execution in order to be properly localized for the end
user that will be seeing these messages.
Change-Id: I4976f462cfe606edd2761c0e36b2f6b20f63d53c
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
By permitting the caller of PackWriter to select the Executor it
uses for task execution, we give the caller the ability to manage
the lifecycle of the thread pool, including reusing it across
concurrent pack generators.
This is the first step to supporting application thread pools
within Daemon or another managed service like Gerrit Code Review.
Change-Id: I96bee7b9c30ff9885f2bd261d0b6daaac713b5a4
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce
Mathias Kinzler
Christian Halstrick
Chris Aniszczyk
Robin Rosenberg
Ketan Padegaonkar
Matthias Sohn
Jens Baumgart
Stefan Lay
Jeff Schumacher