Shawn O. Pearce [Mon, 31 Jan 2011 16:35:17 +0000 (08:35 -0800)]
PackWriter: Support reuse of entire packs
The most expensive part of packing a repository for transport to
another system is enumerating all of the objects in the repository.
Once this gets to the size of the linux-2.6 repository (1.8 million
objects), enumeration can take several CPU minutes and costs a lot
of temporary working set memory.
Teach PackWriter to efficiently reuse an existing "cached pack"
by answering a clone request with a thin pack followed by a larger
cached pack appended to the end. This requires the repository
owner to first construct the cached pack by hand, and record the
tip commits inside of $GIT_DIR/objects/info/cached-packs:
cd $GIT_DIR
root=$(git rev-parse master)
tmp=objects/.tmp-$$
names=$(echo $root | git pack-objects --keep-true-parents --revs $tmp)
for n in $names; do
chmod a-w $tmp-$n.pack $tmp-$n.idx
touch objects/pack/pack-$n.keep
mv $tmp-$n.pack objects/pack/pack-$n.pack
mv $tmp-$n.idx objects/pack/pack-$n.idx
done
(echo "+ $root";
for n in $names; do echo "P $n"; done;
echo) >>objects/info/cached-packs
git repack -a -d
When a clone request needs to include $root, the corresponding
cached pack will be copied as-is, rather than enumerating all of
the objects that are reachable from $root.
For a linux-2.6 kernel repository that should be about 376 MiB,
the above process creates two packs of 368 MiB and 38 MiB[1].
This is a local disk usage increase of ~26 MiB, due to reduced
delta compression between the large cached pack and the smaller
recent activity pack. The overhead is similar to 1 full copy of
the compressed project sources.
With this cached pack in hand, JGit daemon completes a clone request
in 1m17s less time, but a slightly larger data transfer (+2.39 MiB):
Repository owners can periodically refresh their cached packs by
repacking their repository, folding all newer objects into a larger
cached pack. Since repacking is already considered to be a normal
Git maintenance activity, this isn't a very big burden.
[1] In this test $root was set back about two weeks.
Change-Id: Ib87131d5c4b5e8c5cacb0f4fe16ff4ece554734b Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce [Mon, 31 Jan 2011 16:58:23 +0000 (08:58 -0800)]
PackWriter: Display totals after sending objects
CGit pack-objects displays a totals line after the pack data
was fully written. This can be useful to understand some of
the decisions made by the packer, and has been a great tool
for helping to debug some of that code.
Track some of the basic values, and send it to the client when
packing is done:
Shawn O. Pearce [Wed, 2 Feb 2011 21:48:26 +0000 (13:48 -0800)]
RefAdvertiser: Avoid object parsing
It isn't strictly necessary to validate every reference's target
object is reachable in the repository before advertising it to a
client. This is an expensive operation when there are thousands of
references, and its very unlikely that a reference uses a missing
object, because garbage collection proceeds from the references and
walks down through the graph. So trying to hide a dangling reference
from clients is relatively pointless.
Even if we are trying to avoid giving a client a corrupt repository,
this simple check isn't sufficient. It is possible for a reference to
point to a valid commit, but that commit to have a missing blob in its
root tree. This can be caused by staging a file into the index,
waiting several weeks, then committing that file while also racing
against a prune. The prune may delete the blob, since its
modification time is more than 2 weeks ago, but retain the commit,
since its modification time is right now.
Such graph corruption is already caught during PackWriter as it
enumerates the graph from the client's want list and digs back
to the roots or common base. Leave the reference validation also
for that same phase, where we know we have to parse the object to
support the enumeration.
Change-Id: Iee70ead0d3ed2d2fcc980417d09d7a69b05f5c2f Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Jens Baumgart [Wed, 2 Feb 2011 12:13:28 +0000 (13:13 +0100)]
PushCommand: do not set a null credentials provider
PushCommand now does not set a null credentials provider on
Transport because in this case the default provider is replaced with
null and the default mechanism for providing credentials is not
working.
Robin Stocker [Tue, 1 Feb 2011 21:27:33 +0000 (22:27 +0100)]
Don't print "into HEAD" when merging refs/heads/master
When MergeMessageFormatter was given a symbolic ref HEAD which points to
refs/heads/master (which is the case when merging a branch in EGit), it
would result in a merge message like the following:
Merge branch 'a' into HEAD
But it should print the following (as C Git does):
Merge branch 'a'
The solution is to use the leaf ref when checking for refs/heads/master.
Shawn O. Pearce [Mon, 31 Jan 2011 07:40:08 +0000 (23:40 -0800)]
PackWriter: Make thin packs more efficient
There is no point in pushing all of the files within the edge
commits into the delta search when making a thin pack. This floods
the delta search window with objects that are unlikely to be useful
bases for the objects that will be written out, resulting in lower
data compression and higher transfer sizes.
Instead observe the path of a tree or blob that is being pushed
into the outgoing set, and use that path to locate up to WINDOW
ancestor versions from the edge commits. Push only those objects
into the edgeObjects set, reducing the number of objects seen by the
search window. This allows PackWriter to only look at ancestors
for the modified files, rather than all files in the project.
Limiting the search to WINDOW size makes sense, because more than
WINDOW edge objects will just skip through the window search as
none of them need to be delta compressed.
To further improve compression, sort edge objects into the front
of the window list, rather than randomly throughout. This puts
non-edges later in the window and gives them a better chance at
finding their base, since they search backwards through the window.
These changes make a significant difference in the thin-pack:
The resulting pack is 13.63 MiB smaller, even though it contains the
same exact objects. 82,543 fewer objects had to have their sizes
looked up, which saved about 8s of server CPU time. 2,796 more
objects from the client were used as part of the base object set,
which contributed to the smaller transfer size.
Change-Id: Id01271950432c6960897495b09deab70e33993a9 Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Sigend-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Shawn O. Pearce [Sun, 30 Jan 2011 23:10:51 +0000 (15:10 -0800)]
PackWriter: Cleanup findObjectToPack method
Some of this code predates making ObjectId.equals() final
and fixing RevObject.equals() to match ObjectId.equals().
It was therefore more complex than it needs to be, because
it tried to work around RevObject's broken equals() rules
by converting to ObjectId in a different collection.
Also combine setUpWalker() and findObjectsToPack() methods,
these can be one method and the code is actually cleaner.
Change-Id: I0f4cf9997cd66d8b6e7f80873979ef1439e507fe Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
The first 'Compressing objects' progress message is wrong, its
actually PackWriter looking up the sizes of each object in the
ObjectDatabase, so objects can be sorted correctly in the later
type-size sort that tries to take advantage of "Linus' Law" to
improve delta compression.
Rename the progress to say 'Getting sizes', which is an accurate
description of what it is doing.
Change-Id: Ida0a052ad2f6e994996189ca12959caab9e556a3 Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Shawn O. Pearce [Sun, 30 Jan 2011 22:41:50 +0000 (14:41 -0800)]
PackWriter: Don't include edges in progress meter
When compressing objects, don't include the edges in the progress
meter. These cost almost no CPU time as they are simply pushed into
and popped out of the delta search window.
Change-Id: I7ea19f0263e463c65da34a7e92718c6db1d4a131 Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Shawn O. Pearce [Mon, 31 Jan 2011 15:07:05 +0000 (07:07 -0800)]
Show resolving deltas progress to push clients
CGit push clients 1.6.6 and later support progress messages on the
side-band-64k channel during push, as this was introduced to handle
server side hook errors reported over smart HTTP.
Since JGit's delta resolution isn't always as fast as CGit's is,
a user may think the server has crashed and failed to report
status if the user pushed a lot of content and sees no feedback.
Exposing the progress monitor during the resolving deltas phase
will let the user know the server is still making forward progress.
This also helps BasePackPushConnection, which has a bounded timeout
on how long it will wait before assuming the remote server is dead.
Progress messages pushed down the side-band channel will reset the
read timer, helping the connection to stay alive and avoid timing
out before the remote side's work is complete.
Change-Id: I429c825e5a724d2f21c66f95526d9c49edcc6ca9 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce [Sun, 30 Jan 2011 22:43:49 +0000 (14:43 -0800)]
ObjectWalk: Fix reset for non-commit objects
Non-commits are added to a pending queue, but duplicates are
removed by checking a flag. During a reset that flag must be
stripped off the old roots, otherwise the caller cannot reuse
the old roots after the reset.
RevWalk already does this correctly for commits, but ObjectWalk
failed to handle the non-commit case itself.
Change-Id: I99e1832bf204eac5a424fdb04f327792e8cded4a Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Chris Aniszczyk [Mon, 31 Jan 2011 15:59:42 +0000 (09:59 -0600)]
Revert Ie48d6556
This was a mistake that was missed due to historical reasons.
"The first /r/ tells our Apache to redirect the request to Gerrit.
The second /r/ tells Gerrit that the thing following is a Git SHA-1
and it should try to locate the changes that use that commit object.
Nothing I can easily do about it now. The second /r/ is historical
and comes from Gerrit 1.x days."
Change-Id: Iec2dbf5e077f29c0e0686cab11ef197ffc705012 Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Shawn O. Pearce [Fri, 28 Jan 2011 01:20:36 +0000 (17:20 -0800)]
ObjectIdSubclassMap: Support duplicate additions
The new addIfAbsent() method combines get() with add(), but does
it in a single step so that the common case of get() returning null
for a new object can immediately insert the object into the map.
Change-Id: Ib599ab4de13ad67665ccfccf3ece52ba3222bcba Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
I regret adding this feature to the public API. Caches aren't always
the best idea, as they require work to maintain. Here the cache is
redundant information that must be computed, and when it grows stale
must be removed. The redundant information takes up more disk space,
about the same size as the pack-*.idx files are. For the linux-2.6
repository, that's more than 40 MB for a 400 MB repository. So the
cache is a 10% increase in disk usage.
The entire point of this cache is to improve PackWriter performance,
and only PackWriter performance, and only when sending an initial
clone to a new client. There may be better ways to optimize this, and
until we have a solid solution, we shouldn't be using a separate cache
in JGit.
Mathias Kinzler [Fri, 28 Jan 2011 14:03:02 +0000 (15:03 +0100)]
RebaseCommand: detect and handle fast-forward properly
This bug was hidden by an incomplete test: the current Rebase
implementation using the "git rebase -i" pattern does not work
correctly if fast-forwarding is involved. The reason for this is that
the log command does not return any commits in this case.
In addition, a check for already merged commits was introduced to
avoid spurious conflicts.
Matthias Sohn [Fri, 10 Dec 2010 20:58:05 +0000 (21:58 +0100)]
[findbugs] Do not ignore exceptional return value of mkdir
java.io.File.mkdir() and mkdirs() report failure as an exceptional
return value false. Fix the code which silently ignored this
exceptional return value.
Change-Id: I41244f4b9d66176e68e2c07e2329cf08492f8619 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Mon, 10 Jan 2011 22:09:34 +0000 (23:09 +0100)]
Do not create files to be updated before checkout of DirCache entry
DirCacheCheckout.checkoutEntry() prepares the new file content using a
temporary file and then renames it to the file to be written during
checkout. For files to be updated checkout() created each file before
calling checkoutEntry(). Hence renaming the temporary file always
failed which was corrected in exception handling by retrying to rename
the file after deleting the just newly created file.
Change-Id: I219f864f2ed8d68051d7b5955d0659964fa27274 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Shawn O. Pearce [Wed, 26 Jan 2011 22:27:32 +0000 (14:27 -0800)]
Teach PackWriter how to reuse an existing object list
Counting the objects needed for packing is the most expensive part of
an UploadPack request that has no uninteresting objects (otherwise
known as an initial clone). During this phase the PackWriter is
enumerating the entire set of objects in this repository, so they can
be sent to the client for their new clone.
Allow the ObjectReader (and therefore the underlying storage system)
to keep a cached list of all reachable objects from a small number of
points in the project's history. If one of those points is reached
during enumeration of the commit graph, most objects are obtained from
the cached list instead of direct traversal.
PackWriter uses the list by discarding the current object lists and
restarting a traversal from all refs but marking the object list name
as uninteresting. This allows PackWriter to enumerate all objects
that are more recent than the list creation, or that were on side
branches that the list does not include.
However, ObjectWalk tags all of the trees and commits within the list
commit as UNINTERESTING, which would normally cause PackWriter to
construct a thin pack that excludes these objects. To avoid that,
addObject() was refactored to allow this list-based enumeration to
always include an object, even if it has been tagged UNINTERESTING by
the ObjectWalk. This implies the list-based enumeration may only be
used for initial clones, where all objects are being sent.
The UNINTERESTING labeling occurs because StartGenerator always
enables the BoundaryGenerator if the walker is an ObjectWalk and a
commit was marked UNINTERESTING, even if RevSort.BOUNDARY was not
enabled. This is the default reasonable behavior for an ObjectWalk,
but isn't desired here in PackWriter with the list-based enumeration.
Rather than trying to change all of this behavior, PackWriter works
around it.
Because the list name commit's immediate files and trees were all
enumerated before the list enumeration itself starts (and are also
within the list itself) PackWriter runs the risk of adding the same
objects to its ObjectIdSubclassMap twice. Since this breaks the
internal map data structure (and also may cause the object to transmit
twice), PackWriter needs to use a new "added" RevFlag to track whether
or not an object has been put into the outgoing list yet.
Change-Id: Ie99ed4d969a6bb20cc2528ac6b8fb91043cee071 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce [Wed, 26 Jan 2011 01:20:08 +0000 (17:20 -0800)]
Allow ObjectReuseAsIs to resort objects during writing
It can be very handy for the implementation to resort the
object list based on data locality, improving prefetch in
the operating system's buffer cache.
Export the list to the implementation was a proper List,
and document that its mutable and OK to be modified. The
only caller in PackWriter is already OK with these rules.
Change-Id: I3f51cf4388898917b2be36670587a5aee902ff10 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce [Tue, 25 Jan 2011 00:18:23 +0000 (16:18 -0800)]
PackWriter: Use TOPO order only for incremental packs
When performing an initial clone of a repository there are no
uninteresting commits, and the resulting pack will be completely
self-contained. Therefore PackWriter does not need to honor C
Git standard TOPO ordering as described in JGit commit ba984ba2e0a
("Fix checkReferencedIsReachable to use correct base list").
Switching to COMMIT_TIME_DESC when there are no uninteresting commits
allows the "Counting objects" phase to emit progress earlier, as the
RevWalk will not buffer the commit list. When TOPO is set the RevWalk
enumerates all commits first, before outputing any for PackWriter to
mark progress updates from.
Change-Id: If2b6a9903b536c7fb3c45f85d0a67ff6c6e66f22 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce [Sun, 23 Jan 2011 01:27:20 +0000 (17:27 -0800)]
Remove getObjectsDirectory, openPack from base API
These two methods are specific to the FileRepository implementation
and should not be exposed as part of the base Repository API. Now
that PackParser is generic and does not require these two methods
to import a pack stream into a repostiory, it is safe to remove
these and get them out of the public view.
Change-Id: I8990004d08074657f467849dabfdaa7e6674e69a Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Matthias Sohn [Thu, 27 Jan 2011 16:20:04 +0000 (17:20 +0100)]
Hard reset should not report conflict on untracked file
This problem surfaced since EGit Core ResetOperationTest is failing
since change I26806d21. JGit detected checkout conflict for untracked
files which never were tracked by the repository.
"git reset --hard" in c git also doesn't remove such untracked files.
Change-Id: Icc8e1c548ecf6ed48bd2979c81eeb6f578d347bd Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Make sure not to overwrite untracked not-ignored files
When DirCacheCheckout was checking out it was silently
overwriting untracked files. This is only ok if the
files are also ignored. Untracked and not ignored files
should not be overwritten. This fix adds checks for
this situation.
Because this change in the behaviour also broke tests
which expected that a checkout will overwrite untracked
files (PullCommandTest) these tests have to be modified
also.
Bug: 333093
Change-Id: I26806d2108ceb64c51abaa877e11b584bf527fc9 Signed-off-by: Christian Halstrick <christian.halstrick@sap.com> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Sasa Zivkov [Wed, 26 Jan 2011 16:28:47 +0000 (17:28 +0100)]
Fixed several NPEs in the Fetch CLI
The Fetch command line was failing with NPE in case some options were omitted.
Additionally, it was setting a negative timeout when no timeout option was used
which caused HttpURLConnection to throw an IllegalArgumentException.
Change-Id: I2c67e2e1a03044284d183d73f0b82bb7ff79de95 Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
When debugging and enhancing DirCacheCheckout.processEntry() I found
that some of if-statements where hard to read/understand. This
change just splits some long if statements and adds more comments
explaining in which state we are. This change is only a preparation
for followup commits which introduce checks for untracked+ignored
files.
Change-Id: I670ff08310b72c858709b9e395f0aebb4b290a56 Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
If HEAD exists but points to an not-existing branch the merge
command should silently create the missing branch and check
it out. This happens if you pull into freshly initalized repo.
HEAD points to refs/heads/master but refs/heads/master doesn't
exist. If you know merge a commit X into HEAD then the branch
master should be created (pointing to X) the working tree should
be updated to reflect X. That is achieved by checkout with one
tree only (HEAD is missing).
A test for this functionality will come the the next proposal
in PullCommandTest.
Change-Id: Id4a0d56d944e0acebd4b3157428bb50bd3fdd872 Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Per Salomonsson [Wed, 26 Jan 2011 00:16:24 +0000 (01:16 +0100)]
Support for self signed certificate (HTTPS)
Add possibility to disable ssl verification, just as i can do with git
using: git config --global http.sslVerify false
To enable the feature, configure
Window->Preferences->Team->Git->Configuration
and add a new key/value: http.sslVerify=false
When handling repos over https, JGit will then check that flag to see
if security is loose and the ssl verification should be ignored.
Having it implemented as a key/value makes it not too obvious in the
GUI - so the user must know what he/she is doing when adding it. Being
aware of the risks etc.
Bug: 332487
Change-Id: I2a1b8098b5890bf512b8dbe07da41036c0fc9b72 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Shawn O. Pearce [Wed, 19 Jan 2011 00:33:33 +0000 (16:33 -0800)]
Permit disabling birthday attack checks in PackParser
Reading a repository for millions of missing objects might be very
expensive to perform, especially if the repository is on a network
filesystem or some other costly RPC backend. A repository owner
might choose to accept some risk in return for better performance,
so allow disabling collision checking when receiving a pack.
Currently there is no way for an end-user to disable this feature.
This is intentional, because it is generally *NOT* a good idea to
skip this check. Instead this feature is supplied for storage
implementations to bypass the default checking logic, should they
have their own custom routines that is just as effective but can
be handled more efficiently.
Change-Id: I90c801bb40e86412209de0c43e294a28f6a767a5 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce [Wed, 19 Jan 2011 01:14:15 +0000 (17:14 -0800)]
Ensure all deltas were resolved in a pack
If a pack uses OFS_DELTA only (e.g. its an initial push to a
repository) and PackParser's implementation is broken such that the
delta chain that hangs below a particular object offset is empty, the
entryCount won't match the expected objectCount. Fail fast rather
than claiming the stream was parsed correctly.
The current implementation is not broken as described above. I broke
the code when I implemented my own new subclass of PackParser (which
incorrectly mucked with the object offset information), leading me to
discover this consistency check was missing.
Change-Id: I07540f0ae1144ef6f3bda48774dbdefb8876e1d3 Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Shawn O. Pearce [Fri, 14 Jan 2011 22:17:55 +0000 (14:17 -0800)]
Refactor IndexPack to not require local filesystem
By moving the logic that parses a pack stream from the network (or
a bundle) into a type that can be constructed by an ObjectInserter,
repository implementations have a chance to inject their own logic
for storing object data received into the destination repository.
The API isn't completely generic yet, there are still quite a few
assumptions that the PackParser subclass is storing the data onto
the local filesystem as a single file. But its about the simplest
split of IndexPack I can come up with without completely ripping
the code apart.
Change-Id: I5b167c9cc6d7a7c56d0197c62c0fd0036a83ec6c Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Jesse Greenwald [Fri, 14 Jan 2011 22:34:35 +0000 (16:34 -0600)]
Parse RevCommit bodies before calling RevFilter.include()
RevFilter.include()'s documentation promises the RevCommit's
body is parsed before include is invoked. This wasn't always
true if the commit was parsed once, had its body discarded,
the RevWalk was reset() and started a new traversal.
Change-Id: Ie5cafde09ae870712b165d8a97a2c9daf90b1dbd Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Sasa Zivkov [Fri, 21 Jan 2011 16:04:24 +0000 (17:04 +0100)]
Exposed the constructor of Note class
Additionally, defined the NoteMap.getNote method which returns a Note
instance. These changes were necessary to enable implementation of
the NoteMerger interface (the merge method needs to instantiate a
Note) and to enable direct use of NoteMerger which expects instances
of Note class as its paramters. Implementing creation of code review
summary notes in Gerrit [1] will make use of both of these features.
Change-Id: I627aefcedcd3434deecd63fa1d3e90e303b385ac Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com> Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Introduce metaData compare between working tree and index entries
Instead of offering only a high-level isModified() method a new
method compareMetadata() is introduced which compares a working tree entry
and a index entry by looking at metadata only. Some use-cases
(e.g. computing the content-id in idBuffer()) may use this new method
instead of isModified().
Change-Id: I4de7501d159889fbac5ae6951f4fef8340461b47 Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Robin Rosenberg [Fri, 21 Jan 2011 00:23:24 +0000 (01:23 +0100)]
Add progress reporting to IndexDiff
Change-Id: I4f05bdb0c58b039bd379341a6093f06a2cdfec6e Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com> Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Thu, 30 Dec 2010 22:10:55 +0000 (23:10 +0100)]
File utility for creating a new empty file
The java.io.File.createNewFile() method for creating new empty files
reports failure by returning false. To ease proper checking of return
values provide a utility method wrapping createNewFile() throwing
IOException on failure.
Change-Id: I42a3dc9d8ff70af62e84de396e6a740050afa896 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Roberto Tyley [Wed, 12 Jan 2011 14:34:10 +0000 (14:34 +0000)]
Fix API ListBranchCommand for listmode 'all'
If remote branches are present they can not be added
to the RefMap from the local branches - the two RefMaps
have a different value of 'prefix' and consequently an
IllegalArgumentException is thrown.
Sasa Zivkov [Fri, 7 Jan 2011 12:38:28 +0000 (13:38 +0100)]
Using java.util.concurrent in NLSTest instead of handling threads directly.
A test in NLSTest was mixing the "old" and the "new" way of handling
concurrency. This change makes use of the java.util.concurrent facilities to
control concurrency and removes the code that was directly dealing with Thread
objects.
Change-Id: Ie7267776e988a48a5443f0f3fe4eb43e79eee4b1 Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>
Sasa Zivkov [Tue, 4 Jan 2011 14:27:26 +0000 (15:27 +0100)]
Merging Git notes
Merging Git notes branches has several differences from merging "normal"
branches. Although Git notes are initially stored as one flat tree the
tree may fanout when the number of notes becomes too large for efficient
access. In this case the first two hex digits of the note name will be
used as a subdirectory name and the rest 38 hex digits as the file name
under that directory. Similarly, when number of notes decreases a fanout
tree may collapse back into a flat tree. The Git notes merge algorithm
must take into account possibly different tree structures in different
note branches and must properly match them against each other.
Any conflict on a Git note is, by default, resolved by concatenating
the two conflicting versions of the note. A delete-edit conflict is, by
default, resolved by keeping the edit version.
The note merge logic is pluggable and the caller may provide custom
note merger that will perform different merging strategy.
Additionally, it is possible to have non-note entries inside a notes
tree. The merge algorithm must also take this fact into account and
will try to merge such non-note entries. However, in case of any merge
conflicts the merge operation will fail. Git notes merge algorithm is
currently not trying to do content merge of non-note entries.
Thanks to Shawn Pearce for patiently answering my questions related to
this topic, giving hints and providing code snippets.
Change-Id: I3b2335c76c766fd7ea25752e54087f9b19d69c88 Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com> Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Marc Strapetz [Fri, 7 Jan 2011 11:52:42 +0000 (12:52 +0100)]
Fix IgnoreRule for directory-only patterns
Patterns containing only a trailing slash have to be treated
as "global" patterns. For example: "classes/" matches "classes"
as well as "dir/classes" directory.
Shawn O. Pearce [Thu, 6 Jan 2011 18:45:25 +0000 (10:45 -0800)]
Config: Preserve existing case of names in sections
When an application asks for the names in a section, it may want to
see the existing case that was stored by the user. For example,
Gerrit Code Review wants to store a configuration block like:
[access "refs/heads/master"]
label-Code-Review = group Developers
and although the name label-Code-Review is case-insensitive, it wants
to display the case as it appeared in the configuration file.
When enumerating section names or variable names (both of which are
case-insensitive), Config now keeps track of the string that first
appeared, and presents them in file order, permitting applications to
use this information. To maintain case-insensitive behavior, the
contains() method of the returned Set<String> still performs a
case-insensitive compare.
This is a behavior change if the caller enumerates the returned
Set<String> and copies it to his own Set<String>, and then performs
contains() tests against that, as the strings are now the original
case from the configuration block. But I don't think anyone actually
does this, as the returned sets are immutable and are cached.
Change-Id: Ie4e060ef7772958b2062679e462c34c506371740 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce [Mon, 3 Jan 2011 00:42:44 +0000 (16:42 -0800)]
Use heap based stack for PackFile deltas
Instead of using the current thread's stack to recurse through the
delta chain, use a linked list that is stored in the heap. This
permits the any thread to load a deep delta chain without running out
of thread stack space.
Despite needing to allocate a stack entry object for each delta
visited along the chain being loaded, the object allocation count is
kept the same as in the prior version by removing the transient
ObjectLoaders from the intermediate objects accessed in the chain.
Instead the byte[] for the raw data is passed, and null is used as a
magic value to signal isLarge() and enter the large object code path.
Like the old version, this implementation minimizes the amount of
memory that must be live at once. The current delta instruction
sequence, the base it applies onto, and the result are the only live
data arrays. As each level is processed, the prior base is discarded
and replaced with the new result.
Each Delta frame on the stack is slightly larger than the standard
ObjectLoader.SmallObject type that was used before, however the Delta
instances should be smaller than the old method stack frames, so total
memory usage should actually be lower with this new implementation.
Change-Id: I6faca2a440020309658ca23fbec4c95aa637051c Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Sasa Zivkov [Mon, 3 Jan 2011 15:03:49 +0000 (16:03 +0100)]
NoteMap implements Iterable<Note>
We will need to iterate over all notes of a NoteMap, at least this will be
needed for testing purposes. This change also implied making the Note class
public.
Change-Id: I9b0639f9843f457ee9de43504b2499a673cd0e77 Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>
Shawn O. Pearce [Sun, 2 Jan 2011 22:35:04 +0000 (14:35 -0800)]
Cleanup configuration of Maven JUnit runner
Set the plugin version in the top-level pom, not the unit test pom.
This ensures the same plugin is used for all JUnit tests within the
overall project.
Drop the include **/*Test.java definition, as its no longer necessary
with the JUnit 4 based test suite. All of the test classes now end
with "Test" and include @Test annotations on the test methods.
Change-Id: Ib2c180bf531e1a97e31979fcc281fa0fc5a1abb3 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Robin Rosenberg [Sun, 2 Jan 2011 21:05:13 +0000 (22:05 +0100)]
Implement a revert command
This is almost reverted cherry-pick, and the implementation is
almost identical. It orders the input to merge differently to get
the effect and produces a different commit message with the
default author, rather than the original author.
Change-Id: I39970091d9f7406ae7168b8efaab23a5e2c16bad Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Robin Rosenberg [Sat, 1 Jan 2011 18:05:00 +0000 (19:05 +0100)]
Require the hamcrest packaging that comes with Eclipse
The other one gets installed with SWTBot, but you do not
need it if you do not hack EGit. Using import-package
instead of require-bundle fixes the dependency. Actually
we do not need hamcrest at this time, but JUnit wants it.
Change-Id: I59873618f86d02e8439d40c1f322ea8e5c4fe3fc Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Robin Rosenberg [Fri, 31 Dec 2010 10:44:54 +0000 (11:44 +0100)]
Fix TestTranslationBundle
The test was never run from maven, because its name did not end
in a way that was recognized by the pom. After rename it failed
because it did not find its resources.
Rename test class and move resources to the resources folder
Change-Id: I74a7ef1373cd902e1d05ff6ea38f8648b5fc5700 Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Robin Rosenberg [Fri, 31 Dec 2010 10:44:54 +0000 (11:44 +0100)]
Convert all JGit unit tests to JUnit 4
Eclipse has some problem re-running single JUnit tests if
the tests are in Junit 3 format, but the JUnit 4 launcher
is used. This was quite unnecessary and the move was not
completed. We still have no JUnit4 test.
This completes the extermination of JUnit3. Most of the
work was global searce/replace using regular expression,
followed by numerous invocarions of quick-fix and organize
imports and verification that we had the same number of
tests before and after.
- Annotations were introduced.
- All references to JUnit3 classes removed
- Half-good replacement for getting the test name. This was
needed to make the TestRngs work. The initialization of
TestRngs was also made lazily since we can not longer find
out the test name in runtime in the @Before methods.
- Renamed test classes to end with Test, with the exception
of TestTranslateBundle, which fails from Maven
- Moved JGitTestUtil to the junit support bundle
Change-Id: Iddcd3da6ca927a7be773a9c63ebf8bb2147e2d13 Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
projects / jgit.git / log