If we get an exception while indexing the incoming pack, its likely
a stream corruption. We already report an error to the client, but
we eat the stack trace, which makes debugging issues related to a
bug inside of JGit nearly impossible. Rethrow it under a new type
UnpackException, so embedding servers or applications can catch the
error and provide it to a human who might be able to forward such
traces onto a JGit developer for evaluation.
Change-Id: Icad41148bbc0c76f284c7033a195a6b51911beab
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Instead of getting the limit from CoreConfig, use the larger of the
reader's limit or 5 MiB, under the assumption that any annotated tag
or commit of interest should be under 5 MiB. But if a repository
was really insane and had bigger objects, the reader implementation
can set its streaming limit higher in order to allow RevWalk to
still process it.
Change-Id: If2c15235daa3e2d1f7167e781aa83fedb5af9a30
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
IDEs like Eclipse offer up the settings in WindowCacheConfig to the
user as a global set of options that are configured for the entire
JVM process, not per-repository, as the cache is shared across the
entire JVM. The limit on how much we are willing to allocate for
an object buffer is similar to the limit on how much we can use for
data caches, allocating that much space impacts the entire JVM and
not just a single repository, so it should be a global limit.
Change-Id: I22eafb3e223bf8dea57ece82cd5df8bfe5badebc
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Similar to C Git, default our difference when no trees are given
to us to something that makes a tiny bit of sense to the human.
We also now support the --cached flag, and have its meaning work the
same way as C Git.
Change-Id: I2f19dad4e018404e280ea3e95ebd448a4b667f59
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
If the iterators passed into a diff formatter are working tree
iterators, we should enable ignoring files that are ignored, as
well as actually pull up the current content from the working tree
rather than getting it from the repository.
Because we abstract away the working directory access logic,
we can now actually support rename detection between the working
directory and the local repository when using a DiffFormatter.
This means its possible for an application to show an unstaged
delete-add pair as a rename if the add path is not ignored.
(Because the ignored file wouldn't show up in our difference output.)
Even more interesting is we can now do rename detection between any
two working trees, if both input iterators are WorkingTreeIterators.
Unfortunately we don't (yet) optimize for comparing the working
tree with the index involved so we can take advantage of cached
stat data to rule out non-dirty paths.
Change-Id: I4c0598afe48d8f99257266bf447a0ecd23ca7f5e
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
When comparing a DirCache and a WorkingTree using ANY_DIFF we
sometimes didn't recursive into a subtree of both sides gave us
zeroId() back for the identity of a subtree. This happens when the
DirCache doesn't have a valid cache tree for the subtree, as then
it uses zeroId() for the ObjectId of the subtree, which then appears
to be equal to the zeroId() of the WorkingTreeIterator's subtree.
We work around this by adding a hasId() method that returns true
only if this iterator has a valid ObjectId. The idEquals method
on TreeWalk than only performs a compare between two iterators if
both iterators have a valid id.
Change-Id: I695f7fafbeb452e8c0703a05c02921fae0822d3f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Applications just want a quick way to configure our diff
implementation, and then just want to use it without a lot of fuss.
Move all of the rename detection logic and path following logic
out of our pgm package and into DiffFormatter itself, making it
much easier for a GUI to take advantage of the features without
duplicating a lot of code.
Change-Id: I4b54e987bb6dc804fb270cbc495fe4cae26c7b0e
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
canResetHead now returns true.
Resetting mixed / hard works in EGit in merging state.
Change-Id: I1512145bbd831bb9734528ce8b71b1701e3e6aa9
Signed-off-by: Jens Baumgart <jens.baumgart@sap.com>
Sorting the array can be useful when its being used as a map of pairs
that are appended into the array and then later merge-joined against
another array of similar semantics.
Change-Id: I2e346ef5c99ed1347ec0345b44cda0bc29d03e90
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
We know exactly how many lines we need by the time we compute our
per-line hashes, as we have already built the lines IntList to give
us the starting position of each line in the buffer. Using that
we can properly size the array, and don't need the dynamic growing
feature of IntList. So drop the indirection and just use a fixed
size array.
Change-Id: I5c8c592514692a8abff51e5928aedcf71e100365
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Create a new 'org.eclipse.jgit.api.errors' package to contain
exceptions related to using the Git porcelain API.
Change-Id: Iac1781bd74fbd520dffac9d347616c3334994470
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Today while debugging some TreeWalk related code I noticed this
filter did not have a toString(), making it harder to see what the
filter graph was at a glance in the debugger. Add a toString()
for debugging to match other TreeFilters, and clean up the Javadoc
slightly so its a bit more clear about the purpose of the filter.
While we are mucking about with some of this code, simplify
the logic of include so its shorter and thus faster to read.
The pattern now more closely matches that of SkipWorkTreeFilter.
Change-Id: Iad433a1fa6b395dc1acb455aca268b9ce2f1d41b
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This allows callers to force the iterator back to its starting point,
so it can be traversed again. The default way to do this is to use
back(1) until first() is true, but this isn't very efficient for any
iterator. All current implementations have better ways to implement
reset without needing to seek backwards.
Change-Id: Ia26e6c852fdac8a0e9c80ac72c8cca9d897463f4
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
When we are asked to create a difference between two files the caller
really wants to see that output. Instead of punting because a file
is too big to process, consider it to be binary. This reduces the
accuracy of our output display, but makes it a lot more likely that
the formatter can still generate something semi-useful.
We set our default binary threshold to 50 MiB, which is the same
threshold that PackWriter uses before punting and deciding a file
is too big to delta compress. Anything under this size we try to
load and process, anything over that size (or that won't allocate
in the heap) gets tagged as binary.
Change-Id: I69553c9ef96db7f2058c6210657f1181ce882335
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
When adding or deleting a file, we shouldn't ever prefix /dev/null
with the a/ or b/ prefixes. Doing so is a mistake and confuses a
patch parser which handles /dev/null magically, while a/dev/null is
a file called null in the dev directory of the project.
Also when adding or deleting the "diff --git" line has the "real"
path on both sides, so we should see the following when adding the
file called foo:
diff --git a/foo b/foo
--- /dev/null
+++ b/foo
The --- and +++ lines do not appear in a pure rename or copy delta,
C Git diff seems to omit these, so we now omit them as well. We also
omit the index line when the ObjectIds are exactly equal.
Change-Id: Ic46892dea935ee8bdee29088aab96307d7ec6d3d
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Instead of trying to stream out the header, we can drop a redundant
code path by formatting the header into a temporary buffer and then
streaming out the actual line differences later.
Its a small amount of unnecessary work to buffer the file header,
but these are typically very tiny so the cost to format and reparse
is relatively low.
Change-Id: Id14a527a74ee0bd7e07f46fdec760c22b02d5bdf
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Other fields in this class are initialized in their declaration, make
the code consistent with itself and use only one style.
Change-Id: I49a007e97ba52faa6b89f7e4b1eec85dccac0fa4
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This class does a lot more than just reflow a patch script, it now is
the primary means of creating a diff output.
Change-Id: I74467c9a53dc270ef8c84e7c75f388414ec8ba8f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
To give the user more control on which file system abstraction
should be used on Windows, FS.detect() may be configured
to assume a Cygwin installation or nor.
Currently, if a branch is created that has special chars ('#' in the bug),
Config will surround the subsection name with double quotes during
it's toText method which will result in an invalid file after saving the
Config.
Bug: 318249
Change-Id: I0a642f52def42d936869e4aaaeb6999567901001
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>
Extended flags are processed and available via DirCacheEntry's
new isSkipWorkTree() and isIntentToAdd() methods. "resolve-undo"
information is completely ignored since its an optional extension.
Change-Id: Ie6e9c6784c9f265ca3c013c6dc0e6bd29d3b7233
The merge algorithm was reporting conflicts which where to big.
Example: The common base was "ABC", the "ours" version contained
"AB1C" (the addition of "1" after pos 2) and the "theirs" version also
contained "AB1C". We have two potentially conflicting edits in the
same region which happen to bring in exactly the same content. This
should not be a conflict - but was previously reported as
"AB<<<1===1>>>C".
This is fixed by checking every conflicting chunk whether the
conflicting regions have a common prefix or suffix and by removing
this regions from the conflict.
Change-Id: I4dc169b8ef7a66ec6b307e9a956feef906c9e15e
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Add local changes I missed to push with [1] which broke the JGit
build.
[1] http://egit.eclipse.org/r/#change,1442
Change-Id: I300bfa84c5d8b5128026869b694ef5da7b0d3a4a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
the merge command should use by default the "resolve" merge strategy.
Change-Id: I6c6973a3397cca12bd8a6bd950d04b1766a08b4c
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
This adds the first merge strategy to JGit which does real
content-merges if necessary. The new merge strategy "resolve" takes as
input three commits: a common base, ours and theirs. It will simply takeover
changes on files which are only touched in ours or theirs. For files
touched in ours and theirs it will try to merge the two contents
knowing taking into account the specified common base.
Rename detection has not been introduced for now.
Change-Id: I49a5ebcdcf4f540f606092c0f1dc66c965dc66ba
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Signed-off-by: Stefan Lay <stefan.lay@sap.com>
On Mac OS X MyerDiffPerformanceTest was failing since during the
first few tests the JIT compiler is running in parallel slowing down
the tests. When setting the JVM option -Xbatch forcing the JIT to do
its work prior to running the code this effect can be avoided. Instead
we chose to run some tests without recording prior to the recorded
tests since relying on -X JVM parameters isn't portable across JVMs.
Use 10k * powers of 2 as sample size instead of odd numbers used
before and also improve formatting of performance readings.
Bug: 323766
Change-Id: I9a46d73f81a785f399d3cf5a90c8c0516526e048
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Change-Id: Ibc5a302078bfc01d9ee45a4c0ab0b79b2abd185a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Use 3 different types of LargeObjectException for the 3 major ways
that we can fail to load an object. For each of these use a unique
string translation which describes the root cause better than just
the ObjectId.name() does.
Change-Id: I810c98d5691b74af9fc6cbd46fc9879e35a7bdca
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Currently our algorithm requires that we have the delta base as
a contiguous byte array... but getCachedBytes() might not work
if the object is considered to be large by its underlying loader.
Use the limited form to obtain the object as a byte array instead.
Change-Id: I33f12a8811cb6a4a67396174733f209db8119b42
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce
Chris Aniszczyk
Jens Baumgart
Christian Halstrick
Marc Strapetz
Mathias Kinzler
Christian Halstrick
Matthias Sohn