When running on NFS there was a chance that JGits LockFile
semantic is broken because File#createNewFile() may allow
multiple clients to create the same file in parallel. This
change provides a fix which is only used when the new config
option core.supportsAtomicCreateNewFile is set to false. The
default for this option is true. This option can only be set in the
global or the system config file. The repository config file is not
taken into account in this case.
If the config option core.supportsAtomicCreateNewFile is true
then File#createNewFile() is trusted and the behaviour doesn't
change.
But if core.supportsAtomicCreateNewFile is set to false then after
successful creation of the lock file a hardlink to that lock file is
created and the attribute nlink of the lock file is checked to be 2. If
multiple clients manage to create the same lock file nlink would be
greater than 2 showing the error.
This expensive workaround is described in
https://www.time-travellers.org/shane/papers/NFS_considered_harmful.html
section III.d) "Exclusive File Creation"
Change-Id: I3d2cc48d8eb280d5f7039eb94da37804f903be6a
When running an automatic GC on a FileRepository, when the caller
passes a NullProgressMonitor, run the GC in a background thread. Use a
thread pool of size 1 to limit the number of background threads spawned
for background gc in the same application. In the next minor release we
can make the thread pool configurable.
In some cases, the auto GC limit is lower than the true number of
unreachable loose objects, so auto GC will run after every (e.g) fetch
operation. This leads to the appearance of poor fetch performance.
Since these GCs will never make progress (until either the objects
become referenced, or the two week timeout expires), blocking on them
simply reduces throughput.
In the event that an auto GC would make progress, it's still OK if it
runs in the background. The progress will still happen.
This matches the behavior of regular git.
Git (and now jgit) uses the lock file for gc.log to prevent simultaneous
runs of background gc. Further, it writes errors to gc.log, and won't
run background gc if that file is present and recent. If gc.log is too
old (according to the config gc.logexpiry), it will be ignored.
Change-Id: I3870cadb4a0a6763feff252e6eaef99f4aa8d0df
Signed-off-by: David Turner <dturner@twosigma.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Add NoPackSignatureException and UnsupportedPackVersionException to
explicitly mark permanent unrecoverable problems with a pack
Assume problem with a pack is permanent only if we are sure the
exception signals a non-transient problem we can't recover from:
- AccessDeniedException: we lack permissions
- CorruptObjectException: we detected corruption
- EOFException: file ended unexpectedly
- NoPackSignatureException: pack has no pack signature
- NoSuchFileException: file has gone missing
- PackMismatchException: pack no longer matches its index
- UnpackException: unpacking failed
- UnsupportedPackIndexVersionException: unsupported pack index version
- UnsupportedPackVersionException: unsupported pack version
Do not attempt to handle Errors since they are thrown for serious
problems applications should not try to recover from.
Change-Id: I2c416ce2b0e23255c4fb03a3f9a0ee237f7a484a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Since the introduction of generic type parameter inference in Java 7,
it's not necessary to explicitly specify the type of generic parameters.
Enable the warning in Eclipse, and fix all occurrences.
Change-Id: I9158caf1beca5e4980b6240ac401f3868520aad0
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Set missingOverrideAnnotation=warning in Eclipse compiler preferences
which enables the warning:
The method <method> of type <type> should be tagged with @Override
since it actually overrides a superclass method
Justification for this warning is described in:
http://stackoverflow.com/a/94411/381622
Enabling this causes in excess of 1000 warnings across the entire
code-base. They are very easy to fix automatically with Eclipse's
"Quick Fix" tool.
Fix all of them except 2 which cause compilation failure when the
project is built with mvn; add TODO comments on those for further
investigation.
Change-Id: I5772061041fd361fe93137fd8b0ad356e748a29c
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Archived zip files for a same commit have different MD5 hash because
mdate and mdate in the header of zip entries are not specified. In
this case, Commons Compress sets an archived time.
In the original git implementation, it's set a commit time:
e2b2d6a172/archive.c (L378)
By this fix, archive command sets the commit time to ZipArchiveEntry
when RevCommit is given as an archiving target.
Change-Id: I30dd8710e910cdf42d57742f8709e9803930a123
Signed-off-by: Naoki Takezoe <takezoe@gmail.com>
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
TreeWalk provides the new method getEolStreamType. This new method can
be used with EolStreamTypeUtil in order to create a wrapped InputStream
or OutputStream when reading / writing files. The implementation
implements support for the git configuration options core.crlf, core.eol
and the .gitattributes "text", "eol" and "binary"
CQ: 10896
Bug: 486563
Change-Id: Ie4f6367afc2a6aec1de56faf95120fff0339a358
Signed-off-by: Ivan Motsch <ivan.motsch@bsiag.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Attributes MacroExpander implements macros used in git attributes. This
is implemented inside the TreeWalk using a lazy created MacroExpander.
In addition, the macro expander caches the global and info attributes
node in order to provide fast merge of attributes.
Change-Id: I2e69c9fc84e9d7fb8df0a05817d688fc456d8f00
Signed-off-by: Ivan Motsch <ivan.motsch@bsiag.com>
Attributes represents a semantic collector of Attribute(s) and replaces
the anonymous Map<String,Attribute>. This class will be returned by
TreeWalk.getAttributes(). It offers convenient access to the attributes
wrapped in the Attributes object. Adds preparations for a future
Attribute Macro Expansion
Change-Id: I8348c8c457a2a7f1f0c48050e10399b0fa1cdbe1
Signed-off-by: Ivan Motsch <ivan.motsch@bsiag.com>
This fixes a warning saying this filter isn't needed anymore.
Change-Id: If77056378befe86c1773950dbe48a82c833fd532
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
When checking out a branch we need to access the attributes stored
in the tree to be checked out. E.g. directly after a clone we checkout
the remote HEAD. In this case index and workingtree are still empty.
So we have to search the tree to be checked out for attributes.
Change-Id: I6d96f5d095ed2e3c259d4b12124e404f5215bd9f
Adds the getAttributes feature to the tree walk. The computation of
attributes needs to be done by the TreeWalk since it needs both a
WorkingTreeIterator and a DirCacheIterator.
Bug: 342372
CQ: 9120
Change-Id: I5e33257fd8c9895869a128bad3fd1e720409d361
Signed-off-by: Arthur Daussy <arthur.daussy@obeo.fr>
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
These API changes were introduced in f523f21e and 73474466.
BitmapBuilder is an interface to be implemented by implementors of this
interface. According to OSGi semantic versioning rules breaking API
changes require update of the minor version only if implementors of the
API have to be adapted and the changes do not affect clients of the API.
Change-Id: If45d204181ea9bc788b6b57693ca17b1847564c7
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Update the project-specific Eclipse settings to replace the use of the
org.eclipse.jdt.annotation.Nullable class the new JGit-specific
@Nullable annotation. I verified that Eclipse reports errors when the
return value of a method annotated with
@org.eclipse.jgit.annotations.Nullable is dereferenced without a null
check.
Also remove the Maven and MANIFEST.MF dependencies on
org.eclipse.jdt.annotation.
Eclipse null analysis uses three annotations: @Nullable, @NonNull and
@NonNullByDefault. All three are updated in this patch because it is
invalid to set the Eclipse preferences to empty values. So far only
@Nullable has been introduced in org.eclipse.jgit.annotations.
My personal preference is to follow the advice in Effective Java and
avoid the null-return idiom, and to avoid passing null values in
general. This sets the expectation is that arguments and return types
are assumed non-null unless otherwise documented. If that is the
expectation, then consistent application of @NonNull is redundant and
hurts readability by cluttering the code, obscuring the occasional
@Nullable annotation that really requires attention.
If the JGit community decides there is value in using the @NonNull and
@NonNullByDefault annotations we can add them--this change configures
Eclipse to use them.
Change-Id: I9af1b786d1b44b9b0d9c609480dc842df79bf698
Signed-off-by: Terry Parker <tparker@google.com>
If the checkout path is currently a non-empty directory (and was a link
or a regular file before), this directory will be removed before
performing checkout, but only if the checkout path is specified.
Bug: 474973
Change-Id: Ifc6c61592d9b54d26c66367163acdebea369145c
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
There should be no functional change, the logic updated only to make
code simple so that compiler can understand what is going for. Removed
all @SuppressWarnings("null") annotations since they cannot be used if
"org.eclipse.jdt.core.compiler.problem.potentialNullReference" option is
set to the "error" level.
Bug: 470647
Change-Id: Ie93c249fa46e792198d362e531d5cbabaf41fdc4
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
a85e817d is a slightly breaking API change to classes that were
technically public and technically released in 4.0. However, it is
highly unlikely that people were actually depending on public behavior,
since there were no public methods to create PushCertificates with
anything other than null field values, or a PushCertificateParser that
did anything other than infinite loop or throw exceptions when reading.
Change-Id: I1d0ba9ea0a347e8ff5a0f4af169d9bb18c5838d2
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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 new git capability isn't yet in the wild in the git-core camp.
Hence we can silence this API warning.
Change-Id: I9e030959f658c58344b04ef2f9edd28060f0c964
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
In the DFS implementation, flushing an inserter writes a new pack to
the storage system and is potentially very slow, but was the only way
to ensure previously-inserted objects were available. For some tasks,
like performing a series of three-way merges, the total size of all
inserted objects may be small enough to avoid flushing the in-memory
buffered data.
DfsOutputStream already provides a read method to read back from the
not-yet-flushed data, so use this to provide an ObjectReader in the
DFS case.
In the file-backed case, objects are written out loosely on the fly,
so the implementation can just return the existing WindowCursor.
Change-Id: I454fdfb88f4d215e31b7da2b2a069853b197b3dd
In change If45bc3d078b3d3de87b758e71d7379059d709603 a new parameter was
added to 3 protected methods of ResolveMerger. This breaks the code of
developers which have subclassed ResolveMerger. The API baseline check
in Eclipse reports this as API breakage.
Since this will break only providers but not consumers of the API this
should be allowed also in minor versions. According to OSGi semantic
versioning
http://www.osgi.org/wiki/uploads/Links/SemanticVersioning.pdf
breaking providers in a minor version update is ok.
Therefore silence these errors using API filter rules.
Bug: 440757
Change-Id: Icabbd0e1de7e877c66a5c4a2c8391473f992a1aa
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Making the methods static would gain little in performance,
make the code harder to change. Removing unncessary warnings
is more important.
Change-Id: If3e6aa9c1d92e58b4e7a8e246cf4aace237d7a7b
These settings were added by Eclipse simply by touching
the project settings. Adding these makes it simpler to see
what local changes have been made.
Change-Id: Iab0aa62530312eb0c78b03b5c6a632742bcc4978
Connecting to an SshSession may fail due to different reasons. Jsch for
example often throws an com.jcraft.jsch.JschException: verify: false.[1]
The issue is still not fixed in JSch 0.1.51.
In such a case it is worth retrying to connect. The number of connection
attempts can be configured using ssh_config parameter
"ConnectionAttempts" [2].
Don't retry if the user canceled authentication.
[1] http://sourceforge.net/p/jsch/bugs/58/
[2] http://linux.die.net/man/5/ssh_config
Bug: 437656
Change-Id: I6dd2a3786b7d3f15f5a46821d8edac987a57e381
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
usable"
This reverts commit 2670fd427c.
By returning an instance of File from the ReceivePack.getPackFile the
abstraction of the persistence implementation was broken.
Change-Id: I28e3ebf3a659a7cbc94be51bba9e1ad338f2b786
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Having access to the pack file that was created by the ReceivePack
may be useful for post receive hooks. For example, a hook may want
to check the size of the received pack and the created index.
Change-Id: I4d51758e4565d32c9f8892242947eb72644b847d
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Previously all HTTP communication was done with the help of
java.net.HttpUrlConnection. In order to make JGit usable in environments
where the direct usage of such connections is not allowed but where the
environment provides other means to get network connections an
abstraction for connections is introduced. The idea is that new
implementations of this interface will be introduced which will not use
java.net.HttpUrlConnection but use e.g.
org.apache.client.http.HttpClient to provide network connections.
One example: certain cloud infrastructures don't allow that components
in the cloud communicate directly with HttpUrlConnection. Instead they
provide services where a component can ask for a connection (given a
symbolic name for the destination) and where the infrastructure returns
a preconfigured org.apache.http.client.HttpClient. In order to allow
JGit to be running in such environments we need the abstraction
introduced in this commit.
Change-Id: I3b06629f90a118bd284e55bb3f6465fe7d10463d
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
See change I08bed4275af9ec52aa4d7054067ac82f6a3c9781, where fixing such
warning lead to complaints.
If fixing is not wanted, disable it instead.
Change-Id: If31d4028fa1c6377a11e83ed5688b45701cec68b
Note the the settings are slightly less restrictive for test bundles.
-Also cleanup a couple of malformed javadocs
-Update compiler warnings/errors to include default values from Juno
-We now flag diagnosed null dereference as error. We didn't do that
earlier because of some false positives.
Change-Id: I58386d63164e65d3d8d1998da3390d99bdc7381a
Signed-off-by: Chris Aniszczyk <zx@twitter.com>
This only works with Eclipse 3.6 and newer and requires installation
of new package. Documentation is not very good, but there is a blog
about it here:
http://eclipseandjazz.blogspot.com/2011/10/of-invalid-references-to-system.html
API checking is especially useful on OS X where Java5 is not readily
available.
Change-Id: I3c0ad460874a21c073f5ac047146cbf5d31992b4
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
We should use a template for Mylyn commit messages that matches with our
guidelines for commit messages.
http://wiki.eclipse.org/EGit/Contributor_Guide#Commit_message_guidelines
Bug: 337401
Change-Id: I05812abf0eb0651d22c439142640f173fc2f2ba0
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Updates the project level settings to run the formatter
on save on only on the edited lines.
Change-Id: I26dd69d0c95e6d73f9fdf7031f3c1dbf3becbb79
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
Some sources had dos line endings. Also configure all projects to use
unix line endings and UTF-8 text encoding.
Change-Id: I8fc9a1dbb219ffa91d1b3011b3b11b7e48e74ca7
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn
Christian Halstrick
David Turner
David Pursehouse
Naoki Takezoe
Bo Zhang
Hugo Arès
Ivan Motsch
Shawn Pearce
Arthur Daussy
Andrey Loskutov
Terry Parker
Dave Borowitz
Robin Rosenberg
Stefan Lay
Saša Živkov
Robin Stocker
Chris Aniszczyk