Han-Wen Nienhuys [Mon, 18 Nov 2019 00:29:16 +0000 (16:29 -0800)]
Introduce RefDatabase#hasFastTipsWithSha1
The reftable format supports fast inverse (SHA1 => ref) queries.
If the ref database does not support fast inverse queries, it may be
advantageous to build a complete SHA1 to ref map in advance for
multiple uses. To let applications decide, this function indicates
whether the inverse map is available.
Masaya Suzuki [Fri, 8 Nov 2019 18:12:20 +0000 (10:12 -0800)]
transport: Let users specify an error handler for unpacking a pack file
Currently, there's no way for a user to customize the error handler for
the exception happened during unpacking an incoming pack file. Create an
error handler class and let them specify one.
Masaya Suzuki [Fri, 8 Nov 2019 02:52:17 +0000 (18:52 -0800)]
transport: Consolidate status reporting code
BaseReceivePack#sendStatusReport anyway needs to know
CAPABILITY_REPORT_STATUS. By moving this flag to BaseReceivePack,
simplify the status reporting code.
Masaya Suzuki [Fri, 8 Nov 2019 02:22:17 +0000 (18:22 -0800)]
transport: Add ReceiveCommandErrorHandler
This gives a chance to handle an exception for a user. For example, when
an IOException is thrown while executing
`walk.parseAny(cmd.getNewId())`, it's always handled as
REJECTED_MISSING_OBJECT. However, IOException can mean a Git storage IO
error. By introducing an error handler class, a user can add a custom
error handler for these cases.
Masaya Suzuki [Fri, 8 Nov 2019 01:40:25 +0000 (17:40 -0800)]
transport: Move exception handler to the caller
Move exception handling code to the caller side. This is a preparation
for adding a custom error handler that is similar to UploadPack.
Note that `catch (Throwable t)` will not affect the exception spec since
Java will do an analysis of rethrown exceptions. See
https://docs.oracle.com/javase/8/docs/technotes/guides/language/catch-multiple.html.
Masaya Suzuki [Fri, 8 Nov 2019 22:30:29 +0000 (14:30 -0800)]
UploadPackServlet: Use uploadWithExceptionPropagation
As UploadPackErrorHandler's Javadoc says, UploadPackServlet should have
called uploadWithExceptionPropagation and let UploadPackErrorHandler to
handle the exception. Fix UploadPackServlet.
Masaya Suzuki [Fri, 8 Nov 2019 22:40:19 +0000 (14:40 -0800)]
GitSmartHttpTools: Do not use sideband when sending an error
Unlike ReceivePack, the V0/V1 UploadPack response does not support
sideband except for the packfile parts. By sending an error in a
sideband packet, the JGit client says "Expected ACK/NACK, got: ...".
Use an error packet always. The recent Git clients will understand it
better than out-of-context sideband packets.
Ivan Frade [Tue, 19 Nov 2019 06:45:19 +0000 (22:45 -0800)]
ReceivePack: Open visibility for some methods
This partially reverts Ic6bb5e66. It made private some methods in
ReceivePack that were protected before. At least two of those methods
(#init and #receivePackAndCheckConnectivity) are used by out-of-tree
subclasses for tracing and testing.
Make ReceivePack#init() and ReceivePack#receivePackAndCheckConnectivity
protected again to allow tracing and testing.
Change-Id: I7ff22c091fbfc2d94009c449d58e7c5ac9f4f759 Signed-off-by: Ivan Frade <ifrade@google.com>
Thomas Wolf [Tue, 6 Aug 2019 16:31:35 +0000 (18:31 +0200)]
Make blame work correctly on merge conflicts
When a conflicting file was blamed, JGit would not identify lines
coming from the merge parents. The main cause for this was that
Blame and BlameCommand simply added the first DirCacheEntry found
for a file to its queue of candidates (blobs or commits) to consider.
In case of a conflict this typically is the merge base commit, and
comparing a auto-merged contents against that base would yield
incorrect results.
Such cases have to be handled specially. The candidate to be
considered by the blame must use the working tree contents, but
at the same time behave like a merge commit/candidate with HEAD
and the MERGE_HEADs as parents. Canonical git does something very
similar, see [1].
Implement that and add tests.
I first did this for the JGit pgm Blame command. When I then tried
to do the same in BlameCommand, I noticed that the latter also
included some fancy but incomplete CR-LF handling. In order to
be able to use the new BlameGenerator.prepareHead() also in
BlameCommand this CR-LF handling was also moved into BlameGenerator
and corrected in doing so.
(Just considering the git config settings was not good enough,
CR-LF behavior can also be influenced by .gitattributes, and even
by whether the file in the index has CR-LF. To correctly determine
CR-LF handling for check-in one needs to do a TreeWalk with at
least a FileTreeIterator and a DirCacheIterator.)
Jonathan Nieder [Tue, 26 Nov 2019 01:42:59 +0000 (17:42 -0800)]
Add missing license header to ReftableDatabase
When this class was split from DfsReftableDatabase in commit 2b1e942729617c45d2cb03b7556ab3d63253f64f (reftable: split off generic
code from DFS code, 2019-09-26), we forgot to carry over the license
header.
Change-Id: I8698001dfb69f58784df643ef0185ab2d55e52aa Reported-by: Masaya Suzuki <masayasuzuki@google.com> Signed-off-by: Jonathan Nieder <jrn@google.com>
Ivan Frade [Thu, 14 Nov 2019 21:56:27 +0000 (13:56 -0800)]
BitmappedReachabilityChecker: Use only one bitmap for the whole check
The checker is creating a new bitmap per branch leading to excessive
memory consumption. For the reachability check one bitmap with the
reachability of all branches aggregated is enough.
Build the reachability bitmap with a filter. The filter itself uses it
to emit only commits not reached before and the caller to check what
targets have been reached already.
BitmapCalculator is not required anymore.
Change-Id: Ic5c62f77fe0f188913215b7eaa51d849a9aae6a5 Signed-off-by: Ivan Frade <ifrade@google.com>
Ivan Frade [Tue, 19 Nov 2019 20:08:53 +0000 (12:08 -0800)]
checkNotAdvertisedWants: Be lazy converting Ref to RevCommit
The ref points to an ObjectId that then is translated into a RevCommit.
This translation can be costly and with the incremental reachability
check is probably not needed for most of the elements.
Delay the translation from ObjectId to RevCommit to when it is needed.
Use Streams, that have the laziness built-in, all the way from Ref to
RevCommit.
This should reduce the latency for reachability checks over big sets of
references.
Change-Id: I28693087321b2beff3eaa1f3d2e7840ab0eedc6d Signed-off-by: Ivan Frade <ifrade@google.com>
Ivan Frade [Tue, 19 Nov 2019 18:40:21 +0000 (10:40 -0800)]
ReachabilityChecker: Receive a Stream instead of a Collection
Preparatory change. Converting ObjectIds to RevCommits is potentially
expensive and in the incremental reachability check, it is probably not
required for all elements in the collection.
Pass a Stream to the reachability checker. In the follow up we make
the conversion from ObjectId to RevCommit in the stream (i.e. on
demand). This should reduce the latency of reachability checks over big
sets of references.
Change-Id: I9f310e331de5b0bf8de34143bd7dcd34316d2fba Signed-off-by: Ivan Frade <ifrade@google.com>
Ivan Frade [Tue, 12 Nov 2019 22:33:29 +0000 (14:33 -0800)]
UploadPack: Prioritize references for non-advertised wants checks
UploadPack needs to check if object ids that weren't advertised before
are reachable from the references visible to the user. In the
bitmap-based reachability check, this is done incrementally: checking
against one reference, if anything remaining adding a second and so on.
It is more efficient to check first more common references (e.g. refs/heads/*)
Sort the references for the reachability checker. This should solve the
connectivity earlier and require less bitmap creation and less memory.
Change-Id: I48ac10d71e29fab2d346479802401eaea4aacb5c Signed-off-by: Ivan Frade <ifrade@google.com>
Han-Wen Nienhuys [Mon, 12 Aug 2019 15:33:51 +0000 (17:33 +0200)]
file: implement FileReftableDatabase
Reftable is a binary, block-based storage format for the ref-database.
It provides several advantages over the traditional packed + loose
storage format:
* O(1) write performance, even for deletions and transactions.
* atomic updates to the ref database.
* O(log N) lookup and prefix scans
* free from restrictions imposed by the file system: it is
case-sensitive even on case-insensitive file systems, and has
no inherent limitations for directory/file conflicts
* prefix compression reduces space usage for repetitive ref names,
such as gerrit's refs/changes/xx/xxxxx format.
FileReftableDatabase is based on FileReftableStack, which does
compactions inline. This is simple, and has good median performance,
but every so often it will rewrite the entire ref database.
For testing, a FileReftableTest (mirroring RefUpdateTest) is added to
check for Reftable specific behavior. This must be done separately, as
reflogs have different semantics.
Add a reftable flavor of BatchRefUpdateTest.
Add a FileReftableStackTest to exercise compaction.
Add FileRepository#convertToReftable so existing testdata can be
reused.
Michael Keppler [Sat, 16 Nov 2019 15:49:38 +0000 (16:49 +0100)]
Fix Maven missing version warning
[WARNING] Some problems were encountered while building the effective
model for org.eclipse.jgit:org.eclipse.jgit.benchmarks:jar:5.6.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for
org.apache.maven.plugins:maven-shade-plugin is missing. @ line 131,
column 15
Change-Id: Id25916c460bc4a10d0f797779d24f53292df2b77 Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>
Michael Keppler [Sat, 16 Nov 2019 15:23:34 +0000 (16:23 +0100)]
Use Java 8 source and target in Maven
Building the jgit aggregator with Maven leads to a compiler level 1.6
for me, thereby failing the build. Multiple profiles specify
source/target level separately, but there seems no global setting.
Adding the global properties makes the jgit aggregator compile on my
system.
Change-Id: Ia5613cc0fcf6085265a9e48f940e5a7d3f998608 Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>
David Pursehouse [Thu, 14 Nov 2019 00:40:14 +0000 (16:40 -0800)]
ReceivePack: Reduce visibility of methods
Several methods were protected when they were defined in BaseReceivePack
which has since been squashed into ReceivePack. Those methods no longer
need to be protected, and can now be private instead.
Change-Id: Ic6bb5e66f353fcbdc7919847423234af398c88b4 Signed-off-by: David Pursehouse <david.pursehouse@gmail.com> Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Thomas Wolf [Mon, 28 Oct 2019 17:11:57 +0000 (18:11 +0100)]
DiffFormatter: support core.quotePath = false
core.quotePath = false means that "bytes higher than 0x80 are not
considered "unusal" anymore"[1], i.e., they are not escaped. In
essence this preserves non-ASCII characters in path names in output.
Note that control characters and other special characters in the
ASCII range will still be escaped.
Add a new QuotedString.GIT_PATH_MINIMAL singleton implementing this.
Change the normal GIT_PATH algorithm to use bytes instead of characters
so it can be re-used. Provide a setter in DiffFormatter for the quoting
style so that an application can override the default, which is the
setting from the git config (and by default "true"). Use the new
QuotedString.GIT_PATH_MINIMAL when core.quotePath == false.
Thomas Wolf [Sat, 26 Oct 2019 17:58:07 +0000 (19:58 +0200)]
IndexDiff/SubmoduleWalk: make the RepositoryBuilder configurable
Some applications using JGit use their own repository caching. In
such applications, it may be needlessly inefficient to create new
submodule repositories from a SubmoduleWalk or in an IndexDiff. It
can be much more efficient to use an already cached repository
instance.
Provide a way to configure a SubmoduleWalk with a factory to create
BaseRepositoryBuilders to use to create repositories, and use it in
IndexDiff. Provide new IndexDiff.diff() operations that take such an
additional factory as parameter.
An application that caches Repository instances (for instance EGit)
can use a factory that provides builders that don't create a new
Repository instance but that return the already cached instance, if
one is available. Note that in such a case, the application may need
to be prepared to deal with IndexDiff.diff() also _closing_ the
obtained repository; if the application expects its cached Repository
instances to remain open while being cached, it'll have to use
Repository.incrementOpen() to prevent that the repository instance
gets closed.
Bug: 550878
Change-Id: Icc1b34dfc4cebd8ed4739dd09d37744d41adf711 Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
IndexDiff would apply ignore mode ALL from .gitmodules to all remaining
submodules, and would ignore other settings from .gitignore and always
apply the setting defined on the IndexDiff instead. Correct that.
In canonical git the ignore setting from .gitmodules can also be
overridden by .git/config.[1] Implement that override in SubmoduleWalk.
I1ce92869435d5eebb7d671be44561e69c6233134 merged BaseReceivePack into
ReceivePack which breaks API but is only affecting the few jgit based
servers out in the wild.
Change-Id: Iad856a2afaf3cad95d01ad81a0116cebcd9de2d9 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Move the BaseReceivePack implementation back into ReceivePack. This is a
backward-incompatible change. For example, BaseReceivePack.FirstLine no
longer exists and cannot be referenced. However, most of the code
should just work by replacing BaseReceivePack with ReceivePack.
Although this is an API change, it only affects callers using JGit as a
server, and there are very few of those in the wild.
David Pursehouse [Wed, 13 Nov 2019 18:16:25 +0000 (10:16 -0800)]
BaseReceivePack: Add hasReceivedPack method
The getPackSize method will throw IllegalStateException if it is
called when the pack size is not set. This is the case for example
when the received commands are all DELETE and there is no pack.
Add a new method hasReceivedPack that can be called prior to calling
getPackSize, to avoid causing the IllegalStateException.
Thomas Wolf [Tue, 12 Nov 2019 08:38:04 +0000 (09:38 +0100)]
Fix NPE in SystemReader in tests
SystemReader.updateAll() must _not_ test whether the file exists. In
tests at least there are FileBasedConfigs with a null file. Test
configs should (and do) override isOutdated() to deal with this case.
Change-Id: I56303fe0d56afeb9f2203ee807a92c5dcf3809e9 Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Matthias Sohn [Mon, 11 Nov 2019 19:07:01 +0000 (11:07 -0800)]
Merge branch 'stable-5.5'
* stable-5.5:
BaseReceivePack: Fix the format
Prepend hostname to subsection used to store file timestamp resolution
Store filesystem timestamp resolution in extra jgit config
SystemReader: extract updating config and its parents if outdated
Change-Id: Iecfddce8081303af29badcdcd3d72a0da50c964f Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Mon, 7 Oct 2019 17:05:07 +0000 (19:05 +0200)]
Prepend hostname to subsection used to store file timestamp resolution
This ensures the measured filesystem timestamp resolution will be only
used on the machine where it was measured and avoid errors in case the
~/.jgitconfig file is copied to another machine.
Bug: 551850
Change-Id: Iff2a11be62ca94c3bbe4a955182988dc50852f9f Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Mon, 7 Oct 2019 15:58:56 +0000 (17:58 +0200)]
Store filesystem timestamp resolution in extra jgit config
This avoids polluting hand-crafted user level config with
auto-configured options which might disturb in environments where
the user level config is replicated between different machines.
Add a jgit config as parent of the system level config. Persist
measured timestamp resolutions always in this jgit config and read it
via the user global config. This has the effect that auto-configured
timestamp resolution will be used by default and can be overridden in
either the system level or user level config.
Store the jgit config under the XDG_CONFIG_HOME directory following the
XDG base directory specification [1] in order to ensure that we have
write permissions to persist the file. This has the effect that each OS
user will use its jgit config since they typically use different
XDG_CONFIG_HOME directories.
If the environment variable XDG_CONFIG_HOME is defined the jgit config
file is located at $XDG_CONFIG_HOME/jgit/config otherwise the default is
~/.config/jgit/config.
If you want to avoid redundant measurement for different OS users
manually copy the values measured and auto-configured for one OS user to
the system level git config.
Change-Id: I0f2fd3a218ea31f6f6b58b1816af9361e4de54e4 Signed-off-by: David Ostrovsky <d.ostrovsky@gmx.de> Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Thomas Wolf [Sat, 21 Sep 2019 12:38:22 +0000 (14:38 +0200)]
SystemReader: extract updating config and its parents if outdated
Change-Id: Ia77f442e47c5670c2d6d279ba862044016aabd86 Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch> Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Tue, 5 Nov 2019 15:28:06 +0000 (16:28 +0100)]
Merge branch 'stable-5.5'
* stable-5.5:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: If87a13d0f809d9968ad2921b786f4b18e1b494d0 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Tue, 5 Nov 2019 15:10:48 +0000 (16:10 +0100)]
Merge branch 'stable-5.4' into stable-5.5
* stable-5.4:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: I071536d630a95e89f5bbbf965a1571b9f5eb81ee Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Tue, 5 Nov 2019 14:42:14 +0000 (15:42 +0100)]
Merge branch 'stable-5.3' into stable-5.4
* stable-5.3:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: Ib735c4039e24ec8b045ae2cc81df1e9e5c9fa996 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Tue, 5 Nov 2019 14:24:54 +0000 (15:24 +0100)]
Merge branch 'stable-5.2' into stable-5.3
* stable-5.2:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: I00615958ab6fbdff601e87a9792aba5606cda12a Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Tue, 5 Nov 2019 14:07:39 +0000 (15:07 +0100)]
Merge branch 'stable-5.1' into stable-5.2
* stable-5.1:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: If91c55a192d3b2c441d9c8d414f2e24a7261b1b6 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Sat, 3 Aug 2019 10:02:34 +0000 (12:02 +0200)]
JMH benchmark for SimpleLruCache
See [1] for JMH documentation and [2] how to use JMH in Eclipse.
The benchmarks pom currently cannot use the JGit parent pom due to an
ecj bug [3] regarding annotation processing. Hence for now do not
inherit from the JGit parent pom and copy the compiler plugin
configuration for javac from the parent pom.
After running the Maven build the benchmark can be run using Maven:
projects / jgit.git / log