Matthias Sohn [Tue, 11 Jun 2019 21:09:19 +0000 (23:09 +0200)]
Merge branch 'master' into stable-5.4
* master:
Handle missing "ours" stage in WorkingTreeIterator.hasCrLfInIndex()
Config: Add helper method to check for empty value
ErrorProne: Increase severity of FutureReturnValueIgnored to ERROR
FS_Win32: Add missing parentheses on if-blocks
Upgrade spotbugs to 3.1.12
Abbreviated{Long}ObjectId: Make operator precedence explicit
GC: Update TODO comments
FS_POSIX: Fix reference comparison of Boolean.FALSE
Increase bazel timeout for long running tests
Use bazelisk to switch between used bazel version
Bump minimum Bazel version to 0.26.1
Bazel: Bump skylib library version to 0.8.0
Retry loading config when locked by another process
Make pull --rebase on an unborn branch do a checkout
Warn if configured cookie file is missing
Handle escaped CR-LF in git config files
DescribeCommand: use glob match instead of path match
Fix off-by-one error in RebaseTodoFile when reading a todo file
Consistently use "!isEmpty()" to detect non-empty list
TransportHttp: Check for non-empty list with "!isEmpty()" rather than
"size() > 0"
TransportHttp: Fix comparison of size with ">= 0"
NetscapeCookieFileTest: Split HttpCookiesMatcher to own class
Bazel: Add missing dependency on mockito for TransportHttpTest
Determine hard-linking and nlink support per FileStore
Support reading and writing cookies.
Repository: Add getIdentifier() method to avoid instanceof operator
Update to Orbit R20190602212107
PacketLineIn: Deprecate the END constant
PacketLineIn: Add an iterator over strings in the input stream
Replace most usages of PacketLineIn.END with PacketLineIn.end()
PacketLineIn: Deprecate DELIM constant
Replace trivial reference comparison of PacketLineIn.{DELIM,END}
PacketLineIn: Rename isDelim to isDelimiter
ProtocolV2ParserTest: Fix typo in comment
Upgrade Bouncy Castle to 1.61
Update to Orbit R20190531194818 and rollback update to Ant 1.10.6
cli: Add the --always option to describe
DescribeCommand: Support the "always" option
cli: Add the --tags option to describe
DescribeCommand: Consistenly omit the default value
Remove excess blank line in FileUtilsTest
PacketLineIn: Add helper methods to check for END and DELIM
UploadPackTest: Rename variable to avoid hiding class member
UploadPackTest: Add missing <> operator on instantiation of ArrayList
BitmapCalculator: javadoc fixes
RevWalkUtils: add progress callback to findBranchesReachableFrom
Upgrade maven-source-plugin to 3.1.0
Upgrade maven-jar-plugin to 3.1.2
Upgrade jacoco-maven-plugin to 0.8.4
BitmapCalculator and its test: add missing license header
RevWalk: new method createReachabilityChecker()
Change-Id: I4d76c7c0dbe6411c842f3468b709f7df51789c08 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Thomas Wolf [Tue, 11 Jun 2019 11:16:18 +0000 (13:16 +0200)]
Handle missing "ours" stage in WorkingTreeIterator.hasCrLfInIndex()
In a delete-modify conflict with the deletion as "ours" there may be
no stage 2 in the index. Add appropriate null checks. Add a new test
for this case, and verify that the file gets added with a single LF
after conflict resolution with core.autocrlf=true. This matches the
behavior of canonical git for this case.
Bug: 547724
Change-Id: I1bafdb83d9b78bf85294c78325e818e72fae53bc Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
The TODO comments say "in 5.0", but 5.0 was already released without
resolving them. Remove "in 5.0" on the assumption that the mentioned
improvements still need to be done at some point.
Change-Id: I3eb429803e2266de3fc490e1f3912991c08aa1ad Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Matthias Sohn [Mon, 10 Jun 2019 21:35:20 +0000 (23:35 +0200)]
Increase bazel timeout for long running tests
EolRepositoryTest and GcCommitSelectionTest timed out frequently when
running unit tests using bazel with the default timeout "moderate"
(300s). Increase timeout of these tests to "long" (900s).
Change-Id: I43588cf950f55b50f868d9fe9c66d22bd428a54c Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Michael Keppler [Sun, 29 Jul 2018 05:53:11 +0000 (07:53 +0200)]
Retry loading config when locked by another process
When loading the config, a FileNotFoundException may occur if the file
exists but cannot be read (see [1]). This is the case on Windows with a
virus scanner checking the file. Therefore if the file exists and that
exception is thrown, retry multiple times, similar to how this was
already implemented for IOException.
Thomas Wolf [Sun, 3 Mar 2019 23:07:40 +0000 (00:07 +0100)]
Make pull --rebase on an unborn branch do a checkout
A merging pull on an unborn branch was already supported. But a
rebasing pull failed. If the user has pull.rebase = true in his
user config, the pull would try to rebase. Rebasing needs a parent
commit, though. Native git handles this case:
Thomas Wolf [Fri, 5 Apr 2019 19:33:14 +0000 (21:33 +0200)]
Handle escaped CR-LF in git config files
Canonical git treats CR-LF in config files as LF.[1][2] JGit does so,
too, except when escaped as a line continuation. Correct this and
treat the sequence \-CR-LF as a line continuation.
Bug: 545850
Change-Id: I51e7378a22c21b3baa3701163c423d04c900af5a Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch> Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Thomas Wolf [Sun, 21 Apr 2019 19:23:30 +0000 (21:23 +0200)]
Fix off-by-one error in RebaseTodoFile when reading a todo file
Commit messages of length 1 were not read. 'lineEnd' is the offset
of the last character in the line before the terminating LF or CR-LF,
and 'nextSpace' is actually the offset of the character _after_ the
next space. With a one-character commit message, nextSpace == lineEnd.
The code also assumes the commit message to be optional, but actually
failed in that case because it read beyond the line ending. Fix that,
too.
Add a test case for reading a todo file.
Bug: 546245
Change-Id: I368d63615930ea2398a6230e756442fd88870654 Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Thomas Wolf [Sat, 18 May 2019 21:48:54 +0000 (23:48 +0200)]
Determine hard-linking and nlink support per FileStore
It's quite possible that JGit can use the hard-linking mechanism
for atomic file creation on some volumes but not on others.
Ultimately it depends on the file systems on the mounted volumes.
Cache the information per FileStore instead of using a single
global flag. Also catch FileSystemException, it may be thrown
if the operating system reports a failure. The previously caught
AccessDeniedException is a sub-class of FileSystemException.
Bug: 547332
Change-Id: I1ef672b3468b0be79e71674344f16f28f9d11ba1 Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Matthias Sohn [Thu, 6 Jun 2019 09:34:56 +0000 (11:34 +0200)]
Merge branch 'stable-5.3' into stable-5.4
* stable-5.3:
Prepare 5.3.3-SNAPSHOT builds
JGit v5.3.2.201906051522-r
Prepare 5.1.9-SNAPSHOT builds
JGit v5.1.8.201906050907-r
Test detecting modified packfiles
Enhance fsTick() to use filesystem timer resolution
Add debug trace to measure time needed to open pack index
Extend FileSnapshot for packfiles to also use checksum to detect changes
Wait opening new packfile until it can't be racy anymore
Avoid null PackConfig in GC
Add FileSnapshot test testing recognition of file size changes
Capture reason for result of FileSnapshot#isModified
Skip FileSnapshotTest#testSimulatePackfileReplacement on Windows
Tune max heap size for tests
Fix FileSnapshotTest.testNewFileNoWait() to match its javadoc
ObjectDirectory: fix closing of obsolete packs
Update API filters for methods added to fix bugs
Bazel: Increase severity of most error-prone checks to ERROR
Enable error-prone checks by default
Add bazel options to align with gerrit's
Include filekey file attribute when comparing FileSnapshots
Measure file timestamp resolution used in FileSnapshot
Fix FileSnapshot's consideration of file size
Fix API problem filters
Fix API problem filters
Change-Id: Ie1c7e4752661aec9e1754660934921224e2408eb Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
David Ostrovsky [Thu, 16 May 2019 15:06:57 +0000 (17:06 +0200)]
Repository: Add getIdentifier() method to avoid instanceof operator
This change is needed to implement permission aware ref database in
Gerrit: [1], that is a pre-requisite to re-enable Git v2 protocol in
Gerrit: [2].
Background: Last year Git v2 protocol was enabled in Gerrit. The fact,
that JGit layer was not calling ref advertise filter for Git v2
protocol, introduced security vulnerability.
The lesson learned from this security incident: Gerrit should not rely
on ref advertise filter being called by JGit to implement crictical
security checks. Instead, the idea is to use the same approach as
currently used by Google's internal code on googlesource.com that
didn't suffer from this vulnerability: provide a custom repository to
JGit. The repository provides a RefDatabase that is permission-aware
and will only ever return refs that the user has access to.
However, due to hard coded instanceof operator usages in JGit code
base, some tests in Gerrit are failing with: [1] in place. This change
addresses this problem.
Change-Id: I67c0f53ca33b149442e7ee3e51910d19e3f348d5 Signed-off-by: David Ostrovsky <david@ostrovsky.org> Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Wed, 5 Jun 2019 19:18:21 +0000 (21:18 +0200)]
Merge branch 'stable-5.2' into stable-5.3
* stable-5.2:
Prepare 5.1.9-SNAPSHOT builds
JGit v5.1.8.201906050907-r
Test detecting modified packfiles
Enhance fsTick() to use filesystem timer resolution
Add debug trace to measure time needed to open pack index
Extend FileSnapshot for packfiles to also use checksum to detect changes
Wait opening new packfile until it can't be racy anymore
Avoid null PackConfig in GC
Add FileSnapshot test testing recognition of file size changes
Capture reason for result of FileSnapshot#isModified
Skip FileSnapshotTest#testSimulatePackfileReplacement on Windows
Tune max heap size for tests
Fix FileSnapshotTest.testNewFileNoWait() to match its javadoc
ObjectDirectory: fix closing of obsolete packs
Include filekey file attribute when comparing FileSnapshots
Measure file timestamp resolution used in FileSnapshot
Fix FileSnapshot's consideration of file size
Fix API problem filters
Fix API problem filters
Matthias Sohn [Wed, 5 Jun 2019 13:43:29 +0000 (15:43 +0200)]
Merge branch 'stable-5.1' into stable-5.2
* stable-5.1:
Prepare 5.1.9-SNAPSHOT builds
JGit v5.1.8.201906050907-r
Test detecting modified packfiles
Enhance fsTick() to use filesystem timer resolution
Add debug trace to measure time needed to open pack index
Extend FileSnapshot for packfiles to also use checksum to detect changes
Wait opening new packfile until it can't be racy anymore
Avoid null PackConfig in GC
Add FileSnapshot test testing recognition of file size changes
Capture reason for result of FileSnapshot#isModified
Skip FileSnapshotTest#testSimulatePackfileReplacement on Windows
Tune max heap size for tests
Fix FileSnapshotTest.testNewFileNoWait() to match its javadoc
ObjectDirectory: fix closing of obsolete packs
Include filekey file attribute when comparing FileSnapshots
Measure file timestamp resolution used in FileSnapshot
Fix FileSnapshot's consideration of file size
Fix API problem filters
Change-Id: I3ac77bfa03f7436de12ab86e1bba29afee5ccd01 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Test that JGit detects that packfiles have changed even if they are
repacked multiple times in one tick of the filesystem timer.
Test that this detection works also when repacking doesn't change the
length or the filekey of the packfile. In this case where a modified
file can't be detected by looking at file metadata JGit should still
detect too fast modification by racy git checks and trigger rescanning
the pack list and consequently rereading of packfile content.
Change-Id: I67682cfb807c58afc6de9375224ff7489d6618fb Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Enhance fsTick() to use filesystem timer resolution
RepositoryTestCase.fsTick() was was waiting 64, 128, 256, ... milliseconds
until it detected that the filesystem timer has ticked. Make use of
the filesystemtimer resolution information in FS to sleep a fraction
of the filesystem timer resolution. That raises probability to wake up
shortly after the filesystem timer has ticked.
Matthias Sohn [Sun, 26 May 2019 20:40:47 +0000 (22:40 +0200)]
Extend FileSnapshot for packfiles to also use checksum to detect changes
If the attributes of FileSnapshot don't detect modification of a
packfile read the packfile's checksum and compare it against the
checksum cached in the loaded packfile.
Since reading the checksum needs less IO than reloading the complete
packfile this may help to reduce the overhead to detect modficiation
when a gc completes while ObjectDirectory scans for packfiles in another
thread.
Bug: 546891
Change-Id: I9811b497eb11b8a85ae689081dc5d949ca8c4be5 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Wed, 8 May 2019 23:23:15 +0000 (01:23 +0200)]
Wait opening new packfile until it can't be racy anymore
If
- pack.waitPreventRacyPack = true (default is false)
- packfile size > pack.minSizePreventRacyPack (default is 100 MB)
wait after a new packfile was written and before it is opened until it
cannot be racy anymore.
If a new packfile is accessed while it's still racy at least the pack's
index will be reread by ObjectDirectory.scanPacksImpl(). Hence it may
save resources to wait one tick of the file system timer to avoid this
reloading. On filesystems with a coarse timestamp resolution it may be
beneficial to skip this wait for small packfiles.
Bug: 546891
Change-Id: I0e8bf3d7677a025edd2e397dd2c9134ba59b1a18 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
David Pursehouse [Thu, 30 May 2019 11:31:39 +0000 (20:31 +0900)]
PacketLineIn: Add helper methods to check for END and DELIM
These methods will allow clients to check for END and DELIM without
doing a reference comparison on the String objects, which raises
warnings from Error Prone.
Change-Id: I9e7e59843553ed4488ee8e864033198bbb60d67c Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Matthias Sohn [Thu, 9 May 2019 22:58:42 +0000 (00:58 +0200)]
Capture reason for result of FileSnapshot#isModified
This allows to verify the expected behavior in
FileSnapshotTest#testSimulatePackfileReplacement and enables extending
FileSnapshot for packfiles to read the packfile's checksum as another
criterion to detect modifications without reading the full content.
Also add another field capturing the result of the last check if
lastModified was racily clean.
Remove unnecessary determination of raciness in the constructor. It was
determined twice in all relevant cases.
Change-Id: I100a2f49d7949693d7b72daa89437e166f1dc107 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Wed, 22 May 2019 12:42:43 +0000 (14:42 +0200)]
Tune max heap size for tests
This is an attempt to fix crashes observed on the new Jenkins
infrastructure running on Kubernetes [1].
Increase it to 512m for
- org.eclipse.jgit.ant.test
- org.eclipse.jgit.http.test
- org.eclipse.jgit.lfs.server.test
- org.eclipse.jgit.lfs.test
- org.eclipse.jgit.pgm.test
Decrease it to 768m for
- org.eclipse.jgit.test
[1] e.g. https://ci-staging.eclipse.org/jgit/job/stable/job/jgit.gerrit/16074/console
Change-Id: Id074ed0f7bcb8a13da649a547342af2a08439d9f Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
(cherry picked from commit e19e859977525c2a39aaa928dfdef20e5fab7e3c)
Ivan Frade [Thu, 23 May 2019 17:39:31 +0000 (10:39 -0700)]
BitmapCalculator: javadoc fixes
Fill out the description of when IOException is thrown.
Also fix a typo in the description for IncorrectObjectTypeException.
Change-Id: I9fafd19d68ddc4fe4e95e8516c2c38484b941a3a Signed-off-by: Ivan Frade <ifrade@google.com> Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Andrey Loskutov [Sat, 25 May 2019 07:53:47 +0000 (09:53 +0200)]
RevWalkUtils: add progress callback to findBranchesReachableFrom
Offer a version of findBranchesReachableFrom method with progress
monitor callback. This is required to allow UI clients to cancel long
running operations and show progress.
Dave Borowitz [Thu, 23 May 2019 20:56:00 +0000 (13:56 -0700)]
SystemReader: Respect passed-in parent when no system config is present
The default implementation of openSystemConfig has special handling for
when the FS returns null from getGitSystemConfig: it should return a
"real" FileBasedConfig instance that never actually tries to load a
file. However, this codepath was not respecting the passed-in parent
config.
Ivan Frade [Tue, 21 May 2019 00:14:22 +0000 (17:14 -0700)]
RevWalk: new method createReachabilityChecker()
Every caller would need to check if bitmaps are available in the repo to
instantiate a reachability checker.
Offer a method to create the reachability checker in the walk: the
caller has already a walk over the repo, and the walk has all the
information required.
This allows us to make the implementation classes package-private.
Change-Id: I355e47486fcd9d55baa7cb5700ec08dcc230eea5 Signed-off-by: Ivan Frade <ifrade@google.com>
Matthias Sohn [Wed, 22 May 2019 17:37:40 +0000 (19:37 +0200)]
Merge branch 'master' into stable-5.4
* master:
ReachabilityCheckers: @since 5.4
Update Orbit to S20190521195709 for 2019-06 M3
Tune max heap size for tests
GPG: check that the key found is a signing key
GPG: use key fingerprint suffix to compare id for signing key
Recognize ReachabilityCheckerTestCase as helper
UploadPack: restore inadvertently deleted line
UploadPack: Use reachability checker to validate non-advertised wants
Bazel: Simplify names of bouncy castle libraries
Convert to lambda or member reference
BitmappedReachabilityChecker: Reachability check using bitmaps
BitmapCalculator: Get the reachability bitmap of a commit
ReachabilityChecker: Default implementation with a RevWalk
Matthias Sohn [Wed, 22 May 2019 12:42:43 +0000 (14:42 +0200)]
Tune max heap size for tests
This is an attempt to fix crashes observed on the new Jenkins
infrastructure running on Kubernetes [1].
Increase it to 512m for
- org.eclipse.jgit.ant.test
- org.eclipse.jgit.http.test
- org.eclipse.jgit.lfs.server.test
- org.eclipse.jgit.lfs.test
- org.eclipse.jgit.pgm.test
Decrease it to 768m for
- org.eclipse.jgit.test
[1] e.g. https://ci-staging.eclipse.org/jgit/job/stable/job/jgit.gerrit/16074/console
Change-Id: Id074ed0f7bcb8a13da649a547342af2a08439d9f Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Tue, 7 May 2019 21:55:54 +0000 (23:55 +0200)]
Include filekey file attribute when comparing FileSnapshots
Due to finite filesystem timestamp resolution the last modified
timestamp of files cannot detect file changes which happened in the
immediate past (less than one filesystem timer tick ago).
Some filesystems expose unique file identifiers, e.g. inodes in Posix
filesystems which are named filekeys in Java's BasicFileAttributes. Use
them as another means to detect file modifications based on stat
information.
Running git gc on a repository yields a new packfile with the same id as
a packfile which existed before the gc if these packfiles contain the
same set of objects. The content of the old and the new packfile might
differ if a different PackConfig was used when writing the packfile.
Considering filekeys in FileSnapshot may help to detect such packfile
modifications.
Bug: 546891
Change-Id: I711a80328c55e1a31171d540880b8e80ec1fe095 Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Matthias Sohn [Sun, 5 May 2019 01:18:23 +0000 (03:18 +0200)]
Measure file timestamp resolution used in FileSnapshot
FileSnapshot.notRacyClean() assumed a worst case filesystem timestamp
resolution of 2.5 sec (FAT has a resolution of 2 sec). Instead measure
timestamp resolution to avoid unnecessary IO caused by false positives
in detecting the racy git problem caused by finite filesystem timestamp
resolution [1].
Cache the measured resolution per FileStore since timestamp resolution
depends on the respective filesystem type. If timestamp resolution
cannot be measured or fails due to an exception fallback to the worst
case FAT timestamp resolution and avoid caching this value.
Add a 10% safety margin in FileSnapshot.notRacyClean(), though running
FsTest.testFsTimestampResolution() 1000 times which is not using a
safety margin didn't fail on Mac using APFS and Java 8, 11, 12.
Thomas Wolf [Tue, 21 May 2019 16:08:48 +0000 (18:08 +0200)]
GPG: use key fingerprint suffix to compare id for signing key
Check whether the value of the git config user.signingKey is a suffix
of the full fingerprint of the key. This was already used for finding
keys in secring.gpg, but not in pubring.kbx. This mechanism allows a
user to use any unique suffix to identify keys; to avoid needless
collisions it's recommended to use at least the last 16 characters of
the hex representation of the fingerprint, which is the key id.[1]
Jonathan Tan [Tue, 21 May 2019 00:02:07 +0000 (17:02 -0700)]
Recognize ReachabilityCheckerTestCase as helper
4e196faa1b ("ReachabilityChecker: Default implementation with a
RevWalk", 2019-05-15) added ReachabilityCheckerTestCase but did not add
it as a test helper in the corresponding BUILD file, making tests no
longer runnable with Bazel. Resolve this issue.
Change-Id: Iccc00b0d169dbaa137e130ce2ddd1b7669960b52 Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Jonathan Tan [Mon, 20 May 2019 23:22:31 +0000 (16:22 -0700)]
UploadPack: restore inadvertently deleted line
In 7b96bd812e ("UploadPack: Use reachability checker to validate
non-advertised wants", 2019-05-16), a "walk.setRetainBody(false);"
statement was inadvertently deleted. (An earlier version of this commit
had this line in another part of the code and a review comment suggested
to move it back here; the line was then deleted from the other part of
the code but not readded.) Restore this line.
Change-Id: I96ff6106ba9e4eef429388c83e898b3363295f69 Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Jonathan Tan [Mon, 20 May 2019 20:04:28 +0000 (16:04 -0400)]
Merge changes from topic 'reachability-2'
* changes:
UploadPack: Use reachability checker to validate non-advertised wants
BitmappedReachabilityChecker: Reachability check using bitmaps
BitmapCalculator: Get the reachability bitmap of a commit
ReachabilityChecker: Default implementation with a RevWalk
Ivan Frade [Wed, 8 May 2019 23:43:04 +0000 (16:43 -0700)]
UploadPack: Use reachability checker to validate non-advertised wants
In "Reachable commit" request validators, we need to check that a "want"
in the request, that hasn't been advertised, is reachable from the refs
visible to the user.
Current code has intermixed the translation of ObjectIds to RevCommits
(and its error handling) with the actual walk, with the delegation to
bitmaps in restricted circunstances.
Refactor the code to make it "flatter" and more readable. Move ObjectIds
to RevCommits translation to its own functions. Use the reachability
checker instead of a newly defined walk.
Before the non-advertised wants were validated with bitmaps only if any
"want" refered to an non-commit. Now they will be validated with bitmaps
also if the "wants" refer all to commits.
Change-Id: Ib925a48cde89672b07a88bba4e24d0457546baff Signed-off-by: Ivan Frade <ifrade@google.com>
Ivan Frade [Mon, 22 Apr 2019 22:38:45 +0000 (15:38 -0700)]
BitmappedReachabilityChecker: Reachability check using bitmaps
The "basic" reachability check walks the graph starting from the tips
marking things as "uninteresting". If the target commit is marked as
"uninteresting" it was reached; it is reachable from those tips.
This requires a lot of walking and can be solved directly with bitmaps.
Most of the time the bitmaps are already calculated or a short walk
away.
This should improve the performance of reachability checks, for example
in Gitiles.
Change-Id: I83d33271f58d95d2dc9ed151967b3eda513c99f7 Signed-off-by: Ivan Frade <ifrade@google.com>
Ivan Frade [Tue, 7 May 2019 03:39:18 +0000 (20:39 -0700)]
BitmapCalculator: Get the reachability bitmap of a commit
To make reachability checks with bitmaps, we need to get the
reachability bitmap of a commit, which is not always precalculated.
There is already a class returning such bitmap (BitmapWalker) but it
does too much unnecessary work: it calculates ALL reachable objects from
a commit (i.e. including trees and blobs), when for reachability the
commits are just enough.
Introduce BitmapCalculator to get the bitmap of a commit: either because
it is precalculated or generating it with a walk only over commits.
Change-Id: Ibb6c78affe9eeaf1fa362a06daf4fd2d91c1caea Signed-off-by: Ivan Frade <ifrade@google.com>
projects / jgit.git / log