Rename MAGIC_EMPTY_VALUE to MISSING_ENTRY, make it private, and add
a helper method to check if a given string is that value.
This avoids that callers trigger the "reference equality" warning
from Error Prone.
Change-Id: Idc76f78c0cf1828aa48d02ee33911a4b5df50355
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
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>
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.
[1] https://docs.oracle.com/javase/8/docs/api/java/io/FileNotFoundException.html
Bug: 529522
Change-Id: Ic5dc3b7b24bb0005d6256ed00513bc7c0b91e613
Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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:
git init
git remote add origin <URI>
git pull --rebase origin master
Check up front in PullCommand for the unborn head and just do a
checkout in this case. MergeCommand already has similar code.
Bug: 544965
Change-Id: I1277e1ac0b0364b4623fd791f3d6b07bd5f58fca
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
We logged a stack trace if the configured http.cookieFile was missing.
Instead only log a warning.
Bug: 548081
Change-Id: I42e39f5ad8ffce7b43162e5068f60af073b8a126
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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.
[1] https://github.com/git/git/commit/db2c075d9
[2] https://github.com/git/git/blob/v2.21.0/config.c#L485
Bug: 545850
Change-Id: I51e7378a22c21b3baa3701163c423d04c900af5a
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Otherwise tags may fail to match if their name contains slashes.
Canonical git also uses its wildcard matcher in glob mode.[1]
[1] https://github.com/git/git/blob/v2.21.0/builtin/describe.c#L182
Bug: 546703
Change-Id: I122c7959974fa1fc6a53dfc65837e4314a8badd4
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
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>
Replace "size() > 0" with "!isEmpty()" where appropriate.
In the Status implementation we can drop the check; the subsequent
loop will only execute when the list is non-empty anyway.
Change-Id: I355aff551a603373e702a9d44304f087b476263c
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Error Prone reports:
[SizeGreaterThanOrEqualsZero] Comparison of a size >= 0 is always true,
did you intend to check for non-emptiness?
see https://errorprone.info/bugpattern/SizeGreaterThanOrEqualsZero
Change-Id: Ie964771cacca4b15569eb45f6e273ad2a7e2e49c
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
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>
The git config entries "http.cookieFile" and
"http.saveCookies" are correctly evaluated.
Bug: 488572
Change-Id: Icfeeea95e1a5bac3fa4438849d4ac2306d7d5562
Signed-off-by: Konrad Windszus <konrad_w@gmx.de>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
When Error Prone checks are enabled, the "ClassCanBeStatic" warning is
triggered:
Inner class is non-static but does not reference enclosing class
see https://errorprone.info/bugpattern/ClassCanBeStatic
Change-Id: I5a0e3bf0cf8c28176d9c98914c1c0dfab9c5736f
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
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.
[1] https://gerrit-review.googlesource.com/c/gerrit/+/212874
[2] https://gerrit-review.googlesource.com/c/gerrit/+/226754
Change-Id: I67c0f53ca33b149442e7ee3e51910d19e3f348d5
Signed-off-by: David Ostrovsky <david@ostrovsky.org>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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>
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>
Deprecate the constant with the intention of making it private in
a future release.
All existing usage of the constant within JGit code has already been
replaced with the recommended alternatives in preceding commits.
Change-Id: I10eb95f3f92cb74f93a26bf1a6edd24615b75c6f
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Allows callers to read all lines in the input stream until the
END marker is reached, without having to explicitly check for
the END marker.
Replace all remaining usage of the END marker with the new method.
Change-Id: I51f419c7f569ab7ed01e1aaaf6b40ed8cdc2116b
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
PacketLineIn.END is only referenced in tests. Replace most of those
with a new package visible end() method.
Remaining usages of PacketLineIn.END are in the form:
while ((line = pckIn.readString()) != PacketLineIn.END) {
and are not trivial replacements, hence are not touched in this change.
Change-Id: Id77c5321ddcad127130b246bde8f08736e60e1ea
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Deprecate DELIM with the intention of making it private in a future
release.
Callers that want to test if a packet line string is the delimiter
should use the isDelimiter(String) method.
The only other references to DELIM in the JGit code are in tests. For
those, introduce a package visible delimiter() method.
Change-Id: I21e8bbac0ffb9ef710c9753e23435416b09a4891
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Replace reference comparisons of PacketLineIn's DELIM and END strings
with usage of the helper methods isDelimiter() and isEnd().
Change-Id: I52dcfc4ee9097f1bd6970601c716701847d9eebd
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Also now use JcaKeyBoxBuilder constructor in
BouncyCastleGpgKeyLocator.readKeyBoxFile(Path).
CQ: 19868
CQ: 19869
CQ: 19870
Change-Id: I45bd80e158aecd90448b0c7e59615db27aaef892
Signed-off-by: Brandon Weeks <bweeks@google.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Omit the default value of "false" for "useTags" like already done for
"longDesc".
Change-Id: I25aaacae028fc8cf27f4040ba45fe79609318aa1
Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
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>
Initialize it using the repository's config already in the constructor.
Change-Id: I4ea620a7db72956e7109f739990f09644640206b
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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>
This resolves a regression introduced in fef78212.
Change-Id: Ibb4521635a87012520566efc70870c59d11be874
Signed-off-by: Marc Strapetz <marc.strapetz@syntevo.com>
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>
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.
Bug: 547642
Change-Id: I31d1de54dbaa6ffb11e03da4c447963e8defa1d0
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
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.
Change-Id: Id0bcdc93bb42f9ebe3f5ee4c6b4be8863e0133f9
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>
The new ReachabilityChecker interface and its implementations are marked
as @since 5.5, but they will make it to the 5.4 release.
Change-Id: I88c31b3300ccf35d18c35faddb2517f0a57bdcfd
Signed-off-by: Ivan Frade <ifrade@google.com>
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>
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.
Measured Java file timestamp resolution: [2]
[1] https://github.com/git/git/blob/master/Documentation/technical/racy-git.txt
[2] https://docs.google.com/spreadsheets/d/1imy0y6WmRqBf0kjCxzxj2X7M50eIVfa7oaUIzEOHmjo
Bug: 546891
Change-Id: I493f3b57b6b306285ffa7d392339d253e5966ab8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* fix equals() and hashCode() methods to consider size
* fix toString() to show size
Change-Id: I5485db55eda5110121efd65d86c7166b3b2e93d0
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
David Pursehouse
Michael Keppler
Thomas Wolf
Matthias Sohn
Konrad Windszus
David Ostrovsky
Brandon Weeks
Sebastian Schuberth
Marc Strapetz
Ivan Frade
Andrey Loskutov
Dave Borowitz