Add an implementation for base-85 encoding and decoding [1]. Git binary
patches use this format.
Base-85 encoding assembles bytes as 32-bit MSB values, then converts
these values to base-85 numbers (always 5 bytes) encoded as printable
ASCII characters. Decoding base-85 is the reverse operation. Note
that decoding may overflow on invalid input as 85^5 > 2^32. Encodings
always have a length that is a multiple of 5. If input length is not
divisible by 4, padding bytes are (logically) added, which are ignored
when decoding. The encoding for n bytes has thus always exactly length
(n + 3) / 4 * 5 in integer arithmetic (truncating division).
Includes tests.
[1] https://datatracker.ietf.org/doc/html/rfc1924
Bug: 371725
Change-Id: Ib5b9a503cd62cf70e080a4fb38c8cd1eeeaebcfe
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Applying a patch on Windows failed if the patch had the (normal)
single-LF line endings, but the file on disk had the usual Windows
CR-LF line endings.
Git (and JGit) compute diffs on the git-internal blob, i.e., after
CR-LF transformation and clean filtering. Applying patches to files
directly is thus incorrect and may fail if CR-LF settings don't
match, or if clean/smudge filtering is involved.
Change ApplyCommand to run the file content through the check-in
filters before applying the patch, and run the result through the
check-out filters. This makes patch application succeed even if the
patch has single-LFs, but the file has CR-LF and core.autocrlf is
true.
Add tests for various combinations of line endings in the file and in
the patch, and a test to verify the clean/smudge handling.
See also [1].
Running the file though clean/smudge may give strange results with
LFS-managed files. JGit's DiffFormatter has some extra code and
applies the smudge filter again after having run the file through
the check-in filters (CR-LF and clean). So JGit can actually produce
a diff on LFS-managed files using the normal diff machinery. (If it
doesn't run out of memory, that is. After all, LFS is intended for
_large_ files.) How such a diff would be applied with either C git
or JGit is entirely unclear; neither has any code for this special
case. Compare also [2].
Note that C git just doesn't know about LFS and always diffs after
the check-in filter chain, so for LFS files, it'll produce a diff
of the LFS pointers.
[1] https://github.com/git/git/commit/c24f3abac
[2] https://github.com/git-lfs/git-lfs/issues/440
Bug: 571585
Change-Id: I8f71ff26313b5773ff1da612b0938ad2f18751f5
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Use Character.isWhitespace() instead of Character.isSpaceChar() to
treat TABs as whitespace, too.
Change-Id: Iffc59c13357d981ede6a1e0feb6ea6ff03fb3064
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Negated patterns were handled wrongly. According to the OpenBSD
ssh_config man page,[1] a negated pattern never matches. Negated
patterns make only sense if there are positive patterns; the
negated pattern then can define exceptions for the positive
patterns.
OpenSshConfigFile did this wrongly. It handled "!foo" as "matching
everything but foo", but actually the semantics is "if the input is
"foo", this entry doesn't apply. If the input is anything else,
other patterns determine whether the entry may apply.".
[1] https://man.openbsd.org/ssh_config
Change-Id: I50f6e46581b7ece4c949eddf62f4a265573ec29e
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
* stable-5.12:
Remove texts which were added by mistake in 00386272
Fix formatting which was broken in 00386272
Change-Id: I1c936183e1fa17ea95ada7849a75bc76af275fa3
* stable-5.11:
Remove texts which were added by mistake in 00386272
Fix formatting which was broken in 00386272
Change-Id: I6184772bdeca1b9ccecf6e400ae15604ab4f5a69
* stable-5.10:
Remove texts which were added by mistake in 00386272
Fix formatting which was broken in 00386272
Change-Id: I0f1511be5375716d41565e72b271cb956c3e847b
* stable-5.9:
Remove texts which were added by mistake in 00386272
Fix formatting which was broken in 00386272
Change-Id: Ifa135077d8d07d2317df3b479822e30d87eca950
* stable-5.8:
Remove texts which were added by mistake in 00386272
Fix formatting which was broken in 00386272
Change-Id: I9ca7a0237f87d1d4bcaba81e709eaa67902f27e5
* stable-5.7:
Remove texts which were added by mistake in 00386272
Fix formatting which was broken in 00386272
Change-Id: I7ed3f47cb46e6c1bf483702c8925a24e88658e47
* stable-5.6:
Remove texts which were added by mistake in 00386272
Fix formatting which was broken in 00386272
Change-Id: I45d444b360485564744bf3dfad2c2f5a5e7fcdf6
* stable-5.9:
LockFile: create OutputStream only when needed
Remove ReftableNumbersNotIncreasingException
Fix stamping to produce stable file timestamps
Change-Id: I056382d1d93f3e0a95838bdd1f0be89711c8a722
Don't create the stream eagerly in lock(); that may cause JGit to
exceed OS or JVM limits on open file descriptors if many locks need
to be created, for instance when creating many refs. Instead create
the output stream only when one really needs to write something.
Bug: 573328
Change-Id: If9441ed40494d46f594a896d34a5c4f56f91ebf4
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Don't create the stream eagerly in lock(); that may cause JGit to
exceed OS or JVM limits on open file descriptors if many locks need
to be created, for instance when creating many refs. Instead create
the output stream only when one really needs to write something.
Bug: 573328
Change-Id: If9441ed40494d46f594a896d34a5c4f56f91ebf4
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Git has different conflict resolution strategies:
* There is a tree merge strategy "ours" which just ignores any changes
from theirs ("-s ours"). JGit also has the mirror strategy "theirs"
ignoring any changes from "ours". (This doesn't exist in C git.)
Adapt StashApplyCommand and CherrypickCommand to be able to use those
tree merge strategies.
* For the resolve/recursive tree merge strategies, there are content
conflict resolution strategies "ours" and "theirs", which resolve
any conflict hunks by taking the "ours" or "theirs" hunk. In C git
those correspond to "-Xours" or -Xtheirs". Implement that in
MergeAlgorithm, and add API to set and pass through such a strategy
for resolving content conflicts.
* The "ours/theirs" content conflict resolution strategies also apply
for binary files. Handle these cases in ResolveMerger.
Note that the content conflict resolution strategies ("-X ours/theirs")
do _not_ apply to modify/delete or delete/modify conflicts. Such
conflicts are always reported as conflicts by C git. They do apply,
however, if one side completely clears a file's content.
Bug: 501111
Change-Id: I2c9c170c61c440a2ab9c387991e7a0c3ab960e07
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Similar to https://git.eclipse.org/r/c/jgit/jgit/+/175166, ignore
path that have conflicts on attributes, so that the virtual base could
be used by RecursiveMerger.
Change-Id: I99c95445a305558d55bbb9c9e97446caaf61c154
Signed-off-by: Marija Savtchouk <mariasavtchouk@google.com>
o.e.j.ssh.apache produces passphrase prompts containing
InformationalMessage items to show the fingerprint of the key
the passphrase is being asked for. Allow this so that the credentials
provider can be used with o.e.j.ssh.apache.
Change-Id: Ibc2ffd3a987d3118952726091b9b80442972dfd8
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
OpenSSH 8.4 has introduced simple environment variable substitution
for some keys. Implement that feature in our ssh config file parser,
too.
Bug: 572103
Change-Id: I360f2c5510eea4ec3329aeedf3d29dfefc9163f0
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
* stable-5.11:
Refactor CommitCommand to improve readability
CommitCommand: fix formatting
CommitCommand: remove unncessary comment
Ensure post-commit hook is called after index lock was released
sshd: try all configured signature algorithms for a key
sshd: modernize ssh config file parsing
sshd: implement ssh config PubkeyAcceptedAlgorithms
Change-Id: Ic3235ffd84c9d7537a1fe5ff4f216578e6e26724
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
OpenSSH has changed some things in ssh config files. Update our parser
to implement some of these changes:
* ignore trailing comments on a line
* rename PubkeyAcceptedKeyTypes to PubkeyAcceptedAlgorithms
Note that for the rename, openSSH still accepts both names. We do the
same, translating names whenever we get or set values.
Change-Id: Icccca060e6a4350a7acf05ff9e260f2c8c60ee1a
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Apache MINA sshd 2.6.0 appears to use only the first appropriate
public key signature algorithm for a particular key. See [1]. For
RSA keys, that is rsa-sha2-512. This breaks authentication at servers
that only know the older (and deprecated) ssh-rsa algorithm.
With PubkeyAcceptedAlgorithms, users can re-order algorithms in
the ssh config file per host, if needed. Setting
PubkeyAcceptedAlgorithms ^ssh-rsa
will put "ssh-rsa" at the front of the list of algorithms, and then
authentication at such servers with RSA keys works again.
[1] https://issues.apache.org/jira/browse/SSHD-1105
Bug: 572056
Change-Id: I86c3b93f05960c68936e80642965815926bb2532
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
In [1], improved RevWalk.getMergedInto() is introduced to avoid repeated
work while performing RevWalk.isMergedInto() on many refs. Modify
findBranchesReachableFrom() to use it.
[1] I65de9873dce67af9c415d1d236bf52d31b67e8fe
Change-Id: I81d615241638d4093df64b449637af601843a5ed
Signed-off-by: Adithya Chakilam <quic_achakila@quicinc.com>
In cases where we need to determine if a given commit is merged
into many refs, using isMergedInto(base, tip) for each ref would
cause multiple unwanted walks.
getMergedInto() marks the unreachable commits as uninteresting
which would then avoid walking that same path again.
Using the same api, also introduce isMergedIntoAny() and
isMergedIntoAll()
Change-Id: I65de9873dce67af9c415d1d236bf52d31b67e8fe
Signed-off-by: Adithya Chakilam <quic_achakila@quicinc.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
There are two code paths for detecting renames: one on tree diffs
(using DiffFormatter#scan) and the other on single file diffs (using
DiffFormatter#format). The latter skips binary and large files
for rename detection - check [1], but the former doesn't.
This change skips content rename detection for the tree diffs case for
large files. This is essential to avoid expensive computations while
reading the file, especially for callers who don't want to pay that
cost. Content renames are those which involve files with slightly
modified content. Exact renames will still be identified.
The default threshold for file sizes is reused from
PackConfig.DEFAULT_BIG_FILE_THRESHOLD: 50 MB.
[1] 232876421d/org.eclipse.jgit/src/org/eclipse/jgit/diff/RawText.java (386)
Change-Id: Idbc2c29bd381c6e387185204638f76fda47df41e
Signed-off-by: Youssef Elghareeb <ghareeb@google.com>
Git config http.cookieFile must have ~ expansion, compare [1].
It also should be an absolute path. While a relative path is allowed,
C git just passes the value on to libcurl, so it'll be relative to the
current working directory and thus not work in all directories.
Log a warning if the path is relative.
(Alternatives would be to throw an exception, or to resolve the path
relative to the .git directory, or relative to the working tree root,
or relative to the config file it occurs in. But C git does not seem
to do either.)
[1] https://github.com/git/git/commit/e5a39ad8e
Bug: 571798
Change-Id: I5cdab6061d0613ac7d8cb7977e5b97f5b88f562d
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Add new constructors to PackFile to improve a common use case where
callers know the directory, id, and extension, but previously needed to
construct a valid file name (with prefix, '.', etc) to create a
PackFile. Most callers can use the variant that has id as an ObjectId,
but provide an id as String variant too.
Change-Id: I39e4466abe8c9509f5916d5bfe675066570b8585
Signed-off-by: Nasser Grainawi <quic_nasserg@quicinc.com>
It's easier to follow the logic here when we can use our own objects
instead of Strings.
Change-Id: I6a166edcc67903fc1ca3544f458634c4cef8fde7
Signed-off-by: Nasser Grainawi <quic_nasserg@quicinc.com>
This class already looked very much like an Enum, but wasn't one.
As an Enum, we can use PackExt in EnumMaps and EnumSets. Convert the
Map key usage in PackDirectory to an EnumMap.
Change-Id: Ice097fd468a05805f914e6862fbd1d96ec8c45d1
Signed-off-by: Nasser Grainawi <quic_nasserg@quicinc.com>
Provide a recovery path for objects being referenced during the pack
pruning race. Due to the pack pruning race, it is possible for objects
to become referenced after a pack has been deemed safe to prune, but
before it actually gets pruned. If this happened previously, the newly
referenced objects would be missing and potentially result in a
corrupted ref.
Add the ability to recover from this situation when an object is missing
but happens to still be available in a pack in the "preserved"
directory. This is likely only useful when used in conjunction with the
--preserve-old-packs GC option, which prunes packs by hard-linking to
the preserved directory. If an object is missing and found in a pack in
the preserved directory, immediately recover that pack and its
associated files (idx, bitmaps...) by moving them back to the original
pack directory, and then retry the operation that would have failed due
to the missing object. This retry can now succeed and the repository
may avoid corruption. This approach should drastically reduce the
chance of a corrupt repository during pack pruning at very little extra
cost. This extra cost should only be incurred when objects are missing
and a failure would normally occur.
Change-Id: I2a704e3276b88cc892159d9bfe2455c6eec64252
Signed-off-by: Martin Fick <quic_mfick@quicinc.com>
Signed-off-by: Nasser Grainawi <quic_nasserg@quicinc.com>
The only extension that was ever consulted from the bitmap was the
bitmap index. We can simplify the Pack code as well as the code of
all the callers if we focus on just that usage.
Change-Id: I799ddfdee93142af67ce5081d14a430d36aa4c15
Signed-off-by: Nasser Grainawi <quic_nasserg@quicinc.com>
Thomas Wolf