Fix performance regression of a recent "fatten promisor pack with
local objects" protection against an unwanted gc.
* jt/fix-fattening-promisor-fetch:
index-pack --promisor: also check commits' trees
index-pack --promisor: don't check blobs
index-pack --promisor: dedup before checking links
"git tag" has been taught to refuse to create refs/tags/HEAD
as such a tag will be confusing in the context of UI provided by
the Git Porcelain commands.
* jc/forbid-head-as-tagname:
tag: "git tag" refuses to use HEAD as a tagname
t5604: do not expect that HEAD can be a valid tagname
refs: drop strbuf_ prefix from helpers
refs: move ref name helpers around
"git describe" optimization.
* jk/describe-perf:
describe: split "found all tags" and max_candidates logic
describe: stop traversing when we run out of names
describe: stop digging for max_candidates+1
t/perf: add tests for git-describe
t6120: demonstrate weakness in disjoint-root handling
Yet another "pass the repository through the callchain" topic.
* kn/midx-wo-the-repository:
midx: inline the `MIDX_MIN_SIZE` definition
midx: pass down `hash_algo` to functions using global variables
midx: pass `repository` to `load_multi_pack_index`
midx: cleanup internal usage of `the_repository` and `the_hash_algo`
midx-write: pass down repository to `write_midx_file[_only]`
write-midx: add repository field to `write_midx_context`
midx-write: use `revs->repo` inside `read_refs_snapshot`
midx-write: pass down repository to static functions
packfile.c: remove unnecessary prepare_packed_git() call
midx: add repository to `multi_pack_index` struct
config: make `packed_git_(limit|window_size)` non-global variables
config: make `delta_base_cache_limit` a non-global variable
packfile: pass down repository to `for_each_packed_object`
packfile: pass down repository to `has_object[_kept]_pack`
packfile: pass down repository to `odb_pack_name`
packfile: pass `repository` to static function in the file
packfile: use `repository` from `packed_git` directly
packfile: add repository to struct `packed_git`
"git fast-import" learned to reject paths with ".." and "." as
their components to avoid creating invalid tree objects.
* en/fast-import-verify-path:
t9300: test verification of renamed paths
fast-import: disallow more path components
fast-import: disallow "." and ".." path components
"git bundle --unbundle" and "git clone" running on a bundle file
both learned to trigger fsck over the new objects with configurable
fck check levels.
* jt/bundle-fsck:
transport: propagate fsck configuration during bundle fetch
fetch-pack: split out fsck config parsing
bundle: support fsck message configuration
bundle: add bundle verification options type
Loosen overly strict ownership check introduced in the recent past,
to keep the promise "cloning a suspicious repository is a safe
first step to inspect it".
* bc/allow-upload-pack-from-other-people:
Allow cloning from repositories owned by another user
Commit c08589efdc (index-pack: repack local links into promisor packs,
2024-11-01) seems to contain an oversight in that the tree of a commit
is not checked. Teach git to check these trees.
The fix slows down a fetch from a certain repo at $DAYJOB from 2m2.127s
to 2m45.052s, but in order to make the fetch correct, it seems worth it.
In order to test this, we could create server and client repos as
follows...
C S
\ /
O
(O and C are commits both on the client and server. S is a commit
only on the server. C and S have the same tree but different commit
messages. The diff between O and C is non-zero.)
...and then, from the client, fetch S from the server.
In theory, the client declares "have C" and the server can use this
information to exclude S's tree (since it knows that the client has C's
tree, which is the same as S's tree). However, it is also possible for
the server to compute that it needs to send S and not O, and proceed
from there; therefore the objects of C are not considered at all when
determining what to send in the packfile. In order to prevent a test of
client functionality from having such a dependence on server behavior, I
have not included such a test.
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As a follow-up to the parent of this commit, it was found that not
checking for the existence of blobs linked from trees sped up the fetch
from 24m47.815s to 2m2.127s. Teach Git to do that.
The tradeoff of not checking blobs is documented in a code comment.
(Blobs may also be linked from tag objects, but it is impossible to know
the type of an object linked from a tag object without looking it up in
the object database, so the code for that is untouched.)
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commit c08589efdc (index-pack: repack local links into promisor packs,
2024-11-01) fixed a bug with what was believed to be a negligible
decrease in performance [1] [2]. But at $DAYJOB, with at least one repo,
it was found that the decrease in performance was very significant.
Looking at the patch, whenever we parse an object in the packfile to
be indexed, we check the targets of all its outgoing links for its
existence. However, this could be optimized by first collecting all such
targets into an oidset (thus deduplicating them) before checking. Teach
Git to do that.
On a certain fetch from the aforementioned repo, this improved
performance from approximately 7 hours to 24m47.815s. This number will
be further reduced in a subsequent patch.
[1] https://lore.kernel.org/git/CAG1j3zGiNMbri8rZNaF0w+yP+6OdMz0T8+8_Wgd1R_p1HzVasg@mail.gmail.com/
[2] https://lore.kernel.org/git/20241105212849.3759572-1-jonathantanmy@google.com/
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commit a30154187a (describe: stop traversing when we run out of names,
2024-10-31) taught git-describe to automatically reduce the
max_candidates setting to match the total number of possible names. This
lets us break out of the traversal rather than fruitlessly searching for
more candidates when there are no more to be found.
However, setting max_candidates to 0 (e.g., if the repo has no tags)
overlaps with the --exact-match option, which explicitly uses the same
value. And this causes a regression with --always, which is ignored in
exact-match mode. We used to get this in a repo with no tags:
$ git describe --always HEAD
b2f0a7f
and now we get:
$ git describe --always HEAD
fatal: no tag exactly matches 'b2f0a7f47f5f2aebe1e7fceff19a57de20a78c06'
The reason is that we bail early in describe_commit() when
max_candidates is set to 0. This logic goes all the way back to
2c33f75754 (Teach git-describe --exact-match to avoid expensive tag
searches, 2008-02-24).
We should obviously fix this regression, but there are two paths,
depending on what you think:
$ git describe --always --exact-match
and
$ git describe --always --candidates=0
should do. Since the "--always" option was added, it has always been
ignored in --exact-match (or --candidates=0) mode. I.e., we treat
--exact-match as a true exact match of a tag, and never fall back to
using --always, even if it was requested.
If we think that's a bug (or at least a misfeature), then the right
solution is to fix it by removing the early bail-out from 2c33f75754,
letting the noop algorithm run and then hitting the --always fallback
output. And then our regression naturally goes away, because it follows
the same path.
If we think that the current "--exact-match --always" behavior is the
right thing, then we have to differentiate the case where we
automatically reduced max_candidates to 0 from the case where the user
asked for it specifically. That's possible to do with a flag, but we can
also just reimplement the logic from a30154187a to explicitly break out
of the traversal when we run out of candidates (rather than relying on
the existing max_candidates check).
My gut feeling is along the lines of option 1 (it's a bug, and people
would be happy for "--exact-match --always" to give the fallback rather
than ignoring "--always"). But the documentation can be interpreted in
the other direction, and we've certainly lived with the existing
behavior for many years. So it's possible that changing it now is the
wrong thing.
So this patch fixes the regression by taking the second option,
retaining the "--exact-match" behavior as-is. There are two new tests.
The first shows that the regression is fixed (we don't even need a new
repo without tags; a restrictive --match is enough to create the
situation that there are no candidate names).
The second test confirms that the "--exact-match --always" behavior
remains unchanged and continues to die when there is no tag pointing at
the specified commit. It's possible we may reconsider this in the
future, but this shows that the approach described above is implemented
faithfully.
We can also run the perf tests in p6100 to see that we've retained the
speedup that a30154187a was going for:
Test HEAD^ HEAD
--------------------------------------------------------------------------------------
6100.2: describe HEAD 0.72(0.64+0.07) 0.72(0.66+0.06) +0.0%
6100.3: describe HEAD with one max candidate 0.01(0.00+0.00) 0.01(0.00+0.00) +0.0%
6100.4: describe HEAD with one tag 0.01(0.01+0.00) 0.01(0.01+0.00) +0.0%
Reported-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In a previous commit, we passed the repository field to all
subcommands in the `builtin/` directory. Utilize this to pass the
repository field down to the `write_midx_file[_only]` functions to
remove the usage of `the_repository` global variables.
With this, all usage of global variables in `midx-write.c` is removed,
hence, remove the `USE_THE_REPOSITORY_VARIABLE` guard from the file.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* kn/pass-repo-to-builtin-sub-sub-commands:
builtin: pass repository to sub commands
Git 2.47.1
Makefile(s): avoid recipe prefix in conditional statements
doc: switch links to https
doc: update links to current pages
The eleventh batch
pack-objects: only perform verbatim reuse on the preferred pack
t5332-multi-pack-reuse.sh: demonstrate duplicate packing failure
test-lib: move malloc-debug setup after $PATH setup
builtin/difftool: intialize some hashmap variables
refspec: store raw refspecs inside refspec_item
refspec: drop separate raw_nr count
fetch: adjust refspec->raw_nr when filtering prefetch refspecs
test-lib: check malloc debug LD_PRELOAD before using
* kn/the-repository:
packfile.c: remove unnecessary prepare_packed_git() call
midx: add repository to `multi_pack_index` struct
config: make `packed_git_(limit|window_size)` non-global variables
config: make `delta_base_cache_limit` a non-global variable
packfile: pass down repository to `for_each_packed_object`
packfile: pass down repository to `has_object[_kept]_pack`
packfile: pass down repository to `odb_pack_name`
packfile: pass `repository` to static function in the file
packfile: use `repository` from `packed_git` directly
packfile: add repository to struct `packed_git`
Built-in Git subcommands are supplied the repository object to work
with; they learned to do the same when they invoke sub-subcommands.
* kn/pass-repo-to-builtin-sub-sub-commands:
builtin: pass repository to sub commands
"git fsck" learned to issue warnings on "curiously formatted" ref
contents that have always been taken valid but something Git
wouldn't have written itself (e.g., missing terminating end-of-line
after the full object name).
* sj/ref-contents-check:
ref: add symlink ref content check for files backend
ref: check whether the target of the symref is a ref
ref: add basic symref content check for files backend
ref: add more strict checks for regular refs
ref: port git-fsck(1) regular refs check for files backend
ref: support multiple worktrees check for refs
ref: initialize ref name outside of check functions
ref: check the full refname instead of basename
ref: initialize "fsck_ref_report" with zero
The migration procedure between two ref backends has been optimized.
* ps/ref-backend-migration-optim:
reftable: rename scratch buffer
refs: adapt `initial_transaction` flag to be unsigned
reftable/block: optimize allocations by using scratch buffer
reftable/block: rename `block_writer::buf` variable
reftable/writer: optimize allocations by using a scratch buffer
refs: don't normalize log messages with `REF_SKIP_CREATE_REFLOG`
refs: skip collision checks in initial transactions
refs: use "initial" transaction semantics to migrate refs
refs/files: support symbolic and root refs in initial transaction
refs: introduce "initial" transaction flag
refs/files: move logic to commit initial transaction
refs: allow passing flags when setting up a transaction
Leakfixes.
* ps/leakfixes-part-10: (27 commits)
t: remove TEST_PASSES_SANITIZE_LEAK annotations
test-lib: unconditionally enable leak checking
t: remove unneeded !SANITIZE_LEAK prerequisites
t: mark some tests as leak free
t5601: work around leak sanitizer issue
git-compat-util: drop now-unused `UNLEAK()` macro
global: drop `UNLEAK()` annotation
t/helper: fix leaking commit graph in "read-graph" subcommand
builtin/branch: fix leaking sorting options
builtin/init-db: fix leaking directory paths
builtin/help: fix leaks in `check_git_cmd()`
help: fix leaking return value from `help_unknown_cmd()`
help: fix leaking `struct cmdnames`
help: refactor to not use globals for reading config
builtin/sparse-checkout: fix leaking sanitized patterns
split-index: fix memory leak in `move_cache_to_base_index()`
git: refactor builtin handling to use a `struct strvec`
git: refactor alias handling to use a `struct strvec`
strvec: introduce new `strvec_splice()` function
line-log: fix leak when rewriting commit parents
...
Give a bit of advice/hint message when "git maintenance" stops finding a
lock file left by another instance that still is potentially running.
* ps/gc-stale-lock-warning:
t7900: fix host-dependent behaviour when testing git-maintenance(1)
builtin/gc: provide hint when maintenance hits a stale schedule lock
The variables `packed_git_window_size` and `packed_git_limit` are global
config variables used in the `packfile.c` file. Since it is only used in
this file, let's change it from being a global config variable to a
local variable for the subsystem.
With this, we rid `packfile.c` from all global variable usage and this
means we can also remove the `USE_THE_REPOSITORY_VARIABLE` guard from
the file.
Helped-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `delta_base_cache_limit` variable is a global config variable used
by multiple subsystems. Let's make this non-global, by adding this
variable independently to the subsystems where it is used.
First, add the setting to the `repo_settings` struct, this provides
access to the config in places where the repository is available. Use
this in `packfile.c`.
In `index-pack.c` we add it to the `pack_idx_option` struct and its
constructor. While the repository struct is available here, it may not
be set because `git index-pack` can be used without a repository.
In `gc.c` add it to the `gc_config` struct and also the constructor
function. The gc functions currently do not have direct access to a
repository struct.
These changes are made to remove the usage of `delta_base_cache_limit`
as a global variable in `packfile.c`. This brings us one step closer to
removing the `USE_THE_REPOSITORY_VARIABLE` definition in `packfile.c`
which we complete in the next patch.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The function `for_each_packed_object` currently relies on the global
variable `the_repository`. To eliminate global variable usage in
`packfile.c`, we should progressively shift the dependency on
the_repository to higher layers. Let's remove its usage from this
function and closely related function `is_promisor_object`.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The functions `has_object[_kept]_pack` currently rely on the global
variable `the_repository`. To eliminate global variable usage in
`packfile.c`, we should progressively shift the dependency on
the_repository to higher layers. Let's remove its usage from these
functions and any related ones.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The function `odb_pack_name` currently relies on the global variable
`the_repository`. To eliminate global variable usage in `packfile.c`, we
should progressively shift the dependency on the_repository to higher
layers.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The struct `packed_git` holds information regarding a packed object
file. Let's add the repository variable to this object, to represent the
repository that this packfile belongs to. This helps remove dependency
on the global `the_repository` object in `packfile.c` by simply using
repository information now readily available in the struct.
We do need to consider that a packfile could be part of the alternates
of a repository, but considering that we only have one repository struct
and also that we currently anyways use 'the_repository', we should be
OK with this change.
We also modify `alloc_packed_git` to ensure that the repository is added
to newly created `packed_git` structs. This requires modifying the
function and all its callee to pass the repository object down the
levels.
Helped-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The helper functions (strbuf_branchname, strbuf_check_branch_ref,
and strbuf_check_tag_ref) are about handling branch and tag names,
and it is a non-essential fact that these functions use strbuf to
hold these names. Rename them to make it clarify that these are
more about "ref".
Signed-off-by: Junio C Hamano <gitster@pobox.com>
strbuf_branchname(), strbuf_check_{branch,tag}_ref() are helper
functions to deal with branch and tag names, and the fact that they
happen to use strbuf to hold the name of a branch or a tag is not
essential. These functions fit better in the refs API than strbuf
API, the latter of which is about string manipulations.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Instead of just disallowing '.' and '..', make use of verify_path() to
ensure that fast-import will disallow anything we wouldn't allow into
the index, such as anything under .git/, .gitmodules as a symlink, or
a dos drive prefix on Windows.
Since a few fast-export and fast-import tests that tried to stress-test
the correct handling of quoting relied on filenames that fail
is_valid_win32_path(), such as spaces or periods at the end of filenames
or backslashes within the filename, turn off core.protectNTFS for those
tests to ensure they keep passing.
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This teaches the `worktree repair` command to respect the
`--[no-]relative-paths` CLI option and `worktree.useRelativePaths`
config setting. If an existing worktree with an absolute path is repaired
with `--relative-paths`, the links will be replaced with relative paths,
even if the original path was correct. This allows a user to covert
existing worktrees between absolute/relative as desired.
To simplify things, both linking files are written when one of the files
needs to be repaired. In some cases, this fixes the other file before it
is checked, in other cases this results in a correct file being written
with the same contents.
Signed-off-by: Caleb White <cdwhite3@pm.me>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This teaches the `worktree move` command to respect the
`--[no-]relative-paths` CLI option and `worktree.useRelativePaths`
config setting. If an existing worktree is moved with `--relative-paths`
the new path will be relative (and visa-versa).
Signed-off-by: Caleb White <cdwhite3@pm.me>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This introduces the `--[no-]relative-paths` CLI option and
`worktree.useRelativePaths` configuration setting to the `worktree add`
command. When enabled these options allow worktrees to be linked using
relative paths, enhancing portability across environments where absolute
paths may differ (e.g., containerized setups, shared network drives).
Git still creates absolute paths by default, but these options allow
users to opt-in to relative paths if desired.
The t2408 test file is removed and more comprehensive tests are
written for the various worktree operations in their own files.
Signed-off-by: Caleb White <cdwhite3@pm.me>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When `unbundle()` is invoked, fsck verification may be configured by
passing the `VERIFY_BUNDLE_FSCK` flag. This mechanism allows fsck checks
on the bundle to be enabled or disabled entirely. To facilitate more
fine-grained fsck configuration, additional context must be provided to
`unbundle()`.
Introduce the `unbundle_opts` type, which wraps the existing
`verify_bundle_flags`, to facilitate future extension of `unbundle()`
configuration. Also update `unbundle()` and its call sites to accept
this new options type instead of the flags directly. The end behavior is
functionally the same, but allows for the set of configurable options to
be extended. This is leveraged in a subsequent commit to enable fsck
message severity configuration.
Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We now ensure "index-pack" is used with the "--promisor" option
only during a "git fetch".
* jt/index-pack-allow-promisor-only-while-fetching:
index-pack: teach --promisor to forbid pack name
"git fast-import" can be tricked into a replace ref that maps an
object to itself, which is a useless thing to do.
* en/fast-import-avoid-self-replace:
fast-import: avoid making replace refs point to themselves
In 9b1cb5070f (builtin: add a repository parameter for builtin
functions, 2024-09-13) the repository was passed down to all builtin
commands. This allowed the repository to be passed down to lower layers
without depending on the global `the_repository` variable.
Continue this work by also passing down the repository parameter from
the command to sub-commands. This will help pass down the repository to
other subsystems and cleanup usage of global variables like
'the_repository' and 'the_hash_algo'.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If a user specified e.g.
M 100644 :1 ../some-file
then fast-import previously would happily create a git history where
there is a tree in the top-level directory named "..", and with a file
inside that directory named "some-file". The top-level ".." directory
causes problems. While git checkout will die with errors and fsck will
report hasDotdot problems, the user is going to have problems trying to
remove the problematic file. Simply avoid creating this bad history in
the first place.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Object reuse code based on multi-pack-index sent an unwanted copy
of object.
* tb/multi-pack-reuse-dupfix:
pack-objects: only perform verbatim reuse on the preferred pack
t5332-multi-pack-reuse.sh: demonstrate duplicate packing failure
Double-free fix.
* jk/fetch-prefetch-double-free-fix:
refspec: store raw refspecs inside refspec_item
refspec: drop separate raw_nr count
fetch: adjust refspec->raw_nr when filtering prefetch refspecs
There are two users of `UNLEAK()` left in our codebase:
- In "builtin/clone.c", annotating the `repo` variable. That leak has
already been fixed though as you can see in the context, where we do
know to free `repo_to_free`.
- In "builtin/diff.c", to unleak entries of the `blob[]` array. That
leak has also been fixed, because the entries we assign to that
array come from `rev.pending.objects`, and we do eventually release
`rev`.
This neatly demonstrates one of the issues with `UNLEAK()`: it is quite
easy for the annotation to become stale. A second issue is that its
whole intent is to paper over leaks. And while that has been a necessary
evil in the past, because Git was leaking left and right, it isn't
really much of an issue nowadays where our test suite has no known leaks
anymore.
Remove the last two users of this macro.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The sorting options are leaking, but given that they are marked with
`UNLEAK()` the leak sanitizer doesn't complain.
Fix the leak by creating a common exit path and clearing the vector such
that we can get rid of the `UNLEAK()` annotation entirely.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We've got a couple of leaking directory paths in git-init(1), all of
which are marked with `UNLEAK()`. Fixing them is trivial, so let's do
that instead so that we can get rid of `UNLEAK()` entirely.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `check_git_cmd()` function is declared to return a string constant.
And while it sometimes does return a constant, it may also return an
allocated string in two cases:
- When handling aliases. This case is already marked with `UNLEAK()`
to work around the leak.
- When handling unknown commands in case "help.autocorrect" is
enabled. This one is not marked with `UNLEAK()`.
The function only has a single caller, so let's fix its return type to
be non-constant, consistently return an allocated string and free it at
its callsite to plug the leak.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Both `git sparse-checkout add` and `git sparse-checkout set` accept a
list of additional directories or patterns. These get massaged via calls
to `sanitize_paths()`, which may end up modifying the passed-in array by
updating its pointers to be prefixed paths. This allocates memory that
we never free.
Refactor the code to instead use a `struct strvec`, which makes it way
easier for us to track the lifetime correctly. The couple of extra
memory allocations likely do not matter as we only ever populate it with
command line arguments.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When passing `--incremental` to git-blame(1) we exit early by jumping to
the `cleanup` label. But some of the cleanups we perform are handled
between the `goto` and its label, and thus we leak the data.
Move the cleanups after the `cleanup` label. While at it, move the logic
to free the scoreboard's `final_buf` into `cleanup_scoreboard()` and
drop its `const` declaration.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We have already set up the infrastructure to check the consistency for
refs, but we do not support multiple worktrees. However, "git-fsck(1)"
will check the refs of worktrees. As we decide to get feature parity
with "git-fsck(1)", we need to set up support for multiple worktrees.
Because each worktree has its own specific refs, instead of just showing
the users "refs/worktree/foo", we need to display the full name such as
"worktrees/<id>/refs/worktree/foo". So we should know the id of the
worktree to get the full name. Add a new parameter "struct worktree *"
for "refs-internal.h::fsck_fn". Then change the related functions to
follow this new interface.
The "packed-refs" only exists in the main worktree, so we should only
check "packed-refs" in the main worktree. Use "is_main_worktree" method
to skip checking "packed-refs" in "packed_fsck" function.
Then, enhance the "files-backend.c::files_fsck_refs_dir" function to add
"worktree/<id>/" prefix when we are not in the main worktree.
Last, add a new test to check the refname when there are multiple
worktrees to exercise the code.
Mentored-by: Patrick Steinhardt <ps@pks.im>
Mentored-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: shejialuo <shejialuo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano