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In 036876a1067 (config: hide functions using `the_repository` by
default, 2024-08-13) we have moved around a bunch of functions in the
config subsystem that depend on `the_repository`. Those function have
been converted into mere wrappers around their equivalent function that
takes in a repository as parameter, and the intent was that we'll
eventually remove those wrappers to make the dependency on the global
repository variable explicit at the callsite.
Follow through with that intent and remove
`git_config_get_multivar_gently()`. All callsites are adjusted so that
they use `repo_config_get_multivar_gently(the_repository, ...)` instead.
While some callsites might already have a repository available, this
mechanical conversion is the exact same as the current situation and
thus cannot cause any regression. Those sites should eventually be
cleaned up in a later patch series.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In 036876a1067 (config: hide functions using `the_repository` by
default, 2024-08-13) we have moved around a bunch of functions in the
config subsystem that depend on `the_repository`. Those function have
been converted into mere wrappers around their equivalent function that
takes in a repository as parameter, and the intent was that we'll
eventually remove those wrappers to make the dependency on the global
repository variable explicit at the callsite.
Follow through with that intent and remove `git_config_set_gently()`.
All callsites are adjusted so that they use
`repo_config_set_gently(the_repository, ...)` instead. While some
callsites might already have a repository available, this mechanical
conversion is the exact same as the current situation and thus cannot
cause any regression. Those sites should eventually be cleaned up in a
later patch series.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In 036876a1067 (config: hide functions using `the_repository` by
default, 2024-08-13) we have moved around a bunch of functions in the
config subsystem that depend on `the_repository`. Those function have
been converted into mere wrappers around their equivalent function that
takes in a repository as parameter, and the intent was that we'll
eventually remove those wrappers to make the dependency on the global
repository variable explicit at the callsite.
Follow through with that intent and remove `git_config_get_string()`.
All callsites are adjusted so that they use
`repo_config_get_string(the_repository, ...)` instead. While some
callsites might already have a repository available, this mechanical
conversion is the exact same as the current situation and thus cannot
cause any regression. Those sites should eventually be cleaned up in a
later patch series.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The branch structure has both branch->merge_name and branch->merge for
tracking the merge information. The former is allocated by add_merge()
and stores the names read from the configuration file. The latter is
allocated by set_merge() which is called by branch_get() when an
external caller requests a branch.
This leads to the confusing situation where branch->merge_nr tracks both
the size of branch->merge (once its allocated) and branch->merge_name.
The branch_release() function incorrectly assumes that branch->merge is
always set when branch->merge_nr is non-zero, and can potentially crash
if read_config() is called without branch_get() being called on every
branch.
In addition, branch_release() fails to free some of the memory
associated with the structure including:
* Failure to free the refspec_item containers in branch->merge[i]
* Failure to free the strings in branch->merge_name[i]
* Failure to free the branch->merge_name parent array.
The set_merge() function sets branch->merge_nr to 0 when there is no
valid remote_name, to avoid external callers seeing a non-zero merge_nr
but a NULL merge array. This results in failure to release most of the
merge data as well.
These issues could be fixed directly, and indeed I initially proposed
such a change at [1] in the past. While this works, there was some
confusion during review because of the inconsistencies.
Instead, its time to clean up the situation properly. Remove
branch->merge_name entirely. Instead, allocate branch->merge earlier
within add_merge() instead of within set_merge(). Instead of having
set_merge() copy from merge_name[i] to merge[i]->src, just have
add_merge() directly initialize merge[i]->src.
Modify the add_merge() to call xstrdup() itself, instead of having
the caller of add_merge() do so. This makes it more obvious which code
owns the memory.
Update all callers which use branch->merge_name[i] to use
branch->merge[i]->src instead.
Add a merge_clear() function which properly releases all of the
merge-related memory, and which sets branch->merge_nr to zero. Use this
both in branch_release() and in set_merge(), fixing the leak when
set_merge() finds no valid remote_name.
Add a set_merge variable to the branch structure, which indicates
whether set_merge() has been called. This replaces the previous use of a
NULL check against the branch->merge array.
With these changes, the merge array is always allocated when merge_nr is
non-zero.
This use of refspec_item to store the names should be safe. External
callers should be using branch_get() to obtain a pointer to the branch,
which will call set_merge(), and the callers internal to remote.c
already handle the partially initialized refpsec_item structure safely.
This end result is cleaner, and avoids duplicating the merge names
twice.
Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Link: [1] https://lore.kernel.org/git/20250617-jk-submodule-helper-use-url-v2-1-04cbb003177d@gmail.com/
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The `null_oid()` function returns the object ID that only consists of
zeroes. Naturally, this ID also depends on the hash algorithm used, as
the number of zeroes is different between SHA1 and SHA256. Consequently,
the function returns the hash-algorithm-specific null object ID.
This is currently done by depending on `the_hash_algo`, which implicitly
makes us depend on `the_repository`. Refactor the function to instead
pass in the hash algorithm for which we want to retrieve the null object
ID. Adapt callsites accordingly by passing in `the_repository`, thus
bubbling up the dependency on that global variable by one layer.
There are a couple of trivial exceptions for subsystems that already got
rid of `the_repository`. These subsystems instead use the repository
that is available via the calling context:
- "builtin/grep.c"
- "grep.c"
- "refs/debug.c"
There are also two non-trivial exceptions:
- "diff-no-index.c": Here we know that we may not have a repository
initialized at all, so we cannot rely on `the_repository`. Instead,
we adapt `diff_no_index()` to get a `struct git_hash_algo` as
parameter. The only caller is located in "builtin/diff.c", where we
know to call `repo_set_hash_algo()` in case we're running outside of
a Git repository. Consequently, it is fine to continue passing
`the_repository->hash_algo` even in this case.
- "builtin/ls-files.c": There is an in-flight patch series that drops
`USE_THE_REPOSITORY_VARIABLE` in this file, which causes a semantic
conflict because we use `null_oid()` in `show_submodule()`. The
value is passed to `repo_submodule_init()`, which may use the object
ID to resolve a tree-ish in the superproject from which we want to
read the submodule config. As such, the object ID should refer to an
object in the superproject, and consequently we need to use its hash
algorithm.
This means that we could in theory just not bother about this edge
case at all and just use `the_repository` in "diff-no-index.c". But
doing so would feel misdesigned.
Remove the `USE_THE_REPOSITORY_VARIABLE` preprocessor define in
"hash.c".
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The `get_worktree_git_dir()` function returns a string constant that
does not need to be free'd by the caller. This string is computed for
three different cases:
- If we don't have a worktree we return a path into the Git directory.
The returned string is owned by `the_repository`, so there is no
need for the caller to free it.
- If we have a worktree, but no worktree ID then the caller requests
the main worktree. In this case we return a path into the common
directory, which again is owned by `the_repository` and thus does
not need to be free'd.
- In the third case, where we have an actual worktree, we compute the
path relative to "$GIT_COMMON_DIR/worktrees/". This string does not
need to be released either, even though `git_common_path()` ends up
allocating memory. But this doesn't result in a memory leak either
because we write into a buffer returned by `get_pathname()`, which
returns one out of four static buffers.
We're about to drop `git_common_path()` in favor of `repo_common_path()`,
which doesn't use the same mechanism but instead returns an allocated
string owned by the caller. While we could adapt `get_worktree_git_dir()`
to also use `get_pathname()` and print the derived common path into that
buffer, the whole schema feels a lot like premature optimization in this
context. There are some callsites where we call `get_worktree_git_dir()`
in a loop that iterates through all worktrees. But none of these loops
seem to be even remotely in the hot path, so saving a single allocation
there does not feel worth it.
Refactor the function to instead consistently return an allocated path
so that we can start using `repo_common_path()` in a subsequent commit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"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
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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>
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Allow passing flags when setting up a transaction such that the
behaviour of the transaction itself can be altered. This functionality
will be used in a subsequent patch.
Adapt callers accordingly.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The submodule entry list returned by `submodules_of_tree()` is never
completely free'd by its only caller. Introduce a new function that
free's the list for us and call it.
While at it, also fix the leaking `branch_point` string.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In "branch.c" we modify the global `log_all_ref_updates` variable to
force creation of a reflog entry. Modifying global state like this is
discouraged, as it may have all kinds of consequences in other places of
our codebase.
Stop modifying the variable and pass the `REF_FORCE_CREATE_REFLOG` flag
instead. Setting this flag has a stronger meaning than setting the
config to `LOG_REFS_NORMAL`:
- `LOG_REFS_NORMAL` will ask us to only create reflog entries for
preexisting reflogs or branches, remote refs, note refs and HEAD.
- `REF_FORCE_CREATE_REFLOG` will unconditionally create a reflog and
is thus equivalent to `LOG_REFS_ALWAYS`.
But as we are in `create_branch()` and thus do not have to worry about
arbitrary references, but only about branches, `LOG_REFS_NORMAL` and
`LOG_REFS_ALWAYS` are indeed equivalent.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Use of the `the_repository` variable is deprecated nowadays, and we
slowly but steadily convert the codebase to not use it anymore. Instead,
callers should be passing down the repository to work on via parameters.
It is hard though to prove that a given code unit does not use this
variable anymore. The most trivial case, merely demonstrating that there
is no direct use of `the_repository`, is already a bit of a pain during
code reviews as the reviewer needs to manually verify claims made by the
patch author. The bigger problem though is that we have many interfaces
that implicitly rely on `the_repository`.
Introduce a new `USE_THE_REPOSITORY_VARIABLE` macro that allows code
units to opt into usage of `the_repository`. The intent of this macro is
to demonstrate that a certain code unit does not use this variable
anymore, and to keep it from new dependencies on it in future changes,
be it explicit or implicit
For now, the macro only guards `the_repository` itself as well as
`the_hash_algo`. There are many more known interfaces where we have an
implicit dependency on `the_repository`, but those are not guarded at
the current point in time. Over time though, we should start to add
guards as required (or even better, just remove them).
Define the macro as required in our code units. As expected, most of our
code still relies on the global variable. Nearly all of our builtins
rely on the variable as there is no way yet to pass `the_repository` to
their entry point. For now, declare the macro in "biultin.h" to keep the
required changes at least a little bit more contained.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Updates to symbolic refs can now be made as a part of ref
transaction.
* kn/ref-transaction-symref:
refs: remove `create_symref` and associated dead code
refs: rename `refs_create_symref()` to `refs_update_symref()`
refs: use transaction in `refs_create_symref()`
refs: add support for transactional symref updates
refs: move `original_update_refname` to 'refs.c'
refs: support symrefs in 'reference-transaction' hook
files-backend: extract out `create_symref_lock()`
refs: accept symref values in `ref_transaction_update()`
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Apply the rules that rewrite callers of "refs" interfaces to explicitly
pass `struct ref_store`. The resulting patch has been applied with the
`--whitespace=fix` option.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The function `ref_transaction_update()` obtains ref information and
flags to create a `ref_update` and add them to the transaction at hand.
To extend symref support in transactions, we need to also accept the
old and new ref targets and process it. This commit adds the required
parameters to the function and modifies all call sites.
The two parameters added are `new_target` and `old_target`. The
`new_target` is used to denote what the reference should point to when
the transaction is applied. Some functions allow this parameter to be
NULL, meaning that the reference is not changed.
The `old_target` denotes the value the reference must have before the
update. Some functions allow this parameter to be NULL, meaning that the
old value of the reference is not checked.
We also update the internal function `ref_transaction_add_update()`
similarly to take the two new parameters.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Spellfix.
* pf/commitish-committish:
typo: replace 'commitish' with 'committish'
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Across only three files, comments and a single function name used
'commitish' rather than 'commit-ish' or 'committish' as the spelling.
The git glossary accepts a hyphen or a double-t, but not a single-t.
Despite the typo in a translation file, none of the typos appear in
user-visible locations.
Signed-off-by: Pi Fisher <Pi.L.D.Fisher@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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git-branch(1) will error out if you give it a bad ref name. But the user
might not understand why or what part of the name is illegal.
The user might know that there are some limitations based on the *loose
ref* format (filenames), but there are also further rules for
easier integration with shell-based tools, pathname expansion, and
playing well with reference name expressions.
The man page for git-check-ref-format(1) contains these rules. Let’s
advise about it since that is not a command that you just happen
upon. Also make this advise configurable since you might not want to be
reminded every time you make a little typo.
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Similar to the preceding conversion of the AUTO_MERGE pseudo-ref, let's
convert the MERGE_AUTOSTASH ref to become a normal pseudo-ref as well.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In 70c70de616 (refs: complete list of special refs, 2023-12-14) we have
inrtoduced a new `is_special_ref()` function that classifies some refs
as being special. The rule is that special refs are exclusively read and
written via the filesystem directly, whereas normal refs exclucsively go
via the refs API.
The intent of that commit was to record the status quo so that we know
to route reads of such special refs consistently. Eventually, the list
should be reduced to its bare minimum of refs which really are special,
namely FETCH_HEAD and MERGE_HEAD.
Follow up on this promise and convert the AUTO_MERGE ref to become a
normal pseudo-ref by using the refs API to both read and write it
instead of accessing the filesystem directly.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git status" is taught to show both the branch being bisected and
being rebased when both are in effect at the same time.
* rj/status-bisect-while-rebase:
status: fix branch shown when not only bisecting
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In 83c750acde (wt-status.*: better advice for git status added,
2012-06-05), git-status received new informative messages to describe
the ongoing work in a worktree.
These messages were enhanced in 0722c805d6 (status: show the branch name
if possible in in-progress info, 2013-02-03), to show, if possible, the
branch where the operation was initiated.
Since then, we show incorrect information when several operations are in
progress and one of them is bisect:
$ git checkout -b foo
$ GIT_SEQUENCE_EDITOR='echo break >' git rebase -i HEAD~
$ git checkout -b bar
$ git bisect start
$ git status
...
You are currently editing a commit while rebasing branch 'bar' on '...'.
You are currently bisecting, started from branch 'bar'.
...
Note that we erroneously say "while rebasing branch 'bar'" when we
should be referring to "foo".
This must have gone unnoticed for so long because it must be unusual to
start a bisection while another operation is in progress. And even less
usual to involve different branches.
It caught my attention reviewing a leak introduced in 8b87cfd000
(wt-status: move strbuf into read_and_strip_branch(), 2013-03-16).
A simple change to deal with this situation can be to record in struct
wt_status_state, the branch where the bisect starts separately from the
branch related to other operations.
Let's do it and so we'll be able to display correct information and
we'll avoid the leak as well.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Let's update the error message we show when the user tries to check out
a branch which is being used in another worktree, following the
guideline reasoned in 4970bedef2 (branch: update the message to refuse
touching a branch in-use, 2023-07-21).
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "git branch -f" command can refuse to force-update a branch that
is used by another worktree. The original rationale for this
behaviour was that updating a branch that is checked out in another
worktree, without making a matching change to the index and the
working tree files in that worktree, will lead to a very confused
user. "git diff HEAD" will no longer give a useful patch, because
HEAD is a commit unrelated to what the index and the working tree in
the worktree were based on, for example.
These days, the same mechanism also protects branches that are being
rebased or bisected, and the same machanism is expected to be the
right place to add more checks, when we decide to protect branches
undergoing other kinds of operations. We however forgot to rethink
the messaging, which originally said that we are refusing to touch
the branch because it is "checked out" elsewhere, when d2ba271a
(branch: check for bisects and rebases, 2022-06-14) started to
protect branches that are being rebased or bisected.
The spirit of the check has always been that we do not want to
disrupt the use of the same branch in other worktrees. Let's reword
the message slightly to say that the branch is "used by" another
worktree, instead of "checked out".
We could teach the branch.c:prepare_checked_out_branches() function
to remember why it decided that a particular branch needs protecting
(i.e. was it because it was checked out? being bisected? something
else?) in addition to which worktree the branch was in use, and use
that in the error message to say "you cannot force update this
branch because it is being bisected in the worktree X", etc., but it
is dubious that such extra complexity is worth it. The message
already tells which directory the worktree in question is, and it
should be just a "chdir" away for the user to find out what state it
is in, if the user felt curious enough. So let's not go there yet.
Helped-by: Josh Sref <jsoref@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Header files cleanup.
* en/header-split-cache-h-part-3: (28 commits)
fsmonitor-ll.h: split this header out of fsmonitor.h
hash-ll, hashmap: move oidhash() to hash-ll
object-store-ll.h: split this header out of object-store.h
khash: name the structs that khash declares
merge-ll: rename from ll-merge
git-compat-util.h: remove unneccessary include of wildmatch.h
builtin.h: remove unneccessary includes
list-objects-filter-options.h: remove unneccessary include
diff.h: remove unnecessary include of oidset.h
repository: remove unnecessary include of path.h
log-tree: replace include of revision.h with simple forward declaration
cache.h: remove this no-longer-used header
read-cache*.h: move declarations for read-cache.c functions from cache.h
repository.h: move declaration of the_index from cache.h
merge.h: move declarations for merge.c from cache.h
diff.h: move declaration for global in diff.c from cache.h
preload-index.h: move declarations for preload-index.c from elsewhere
sparse-index.h: move declarations for sparse-index.c from cache.h
name-hash.h: move declarations for name-hash.c from cache.h
run-command.h: move declarations for run-command.c from cache.h
...
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This also made it clear that several .c files that depended upon path.h
were missing a #include for it; add the missing includes while at it.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In bdaf1dfae7 (branch: new autosetupmerge option "simple" for matching
branches, 2022-04-29) a new exit for setup_tracking() missed the
clean-up, producing a leak.
$ git config branch.autoSetupMerge simple
$ git remote add local .
$ git update-ref refs/remotes/local/foo HEAD
$ git branch bar local/foo
Direct leak of 384 byte(s) in 1 object(s) allocated from:
... in xrealloc wrapper.c
... in string_list_append_nodup string-list.c
... in find_tracked_branch branch.c
... in for_each_remote remote.c
... in setup_tracking branch.c
... in create_branch branch.c
... in cmd_branch builtinbranch.c
... in run_builtin git.c
Indirect leak of 24 byte(s) in 1 object(s) allocated from:
... in xrealloc wrapper.c
... in strbuf_grow strbuf.c
... in strbuf_add strbuf.c
... in match_name_with_pattern remote.c
... in query_refspecs remote.c
... in remote_find_tracking remote.c
... in find_tracked_branch branch.c
... in for_each_remote remote.c
... in setup_tracking branch.c
... in create_branch branch.c
... in cmd_branch builtinbranch.c
... in run_builtin git.c
The return introduced in bdaf1dfae7 was to avoid setting up the
tracking, but even in that case it is still necessary to do the
clean-up. Let's do it.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The commit d3115660b4 (branch: add flags and config to inherit tracking,
2021-12-20) replaced in "struct tracking", the member "char *src" by a
new "struct string_list *srcs".
This caused a modification in find_tracked_branch(). The string
returned by remote_find_tracking(), previously assigned to "src", is now
added to the string_list "srcs".
That string_list is initialized with STRING_LIST_INIT_DUP, which means
that what is added is not the given string, but a duplicate. Therefore,
the string returned by remote_find_tracking() is leaked.
The leak can be reviewed with:
$ git branch foo
$ git remote add local .
$ git fetch local
$ git branch --track bar local/foo
Direct leak of 24 byte(s) in 1 object(s) allocated from:
... in xrealloc wrapper.c
... in strbuf_grow strbuf.c
... in strbuf_add strbuf.c
... in match_name_with_pattern remote.c
... in query_refspecs remote.c
... in remote_find_tracking remote.c
... in find_tracked_branch branch.c
... in for_each_remote remote.c
... in setup_tracking branch.c
... in create_branch branch.c
... in cmd_branch builtin/branch.c
... in run_builtin git.c
Let's fix the leak, using the "_nodup" API to add to the string_list.
This way, the string itself will be added instead of being strdup()'d.
And when the string_list is cleared, the string will be freed.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Let's fix a leak we have in check_tracking_branch() since the function
was introduced in 41c21f22d0 (branch.c: Validate tracking branches with
refspecs instead of refs/remotes/*, 2013-04-21).
The leak can be reviewed with:
$ git remote add local .
$ git update-ref refs/remotes/local/foo HEAD
$ git branch --track bar local/foo
Direct leak of 24 byte(s) in 1 object(s) allocated from:
... in xrealloc wrapper.c
... in strbuf_grow strbuf.c
... in strbuf_add strbuf.c
... in match_name_with_pattern remote.c
... in query_refspecs remote.c
... in remote_find_tracking remote.c
... in check_tracking_branch branch.c
... in for_each_remote remote.c
... in validate_remote_tracking_branch branch.c
... in dwim_branch_start branch.c
... in create_branch branch.c
... in cmd_branch builtin/branch.c
... in run_builtin git.c
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In d3115660b4 (branch: add flags and config to inherit tracking,
2021-12-20) a new option was introduced to allow creating a new branch,
inheriting the tracking of another branch.
The new code, strdup()'d the remote_name of the existing branch, but
unfortunately it was not freed, producing a leak.
$ git remote add local .
$ git update-ref refs/remotes/local/foo HEAD
$ git branch --track bar local/foo
branch 'bar' set up to track 'local/foo'.
$ git branch --track=inherit baz bar
branch 'baz' set up to track 'local/foo'.
Direct leak of 6 byte(s) in 1 object(s) allocated from:
... in xstrdup wrapper.c
... in inherit_tracking branch.c
... in setup_tracking branch.c
... in create_branch branch.c
... in cmd_branch builtin/branch.c
... in run_builtin git.c
Actually, the string we're strdup()'ing is from the struct branch
returned by get_branch(). Which, in turn, retrieves the string from the
global "struct repository". This makes perfectly valid to use the
string throughout the entire execution of create_branch(). There is no
need to duplicate it.
Let's fix the leak, removing the strdup().
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In e89f151db1 (branch: move --set-upstream-to behavior to
dwim_and_setup_tracking(), 2022-01-28) the string returned by
dwim_branch_start() was not freed, resulting in a memory leak.
It can be reviewed with:
$ git remote add local .
$ git update-ref refs/remotes/local/foo HEAD
$ git branch --set-upstream-to local/foo foo
Direct leak of 23 byte(s) in 1 object(s) allocated from:
... in xstrdup wrapper.c
... in expand_ref refs.c
... in repo_dwim_ref refs.c
... in dwim_branch_start branch.c
... in dwim_and_setup_tracking branch.c
... in cmd_branch builtin/branch.c
... in run_builtin git.c
Let's free it now.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Error messages given when working on an unborn branch that is
checked out in another worktree have been improved.
* rj/branch-unborn-in-other-worktrees:
branch: avoid unnecessary worktrees traversals
branch: rename orphan branches in any worktree
branch: description for orphan branch errors
branch: use get_worktrees() in copy_or_rename_branch()
branch: test for failures while renaming branches
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hash.h depends upon and includes repository.h, due to the definition and
use of the_hash_algo (defined as the_repository->hash_algo). However,
most headers trying to include hash.h are only interested in the layout
of the structs like object_id. Move the parts of hash.h that do not
depend upon repository.h into a new file hash-ll.h (the "low level"
parts of hash.h), and adjust other files to use this new header where
the convenience inline functions aren't needed.
This allows hash.h and object.h to be fairly small, minimal headers. It
also exposes a lot of hidden dependencies on both path.h (which was
brought in by repository.h) and repository.h (which was previously
implicitly brought in by object.h), so also adjust other files to be
more explicit about what they depend upon.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Dozens of files made use of advice functions, without explicitly
including advice.h. This made it more difficult to find which files
could remove a dependence on cache.h. Make C files explicitly include
advice.h if they are using it.
Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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en/header-split-cache-h
* ab/remove-implicit-use-of-the-repository:
libs: use "struct repository *" argument, not "the_repository"
post-cocci: adjust comments for recent repo_* migration
cocci: apply the "revision.h" part of "the_repository.pending"
cocci: apply the "rerere.h" part of "the_repository.pending"
cocci: apply the "refs.h" part of "the_repository.pending"
cocci: apply the "promisor-remote.h" part of "the_repository.pending"
cocci: apply the "packfile.h" part of "the_repository.pending"
cocci: apply the "pretty.h" part of "the_repository.pending"
cocci: apply the "object-store.h" part of "the_repository.pending"
cocci: apply the "diff.h" part of "the_repository.pending"
cocci: apply the "commit.h" part of "the_repository.pending"
cocci: apply the "commit-reach.h" part of "the_repository.pending"
cocci: apply the "cache.h" part of "the_repository.pending"
cocci: add missing "the_repository" macros to "pending"
cocci: sort "the_repository" rules by header
cocci: fix incorrect & verbose "the_repository" rules
cocci: remove dead rule from "the_repository.pending.cocci"
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As can easily be seen from grepping in our sources, we had these uses
of "the_repository" in various library code in cases where the
function in question was already getting a "struct repository *"
argument. Let's use that argument instead.
Out of these changes only the changes to "cache-tree.c",
"commit-reach.c", "shallow.c" and "upload-pack.c" would have cleanly
applied before the migration away from the "repo_*()" wrapper macros
in the preceding commits.
The rest aren't new, as we'd previously implicitly refer to
"the_repository", but it's now more obvious that we were doing the
wrong thing all along, and should have used the parameter instead.
The change to change "get_index_format_default(the_repository)" in
"read-cache.c" to use the "r" variable instead should arguably have
been part of [1], or in the subsequent cleanup in [2]. Let's do it
here, as can be seen from the initial code in [3] it's not important
that we use "the_repository" there, but would prefer to always use the
current repository.
This change excludes the "the_repository" use in "upload-pack.c"'s
upload_pack_advertise(), as the in-flight [4] makes that change.
1. ee1f0c242ef (read-cache: add index.skipHash config option,
2023-01-06)
2. 6269f8eaad0 (treewide: always have a valid "index_state.repo"
member, 2023-01-17)
3. 7211b9e7534 (repo-settings: consolidate some config settings,
2019-08-13)
4. <Y/hbUsGPVNAxTdmS@coredump.intra.peff.net>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Apply the part of "the_repository.pending.cocci" pertaining to
"refs.h".
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Apply the part of "the_repository.pending.cocci" pertaining to
"cache.h".
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we introduced replace_each_worktree_head_symref() in 70999e9cec
(branch -m: update all per-worktree HEADs, 2016-03-27), we implemented a
best effort approach.
If we are asked to rename a branch that is simultaneously checked out in
multiple worktrees, we try to update all of those worktrees. If we fail
updating any of them, we die() as a signal that something has gone
wrong. However, at this point, the branch ref has already been renamed
and also updated the HEADs of the successfully updated worktrees.
Despite returning an error, we do not try to rollback those changes.
Let's add a test to notice if we change this behavior in the future.
In next commits we will change replace_each_worktree_head_symref() to
work more closely with its only caller, copy_or_rename_branch(). Let's
move the former closer to its caller, to facilitate those changes.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Dozens of files made use of gettext functions, without explicitly
including gettext.h. This made it more difficult to find which files
could remove a dependence on cache.h. Make C files explicitly include
gettext.h if they are using it.
However, while compat/fsmonitor/fsm-ipc-darwin.c should also gain an
include of gettext.h, it was left out to avoid conflicting with an
in-flight topic.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A few subcommands have been taught to stop users from working on a
branch that is being used in another worktree linked to the same
repository.
* rj/avoid-switching-to-already-used-branch:
switch: reject if the branch is already checked out elsewhere (test)
rebase: refuse to switch to a branch already checked out elsewhere (test)
branch: fix die_if_checked_out() when ignore_current_worktree
worktree: introduce is_shared_symref()
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In 8d9fdd7 (worktree.c: check whether branch is rebased in another
worktree, 2016-04-22) die_if_checked_out() learned a new option
ignore_current_worktree, to modify the operation from "die() if the
branch is checked out in any worktree" to "die() if the branch is
checked out in any worktree other than the current one".
Unfortunately we implemented it by checking the flag is_current in the
worktree that find_shared_symref() returns.
When the same branch is checked out in several worktrees simultaneously,
find_shared_symref() will return the first matching worktree in the list
composed by get_worktrees(). If one of the worktrees with the checked
out branch is the current worktree, find_shared_symref() may or may not
return it, depending on the order in the list.
Instead of find_shared_symref(), let's do the search using use the
recently introduced API is_shared_symref(), and consider
ignore_current_worktree when necessary.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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'git branch --recurse-submodules start from-here' fails if any submodule
present in 'from-here' is not yet cloned (under
submodule.propagateBranches=true). We then give this advice:
"You may try updating the submodules using 'git checkout from-here && git submodule update --init'"
If 'submodule.recurse' is set, 'git checkout from-here' will also fail since
it will try to recursively checkout the submodules.
Improve the advice by adding '--no-recurse-submodules' to the checkout
command.
Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Reviewed-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The branch_checked_out() helper helps commands like 'git branch' and
'git fetch' from overwriting refs that are currently checked out in
other worktrees.
A future update to 'git rebase' will introduce a new '--update-refs'
option which will update the local refs that point to commits that are
being rebased. To avoid collisions as the rebase completes, we want to
make the future data store for these refs to be considered by
branch_checked_out().
The data store is a plaintext file inside the 'rebase-merge' directory
for that worktree. The file lists refnames followed by two OIDs, each on
separate lines. The OIDs will be used to store the original values of
the refs and the to-be-written values as the rebase progresses, but can
be ignored at the moment.
Create a new sequencer_get_update_refs_state() method that parses this
file and populates a struct string_list with the ref-OID pairs. We can
then use this list to add to the current_checked_out_branches strmap
used by branch_checked_out().
To properly navigate to the rebase directory for a given worktree,
extract the static strbuf_worktree_gitdir() method to a public API
method.
We can test that this works without having Git write this file by
artificially creating one in our test script, at least until 'git rebase
--update-refs' is implemented and we can use it directly.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* ds/branch-checked-out:
branch: drop unused worktrees variable
fetch: stop passing around unused worktrees variable
branch: fix branch_checked_out() leaks
branch: use branch_checked_out() when deleting refs
fetch: use new branch_checked_out() and add tests
branch: check for bisects and rebases
branch: add branch_checked_out() helper
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The branch_checked_out() method populates a strmap linking a refname to
a worktree that has that branch checked out. While unlikely, it is
possible that a bug or filesystem manipulation could create a scenario
where the same ref is checked out in multiple places. Further, there are
some states in an interactive rebase where HEAD and REBASE_HEAD point to
the same ref, leading to multiple insertions into the strmap. In either
case, the strmap_put() method returns the old value which is leaked.
Update branch_checked_out() to consume that pointer and free it.
Add a test in t2407 that checks this erroneous case. The test "checks
itself" by first confirming that the filesystem manipulations it makes
trigger the branch_checked_out() logic, and then sets up similar
manipulations to make it look like there are multiple worktrees pointing
to the same ref.
While TEST_PASSES_SANITIZE_LEAK would be helpful to demonstrate the
leakage and prevent it in the future, t2407 uses helpers such as 'git
clone' that cause the test to fail under that mode.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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