checkout: fix double-free of checkout_data's mkdir_map
We currently call `git_strmap_free` on `checkout_data.mkdir_map` in the
`checkout_data_clear` function. The only thing protecting us from a
double-free is that the `git_strmap_free` function is in fact not a
function, but a macro that also sets the map to NULL.
Remove the second call to `git_strmap_free` and explicitly set the map
member to NULL.
submodule: catch when submodule is not staged on update
When calling `git_submodule_update` on a submodule, we have to retrieve
the ID of the submodule entry in the index. If the function is called on
a submodule which is only partly initialized, the submodule entry may
not be added to the index yet. This leads to an assert when trying to
look up the blob later on.
Fix the issue by checking if the index actually holds the submodule's
ID and erroring out if it does not.
Edward Thomson [Thu, 9 Mar 2017 12:26:23 +0000 (12:26 +0000)]
git_futils_readbuffer: don't compute sha-1
Don't compute the sha-1 in `git_futils_readbuffer_updated` unless the
checksum was requested. This means that `git_futils_readbuffer` will
not calculate the checksum unnecessarily.
David Turner [Fri, 3 Mar 2017 18:27:47 +0000 (13:27 -0500)]
rebase: ignore untracked files in submodules
An untracked file in a submodule should not prevent a rebase from
starting. Even if the submodule's SHA is changed, and that file would
conflict with a new tracked file, it's still OK to start the rebase
and discover the conflict later.
Signed-off-by: David Turner <dturner@twosigma.com>
cmake: only enable supported compiler warning flags
We currently unconditionally enable the "-Wall" and "-Wextra" flags.
Some platforms rely on compilers which do not support these flags,
though. One of these platforms is Haiku, which does not support
"-Wextra" due to being stuck on GCC version 2.
Fix builds on such platforms by adding these flags only if supported by
the compiler.
This test ensures that it's possible to create a symbolic ref that
has arbitrary data as its target. It also ensures it's possible
to obtain the target of that symbolic reference from the git_reference
object.
Jason Haslam [Wed, 22 Feb 2017 16:29:00 +0000 (09:29 -0700)]
pack: fix looping over cache entries
Fixes a regression from #4092. This is a crash on 32-bit and I assume that
it doesn't do the right thing on 64-bit either. MSVC emits a warning for this,
but of course, it's easy to get lost among all of the similar 'possible loss
of data' warnings.
Edward Thomson [Wed, 22 Feb 2017 10:34:19 +0000 (10:34 +0000)]
Provide error on gcc < 4.1 when THREADSAFE
Provide a descriptive error message when compiling THREADSAFE on gcc
versions < 4.1. We require the atomic primitives (eg
`__sync_synchronize`) that were introduced in that version.
(Note, clang setes `__GNUC__` but appears to set its version > 4.1.)
Remove useless indirection from `git_attr_cache__init` to
`git_attr_cache__do_init`. The difference is that the
`git_attr_cache__init` macro first checks if the cache is already
initialized and, if so, not call `git_attr_cache__do_init`. But
actually, `git_attr_cache__do_init` already does the same thing and
returns immediately if the cache is already initialized.
attrcache: replace existing file entry with `git__swap`
When doing an upsert of a file, we used to use `git__compare_and_swap`,
comparing the entry's file which is to be replaced with itself. This can
be more easily formulated by using `git__swap`, which unconditionally
replaces the value.
Edward Thomson [Fri, 17 Feb 2017 12:13:35 +0000 (12:13 +0000)]
tests: provide better pass/failure error messages
Provide more detailed messages when conditions pass or fail
unexpectedly. In particular, this provides the error messages when a
test fails with a different error code than was expected.
Edward Thomson [Fri, 17 Feb 2017 12:10:19 +0000 (12:10 +0000)]
p_snprintf: no need for arguments to a format
`snprintf` requires a _format_ but does not require _arguments_ to the
format. eg: `snprintf(buf, 42, "hi")` is perfectly legal. Expand the
macro to match.
Without this, `p_sprintf(buf, 42, "hi")` errors with:
The upstream git.git project currently identifies all references inside
of `refs/bisect/` as well as `HEAD` as per-worktree references. This is
already incorrect and is currently being fixed by an in-flight topic
[1]. The new behavior will be to match all pseudo-references outside of
the `refs/` hierarchy as well as `refs/bisect/`.
Our current behavior is to mark a selection of pseudo-references as
per-worktree, only. This matches more pseudo-references than current
git, but forgets about `refs/bisect/`. Adjust behavior to match the
in-flight topic, that is classify the following references as
per-worktree:
- everything outside of `refs/`
- everything inside of `refs/bisect/`
When extracting a commit's signature, we first free the object and only
afterwards put its signature contents into the result buffer. This works
in most cases - the free'd object will normally be cached anyway, so we
only end up decrementing its reference count without actually freeing
its contents. But in some more exotic setups, where caching is disabled,
this can definitly be a problem, as we might be the only instance
currently holding a reference to this object.
Fix this issue by first extracting the contents and freeing the object
afterwards only.
The functions `git_commit_header_field` and
`git_commit_extract_signature` both receive buffers used to hand back
the results to the user. While these functions called `git_buf_sanitize`
on these buffers, this is not the right thing to do, as it will simply
initialize or zero-terminate passed buffers. As we want to overwrite
contents, we instead have to call `git_buf_clear` to completely reset
them.
buffer: clarify how `git_buf_sanitize` handles non-NULL input
When `git_buf_sanitize` gets called, it converts a buffer with NULL
content to be correctly initialized. This is done by pointing it to
`git_buf__initbuf`. While the method's documentation states this
clearly, it may also lead to the conclusion that it will do the same to
buffers which do _not_ have NULL contents.
Clarify behavior when passing a buffer with non-NULL contents, where
`git_buf_sanitize` will ensure that the contents are `\0`-terminated.
worktree: compute workdir for worktrees opened via their gitdir
When opening a worktree via the gitdir of its parent repository
we fail to correctly set up the worktree's working directory. The
problem here is two-fold: we first fail to see that the gitdir
actually is a gitdir of a working tree and then subsequently
fail to determine the working tree location from the gitdir.
The first problem of not noticing a gitdir belongs to a worktree
can be solved by checking for the existence of a `gitdir` file in
the gitdir. This file points back to the gitlink file located in
the working tree's working directory. As this file only exists
for worktrees, it should be sufficient indication of the gitdir
belonging to a worktree.
The second problem, that is determining the location of the
worktree's working directory, can then be solved by reading the
`gitdir` file in the working directory's gitdir. When we now
resolve relative paths and strip the final `.git` component, we
have the actual worktree's working directory location.
repository: rename `path_repository` and `path_gitlink`
The `path_repository` variable is actually confusing to think
about, as it is not always clear what the repository actually is.
It may either be the path to the folder containing worktree and
.git directory, the path to .git itself, a worktree or something
entirely different. Actually, the intent of the variable is to
hold the path to the gitdir, which is either the .git directory
or the bare repository.
Rename the variable to `gitdir` to avoid confusion. While at it,
also rename `path_gitlink` to `gitlink` to improve consistency.
repository: restrict checking out checked out branches
If a branch is already checked out in a working tree we are not
allowed to check out that branch in another repository. Introduce
this restriction when setting a repository's HEAD.
Implement a new function that is able to determine if a branch is
checked out in any repository connected to the current
repository. In particular, this is required to check if for a
given repository and branch, there exists any working tree
connected to that repository that is referencing this branch.
Implement `git_repository_head_for_worktree` and
`git_repository_head_detached_for_worktree` for directly accessing a
worktree's HEAD without opening it as a `git_repository` first.
Implement the `git_worktree_prune` function. This function can be
used to delete working trees from a repository. According to the
flags passed to it, it can either delete the working tree's
gitdir only or both gitdir and the working directory.
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