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.
The function `diff_parsed_alloc` allocates and initializes a
`git_diff_parsed` structure. This structure also contains diff options.
While we initialize its flags, we fail to do a real initialization of
its values. This bites us when we want to actually use the generated
diff as we do not se the option's version field, which is required to
operate correctly.
Fix the issue by executing `git_diff_init_options` on the embedded
struct.
In a diff, the shortest possible hunk with a modification (that is, no
deletion) results from a file with only one line with a single character
which is removed. Thus the following hunk
@@ -1 +1 @@
-a
+
is the shortest valid hunk modifying a line. The function parsing the
hunk body though assumes that there must always be at least 4 bytes
present to make up a valid hunk, which is obviously wrong in this case.
The absolute minimum number of bytes required for a modification is
actually 2 bytes, that is the "+" and the following newline. Note: if
there is no trailing newline, the assumption will not be offended as the
diff will have a line "\ No trailing newline" at its end.
This patch fixes the issue by lowering the amount of bytes required.
Now that the `git_diff_foreach` function does not depend on internals of
the `git_patch_generated` structure anymore, we can easily move it to
the actual diff code.
The current logic of `git_diff_foreach` makes the assumption that all
diffs passed in are actually derived from generated diffs. With these
assumptions we try to derive the actual diff by inspecting either the
working directory files or blobs of a repository. This obviously cannot
work for diffs parsed from a file, where we do not necessarily have a
repository at hand.
Since the introduced split of parsed and generated patches, there are
multiple functions which help us to handle patches generically, being
indifferent from where they stem from. Use these functions and remove
the old logic specific to generated patches. This allows re-using the
same code for invoking the callbacks on the deltas.
Under the existing logic, we try to load patch contents differently,
depending on whether the patch files stem from the working directory or
not. But actually, the executed code paths are completely equal to each
other -- so we were always the code despite the condition.
Remove the condition altogether and conflate both code paths.
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.
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>
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.
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.
Remove the indirection.
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.
`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:
```
error: expected expression
p_snprintf(msg, 42, "hi");
^
src/unix/posix.h:53:34: note: expanded from macro 'p_snprintf'
^
/usr/include/secure/_stdio.h:57:73: note: expanded from macro 'snprintf'
__builtin___snprintf_chk (str, len, 0, __darwin_obsz(str),
__VA_ARGS__)
```
