Expose a way to retrieve, along with the target git_object, the reference
pointed at by some revparse expression (`@{<-n>}` or
`<branchname>@{upstream}` syntax).
In theory, if there was a problem reading the REUC data, the
read_reuc() routine could have left uninitialized and invalid
data in the git_index vector. This moves the line that inserts a
new entry into the vector down to the bottom of the routine so we
know all the content is already valid. Also, per @linquize, this
uses calloc to ensure no uninitialized data.
This adds an example implementation that emulates git cat-file.
It is a convenient and relatively simple example of getting data
out of a repository.
Implementing this also revealed that there are a number of APIs
that are still not using const pointers to objects that really
ought to be. The main cause of this is that `git_vector_bsearch`
may need to call `git_vector_sort` before doing the search, so a
const pointer to the vector is not allowed. However, for tree
objects, with a little care, we can ensure that the vector of
tree entries is always sorted and allow lookups to take a const
pointer. Also, the missing const in commit objects just looks
like an oversight.
Since I added the GIT_IDXENTRY_STAGE macro to extract the stage
from a git_index_entry, we probably don't need an internal inline
function to do the same thing.
Under some strange circumstances, diffs can end up listing files
that we can't actually open successfully. Instead of aborting
the git_diff_find_similar, this makes it so that those files just
won't be considered as valid rename/copy targets instead.
It is possible for there to be a submodule in a repository with
no .gitmodules file (for example, if the user forgot to commit
the .gitmodules file). In this case, core Git will just create
an empty directory as a placeholder for the submodule but
otherwise ignore it. We were generating an error and stopping
the checkout. This makes our behavior match that of core git.
Unlike blob updates, symlink updates cannot be done "in place"
writing over an old symlink. This means that in checkout when we
realize that we can safely update a symlink, we still need to
remove the old one before writing the new.
When the last item in a diff was an untracked directory that only
contained ignored items, the loop to scan the contents would run
off the end of the iterator and dereference a NULL pointer. This
includes a test that reproduces the problem and a fix.
There was a problem found in the Rugged test suite where the
refdb_fs_backend__next function could exit too early in some
very specific hashing patterns for packed refs. This ports
the Rugged test to libgit2 and then fixes the bug.
Nobody should ever be using anything other than ALL at this level, so
remove the option altogether.
As part of this, git_reference_foreach_glob is now implemented in the
frontend using an iterator. Backends will later regain the ability of
doing the glob filtering in the backend.
If you use rename detection, the renamed and copied files would
not show any text diffs because the function that decides if
data should be loaded didn't know which sides of the diff to
load for those cases.
This adds a test that looks at the patch generated for diff
entries that are COPIED or RENAMED.
The git_status_file API was doing a hack to deal with files that
are inside ignored directories. The status scan was not reporting
any file in this case, so git_status_file would attempt a final
"stat()" call, and return IGNORED if the file actually existed.
On case-insensitive filesystems where core.ignorecase is set
incorrectly, this magic check can "succeed" and report a file
as ignored when it should actually return ENOTFOUND.
Now that we have the GIT_STATUS_OPT_RECURSE_IGNORED_DIRS, we can
use that flag to make sure that git_status_file() will look into
ignored directories and eliminate the hack completely, so we give
the correct error.
This clarifies the docs for git_repository_message and also adds
to the tests to explicitly check NUL termination of data when the
output buffer is smaller than the message size. There is a minor
behavior change so that a non-NULL output buffer will always be
NUL terminated (at length zero) if an error occurs.
