This new version of the references code is significantly faster and
hopefully easier to read.
External API stays the same. A new method `git_reference_reload()` has
been added to force updating a memory reference from disk. In-memory
references are no longer updated automagically -- this was killing us.
If a reference is deleted externally and the user doesn't reload the
memory object, nothing critical happens: any functions using that
reference should fail gracefully (e.g. deletion, renaming, and so on).
All generated references from the API are read only and must be free'd
by the user. There is no reference counting and no traces of generated
references are kept in the library.
There is no longer an internal representation for references. There is
only one reference struct `git_reference`, and symbolic/oid targets are
stored inside an union.
Packfile references are stored using an optimized struct with flex array
for reference names. This should significantly reduce the memory cost of
loading the packfile from disk.
Currently libgit2 shares pointers to its internal reference cache with
the user. This leads to several problems like invalidation of reference
pointers when reordering the cache or manipulation of the cache from
user side.
Give each user its own git_reference instead of leaking the internal
representation (struct reference).
Add the following new API functions:
* git_reference_free
* git_reference_is_packed
Signed-off-by: schu <schu-github@schulog.org>
To further match how Git behaves, this change makes most of the
directories libgit2 creates in a git repo have a file mode of
0777. Specifically:
- Intermediate directories created with git_futils_mkpath2file() have
0777 permissions. This affects odb_loose, reflog, and refs.
- The top level folder for bare repos is created with 0777
permissions.
- The top level folder for non-bare repos is created with 0755
permissions.
- /objects/info/, /objects/pack/, /refs/heads/, and /refs/tags/ are
created with 0777 permissions.
Additionally, the following changes have been made:
- fileops functions that create intermediate directories have grown a
new dirmode parameter. The only exception to this is filebuf's
lock_file(), which unconditionally creates intermediate directories
with 0777 permissions when GIT_FILEBUF_FORCE is set.
- The test runner now sets the umask to 0 before running any
tests. This ensurses all file mode checks are consistent across
systems.
- t09-tree.c now does a directory permissions check. I've avoided
adding this check to other tests that might reuse existing
directories from the prefabricated test repos. Because they're
checked into the repo, they have 0755 permissions.
- Other assorted directories created by tests have 0777 permissions.
This ensures commit->message is always non-NULL, even if the commit
message is empty or consists of only a newline.
One such commit can be found in the wild in the jQuery repository:
25b424134f
git_signature_new() and git_signature_now() currently don't return error
codes. Change the API to return error codes and not pointers to let the
user handle errors properly.
Signed-off-by: schu <schu-github@schulog.org>
So far libgit2 didn't support reference logs (reflog). Add a new
git_reflog_* API for basic reading and writing of reflogs:
* git_reflog_read
* git_reflog_write
* git_reflog_free
Signed-off-by: schu <schu-github@schulog.org>
So far libgit2 didn't handle the following scenarios:
* Rename of reference m -> m/m
* Rename of reference n/n -> n
Fixed.
Since we don't write reflogs, we have to delete any old reflog for the
renamed reference. Otherwise git.git will possibly fail when it finds
invalid logs.
Reported-by: nulltoken <emeric.fermas@gmail.com>
Signed-off-by: schu <schu-github@schulog.org>
the old name succeeds, e.g. refs/heads/foo -> refs/heads/foo/bar
Reported-by: nulltoken <emeric.fermas@gmail.com>
Signed-off-by: schu <schu-github@schulog.org>
Cleaned up the structure of the whole OS-abstraction layer.
fileops.c now contains a set of utility methods for file management used
by the library. These are abstractions on top of the original POSIX
calls.
There's a new file called `posix.c` that contains
emulations/reimplementations of all the POSIX calls the library uses.
These are prefixed with `p_`. There's a specific posix file for each
platform (win32 and unix).
All the path-related methods have been moved from `utils.c` to `path.c`
and have their own prefix.
A bunch of redundant methods have been removed from the external API.
- All the reference/tag creation methods with `_f` are gone. The force
flag is now passed as an argument to the normal create methods.
- All the different commit creation methods are gone; commit creation
now always requires a `git_commit` pointer for parents and a `git_tree`
pointer for tree, to ensure that corrupted commits cannot be generated.
- All the different tag creation methods are gone; tag creation now
always requires a `git_object` pointer to ensure that tags are not
created to inexisting objects.
If we don't create any leaks in the tests, we can use them to search
for leaks in the implementation.
Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
The git test repository was holding a wrongly named tag reference ("very-simple") pointing at a tag named "e90810b".
This mistake (mine :-/ ) originates back to https://github.com/libgit2/libgit2/commit/9282e92
Whole credit goes to @tclem for having spotted this.
The methods previously known as
git_repository_lookup
git_repository_newobject
git_repository_lookup_ref
are now part of their respective namespaces:
git_object_lookup
git_object_new
git_reference_lookup
This makes the API more consistent with the new references API.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
Tests are now declared with detailed descriptions and a short test name:
BEGIN_TEST(the_test0, "this is an example test that does something")
...
END_TEST
Modules are declared through a simple macro interface:
BEGIN_MODULE(mod_name)
ADD_TEST(the_test0);
...
END_MODULE
Error messages when tests fail have been greatly improved.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
