The filter registry as implemented was too primitive to actually
work once multiple filters were coming into play. This expands
the implementation of the registry to handle multiple prioritized
filters correctly.
Additionally, this adds an "attributes" field to a filter that
makes it really really easy to implement filters that are based
on one or more attribute values. The lookup and even simple value
checking can all happen automatically without custom filter code.
Lastly, with the registry improvements, this fills out the filter
lifecycle callbacks, with initialize and shutdown callbacks that
will be called before the filter is first used and after it is
last invoked. This allows for system-wide initialization and
cleanup by the filter.
This creates include/sys/filter.h with a basic definition of a
git_filter and then converts the internal code to use it. There
are related internal objects (git_filter_list) that we will want
to publish at some point, but this is a first step.
This begins the process of exposing git_filter objects to the
public API. This includes:
* new public type and API for `git_buffer` through which an
allocated buffer can be passed to the user
* new API `git_blob_filtered_content`
* make the git_filter type and GIT_FILTER_TO_... constants public
Unfortunately git-core uses the term "unborn branch" and "orphan
branch" interchangeably. However, "orphan" is only really there for
the checkout command, which has the `--orphan` option so it doesn't
actually create the branch.
Branches never have parents, so the distinction of a branch with no
parents is odd to begin with. Crucially, the error messages deal with
unborn branches, so let's use that.
As the include depth increases, the chance of a realloc
increases. This means that whenever we run git_array_alloc() or call
config_parse(), we need to remember what our reader's index is so we
can look it up again.
We need to refresh the variables from the included files if they are
changed, so loop over all included files and re-parse the files if any
of them has changed.
Now that #1785 is merged, git_odb_stream_finalize_write() calculates the object id before invoking the odb backend.
This commit gives a chance to the backend to check if it already knows this object.
The GIT_MODE_TYPE macro was looking at all bits above the
permissions, but it should really just look at the top bits so
that it will give the right results for a setgid or setuid entry.
Since we're now using these macros in the tests, this was causing
a test failure on platforms that don't support setgid.
This adds some more macros for some standard operations on file
modes, particularly related to permissions, and then updates a
number of places around the code base to use the new macros.
In order to support config includes, we must differentiate between the
backend's main file and the file we are currently parsing.
This lays the groundwork for includes, keeping the current behaviours.
Previously, `git_object_read()`, `git_object_read_prefix()` and
`git_object_exists()` were implementing an auto refresh logic. When the
expected object couldn't be found in any backend, a call to
`git_odb_refresh()` was triggered and the lookup was once again performed
against all backends.
This commit removes this auto-refresh logic from the odb layer and pushes
it down into the pack-backend (as it's the only one currently exposing
a `refresh()` endpoint).
