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This adds correct support for an equivalent to --ignore-submodules
in diff, where an actual ignore value can be passed to diff to
override the per submodule settings in the configuration.
This required tweaking the constants for ignore values so that
zero would not be used and could represent an unset option to the
diff. This was an opportunity to move the submodule values into
include/git2/types.h and to rename the poorly named DEFAULT values
for ignore and update constants to RESET instead.
Now the GIT_DIFF_IGNORE_SUBMODULES flag is exactly the same as
setting the ignore_submodules option to GIT_SUBMODULE_IGNORE_ALL
(which is actually a minor change from the old behavior in that
submodules will now be treated as UNMODIFIED deltas instead of
being left out totally - if you set GIT_DIFF_INCLUDE_UNMODIFIED).
This includes tests for the various new settings.
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This fixes the way that submodule status is checked to bypass just
about all of the caching in the submodule object. Based on the
ignore value, it will try to do the minimum work necessary to find
the current status of the submodule - but it will actually go to
disk to get all of the current values.
This also removes the custom refcounting stuff in favor of the
common git_refcount style. Right now, it is still for internal
purposes only, but it should make it easier to add true submodule
refcounting in the future with a public git_submodule_free call
that will allow bindings not to worry about the submodule object
getting freed from underneath them.
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This is probably not the final form of this change, but this is
a preliminary version of checking a timestamp to see if the cached
working directory HEAD OID matches the current. Right now, this
uses the timestamp on the index and is, like most of our timestamp
checking, subject to having only second accuracy.
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This is a big redesign of the git_submodule_status API and the
implementation of the redesigned API. It also fixes a number of
bugs that I found in other parts of the submodule API while
writing the tests for the status part.
This also fixes a couple of bugs in the iterators that had not
been noticed before - one with iterating when there is a gitlink
(i.e. separate-work-dir) and one where I was treating anything
even vaguely submodule-like as a submodule, more aggressively
than core git does.
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This replaces the old submodule API with a new extended API that
supports most of the things that can be done with `git submodule`.
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