90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
#ifndef LIST_OBJECTS_FILTER_H
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#define LIST_OBJECTS_FILTER_H
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struct list_objects_filter_options;
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struct object;
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struct oidset;
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struct repository;
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/*
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* During list-object traversal we allow certain objects to be
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* filtered (omitted) from the result. The active filter uses
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* these result values to guide list-objects.
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*
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* _ZERO : Do nothing with the object at this time. It may
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* be revisited if it appears in another place in
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* the tree or in another commit during the overall
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* traversal.
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*
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* _MARK_SEEN : Mark this object as "SEEN" in the object flags.
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* This will prevent it from being revisited during
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* the remainder of the traversal. This DOES NOT
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* imply that it will be included in the results.
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*
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* _DO_SHOW : Show this object in the results (call show() on it).
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* In general, objects should only be shown once, but
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* this result DOES NOT imply that we mark it SEEN.
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*
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* _SKIP_TREE : Used in LOFS_BEGIN_TREE situation - indicates that
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* the tree's children should not be iterated over. This
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* is used as an optimization when all children will
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* definitely be ignored.
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*
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* Most of the time, you want the combination (_MARK_SEEN | _DO_SHOW)
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* but they can be used independently, such as when sparse-checkout
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* pattern matching is being applied.
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*
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* A _MARK_SEEN without _DO_SHOW can be called a hard-omit -- the
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* object is not shown and will never be reconsidered (unless a
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* previous iteration has already shown it).
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*
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* A _DO_SHOW without _MARK_SEEN can be used, for example, to
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* include a directory, but then revisit it to selectively include
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* or omit objects within it.
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*
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* A _ZERO can be called a provisional-omit -- the object is NOT shown,
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* but *may* be revisited (if the object appears again in the traversal).
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* Therefore, it will be omitted from the results *unless* a later
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* iteration causes it to be shown.
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*/
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enum list_objects_filter_result {
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LOFR_ZERO = 0,
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LOFR_MARK_SEEN = 1<<0,
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LOFR_DO_SHOW = 1<<1,
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LOFR_SKIP_TREE = 1<<2,
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};
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enum list_objects_filter_situation {
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LOFS_BEGIN_TREE,
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LOFS_END_TREE,
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LOFS_BLOB
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};
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typedef enum list_objects_filter_result (*filter_object_fn)(
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struct repository *r,
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enum list_objects_filter_situation filter_situation,
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struct object *obj,
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const char *pathname,
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const char *filename,
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void *filter_data);
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typedef void (*filter_free_fn)(void *filter_data);
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/*
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* Constructor for the set of defined list-objects filters.
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* Returns a generic "void *filter_data".
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*
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* The returned "filter_fn" will be used by traverse_commit_list()
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* to filter the results.
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*
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* The returned "filter_free_fn" is a destructor for the
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* filter_data.
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*/
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void *list_objects_filter__init(
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struct oidset *omitted,
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struct list_objects_filter_options *filter_options,
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filter_object_fn *filter_fn,
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filter_free_fn *filter_free_fn);
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#endif /* LIST_OBJECTS_FILTER_H */
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