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a8b1ba86d4
Replace the custom function with string_list_clear_func() which is a more common pattern for clearing a string_list. To be able to do this, rework hook_clear() into hook_free(), so it can be passed to string_list_clear_func(). A slight complication is the need to keep a copy of the internal cb data free() pointer, however I think it's worth it since the API becomes cleaner, e.g. no more calls with NULL function args like hook_list_clear(hooks, NULL). In other words, the callers don't need to keep track of hook internal state to determine when cleanup is necessary or not (pass NULL) because each `struct hook` now owns its data_free callback. Suggested-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>