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2017-06-23commit_packed_refs(): report errors rather than dyingLibravatar Michael Haggerty1-1/+1
Report errors via a `struct strbuf *err` rather than by calling `die()`. To enable this goal, change `write_packed_entry()` to report errors via a return value and `errno` rather than dying. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23packed_ref_store: make class into a subclass of `ref_store`Libravatar Michael Haggerty1-17/+6
Add the infrastructure to make `packed_ref_store` implement `ref_store`, at least formally (few of the methods are actually implemented yet). Change the functions in its interface to take `ref_store *` arguments. Change `files_ref_store` to store a pointer to `ref_store *` and to call functions via the virtual `ref_store` interface where possible. This also means that a few `packed_ref_store` functions can become static. This is a work in progress. Some more `ref_store` methods will soon be implemented (e.g., those having to do with reference transactions). But some of them will never be implemented (e.g., those having to do with symrefs or reflogs). Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23packed-backend: new module for handling packed referencesLibravatar Michael Haggerty1-0/+33
Now that the interface between `files_ref_store` and `packed_ref_store` is relatively narrow, move the latter into a new module, "refs/packed-backend.h" and "refs/packed-backend.c". It still doesn't quite implement the `ref_store` interface, but it will soon. This commit moves code around and adjusts its visibility, but doesn't change anything. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>