collect_pack_filenames()
When repacking, the function `collect_pack_filenames()` is responsible for collecting the set of existing packs in the repository, and partitioning them into "kept" (if the pack has a ".keep" file or was given via `--keep-pack`) and "nonkept" (otherwise) lists. This function comes from the original C port of git-repack.sh from back ina1bbc6c017(repack: rewrite the shell script in C, 2013-09-15), where it first appears as `get_non_kept_pack_filenames()`. At the time, the implementation was a fairly direct translation from the relevant portion of git-repack.sh, which looped over the results of find "$PACKDIR" -type f -name '*.pack' either ignoring the pack as kept, or adding it to the list of existing packs. So the choice to directly translate this function in terms of `readdir()` ina1bbc6c017made sense. At the time, it was possible to refine the C version in terms of packed_git structs, but was never done. However, manually enumerating a repository's packs via `readdir()` is confusing and error-prone. It leads to frustrating inconsistencies between which packs Git considers to be part of a repository (i.e., could be found in the list of packs from `get_all_packs()`), and which packs `collect_pack_filenames()` considers to meet the same criteria. This bit us in73320e49ad(builtin/repack.c: only collect fully-formed packs, 2023-06-07), and again in the previous commit. Prevent these issues from biting us in the future by implementing the `collect_pack_filenames()` function by looping over an array of pointers to `packed_git` structs, ensuring that we use the same criteria to determine the set of available packs. One gotcha here is that we have to ignore non-local packs, since the original version of `collect_pack_filenames()` only looks at the local pack directory to collect existing packs. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git - fast, scalable, distributed revision control system
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- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks