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ccb7f822d5
When writing a MIDX, 'git repack' takes a snapshot of the repository's references and writes the result out to a file, which it then passes to 'git multi-pack-index write' via the '--refs-snapshot'. This is done in order to make bitmap selections with respect to what we are packing, thus avoiding a race where an incoming reference update causes us to try and write a bitmap for a commit not present in the MIDX. Extract this functionality out into a new repack-midx.c compilation unit, and expose the necessary functions via the repack.h API. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
#include "git-compat-util.h"
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#include "repack.h"
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#include "hash.h"
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#include "hex.h"
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#include "odb.h"
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#include "oidset.h"
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#include "pack-bitmap.h"
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#include "refs.h"
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#include "tempfile.h"
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struct midx_snapshot_ref_data {
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struct repository *repo;
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struct tempfile *f;
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struct oidset seen;
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int preferred;
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};
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static int midx_snapshot_ref_one(const char *refname UNUSED,
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const char *referent UNUSED,
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const struct object_id *oid,
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int flag UNUSED, void *_data)
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{
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struct midx_snapshot_ref_data *data = _data;
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struct object_id peeled;
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if (!peel_iterated_oid(data->repo, oid, &peeled))
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oid = &peeled;
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if (oidset_insert(&data->seen, oid))
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return 0; /* already seen */
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if (odb_read_object_info(data->repo->objects, oid, NULL) != OBJ_COMMIT)
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return 0;
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fprintf(data->f->fp, "%s%s\n", data->preferred ? "+" : "",
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oid_to_hex(oid));
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return 0;
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}
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void midx_snapshot_refs(struct repository *repo, struct tempfile *f)
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{
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struct midx_snapshot_ref_data data;
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const struct string_list *preferred = bitmap_preferred_tips(repo);
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data.repo = repo;
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data.f = f;
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data.preferred = 0;
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oidset_init(&data.seen, 0);
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if (!fdopen_tempfile(f, "w"))
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die(_("could not open tempfile %s for writing"),
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get_tempfile_path(f));
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if (preferred) {
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struct string_list_item *item;
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data.preferred = 1;
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for_each_string_list_item(item, preferred)
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refs_for_each_ref_in(get_main_ref_store(repo),
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item->string,
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midx_snapshot_ref_one, &data);
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data.preferred = 0;
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}
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refs_for_each_ref(get_main_ref_store(repo),
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midx_snapshot_ref_one, &data);
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if (close_tempfile_gently(f)) {
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int save_errno = errno;
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delete_tempfile(&f);
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errno = save_errno;
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die_errno(_("could not close refs snapshot tempfile"));
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}
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oidset_clear(&data.seen);
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}
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