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authorJunio C Hamano <gitster@pobox.com>2020-02-14 20:54:19 (GMT)
committerJunio C Hamano <gitster@pobox.com>2020-02-14 20:54:19 (GMT)
commita14aebeac330e6d58f9628a02521ea780daf0a5b (patch)
tree930def7948667c23b7a252fec9a9b26a3a834828
parentdaef1b300b07c3d17d47c3bf01ebde28b62ff3fe (diff)
parentd2ea031046e8b10c2fd8120996db2dd542b30764 (diff)
downloadgit-a14aebeac330e6d58f9628a02521ea780daf0a5b.zip
git-a14aebeac330e6d58f9628a02521ea780daf0a5b.tar.gz
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Merge branch 'jk/packfile-reuse-cleanup'
The way "git pack-objects" reuses objects stored in existing pack to generate its result has been improved. * jk/packfile-reuse-cleanup: pack-bitmap: don't rely on bitmap_git->reuse_objects pack-objects: add checks for duplicate objects pack-objects: improve partial packfile reuse builtin/pack-objects: introduce obj_is_packed() pack-objects: introduce pack.allowPackReuse csum-file: introduce hashfile_total() pack-bitmap: simplify bitmap_has_oid_in_uninteresting() pack-bitmap: uninteresting oid can be outside bitmapped packfile pack-bitmap: introduce bitmap_walk_contains() ewah/bitmap: introduce bitmap_word_alloc() packfile: expose get_delta_base() builtin/pack-objects: report reused packfile objects
-rw-r--r--Documentation/config/pack.txt7
-rw-r--r--builtin/pack-objects.c243
-rw-r--r--csum-file.h9
-rw-r--r--ewah/bitmap.c13
-rw-r--r--ewah/ewok.h1
-rw-r--r--pack-bitmap.c192
-rw-r--r--pack-bitmap.h6
-rw-r--r--packfile.c10
-rw-r--r--packfile.h3
9 files changed, 362 insertions, 122 deletions
diff --git a/Documentation/config/pack.txt b/Documentation/config/pack.txt
index 1d66f0c..0dac580 100644
--- a/Documentation/config/pack.txt
+++ b/Documentation/config/pack.txt
@@ -27,6 +27,13 @@ Note that changing the compression level will not automatically recompress
all existing objects. You can force recompression by passing the -F option
to linkgit:git-repack[1].
+pack.allowPackReuse::
+ When true, and when reachability bitmaps are enabled,
+ pack-objects will try to send parts of the bitmapped packfile
+ verbatim. This can reduce memory and CPU usage to serve fetches,
+ but might result in sending a slightly larger pack. Defaults to
+ true.
+
pack.island::
An extended regular expression configuring a set of delta
islands. See "DELTA ISLANDS" in linkgit:git-pack-objects[1]
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 393c20a..b199820 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -92,10 +92,11 @@ static struct progress *progress_state;
static struct packed_git *reuse_packfile;
static uint32_t reuse_packfile_objects;
-static off_t reuse_packfile_offset;
+static struct bitmap *reuse_packfile_bitmap;
static int use_bitmap_index_default = 1;
static int use_bitmap_index = -1;
+static int allow_pack_reuse = 1;
static enum {
WRITE_BITMAP_FALSE = 0,
WRITE_BITMAP_QUIET,
@@ -784,57 +785,185 @@ static struct object_entry **compute_write_order(void)
return wo;
}
-static off_t write_reused_pack(struct hashfile *f)
+
+/*
+ * A reused set of objects. All objects in a chunk have the same
+ * relative position in the original packfile and the generated
+ * packfile.
+ */
+
+static struct reused_chunk {
+ /* The offset of the first object of this chunk in the original
+ * packfile. */
+ off_t original;
+ /* The offset of the first object of this chunk in the generated
+ * packfile minus "original". */
+ off_t difference;
+} *reused_chunks;
+static int reused_chunks_nr;
+static int reused_chunks_alloc;
+
+static void record_reused_object(off_t where, off_t offset)
+{
+ if (reused_chunks_nr && reused_chunks[reused_chunks_nr-1].difference == offset)
+ return;
+
+ ALLOC_GROW(reused_chunks, reused_chunks_nr + 1,
+ reused_chunks_alloc);
+ reused_chunks[reused_chunks_nr].original = where;
+ reused_chunks[reused_chunks_nr].difference = offset;
+ reused_chunks_nr++;
+}
+
+/*
+ * Binary search to find the chunk that "where" is in. Note
+ * that we're not looking for an exact match, just the first
+ * chunk that contains it (which implicitly ends at the start
+ * of the next chunk.
+ */
+static off_t find_reused_offset(off_t where)
+{
+ int lo = 0, hi = reused_chunks_nr;
+ while (lo < hi) {
+ int mi = lo + ((hi - lo) / 2);
+ if (where == reused_chunks[mi].original)
+ return reused_chunks[mi].difference;
+ if (where < reused_chunks[mi].original)
+ hi = mi;
+ else
+ lo = mi + 1;
+ }
+
+ /*
+ * The first chunk starts at zero, so we can't have gone below
+ * there.
+ */
+ assert(lo);
+ return reused_chunks[lo-1].difference;
+}
+
+static void write_reused_pack_one(size_t pos, struct hashfile *out,
+ struct pack_window **w_curs)
{
- unsigned char buffer[8192];
- off_t to_write, total;
- int fd;
+ off_t offset, next, cur;
+ enum object_type type;
+ unsigned long size;
- if (!is_pack_valid(reuse_packfile))
- die(_("packfile is invalid: %s"), reuse_packfile->pack_name);
+ offset = reuse_packfile->revindex[pos].offset;
+ next = reuse_packfile->revindex[pos + 1].offset;
- fd = git_open(reuse_packfile->pack_name);
- if (fd < 0)
- die_errno(_("unable to open packfile for reuse: %s"),
- reuse_packfile->pack_name);
+ record_reused_object(offset, offset - hashfile_total(out));
- if (lseek(fd, sizeof(struct pack_header), SEEK_SET) == -1)
- die_errno(_("unable to seek in reused packfile"));
+ cur = offset;
+ type = unpack_object_header(reuse_packfile, w_curs, &cur, &size);
+ assert(type >= 0);
- if (reuse_packfile_offset < 0)
- reuse_packfile_offset = reuse_packfile->pack_size - the_hash_algo->rawsz;
+ if (type == OBJ_OFS_DELTA) {
+ off_t base_offset;
+ off_t fixup;
+
+ unsigned char header[MAX_PACK_OBJECT_HEADER];
+ unsigned len;
+
+ base_offset = get_delta_base(reuse_packfile, w_curs, &cur, type, offset);
+ assert(base_offset != 0);
+
+ /* Convert to REF_DELTA if we must... */
+ if (!allow_ofs_delta) {
+ int base_pos = find_revindex_position(reuse_packfile, base_offset);
+ const unsigned char *base_sha1 =
+ nth_packed_object_sha1(reuse_packfile,
+ reuse_packfile->revindex[base_pos].nr);
+
+ len = encode_in_pack_object_header(header, sizeof(header),
+ OBJ_REF_DELTA, size);
+ hashwrite(out, header, len);
+ hashwrite(out, base_sha1, 20);
+ copy_pack_data(out, reuse_packfile, w_curs, cur, next - cur);
+ return;
+ }
- total = to_write = reuse_packfile_offset - sizeof(struct pack_header);
+ /* Otherwise see if we need to rewrite the offset... */
+ fixup = find_reused_offset(offset) -
+ find_reused_offset(base_offset);
+ if (fixup) {
+ unsigned char ofs_header[10];
+ unsigned i, ofs_len;
+ off_t ofs = offset - base_offset - fixup;
- while (to_write) {
- int read_pack = xread(fd, buffer, sizeof(buffer));
+ len = encode_in_pack_object_header(header, sizeof(header),
+ OBJ_OFS_DELTA, size);
- if (read_pack <= 0)
- die_errno(_("unable to read from reused packfile"));
+ i = sizeof(ofs_header) - 1;
+ ofs_header[i] = ofs & 127;
+ while (ofs >>= 7)
+ ofs_header[--i] = 128 | (--ofs & 127);
- if (read_pack > to_write)
- read_pack = to_write;
+ ofs_len = sizeof(ofs_header) - i;
- hashwrite(f, buffer, read_pack);
- to_write -= read_pack;
+ hashwrite(out, header, len);
+ hashwrite(out, ofs_header + sizeof(ofs_header) - ofs_len, ofs_len);
+ copy_pack_data(out, reuse_packfile, w_curs, cur, next - cur);
+ return;
+ }
+
+ /* ...otherwise we have no fixup, and can write it verbatim */
+ }
+
+ copy_pack_data(out, reuse_packfile, w_curs, offset, next - offset);
+}
+
+static size_t write_reused_pack_verbatim(struct hashfile *out,
+ struct pack_window **w_curs)
+{
+ size_t pos = 0;
+
+ while (pos < reuse_packfile_bitmap->word_alloc &&
+ reuse_packfile_bitmap->words[pos] == (eword_t)~0)
+ pos++;
+
+ if (pos) {
+ off_t to_write;
+
+ written = (pos * BITS_IN_EWORD);
+ to_write = reuse_packfile->revindex[written].offset
+ - sizeof(struct pack_header);
+
+ /* We're recording one chunk, not one object. */
+ record_reused_object(sizeof(struct pack_header), 0);
+ hashflush(out);
+ copy_pack_data(out, reuse_packfile, w_curs,
+ sizeof(struct pack_header), to_write);
- /*
- * We don't know the actual number of objects written,
- * only how many bytes written, how many bytes total, and
- * how many objects total. So we can fake it by pretending all
- * objects we are writing are the same size. This gives us a
- * smooth progress meter, and at the end it matches the true
- * answer.
- */
- written = reuse_packfile_objects *
- (((double)(total - to_write)) / total);
display_progress(progress_state, written);
}
+ return pos;
+}
+
+static void write_reused_pack(struct hashfile *f)
+{
+ size_t i = 0;
+ uint32_t offset;
+ struct pack_window *w_curs = NULL;
+
+ if (allow_ofs_delta)
+ i = write_reused_pack_verbatim(f, &w_curs);
+
+ for (; i < reuse_packfile_bitmap->word_alloc; ++i) {
+ eword_t word = reuse_packfile_bitmap->words[i];
+ size_t pos = (i * BITS_IN_EWORD);
- close(fd);
- written = reuse_packfile_objects;
- display_progress(progress_state, written);
- return reuse_packfile_offset - sizeof(struct pack_header);
+ for (offset = 0; offset < BITS_IN_EWORD; ++offset) {
+ if ((word >> offset) == 0)
+ break;
+
+ offset += ewah_bit_ctz64(word >> offset);
+ write_reused_pack_one(pos + offset, f, &w_curs);
+ display_progress(progress_state, ++written);
+ }
+ }
+
+ unuse_pack(&w_curs);
}
static const char no_split_warning[] = N_(
@@ -867,11 +996,9 @@ static void write_pack_file(void)
offset = write_pack_header(f, nr_remaining);
if (reuse_packfile) {
- off_t packfile_size;
assert(pack_to_stdout);
-
- packfile_size = write_reused_pack(f);
- offset += packfile_size;
+ write_reused_pack(f);
+ offset = hashfile_total(f);
}
nr_written = 0;
@@ -1000,6 +1127,10 @@ static int have_duplicate_entry(const struct object_id *oid,
{
struct object_entry *entry;
+ if (reuse_packfile_bitmap &&
+ bitmap_walk_contains(bitmap_git, reuse_packfile_bitmap, oid))
+ return 1;
+
entry = packlist_find(&to_pack, oid);
if (!entry)
return 0;
@@ -2552,6 +2683,13 @@ static void ll_find_deltas(struct object_entry **list, unsigned list_size,
free(p);
}
+static int obj_is_packed(const struct object_id *oid)
+{
+ return packlist_find(&to_pack, oid) ||
+ (reuse_packfile_bitmap &&
+ bitmap_walk_contains(bitmap_git, reuse_packfile_bitmap, oid));
+}
+
static void add_tag_chain(const struct object_id *oid)
{
struct tag *tag;
@@ -2563,7 +2701,7 @@ static void add_tag_chain(const struct object_id *oid)
* it was included via bitmaps, we would not have parsed it
* previously).
*/
- if (packlist_find(&to_pack, oid))
+ if (obj_is_packed(oid))
return;
tag = lookup_tag(the_repository, oid);
@@ -2587,7 +2725,7 @@ static int add_ref_tag(const char *path, const struct object_id *oid, int flag,
if (starts_with(path, "refs/tags/") && /* is a tag? */
!peel_ref(path, &peeled) && /* peelable? */
- packlist_find(&to_pack, &peeled)) /* object packed? */
+ obj_is_packed(&peeled)) /* object packed? */
add_tag_chain(oid);
return 0;
}
@@ -2655,6 +2793,7 @@ static void prepare_pack(int window, int depth)
if (nr_deltas && n > 1) {
unsigned nr_done = 0;
+
if (progress)
progress_state = start_progress(_("Compressing objects"),
nr_deltas);
@@ -2699,6 +2838,10 @@ static int git_pack_config(const char *k, const char *v, void *cb)
use_bitmap_index_default = git_config_bool(k, v);
return 0;
}
+ if (!strcmp(k, "pack.allowpackreuse")) {
+ allow_pack_reuse = git_config_bool(k, v);
+ return 0;
+ }
if (!strcmp(k, "pack.threads")) {
delta_search_threads = git_config_int(k, v);
if (delta_search_threads < 0)
@@ -3030,8 +3173,8 @@ static void loosen_unused_packed_objects(void)
*/
static int pack_options_allow_reuse(void)
{
- return pack_to_stdout &&
- allow_ofs_delta &&
+ return allow_pack_reuse &&
+ pack_to_stdout &&
!ignore_packed_keep_on_disk &&
!ignore_packed_keep_in_core &&
(!local || !have_non_local_packs) &&
@@ -3048,7 +3191,7 @@ static int get_object_list_from_bitmap(struct rev_info *revs)
bitmap_git,
&reuse_packfile,
&reuse_packfile_objects,
- &reuse_packfile_offset)) {
+ &reuse_packfile_bitmap)) {
assert(reuse_packfile_objects);
nr_result += reuse_packfile_objects;
display_progress(progress_state, nr_result);
@@ -3509,7 +3652,9 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
if (progress)
fprintf_ln(stderr,
_("Total %"PRIu32" (delta %"PRIu32"),"
- " reused %"PRIu32" (delta %"PRIu32")"),
- written, written_delta, reused, reused_delta);
+ " reused %"PRIu32" (delta %"PRIu32"),"
+ " pack-reused %"PRIu32),
+ written, written_delta, reused, reused_delta,
+ reuse_packfile_objects);
return 0;
}
diff --git a/csum-file.h b/csum-file.h
index a98b1ee..f9cbd31 100644
--- a/csum-file.h
+++ b/csum-file.h
@@ -42,6 +42,15 @@ void hashflush(struct hashfile *f);
void crc32_begin(struct hashfile *);
uint32_t crc32_end(struct hashfile *);
+/*
+ * Returns the total number of bytes fed to the hashfile so far (including ones
+ * that have not been written out to the descriptor yet).
+ */
+static inline off_t hashfile_total(struct hashfile *f)
+{
+ return f->total + f->offset;
+}
+
static inline void hashwrite_u8(struct hashfile *f, uint8_t data)
{
hashwrite(f, &data, sizeof(data));
diff --git a/ewah/bitmap.c b/ewah/bitmap.c
index 52f1178..b5fed96 100644
--- a/ewah/bitmap.c
+++ b/ewah/bitmap.c
@@ -22,21 +22,26 @@
#define EWAH_MASK(x) ((eword_t)1 << (x % BITS_IN_EWORD))
#define EWAH_BLOCK(x) (x / BITS_IN_EWORD)
-struct bitmap *bitmap_new(void)
+struct bitmap *bitmap_word_alloc(size_t word_alloc)
{
struct bitmap *bitmap = xmalloc(sizeof(struct bitmap));
- bitmap->words = xcalloc(32, sizeof(eword_t));
- bitmap->word_alloc = 32;
+ bitmap->words = xcalloc(word_alloc, sizeof(eword_t));
+ bitmap->word_alloc = word_alloc;
return bitmap;
}
+struct bitmap *bitmap_new(void)
+{
+ return bitmap_word_alloc(32);
+}
+
void bitmap_set(struct bitmap *self, size_t pos)
{
size_t block = EWAH_BLOCK(pos);
if (block >= self->word_alloc) {
size_t old_size = self->word_alloc;
- self->word_alloc = block * 2;
+ self->word_alloc = block ? block * 2 : 1;
REALLOC_ARRAY(self->words, self->word_alloc);
memset(self->words + old_size, 0x0,
(self->word_alloc - old_size) * sizeof(eword_t));
diff --git a/ewah/ewok.h b/ewah/ewok.h
index 84b2a29..1b98b57 100644
--- a/ewah/ewok.h
+++ b/ewah/ewok.h
@@ -172,6 +172,7 @@ struct bitmap {
};
struct bitmap *bitmap_new(void);
+struct bitmap *bitmap_word_alloc(size_t word_alloc);
void bitmap_set(struct bitmap *self, size_t pos);
int bitmap_get(struct bitmap *self, size_t pos);
void bitmap_reset(struct bitmap *self);
diff --git a/pack-bitmap.c b/pack-bitmap.c
index e07c798..5a8689c 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -326,6 +326,13 @@ failed:
munmap(bitmap_git->map, bitmap_git->map_size);
bitmap_git->map = NULL;
bitmap_git->map_size = 0;
+
+ kh_destroy_oid_map(bitmap_git->bitmaps);
+ bitmap_git->bitmaps = NULL;
+
+ kh_destroy_oid_pos(bitmap_git->ext_index.positions);
+ bitmap_git->ext_index.positions = NULL;
+
return -1;
}
@@ -622,7 +629,7 @@ static void show_objects_for_type(
enum object_type object_type,
show_reachable_fn show_reach)
{
- size_t pos = 0, i = 0;
+ size_t i = 0;
uint32_t offset;
struct ewah_iterator it;
@@ -630,13 +637,15 @@ static void show_objects_for_type(
struct bitmap *objects = bitmap_git->result;
- if (bitmap_git->reuse_objects == bitmap_git->pack->num_objects)
- return;
-
ewah_iterator_init(&it, type_filter);
- while (i < objects->word_alloc && ewah_iterator_next(&filter, &it)) {
+ for (i = 0; i < objects->word_alloc &&
+ ewah_iterator_next(&filter, &it); i++) {
eword_t word = objects->words[i] & filter;
+ size_t pos = (i * BITS_IN_EWORD);
+
+ if (!word)
+ continue;
for (offset = 0; offset < BITS_IN_EWORD; ++offset) {
struct object_id oid;
@@ -648,9 +657,6 @@ static void show_objects_for_type(
offset += ewah_bit_ctz64(word >> offset);
- if (pos + offset < bitmap_git->reuse_objects)
- continue;
-
entry = &bitmap_git->pack->revindex[pos + offset];
nth_packed_object_oid(&oid, bitmap_git->pack, entry->nr);
@@ -659,9 +665,6 @@ static void show_objects_for_type(
show_reach(&oid, object_type, 0, hash, bitmap_git->pack, entry->offset);
}
-
- pos += BITS_IN_EWORD;
- i++;
}
}
@@ -768,66 +771,139 @@ cleanup:
return NULL;
}
-int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
- struct packed_git **packfile,
- uint32_t *entries,
- off_t *up_to)
+static void try_partial_reuse(struct bitmap_index *bitmap_git,
+ size_t pos,
+ struct bitmap *reuse,
+ struct pack_window **w_curs)
{
+ struct revindex_entry *revidx;
+ off_t offset;
+ enum object_type type;
+ unsigned long size;
+
+ if (pos >= bitmap_git->pack->num_objects)
+ return; /* not actually in the pack */
+
+ revidx = &bitmap_git->pack->revindex[pos];
+ offset = revidx->offset;
+ type = unpack_object_header(bitmap_git->pack, w_curs, &offset, &size);
+ if (type < 0)
+ return; /* broken packfile, punt */
+
+ if (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA) {
+ off_t base_offset;
+ int base_pos;
+
+ /*
+ * Find the position of the base object so we can look it up
+ * in our bitmaps. If we can't come up with an offset, or if
+ * that offset is not in the revidx, the pack is corrupt.
+ * There's nothing we can do, so just punt on this object,
+ * and the normal slow path will complain about it in
+ * more detail.
+ */
+ base_offset = get_delta_base(bitmap_git->pack, w_curs,
+ &offset, type, revidx->offset);
+ if (!base_offset)
+ return;
+ base_pos = find_revindex_position(bitmap_git->pack, base_offset);
+ if (base_pos < 0)
+ return;
+
+ /*
+ * We assume delta dependencies always point backwards. This
+ * lets us do a single pass, and is basically always true
+ * due to the way OFS_DELTAs work. You would not typically
+ * find REF_DELTA in a bitmapped pack, since we only bitmap
+ * packs we write fresh, and OFS_DELTA is the default). But
+ * let's double check to make sure the pack wasn't written with
+ * odd parameters.
+ */
+ if (base_pos >= pos)
+ return;
+
+ /*
+ * And finally, if we're not sending the base as part of our
+ * reuse chunk, then don't send this object either. The base
+ * would come after us, along with other objects not
+ * necessarily in the pack, which means we'd need to convert
+ * to REF_DELTA on the fly. Better to just let the normal
+ * object_entry code path handle it.
+ */
+ if (!bitmap_get(reuse, base_pos))
+ return;
+ }
+
/*
- * Reuse the packfile content if we need more than
- * 90% of its objects
+ * If we got here, then the object is OK to reuse. Mark it.
*/
- static const double REUSE_PERCENT = 0.9;
+ bitmap_set(reuse, pos);
+}
+int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
+ struct packed_git **packfile_out,
+ uint32_t *entries,
+ struct bitmap **reuse_out)
+{
struct bitmap *result = bitmap_git->result;
- uint32_t reuse_threshold;
- uint32_t i, reuse_objects = 0;
+ struct bitmap *reuse;
+ struct pack_window *w_curs = NULL;
+ size_t i = 0;
+ uint32_t offset;
assert(result);
- for (i = 0; i < result->word_alloc; ++i) {
- if (result->words[i] != (eword_t)~0) {
- reuse_objects += ewah_bit_ctz64(~result->words[i]);
- break;
- }
+ while (i < result->word_alloc && result->words[i] == (eword_t)~0)
+ i++;
- reuse_objects += BITS_IN_EWORD;
- }
+ /* Don't mark objects not in the packfile */
+ if (i > bitmap_git->pack->num_objects / BITS_IN_EWORD)
+ i = bitmap_git->pack->num_objects / BITS_IN_EWORD;
-#ifdef GIT_BITMAP_DEBUG
- {
- const unsigned char *sha1;
- struct revindex_entry *entry;
+ reuse = bitmap_word_alloc(i);
+ memset(reuse->words, 0xFF, i * sizeof(eword_t));
- entry = &bitmap_git->reverse_index->revindex[reuse_objects];
- sha1 = nth_packed_object_sha1(bitmap_git->pack, entry->nr);
+ for (; i < result->word_alloc; ++i) {
+ eword_t word = result->words[i];
+ size_t pos = (i * BITS_IN_EWORD);
+
+ for (offset = 0; offset < BITS_IN_EWORD; ++offset) {
+ if ((word >> offset) == 0)
+ break;
- fprintf(stderr, "Failed to reuse at %d (%016llx)\n",
- reuse_objects, result->words[i]);
- fprintf(stderr, " %s\n", hash_to_hex(sha1));
+ offset += ewah_bit_ctz64(word >> offset);
+ try_partial_reuse(bitmap_git, pos + offset, reuse, &w_curs);
+ }
}
-#endif
- if (!reuse_objects)
- return -1;
+ unuse_pack(&w_curs);
- if (reuse_objects >= bitmap_git->pack->num_objects) {
- bitmap_git->reuse_objects = *entries = bitmap_git->pack->num_objects;
- *up_to = -1; /* reuse the full pack */
- *packfile = bitmap_git->pack;
- return 0;
+ *entries = bitmap_popcount(reuse);
+ if (!*entries) {
+ bitmap_free(reuse);
+ return -1;
}
- reuse_threshold = bitmap_popcount(bitmap_git->result) * REUSE_PERCENT;
+ /*
+ * Drop any reused objects from the result, since they will not
+ * need to be handled separately.
+ */
+ bitmap_and_not(result, reuse);
+ *packfile_out = bitmap_git->pack;
+ *reuse_out = reuse;
+ return 0;
+}
- if (reuse_objects < reuse_threshold)
- return -1;
+int bitmap_walk_contains(struct bitmap_index *bitmap_git,
+ struct bitmap *bitmap, const struct object_id *oid)
+{
+ int idx;
- bitmap_git->reuse_objects = *entries = reuse_objects;
- *up_to = bitmap_git->pack->revindex[reuse_objects].offset;
- *packfile = bitmap_git->pack;
+ if (!bitmap)
+ return 0;
- return 0;
+ idx = bitmap_position(bitmap_git, oid);
+ return idx >= 0 && bitmap_get(bitmap, idx);
}
void traverse_bitmap_commit_list(struct bitmap_index *bitmap_git,
@@ -1118,16 +1194,6 @@ void free_bitmap_index(struct bitmap_index *b)
int bitmap_has_oid_in_uninteresting(struct bitmap_index *bitmap_git,
const struct object_id *oid)
{
- int pos;
-
- if (!bitmap_git)
- return 0; /* no bitmap loaded */
- if (!bitmap_git->haves)
- return 0; /* walk had no "haves" */
-
- pos = bitmap_position_packfile(bitmap_git, oid);
- if (pos < 0)
- return 0;
-
- return bitmap_get(bitmap_git->haves, pos);
+ return bitmap_git &&
+ bitmap_walk_contains(bitmap_git, bitmap_git->haves, oid);
}
diff --git a/pack-bitmap.h b/pack-bitmap.h
index 466c5af..bcd03b8 100644
--- a/pack-bitmap.h
+++ b/pack-bitmap.h
@@ -3,6 +3,7 @@
#include "ewah/ewok.h"
#include "khash.h"
+#include "pack.h"
#include "pack-objects.h"
struct commit;
@@ -49,10 +50,13 @@ void test_bitmap_walk(struct rev_info *revs);
struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs);
int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
struct packed_git **packfile,
- uint32_t *entries, off_t *up_to);
+ uint32_t *entries,
+ struct bitmap **reuse_out);
int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
kh_oid_map_t *reused_bitmaps, int show_progress);
void free_bitmap_index(struct bitmap_index *);
+int bitmap_walk_contains(struct bitmap_index *,
+ struct bitmap *bitmap, const struct object_id *oid);
/*
* After a traversal has been performed by prepare_bitmap_walk(), this can be
diff --git a/packfile.c b/packfile.c
index 7e7c04e..514bc57 100644
--- a/packfile.c
+++ b/packfile.c
@@ -1162,11 +1162,11 @@ const struct packed_git *has_packed_and_bad(struct repository *r,
return NULL;
}
-static off_t get_delta_base(struct packed_git *p,
- struct pack_window **w_curs,
- off_t *curpos,
- enum object_type type,
- off_t delta_obj_offset)
+off_t get_delta_base(struct packed_git *p,
+ struct pack_window **w_curs,
+ off_t *curpos,
+ enum object_type type,
+ off_t delta_obj_offset)
{
unsigned char *base_info = use_pack(p, w_curs, *curpos, NULL);
off_t base_offset;
diff --git a/packfile.h b/packfile.h
index fc7904e..ec536a4 100644
--- a/packfile.h
+++ b/packfile.h
@@ -151,6 +151,9 @@ void *unpack_entry(struct repository *r, struct packed_git *, off_t, enum object
unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
+off_t get_delta_base(struct packed_git *p, struct pack_window **w_curs,
+ off_t *curpos, enum object_type type,
+ off_t delta_obj_offset);
void release_pack_memory(size_t);