3 #include "repository.h"
13 #include "pack-revindex.h"
14 #include "csum-file.h"
15 #include "tree-walk.h"
18 #include "list-objects.h"
19 #include "list-objects-filter.h"
20 #include "list-objects-filter-options.h"
21 #include "pack-objects.h"
24 #include "streaming.h"
25 #include "thread-utils.h"
26 #include "pack-bitmap.h"
27 #include "delta-islands.h"
28 #include "reachable.h"
29 #include "oid-array.h"
33 #include "object-store.h"
38 #include "promisor-remote.h"
40 #define IN_PACK(obj) oe_in_pack(&to_pack, obj)
41 #define SIZE(obj) oe_size(&to_pack, obj)
42 #define SET_SIZE(obj,size) oe_set_size(&to_pack, obj, size)
43 #define DELTA_SIZE(obj) oe_delta_size(&to_pack, obj)
44 #define DELTA(obj) oe_delta(&to_pack, obj)
45 #define DELTA_CHILD(obj) oe_delta_child(&to_pack, obj)
46 #define DELTA_SIBLING(obj) oe_delta_sibling(&to_pack, obj)
47 #define SET_DELTA(obj, val) oe_set_delta(&to_pack, obj, val)
48 #define SET_DELTA_EXT(obj, oid) oe_set_delta_ext(&to_pack, obj, oid)
49 #define SET_DELTA_SIZE(obj, val) oe_set_delta_size(&to_pack, obj, val)
50 #define SET_DELTA_CHILD(obj, val) oe_set_delta_child(&to_pack, obj, val)
51 #define SET_DELTA_SIBLING(obj, val) oe_set_delta_sibling(&to_pack, obj, val)
53 static const char *pack_usage
[] = {
54 N_("git pack-objects --stdout [<options>...] [< <ref-list> | < <object-list>]"),
55 N_("git pack-objects [<options>...] <base-name> [< <ref-list> | < <object-list>]"),
60 * Objects we are going to pack are collected in the `to_pack` structure.
61 * It contains an array (dynamically expanded) of the object data, and a map
62 * that can resolve SHA1s to their position in the array.
64 static struct packing_data to_pack
;
66 static struct pack_idx_entry
**written_list
;
67 static uint32_t nr_result
, nr_written
, nr_seen
;
68 static struct bitmap_index
*bitmap_git
;
69 static uint32_t write_layer
;
72 static int reuse_delta
= 1, reuse_object
= 1;
73 static int keep_unreachable
, unpack_unreachable
, include_tag
;
74 static timestamp_t unpack_unreachable_expiration
;
75 static int pack_loose_unreachable
;
77 static int have_non_local_packs
;
78 static int incremental
;
79 static int ignore_packed_keep_on_disk
;
80 static int ignore_packed_keep_in_core
;
81 static int allow_ofs_delta
;
82 static struct pack_idx_option pack_idx_opts
;
83 static const char *base_name
;
84 static int progress
= 1;
85 static int window
= 10;
86 static unsigned long pack_size_limit
;
87 static int depth
= 50;
88 static int delta_search_threads
;
89 static int pack_to_stdout
;
92 static int num_preferred_base
;
93 static struct progress
*progress_state
;
95 static struct packed_git
*reuse_packfile
;
96 static uint32_t reuse_packfile_objects
;
97 static struct bitmap
*reuse_packfile_bitmap
;
99 static int use_bitmap_index_default
= 1;
100 static int use_bitmap_index
= -1;
101 static int allow_pack_reuse
= 1;
103 WRITE_BITMAP_FALSE
= 0,
106 } write_bitmap_index
;
107 static uint16_t write_bitmap_options
= BITMAP_OPT_HASH_CACHE
;
109 static int exclude_promisor_objects
;
111 static int use_delta_islands
;
113 static unsigned long delta_cache_size
= 0;
114 static unsigned long max_delta_cache_size
= DEFAULT_DELTA_CACHE_SIZE
;
115 static unsigned long cache_max_small_delta_size
= 1000;
117 static unsigned long window_memory_limit
= 0;
119 static struct list_objects_filter_options filter_options
;
121 static struct string_list uri_protocols
= STRING_LIST_INIT_NODUP
;
123 enum missing_action
{
124 MA_ERROR
= 0, /* fail if any missing objects are encountered */
125 MA_ALLOW_ANY
, /* silently allow ALL missing objects */
126 MA_ALLOW_PROMISOR
, /* silently allow all missing PROMISOR objects */
128 static enum missing_action arg_missing_action
;
129 static show_object_fn fn_show_object
;
131 struct configured_exclusion
{
132 struct oidmap_entry e
;
136 static struct oidmap configured_exclusions
;
138 static struct oidset excluded_by_config
;
143 static uint32_t written
, written_delta
;
144 static uint32_t reused
, reused_delta
;
149 static struct commit
**indexed_commits
;
150 static unsigned int indexed_commits_nr
;
151 static unsigned int indexed_commits_alloc
;
153 static void index_commit_for_bitmap(struct commit
*commit
)
155 if (indexed_commits_nr
>= indexed_commits_alloc
) {
156 indexed_commits_alloc
= (indexed_commits_alloc
+ 32) * 2;
157 REALLOC_ARRAY(indexed_commits
, indexed_commits_alloc
);
160 indexed_commits
[indexed_commits_nr
++] = commit
;
163 static void *get_delta(struct object_entry
*entry
)
165 unsigned long size
, base_size
, delta_size
;
166 void *buf
, *base_buf
, *delta_buf
;
167 enum object_type type
;
169 buf
= read_object_file(&entry
->idx
.oid
, &type
, &size
);
171 die(_("unable to read %s"), oid_to_hex(&entry
->idx
.oid
));
172 base_buf
= read_object_file(&DELTA(entry
)->idx
.oid
, &type
,
175 die("unable to read %s",
176 oid_to_hex(&DELTA(entry
)->idx
.oid
));
177 delta_buf
= diff_delta(base_buf
, base_size
,
178 buf
, size
, &delta_size
, 0);
180 * We successfully computed this delta once but dropped it for
181 * memory reasons. Something is very wrong if this time we
182 * recompute and create a different delta.
184 if (!delta_buf
|| delta_size
!= DELTA_SIZE(entry
))
185 BUG("delta size changed");
191 static unsigned long do_compress(void **pptr
, unsigned long size
)
195 unsigned long maxsize
;
197 git_deflate_init(&stream
, pack_compression_level
);
198 maxsize
= git_deflate_bound(&stream
, size
);
201 out
= xmalloc(maxsize
);
205 stream
.avail_in
= size
;
206 stream
.next_out
= out
;
207 stream
.avail_out
= maxsize
;
208 while (git_deflate(&stream
, Z_FINISH
) == Z_OK
)
210 git_deflate_end(&stream
);
213 return stream
.total_out
;
216 static unsigned long write_large_blob_data(struct git_istream
*st
, struct hashfile
*f
,
217 const struct object_id
*oid
)
220 unsigned char ibuf
[1024 * 16];
221 unsigned char obuf
[1024 * 16];
222 unsigned long olen
= 0;
224 git_deflate_init(&stream
, pack_compression_level
);
229 readlen
= read_istream(st
, ibuf
, sizeof(ibuf
));
231 die(_("unable to read %s"), oid_to_hex(oid
));
233 stream
.next_in
= ibuf
;
234 stream
.avail_in
= readlen
;
235 while ((stream
.avail_in
|| readlen
== 0) &&
236 (zret
== Z_OK
|| zret
== Z_BUF_ERROR
)) {
237 stream
.next_out
= obuf
;
238 stream
.avail_out
= sizeof(obuf
);
239 zret
= git_deflate(&stream
, readlen
? 0 : Z_FINISH
);
240 hashwrite(f
, obuf
, stream
.next_out
- obuf
);
241 olen
+= stream
.next_out
- obuf
;
244 die(_("deflate error (%d)"), zret
);
246 if (zret
!= Z_STREAM_END
)
247 die(_("deflate error (%d)"), zret
);
251 git_deflate_end(&stream
);
256 * we are going to reuse the existing object data as is. make
257 * sure it is not corrupt.
259 static int check_pack_inflate(struct packed_git
*p
,
260 struct pack_window
**w_curs
,
263 unsigned long expect
)
266 unsigned char fakebuf
[4096], *in
;
269 memset(&stream
, 0, sizeof(stream
));
270 git_inflate_init(&stream
);
272 in
= use_pack(p
, w_curs
, offset
, &stream
.avail_in
);
274 stream
.next_out
= fakebuf
;
275 stream
.avail_out
= sizeof(fakebuf
);
276 st
= git_inflate(&stream
, Z_FINISH
);
277 offset
+= stream
.next_in
- in
;
278 } while (st
== Z_OK
|| st
== Z_BUF_ERROR
);
279 git_inflate_end(&stream
);
280 return (st
== Z_STREAM_END
&&
281 stream
.total_out
== expect
&&
282 stream
.total_in
== len
) ? 0 : -1;
285 static void copy_pack_data(struct hashfile
*f
,
286 struct packed_git
*p
,
287 struct pack_window
**w_curs
,
295 in
= use_pack(p
, w_curs
, offset
, &avail
);
297 avail
= (unsigned long)len
;
298 hashwrite(f
, in
, avail
);
304 /* Return 0 if we will bust the pack-size limit */
305 static unsigned long write_no_reuse_object(struct hashfile
*f
, struct object_entry
*entry
,
306 unsigned long limit
, int usable_delta
)
308 unsigned long size
, datalen
;
309 unsigned char header
[MAX_PACK_OBJECT_HEADER
],
310 dheader
[MAX_PACK_OBJECT_HEADER
];
312 enum object_type type
;
314 struct git_istream
*st
= NULL
;
315 const unsigned hashsz
= the_hash_algo
->rawsz
;
318 if (oe_type(entry
) == OBJ_BLOB
&&
319 oe_size_greater_than(&to_pack
, entry
, big_file_threshold
) &&
320 (st
= open_istream(the_repository
, &entry
->idx
.oid
, &type
,
321 &size
, NULL
)) != NULL
)
324 buf
= read_object_file(&entry
->idx
.oid
, &type
, &size
);
326 die(_("unable to read %s"),
327 oid_to_hex(&entry
->idx
.oid
));
330 * make sure no cached delta data remains from a
331 * previous attempt before a pack split occurred.
333 FREE_AND_NULL(entry
->delta_data
);
334 entry
->z_delta_size
= 0;
335 } else if (entry
->delta_data
) {
336 size
= DELTA_SIZE(entry
);
337 buf
= entry
->delta_data
;
338 entry
->delta_data
= NULL
;
339 type
= (allow_ofs_delta
&& DELTA(entry
)->idx
.offset
) ?
340 OBJ_OFS_DELTA
: OBJ_REF_DELTA
;
342 buf
= get_delta(entry
);
343 size
= DELTA_SIZE(entry
);
344 type
= (allow_ofs_delta
&& DELTA(entry
)->idx
.offset
) ?
345 OBJ_OFS_DELTA
: OBJ_REF_DELTA
;
348 if (st
) /* large blob case, just assume we don't compress well */
350 else if (entry
->z_delta_size
)
351 datalen
= entry
->z_delta_size
;
353 datalen
= do_compress(&buf
, size
);
356 * The object header is a byte of 'type' followed by zero or
357 * more bytes of length.
359 hdrlen
= encode_in_pack_object_header(header
, sizeof(header
),
362 if (type
== OBJ_OFS_DELTA
) {
364 * Deltas with relative base contain an additional
365 * encoding of the relative offset for the delta
366 * base from this object's position in the pack.
368 off_t ofs
= entry
->idx
.offset
- DELTA(entry
)->idx
.offset
;
369 unsigned pos
= sizeof(dheader
) - 1;
370 dheader
[pos
] = ofs
& 127;
372 dheader
[--pos
] = 128 | (--ofs
& 127);
373 if (limit
&& hdrlen
+ sizeof(dheader
) - pos
+ datalen
+ hashsz
>= limit
) {
379 hashwrite(f
, header
, hdrlen
);
380 hashwrite(f
, dheader
+ pos
, sizeof(dheader
) - pos
);
381 hdrlen
+= sizeof(dheader
) - pos
;
382 } else if (type
== OBJ_REF_DELTA
) {
384 * Deltas with a base reference contain
385 * additional bytes for the base object ID.
387 if (limit
&& hdrlen
+ hashsz
+ datalen
+ hashsz
>= limit
) {
393 hashwrite(f
, header
, hdrlen
);
394 hashwrite(f
, DELTA(entry
)->idx
.oid
.hash
, hashsz
);
397 if (limit
&& hdrlen
+ datalen
+ hashsz
>= limit
) {
403 hashwrite(f
, header
, hdrlen
);
406 datalen
= write_large_blob_data(st
, f
, &entry
->idx
.oid
);
409 hashwrite(f
, buf
, datalen
);
413 return hdrlen
+ datalen
;
416 /* Return 0 if we will bust the pack-size limit */
417 static off_t
write_reuse_object(struct hashfile
*f
, struct object_entry
*entry
,
418 unsigned long limit
, int usable_delta
)
420 struct packed_git
*p
= IN_PACK(entry
);
421 struct pack_window
*w_curs
= NULL
;
422 struct revindex_entry
*revidx
;
424 enum object_type type
= oe_type(entry
);
426 unsigned char header
[MAX_PACK_OBJECT_HEADER
],
427 dheader
[MAX_PACK_OBJECT_HEADER
];
429 const unsigned hashsz
= the_hash_algo
->rawsz
;
430 unsigned long entry_size
= SIZE(entry
);
433 type
= (allow_ofs_delta
&& DELTA(entry
)->idx
.offset
) ?
434 OBJ_OFS_DELTA
: OBJ_REF_DELTA
;
435 hdrlen
= encode_in_pack_object_header(header
, sizeof(header
),
438 offset
= entry
->in_pack_offset
;
439 revidx
= find_pack_revindex(p
, offset
);
440 datalen
= revidx
[1].offset
- offset
;
441 if (!pack_to_stdout
&& p
->index_version
> 1 &&
442 check_pack_crc(p
, &w_curs
, offset
, datalen
, revidx
->nr
)) {
443 error(_("bad packed object CRC for %s"),
444 oid_to_hex(&entry
->idx
.oid
));
446 return write_no_reuse_object(f
, entry
, limit
, usable_delta
);
449 offset
+= entry
->in_pack_header_size
;
450 datalen
-= entry
->in_pack_header_size
;
452 if (!pack_to_stdout
&& p
->index_version
== 1 &&
453 check_pack_inflate(p
, &w_curs
, offset
, datalen
, entry_size
)) {
454 error(_("corrupt packed object for %s"),
455 oid_to_hex(&entry
->idx
.oid
));
457 return write_no_reuse_object(f
, entry
, limit
, usable_delta
);
460 if (type
== OBJ_OFS_DELTA
) {
461 off_t ofs
= entry
->idx
.offset
- DELTA(entry
)->idx
.offset
;
462 unsigned pos
= sizeof(dheader
) - 1;
463 dheader
[pos
] = ofs
& 127;
465 dheader
[--pos
] = 128 | (--ofs
& 127);
466 if (limit
&& hdrlen
+ sizeof(dheader
) - pos
+ datalen
+ hashsz
>= limit
) {
470 hashwrite(f
, header
, hdrlen
);
471 hashwrite(f
, dheader
+ pos
, sizeof(dheader
) - pos
);
472 hdrlen
+= sizeof(dheader
) - pos
;
474 } else if (type
== OBJ_REF_DELTA
) {
475 if (limit
&& hdrlen
+ hashsz
+ datalen
+ hashsz
>= limit
) {
479 hashwrite(f
, header
, hdrlen
);
480 hashwrite(f
, DELTA(entry
)->idx
.oid
.hash
, hashsz
);
484 if (limit
&& hdrlen
+ datalen
+ hashsz
>= limit
) {
488 hashwrite(f
, header
, hdrlen
);
490 copy_pack_data(f
, p
, &w_curs
, offset
, datalen
);
493 return hdrlen
+ datalen
;
496 /* Return 0 if we will bust the pack-size limit */
497 static off_t
write_object(struct hashfile
*f
,
498 struct object_entry
*entry
,
503 int usable_delta
, to_reuse
;
508 /* apply size limit if limited packsize and not first object */
509 if (!pack_size_limit
|| !nr_written
)
511 else if (pack_size_limit
<= write_offset
)
513 * the earlier object did not fit the limit; avoid
514 * mistaking this with unlimited (i.e. limit = 0).
518 limit
= pack_size_limit
- write_offset
;
521 usable_delta
= 0; /* no delta */
522 else if (!pack_size_limit
)
523 usable_delta
= 1; /* unlimited packfile */
524 else if (DELTA(entry
)->idx
.offset
== (off_t
)-1)
525 usable_delta
= 0; /* base was written to another pack */
526 else if (DELTA(entry
)->idx
.offset
)
527 usable_delta
= 1; /* base already exists in this pack */
529 usable_delta
= 0; /* base could end up in another pack */
532 to_reuse
= 0; /* explicit */
533 else if (!IN_PACK(entry
))
534 to_reuse
= 0; /* can't reuse what we don't have */
535 else if (oe_type(entry
) == OBJ_REF_DELTA
||
536 oe_type(entry
) == OBJ_OFS_DELTA
)
537 /* check_object() decided it for us ... */
538 to_reuse
= usable_delta
;
539 /* ... but pack split may override that */
540 else if (oe_type(entry
) != entry
->in_pack_type
)
541 to_reuse
= 0; /* pack has delta which is unusable */
542 else if (DELTA(entry
))
543 to_reuse
= 0; /* we want to pack afresh */
545 to_reuse
= 1; /* we have it in-pack undeltified,
546 * and we do not need to deltify it.
550 len
= write_no_reuse_object(f
, entry
, limit
, usable_delta
);
552 len
= write_reuse_object(f
, entry
, limit
, usable_delta
);
560 entry
->idx
.crc32
= crc32_end(f
);
564 enum write_one_status
{
565 WRITE_ONE_SKIP
= -1, /* already written */
566 WRITE_ONE_BREAK
= 0, /* writing this will bust the limit; not written */
567 WRITE_ONE_WRITTEN
= 1, /* normal */
568 WRITE_ONE_RECURSIVE
= 2 /* already scheduled to be written */
571 static enum write_one_status
write_one(struct hashfile
*f
,
572 struct object_entry
*e
,
579 * we set offset to 1 (which is an impossible value) to mark
580 * the fact that this object is involved in "write its base
581 * first before writing a deltified object" recursion.
583 recursing
= (e
->idx
.offset
== 1);
585 warning(_("recursive delta detected for object %s"),
586 oid_to_hex(&e
->idx
.oid
));
587 return WRITE_ONE_RECURSIVE
;
588 } else if (e
->idx
.offset
|| e
->preferred_base
) {
589 /* offset is non zero if object is written already. */
590 return WRITE_ONE_SKIP
;
593 /* if we are deltified, write out base object first. */
595 e
->idx
.offset
= 1; /* now recurse */
596 switch (write_one(f
, DELTA(e
), offset
)) {
597 case WRITE_ONE_RECURSIVE
:
598 /* we cannot depend on this one */
603 case WRITE_ONE_BREAK
:
604 e
->idx
.offset
= recursing
;
605 return WRITE_ONE_BREAK
;
609 e
->idx
.offset
= *offset
;
610 size
= write_object(f
, e
, *offset
);
612 e
->idx
.offset
= recursing
;
613 return WRITE_ONE_BREAK
;
615 written_list
[nr_written
++] = &e
->idx
;
617 /* make sure off_t is sufficiently large not to wrap */
618 if (signed_add_overflows(*offset
, size
))
619 die(_("pack too large for current definition of off_t"));
621 return WRITE_ONE_WRITTEN
;
624 static int mark_tagged(const char *path
, const struct object_id
*oid
, int flag
,
627 struct object_id peeled
;
628 struct object_entry
*entry
= packlist_find(&to_pack
, oid
);
632 if (!peel_ref(path
, &peeled
)) {
633 entry
= packlist_find(&to_pack
, &peeled
);
640 static inline void add_to_write_order(struct object_entry
**wo
,
642 struct object_entry
*e
)
644 if (e
->filled
|| oe_layer(&to_pack
, e
) != write_layer
)
650 static void add_descendants_to_write_order(struct object_entry
**wo
,
652 struct object_entry
*e
)
654 int add_to_order
= 1;
657 struct object_entry
*s
;
658 /* add this node... */
659 add_to_write_order(wo
, endp
, e
);
660 /* all its siblings... */
661 for (s
= DELTA_SIBLING(e
); s
; s
= DELTA_SIBLING(s
)) {
662 add_to_write_order(wo
, endp
, s
);
665 /* drop down a level to add left subtree nodes if possible */
666 if (DELTA_CHILD(e
)) {
671 /* our sibling might have some children, it is next */
672 if (DELTA_SIBLING(e
)) {
673 e
= DELTA_SIBLING(e
);
676 /* go back to our parent node */
678 while (e
&& !DELTA_SIBLING(e
)) {
679 /* we're on the right side of a subtree, keep
680 * going up until we can go right again */
684 /* done- we hit our original root node */
687 /* pass it off to sibling at this level */
688 e
= DELTA_SIBLING(e
);
693 static void add_family_to_write_order(struct object_entry
**wo
,
695 struct object_entry
*e
)
697 struct object_entry
*root
;
699 for (root
= e
; DELTA(root
); root
= DELTA(root
))
701 add_descendants_to_write_order(wo
, endp
, root
);
704 static void compute_layer_order(struct object_entry
**wo
, unsigned int *wo_end
)
706 unsigned int i
, last_untagged
;
707 struct object_entry
*objects
= to_pack
.objects
;
709 for (i
= 0; i
< to_pack
.nr_objects
; i
++) {
710 if (objects
[i
].tagged
)
712 add_to_write_order(wo
, wo_end
, &objects
[i
]);
717 * Then fill all the tagged tips.
719 for (; i
< to_pack
.nr_objects
; i
++) {
720 if (objects
[i
].tagged
)
721 add_to_write_order(wo
, wo_end
, &objects
[i
]);
725 * And then all remaining commits and tags.
727 for (i
= last_untagged
; i
< to_pack
.nr_objects
; i
++) {
728 if (oe_type(&objects
[i
]) != OBJ_COMMIT
&&
729 oe_type(&objects
[i
]) != OBJ_TAG
)
731 add_to_write_order(wo
, wo_end
, &objects
[i
]);
735 * And then all the trees.
737 for (i
= last_untagged
; i
< to_pack
.nr_objects
; i
++) {
738 if (oe_type(&objects
[i
]) != OBJ_TREE
)
740 add_to_write_order(wo
, wo_end
, &objects
[i
]);
744 * Finally all the rest in really tight order
746 for (i
= last_untagged
; i
< to_pack
.nr_objects
; i
++) {
747 if (!objects
[i
].filled
&& oe_layer(&to_pack
, &objects
[i
]) == write_layer
)
748 add_family_to_write_order(wo
, wo_end
, &objects
[i
]);
752 static struct object_entry
**compute_write_order(void)
754 uint32_t max_layers
= 1;
755 unsigned int i
, wo_end
;
757 struct object_entry
**wo
;
758 struct object_entry
*objects
= to_pack
.objects
;
760 for (i
= 0; i
< to_pack
.nr_objects
; i
++) {
761 objects
[i
].tagged
= 0;
762 objects
[i
].filled
= 0;
763 SET_DELTA_CHILD(&objects
[i
], NULL
);
764 SET_DELTA_SIBLING(&objects
[i
], NULL
);
768 * Fully connect delta_child/delta_sibling network.
769 * Make sure delta_sibling is sorted in the original
772 for (i
= to_pack
.nr_objects
; i
> 0;) {
773 struct object_entry
*e
= &objects
[--i
];
776 /* Mark me as the first child */
777 e
->delta_sibling_idx
= DELTA(e
)->delta_child_idx
;
778 SET_DELTA_CHILD(DELTA(e
), e
);
782 * Mark objects that are at the tip of tags.
784 for_each_tag_ref(mark_tagged
, NULL
);
786 if (use_delta_islands
)
787 max_layers
= compute_pack_layers(&to_pack
);
789 ALLOC_ARRAY(wo
, to_pack
.nr_objects
);
792 for (; write_layer
< max_layers
; ++write_layer
)
793 compute_layer_order(wo
, &wo_end
);
795 if (wo_end
!= to_pack
.nr_objects
)
796 die(_("ordered %u objects, expected %"PRIu32
),
797 wo_end
, to_pack
.nr_objects
);
804 * A reused set of objects. All objects in a chunk have the same
805 * relative position in the original packfile and the generated
809 static struct reused_chunk
{
810 /* The offset of the first object of this chunk in the original
813 /* The offset of the first object of this chunk in the generated
814 * packfile minus "original". */
817 static int reused_chunks_nr
;
818 static int reused_chunks_alloc
;
820 static void record_reused_object(off_t where
, off_t offset
)
822 if (reused_chunks_nr
&& reused_chunks
[reused_chunks_nr
-1].difference
== offset
)
825 ALLOC_GROW(reused_chunks
, reused_chunks_nr
+ 1,
826 reused_chunks_alloc
);
827 reused_chunks
[reused_chunks_nr
].original
= where
;
828 reused_chunks
[reused_chunks_nr
].difference
= offset
;
833 * Binary search to find the chunk that "where" is in. Note
834 * that we're not looking for an exact match, just the first
835 * chunk that contains it (which implicitly ends at the start
838 static off_t
find_reused_offset(off_t where
)
840 int lo
= 0, hi
= reused_chunks_nr
;
842 int mi
= lo
+ ((hi
- lo
) / 2);
843 if (where
== reused_chunks
[mi
].original
)
844 return reused_chunks
[mi
].difference
;
845 if (where
< reused_chunks
[mi
].original
)
852 * The first chunk starts at zero, so we can't have gone below
856 return reused_chunks
[lo
-1].difference
;
859 static void write_reused_pack_one(size_t pos
, struct hashfile
*out
,
860 struct pack_window
**w_curs
)
862 off_t offset
, next
, cur
;
863 enum object_type type
;
866 offset
= reuse_packfile
->revindex
[pos
].offset
;
867 next
= reuse_packfile
->revindex
[pos
+ 1].offset
;
869 record_reused_object(offset
, offset
- hashfile_total(out
));
872 type
= unpack_object_header(reuse_packfile
, w_curs
, &cur
, &size
);
875 if (type
== OBJ_OFS_DELTA
) {
879 unsigned char header
[MAX_PACK_OBJECT_HEADER
];
882 base_offset
= get_delta_base(reuse_packfile
, w_curs
, &cur
, type
, offset
);
883 assert(base_offset
!= 0);
885 /* Convert to REF_DELTA if we must... */
886 if (!allow_ofs_delta
) {
887 int base_pos
= find_revindex_position(reuse_packfile
, base_offset
);
888 struct object_id base_oid
;
890 nth_packed_object_id(&base_oid
, reuse_packfile
,
891 reuse_packfile
->revindex
[base_pos
].nr
);
893 len
= encode_in_pack_object_header(header
, sizeof(header
),
894 OBJ_REF_DELTA
, size
);
895 hashwrite(out
, header
, len
);
896 hashwrite(out
, base_oid
.hash
, the_hash_algo
->rawsz
);
897 copy_pack_data(out
, reuse_packfile
, w_curs
, cur
, next
- cur
);
901 /* Otherwise see if we need to rewrite the offset... */
902 fixup
= find_reused_offset(offset
) -
903 find_reused_offset(base_offset
);
905 unsigned char ofs_header
[10];
907 off_t ofs
= offset
- base_offset
- fixup
;
909 len
= encode_in_pack_object_header(header
, sizeof(header
),
910 OBJ_OFS_DELTA
, size
);
912 i
= sizeof(ofs_header
) - 1;
913 ofs_header
[i
] = ofs
& 127;
915 ofs_header
[--i
] = 128 | (--ofs
& 127);
917 ofs_len
= sizeof(ofs_header
) - i
;
919 hashwrite(out
, header
, len
);
920 hashwrite(out
, ofs_header
+ sizeof(ofs_header
) - ofs_len
, ofs_len
);
921 copy_pack_data(out
, reuse_packfile
, w_curs
, cur
, next
- cur
);
925 /* ...otherwise we have no fixup, and can write it verbatim */
928 copy_pack_data(out
, reuse_packfile
, w_curs
, offset
, next
- offset
);
931 static size_t write_reused_pack_verbatim(struct hashfile
*out
,
932 struct pack_window
**w_curs
)
936 while (pos
< reuse_packfile_bitmap
->word_alloc
&&
937 reuse_packfile_bitmap
->words
[pos
] == (eword_t
)~0)
943 written
= (pos
* BITS_IN_EWORD
);
944 to_write
= reuse_packfile
->revindex
[written
].offset
945 - sizeof(struct pack_header
);
947 /* We're recording one chunk, not one object. */
948 record_reused_object(sizeof(struct pack_header
), 0);
950 copy_pack_data(out
, reuse_packfile
, w_curs
,
951 sizeof(struct pack_header
), to_write
);
953 display_progress(progress_state
, written
);
958 static void write_reused_pack(struct hashfile
*f
)
962 struct pack_window
*w_curs
= NULL
;
965 i
= write_reused_pack_verbatim(f
, &w_curs
);
967 for (; i
< reuse_packfile_bitmap
->word_alloc
; ++i
) {
968 eword_t word
= reuse_packfile_bitmap
->words
[i
];
969 size_t pos
= (i
* BITS_IN_EWORD
);
971 for (offset
= 0; offset
< BITS_IN_EWORD
; ++offset
) {
972 if ((word
>> offset
) == 0)
975 offset
+= ewah_bit_ctz64(word
>> offset
);
976 write_reused_pack_one(pos
+ offset
, f
, &w_curs
);
977 display_progress(progress_state
, ++written
);
984 static void write_excluded_by_configs(void)
986 struct oidset_iter iter
;
987 const struct object_id
*oid
;
989 oidset_iter_init(&excluded_by_config
, &iter
);
990 while ((oid
= oidset_iter_next(&iter
))) {
991 struct configured_exclusion
*ex
=
992 oidmap_get(&configured_exclusions
, oid
);
995 BUG("configured exclusion wasn't configured");
996 write_in_full(1, ex
->pack_hash_hex
, strlen(ex
->pack_hash_hex
));
997 write_in_full(1, " ", 1);
998 write_in_full(1, ex
->uri
, strlen(ex
->uri
));
999 write_in_full(1, "\n", 1);
1003 static const char no_split_warning
[] = N_(
1004 "disabling bitmap writing, packs are split due to pack.packSizeLimit"
1007 static void write_pack_file(void)
1012 uint32_t nr_remaining
= nr_result
;
1013 time_t last_mtime
= 0;
1014 struct object_entry
**write_order
;
1016 if (progress
> pack_to_stdout
)
1017 progress_state
= start_progress(_("Writing objects"), nr_result
);
1018 ALLOC_ARRAY(written_list
, to_pack
.nr_objects
);
1019 write_order
= compute_write_order();
1022 struct object_id oid
;
1023 char *pack_tmp_name
= NULL
;
1026 f
= hashfd_throughput(1, "<stdout>", progress_state
);
1028 f
= create_tmp_packfile(&pack_tmp_name
);
1030 offset
= write_pack_header(f
, nr_remaining
);
1032 if (reuse_packfile
) {
1033 assert(pack_to_stdout
);
1034 write_reused_pack(f
);
1035 offset
= hashfile_total(f
);
1039 for (; i
< to_pack
.nr_objects
; i
++) {
1040 struct object_entry
*e
= write_order
[i
];
1041 if (write_one(f
, e
, &offset
) == WRITE_ONE_BREAK
)
1043 display_progress(progress_state
, written
);
1047 * Did we write the wrong # entries in the header?
1048 * If so, rewrite it like in fast-import
1050 if (pack_to_stdout
) {
1051 finalize_hashfile(f
, oid
.hash
, CSUM_HASH_IN_STREAM
| CSUM_CLOSE
);
1052 } else if (nr_written
== nr_remaining
) {
1053 finalize_hashfile(f
, oid
.hash
, CSUM_HASH_IN_STREAM
| CSUM_FSYNC
| CSUM_CLOSE
);
1055 int fd
= finalize_hashfile(f
, oid
.hash
, 0);
1056 fixup_pack_header_footer(fd
, oid
.hash
, pack_tmp_name
,
1057 nr_written
, oid
.hash
, offset
);
1059 if (write_bitmap_index
) {
1060 if (write_bitmap_index
!= WRITE_BITMAP_QUIET
)
1061 warning(_(no_split_warning
));
1062 write_bitmap_index
= 0;
1066 if (!pack_to_stdout
) {
1068 struct strbuf tmpname
= STRBUF_INIT
;
1071 * Packs are runtime accessed in their mtime
1072 * order since newer packs are more likely to contain
1073 * younger objects. So if we are creating multiple
1074 * packs then we should modify the mtime of later ones
1075 * to preserve this property.
1077 if (stat(pack_tmp_name
, &st
) < 0) {
1078 warning_errno(_("failed to stat %s"), pack_tmp_name
);
1079 } else if (!last_mtime
) {
1080 last_mtime
= st
.st_mtime
;
1083 utb
.actime
= st
.st_atime
;
1084 utb
.modtime
= --last_mtime
;
1085 if (utime(pack_tmp_name
, &utb
) < 0)
1086 warning_errno(_("failed utime() on %s"), pack_tmp_name
);
1089 strbuf_addf(&tmpname
, "%s-", base_name
);
1091 if (write_bitmap_index
) {
1092 bitmap_writer_set_checksum(oid
.hash
);
1093 bitmap_writer_build_type_index(
1094 &to_pack
, written_list
, nr_written
);
1097 finish_tmp_packfile(&tmpname
, pack_tmp_name
,
1098 written_list
, nr_written
,
1099 &pack_idx_opts
, oid
.hash
);
1101 if (write_bitmap_index
) {
1102 strbuf_addf(&tmpname
, "%s.bitmap", oid_to_hex(&oid
));
1104 stop_progress(&progress_state
);
1106 bitmap_writer_show_progress(progress
);
1107 bitmap_writer_select_commits(indexed_commits
, indexed_commits_nr
, -1);
1108 bitmap_writer_build(&to_pack
);
1109 bitmap_writer_finish(written_list
, nr_written
,
1110 tmpname
.buf
, write_bitmap_options
);
1111 write_bitmap_index
= 0;
1114 strbuf_release(&tmpname
);
1115 free(pack_tmp_name
);
1116 puts(oid_to_hex(&oid
));
1119 /* mark written objects as written to previous pack */
1120 for (j
= 0; j
< nr_written
; j
++) {
1121 written_list
[j
]->offset
= (off_t
)-1;
1123 nr_remaining
-= nr_written
;
1124 } while (nr_remaining
&& i
< to_pack
.nr_objects
);
1128 stop_progress(&progress_state
);
1129 if (written
!= nr_result
)
1130 die(_("wrote %"PRIu32
" objects while expecting %"PRIu32
),
1131 written
, nr_result
);
1132 trace2_data_intmax("pack-objects", the_repository
,
1133 "write_pack_file/wrote", nr_result
);
1136 static int no_try_delta(const char *path
)
1138 static struct attr_check
*check
;
1141 check
= attr_check_initl("delta", NULL
);
1142 git_check_attr(the_repository
->index
, path
, check
);
1143 if (ATTR_FALSE(check
->items
[0].value
))
1149 * When adding an object, check whether we have already added it
1150 * to our packing list. If so, we can skip. However, if we are
1151 * being asked to excludei t, but the previous mention was to include
1152 * it, make sure to adjust its flags and tweak our numbers accordingly.
1154 * As an optimization, we pass out the index position where we would have
1155 * found the item, since that saves us from having to look it up again a
1156 * few lines later when we want to add the new entry.
1158 static int have_duplicate_entry(const struct object_id
*oid
,
1161 struct object_entry
*entry
;
1163 if (reuse_packfile_bitmap
&&
1164 bitmap_walk_contains(bitmap_git
, reuse_packfile_bitmap
, oid
))
1167 entry
= packlist_find(&to_pack
, oid
);
1172 if (!entry
->preferred_base
)
1174 entry
->preferred_base
= 1;
1180 static int want_found_object(int exclude
, struct packed_git
*p
)
1188 * When asked to do --local (do not include an object that appears in a
1189 * pack we borrow from elsewhere) or --honor-pack-keep (do not include
1190 * an object that appears in a pack marked with .keep), finding a pack
1191 * that matches the criteria is sufficient for us to decide to omit it.
1192 * However, even if this pack does not satisfy the criteria, we need to
1193 * make sure no copy of this object appears in _any_ pack that makes us
1194 * to omit the object, so we need to check all the packs.
1196 * We can however first check whether these options can possible matter;
1197 * if they do not matter we know we want the object in generated pack.
1198 * Otherwise, we signal "-1" at the end to tell the caller that we do
1199 * not know either way, and it needs to check more packs.
1201 if (!ignore_packed_keep_on_disk
&&
1202 !ignore_packed_keep_in_core
&&
1203 (!local
|| !have_non_local_packs
))
1206 if (local
&& !p
->pack_local
)
1208 if (p
->pack_local
&&
1209 ((ignore_packed_keep_on_disk
&& p
->pack_keep
) ||
1210 (ignore_packed_keep_in_core
&& p
->pack_keep_in_core
)))
1213 /* we don't know yet; keep looking for more packs */
1218 * Check whether we want the object in the pack (e.g., we do not want
1219 * objects found in non-local stores if the "--local" option was used).
1221 * If the caller already knows an existing pack it wants to take the object
1222 * from, that is passed in *found_pack and *found_offset; otherwise this
1223 * function finds if there is any pack that has the object and returns the pack
1224 * and its offset in these variables.
1226 static int want_object_in_pack(const struct object_id
*oid
,
1228 struct packed_git
**found_pack
,
1229 off_t
*found_offset
)
1232 struct list_head
*pos
;
1233 struct multi_pack_index
*m
;
1235 if (!exclude
&& local
&& has_loose_object_nonlocal(oid
))
1239 * If we already know the pack object lives in, start checks from that
1240 * pack - in the usual case when neither --local was given nor .keep files
1241 * are present we will determine the answer right now.
1244 want
= want_found_object(exclude
, *found_pack
);
1249 for (m
= get_multi_pack_index(the_repository
); m
; m
= m
->next
) {
1250 struct pack_entry e
;
1251 if (fill_midx_entry(the_repository
, oid
, &e
, m
)) {
1252 struct packed_git
*p
= e
.p
;
1255 if (p
== *found_pack
)
1256 offset
= *found_offset
;
1258 offset
= find_pack_entry_one(oid
->hash
, p
);
1262 if (!is_pack_valid(p
))
1264 *found_offset
= offset
;
1267 want
= want_found_object(exclude
, p
);
1274 list_for_each(pos
, get_packed_git_mru(the_repository
)) {
1275 struct packed_git
*p
= list_entry(pos
, struct packed_git
, mru
);
1278 if (p
== *found_pack
)
1279 offset
= *found_offset
;
1281 offset
= find_pack_entry_one(oid
->hash
, p
);
1285 if (!is_pack_valid(p
))
1287 *found_offset
= offset
;
1290 want
= want_found_object(exclude
, p
);
1291 if (!exclude
&& want
> 0)
1293 get_packed_git_mru(the_repository
));
1299 if (uri_protocols
.nr
) {
1300 struct configured_exclusion
*ex
=
1301 oidmap_get(&configured_exclusions
, oid
);
1306 for (i
= 0; i
< uri_protocols
.nr
; i
++) {
1307 if (skip_prefix(ex
->uri
,
1308 uri_protocols
.items
[i
].string
,
1311 oidset_insert(&excluded_by_config
, oid
);
1321 static void create_object_entry(const struct object_id
*oid
,
1322 enum object_type type
,
1326 struct packed_git
*found_pack
,
1329 struct object_entry
*entry
;
1331 entry
= packlist_alloc(&to_pack
, oid
);
1333 oe_set_type(entry
, type
);
1335 entry
->preferred_base
= 1;
1339 oe_set_in_pack(&to_pack
, entry
, found_pack
);
1340 entry
->in_pack_offset
= found_offset
;
1343 entry
->no_try_delta
= no_try_delta
;
1346 static const char no_closure_warning
[] = N_(
1347 "disabling bitmap writing, as some objects are not being packed"
1350 static int add_object_entry(const struct object_id
*oid
, enum object_type type
,
1351 const char *name
, int exclude
)
1353 struct packed_git
*found_pack
= NULL
;
1354 off_t found_offset
= 0;
1356 display_progress(progress_state
, ++nr_seen
);
1358 if (have_duplicate_entry(oid
, exclude
))
1361 if (!want_object_in_pack(oid
, exclude
, &found_pack
, &found_offset
)) {
1362 /* The pack is missing an object, so it will not have closure */
1363 if (write_bitmap_index
) {
1364 if (write_bitmap_index
!= WRITE_BITMAP_QUIET
)
1365 warning(_(no_closure_warning
));
1366 write_bitmap_index
= 0;
1371 create_object_entry(oid
, type
, pack_name_hash(name
),
1372 exclude
, name
&& no_try_delta(name
),
1373 found_pack
, found_offset
);
1377 static int add_object_entry_from_bitmap(const struct object_id
*oid
,
1378 enum object_type type
,
1379 int flags
, uint32_t name_hash
,
1380 struct packed_git
*pack
, off_t offset
)
1382 display_progress(progress_state
, ++nr_seen
);
1384 if (have_duplicate_entry(oid
, 0))
1387 if (!want_object_in_pack(oid
, 0, &pack
, &offset
))
1390 create_object_entry(oid
, type
, name_hash
, 0, 0, pack
, offset
);
1394 struct pbase_tree_cache
{
1395 struct object_id oid
;
1399 unsigned long tree_size
;
1402 static struct pbase_tree_cache
*(pbase_tree_cache
[256]);
1403 static int pbase_tree_cache_ix(const struct object_id
*oid
)
1405 return oid
->hash
[0] % ARRAY_SIZE(pbase_tree_cache
);
1407 static int pbase_tree_cache_ix_incr(int ix
)
1409 return (ix
+1) % ARRAY_SIZE(pbase_tree_cache
);
1412 static struct pbase_tree
{
1413 struct pbase_tree
*next
;
1414 /* This is a phony "cache" entry; we are not
1415 * going to evict it or find it through _get()
1416 * mechanism -- this is for the toplevel node that
1417 * would almost always change with any commit.
1419 struct pbase_tree_cache pcache
;
1422 static struct pbase_tree_cache
*pbase_tree_get(const struct object_id
*oid
)
1424 struct pbase_tree_cache
*ent
, *nent
;
1427 enum object_type type
;
1429 int my_ix
= pbase_tree_cache_ix(oid
);
1430 int available_ix
= -1;
1432 /* pbase-tree-cache acts as a limited hashtable.
1433 * your object will be found at your index or within a few
1434 * slots after that slot if it is cached.
1436 for (neigh
= 0; neigh
< 8; neigh
++) {
1437 ent
= pbase_tree_cache
[my_ix
];
1438 if (ent
&& oideq(&ent
->oid
, oid
)) {
1442 else if (((available_ix
< 0) && (!ent
|| !ent
->ref
)) ||
1443 ((0 <= available_ix
) &&
1444 (!ent
&& pbase_tree_cache
[available_ix
])))
1445 available_ix
= my_ix
;
1448 my_ix
= pbase_tree_cache_ix_incr(my_ix
);
1451 /* Did not find one. Either we got a bogus request or
1452 * we need to read and perhaps cache.
1454 data
= read_object_file(oid
, &type
, &size
);
1457 if (type
!= OBJ_TREE
) {
1462 /* We need to either cache or return a throwaway copy */
1464 if (available_ix
< 0)
1467 ent
= pbase_tree_cache
[available_ix
];
1468 my_ix
= available_ix
;
1472 nent
= xmalloc(sizeof(*nent
));
1473 nent
->temporary
= (available_ix
< 0);
1476 /* evict and reuse */
1477 free(ent
->tree_data
);
1480 oidcpy(&nent
->oid
, oid
);
1481 nent
->tree_data
= data
;
1482 nent
->tree_size
= size
;
1484 if (!nent
->temporary
)
1485 pbase_tree_cache
[my_ix
] = nent
;
1489 static void pbase_tree_put(struct pbase_tree_cache
*cache
)
1491 if (!cache
->temporary
) {
1495 free(cache
->tree_data
);
1499 static int name_cmp_len(const char *name
)
1502 for (i
= 0; name
[i
] && name
[i
] != '\n' && name
[i
] != '/'; i
++)
1507 static void add_pbase_object(struct tree_desc
*tree
,
1510 const char *fullname
)
1512 struct name_entry entry
;
1515 while (tree_entry(tree
,&entry
)) {
1516 if (S_ISGITLINK(entry
.mode
))
1518 cmp
= tree_entry_len(&entry
) != cmplen
? 1 :
1519 memcmp(name
, entry
.path
, cmplen
);
1524 if (name
[cmplen
] != '/') {
1525 add_object_entry(&entry
.oid
,
1526 object_type(entry
.mode
),
1530 if (S_ISDIR(entry
.mode
)) {
1531 struct tree_desc sub
;
1532 struct pbase_tree_cache
*tree
;
1533 const char *down
= name
+cmplen
+1;
1534 int downlen
= name_cmp_len(down
);
1536 tree
= pbase_tree_get(&entry
.oid
);
1539 init_tree_desc(&sub
, tree
->tree_data
, tree
->tree_size
);
1541 add_pbase_object(&sub
, down
, downlen
, fullname
);
1542 pbase_tree_put(tree
);
1547 static unsigned *done_pbase_paths
;
1548 static int done_pbase_paths_num
;
1549 static int done_pbase_paths_alloc
;
1550 static int done_pbase_path_pos(unsigned hash
)
1553 int hi
= done_pbase_paths_num
;
1555 int mi
= lo
+ (hi
- lo
) / 2;
1556 if (done_pbase_paths
[mi
] == hash
)
1558 if (done_pbase_paths
[mi
] < hash
)
1566 static int check_pbase_path(unsigned hash
)
1568 int pos
= done_pbase_path_pos(hash
);
1572 ALLOC_GROW(done_pbase_paths
,
1573 done_pbase_paths_num
+ 1,
1574 done_pbase_paths_alloc
);
1575 done_pbase_paths_num
++;
1576 if (pos
< done_pbase_paths_num
)
1577 MOVE_ARRAY(done_pbase_paths
+ pos
+ 1, done_pbase_paths
+ pos
,
1578 done_pbase_paths_num
- pos
- 1);
1579 done_pbase_paths
[pos
] = hash
;
1583 static void add_preferred_base_object(const char *name
)
1585 struct pbase_tree
*it
;
1587 unsigned hash
= pack_name_hash(name
);
1589 if (!num_preferred_base
|| check_pbase_path(hash
))
1592 cmplen
= name_cmp_len(name
);
1593 for (it
= pbase_tree
; it
; it
= it
->next
) {
1595 add_object_entry(&it
->pcache
.oid
, OBJ_TREE
, NULL
, 1);
1598 struct tree_desc tree
;
1599 init_tree_desc(&tree
, it
->pcache
.tree_data
, it
->pcache
.tree_size
);
1600 add_pbase_object(&tree
, name
, cmplen
, name
);
1605 static void add_preferred_base(struct object_id
*oid
)
1607 struct pbase_tree
*it
;
1610 struct object_id tree_oid
;
1612 if (window
<= num_preferred_base
++)
1615 data
= read_object_with_reference(the_repository
, oid
,
1616 tree_type
, &size
, &tree_oid
);
1620 for (it
= pbase_tree
; it
; it
= it
->next
) {
1621 if (oideq(&it
->pcache
.oid
, &tree_oid
)) {
1627 it
= xcalloc(1, sizeof(*it
));
1628 it
->next
= pbase_tree
;
1631 oidcpy(&it
->pcache
.oid
, &tree_oid
);
1632 it
->pcache
.tree_data
= data
;
1633 it
->pcache
.tree_size
= size
;
1636 static void cleanup_preferred_base(void)
1638 struct pbase_tree
*it
;
1644 struct pbase_tree
*tmp
= it
;
1646 free(tmp
->pcache
.tree_data
);
1650 for (i
= 0; i
< ARRAY_SIZE(pbase_tree_cache
); i
++) {
1651 if (!pbase_tree_cache
[i
])
1653 free(pbase_tree_cache
[i
]->tree_data
);
1654 FREE_AND_NULL(pbase_tree_cache
[i
]);
1657 FREE_AND_NULL(done_pbase_paths
);
1658 done_pbase_paths_num
= done_pbase_paths_alloc
= 0;
1662 * Return 1 iff the object specified by "delta" can be sent
1663 * literally as a delta against the base in "base_sha1". If
1664 * so, then *base_out will point to the entry in our packing
1665 * list, or NULL if we must use the external-base list.
1667 * Depth value does not matter - find_deltas() will
1668 * never consider reused delta as the base object to
1669 * deltify other objects against, in order to avoid
1672 static int can_reuse_delta(const struct object_id
*base_oid
,
1673 struct object_entry
*delta
,
1674 struct object_entry
**base_out
)
1676 struct object_entry
*base
;
1679 * First see if we're already sending the base (or it's explicitly in
1680 * our "excluded" list).
1682 base
= packlist_find(&to_pack
, base_oid
);
1684 if (!in_same_island(&delta
->idx
.oid
, &base
->idx
.oid
))
1691 * Otherwise, reachability bitmaps may tell us if the receiver has it,
1692 * even if it was buried too deep in history to make it into the
1695 if (thin
&& bitmap_has_oid_in_uninteresting(bitmap_git
, base_oid
)) {
1696 if (use_delta_islands
) {
1697 if (!in_same_island(&delta
->idx
.oid
, base_oid
))
1707 static void prefetch_to_pack(uint32_t object_index_start
) {
1708 struct oid_array to_fetch
= OID_ARRAY_INIT
;
1711 for (i
= object_index_start
; i
< to_pack
.nr_objects
; i
++) {
1712 struct object_entry
*entry
= to_pack
.objects
+ i
;
1714 if (!oid_object_info_extended(the_repository
,
1717 OBJECT_INFO_FOR_PREFETCH
))
1719 oid_array_append(&to_fetch
, &entry
->idx
.oid
);
1721 promisor_remote_get_direct(the_repository
,
1722 to_fetch
.oid
, to_fetch
.nr
);
1723 oid_array_clear(&to_fetch
);
1726 static void check_object(struct object_entry
*entry
, uint32_t object_index
)
1728 unsigned long canonical_size
;
1729 enum object_type type
;
1730 struct object_info oi
= {.typep
= &type
, .sizep
= &canonical_size
};
1732 if (IN_PACK(entry
)) {
1733 struct packed_git
*p
= IN_PACK(entry
);
1734 struct pack_window
*w_curs
= NULL
;
1736 struct object_id base_ref
;
1737 struct object_entry
*base_entry
;
1738 unsigned long used
, used_0
;
1739 unsigned long avail
;
1741 unsigned char *buf
, c
;
1742 enum object_type type
;
1743 unsigned long in_pack_size
;
1745 buf
= use_pack(p
, &w_curs
, entry
->in_pack_offset
, &avail
);
1748 * We want in_pack_type even if we do not reuse delta
1749 * since non-delta representations could still be reused.
1751 used
= unpack_object_header_buffer(buf
, avail
,
1758 BUG("invalid type %d", type
);
1759 entry
->in_pack_type
= type
;
1762 * Determine if this is a delta and if so whether we can
1763 * reuse it or not. Otherwise let's find out as cheaply as
1764 * possible what the actual type and size for this object is.
1766 switch (entry
->in_pack_type
) {
1768 /* Not a delta hence we've already got all we need. */
1769 oe_set_type(entry
, entry
->in_pack_type
);
1770 SET_SIZE(entry
, in_pack_size
);
1771 entry
->in_pack_header_size
= used
;
1772 if (oe_type(entry
) < OBJ_COMMIT
|| oe_type(entry
) > OBJ_BLOB
)
1774 unuse_pack(&w_curs
);
1777 if (reuse_delta
&& !entry
->preferred_base
) {
1779 use_pack(p
, &w_curs
,
1780 entry
->in_pack_offset
+ used
,
1784 entry
->in_pack_header_size
= used
+ the_hash_algo
->rawsz
;
1787 buf
= use_pack(p
, &w_curs
,
1788 entry
->in_pack_offset
+ used
, NULL
);
1794 if (!ofs
|| MSB(ofs
, 7)) {
1795 error(_("delta base offset overflow in pack for %s"),
1796 oid_to_hex(&entry
->idx
.oid
));
1800 ofs
= (ofs
<< 7) + (c
& 127);
1802 ofs
= entry
->in_pack_offset
- ofs
;
1803 if (ofs
<= 0 || ofs
>= entry
->in_pack_offset
) {
1804 error(_("delta base offset out of bound for %s"),
1805 oid_to_hex(&entry
->idx
.oid
));
1808 if (reuse_delta
&& !entry
->preferred_base
) {
1809 struct revindex_entry
*revidx
;
1810 revidx
= find_pack_revindex(p
, ofs
);
1813 if (!nth_packed_object_id(&base_ref
, p
, revidx
->nr
))
1816 entry
->in_pack_header_size
= used
+ used_0
;
1821 can_reuse_delta(&base_ref
, entry
, &base_entry
)) {
1822 oe_set_type(entry
, entry
->in_pack_type
);
1823 SET_SIZE(entry
, in_pack_size
); /* delta size */
1824 SET_DELTA_SIZE(entry
, in_pack_size
);
1827 SET_DELTA(entry
, base_entry
);
1828 entry
->delta_sibling_idx
= base_entry
->delta_child_idx
;
1829 SET_DELTA_CHILD(base_entry
, entry
);
1831 SET_DELTA_EXT(entry
, &base_ref
);
1834 unuse_pack(&w_curs
);
1838 if (oe_type(entry
)) {
1842 * This must be a delta and we already know what the
1843 * final object type is. Let's extract the actual
1844 * object size from the delta header.
1846 delta_pos
= entry
->in_pack_offset
+ entry
->in_pack_header_size
;
1847 canonical_size
= get_size_from_delta(p
, &w_curs
, delta_pos
);
1848 if (canonical_size
== 0)
1850 SET_SIZE(entry
, canonical_size
);
1851 unuse_pack(&w_curs
);
1856 * No choice but to fall back to the recursive delta walk
1857 * with oid_object_info() to find about the object type
1861 unuse_pack(&w_curs
);
1864 if (oid_object_info_extended(the_repository
, &entry
->idx
.oid
, &oi
,
1865 OBJECT_INFO_SKIP_FETCH_OBJECT
| OBJECT_INFO_LOOKUP_REPLACE
) < 0) {
1866 if (has_promisor_remote()) {
1867 prefetch_to_pack(object_index
);
1868 if (oid_object_info_extended(the_repository
, &entry
->idx
.oid
, &oi
,
1869 OBJECT_INFO_SKIP_FETCH_OBJECT
| OBJECT_INFO_LOOKUP_REPLACE
) < 0)
1875 oe_set_type(entry
, type
);
1876 if (entry
->type_valid
) {
1877 SET_SIZE(entry
, canonical_size
);
1880 * Bad object type is checked in prepare_pack(). This is
1881 * to permit a missing preferred base object to be ignored
1882 * as a preferred base. Doing so can result in a larger
1883 * pack file, but the transfer will still take place.
1888 static int pack_offset_sort(const void *_a
, const void *_b
)
1890 const struct object_entry
*a
= *(struct object_entry
**)_a
;
1891 const struct object_entry
*b
= *(struct object_entry
**)_b
;
1892 const struct packed_git
*a_in_pack
= IN_PACK(a
);
1893 const struct packed_git
*b_in_pack
= IN_PACK(b
);
1895 /* avoid filesystem trashing with loose objects */
1896 if (!a_in_pack
&& !b_in_pack
)
1897 return oidcmp(&a
->idx
.oid
, &b
->idx
.oid
);
1899 if (a_in_pack
< b_in_pack
)
1901 if (a_in_pack
> b_in_pack
)
1903 return a
->in_pack_offset
< b
->in_pack_offset
? -1 :
1904 (a
->in_pack_offset
> b
->in_pack_offset
);
1908 * Drop an on-disk delta we were planning to reuse. Naively, this would
1909 * just involve blanking out the "delta" field, but we have to deal
1910 * with some extra book-keeping:
1912 * 1. Removing ourselves from the delta_sibling linked list.
1914 * 2. Updating our size/type to the non-delta representation. These were
1915 * either not recorded initially (size) or overwritten with the delta type
1916 * (type) when check_object() decided to reuse the delta.
1918 * 3. Resetting our delta depth, as we are now a base object.
1920 static void drop_reused_delta(struct object_entry
*entry
)
1922 unsigned *idx
= &to_pack
.objects
[entry
->delta_idx
- 1].delta_child_idx
;
1923 struct object_info oi
= OBJECT_INFO_INIT
;
1924 enum object_type type
;
1928 struct object_entry
*oe
= &to_pack
.objects
[*idx
- 1];
1931 *idx
= oe
->delta_sibling_idx
;
1933 idx
= &oe
->delta_sibling_idx
;
1935 SET_DELTA(entry
, NULL
);
1940 if (packed_object_info(the_repository
, IN_PACK(entry
), entry
->in_pack_offset
, &oi
) < 0) {
1942 * We failed to get the info from this pack for some reason;
1943 * fall back to oid_object_info, which may find another copy.
1944 * And if that fails, the error will be recorded in oe_type(entry)
1945 * and dealt with in prepare_pack().
1948 oid_object_info(the_repository
, &entry
->idx
.oid
, &size
));
1950 oe_set_type(entry
, type
);
1952 SET_SIZE(entry
, size
);
1956 * Follow the chain of deltas from this entry onward, throwing away any links
1957 * that cause us to hit a cycle (as determined by the DFS state flags in
1960 * We also detect too-long reused chains that would violate our --depth
1963 static void break_delta_chains(struct object_entry
*entry
)
1966 * The actual depth of each object we will write is stored as an int,
1967 * as it cannot exceed our int "depth" limit. But before we break
1968 * changes based no that limit, we may potentially go as deep as the
1969 * number of objects, which is elsewhere bounded to a uint32_t.
1971 uint32_t total_depth
;
1972 struct object_entry
*cur
, *next
;
1974 for (cur
= entry
, total_depth
= 0;
1976 cur
= DELTA(cur
), total_depth
++) {
1977 if (cur
->dfs_state
== DFS_DONE
) {
1979 * We've already seen this object and know it isn't
1980 * part of a cycle. We do need to append its depth
1983 total_depth
+= cur
->depth
;
1988 * We break cycles before looping, so an ACTIVE state (or any
1989 * other cruft which made its way into the state variable)
1992 if (cur
->dfs_state
!= DFS_NONE
)
1993 BUG("confusing delta dfs state in first pass: %d",
1997 * Now we know this is the first time we've seen the object. If
1998 * it's not a delta, we're done traversing, but we'll mark it
1999 * done to save time on future traversals.
2002 cur
->dfs_state
= DFS_DONE
;
2007 * Mark ourselves as active and see if the next step causes
2008 * us to cycle to another active object. It's important to do
2009 * this _before_ we loop, because it impacts where we make the
2010 * cut, and thus how our total_depth counter works.
2011 * E.g., We may see a partial loop like:
2013 * A -> B -> C -> D -> B
2015 * Cutting B->C breaks the cycle. But now the depth of A is
2016 * only 1, and our total_depth counter is at 3. The size of the
2017 * error is always one less than the size of the cycle we
2018 * broke. Commits C and D were "lost" from A's chain.
2020 * If we instead cut D->B, then the depth of A is correct at 3.
2021 * We keep all commits in the chain that we examined.
2023 cur
->dfs_state
= DFS_ACTIVE
;
2024 if (DELTA(cur
)->dfs_state
== DFS_ACTIVE
) {
2025 drop_reused_delta(cur
);
2026 cur
->dfs_state
= DFS_DONE
;
2032 * And now that we've gone all the way to the bottom of the chain, we
2033 * need to clear the active flags and set the depth fields as
2034 * appropriate. Unlike the loop above, which can quit when it drops a
2035 * delta, we need to keep going to look for more depth cuts. So we need
2036 * an extra "next" pointer to keep going after we reset cur->delta.
2038 for (cur
= entry
; cur
; cur
= next
) {
2042 * We should have a chain of zero or more ACTIVE states down to
2043 * a final DONE. We can quit after the DONE, because either it
2044 * has no bases, or we've already handled them in a previous
2047 if (cur
->dfs_state
== DFS_DONE
)
2049 else if (cur
->dfs_state
!= DFS_ACTIVE
)
2050 BUG("confusing delta dfs state in second pass: %d",
2054 * If the total_depth is more than depth, then we need to snip
2055 * the chain into two or more smaller chains that don't exceed
2056 * the maximum depth. Most of the resulting chains will contain
2057 * (depth + 1) entries (i.e., depth deltas plus one base), and
2058 * the last chain (i.e., the one containing entry) will contain
2059 * whatever entries are left over, namely
2060 * (total_depth % (depth + 1)) of them.
2062 * Since we are iterating towards decreasing depth, we need to
2063 * decrement total_depth as we go, and we need to write to the
2064 * entry what its final depth will be after all of the
2065 * snipping. Since we're snipping into chains of length (depth
2066 * + 1) entries, the final depth of an entry will be its
2067 * original depth modulo (depth + 1). Any time we encounter an
2068 * entry whose final depth is supposed to be zero, we snip it
2069 * from its delta base, thereby making it so.
2071 cur
->depth
= (total_depth
--) % (depth
+ 1);
2073 drop_reused_delta(cur
);
2075 cur
->dfs_state
= DFS_DONE
;
2079 static void get_object_details(void)
2082 struct object_entry
**sorted_by_offset
;
2085 progress_state
= start_progress(_("Counting objects"),
2086 to_pack
.nr_objects
);
2088 sorted_by_offset
= xcalloc(to_pack
.nr_objects
, sizeof(struct object_entry
*));
2089 for (i
= 0; i
< to_pack
.nr_objects
; i
++)
2090 sorted_by_offset
[i
] = to_pack
.objects
+ i
;
2091 QSORT(sorted_by_offset
, to_pack
.nr_objects
, pack_offset_sort
);
2093 for (i
= 0; i
< to_pack
.nr_objects
; i
++) {
2094 struct object_entry
*entry
= sorted_by_offset
[i
];
2095 check_object(entry
, i
);
2096 if (entry
->type_valid
&&
2097 oe_size_greater_than(&to_pack
, entry
, big_file_threshold
))
2098 entry
->no_try_delta
= 1;
2099 display_progress(progress_state
, i
+ 1);
2101 stop_progress(&progress_state
);
2104 * This must happen in a second pass, since we rely on the delta
2105 * information for the whole list being completed.
2107 for (i
= 0; i
< to_pack
.nr_objects
; i
++)
2108 break_delta_chains(&to_pack
.objects
[i
]);
2110 free(sorted_by_offset
);
2114 * We search for deltas in a list sorted by type, by filename hash, and then
2115 * by size, so that we see progressively smaller and smaller files.
2116 * That's because we prefer deltas to be from the bigger file
2117 * to the smaller -- deletes are potentially cheaper, but perhaps
2118 * more importantly, the bigger file is likely the more recent
2119 * one. The deepest deltas are therefore the oldest objects which are
2120 * less susceptible to be accessed often.
2122 static int type_size_sort(const void *_a
, const void *_b
)
2124 const struct object_entry
*a
= *(struct object_entry
**)_a
;
2125 const struct object_entry
*b
= *(struct object_entry
**)_b
;
2126 const enum object_type a_type
= oe_type(a
);
2127 const enum object_type b_type
= oe_type(b
);
2128 const unsigned long a_size
= SIZE(a
);
2129 const unsigned long b_size
= SIZE(b
);
2131 if (a_type
> b_type
)
2133 if (a_type
< b_type
)
2135 if (a
->hash
> b
->hash
)
2137 if (a
->hash
< b
->hash
)
2139 if (a
->preferred_base
> b
->preferred_base
)
2141 if (a
->preferred_base
< b
->preferred_base
)
2143 if (use_delta_islands
) {
2144 const int island_cmp
= island_delta_cmp(&a
->idx
.oid
, &b
->idx
.oid
);
2148 if (a_size
> b_size
)
2150 if (a_size
< b_size
)
2152 return a
< b
? -1 : (a
> b
); /* newest first */
2156 struct object_entry
*entry
;
2158 struct delta_index
*index
;
2162 static int delta_cacheable(unsigned long src_size
, unsigned long trg_size
,
2163 unsigned long delta_size
)
2165 if (max_delta_cache_size
&& delta_cache_size
+ delta_size
> max_delta_cache_size
)
2168 if (delta_size
< cache_max_small_delta_size
)
2171 /* cache delta, if objects are large enough compared to delta size */
2172 if ((src_size
>> 20) + (trg_size
>> 21) > (delta_size
>> 10))
2178 /* Protect delta_cache_size */
2179 static pthread_mutex_t cache_mutex
;
2180 #define cache_lock() pthread_mutex_lock(&cache_mutex)
2181 #define cache_unlock() pthread_mutex_unlock(&cache_mutex)
2184 * Protect object list partitioning (e.g. struct thread_param) and
2187 static pthread_mutex_t progress_mutex
;
2188 #define progress_lock() pthread_mutex_lock(&progress_mutex)
2189 #define progress_unlock() pthread_mutex_unlock(&progress_mutex)
2192 * Access to struct object_entry is unprotected since each thread owns
2193 * a portion of the main object list. Just don't access object entries
2194 * ahead in the list because they can be stolen and would need
2195 * progress_mutex for protection.
2199 * Return the size of the object without doing any delta
2200 * reconstruction (so non-deltas are true object sizes, but deltas
2201 * return the size of the delta data).
2203 unsigned long oe_get_size_slow(struct packing_data
*pack
,
2204 const struct object_entry
*e
)
2206 struct packed_git
*p
;
2207 struct pack_window
*w_curs
;
2209 enum object_type type
;
2210 unsigned long used
, avail
, size
;
2212 if (e
->type_
!= OBJ_OFS_DELTA
&& e
->type_
!= OBJ_REF_DELTA
) {
2213 packing_data_lock(&to_pack
);
2214 if (oid_object_info(the_repository
, &e
->idx
.oid
, &size
) < 0)
2215 die(_("unable to get size of %s"),
2216 oid_to_hex(&e
->idx
.oid
));
2217 packing_data_unlock(&to_pack
);
2221 p
= oe_in_pack(pack
, e
);
2223 BUG("when e->type is a delta, it must belong to a pack");
2225 packing_data_lock(&to_pack
);
2227 buf
= use_pack(p
, &w_curs
, e
->in_pack_offset
, &avail
);
2228 used
= unpack_object_header_buffer(buf
, avail
, &type
, &size
);
2230 die(_("unable to parse object header of %s"),
2231 oid_to_hex(&e
->idx
.oid
));
2233 unuse_pack(&w_curs
);
2234 packing_data_unlock(&to_pack
);
2238 static int try_delta(struct unpacked
*trg
, struct unpacked
*src
,
2239 unsigned max_depth
, unsigned long *mem_usage
)
2241 struct object_entry
*trg_entry
= trg
->entry
;
2242 struct object_entry
*src_entry
= src
->entry
;
2243 unsigned long trg_size
, src_size
, delta_size
, sizediff
, max_size
, sz
;
2245 enum object_type type
;
2248 /* Don't bother doing diffs between different types */
2249 if (oe_type(trg_entry
) != oe_type(src_entry
))
2253 * We do not bother to try a delta that we discarded on an
2254 * earlier try, but only when reusing delta data. Note that
2255 * src_entry that is marked as the preferred_base should always
2256 * be considered, as even if we produce a suboptimal delta against
2257 * it, we will still save the transfer cost, as we already know
2258 * the other side has it and we won't send src_entry at all.
2260 if (reuse_delta
&& IN_PACK(trg_entry
) &&
2261 IN_PACK(trg_entry
) == IN_PACK(src_entry
) &&
2262 !src_entry
->preferred_base
&&
2263 trg_entry
->in_pack_type
!= OBJ_REF_DELTA
&&
2264 trg_entry
->in_pack_type
!= OBJ_OFS_DELTA
)
2267 /* Let's not bust the allowed depth. */
2268 if (src
->depth
>= max_depth
)
2271 /* Now some size filtering heuristics. */
2272 trg_size
= SIZE(trg_entry
);
2273 if (!DELTA(trg_entry
)) {
2274 max_size
= trg_size
/2 - the_hash_algo
->rawsz
;
2277 max_size
= DELTA_SIZE(trg_entry
);
2278 ref_depth
= trg
->depth
;
2280 max_size
= (uint64_t)max_size
* (max_depth
- src
->depth
) /
2281 (max_depth
- ref_depth
+ 1);
2284 src_size
= SIZE(src_entry
);
2285 sizediff
= src_size
< trg_size
? trg_size
- src_size
: 0;
2286 if (sizediff
>= max_size
)
2288 if (trg_size
< src_size
/ 32)
2291 if (!in_same_island(&trg
->entry
->idx
.oid
, &src
->entry
->idx
.oid
))
2294 /* Load data if not already done */
2296 packing_data_lock(&to_pack
);
2297 trg
->data
= read_object_file(&trg_entry
->idx
.oid
, &type
, &sz
);
2298 packing_data_unlock(&to_pack
);
2300 die(_("object %s cannot be read"),
2301 oid_to_hex(&trg_entry
->idx
.oid
));
2303 die(_("object %s inconsistent object length (%"PRIuMAX
" vs %"PRIuMAX
")"),
2304 oid_to_hex(&trg_entry
->idx
.oid
), (uintmax_t)sz
,
2305 (uintmax_t)trg_size
);
2309 packing_data_lock(&to_pack
);
2310 src
->data
= read_object_file(&src_entry
->idx
.oid
, &type
, &sz
);
2311 packing_data_unlock(&to_pack
);
2313 if (src_entry
->preferred_base
) {
2314 static int warned
= 0;
2316 warning(_("object %s cannot be read"),
2317 oid_to_hex(&src_entry
->idx
.oid
));
2319 * Those objects are not included in the
2320 * resulting pack. Be resilient and ignore
2321 * them if they can't be read, in case the
2322 * pack could be created nevertheless.
2326 die(_("object %s cannot be read"),
2327 oid_to_hex(&src_entry
->idx
.oid
));
2330 die(_("object %s inconsistent object length (%"PRIuMAX
" vs %"PRIuMAX
")"),
2331 oid_to_hex(&src_entry
->idx
.oid
), (uintmax_t)sz
,
2332 (uintmax_t)src_size
);
2336 src
->index
= create_delta_index(src
->data
, src_size
);
2338 static int warned
= 0;
2340 warning(_("suboptimal pack - out of memory"));
2343 *mem_usage
+= sizeof_delta_index(src
->index
);
2346 delta_buf
= create_delta(src
->index
, trg
->data
, trg_size
, &delta_size
, max_size
);
2350 if (DELTA(trg_entry
)) {
2351 /* Prefer only shallower same-sized deltas. */
2352 if (delta_size
== DELTA_SIZE(trg_entry
) &&
2353 src
->depth
+ 1 >= trg
->depth
) {
2360 * Handle memory allocation outside of the cache
2361 * accounting lock. Compiler will optimize the strangeness
2362 * away when NO_PTHREADS is defined.
2364 free(trg_entry
->delta_data
);
2366 if (trg_entry
->delta_data
) {
2367 delta_cache_size
-= DELTA_SIZE(trg_entry
);
2368 trg_entry
->delta_data
= NULL
;
2370 if (delta_cacheable(src_size
, trg_size
, delta_size
)) {
2371 delta_cache_size
+= delta_size
;
2373 trg_entry
->delta_data
= xrealloc(delta_buf
, delta_size
);
2379 SET_DELTA(trg_entry
, src_entry
);
2380 SET_DELTA_SIZE(trg_entry
, delta_size
);
2381 trg
->depth
= src
->depth
+ 1;
2386 static unsigned int check_delta_limit(struct object_entry
*me
, unsigned int n
)
2388 struct object_entry
*child
= DELTA_CHILD(me
);
2391 const unsigned int c
= check_delta_limit(child
, n
+ 1);
2394 child
= DELTA_SIBLING(child
);
2399 static unsigned long free_unpacked(struct unpacked
*n
)
2401 unsigned long freed_mem
= sizeof_delta_index(n
->index
);
2402 free_delta_index(n
->index
);
2405 freed_mem
+= SIZE(n
->entry
);
2406 FREE_AND_NULL(n
->data
);
2413 static void find_deltas(struct object_entry
**list
, unsigned *list_size
,
2414 int window
, int depth
, unsigned *processed
)
2416 uint32_t i
, idx
= 0, count
= 0;
2417 struct unpacked
*array
;
2418 unsigned long mem_usage
= 0;
2420 array
= xcalloc(window
, sizeof(struct unpacked
));
2423 struct object_entry
*entry
;
2424 struct unpacked
*n
= array
+ idx
;
2425 int j
, max_depth
, best_base
= -1;
2434 if (!entry
->preferred_base
) {
2436 display_progress(progress_state
, *processed
);
2440 mem_usage
-= free_unpacked(n
);
2443 while (window_memory_limit
&&
2444 mem_usage
> window_memory_limit
&&
2446 const uint32_t tail
= (idx
+ window
- count
) % window
;
2447 mem_usage
-= free_unpacked(array
+ tail
);
2451 /* We do not compute delta to *create* objects we are not
2454 if (entry
->preferred_base
)
2458 * If the current object is at pack edge, take the depth the
2459 * objects that depend on the current object into account
2460 * otherwise they would become too deep.
2463 if (DELTA_CHILD(entry
)) {
2464 max_depth
-= check_delta_limit(entry
, 0);
2472 uint32_t other_idx
= idx
+ j
;
2474 if (other_idx
>= window
)
2475 other_idx
-= window
;
2476 m
= array
+ other_idx
;
2479 ret
= try_delta(n
, m
, max_depth
, &mem_usage
);
2483 best_base
= other_idx
;
2487 * If we decided to cache the delta data, then it is best
2488 * to compress it right away. First because we have to do
2489 * it anyway, and doing it here while we're threaded will
2490 * save a lot of time in the non threaded write phase,
2491 * as well as allow for caching more deltas within
2492 * the same cache size limit.
2494 * But only if not writing to stdout, since in that case
2495 * the network is most likely throttling writes anyway,
2496 * and therefore it is best to go to the write phase ASAP
2497 * instead, as we can afford spending more time compressing
2498 * between writes at that moment.
2500 if (entry
->delta_data
&& !pack_to_stdout
) {
2503 size
= do_compress(&entry
->delta_data
, DELTA_SIZE(entry
));
2504 if (size
< (1U << OE_Z_DELTA_BITS
)) {
2505 entry
->z_delta_size
= size
;
2507 delta_cache_size
-= DELTA_SIZE(entry
);
2508 delta_cache_size
+= entry
->z_delta_size
;
2511 FREE_AND_NULL(entry
->delta_data
);
2512 entry
->z_delta_size
= 0;
2516 /* if we made n a delta, and if n is already at max
2517 * depth, leaving it in the window is pointless. we
2518 * should evict it first.
2520 if (DELTA(entry
) && max_depth
<= n
->depth
)
2524 * Move the best delta base up in the window, after the
2525 * currently deltified object, to keep it longer. It will
2526 * be the first base object to be attempted next.
2529 struct unpacked swap
= array
[best_base
];
2530 int dist
= (window
+ idx
- best_base
) % window
;
2531 int dst
= best_base
;
2533 int src
= (dst
+ 1) % window
;
2534 array
[dst
] = array
[src
];
2542 if (count
+ 1 < window
)
2548 for (i
= 0; i
< window
; ++i
) {
2549 free_delta_index(array
[i
].index
);
2550 free(array
[i
].data
);
2556 * The main object list is split into smaller lists, each is handed to
2559 * The main thread waits on the condition that (at least) one of the workers
2560 * has stopped working (which is indicated in the .working member of
2561 * struct thread_params).
2563 * When a work thread has completed its work, it sets .working to 0 and
2564 * signals the main thread and waits on the condition that .data_ready
2567 * The main thread steals half of the work from the worker that has
2568 * most work left to hand it to the idle worker.
2571 struct thread_params
{
2573 struct object_entry
**list
;
2580 pthread_mutex_t mutex
;
2581 pthread_cond_t cond
;
2582 unsigned *processed
;
2585 static pthread_cond_t progress_cond
;
2588 * Mutex and conditional variable can't be statically-initialized on Windows.
2590 static void init_threaded_search(void)
2592 pthread_mutex_init(&cache_mutex
, NULL
);
2593 pthread_mutex_init(&progress_mutex
, NULL
);
2594 pthread_cond_init(&progress_cond
, NULL
);
2597 static void cleanup_threaded_search(void)
2599 pthread_cond_destroy(&progress_cond
);
2600 pthread_mutex_destroy(&cache_mutex
);
2601 pthread_mutex_destroy(&progress_mutex
);
2604 static void *threaded_find_deltas(void *arg
)
2606 struct thread_params
*me
= arg
;
2609 while (me
->remaining
) {
2612 find_deltas(me
->list
, &me
->remaining
,
2613 me
->window
, me
->depth
, me
->processed
);
2617 pthread_cond_signal(&progress_cond
);
2621 * We must not set ->data_ready before we wait on the
2622 * condition because the main thread may have set it to 1
2623 * before we get here. In order to be sure that new
2624 * work is available if we see 1 in ->data_ready, it
2625 * was initialized to 0 before this thread was spawned
2626 * and we reset it to 0 right away.
2628 pthread_mutex_lock(&me
->mutex
);
2629 while (!me
->data_ready
)
2630 pthread_cond_wait(&me
->cond
, &me
->mutex
);
2632 pthread_mutex_unlock(&me
->mutex
);
2637 /* leave ->working 1 so that this doesn't get more work assigned */
2641 static void ll_find_deltas(struct object_entry
**list
, unsigned list_size
,
2642 int window
, int depth
, unsigned *processed
)
2644 struct thread_params
*p
;
2645 int i
, ret
, active_threads
= 0;
2647 init_threaded_search();
2649 if (delta_search_threads
<= 1) {
2650 find_deltas(list
, &list_size
, window
, depth
, processed
);
2651 cleanup_threaded_search();
2654 if (progress
> pack_to_stdout
)
2655 fprintf_ln(stderr
, _("Delta compression using up to %d threads"),
2656 delta_search_threads
);
2657 p
= xcalloc(delta_search_threads
, sizeof(*p
));
2659 /* Partition the work amongst work threads. */
2660 for (i
= 0; i
< delta_search_threads
; i
++) {
2661 unsigned sub_size
= list_size
/ (delta_search_threads
- i
);
2663 /* don't use too small segments or no deltas will be found */
2664 if (sub_size
< 2*window
&& i
+1 < delta_search_threads
)
2667 p
[i
].window
= window
;
2669 p
[i
].processed
= processed
;
2671 p
[i
].data_ready
= 0;
2673 /* try to split chunks on "path" boundaries */
2674 while (sub_size
&& sub_size
< list_size
&&
2675 list
[sub_size
]->hash
&&
2676 list
[sub_size
]->hash
== list
[sub_size
-1]->hash
)
2680 p
[i
].list_size
= sub_size
;
2681 p
[i
].remaining
= sub_size
;
2684 list_size
-= sub_size
;
2687 /* Start work threads. */
2688 for (i
= 0; i
< delta_search_threads
; i
++) {
2689 if (!p
[i
].list_size
)
2691 pthread_mutex_init(&p
[i
].mutex
, NULL
);
2692 pthread_cond_init(&p
[i
].cond
, NULL
);
2693 ret
= pthread_create(&p
[i
].thread
, NULL
,
2694 threaded_find_deltas
, &p
[i
]);
2696 die(_("unable to create thread: %s"), strerror(ret
));
2701 * Now let's wait for work completion. Each time a thread is done
2702 * with its work, we steal half of the remaining work from the
2703 * thread with the largest number of unprocessed objects and give
2704 * it to that newly idle thread. This ensure good load balancing
2705 * until the remaining object list segments are simply too short
2706 * to be worth splitting anymore.
2708 while (active_threads
) {
2709 struct thread_params
*target
= NULL
;
2710 struct thread_params
*victim
= NULL
;
2711 unsigned sub_size
= 0;
2715 for (i
= 0; !target
&& i
< delta_search_threads
; i
++)
2720 pthread_cond_wait(&progress_cond
, &progress_mutex
);
2723 for (i
= 0; i
< delta_search_threads
; i
++)
2724 if (p
[i
].remaining
> 2*window
&&
2725 (!victim
|| victim
->remaining
< p
[i
].remaining
))
2728 sub_size
= victim
->remaining
/ 2;
2729 list
= victim
->list
+ victim
->list_size
- sub_size
;
2730 while (sub_size
&& list
[0]->hash
&&
2731 list
[0]->hash
== list
[-1]->hash
) {
2737 * It is possible for some "paths" to have
2738 * so many objects that no hash boundary
2739 * might be found. Let's just steal the
2740 * exact half in that case.
2742 sub_size
= victim
->remaining
/ 2;
2745 target
->list
= list
;
2746 victim
->list_size
-= sub_size
;
2747 victim
->remaining
-= sub_size
;
2749 target
->list_size
= sub_size
;
2750 target
->remaining
= sub_size
;
2751 target
->working
= 1;
2754 pthread_mutex_lock(&target
->mutex
);
2755 target
->data_ready
= 1;
2756 pthread_cond_signal(&target
->cond
);
2757 pthread_mutex_unlock(&target
->mutex
);
2760 pthread_join(target
->thread
, NULL
);
2761 pthread_cond_destroy(&target
->cond
);
2762 pthread_mutex_destroy(&target
->mutex
);
2766 cleanup_threaded_search();
2770 static int obj_is_packed(const struct object_id
*oid
)
2772 return packlist_find(&to_pack
, oid
) ||
2773 (reuse_packfile_bitmap
&&
2774 bitmap_walk_contains(bitmap_git
, reuse_packfile_bitmap
, oid
));
2777 static void add_tag_chain(const struct object_id
*oid
)
2782 * We catch duplicates already in add_object_entry(), but we'd
2783 * prefer to do this extra check to avoid having to parse the
2784 * tag at all if we already know that it's being packed (e.g., if
2785 * it was included via bitmaps, we would not have parsed it
2788 if (obj_is_packed(oid
))
2791 tag
= lookup_tag(the_repository
, oid
);
2793 if (!tag
|| parse_tag(tag
) || !tag
->tagged
)
2794 die(_("unable to pack objects reachable from tag %s"),
2797 add_object_entry(&tag
->object
.oid
, OBJ_TAG
, NULL
, 0);
2799 if (tag
->tagged
->type
!= OBJ_TAG
)
2802 tag
= (struct tag
*)tag
->tagged
;
2806 static int add_ref_tag(const char *path
, const struct object_id
*oid
, int flag
, void *cb_data
)
2808 struct object_id peeled
;
2810 if (starts_with(path
, "refs/tags/") && /* is a tag? */
2811 !peel_ref(path
, &peeled
) && /* peelable? */
2812 obj_is_packed(&peeled
)) /* object packed? */
2817 static void prepare_pack(int window
, int depth
)
2819 struct object_entry
**delta_list
;
2820 uint32_t i
, nr_deltas
;
2823 if (use_delta_islands
)
2824 resolve_tree_islands(the_repository
, progress
, &to_pack
);
2826 get_object_details();
2829 * If we're locally repacking then we need to be doubly careful
2830 * from now on in order to make sure no stealth corruption gets
2831 * propagated to the new pack. Clients receiving streamed packs
2832 * should validate everything they get anyway so no need to incur
2833 * the additional cost here in that case.
2835 if (!pack_to_stdout
)
2836 do_check_packed_object_crc
= 1;
2838 if (!to_pack
.nr_objects
|| !window
|| !depth
)
2841 ALLOC_ARRAY(delta_list
, to_pack
.nr_objects
);
2844 for (i
= 0; i
< to_pack
.nr_objects
; i
++) {
2845 struct object_entry
*entry
= to_pack
.objects
+ i
;
2848 /* This happens if we decided to reuse existing
2849 * delta from a pack. "reuse_delta &&" is implied.
2853 if (!entry
->type_valid
||
2854 oe_size_less_than(&to_pack
, entry
, 50))
2857 if (entry
->no_try_delta
)
2860 if (!entry
->preferred_base
) {
2862 if (oe_type(entry
) < 0)
2863 die(_("unable to get type of object %s"),
2864 oid_to_hex(&entry
->idx
.oid
));
2866 if (oe_type(entry
) < 0) {
2868 * This object is not found, but we
2869 * don't have to include it anyway.
2875 delta_list
[n
++] = entry
;
2878 if (nr_deltas
&& n
> 1) {
2879 unsigned nr_done
= 0;
2882 progress_state
= start_progress(_("Compressing objects"),
2884 QSORT(delta_list
, n
, type_size_sort
);
2885 ll_find_deltas(delta_list
, n
, window
+1, depth
, &nr_done
);
2886 stop_progress(&progress_state
);
2887 if (nr_done
!= nr_deltas
)
2888 die(_("inconsistency with delta count"));
2893 static int git_pack_config(const char *k
, const char *v
, void *cb
)
2895 if (!strcmp(k
, "pack.window")) {
2896 window
= git_config_int(k
, v
);
2899 if (!strcmp(k
, "pack.windowmemory")) {
2900 window_memory_limit
= git_config_ulong(k
, v
);
2903 if (!strcmp(k
, "pack.depth")) {
2904 depth
= git_config_int(k
, v
);
2907 if (!strcmp(k
, "pack.deltacachesize")) {
2908 max_delta_cache_size
= git_config_int(k
, v
);
2911 if (!strcmp(k
, "pack.deltacachelimit")) {
2912 cache_max_small_delta_size
= git_config_int(k
, v
);
2915 if (!strcmp(k
, "pack.writebitmaphashcache")) {
2916 if (git_config_bool(k
, v
))
2917 write_bitmap_options
|= BITMAP_OPT_HASH_CACHE
;
2919 write_bitmap_options
&= ~BITMAP_OPT_HASH_CACHE
;
2921 if (!strcmp(k
, "pack.usebitmaps")) {
2922 use_bitmap_index_default
= git_config_bool(k
, v
);
2925 if (!strcmp(k
, "pack.allowpackreuse")) {
2926 allow_pack_reuse
= git_config_bool(k
, v
);
2929 if (!strcmp(k
, "pack.threads")) {
2930 delta_search_threads
= git_config_int(k
, v
);
2931 if (delta_search_threads
< 0)
2932 die(_("invalid number of threads specified (%d)"),
2933 delta_search_threads
);
2934 if (!HAVE_THREADS
&& delta_search_threads
!= 1) {
2935 warning(_("no threads support, ignoring %s"), k
);
2936 delta_search_threads
= 0;
2940 if (!strcmp(k
, "pack.indexversion")) {
2941 pack_idx_opts
.version
= git_config_int(k
, v
);
2942 if (pack_idx_opts
.version
> 2)
2943 die(_("bad pack.indexversion=%"PRIu32
),
2944 pack_idx_opts
.version
);
2947 if (!strcmp(k
, "uploadpack.blobpackfileuri")) {
2948 struct configured_exclusion
*ex
= xmalloc(sizeof(*ex
));
2949 const char *oid_end
, *pack_end
;
2951 * Stores the pack hash. This is not a true object ID, but is
2954 struct object_id pack_hash
;
2956 if (parse_oid_hex(v
, &ex
->e
.oid
, &oid_end
) ||
2958 parse_oid_hex(oid_end
+ 1, &pack_hash
, &pack_end
) ||
2960 die(_("value of uploadpack.blobpackfileuri must be "
2961 "of the form '<object-hash> <pack-hash> <uri>' (got '%s')"), v
);
2962 if (oidmap_get(&configured_exclusions
, &ex
->e
.oid
))
2963 die(_("object already configured in another "
2964 "uploadpack.blobpackfileuri (got '%s')"), v
);
2965 ex
->pack_hash_hex
= xcalloc(1, pack_end
- oid_end
);
2966 memcpy(ex
->pack_hash_hex
, oid_end
+ 1, pack_end
- oid_end
- 1);
2967 ex
->uri
= xstrdup(pack_end
+ 1);
2968 oidmap_put(&configured_exclusions
, ex
);
2970 return git_default_config(k
, v
, cb
);
2973 static void read_object_list_from_stdin(void)
2975 char line
[GIT_MAX_HEXSZ
+ 1 + PATH_MAX
+ 2];
2976 struct object_id oid
;
2980 if (!fgets(line
, sizeof(line
), stdin
)) {
2984 die("BUG: fgets returned NULL, not EOF, not error!");
2990 if (line
[0] == '-') {
2991 if (get_oid_hex(line
+1, &oid
))
2992 die(_("expected edge object ID, got garbage:\n %s"),
2994 add_preferred_base(&oid
);
2997 if (parse_oid_hex(line
, &oid
, &p
))
2998 die(_("expected object ID, got garbage:\n %s"), line
);
3000 add_preferred_base_object(p
+ 1);
3001 add_object_entry(&oid
, OBJ_NONE
, p
+ 1, 0);
3005 /* Remember to update object flag allocation in object.h */
3006 #define OBJECT_ADDED (1u<<20)
3008 static void show_commit(struct commit
*commit
, void *data
)
3010 add_object_entry(&commit
->object
.oid
, OBJ_COMMIT
, NULL
, 0);
3011 commit
->object
.flags
|= OBJECT_ADDED
;
3013 if (write_bitmap_index
)
3014 index_commit_for_bitmap(commit
);
3016 if (use_delta_islands
)
3017 propagate_island_marks(commit
);
3020 static void show_object(struct object
*obj
, const char *name
, void *data
)
3022 add_preferred_base_object(name
);
3023 add_object_entry(&obj
->oid
, obj
->type
, name
, 0);
3024 obj
->flags
|= OBJECT_ADDED
;
3026 if (use_delta_islands
) {
3029 struct object_entry
*ent
;
3031 /* the empty string is a root tree, which is depth 0 */
3032 depth
= *name
? 1 : 0;
3033 for (p
= strchr(name
, '/'); p
; p
= strchr(p
+ 1, '/'))
3036 ent
= packlist_find(&to_pack
, &obj
->oid
);
3037 if (ent
&& depth
> oe_tree_depth(&to_pack
, ent
))
3038 oe_set_tree_depth(&to_pack
, ent
, depth
);
3042 static void show_object__ma_allow_any(struct object
*obj
, const char *name
, void *data
)
3044 assert(arg_missing_action
== MA_ALLOW_ANY
);
3047 * Quietly ignore ALL missing objects. This avoids problems with
3048 * staging them now and getting an odd error later.
3050 if (!has_object(the_repository
, &obj
->oid
, 0))
3053 show_object(obj
, name
, data
);
3056 static void show_object__ma_allow_promisor(struct object
*obj
, const char *name
, void *data
)
3058 assert(arg_missing_action
== MA_ALLOW_PROMISOR
);
3061 * Quietly ignore EXPECTED missing objects. This avoids problems with
3062 * staging them now and getting an odd error later.
3064 if (!has_object(the_repository
, &obj
->oid
, 0) && is_promisor_object(&obj
->oid
))
3067 show_object(obj
, name
, data
);
3070 static int option_parse_missing_action(const struct option
*opt
,
3071 const char *arg
, int unset
)
3076 if (!strcmp(arg
, "error")) {
3077 arg_missing_action
= MA_ERROR
;
3078 fn_show_object
= show_object
;
3082 if (!strcmp(arg
, "allow-any")) {
3083 arg_missing_action
= MA_ALLOW_ANY
;
3084 fetch_if_missing
= 0;
3085 fn_show_object
= show_object__ma_allow_any
;
3089 if (!strcmp(arg
, "allow-promisor")) {
3090 arg_missing_action
= MA_ALLOW_PROMISOR
;
3091 fetch_if_missing
= 0;
3092 fn_show_object
= show_object__ma_allow_promisor
;
3096 die(_("invalid value for --missing"));
3100 static void show_edge(struct commit
*commit
)
3102 add_preferred_base(&commit
->object
.oid
);
3105 struct in_pack_object
{
3107 struct object
*object
;
3113 struct in_pack_object
*array
;
3116 static void mark_in_pack_object(struct object
*object
, struct packed_git
*p
, struct in_pack
*in_pack
)
3118 in_pack
->array
[in_pack
->nr
].offset
= find_pack_entry_one(object
->oid
.hash
, p
);
3119 in_pack
->array
[in_pack
->nr
].object
= object
;
3124 * Compare the objects in the offset order, in order to emulate the
3125 * "git rev-list --objects" output that produced the pack originally.
3127 static int ofscmp(const void *a_
, const void *b_
)
3129 struct in_pack_object
*a
= (struct in_pack_object
*)a_
;
3130 struct in_pack_object
*b
= (struct in_pack_object
*)b_
;
3132 if (a
->offset
< b
->offset
)
3134 else if (a
->offset
> b
->offset
)
3137 return oidcmp(&a
->object
->oid
, &b
->object
->oid
);
3140 static void add_objects_in_unpacked_packs(void)
3142 struct packed_git
*p
;
3143 struct in_pack in_pack
;
3146 memset(&in_pack
, 0, sizeof(in_pack
));
3148 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
3149 struct object_id oid
;
3152 if (!p
->pack_local
|| p
->pack_keep
|| p
->pack_keep_in_core
)
3154 if (open_pack_index(p
))
3155 die(_("cannot open pack index"));
3157 ALLOC_GROW(in_pack
.array
,
3158 in_pack
.nr
+ p
->num_objects
,
3161 for (i
= 0; i
< p
->num_objects
; i
++) {
3162 nth_packed_object_id(&oid
, p
, i
);
3163 o
= lookup_unknown_object(&oid
);
3164 if (!(o
->flags
& OBJECT_ADDED
))
3165 mark_in_pack_object(o
, p
, &in_pack
);
3166 o
->flags
|= OBJECT_ADDED
;
3171 QSORT(in_pack
.array
, in_pack
.nr
, ofscmp
);
3172 for (i
= 0; i
< in_pack
.nr
; i
++) {
3173 struct object
*o
= in_pack
.array
[i
].object
;
3174 add_object_entry(&o
->oid
, o
->type
, "", 0);
3177 free(in_pack
.array
);
3180 static int add_loose_object(const struct object_id
*oid
, const char *path
,
3183 enum object_type type
= oid_object_info(the_repository
, oid
, NULL
);
3186 warning(_("loose object at %s could not be examined"), path
);
3190 add_object_entry(oid
, type
, "", 0);
3195 * We actually don't even have to worry about reachability here.
3196 * add_object_entry will weed out duplicates, so we just add every
3197 * loose object we find.
3199 static void add_unreachable_loose_objects(void)
3201 for_each_loose_file_in_objdir(get_object_directory(),
3206 static int has_sha1_pack_kept_or_nonlocal(const struct object_id
*oid
)
3208 static struct packed_git
*last_found
= (void *)1;
3209 struct packed_git
*p
;
3211 p
= (last_found
!= (void *)1) ? last_found
:
3212 get_all_packs(the_repository
);
3215 if ((!p
->pack_local
|| p
->pack_keep
||
3216 p
->pack_keep_in_core
) &&
3217 find_pack_entry_one(oid
->hash
, p
)) {
3221 if (p
== last_found
)
3222 p
= get_all_packs(the_repository
);
3225 if (p
== last_found
)
3232 * Store a list of sha1s that are should not be discarded
3233 * because they are either written too recently, or are
3234 * reachable from another object that was.
3236 * This is filled by get_object_list.
3238 static struct oid_array recent_objects
;
3240 static int loosened_object_can_be_discarded(const struct object_id
*oid
,
3243 if (!unpack_unreachable_expiration
)
3245 if (mtime
> unpack_unreachable_expiration
)
3247 if (oid_array_lookup(&recent_objects
, oid
) >= 0)
3252 static void loosen_unused_packed_objects(void)
3254 struct packed_git
*p
;
3256 struct object_id oid
;
3258 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
3259 if (!p
->pack_local
|| p
->pack_keep
|| p
->pack_keep_in_core
)
3262 if (open_pack_index(p
))
3263 die(_("cannot open pack index"));
3265 for (i
= 0; i
< p
->num_objects
; i
++) {
3266 nth_packed_object_id(&oid
, p
, i
);
3267 if (!packlist_find(&to_pack
, &oid
) &&
3268 !has_sha1_pack_kept_or_nonlocal(&oid
) &&
3269 !loosened_object_can_be_discarded(&oid
, p
->mtime
))
3270 if (force_object_loose(&oid
, p
->mtime
))
3271 die(_("unable to force loose object"));
3277 * This tracks any options which pack-reuse code expects to be on, or which a
3278 * reader of the pack might not understand, and which would therefore prevent
3279 * blind reuse of what we have on disk.
3281 static int pack_options_allow_reuse(void)
3283 return allow_pack_reuse
&&
3285 !ignore_packed_keep_on_disk
&&
3286 !ignore_packed_keep_in_core
&&
3287 (!local
|| !have_non_local_packs
) &&
3291 static int get_object_list_from_bitmap(struct rev_info
*revs
)
3293 if (!(bitmap_git
= prepare_bitmap_walk(revs
, &filter_options
)))
3296 if (pack_options_allow_reuse() &&
3297 !reuse_partial_packfile_from_bitmap(
3300 &reuse_packfile_objects
,
3301 &reuse_packfile_bitmap
)) {
3302 assert(reuse_packfile_objects
);
3303 nr_result
+= reuse_packfile_objects
;
3304 display_progress(progress_state
, nr_result
);
3307 traverse_bitmap_commit_list(bitmap_git
, revs
,
3308 &add_object_entry_from_bitmap
);
3312 static void record_recent_object(struct object
*obj
,
3316 oid_array_append(&recent_objects
, &obj
->oid
);
3319 static void record_recent_commit(struct commit
*commit
, void *data
)
3321 oid_array_append(&recent_objects
, &commit
->object
.oid
);
3324 static void get_object_list(int ac
, const char **av
)
3326 struct rev_info revs
;
3327 struct setup_revision_opt s_r_opt
= {
3328 .allow_exclude_promisor_objects
= 1,
3334 repo_init_revisions(the_repository
, &revs
, NULL
);
3335 save_commit_buffer
= 0;
3336 setup_revisions(ac
, av
, &revs
, &s_r_opt
);
3338 /* make sure shallows are read */
3339 is_repository_shallow(the_repository
);
3341 save_warning
= warn_on_object_refname_ambiguity
;
3342 warn_on_object_refname_ambiguity
= 0;
3344 while (fgets(line
, sizeof(line
), stdin
) != NULL
) {
3345 int len
= strlen(line
);
3346 if (len
&& line
[len
- 1] == '\n')
3351 if (!strcmp(line
, "--not")) {
3352 flags
^= UNINTERESTING
;
3353 write_bitmap_index
= 0;
3356 if (starts_with(line
, "--shallow ")) {
3357 struct object_id oid
;
3358 if (get_oid_hex(line
+ 10, &oid
))
3359 die("not an object name '%s'", line
+ 10);
3360 register_shallow(the_repository
, &oid
);
3361 use_bitmap_index
= 0;
3364 die(_("not a rev '%s'"), line
);
3366 if (handle_revision_arg(line
, &revs
, flags
, REVARG_CANNOT_BE_FILENAME
))
3367 die(_("bad revision '%s'"), line
);
3370 warn_on_object_refname_ambiguity
= save_warning
;
3372 if (use_bitmap_index
&& !get_object_list_from_bitmap(&revs
))
3375 if (use_delta_islands
)
3376 load_delta_islands(the_repository
, progress
);
3378 if (prepare_revision_walk(&revs
))
3379 die(_("revision walk setup failed"));
3380 mark_edges_uninteresting(&revs
, show_edge
, sparse
);
3382 if (!fn_show_object
)
3383 fn_show_object
= show_object
;
3384 traverse_commit_list_filtered(&filter_options
, &revs
,
3385 show_commit
, fn_show_object
, NULL
,
3388 if (unpack_unreachable_expiration
) {
3389 revs
.ignore_missing_links
= 1;
3390 if (add_unseen_recent_objects_to_traversal(&revs
,
3391 unpack_unreachable_expiration
))
3392 die(_("unable to add recent objects"));
3393 if (prepare_revision_walk(&revs
))
3394 die(_("revision walk setup failed"));
3395 traverse_commit_list(&revs
, record_recent_commit
,
3396 record_recent_object
, NULL
);
3399 if (keep_unreachable
)
3400 add_objects_in_unpacked_packs();
3401 if (pack_loose_unreachable
)
3402 add_unreachable_loose_objects();
3403 if (unpack_unreachable
)
3404 loosen_unused_packed_objects();
3406 oid_array_clear(&recent_objects
);
3409 static void add_extra_kept_packs(const struct string_list
*names
)
3411 struct packed_git
*p
;
3416 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
3417 const char *name
= basename(p
->pack_name
);
3423 for (i
= 0; i
< names
->nr
; i
++)
3424 if (!fspathcmp(name
, names
->items
[i
].string
))
3427 if (i
< names
->nr
) {
3428 p
->pack_keep_in_core
= 1;
3429 ignore_packed_keep_in_core
= 1;
3435 static int option_parse_index_version(const struct option
*opt
,
3436 const char *arg
, int unset
)
3439 const char *val
= arg
;
3441 BUG_ON_OPT_NEG(unset
);
3443 pack_idx_opts
.version
= strtoul(val
, &c
, 10);
3444 if (pack_idx_opts
.version
> 2)
3445 die(_("unsupported index version %s"), val
);
3446 if (*c
== ',' && c
[1])
3447 pack_idx_opts
.off32_limit
= strtoul(c
+1, &c
, 0);
3448 if (*c
|| pack_idx_opts
.off32_limit
& 0x80000000)
3449 die(_("bad index version '%s'"), val
);
3453 static int option_parse_unpack_unreachable(const struct option
*opt
,
3454 const char *arg
, int unset
)
3457 unpack_unreachable
= 0;
3458 unpack_unreachable_expiration
= 0;
3461 unpack_unreachable
= 1;
3463 unpack_unreachable_expiration
= approxidate(arg
);
3468 int cmd_pack_objects(int argc
, const char **argv
, const char *prefix
)
3470 int use_internal_rev_list
= 0;
3472 int all_progress_implied
= 0;
3473 struct strvec rp
= STRVEC_INIT
;
3474 int rev_list_unpacked
= 0, rev_list_all
= 0, rev_list_reflog
= 0;
3475 int rev_list_index
= 0;
3476 struct string_list keep_pack_list
= STRING_LIST_INIT_NODUP
;
3477 struct option pack_objects_options
[] = {
3478 OPT_SET_INT('q', "quiet", &progress
,
3479 N_("do not show progress meter"), 0),
3480 OPT_SET_INT(0, "progress", &progress
,
3481 N_("show progress meter"), 1),
3482 OPT_SET_INT(0, "all-progress", &progress
,
3483 N_("show progress meter during object writing phase"), 2),
3484 OPT_BOOL(0, "all-progress-implied",
3485 &all_progress_implied
,
3486 N_("similar to --all-progress when progress meter is shown")),
3487 OPT_CALLBACK_F(0, "index-version", NULL
, N_("<version>[,<offset>]"),
3488 N_("write the pack index file in the specified idx format version"),
3489 PARSE_OPT_NONEG
, option_parse_index_version
),
3490 OPT_MAGNITUDE(0, "max-pack-size", &pack_size_limit
,
3491 N_("maximum size of each output pack file")),
3492 OPT_BOOL(0, "local", &local
,
3493 N_("ignore borrowed objects from alternate object store")),
3494 OPT_BOOL(0, "incremental", &incremental
,
3495 N_("ignore packed objects")),
3496 OPT_INTEGER(0, "window", &window
,
3497 N_("limit pack window by objects")),
3498 OPT_MAGNITUDE(0, "window-memory", &window_memory_limit
,
3499 N_("limit pack window by memory in addition to object limit")),
3500 OPT_INTEGER(0, "depth", &depth
,
3501 N_("maximum length of delta chain allowed in the resulting pack")),
3502 OPT_BOOL(0, "reuse-delta", &reuse_delta
,
3503 N_("reuse existing deltas")),
3504 OPT_BOOL(0, "reuse-object", &reuse_object
,
3505 N_("reuse existing objects")),
3506 OPT_BOOL(0, "delta-base-offset", &allow_ofs_delta
,
3507 N_("use OFS_DELTA objects")),
3508 OPT_INTEGER(0, "threads", &delta_search_threads
,
3509 N_("use threads when searching for best delta matches")),
3510 OPT_BOOL(0, "non-empty", &non_empty
,
3511 N_("do not create an empty pack output")),
3512 OPT_BOOL(0, "revs", &use_internal_rev_list
,
3513 N_("read revision arguments from standard input")),
3514 OPT_SET_INT_F(0, "unpacked", &rev_list_unpacked
,
3515 N_("limit the objects to those that are not yet packed"),
3516 1, PARSE_OPT_NONEG
),
3517 OPT_SET_INT_F(0, "all", &rev_list_all
,
3518 N_("include objects reachable from any reference"),
3519 1, PARSE_OPT_NONEG
),
3520 OPT_SET_INT_F(0, "reflog", &rev_list_reflog
,
3521 N_("include objects referred by reflog entries"),
3522 1, PARSE_OPT_NONEG
),
3523 OPT_SET_INT_F(0, "indexed-objects", &rev_list_index
,
3524 N_("include objects referred to by the index"),
3525 1, PARSE_OPT_NONEG
),
3526 OPT_BOOL(0, "stdout", &pack_to_stdout
,
3527 N_("output pack to stdout")),
3528 OPT_BOOL(0, "include-tag", &include_tag
,
3529 N_("include tag objects that refer to objects to be packed")),
3530 OPT_BOOL(0, "keep-unreachable", &keep_unreachable
,
3531 N_("keep unreachable objects")),
3532 OPT_BOOL(0, "pack-loose-unreachable", &pack_loose_unreachable
,
3533 N_("pack loose unreachable objects")),
3534 OPT_CALLBACK_F(0, "unpack-unreachable", NULL
, N_("time"),
3535 N_("unpack unreachable objects newer than <time>"),
3536 PARSE_OPT_OPTARG
, option_parse_unpack_unreachable
),
3537 OPT_BOOL(0, "sparse", &sparse
,
3538 N_("use the sparse reachability algorithm")),
3539 OPT_BOOL(0, "thin", &thin
,
3540 N_("create thin packs")),
3541 OPT_BOOL(0, "shallow", &shallow
,
3542 N_("create packs suitable for shallow fetches")),
3543 OPT_BOOL(0, "honor-pack-keep", &ignore_packed_keep_on_disk
,
3544 N_("ignore packs that have companion .keep file")),
3545 OPT_STRING_LIST(0, "keep-pack", &keep_pack_list
, N_("name"),
3546 N_("ignore this pack")),
3547 OPT_INTEGER(0, "compression", &pack_compression_level
,
3548 N_("pack compression level")),
3549 OPT_SET_INT(0, "keep-true-parents", &grafts_replace_parents
,
3550 N_("do not hide commits by grafts"), 0),
3551 OPT_BOOL(0, "use-bitmap-index", &use_bitmap_index
,
3552 N_("use a bitmap index if available to speed up counting objects")),
3553 OPT_SET_INT(0, "write-bitmap-index", &write_bitmap_index
,
3554 N_("write a bitmap index together with the pack index"),
3556 OPT_SET_INT_F(0, "write-bitmap-index-quiet",
3557 &write_bitmap_index
,
3558 N_("write a bitmap index if possible"),
3559 WRITE_BITMAP_QUIET
, PARSE_OPT_HIDDEN
),
3560 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options
),
3561 OPT_CALLBACK_F(0, "missing", NULL
, N_("action"),
3562 N_("handling for missing objects"), PARSE_OPT_NONEG
,
3563 option_parse_missing_action
),
3564 OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects
,
3565 N_("do not pack objects in promisor packfiles")),
3566 OPT_BOOL(0, "delta-islands", &use_delta_islands
,
3567 N_("respect islands during delta compression")),
3568 OPT_STRING_LIST(0, "uri-protocol", &uri_protocols
,
3570 N_("exclude any configured uploadpack.blobpackfileuri with this protocol")),
3574 if (DFS_NUM_STATES
> (1 << OE_DFS_STATE_BITS
))
3575 BUG("too many dfs states, increase OE_DFS_STATE_BITS");
3577 read_replace_refs
= 0;
3579 sparse
= git_env_bool("GIT_TEST_PACK_SPARSE", -1);
3580 prepare_repo_settings(the_repository
);
3582 sparse
= the_repository
->settings
.pack_use_sparse
;
3584 reset_pack_idx_option(&pack_idx_opts
);
3585 git_config(git_pack_config
, NULL
);
3587 progress
= isatty(2);
3588 argc
= parse_options(argc
, argv
, prefix
, pack_objects_options
,
3592 base_name
= argv
[0];
3595 if (pack_to_stdout
!= !base_name
|| argc
)
3596 usage_with_options(pack_usage
, pack_objects_options
);
3598 if (depth
>= (1 << OE_DEPTH_BITS
)) {
3599 warning(_("delta chain depth %d is too deep, forcing %d"),
3600 depth
, (1 << OE_DEPTH_BITS
) - 1);
3601 depth
= (1 << OE_DEPTH_BITS
) - 1;
3603 if (cache_max_small_delta_size
>= (1U << OE_Z_DELTA_BITS
)) {
3604 warning(_("pack.deltaCacheLimit is too high, forcing %d"),
3605 (1U << OE_Z_DELTA_BITS
) - 1);
3606 cache_max_small_delta_size
= (1U << OE_Z_DELTA_BITS
) - 1;
3609 strvec_push(&rp
, "pack-objects");
3611 use_internal_rev_list
= 1;
3612 strvec_push(&rp
, shallow
3613 ? "--objects-edge-aggressive"
3614 : "--objects-edge");
3616 strvec_push(&rp
, "--objects");
3619 use_internal_rev_list
= 1;
3620 strvec_push(&rp
, "--all");
3622 if (rev_list_reflog
) {
3623 use_internal_rev_list
= 1;
3624 strvec_push(&rp
, "--reflog");
3626 if (rev_list_index
) {
3627 use_internal_rev_list
= 1;
3628 strvec_push(&rp
, "--indexed-objects");
3630 if (rev_list_unpacked
) {
3631 use_internal_rev_list
= 1;
3632 strvec_push(&rp
, "--unpacked");
3635 if (exclude_promisor_objects
) {
3636 use_internal_rev_list
= 1;
3637 fetch_if_missing
= 0;
3638 strvec_push(&rp
, "--exclude-promisor-objects");
3640 if (unpack_unreachable
|| keep_unreachable
|| pack_loose_unreachable
)
3641 use_internal_rev_list
= 1;
3645 if (pack_compression_level
== -1)
3646 pack_compression_level
= Z_DEFAULT_COMPRESSION
;
3647 else if (pack_compression_level
< 0 || pack_compression_level
> Z_BEST_COMPRESSION
)
3648 die(_("bad pack compression level %d"), pack_compression_level
);
3650 if (!delta_search_threads
) /* --threads=0 means autodetect */
3651 delta_search_threads
= online_cpus();
3653 if (!HAVE_THREADS
&& delta_search_threads
!= 1)
3654 warning(_("no threads support, ignoring --threads"));
3655 if (!pack_to_stdout
&& !pack_size_limit
)
3656 pack_size_limit
= pack_size_limit_cfg
;
3657 if (pack_to_stdout
&& pack_size_limit
)
3658 die(_("--max-pack-size cannot be used to build a pack for transfer"));
3659 if (pack_size_limit
&& pack_size_limit
< 1024*1024) {
3660 warning(_("minimum pack size limit is 1 MiB"));
3661 pack_size_limit
= 1024*1024;
3664 if (!pack_to_stdout
&& thin
)
3665 die(_("--thin cannot be used to build an indexable pack"));
3667 if (keep_unreachable
&& unpack_unreachable
)
3668 die(_("--keep-unreachable and --unpack-unreachable are incompatible"));
3669 if (!rev_list_all
|| !rev_list_reflog
|| !rev_list_index
)
3670 unpack_unreachable_expiration
= 0;
3672 if (filter_options
.choice
) {
3673 if (!pack_to_stdout
)
3674 die(_("cannot use --filter without --stdout"));
3678 * "soft" reasons not to use bitmaps - for on-disk repack by default we want
3680 * - to produce good pack (with bitmap index not-yet-packed objects are
3681 * packed in suboptimal order).
3683 * - to use more robust pack-generation codepath (avoiding possible
3684 * bugs in bitmap code and possible bitmap index corruption).
3686 if (!pack_to_stdout
)
3687 use_bitmap_index_default
= 0;
3689 if (use_bitmap_index
< 0)
3690 use_bitmap_index
= use_bitmap_index_default
;
3692 /* "hard" reasons not to use bitmaps; these just won't work at all */
3693 if (!use_internal_rev_list
|| (!pack_to_stdout
&& write_bitmap_index
) || is_repository_shallow(the_repository
))
3694 use_bitmap_index
= 0;
3696 if (pack_to_stdout
|| !rev_list_all
)
3697 write_bitmap_index
= 0;
3699 if (use_delta_islands
)
3700 strvec_push(&rp
, "--topo-order");
3702 if (progress
&& all_progress_implied
)
3705 add_extra_kept_packs(&keep_pack_list
);
3706 if (ignore_packed_keep_on_disk
) {
3707 struct packed_git
*p
;
3708 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
)
3709 if (p
->pack_local
&& p
->pack_keep
)
3711 if (!p
) /* no keep-able packs found */
3712 ignore_packed_keep_on_disk
= 0;
3716 * unlike ignore_packed_keep_on_disk above, we do not
3717 * want to unset "local" based on looking at packs, as
3718 * it also covers non-local objects
3720 struct packed_git
*p
;
3721 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
3722 if (!p
->pack_local
) {
3723 have_non_local_packs
= 1;
3729 trace2_region_enter("pack-objects", "enumerate-objects",
3731 prepare_packing_data(the_repository
, &to_pack
);
3734 progress_state
= start_progress(_("Enumerating objects"), 0);
3735 if (!use_internal_rev_list
)
3736 read_object_list_from_stdin();
3738 get_object_list(rp
.nr
, rp
.v
);
3741 cleanup_preferred_base();
3742 if (include_tag
&& nr_result
)
3743 for_each_ref(add_ref_tag
, NULL
);
3744 stop_progress(&progress_state
);
3745 trace2_region_leave("pack-objects", "enumerate-objects",
3748 if (non_empty
&& !nr_result
)
3751 trace2_region_enter("pack-objects", "prepare-pack",
3753 prepare_pack(window
, depth
);
3754 trace2_region_leave("pack-objects", "prepare-pack",
3758 trace2_region_enter("pack-objects", "write-pack-file", the_repository
);
3759 write_excluded_by_configs();
3761 trace2_region_leave("pack-objects", "write-pack-file", the_repository
);
3765 _("Total %"PRIu32
" (delta %"PRIu32
"),"
3766 " reused %"PRIu32
" (delta %"PRIu32
"),"
3767 " pack-reused %"PRIu32
),
3768 written
, written_delta
, reused
, reused_delta
,
3769 reuse_packfile_objects
);