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Commit | Line | Data |
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5d4a6003 | 1 | #include "builtin.h" |
c323ac7d LT |
2 | #include "cache.h" |
3 | #include "object.h" | |
8e440259 PE |
4 | #include "blob.h" |
5 | #include "commit.h" | |
6 | #include "tag.h" | |
7 | #include "tree.h" | |
c323ac7d | 8 | #include "delta.h" |
a733cb60 | 9 | #include "pack.h" |
c38138cd | 10 | #include "csum-file.h" |
1b0c7174 | 11 | #include "tree-walk.h" |
b5d97e6b JH |
12 | #include "diff.h" |
13 | #include "revision.h" | |
14 | #include "list-objects.h" | |
c323ac7d | 15 | |
231f240b NP |
16 | static const char pack_usage[] = "\ |
17 | git-pack-objects [{ -q | --progress | --all-progress }] \n\ | |
18 | [--local] [--incremental] [--window=N] [--depth=N] \n\ | |
19 | [--no-reuse-delta] [--delta-base-offset] [--non-empty] \n\ | |
63049292 | 20 | [--revs [--unpacked | --all]*] [--reflog] [--stdout | base-name] \n\ |
231f240b | 21 | [<ref-list | <object-list]"; |
c323ac7d | 22 | |
c323ac7d LT |
23 | struct object_entry { |
24 | unsigned char sha1[20]; | |
3f9ac8d2 | 25 | unsigned long size; /* uncompressed size */ |
15b4d577 JH |
26 | unsigned long offset; /* offset into the final pack file; |
27 | * nonzero if already written. | |
28 | */ | |
3f9ac8d2 | 29 | unsigned int depth; /* delta depth */ |
15b4d577 | 30 | unsigned int delta_limit; /* base adjustment for in-pack delta */ |
3f9ac8d2 | 31 | unsigned int hash; /* name hint hash */ |
a733cb60 | 32 | enum object_type type; |
ab7cd7bb | 33 | enum object_type in_pack_type; /* could be delta */ |
3f9ac8d2 | 34 | unsigned long delta_size; /* delta data size (uncompressed) */ |
780e6e73 | 35 | #define in_pack_header_size delta_size /* only when reusing pack data */ |
3f9ac8d2 JH |
36 | struct object_entry *delta; /* delta base object */ |
37 | struct packed_git *in_pack; /* already in pack */ | |
3f9ac8d2 | 38 | unsigned int in_pack_offset; |
82e5a82f | 39 | struct object_entry *delta_child; /* deltified objects who bases me */ |
15b4d577 JH |
40 | struct object_entry *delta_sibling; /* other deltified objects who |
41 | * uses the same base as me | |
42 | */ | |
7a979d99 JH |
43 | int preferred_base; /* we do not pack this, but is encouraged to |
44 | * be used as the base objectto delta huge | |
45 | * objects against. | |
46 | */ | |
c323ac7d LT |
47 | }; |
48 | ||
3f9ac8d2 | 49 | /* |
82e5a82f | 50 | * Objects we are going to pack are collected in objects array (dynamically |
3f9ac8d2 JH |
51 | * expanded). nr_objects & nr_alloc controls this array. They are stored |
52 | * in the order we see -- typically rev-list --objects order that gives us | |
53 | * nice "minimum seek" order. | |
54 | * | |
55 | * sorted-by-sha ans sorted-by-type are arrays of pointers that point at | |
56 | * elements in the objects array. The former is used to build the pack | |
57 | * index (lists object names in the ascending order to help offset lookup), | |
58 | * and the latter is used to group similar things together by try_delta() | |
59 | * heuristics. | |
60 | */ | |
61 | ||
5f3de58f | 62 | static unsigned char object_list_sha1[20]; |
96f1e58f DR |
63 | static int non_empty; |
64 | static int no_reuse_delta; | |
65 | static int local; | |
66 | static int incremental; | |
be6b1914 NP |
67 | static int allow_ofs_delta; |
68 | ||
c323ac7d | 69 | static struct object_entry **sorted_by_sha, **sorted_by_type; |
96f1e58f DR |
70 | static struct object_entry *objects; |
71 | static int nr_objects, nr_alloc, nr_result; | |
c323ac7d | 72 | static const char *base_name; |
e1808845 | 73 | static unsigned char pack_file_sha1[20]; |
024701f1 | 74 | static int progress = 1; |
96f1e58f | 75 | static volatile sig_atomic_t progress_update; |
4812a93a | 76 | static int window = 10; |
df6d6101 | 77 | static int pack_to_stdout; |
8d1d8f83 | 78 | static int num_preferred_base; |
c323ac7d | 79 | |
3f9ac8d2 JH |
80 | /* |
81 | * The object names in objects array are hashed with this hashtable, | |
82 | * to help looking up the entry by object name. Binary search from | |
83 | * sorted_by_sha is also possible but this was easier to code and faster. | |
84 | * This hashtable is built after all the objects are seen. | |
85 | */ | |
96f1e58f DR |
86 | static int *object_ix; |
87 | static int object_ix_hashsz; | |
3f9ac8d2 JH |
88 | |
89 | /* | |
90 | * Pack index for existing packs give us easy access to the offsets into | |
91 | * corresponding pack file where each object's data starts, but the entries | |
92 | * do not store the size of the compressed representation (uncompressed | |
780e6e73 NP |
93 | * size is easily available by examining the pack entry header). It is |
94 | * also rather expensive to find the sha1 for an object given its offset. | |
95 | * | |
96 | * We build a hashtable of existing packs (pack_revindex), and keep reverse | |
97 | * index here -- pack index file is sorted by object name mapping to offset; | |
98 | * this pack_revindex[].revindex array is a list of offset/index_nr pairs | |
99 | * ordered by offset, so if you know the offset of an object, next offset | |
100 | * is where its packed representation ends and the index_nr can be used to | |
101 | * get the object sha1 from the main index. | |
3f9ac8d2 | 102 | */ |
780e6e73 NP |
103 | struct revindex_entry { |
104 | unsigned int offset; | |
105 | unsigned int nr; | |
106 | }; | |
3f9ac8d2 JH |
107 | struct pack_revindex { |
108 | struct packed_git *p; | |
780e6e73 NP |
109 | struct revindex_entry *revindex; |
110 | }; | |
111 | static struct pack_revindex *pack_revindex; | |
96f1e58f | 112 | static int pack_revindex_hashsz; |
3f9ac8d2 JH |
113 | |
114 | /* | |
115 | * stats | |
116 | */ | |
96f1e58f DR |
117 | static int written; |
118 | static int written_delta; | |
119 | static int reused; | |
120 | static int reused_delta; | |
3f9ac8d2 JH |
121 | |
122 | static int pack_revindex_ix(struct packed_git *p) | |
123 | { | |
2b74cffa | 124 | unsigned long ui = (unsigned long)p; |
3f9ac8d2 JH |
125 | int i; |
126 | ||
127 | ui = ui ^ (ui >> 16); /* defeat structure alignment */ | |
128 | i = (int)(ui % pack_revindex_hashsz); | |
129 | while (pack_revindex[i].p) { | |
130 | if (pack_revindex[i].p == p) | |
131 | return i; | |
132 | if (++i == pack_revindex_hashsz) | |
133 | i = 0; | |
134 | } | |
135 | return -1 - i; | |
136 | } | |
137 | ||
138 | static void prepare_pack_ix(void) | |
139 | { | |
140 | int num; | |
141 | struct packed_git *p; | |
142 | for (num = 0, p = packed_git; p; p = p->next) | |
143 | num++; | |
144 | if (!num) | |
145 | return; | |
146 | pack_revindex_hashsz = num * 11; | |
147 | pack_revindex = xcalloc(sizeof(*pack_revindex), pack_revindex_hashsz); | |
148 | for (p = packed_git; p; p = p->next) { | |
149 | num = pack_revindex_ix(p); | |
150 | num = - 1 - num; | |
151 | pack_revindex[num].p = p; | |
152 | } | |
153 | /* revindex elements are lazily initialized */ | |
154 | } | |
155 | ||
156 | static int cmp_offset(const void *a_, const void *b_) | |
157 | { | |
780e6e73 NP |
158 | const struct revindex_entry *a = a_; |
159 | const struct revindex_entry *b = b_; | |
160 | return (a->offset < b->offset) ? -1 : (a->offset > b->offset) ? 1 : 0; | |
3f9ac8d2 JH |
161 | } |
162 | ||
163 | /* | |
164 | * Ordered list of offsets of objects in the pack. | |
165 | */ | |
166 | static void prepare_pack_revindex(struct pack_revindex *rix) | |
167 | { | |
168 | struct packed_git *p = rix->p; | |
169 | int num_ent = num_packed_objects(p); | |
170 | int i; | |
171 | void *index = p->index_base + 256; | |
172 | ||
780e6e73 | 173 | rix->revindex = xmalloc(sizeof(*rix->revindex) * (num_ent + 1)); |
3f9ac8d2 | 174 | for (i = 0; i < num_ent; i++) { |
1d7f171c | 175 | unsigned int hl = *((unsigned int *)((char *) index + 24*i)); |
780e6e73 NP |
176 | rix->revindex[i].offset = ntohl(hl); |
177 | rix->revindex[i].nr = i; | |
3f9ac8d2 JH |
178 | } |
179 | /* This knows the pack format -- the 20-byte trailer | |
180 | * follows immediately after the last object data. | |
181 | */ | |
780e6e73 NP |
182 | rix->revindex[num_ent].offset = p->pack_size - 20; |
183 | rix->revindex[num_ent].nr = -1; | |
184 | qsort(rix->revindex, num_ent, sizeof(*rix->revindex), cmp_offset); | |
3f9ac8d2 JH |
185 | } |
186 | ||
780e6e73 NP |
187 | static struct revindex_entry * find_packed_object(struct packed_git *p, |
188 | unsigned int ofs) | |
3f9ac8d2 JH |
189 | { |
190 | int num; | |
191 | int lo, hi; | |
192 | struct pack_revindex *rix; | |
780e6e73 | 193 | struct revindex_entry *revindex; |
3f9ac8d2 JH |
194 | num = pack_revindex_ix(p); |
195 | if (num < 0) | |
196 | die("internal error: pack revindex uninitialized"); | |
197 | rix = &pack_revindex[num]; | |
198 | if (!rix->revindex) | |
199 | prepare_pack_revindex(rix); | |
200 | revindex = rix->revindex; | |
201 | lo = 0; | |
202 | hi = num_packed_objects(p) + 1; | |
203 | do { | |
204 | int mi = (lo + hi) / 2; | |
780e6e73 NP |
205 | if (revindex[mi].offset == ofs) { |
206 | return revindex + mi; | |
3f9ac8d2 | 207 | } |
780e6e73 | 208 | else if (ofs < revindex[mi].offset) |
3f9ac8d2 JH |
209 | hi = mi; |
210 | else | |
211 | lo = mi + 1; | |
212 | } while (lo < hi); | |
213 | die("internal error: pack revindex corrupt"); | |
214 | } | |
215 | ||
780e6e73 NP |
216 | static unsigned long find_packed_object_size(struct packed_git *p, |
217 | unsigned long ofs) | |
218 | { | |
219 | struct revindex_entry *entry = find_packed_object(p, ofs); | |
220 | return entry[1].offset - ofs; | |
221 | } | |
222 | ||
223 | static unsigned char *find_packed_object_name(struct packed_git *p, | |
224 | unsigned long ofs) | |
225 | { | |
226 | struct revindex_entry *entry = find_packed_object(p, ofs); | |
227 | return (unsigned char *)(p->index_base + 256) + 24 * entry->nr + 4; | |
228 | } | |
229 | ||
c323ac7d LT |
230 | static void *delta_against(void *buf, unsigned long size, struct object_entry *entry) |
231 | { | |
232 | unsigned long othersize, delta_size; | |
233 | char type[10]; | |
234 | void *otherbuf = read_sha1_file(entry->delta->sha1, type, &othersize); | |
235 | void *delta_buf; | |
236 | ||
237 | if (!otherbuf) | |
238 | die("unable to read %s", sha1_to_hex(entry->delta->sha1)); | |
8ee378a0 | 239 | delta_buf = diff_delta(otherbuf, othersize, |
dcde55bc | 240 | buf, size, &delta_size, 0); |
75c42d8c | 241 | if (!delta_buf || delta_size != entry->delta_size) |
c323ac7d LT |
242 | die("delta size changed"); |
243 | free(buf); | |
244 | free(otherbuf); | |
245 | return delta_buf; | |
246 | } | |
247 | ||
a733cb60 LT |
248 | /* |
249 | * The per-object header is a pretty dense thing, which is | |
250 | * - first byte: low four bits are "size", then three bits of "type", | |
251 | * and the high bit is "size continues". | |
252 | * - each byte afterwards: low seven bits are size continuation, | |
253 | * with the high bit being "size continues" | |
254 | */ | |
255 | static int encode_header(enum object_type type, unsigned long size, unsigned char *hdr) | |
256 | { | |
01247d87 | 257 | int n = 1; |
a733cb60 LT |
258 | unsigned char c; |
259 | ||
eb32d236 | 260 | if (type < OBJ_COMMIT || type > OBJ_REF_DELTA) |
a733cb60 LT |
261 | die("bad type %d", type); |
262 | ||
01247d87 LT |
263 | c = (type << 4) | (size & 15); |
264 | size >>= 4; | |
265 | while (size) { | |
a733cb60 | 266 | *hdr++ = c | 0x80; |
01247d87 LT |
267 | c = size & 0x7f; |
268 | size >>= 7; | |
269 | n++; | |
a733cb60 LT |
270 | } |
271 | *hdr = c; | |
272 | return n; | |
273 | } | |
274 | ||
780e6e73 NP |
275 | /* |
276 | * we are going to reuse the existing object data as is. make | |
277 | * sure it is not corrupt. | |
278 | */ | |
079afb18 SP |
279 | static int check_pack_inflate(struct packed_git *p, |
280 | struct pack_window **w_curs, | |
281 | unsigned long offset, | |
282 | unsigned long len, | |
283 | unsigned long expect) | |
284 | { | |
285 | z_stream stream; | |
286 | unsigned char fakebuf[4096], *in; | |
287 | int st; | |
288 | ||
289 | memset(&stream, 0, sizeof(stream)); | |
290 | inflateInit(&stream); | |
291 | do { | |
292 | in = use_pack(p, w_curs, offset, &stream.avail_in); | |
293 | stream.next_in = in; | |
294 | stream.next_out = fakebuf; | |
295 | stream.avail_out = sizeof(fakebuf); | |
296 | st = inflate(&stream, Z_FINISH); | |
297 | offset += stream.next_in - in; | |
298 | } while (st == Z_OK || st == Z_BUF_ERROR); | |
299 | inflateEnd(&stream); | |
300 | return (st == Z_STREAM_END && | |
301 | stream.total_out == expect && | |
302 | stream.total_in == len) ? 0 : -1; | |
303 | } | |
304 | ||
305 | static void copy_pack_data(struct sha1file *f, | |
306 | struct packed_git *p, | |
307 | struct pack_window **w_curs, | |
308 | unsigned long offset, | |
309 | unsigned long len) | |
310 | { | |
311 | unsigned char *in; | |
312 | unsigned int avail; | |
313 | ||
314 | while (len) { | |
315 | in = use_pack(p, w_curs, offset, &avail); | |
316 | if (avail > len) | |
317 | avail = len; | |
318 | sha1write(f, in, avail); | |
319 | offset += avail; | |
320 | len -= avail; | |
321 | } | |
322 | } | |
323 | ||
324 | static int check_loose_inflate(unsigned char *data, unsigned long len, unsigned long expect) | |
df6d6101 | 325 | { |
72518e9c JH |
326 | z_stream stream; |
327 | unsigned char fakebuf[4096]; | |
328 | int st; | |
329 | ||
330 | memset(&stream, 0, sizeof(stream)); | |
331 | stream.next_in = data; | |
332 | stream.avail_in = len; | |
333 | stream.next_out = fakebuf; | |
334 | stream.avail_out = sizeof(fakebuf); | |
335 | inflateInit(&stream); | |
336 | ||
337 | while (1) { | |
338 | st = inflate(&stream, Z_FINISH); | |
339 | if (st == Z_STREAM_END || st == Z_OK) { | |
340 | st = (stream.total_out == expect && | |
341 | stream.total_in == len) ? 0 : -1; | |
342 | break; | |
343 | } | |
344 | if (st != Z_BUF_ERROR) { | |
345 | st = -1; | |
346 | break; | |
347 | } | |
348 | stream.next_out = fakebuf; | |
349 | stream.avail_out = sizeof(fakebuf); | |
350 | } | |
351 | inflateEnd(&stream); | |
352 | return st; | |
df6d6101 JH |
353 | } |
354 | ||
df6d6101 JH |
355 | static int revalidate_loose_object(struct object_entry *entry, |
356 | unsigned char *map, | |
357 | unsigned long mapsize) | |
358 | { | |
359 | /* we already know this is a loose object with new type header. */ | |
72518e9c JH |
360 | enum object_type type; |
361 | unsigned long size, used; | |
df6d6101 JH |
362 | |
363 | if (pack_to_stdout) | |
364 | return 0; | |
365 | ||
72518e9c JH |
366 | used = unpack_object_header_gently(map, mapsize, &type, &size); |
367 | if (!used) | |
368 | return -1; | |
369 | map += used; | |
370 | mapsize -= used; | |
079afb18 | 371 | return check_loose_inflate(map, mapsize, size); |
df6d6101 JH |
372 | } |
373 | ||
7a979d99 JH |
374 | static unsigned long write_object(struct sha1file *f, |
375 | struct object_entry *entry) | |
c323ac7d LT |
376 | { |
377 | unsigned long size; | |
378 | char type[10]; | |
3f9ac8d2 | 379 | void *buf; |
a733cb60 | 380 | unsigned char header[10]; |
c323ac7d | 381 | unsigned hdrlen, datalen; |
a733cb60 | 382 | enum object_type obj_type; |
ab7cd7bb | 383 | int to_reuse = 0; |
c323ac7d | 384 | |
a733cb60 | 385 | obj_type = entry->type; |
ab7cd7bb JH |
386 | if (! entry->in_pack) |
387 | to_reuse = 0; /* can't reuse what we don't have */ | |
780e6e73 | 388 | else if (obj_type == OBJ_REF_DELTA || obj_type == OBJ_OFS_DELTA) |
ab7cd7bb JH |
389 | to_reuse = 1; /* check_object() decided it for us */ |
390 | else if (obj_type != entry->in_pack_type) | |
391 | to_reuse = 0; /* pack has delta which is unusable */ | |
392 | else if (entry->delta) | |
393 | to_reuse = 0; /* we want to pack afresh */ | |
394 | else | |
395 | to_reuse = 1; /* we have it in-pack undeltified, | |
396 | * and we do not need to deltify it. | |
397 | */ | |
398 | ||
ceec1361 JH |
399 | if (!entry->in_pack && !entry->delta) { |
400 | unsigned char *map; | |
401 | unsigned long mapsize; | |
402 | map = map_sha1_file(entry->sha1, &mapsize); | |
403 | if (map && !legacy_loose_object(map)) { | |
404 | /* We can copy straight into the pack file */ | |
df6d6101 JH |
405 | if (revalidate_loose_object(entry, map, mapsize)) |
406 | die("corrupt loose object %s", | |
407 | sha1_to_hex(entry->sha1)); | |
ceec1361 JH |
408 | sha1write(f, map, mapsize); |
409 | munmap(map, mapsize); | |
410 | written++; | |
411 | reused++; | |
412 | return mapsize; | |
413 | } | |
414 | if (map) | |
415 | munmap(map, mapsize); | |
416 | } | |
417 | ||
df6d6101 | 418 | if (!to_reuse) { |
3f9ac8d2 JH |
419 | buf = read_sha1_file(entry->sha1, type, &size); |
420 | if (!buf) | |
421 | die("unable to read %s", sha1_to_hex(entry->sha1)); | |
422 | if (size != entry->size) | |
423 | die("object %s size inconsistency (%lu vs %lu)", | |
424 | sha1_to_hex(entry->sha1), size, entry->size); | |
425 | if (entry->delta) { | |
426 | buf = delta_against(buf, size, entry); | |
427 | size = entry->delta_size; | |
be6b1914 NP |
428 | obj_type = (allow_ofs_delta && entry->delta->offset) ? |
429 | OBJ_OFS_DELTA : OBJ_REF_DELTA; | |
3f9ac8d2 JH |
430 | } |
431 | /* | |
432 | * The object header is a byte of 'type' followed by zero or | |
be6b1914 | 433 | * more bytes of length. |
3f9ac8d2 JH |
434 | */ |
435 | hdrlen = encode_header(obj_type, size, header); | |
436 | sha1write(f, header, hdrlen); | |
437 | ||
be6b1914 NP |
438 | if (obj_type == OBJ_OFS_DELTA) { |
439 | /* | |
440 | * Deltas with relative base contain an additional | |
441 | * encoding of the relative offset for the delta | |
442 | * base from this object's position in the pack. | |
443 | */ | |
444 | unsigned long ofs = entry->offset - entry->delta->offset; | |
445 | unsigned pos = sizeof(header) - 1; | |
446 | header[pos] = ofs & 127; | |
447 | while (ofs >>= 7) | |
448 | header[--pos] = 128 | (--ofs & 127); | |
449 | sha1write(f, header + pos, sizeof(header) - pos); | |
450 | hdrlen += sizeof(header) - pos; | |
451 | } else if (obj_type == OBJ_REF_DELTA) { | |
452 | /* | |
453 | * Deltas with a base reference contain | |
454 | * an additional 20 bytes for the base sha1. | |
455 | */ | |
456 | sha1write(f, entry->delta->sha1, 20); | |
3f9ac8d2 JH |
457 | hdrlen += 20; |
458 | } | |
459 | datalen = sha1write_compressed(f, buf, size); | |
460 | free(buf); | |
c323ac7d | 461 | } |
3f9ac8d2 JH |
462 | else { |
463 | struct packed_git *p = entry->in_pack; | |
03e79c88 | 464 | struct pack_window *w_curs = NULL; |
079afb18 | 465 | unsigned long offset; |
3f9ac8d2 | 466 | |
780e6e73 NP |
467 | if (entry->delta) { |
468 | obj_type = (allow_ofs_delta && entry->delta->offset) ? | |
469 | OBJ_OFS_DELTA : OBJ_REF_DELTA; | |
470 | reused_delta++; | |
471 | } | |
472 | hdrlen = encode_header(obj_type, entry->size, header); | |
473 | sha1write(f, header, hdrlen); | |
474 | if (obj_type == OBJ_OFS_DELTA) { | |
475 | unsigned long ofs = entry->offset - entry->delta->offset; | |
476 | unsigned pos = sizeof(header) - 1; | |
477 | header[pos] = ofs & 127; | |
478 | while (ofs >>= 7) | |
479 | header[--pos] = 128 | (--ofs & 127); | |
480 | sha1write(f, header + pos, sizeof(header) - pos); | |
481 | hdrlen += sizeof(header) - pos; | |
482 | } else if (obj_type == OBJ_REF_DELTA) { | |
483 | sha1write(f, entry->delta->sha1, 20); | |
484 | hdrlen += 20; | |
485 | } | |
df6d6101 | 486 | |
079afb18 | 487 | offset = entry->in_pack_offset + entry->in_pack_header_size; |
780e6e73 NP |
488 | datalen = find_packed_object_size(p, entry->in_pack_offset) |
489 | - entry->in_pack_header_size; | |
079afb18 SP |
490 | if (!pack_to_stdout && check_pack_inflate(p, &w_curs, |
491 | offset, datalen, entry->size)) | |
df6d6101 | 492 | die("corrupt delta in pack %s", sha1_to_hex(entry->sha1)); |
079afb18 | 493 | copy_pack_data(f, p, &w_curs, offset, datalen); |
03e79c88 | 494 | unuse_pack(&w_curs); |
3f9ac8d2 | 495 | reused++; |
a733cb60 | 496 | } |
be6b1914 | 497 | if (entry->delta) |
ab7cd7bb | 498 | written_delta++; |
3f9ac8d2 | 499 | written++; |
c323ac7d LT |
500 | return hdrlen + datalen; |
501 | } | |
502 | ||
9d5ab962 JH |
503 | static unsigned long write_one(struct sha1file *f, |
504 | struct object_entry *e, | |
505 | unsigned long offset) | |
506 | { | |
be6b1914 | 507 | if (e->offset || e->preferred_base) |
9d5ab962 JH |
508 | /* offset starts from header size and cannot be zero |
509 | * if it is written already. | |
510 | */ | |
511 | return offset; | |
be6b1914 | 512 | /* if we are deltified, write out its base object first. */ |
9d5ab962 JH |
513 | if (e->delta) |
514 | offset = write_one(f, e->delta, offset); | |
be6b1914 NP |
515 | e->offset = offset; |
516 | return offset + write_object(f, e); | |
9d5ab962 JH |
517 | } |
518 | ||
c323ac7d LT |
519 | static void write_pack_file(void) |
520 | { | |
521 | int i; | |
d22b9290 | 522 | struct sha1file *f; |
a733cb60 | 523 | unsigned long offset; |
a733cb60 | 524 | struct pack_header hdr; |
183bdb2c | 525 | unsigned last_percent = 999; |
fa438a2e | 526 | int do_progress = progress; |
c323ac7d | 527 | |
fa438a2e | 528 | if (!base_name) { |
d22b9290 | 529 | f = sha1fd(1, "<stdout>"); |
fa438a2e NP |
530 | do_progress >>= 1; |
531 | } | |
532 | else | |
183bdb2c JH |
533 | f = sha1create("%s-%s.%s", base_name, |
534 | sha1_to_hex(object_list_sha1), "pack"); | |
183bdb2c | 535 | if (do_progress) |
f0b0af1b | 536 | fprintf(stderr, "Writing %d objects.\n", nr_result); |
183bdb2c | 537 | |
a733cb60 | 538 | hdr.hdr_signature = htonl(PACK_SIGNATURE); |
01247d87 | 539 | hdr.hdr_version = htonl(PACK_VERSION); |
7a979d99 | 540 | hdr.hdr_entries = htonl(nr_result); |
a733cb60 LT |
541 | sha1write(f, &hdr, sizeof(hdr)); |
542 | offset = sizeof(hdr); | |
f0b0af1b JH |
543 | if (!nr_result) |
544 | goto done; | |
5e8dc750 | 545 | for (i = 0; i < nr_objects; i++) { |
9d5ab962 | 546 | offset = write_one(f, objects + i, offset); |
183bdb2c | 547 | if (do_progress) { |
f0b0af1b | 548 | unsigned percent = written * 100 / nr_result; |
183bdb2c JH |
549 | if (progress_update || percent != last_percent) { |
550 | fprintf(stderr, "%4u%% (%u/%u) done\r", | |
f0b0af1b | 551 | percent, written, nr_result); |
183bdb2c JH |
552 | progress_update = 0; |
553 | last_percent = percent; | |
554 | } | |
5e8dc750 NP |
555 | } |
556 | } | |
183bdb2c JH |
557 | if (do_progress) |
558 | fputc('\n', stderr); | |
f0b0af1b | 559 | done: |
67c08ce1 NP |
560 | if (written != nr_result) |
561 | die("wrote %d objects while expecting %d", written, nr_result); | |
e1808845 | 562 | sha1close(f, pack_file_sha1, 1); |
c323ac7d LT |
563 | } |
564 | ||
565 | static void write_index_file(void) | |
566 | { | |
567 | int i; | |
7a979d99 JH |
568 | struct sha1file *f = sha1create("%s-%s.%s", base_name, |
569 | sha1_to_hex(object_list_sha1), "idx"); | |
c323ac7d | 570 | struct object_entry **list = sorted_by_sha; |
7a979d99 | 571 | struct object_entry **last = list + nr_result; |
b18b00a6 | 572 | uint32_t array[256]; |
c323ac7d LT |
573 | |
574 | /* | |
575 | * Write the first-level table (the list is sorted, | |
576 | * but we use a 256-entry lookup to be able to avoid | |
e1808845 | 577 | * having to do eight extra binary search iterations). |
c323ac7d LT |
578 | */ |
579 | for (i = 0; i < 256; i++) { | |
580 | struct object_entry **next = list; | |
581 | while (next < last) { | |
582 | struct object_entry *entry = *next; | |
583 | if (entry->sha1[0] != i) | |
584 | break; | |
585 | next++; | |
586 | } | |
587 | array[i] = htonl(next - sorted_by_sha); | |
588 | list = next; | |
589 | } | |
b18b00a6 | 590 | sha1write(f, array, 256 * 4); |
c323ac7d LT |
591 | |
592 | /* | |
593 | * Write the actual SHA1 entries.. | |
594 | */ | |
595 | list = sorted_by_sha; | |
7a979d99 | 596 | for (i = 0; i < nr_result; i++) { |
c323ac7d | 597 | struct object_entry *entry = *list++; |
b18b00a6 | 598 | uint32_t offset = htonl(entry->offset); |
c38138cd LT |
599 | sha1write(f, &offset, 4); |
600 | sha1write(f, entry->sha1, 20); | |
c323ac7d | 601 | } |
e1808845 LT |
602 | sha1write(f, pack_file_sha1, 20); |
603 | sha1close(f, NULL, 1); | |
c323ac7d LT |
604 | } |
605 | ||
7a979d99 JH |
606 | static int locate_object_entry_hash(const unsigned char *sha1) |
607 | { | |
608 | int i; | |
609 | unsigned int ui; | |
610 | memcpy(&ui, sha1, sizeof(unsigned int)); | |
611 | i = ui % object_ix_hashsz; | |
612 | while (0 < object_ix[i]) { | |
a89fccd2 | 613 | if (!hashcmp(sha1, objects[object_ix[i] - 1].sha1)) |
7a979d99 JH |
614 | return i; |
615 | if (++i == object_ix_hashsz) | |
616 | i = 0; | |
617 | } | |
618 | return -1 - i; | |
619 | } | |
620 | ||
621 | static struct object_entry *locate_object_entry(const unsigned char *sha1) | |
622 | { | |
623 | int i; | |
624 | ||
625 | if (!object_ix_hashsz) | |
626 | return NULL; | |
627 | ||
628 | i = locate_object_entry_hash(sha1); | |
629 | if (0 <= i) | |
630 | return &objects[object_ix[i]-1]; | |
631 | return NULL; | |
632 | } | |
633 | ||
634 | static void rehash_objects(void) | |
c323ac7d | 635 | { |
7a979d99 JH |
636 | int i; |
637 | struct object_entry *oe; | |
638 | ||
639 | object_ix_hashsz = nr_objects * 3; | |
640 | if (object_ix_hashsz < 1024) | |
641 | object_ix_hashsz = 1024; | |
642 | object_ix = xrealloc(object_ix, sizeof(int) * object_ix_hashsz); | |
5379a5c5 | 643 | memset(object_ix, 0, sizeof(int) * object_ix_hashsz); |
7a979d99 JH |
644 | for (i = 0, oe = objects; i < nr_objects; i++, oe++) { |
645 | int ix = locate_object_entry_hash(oe->sha1); | |
646 | if (0 <= ix) | |
647 | continue; | |
648 | ix = -1 - ix; | |
649 | object_ix[ix] = i + 1; | |
650 | } | |
651 | } | |
652 | ||
ce0bd642 | 653 | static unsigned name_hash(const char *name) |
1d6b38cc | 654 | { |
ce0bd642 LT |
655 | unsigned char c; |
656 | unsigned hash = 0; | |
657 | ||
eeef7135 | 658 | /* |
ce0bd642 LT |
659 | * This effectively just creates a sortable number from the |
660 | * last sixteen non-whitespace characters. Last characters | |
661 | * count "most", so things that end in ".c" sort together. | |
eeef7135 | 662 | */ |
ce0bd642 LT |
663 | while ((c = *name++) != 0) { |
664 | if (isspace(c)) | |
665 | continue; | |
666 | hash = (hash >> 2) + (c << 24); | |
667 | } | |
1d6b38cc JH |
668 | return hash; |
669 | } | |
670 | ||
671 | static int add_object_entry(const unsigned char *sha1, unsigned hash, int exclude) | |
c323ac7d LT |
672 | { |
673 | unsigned int idx = nr_objects; | |
674 | struct object_entry *entry; | |
3f9ac8d2 | 675 | struct packed_git *p; |
ab7cd7bb JH |
676 | unsigned int found_offset = 0; |
677 | struct packed_git *found_pack = NULL; | |
b925410d | 678 | int ix, status = 0; |
c323ac7d | 679 | |
7a979d99 | 680 | if (!exclude) { |
64560374 | 681 | for (p = packed_git; p; p = p->next) { |
43057304 NP |
682 | unsigned long offset = find_pack_entry_one(sha1, p); |
683 | if (offset) { | |
64560374 LT |
684 | if (incremental) |
685 | return 0; | |
686 | if (local && !p->pack_local) | |
687 | return 0; | |
7a979d99 | 688 | if (!found_pack) { |
43057304 NP |
689 | found_offset = offset; |
690 | found_pack = p; | |
7a979d99 | 691 | } |
64560374 LT |
692 | } |
693 | } | |
694 | } | |
7a979d99 JH |
695 | if ((entry = locate_object_entry(sha1)) != NULL) |
696 | goto already_added; | |
eb019375 | 697 | |
c323ac7d LT |
698 | if (idx >= nr_alloc) { |
699 | unsigned int needed = (idx + 1024) * 3 / 2; | |
700 | objects = xrealloc(objects, needed * sizeof(*entry)); | |
701 | nr_alloc = needed; | |
702 | } | |
703 | entry = objects + idx; | |
7a979d99 | 704 | nr_objects = idx + 1; |
c323ac7d | 705 | memset(entry, 0, sizeof(*entry)); |
e702496e | 706 | hashcpy(entry->sha1, sha1); |
27225f2e | 707 | entry->hash = hash; |
7a979d99 JH |
708 | |
709 | if (object_ix_hashsz * 3 <= nr_objects * 4) | |
710 | rehash_objects(); | |
711 | else { | |
712 | ix = locate_object_entry_hash(entry->sha1); | |
713 | if (0 <= ix) | |
714 | die("internal error in object hashing."); | |
715 | object_ix[-1 - ix] = idx + 1; | |
3f9ac8d2 | 716 | } |
b925410d | 717 | status = 1; |
7a979d99 JH |
718 | |
719 | already_added: | |
f0b0af1b JH |
720 | if (progress_update) { |
721 | fprintf(stderr, "Counting objects...%d\r", nr_objects); | |
722 | progress_update = 0; | |
723 | } | |
7a979d99 JH |
724 | if (exclude) |
725 | entry->preferred_base = 1; | |
726 | else { | |
727 | if (found_pack) { | |
728 | entry->in_pack = found_pack; | |
729 | entry->in_pack_offset = found_offset; | |
730 | } | |
a49dd05f | 731 | } |
b925410d | 732 | return status; |
c323ac7d LT |
733 | } |
734 | ||
5379a5c5 JH |
735 | struct pbase_tree_cache { |
736 | unsigned char sha1[20]; | |
737 | int ref; | |
738 | int temporary; | |
739 | void *tree_data; | |
740 | unsigned long tree_size; | |
741 | }; | |
742 | ||
743 | static struct pbase_tree_cache *(pbase_tree_cache[256]); | |
744 | static int pbase_tree_cache_ix(const unsigned char *sha1) | |
745 | { | |
746 | return sha1[0] % ARRAY_SIZE(pbase_tree_cache); | |
747 | } | |
748 | static int pbase_tree_cache_ix_incr(int ix) | |
749 | { | |
750 | return (ix+1) % ARRAY_SIZE(pbase_tree_cache); | |
751 | } | |
752 | ||
753 | static struct pbase_tree { | |
754 | struct pbase_tree *next; | |
755 | /* This is a phony "cache" entry; we are not | |
756 | * going to evict it nor find it through _get() | |
757 | * mechanism -- this is for the toplevel node that | |
758 | * would almost always change with any commit. | |
759 | */ | |
760 | struct pbase_tree_cache pcache; | |
761 | } *pbase_tree; | |
762 | ||
763 | static struct pbase_tree_cache *pbase_tree_get(const unsigned char *sha1) | |
764 | { | |
765 | struct pbase_tree_cache *ent, *nent; | |
766 | void *data; | |
767 | unsigned long size; | |
768 | char type[20]; | |
769 | int neigh; | |
770 | int my_ix = pbase_tree_cache_ix(sha1); | |
771 | int available_ix = -1; | |
772 | ||
773 | /* pbase-tree-cache acts as a limited hashtable. | |
774 | * your object will be found at your index or within a few | |
775 | * slots after that slot if it is cached. | |
776 | */ | |
777 | for (neigh = 0; neigh < 8; neigh++) { | |
778 | ent = pbase_tree_cache[my_ix]; | |
a89fccd2 | 779 | if (ent && !hashcmp(ent->sha1, sha1)) { |
5379a5c5 JH |
780 | ent->ref++; |
781 | return ent; | |
782 | } | |
783 | else if (((available_ix < 0) && (!ent || !ent->ref)) || | |
784 | ((0 <= available_ix) && | |
785 | (!ent && pbase_tree_cache[available_ix]))) | |
786 | available_ix = my_ix; | |
787 | if (!ent) | |
788 | break; | |
789 | my_ix = pbase_tree_cache_ix_incr(my_ix); | |
790 | } | |
791 | ||
792 | /* Did not find one. Either we got a bogus request or | |
793 | * we need to read and perhaps cache. | |
794 | */ | |
795 | data = read_sha1_file(sha1, type, &size); | |
796 | if (!data) | |
797 | return NULL; | |
798 | if (strcmp(type, tree_type)) { | |
799 | free(data); | |
800 | return NULL; | |
801 | } | |
802 | ||
803 | /* We need to either cache or return a throwaway copy */ | |
804 | ||
805 | if (available_ix < 0) | |
806 | ent = NULL; | |
807 | else { | |
808 | ent = pbase_tree_cache[available_ix]; | |
809 | my_ix = available_ix; | |
810 | } | |
811 | ||
812 | if (!ent) { | |
813 | nent = xmalloc(sizeof(*nent)); | |
814 | nent->temporary = (available_ix < 0); | |
815 | } | |
816 | else { | |
817 | /* evict and reuse */ | |
818 | free(ent->tree_data); | |
819 | nent = ent; | |
820 | } | |
e702496e | 821 | hashcpy(nent->sha1, sha1); |
5379a5c5 JH |
822 | nent->tree_data = data; |
823 | nent->tree_size = size; | |
824 | nent->ref = 1; | |
825 | if (!nent->temporary) | |
826 | pbase_tree_cache[my_ix] = nent; | |
827 | return nent; | |
828 | } | |
829 | ||
830 | static void pbase_tree_put(struct pbase_tree_cache *cache) | |
831 | { | |
832 | if (!cache->temporary) { | |
833 | cache->ref--; | |
834 | return; | |
835 | } | |
836 | free(cache->tree_data); | |
837 | free(cache); | |
838 | } | |
839 | ||
840 | static int name_cmp_len(const char *name) | |
841 | { | |
842 | int i; | |
843 | for (i = 0; name[i] && name[i] != '\n' && name[i] != '/'; i++) | |
844 | ; | |
845 | return i; | |
846 | } | |
847 | ||
848 | static void add_pbase_object(struct tree_desc *tree, | |
5379a5c5 | 849 | const char *name, |
ce0bd642 LT |
850 | int cmplen, |
851 | const char *fullname) | |
3f9ac8d2 | 852 | { |
4c068a98 LT |
853 | struct name_entry entry; |
854 | ||
855 | while (tree_entry(tree,&entry)) { | |
7a979d99 JH |
856 | unsigned long size; |
857 | char type[20]; | |
858 | ||
4c068a98 LT |
859 | if (entry.pathlen != cmplen || |
860 | memcmp(entry.path, name, cmplen) || | |
861 | !has_sha1_file(entry.sha1) || | |
862 | sha1_object_info(entry.sha1, type, &size)) | |
7a979d99 | 863 | continue; |
5379a5c5 | 864 | if (name[cmplen] != '/') { |
ce0bd642 | 865 | unsigned hash = name_hash(fullname); |
4c068a98 | 866 | add_object_entry(entry.sha1, hash, 1); |
5379a5c5 JH |
867 | return; |
868 | } | |
8e440259 | 869 | if (!strcmp(type, tree_type)) { |
7a979d99 | 870 | struct tree_desc sub; |
5379a5c5 JH |
871 | struct pbase_tree_cache *tree; |
872 | const char *down = name+cmplen+1; | |
873 | int downlen = name_cmp_len(down); | |
874 | ||
4c068a98 | 875 | tree = pbase_tree_get(entry.sha1); |
5379a5c5 JH |
876 | if (!tree) |
877 | return; | |
878 | sub.buf = tree->tree_data; | |
879 | sub.size = tree->tree_size; | |
880 | ||
ce0bd642 | 881 | add_pbase_object(&sub, down, downlen, fullname); |
5379a5c5 JH |
882 | pbase_tree_put(tree); |
883 | } | |
884 | } | |
885 | } | |
1d6b38cc | 886 | |
5379a5c5 JH |
887 | static unsigned *done_pbase_paths; |
888 | static int done_pbase_paths_num; | |
889 | static int done_pbase_paths_alloc; | |
890 | static int done_pbase_path_pos(unsigned hash) | |
891 | { | |
892 | int lo = 0; | |
893 | int hi = done_pbase_paths_num; | |
894 | while (lo < hi) { | |
895 | int mi = (hi + lo) / 2; | |
896 | if (done_pbase_paths[mi] == hash) | |
897 | return mi; | |
898 | if (done_pbase_paths[mi] < hash) | |
899 | hi = mi; | |
900 | else | |
901 | lo = mi + 1; | |
902 | } | |
903 | return -lo-1; | |
904 | } | |
905 | ||
906 | static int check_pbase_path(unsigned hash) | |
907 | { | |
908 | int pos = (!done_pbase_paths) ? -1 : done_pbase_path_pos(hash); | |
909 | if (0 <= pos) | |
910 | return 1; | |
911 | pos = -pos - 1; | |
912 | if (done_pbase_paths_alloc <= done_pbase_paths_num) { | |
913 | done_pbase_paths_alloc = alloc_nr(done_pbase_paths_alloc); | |
914 | done_pbase_paths = xrealloc(done_pbase_paths, | |
915 | done_pbase_paths_alloc * | |
916 | sizeof(unsigned)); | |
917 | } | |
918 | done_pbase_paths_num++; | |
919 | if (pos < done_pbase_paths_num) | |
920 | memmove(done_pbase_paths + pos + 1, | |
921 | done_pbase_paths + pos, | |
922 | (done_pbase_paths_num - pos - 1) * sizeof(unsigned)); | |
923 | done_pbase_paths[pos] = hash; | |
924 | return 0; | |
925 | } | |
926 | ||
8d1d8f83 | 927 | static void add_preferred_base_object(const char *name, unsigned hash) |
5379a5c5 JH |
928 | { |
929 | struct pbase_tree *it; | |
930 | int cmplen = name_cmp_len(name); | |
931 | ||
932 | if (check_pbase_path(hash)) | |
933 | return; | |
934 | ||
935 | for (it = pbase_tree; it; it = it->next) { | |
936 | if (cmplen == 0) { | |
ce0bd642 | 937 | hash = name_hash(""); |
5379a5c5 JH |
938 | add_object_entry(it->pcache.sha1, hash, 1); |
939 | } | |
940 | else { | |
941 | struct tree_desc tree; | |
942 | tree.buf = it->pcache.tree_data; | |
943 | tree.size = it->pcache.tree_size; | |
ce0bd642 | 944 | add_pbase_object(&tree, name, cmplen, name); |
7a979d99 | 945 | } |
3f9ac8d2 | 946 | } |
3f9ac8d2 JH |
947 | } |
948 | ||
7a979d99 | 949 | static void add_preferred_base(unsigned char *sha1) |
3f9ac8d2 | 950 | { |
5379a5c5 JH |
951 | struct pbase_tree *it; |
952 | void *data; | |
953 | unsigned long size; | |
954 | unsigned char tree_sha1[20]; | |
1d6b38cc | 955 | |
8d1d8f83 JH |
956 | if (window <= num_preferred_base++) |
957 | return; | |
958 | ||
5379a5c5 JH |
959 | data = read_object_with_reference(sha1, tree_type, &size, tree_sha1); |
960 | if (!data) | |
7a979d99 | 961 | return; |
5379a5c5 JH |
962 | |
963 | for (it = pbase_tree; it; it = it->next) { | |
a89fccd2 | 964 | if (!hashcmp(it->pcache.sha1, tree_sha1)) { |
5379a5c5 JH |
965 | free(data); |
966 | return; | |
967 | } | |
968 | } | |
969 | ||
970 | it = xcalloc(1, sizeof(*it)); | |
971 | it->next = pbase_tree; | |
972 | pbase_tree = it; | |
973 | ||
e702496e | 974 | hashcpy(it->pcache.sha1, tree_sha1); |
5379a5c5 JH |
975 | it->pcache.tree_data = data; |
976 | it->pcache.tree_size = size; | |
3f9ac8d2 JH |
977 | } |
978 | ||
c323ac7d LT |
979 | static void check_object(struct object_entry *entry) |
980 | { | |
36e4d74a JH |
981 | char type[20]; |
982 | ||
7a979d99 | 983 | if (entry->in_pack && !entry->preferred_base) { |
780e6e73 | 984 | struct packed_git *p = entry->in_pack; |
03e79c88 | 985 | struct pack_window *w_curs = NULL; |
780e6e73 NP |
986 | unsigned long left = p->pack_size - entry->in_pack_offset; |
987 | unsigned long size, used; | |
988 | unsigned char *buf; | |
989 | struct object_entry *base_entry = NULL; | |
990 | ||
03e79c88 | 991 | buf = use_pack(p, &w_curs, entry->in_pack_offset, NULL); |
ab7cd7bb JH |
992 | |
993 | /* We want in_pack_type even if we do not reuse delta. | |
994 | * There is no point not reusing non-delta representations. | |
995 | */ | |
780e6e73 NP |
996 | used = unpack_object_header_gently(buf, left, |
997 | &entry->in_pack_type, &size); | |
ab7cd7bb | 998 | |
3f9ac8d2 JH |
999 | /* Check if it is delta, and the base is also an object |
1000 | * we are going to pack. If so we will reuse the existing | |
1001 | * delta. | |
1002 | */ | |
780e6e73 NP |
1003 | if (!no_reuse_delta) { |
1004 | unsigned char c, *base_name; | |
1005 | unsigned long ofs; | |
9c18df19 | 1006 | unsigned long used_0; |
780e6e73 NP |
1007 | /* there is at least 20 bytes left in the pack */ |
1008 | switch (entry->in_pack_type) { | |
1009 | case OBJ_REF_DELTA: | |
f5b1b5a0 SP |
1010 | base_name = use_pack(p, &w_curs, |
1011 | entry->in_pack_offset + used, NULL); | |
780e6e73 NP |
1012 | used += 20; |
1013 | break; | |
1014 | case OBJ_OFS_DELTA: | |
f5b1b5a0 SP |
1015 | buf = use_pack(p, &w_curs, |
1016 | entry->in_pack_offset + used, NULL); | |
9c18df19 JH |
1017 | used_0 = 0; |
1018 | c = buf[used_0++]; | |
780e6e73 NP |
1019 | ofs = c & 127; |
1020 | while (c & 128) { | |
1021 | ofs += 1; | |
1022 | if (!ofs || ofs & ~(~0UL >> 7)) | |
1023 | die("delta base offset overflow in pack for %s", | |
1024 | sha1_to_hex(entry->sha1)); | |
9c18df19 | 1025 | c = buf[used_0++]; |
780e6e73 NP |
1026 | ofs = (ofs << 7) + (c & 127); |
1027 | } | |
1028 | if (ofs >= entry->in_pack_offset) | |
1029 | die("delta base offset out of bound for %s", | |
1030 | sha1_to_hex(entry->sha1)); | |
1031 | ofs = entry->in_pack_offset - ofs; | |
1032 | base_name = find_packed_object_name(p, ofs); | |
9c18df19 | 1033 | used += used_0; |
780e6e73 NP |
1034 | break; |
1035 | default: | |
1036 | base_name = NULL; | |
1037 | } | |
1038 | if (base_name) | |
1039 | base_entry = locate_object_entry(base_name); | |
1040 | } | |
03e79c88 | 1041 | unuse_pack(&w_curs); |
780e6e73 NP |
1042 | entry->in_pack_header_size = used; |
1043 | ||
a2700696 | 1044 | if (base_entry) { |
ab7cd7bb JH |
1045 | |
1046 | /* Depth value does not matter - find_deltas() | |
1047 | * will never consider reused delta as the | |
1048 | * base object to deltify other objects | |
1049 | * against, in order to avoid circular deltas. | |
3f9ac8d2 | 1050 | */ |
ab7cd7bb JH |
1051 | |
1052 | /* uncompressed size of the delta data */ | |
780e6e73 | 1053 | entry->size = size; |
3f9ac8d2 | 1054 | entry->delta = base_entry; |
780e6e73 | 1055 | entry->type = entry->in_pack_type; |
ab7cd7bb | 1056 | |
15b4d577 JH |
1057 | entry->delta_sibling = base_entry->delta_child; |
1058 | base_entry->delta_child = entry; | |
ab7cd7bb | 1059 | |
3f9ac8d2 JH |
1060 | return; |
1061 | } | |
1062 | /* Otherwise we would do the usual */ | |
36e4d74a | 1063 | } |
3f9ac8d2 JH |
1064 | |
1065 | if (sha1_object_info(entry->sha1, type, &entry->size)) | |
36e4d74a JH |
1066 | die("unable to get type of object %s", |
1067 | sha1_to_hex(entry->sha1)); | |
3f9ac8d2 | 1068 | |
8e440259 | 1069 | if (!strcmp(type, commit_type)) { |
3f9ac8d2 | 1070 | entry->type = OBJ_COMMIT; |
8e440259 | 1071 | } else if (!strcmp(type, tree_type)) { |
3f9ac8d2 | 1072 | entry->type = OBJ_TREE; |
8e440259 | 1073 | } else if (!strcmp(type, blob_type)) { |
3f9ac8d2 | 1074 | entry->type = OBJ_BLOB; |
8e440259 | 1075 | } else if (!strcmp(type, tag_type)) { |
3f9ac8d2 JH |
1076 | entry->type = OBJ_TAG; |
1077 | } else | |
1078 | die("unable to pack object %s of type %s", | |
1079 | sha1_to_hex(entry->sha1), type); | |
1080 | } | |
1081 | ||
15b4d577 JH |
1082 | static unsigned int check_delta_limit(struct object_entry *me, unsigned int n) |
1083 | { | |
1084 | struct object_entry *child = me->delta_child; | |
1085 | unsigned int m = n; | |
1086 | while (child) { | |
1087 | unsigned int c = check_delta_limit(child, n + 1); | |
1088 | if (m < c) | |
1089 | m = c; | |
1090 | child = child->delta_sibling; | |
1091 | } | |
1092 | return m; | |
1093 | } | |
1094 | ||
c323ac7d LT |
1095 | static void get_object_details(void) |
1096 | { | |
1097 | int i; | |
15b4d577 | 1098 | struct object_entry *entry; |
c323ac7d | 1099 | |
3f9ac8d2 | 1100 | prepare_pack_ix(); |
15b4d577 JH |
1101 | for (i = 0, entry = objects; i < nr_objects; i++, entry++) |
1102 | check_object(entry); | |
b76f6b62 JH |
1103 | |
1104 | if (nr_objects == nr_result) { | |
1105 | /* | |
1106 | * Depth of objects that depend on the entry -- this | |
1107 | * is subtracted from depth-max to break too deep | |
1108 | * delta chain because of delta data reusing. | |
1109 | * However, we loosen this restriction when we know we | |
1110 | * are creating a thin pack -- it will have to be | |
1111 | * expanded on the other end anyway, so do not | |
1112 | * artificially cut the delta chain and let it go as | |
1113 | * deep as it wants. | |
1114 | */ | |
1115 | for (i = 0, entry = objects; i < nr_objects; i++, entry++) | |
1116 | if (!entry->delta && entry->delta_child) | |
1117 | entry->delta_limit = | |
1118 | check_delta_limit(entry, 1); | |
1119 | } | |
c323ac7d LT |
1120 | } |
1121 | ||
1122 | typedef int (*entry_sort_t)(const struct object_entry *, const struct object_entry *); | |
1123 | ||
1124 | static entry_sort_t current_sort; | |
1125 | ||
1126 | static int sort_comparator(const void *_a, const void *_b) | |
1127 | { | |
1128 | struct object_entry *a = *(struct object_entry **)_a; | |
1129 | struct object_entry *b = *(struct object_entry **)_b; | |
1130 | return current_sort(a,b); | |
1131 | } | |
1132 | ||
1133 | static struct object_entry **create_sorted_list(entry_sort_t sort) | |
1134 | { | |
1135 | struct object_entry **list = xmalloc(nr_objects * sizeof(struct object_entry *)); | |
1136 | int i; | |
1137 | ||
1138 | for (i = 0; i < nr_objects; i++) | |
1139 | list[i] = objects + i; | |
1140 | current_sort = sort; | |
1141 | qsort(list, nr_objects, sizeof(struct object_entry *), sort_comparator); | |
1142 | return list; | |
1143 | } | |
1144 | ||
1145 | static int sha1_sort(const struct object_entry *a, const struct object_entry *b) | |
1146 | { | |
a89fccd2 | 1147 | return hashcmp(a->sha1, b->sha1); |
c323ac7d LT |
1148 | } |
1149 | ||
962554c6 | 1150 | static struct object_entry **create_final_object_list(void) |
7a979d99 JH |
1151 | { |
1152 | struct object_entry **list; | |
1153 | int i, j; | |
1154 | ||
1155 | for (i = nr_result = 0; i < nr_objects; i++) | |
1156 | if (!objects[i].preferred_base) | |
1157 | nr_result++; | |
1158 | list = xmalloc(nr_result * sizeof(struct object_entry *)); | |
1159 | for (i = j = 0; i < nr_objects; i++) { | |
1160 | if (!objects[i].preferred_base) | |
1161 | list[j++] = objects + i; | |
1162 | } | |
1163 | current_sort = sha1_sort; | |
1164 | qsort(list, nr_result, sizeof(struct object_entry *), sort_comparator); | |
1165 | return list; | |
1166 | } | |
1167 | ||
c323ac7d LT |
1168 | static int type_size_sort(const struct object_entry *a, const struct object_entry *b) |
1169 | { | |
1170 | if (a->type < b->type) | |
1171 | return -1; | |
1172 | if (a->type > b->type) | |
1173 | return 1; | |
27225f2e LT |
1174 | if (a->hash < b->hash) |
1175 | return -1; | |
1176 | if (a->hash > b->hash) | |
1177 | return 1; | |
7a979d99 JH |
1178 | if (a->preferred_base < b->preferred_base) |
1179 | return -1; | |
1180 | if (a->preferred_base > b->preferred_base) | |
1181 | return 1; | |
c323ac7d LT |
1182 | if (a->size < b->size) |
1183 | return -1; | |
1184 | if (a->size > b->size) | |
1185 | return 1; | |
1186 | return a < b ? -1 : (a > b); | |
1187 | } | |
1188 | ||
1189 | struct unpacked { | |
1190 | struct object_entry *entry; | |
1191 | void *data; | |
f6c7081a | 1192 | struct delta_index *index; |
c323ac7d LT |
1193 | }; |
1194 | ||
1195 | /* | |
521a4f4c LT |
1196 | * We search for deltas _backwards_ in a list sorted by type and |
1197 | * by size, so that we see progressively smaller and smaller files. | |
1198 | * That's because we prefer deltas to be from the bigger file | |
1199 | * to the smaller - deletes are potentially cheaper, but perhaps | |
1200 | * more importantly, the bigger file is likely the more recent | |
1201 | * one. | |
c323ac7d | 1202 | */ |
f6c7081a | 1203 | static int try_delta(struct unpacked *trg, struct unpacked *src, |
560b25a8 | 1204 | unsigned max_depth) |
c323ac7d | 1205 | { |
f6c7081a NP |
1206 | struct object_entry *trg_entry = trg->entry; |
1207 | struct object_entry *src_entry = src->entry; | |
560b25a8 NP |
1208 | unsigned long trg_size, src_size, delta_size, sizediff, max_size, sz; |
1209 | char type[10]; | |
c323ac7d LT |
1210 | void *delta_buf; |
1211 | ||
1212 | /* Don't bother doing diffs between different types */ | |
f6c7081a | 1213 | if (trg_entry->type != src_entry->type) |
c323ac7d LT |
1214 | return -1; |
1215 | ||
7a979d99 JH |
1216 | /* We do not compute delta to *create* objects we are not |
1217 | * going to pack. | |
1218 | */ | |
f6c7081a | 1219 | if (trg_entry->preferred_base) |
75c42d8c | 1220 | return -1; |
7a979d99 | 1221 | |
51d1e83f LT |
1222 | /* |
1223 | * We do not bother to try a delta that we discarded | |
8dbbd14e | 1224 | * on an earlier try, but only when reusing delta data. |
51d1e83f | 1225 | */ |
8dbbd14e | 1226 | if (!no_reuse_delta && trg_entry->in_pack && |
e9195b58 JH |
1227 | trg_entry->in_pack == src_entry->in_pack && |
1228 | trg_entry->in_pack_type != OBJ_REF_DELTA && | |
1229 | trg_entry->in_pack_type != OBJ_OFS_DELTA) | |
51d1e83f LT |
1230 | return 0; |
1231 | ||
f6c7081a NP |
1232 | /* |
1233 | * If the current object is at pack edge, take the depth the | |
7a979d99 JH |
1234 | * objects that depend on the current object into account -- |
1235 | * otherwise they would become too deep. | |
ab7cd7bb | 1236 | */ |
f6c7081a NP |
1237 | if (trg_entry->delta_child) { |
1238 | if (max_depth <= trg_entry->delta_limit) | |
15b4d577 | 1239 | return 0; |
f6c7081a | 1240 | max_depth -= trg_entry->delta_limit; |
15b4d577 | 1241 | } |
f6c7081a | 1242 | if (src_entry->depth >= max_depth) |
d116a45a | 1243 | return 0; |
c323ac7d | 1244 | |
c3b06a69 | 1245 | /* Now some size filtering heuristics. */ |
560b25a8 NP |
1246 | trg_size = trg_entry->size; |
1247 | max_size = trg_size/2 - 20; | |
c3b06a69 NP |
1248 | max_size = max_size * (max_depth - src_entry->depth) / max_depth; |
1249 | if (max_size == 0) | |
1250 | return 0; | |
4e8da195 | 1251 | if (trg_entry->delta && trg_entry->delta_size <= max_size) |
f6c7081a NP |
1252 | max_size = trg_entry->delta_size-1; |
1253 | src_size = src_entry->size; | |
560b25a8 | 1254 | sizediff = src_size < trg_size ? trg_size - src_size : 0; |
27225f2e | 1255 | if (sizediff >= max_size) |
f527cb8c | 1256 | return 0; |
f6c7081a | 1257 | |
560b25a8 NP |
1258 | /* Load data if not already done */ |
1259 | if (!trg->data) { | |
1260 | trg->data = read_sha1_file(trg_entry->sha1, type, &sz); | |
1261 | if (sz != trg_size) | |
1262 | die("object %s inconsistent object length (%lu vs %lu)", | |
1263 | sha1_to_hex(trg_entry->sha1), sz, trg_size); | |
1264 | } | |
1265 | if (!src->data) { | |
1266 | src->data = read_sha1_file(src_entry->sha1, type, &sz); | |
1267 | if (sz != src_size) | |
1268 | die("object %s inconsistent object length (%lu vs %lu)", | |
1269 | sha1_to_hex(src_entry->sha1), sz, src_size); | |
1270 | } | |
1271 | if (!src->index) { | |
1272 | src->index = create_delta_index(src->data, src_size); | |
1273 | if (!src->index) | |
1274 | die("out of memory"); | |
1275 | } | |
1276 | ||
1277 | delta_buf = create_delta(src->index, trg->data, trg_size, &delta_size, max_size); | |
c323ac7d | 1278 | if (!delta_buf) |
75c42d8c | 1279 | return 0; |
f6c7081a NP |
1280 | |
1281 | trg_entry->delta = src_entry; | |
1282 | trg_entry->delta_size = delta_size; | |
1283 | trg_entry->depth = src_entry->depth + 1; | |
c323ac7d | 1284 | free(delta_buf); |
f6c7081a | 1285 | return 1; |
c323ac7d LT |
1286 | } |
1287 | ||
b2504a0d NP |
1288 | static void progress_interval(int signum) |
1289 | { | |
b2504a0d NP |
1290 | progress_update = 1; |
1291 | } | |
1292 | ||
d116a45a | 1293 | static void find_deltas(struct object_entry **list, int window, int depth) |
c323ac7d | 1294 | { |
521a4f4c | 1295 | int i, idx; |
c323ac7d LT |
1296 | unsigned int array_size = window * sizeof(struct unpacked); |
1297 | struct unpacked *array = xmalloc(array_size); | |
183bdb2c JH |
1298 | unsigned processed = 0; |
1299 | unsigned last_percent = 999; | |
c323ac7d LT |
1300 | |
1301 | memset(array, 0, array_size); | |
521a4f4c LT |
1302 | i = nr_objects; |
1303 | idx = 0; | |
183bdb2c | 1304 | if (progress) |
f0b0af1b | 1305 | fprintf(stderr, "Deltifying %d objects.\n", nr_result); |
21fcd1bd | 1306 | |
521a4f4c | 1307 | while (--i >= 0) { |
c323ac7d LT |
1308 | struct object_entry *entry = list[i]; |
1309 | struct unpacked *n = array + idx; | |
c323ac7d LT |
1310 | int j; |
1311 | ||
f0b0af1b JH |
1312 | if (!entry->preferred_base) |
1313 | processed++; | |
1314 | ||
183bdb2c | 1315 | if (progress) { |
f0b0af1b | 1316 | unsigned percent = processed * 100 / nr_result; |
183bdb2c JH |
1317 | if (percent != last_percent || progress_update) { |
1318 | fprintf(stderr, "%4u%% (%u/%u) done\r", | |
f0b0af1b | 1319 | percent, processed, nr_result); |
183bdb2c JH |
1320 | progress_update = 0; |
1321 | last_percent = percent; | |
1322 | } | |
21fcd1bd | 1323 | } |
3f9ac8d2 JH |
1324 | |
1325 | if (entry->delta) | |
1326 | /* This happens if we decided to reuse existing | |
ab7cd7bb | 1327 | * delta from a pack. "!no_reuse_delta &&" is implied. |
3f9ac8d2 JH |
1328 | */ |
1329 | continue; | |
1330 | ||
9a8b6a0a JH |
1331 | if (entry->size < 50) |
1332 | continue; | |
ff45715c NP |
1333 | free_delta_index(n->index); |
1334 | n->index = NULL; | |
c323ac7d | 1335 | free(n->data); |
560b25a8 | 1336 | n->data = NULL; |
c323ac7d | 1337 | n->entry = entry; |
ab7cd7bb | 1338 | |
78817c15 LT |
1339 | j = window; |
1340 | while (--j > 0) { | |
1341 | unsigned int other_idx = idx + j; | |
c323ac7d | 1342 | struct unpacked *m; |
78817c15 LT |
1343 | if (other_idx >= window) |
1344 | other_idx -= window; | |
c323ac7d LT |
1345 | m = array + other_idx; |
1346 | if (!m->entry) | |
1347 | break; | |
560b25a8 | 1348 | if (try_delta(n, m, depth) < 0) |
c323ac7d LT |
1349 | break; |
1350 | } | |
70ca1a3f JH |
1351 | /* if we made n a delta, and if n is already at max |
1352 | * depth, leaving it in the window is pointless. we | |
1353 | * should evict it first. | |
70ca1a3f JH |
1354 | */ |
1355 | if (entry->delta && depth <= entry->depth) | |
1356 | continue; | |
ff45715c | 1357 | |
521a4f4c LT |
1358 | idx++; |
1359 | if (idx >= window) | |
1360 | idx = 0; | |
c323ac7d | 1361 | } |
adee7bdf | 1362 | |
b2504a0d NP |
1363 | if (progress) |
1364 | fputc('\n', stderr); | |
1365 | ||
f6c7081a | 1366 | for (i = 0; i < window; ++i) { |
ff45715c | 1367 | free_delta_index(array[i].index); |
adee7bdf | 1368 | free(array[i].data); |
f6c7081a | 1369 | } |
adee7bdf | 1370 | free(array); |
c323ac7d LT |
1371 | } |
1372 | ||
f3123c4a JH |
1373 | static void prepare_pack(int window, int depth) |
1374 | { | |
3f9ac8d2 | 1375 | get_object_details(); |
f3123c4a JH |
1376 | sorted_by_type = create_sorted_list(type_size_sort); |
1377 | if (window && depth) | |
1378 | find_deltas(sorted_by_type, window+1, depth); | |
f3123c4a JH |
1379 | } |
1380 | ||
df6d6101 | 1381 | static int reuse_cached_pack(unsigned char *sha1) |
f3123c4a JH |
1382 | { |
1383 | static const char cache[] = "pack-cache/pack-%s.%s"; | |
1384 | char *cached_pack, *cached_idx; | |
1385 | int ifd, ofd, ifd_ix = -1; | |
1386 | ||
1387 | cached_pack = git_path(cache, sha1_to_hex(sha1), "pack"); | |
1388 | ifd = open(cached_pack, O_RDONLY); | |
1389 | if (ifd < 0) | |
1390 | return 0; | |
1391 | ||
1392 | if (!pack_to_stdout) { | |
1393 | cached_idx = git_path(cache, sha1_to_hex(sha1), "idx"); | |
1394 | ifd_ix = open(cached_idx, O_RDONLY); | |
1395 | if (ifd_ix < 0) { | |
1396 | close(ifd); | |
1397 | return 0; | |
1398 | } | |
1399 | } | |
1400 | ||
ab7cd7bb JH |
1401 | if (progress) |
1402 | fprintf(stderr, "Reusing %d objects pack %s\n", nr_objects, | |
1403 | sha1_to_hex(sha1)); | |
f3123c4a JH |
1404 | |
1405 | if (pack_to_stdout) { | |
1406 | if (copy_fd(ifd, 1)) | |
1407 | exit(1); | |
1408 | close(ifd); | |
1409 | } | |
1410 | else { | |
1411 | char name[PATH_MAX]; | |
1412 | snprintf(name, sizeof(name), | |
1413 | "%s-%s.%s", base_name, sha1_to_hex(sha1), "pack"); | |
1414 | ofd = open(name, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1415 | if (ofd < 0) | |
1416 | die("unable to open %s (%s)", name, strerror(errno)); | |
1417 | if (copy_fd(ifd, ofd)) | |
1418 | exit(1); | |
1419 | close(ifd); | |
1420 | ||
1421 | snprintf(name, sizeof(name), | |
1422 | "%s-%s.%s", base_name, sha1_to_hex(sha1), "idx"); | |
1423 | ofd = open(name, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1424 | if (ofd < 0) | |
1425 | die("unable to open %s (%s)", name, strerror(errno)); | |
1426 | if (copy_fd(ifd_ix, ofd)) | |
1427 | exit(1); | |
1428 | close(ifd_ix); | |
1429 | puts(sha1_to_hex(sha1)); | |
1430 | } | |
1431 | ||
1432 | return 1; | |
1433 | } | |
1434 | ||
fb7a6531 LT |
1435 | static void setup_progress_signal(void) |
1436 | { | |
1437 | struct sigaction sa; | |
1438 | struct itimerval v; | |
1439 | ||
1440 | memset(&sa, 0, sizeof(sa)); | |
1441 | sa.sa_handler = progress_interval; | |
1442 | sigemptyset(&sa.sa_mask); | |
1443 | sa.sa_flags = SA_RESTART; | |
1444 | sigaction(SIGALRM, &sa, NULL); | |
1445 | ||
1446 | v.it_interval.tv_sec = 1; | |
1447 | v.it_interval.tv_usec = 0; | |
1448 | v.it_value = v.it_interval; | |
1449 | setitimer(ITIMER_REAL, &v, NULL); | |
1450 | } | |
1451 | ||
4812a93a JK |
1452 | static int git_pack_config(const char *k, const char *v) |
1453 | { | |
1454 | if(!strcmp(k, "pack.window")) { | |
1455 | window = git_config_int(k, v); | |
1456 | return 0; | |
1457 | } | |
1458 | return git_default_config(k, v); | |
1459 | } | |
1460 | ||
b5d97e6b | 1461 | static void read_object_list_from_stdin(void) |
c323ac7d | 1462 | { |
b5d97e6b JH |
1463 | char line[40 + 1 + PATH_MAX + 2]; |
1464 | unsigned char sha1[20]; | |
1465 | unsigned hash; | |
b2504a0d | 1466 | |
da93d12b | 1467 | for (;;) { |
da93d12b LT |
1468 | if (!fgets(line, sizeof(line), stdin)) { |
1469 | if (feof(stdin)) | |
1470 | break; | |
1471 | if (!ferror(stdin)) | |
1472 | die("fgets returned NULL, not EOF, not error!"); | |
687dd75c JH |
1473 | if (errno != EINTR) |
1474 | die("fgets: %s", strerror(errno)); | |
1475 | clearerr(stdin); | |
1476 | continue; | |
da93d12b | 1477 | } |
7a979d99 JH |
1478 | if (line[0] == '-') { |
1479 | if (get_sha1_hex(line+1, sha1)) | |
1480 | die("expected edge sha1, got garbage:\n %s", | |
b5d97e6b | 1481 | line); |
8d1d8f83 | 1482 | add_preferred_base(sha1); |
7a979d99 | 1483 | continue; |
21fcd1bd | 1484 | } |
c323ac7d | 1485 | if (get_sha1_hex(line, sha1)) |
ef07618f | 1486 | die("expected sha1, got garbage:\n %s", line); |
b5d97e6b | 1487 | |
ce0bd642 | 1488 | hash = name_hash(line+41); |
5379a5c5 JH |
1489 | add_preferred_base_object(line+41, hash); |
1490 | add_object_entry(sha1, hash, 0); | |
c323ac7d | 1491 | } |
b5d97e6b JH |
1492 | } |
1493 | ||
b5d97e6b JH |
1494 | static void show_commit(struct commit *commit) |
1495 | { | |
1496 | unsigned hash = name_hash(""); | |
8d1d8f83 | 1497 | add_preferred_base_object("", hash); |
b5d97e6b JH |
1498 | add_object_entry(commit->object.sha1, hash, 0); |
1499 | } | |
1500 | ||
1501 | static void show_object(struct object_array_entry *p) | |
1502 | { | |
1503 | unsigned hash = name_hash(p->name); | |
8d1d8f83 | 1504 | add_preferred_base_object(p->name, hash); |
b5d97e6b JH |
1505 | add_object_entry(p->item->sha1, hash, 0); |
1506 | } | |
1507 | ||
8d1d8f83 JH |
1508 | static void show_edge(struct commit *commit) |
1509 | { | |
1510 | add_preferred_base(commit->object.sha1); | |
1511 | } | |
1512 | ||
1513 | static void get_object_list(int ac, const char **av) | |
b5d97e6b JH |
1514 | { |
1515 | struct rev_info revs; | |
1516 | char line[1000]; | |
b5d97e6b JH |
1517 | int flags = 0; |
1518 | ||
b5d97e6b JH |
1519 | init_revisions(&revs, NULL); |
1520 | save_commit_buffer = 0; | |
1521 | track_object_refs = 0; | |
1522 | setup_revisions(ac, av, &revs, NULL); | |
1523 | ||
b5d97e6b JH |
1524 | while (fgets(line, sizeof(line), stdin) != NULL) { |
1525 | int len = strlen(line); | |
1526 | if (line[len - 1] == '\n') | |
1527 | line[--len] = 0; | |
1528 | if (!len) | |
1529 | break; | |
1530 | if (*line == '-') { | |
1531 | if (!strcmp(line, "--not")) { | |
1532 | flags ^= UNINTERESTING; | |
1533 | continue; | |
1534 | } | |
1535 | die("not a rev '%s'", line); | |
1536 | } | |
1537 | if (handle_revision_arg(line, &revs, flags, 1)) | |
1538 | die("bad revision '%s'", line); | |
1539 | } | |
1540 | ||
1541 | prepare_revision_walk(&revs); | |
8d1d8f83 | 1542 | mark_edges_uninteresting(revs.commits, &revs, show_edge); |
b5d97e6b JH |
1543 | traverse_commit_list(&revs, show_commit, show_object); |
1544 | } | |
1545 | ||
1546 | int cmd_pack_objects(int argc, const char **argv, const char *prefix) | |
1547 | { | |
1548 | SHA_CTX ctx; | |
1549 | int depth = 10; | |
1550 | struct object_entry **list; | |
1551 | int use_internal_rev_list = 0; | |
8d1d8f83 | 1552 | int thin = 0; |
b5d97e6b | 1553 | int i; |
8d1d8f83 JH |
1554 | const char *rp_av[64]; |
1555 | int rp_ac; | |
1556 | ||
1557 | rp_av[0] = "pack-objects"; | |
1558 | rp_av[1] = "--objects"; /* --thin will make it --objects-edge */ | |
1559 | rp_ac = 2; | |
b5d97e6b JH |
1560 | |
1561 | git_config(git_pack_config); | |
1562 | ||
1563 | progress = isatty(2); | |
1564 | for (i = 1; i < argc; i++) { | |
1565 | const char *arg = argv[i]; | |
1566 | ||
1567 | if (*arg != '-') | |
1568 | break; | |
1569 | ||
1570 | if (!strcmp("--non-empty", arg)) { | |
1571 | non_empty = 1; | |
1572 | continue; | |
1573 | } | |
1574 | if (!strcmp("--local", arg)) { | |
1575 | local = 1; | |
1576 | continue; | |
1577 | } | |
b5d97e6b JH |
1578 | if (!strcmp("--incremental", arg)) { |
1579 | incremental = 1; | |
1580 | continue; | |
1581 | } | |
1582 | if (!strncmp("--window=", arg, 9)) { | |
1583 | char *end; | |
1584 | window = strtoul(arg+9, &end, 0); | |
1585 | if (!arg[9] || *end) | |
1586 | usage(pack_usage); | |
1587 | continue; | |
1588 | } | |
1589 | if (!strncmp("--depth=", arg, 8)) { | |
1590 | char *end; | |
1591 | depth = strtoul(arg+8, &end, 0); | |
1592 | if (!arg[8] || *end) | |
1593 | usage(pack_usage); | |
1594 | continue; | |
1595 | } | |
1596 | if (!strcmp("--progress", arg)) { | |
1597 | progress = 1; | |
1598 | continue; | |
1599 | } | |
231f240b NP |
1600 | if (!strcmp("--all-progress", arg)) { |
1601 | progress = 2; | |
1602 | continue; | |
1603 | } | |
b5d97e6b JH |
1604 | if (!strcmp("-q", arg)) { |
1605 | progress = 0; | |
1606 | continue; | |
1607 | } | |
1608 | if (!strcmp("--no-reuse-delta", arg)) { | |
1609 | no_reuse_delta = 1; | |
1610 | continue; | |
1611 | } | |
be6b1914 | 1612 | if (!strcmp("--delta-base-offset", arg)) { |
780e6e73 | 1613 | allow_ofs_delta = 1; |
be6b1914 NP |
1614 | continue; |
1615 | } | |
b5d97e6b JH |
1616 | if (!strcmp("--stdout", arg)) { |
1617 | pack_to_stdout = 1; | |
1618 | continue; | |
1619 | } | |
1620 | if (!strcmp("--revs", arg)) { | |
1621 | use_internal_rev_list = 1; | |
1622 | continue; | |
1623 | } | |
8d1d8f83 JH |
1624 | if (!strcmp("--unpacked", arg) || |
1625 | !strncmp("--unpacked=", arg, 11) || | |
63049292 | 1626 | !strcmp("--reflog", arg) || |
8d1d8f83 JH |
1627 | !strcmp("--all", arg)) { |
1628 | use_internal_rev_list = 1; | |
1629 | if (ARRAY_SIZE(rp_av) - 1 <= rp_ac) | |
1630 | die("too many internal rev-list options"); | |
1631 | rp_av[rp_ac++] = arg; | |
b5d97e6b JH |
1632 | continue; |
1633 | } | |
8d1d8f83 JH |
1634 | if (!strcmp("--thin", arg)) { |
1635 | use_internal_rev_list = 1; | |
1636 | thin = 1; | |
1637 | rp_av[1] = "--objects-edge"; | |
b5d97e6b JH |
1638 | continue; |
1639 | } | |
1640 | usage(pack_usage); | |
1641 | } | |
1642 | ||
1643 | /* Traditionally "pack-objects [options] base extra" failed; | |
1644 | * we would however want to take refs parameter that would | |
1645 | * have been given to upstream rev-list ourselves, which means | |
1646 | * we somehow want to say what the base name is. So the | |
1647 | * syntax would be: | |
1648 | * | |
1649 | * pack-objects [options] base <refs...> | |
1650 | * | |
1651 | * in other words, we would treat the first non-option as the | |
1652 | * base_name and send everything else to the internal revision | |
1653 | * walker. | |
1654 | */ | |
1655 | ||
1656 | if (!pack_to_stdout) | |
1657 | base_name = argv[i++]; | |
1658 | ||
1659 | if (pack_to_stdout != !base_name) | |
1660 | usage(pack_usage); | |
1661 | ||
8d1d8f83 JH |
1662 | if (!pack_to_stdout && thin) |
1663 | die("--thin cannot be used to build an indexable pack."); | |
b5d97e6b JH |
1664 | |
1665 | prepare_packed_git(); | |
1666 | ||
1667 | if (progress) { | |
1668 | fprintf(stderr, "Generating pack...\n"); | |
1669 | setup_progress_signal(); | |
1670 | } | |
1671 | ||
1672 | if (!use_internal_rev_list) | |
1673 | read_object_list_from_stdin(); | |
8d1d8f83 JH |
1674 | else { |
1675 | rp_av[rp_ac] = NULL; | |
1676 | get_object_list(rp_ac, rp_av); | |
1677 | } | |
b5d97e6b | 1678 | |
21fcd1bd JH |
1679 | if (progress) |
1680 | fprintf(stderr, "Done counting %d objects.\n", nr_objects); | |
f0b0af1b JH |
1681 | sorted_by_sha = create_final_object_list(); |
1682 | if (non_empty && !nr_result) | |
1c4a2912 | 1683 | return 0; |
c323ac7d | 1684 | |
84c8d8ae JH |
1685 | SHA1_Init(&ctx); |
1686 | list = sorted_by_sha; | |
7a979d99 | 1687 | for (i = 0; i < nr_result; i++) { |
84c8d8ae JH |
1688 | struct object_entry *entry = *list++; |
1689 | SHA1_Update(&ctx, entry->sha1, 20); | |
1690 | } | |
1691 | SHA1_Final(object_list_sha1, &ctx); | |
7a979d99 JH |
1692 | if (progress && (nr_objects != nr_result)) |
1693 | fprintf(stderr, "Result has %d objects.\n", nr_result); | |
84c8d8ae | 1694 | |
df6d6101 | 1695 | if (reuse_cached_pack(object_list_sha1)) |
f3123c4a JH |
1696 | ; |
1697 | else { | |
f0b0af1b JH |
1698 | if (nr_result) |
1699 | prepare_pack(window, depth); | |
fa438a2e | 1700 | if (progress == 1 && pack_to_stdout) { |
5e8dc750 NP |
1701 | /* the other end usually displays progress itself */ |
1702 | struct itimerval v = {{0,},}; | |
1703 | setitimer(ITIMER_REAL, &v, NULL); | |
1704 | signal(SIGALRM, SIG_IGN ); | |
1705 | progress_update = 0; | |
1706 | } | |
1707 | write_pack_file(); | |
f3123c4a JH |
1708 | if (!pack_to_stdout) { |
1709 | write_index_file(); | |
1710 | puts(sha1_to_hex(object_list_sha1)); | |
1711 | } | |
5f3de58f | 1712 | } |
ab7cd7bb | 1713 | if (progress) |
67c08ce1 NP |
1714 | fprintf(stderr, "Total %d (delta %d), reused %d (delta %d)\n", |
1715 | written, written_delta, reused, reused_delta); | |
c323ac7d LT |
1716 | return 0; |
1717 | } |