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pack-objects: get rid of an ugly cast
[git/spearce.git] / fast-import.c
blobf93d7d6c9bf2db021ceb65766da87af32aecc1d1
1 /*
2 Format of STDIN stream:
3
4 stream ::= cmd*;
5
6 cmd ::= new_blob
7 | new_commit
8 | new_tag
9 | reset_branch
10 | checkpoint
11 | progress
12 ;
13
14 new_blob ::= 'blob' lf
15 mark?
16 file_content;
17 file_content ::= data;
18
19 new_commit ::= 'commit' sp ref_str lf
20 mark?
21 ('author' sp name '<' email '>' when lf)?
22 'committer' sp name '<' email '>' when lf
23 commit_msg
24 ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)?
25 ('merge' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)*
26 file_change*
27 lf?;
28 commit_msg ::= data;
29
30 file_change ::= file_clr
31 | file_del
32 | file_rnm
33 | file_cpy
34 | file_obm
35 | file_inm;
36 file_clr ::= 'deleteall' lf;
37 file_del ::= 'D' sp path_str lf;
38 file_rnm ::= 'R' sp path_str sp path_str lf;
39 file_cpy ::= 'C' sp path_str sp path_str lf;
40 file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf;
41 file_inm ::= 'M' sp mode sp 'inline' sp path_str lf
42 data;
43
44 new_tag ::= 'tag' sp tag_str lf
45 'from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf
46 'tagger' sp name '<' email '>' when lf
47 tag_msg;
48 tag_msg ::= data;
49
50 reset_branch ::= 'reset' sp ref_str lf
51 ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)?
52 lf?;
53
54 checkpoint ::= 'checkpoint' lf
55 lf?;
56
57 progress ::= 'progress' sp not_lf* lf
58 lf?;
59
60 # note: the first idnum in a stream should be 1 and subsequent
61 # idnums should not have gaps between values as this will cause
62 # the stream parser to reserve space for the gapped values. An
63 # idnum can be updated in the future to a new object by issuing
64 # a new mark directive with the old idnum.
65 #
66 mark ::= 'mark' sp idnum lf;
67 data ::= (delimited_data | exact_data)
68 lf?;
69
70 # note: delim may be any string but must not contain lf.
71 # data_line may contain any data but must not be exactly
72 # delim.
73 delimited_data ::= 'data' sp '<<' delim lf
74 (data_line lf)*
75 delim lf;
76
77 # note: declen indicates the length of binary_data in bytes.
78 # declen does not include the lf preceeding the binary data.
79 #
80 exact_data ::= 'data' sp declen lf
81 binary_data;
82
83 # note: quoted strings are C-style quoting supporting \c for
84 # common escapes of 'c' (e..g \n, \t, \\, \") or \nnn where nnn
85 # is the signed byte value in octal. Note that the only
86 # characters which must actually be escaped to protect the
87 # stream formatting is: \, " and LF. Otherwise these values
88 # are UTF8.
89 #
90 ref_str ::= ref;
91 sha1exp_str ::= sha1exp;
92 tag_str ::= tag;
93 path_str ::= path | '"' quoted(path) '"' ;
94 mode ::= '100644' | '644'
95 | '100755' | '755'
96 | '120000'
97 ;
98
99 declen ::= # unsigned 32 bit value, ascii base10 notation;
100 bigint ::= # unsigned integer value, ascii base10 notation;
101 binary_data ::= # file content, not interpreted;
102
103 when ::= raw_when | rfc2822_when;
104 raw_when ::= ts sp tz;
105 rfc2822_when ::= # Valid RFC 2822 date and time;
106
107 sp ::= # ASCII space character;
108 lf ::= # ASCII newline (LF) character;
109
110 # note: a colon (':') must precede the numerical value assigned to
111 # an idnum. This is to distinguish it from a ref or tag name as
112 # GIT does not permit ':' in ref or tag strings.
113 #
114 idnum ::= ':' bigint;
115 path ::= # GIT style file path, e.g. "a/b/c";
116 ref ::= # GIT ref name, e.g. "refs/heads/MOZ_GECKO_EXPERIMENT";
117 tag ::= # GIT tag name, e.g. "FIREFOX_1_5";
118 sha1exp ::= # Any valid GIT SHA1 expression;
119 hexsha1 ::= # SHA1 in hexadecimal format;
120
121 # note: name and email are UTF8 strings, however name must not
122 # contain '<' or lf and email must not contain any of the
123 # following: '<', '>', lf.
124 #
125 name ::= # valid GIT author/committer name;
126 email ::= # valid GIT author/committer email;
127 ts ::= # time since the epoch in seconds, ascii base10 notation;
128 tz ::= # GIT style timezone;
129
130 # note: comments may appear anywhere in the input, except
131 # within a data command. Any form of the data command
132 # always escapes the related input from comment processing.
133 #
134 # In case it is not clear, the '#' that starts the comment
135 # must be the first character on that the line (an lf have
136 # preceeded it).
137 #
138 comment ::= '#' not_lf* lf;
139 not_lf ::= # Any byte that is not ASCII newline (LF);
140 */
141
142 #include "builtin.h"
143 #include "cache.h"
144 #include "object.h"
145 #include "blob.h"
146 #include "tree.h"
147 #include "commit.h"
148 #include "delta.h"
149 #include "pack.h"
150 #include "refs.h"
151 #include "csum-file.h"
152 #include "quote.h"
153
154 #define PACK_ID_BITS 16
155 #define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
156
157 struct object_entry
158 {
159 struct object_entry *next;
160 uint32_t offset;
161 unsigned type : TYPE_BITS;
162 unsigned pack_id : PACK_ID_BITS;
163 unsigned char sha1[20];
164 };
165
166 struct object_entry_pool
167 {
168 struct object_entry_pool *next_pool;
169 struct object_entry *next_free;
170 struct object_entry *end;
171 struct object_entry entries[FLEX_ARRAY]; /* more */
172 };
173
174 struct mark_set
175 {
176 union {
177 struct object_entry *marked[1024];
178 struct mark_set *sets[1024];
179 } data;
180 unsigned int shift;
181 };
182
183 struct last_object
184 {
185 struct strbuf data;
186 uint32_t offset;
187 unsigned int depth;
188 unsigned no_swap : 1;
189 };
190
191 struct mem_pool
192 {
193 struct mem_pool *next_pool;
194 char *next_free;
195 char *end;
196 char space[FLEX_ARRAY]; /* more */
197 };
198
199 struct atom_str
200 {
201 struct atom_str *next_atom;
202 unsigned short str_len;
203 char str_dat[FLEX_ARRAY]; /* more */
204 };
205
206 struct tree_content;
207 struct tree_entry
208 {
209 struct tree_content *tree;
210 struct atom_str* name;
211 struct tree_entry_ms
212 {
213 uint16_t mode;
214 unsigned char sha1[20];
215 } versions[2];
216 };
217
218 struct tree_content
219 {
220 unsigned int entry_capacity; /* must match avail_tree_content */
221 unsigned int entry_count;
222 unsigned int delta_depth;
223 struct tree_entry *entries[FLEX_ARRAY]; /* more */
224 };
225
226 struct avail_tree_content
227 {
228 unsigned int entry_capacity; /* must match tree_content */
229 struct avail_tree_content *next_avail;
230 };
231
232 struct branch
233 {
234 struct branch *table_next_branch;
235 struct branch *active_next_branch;
236 const char *name;
237 struct tree_entry branch_tree;
238 uintmax_t last_commit;
239 unsigned active : 1;
240 unsigned pack_id : PACK_ID_BITS;
241 unsigned char sha1[20];
242 };
243
244 struct tag
245 {
246 struct tag *next_tag;
247 const char *name;
248 unsigned int pack_id;
249 unsigned char sha1[20];
250 };
251
252 struct hash_list
253 {
254 struct hash_list *next;
255 unsigned char sha1[20];
256 };
257
258 typedef enum {
259 WHENSPEC_RAW = 1,
260 WHENSPEC_RFC2822,
261 WHENSPEC_NOW,
262 } whenspec_type;
263
264 struct recent_command
265 {
266 struct recent_command *prev;
267 struct recent_command *next;
268 char *buf;
269 };
270
271 /* Configured limits on output */
272 static unsigned long max_depth = 10;
273 static off_t max_packsize = (1LL << 32) - 1;
274 static int force_update;
275
276 /* Stats and misc. counters */
277 static uintmax_t alloc_count;
278 static uintmax_t marks_set_count;
279 static uintmax_t object_count_by_type[1 << TYPE_BITS];
280 static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
281 static uintmax_t delta_count_by_type[1 << TYPE_BITS];
282 static unsigned long object_count;
283 static unsigned long branch_count;
284 static unsigned long branch_load_count;
285 static int failure;
286 static FILE *pack_edges;
287
288 /* Memory pools */
289 static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
290 static size_t total_allocd;
291 static struct mem_pool *mem_pool;
292
293 /* Atom management */
294 static unsigned int atom_table_sz = 4451;
295 static unsigned int atom_cnt;
296 static struct atom_str **atom_table;
297
298 /* The .pack file being generated */
299 static unsigned int pack_id;
300 static struct packed_git *pack_data;
301 static struct packed_git **all_packs;
302 static unsigned long pack_size;
303
304 /* Table of objects we've written. */
305 static unsigned int object_entry_alloc = 5000;
306 static struct object_entry_pool *blocks;
307 static struct object_entry *object_table[1 << 16];
308 static struct mark_set *marks;
309 static const char* mark_file;
310
311 /* Our last blob */
312 static struct last_object last_blob = { STRBUF_INIT, 0, 0, 0 };
313
314 /* Tree management */
315 static unsigned int tree_entry_alloc = 1000;
316 static void *avail_tree_entry;
317 static unsigned int avail_tree_table_sz = 100;
318 static struct avail_tree_content **avail_tree_table;
319 static struct strbuf old_tree = STRBUF_INIT;
320 static struct strbuf new_tree = STRBUF_INIT;
321
322 /* Branch data */
323 static unsigned long max_active_branches = 5;
324 static unsigned long cur_active_branches;
325 static unsigned long branch_table_sz = 1039;
326 static struct branch **branch_table;
327 static struct branch *active_branches;
328
329 /* Tag data */
330 static struct tag *first_tag;
331 static struct tag *last_tag;
332
333 /* Input stream parsing */
334 static whenspec_type whenspec = WHENSPEC_RAW;
335 static struct strbuf command_buf = STRBUF_INIT;
336 static int unread_command_buf;
337 static struct recent_command cmd_hist = {&cmd_hist, &cmd_hist, NULL};
338 static struct recent_command *cmd_tail = &cmd_hist;
339 static struct recent_command *rc_free;
340 static unsigned int cmd_save = 100;
341 static uintmax_t next_mark;
342 static struct strbuf new_data = STRBUF_INIT;
343
344 static void write_branch_report(FILE *rpt, struct branch *b)
345 {
346 fprintf(rpt, "%s:\n", b->name);
347
348 fprintf(rpt, " status :");
349 if (b->active)
350 fputs(" active", rpt);
351 if (b->branch_tree.tree)
352 fputs(" loaded", rpt);
353 if (is_null_sha1(b->branch_tree.versions[1].sha1))
354 fputs(" dirty", rpt);
355 fputc('\n', rpt);
356
357 fprintf(rpt, " tip commit : %s\n", sha1_to_hex(b->sha1));
358 fprintf(rpt, " old tree : %s\n", sha1_to_hex(b->branch_tree.versions[0].sha1));
359 fprintf(rpt, " cur tree : %s\n", sha1_to_hex(b->branch_tree.versions[1].sha1));
360 fprintf(rpt, " commit clock: %" PRIuMAX "\n", b->last_commit);
361
362 fputs(" last pack : ", rpt);
363 if (b->pack_id < MAX_PACK_ID)
364 fprintf(rpt, "%u", b->pack_id);
365 fputc('\n', rpt);
366
367 fputc('\n', rpt);
368 }
369
370 static void write_crash_report(const char *err)
371 {
372 char *loc = git_path("fast_import_crash_%d", getpid());
373 FILE *rpt = fopen(loc, "w");
374 struct branch *b;
375 unsigned long lu;
376 struct recent_command *rc;
377
378 if (!rpt) {
379 error("can't write crash report %s: %s", loc, strerror(errno));
380 return;
381 }
382
383 fprintf(stderr, "fast-import: dumping crash report to %s\n", loc);
384
385 fprintf(rpt, "fast-import crash report:\n");
386 fprintf(rpt, " fast-import process: %d\n", getpid());
387 fprintf(rpt, " parent process : %d\n", getppid());
388 fprintf(rpt, " at %s\n", show_date(time(NULL), 0, DATE_LOCAL));
389 fputc('\n', rpt);
390
391 fputs("fatal: ", rpt);
392 fputs(err, rpt);
393 fputc('\n', rpt);
394
395 fputc('\n', rpt);
396 fputs("Most Recent Commands Before Crash\n", rpt);
397 fputs("---------------------------------\n", rpt);
398 for (rc = cmd_hist.next; rc != &cmd_hist; rc = rc->next) {
399 if (rc->next == &cmd_hist)
400 fputs("* ", rpt);
401 else
402 fputs(" ", rpt);
403 fputs(rc->buf, rpt);
404 fputc('\n', rpt);
405 }
406
407 fputc('\n', rpt);
408 fputs("Active Branch LRU\n", rpt);
409 fputs("-----------------\n", rpt);
410 fprintf(rpt, " active_branches = %lu cur, %lu max\n",
411 cur_active_branches,
412 max_active_branches);
413 fputc('\n', rpt);
414 fputs(" pos clock name\n", rpt);
415 fputs(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n", rpt);
416 for (b = active_branches, lu = 0; b; b = b->active_next_branch)
417 fprintf(rpt, " %2lu) %6" PRIuMAX" %s\n",
418 ++lu, b->last_commit, b->name);
419
420 fputc('\n', rpt);
421 fputs("Inactive Branches\n", rpt);
422 fputs("-----------------\n", rpt);
423 for (lu = 0; lu < branch_table_sz; lu++) {
424 for (b = branch_table[lu]; b; b = b->table_next_branch)
425 write_branch_report(rpt, b);
426 }
427
428 fputc('\n', rpt);
429 fputs("-------------------\n", rpt);
430 fputs("END OF CRASH REPORT\n", rpt);
431 fclose(rpt);
432 }
433
434 static NORETURN void die_nicely(const char *err, va_list params)
435 {
436 static int zombie;
437 char message[2 * PATH_MAX];
438
439 vsnprintf(message, sizeof(message), err, params);
440 fputs("fatal: ", stderr);
441 fputs(message, stderr);
442 fputc('\n', stderr);
443
444 if (!zombie) {
445 zombie = 1;
446 write_crash_report(message);
447 }
448 exit(128);
449 }
450
451 static void alloc_objects(unsigned int cnt)
452 {
453 struct object_entry_pool *b;
454
455 b = xmalloc(sizeof(struct object_entry_pool)
456 + cnt * sizeof(struct object_entry));
457 b->next_pool = blocks;
458 b->next_free = b->entries;
459 b->end = b->entries + cnt;
460 blocks = b;
461 alloc_count += cnt;
462 }
463
464 static struct object_entry *new_object(unsigned char *sha1)
465 {
466 struct object_entry *e;
467
468 if (blocks->next_free == blocks->end)
469 alloc_objects(object_entry_alloc);
470
471 e = blocks->next_free++;
472 hashcpy(e->sha1, sha1);
473 return e;
474 }
475
476 static struct object_entry *find_object(unsigned char *sha1)
477 {
478 unsigned int h = sha1[0] << 8 | sha1[1];
479 struct object_entry *e;
480 for (e = object_table[h]; e; e = e->next)
481 if (!hashcmp(sha1, e->sha1))
482 return e;
483 return NULL;
484 }
485
486 static struct object_entry *insert_object(unsigned char *sha1)
487 {
488 unsigned int h = sha1[0] << 8 | sha1[1];
489 struct object_entry *e = object_table[h];
490 struct object_entry *p = NULL;
491
492 while (e) {
493 if (!hashcmp(sha1, e->sha1))
494 return e;
495 p = e;
496 e = e->next;
497 }
498
499 e = new_object(sha1);
500 e->next = NULL;
501 e->offset = 0;
502 if (p)
503 p->next = e;
504 else
505 object_table[h] = e;
506 return e;
507 }
508
509 static unsigned int hc_str(const char *s, size_t len)
510 {
511 unsigned int r = 0;
512 while (len-- > 0)
513 r = r * 31 + *s++;
514 return r;
515 }
516
517 static void *pool_alloc(size_t len)
518 {
519 struct mem_pool *p;
520 void *r;
521
522 for (p = mem_pool; p; p = p->next_pool)
523 if ((p->end - p->next_free >= len))
524 break;
525
526 if (!p) {
527 if (len >= (mem_pool_alloc/2)) {
528 total_allocd += len;
529 return xmalloc(len);
530 }
531 total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
532 p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc);
533 p->next_pool = mem_pool;
534 p->next_free = p->space;
535 p->end = p->next_free + mem_pool_alloc;
536 mem_pool = p;
537 }
538
539 r = p->next_free;
540 /* round out to a pointer alignment */
541 if (len & (sizeof(void*) - 1))
542 len += sizeof(void*) - (len & (sizeof(void*) - 1));
543 p->next_free += len;
544 return r;
545 }
546
547 static void *pool_calloc(size_t count, size_t size)
548 {
549 size_t len = count * size;
550 void *r = pool_alloc(len);
551 memset(r, 0, len);
552 return r;
553 }
554
555 static char *pool_strdup(const char *s)
556 {
557 char *r = pool_alloc(strlen(s) + 1);
558 strcpy(r, s);
559 return r;
560 }
561
562 static void insert_mark(uintmax_t idnum, struct object_entry *oe)
563 {
564 struct mark_set *s = marks;
565 while ((idnum >> s->shift) >= 1024) {
566 s = pool_calloc(1, sizeof(struct mark_set));
567 s->shift = marks->shift + 10;
568 s->data.sets[0] = marks;
569 marks = s;
570 }
571 while (s->shift) {
572 uintmax_t i = idnum >> s->shift;
573 idnum -= i << s->shift;
574 if (!s->data.sets[i]) {
575 s->data.sets[i] = pool_calloc(1, sizeof(struct mark_set));
576 s->data.sets[i]->shift = s->shift - 10;
577 }
578 s = s->data.sets[i];
579 }
580 if (!s->data.marked[idnum])
581 marks_set_count++;
582 s->data.marked[idnum] = oe;
583 }
584
585 static struct object_entry *find_mark(uintmax_t idnum)
586 {
587 uintmax_t orig_idnum = idnum;
588 struct mark_set *s = marks;
589 struct object_entry *oe = NULL;
590 if ((idnum >> s->shift) < 1024) {
591 while (s && s->shift) {
592 uintmax_t i = idnum >> s->shift;
593 idnum -= i << s->shift;
594 s = s->data.sets[i];
595 }
596 if (s)
597 oe = s->data.marked[idnum];
598 }
599 if (!oe)
600 die("mark :%" PRIuMAX " not declared", orig_idnum);
601 return oe;
602 }
603
604 static struct atom_str *to_atom(const char *s, unsigned short len)
605 {
606 unsigned int hc = hc_str(s, len) % atom_table_sz;
607 struct atom_str *c;
608
609 for (c = atom_table[hc]; c; c = c->next_atom)
610 if (c->str_len == len && !strncmp(s, c->str_dat, len))
611 return c;
612
613 c = pool_alloc(sizeof(struct atom_str) + len + 1);
614 c->str_len = len;
615 strncpy(c->str_dat, s, len);
616 c->str_dat[len] = 0;
617 c->next_atom = atom_table[hc];
618 atom_table[hc] = c;
619 atom_cnt++;
620 return c;
621 }
622
623 static struct branch *lookup_branch(const char *name)
624 {
625 unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
626 struct branch *b;
627
628 for (b = branch_table[hc]; b; b = b->table_next_branch)
629 if (!strcmp(name, b->name))
630 return b;
631 return NULL;
632 }
633
634 static struct branch *new_branch(const char *name)
635 {
636 unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
637 struct branch* b = lookup_branch(name);
638
639 if (b)
640 die("Invalid attempt to create duplicate branch: %s", name);
641 switch (check_ref_format(name)) {
642 case 0: break; /* its valid */
643 case -2: break; /* valid, but too few '/', allow anyway */
644 default:
645 die("Branch name doesn't conform to GIT standards: %s", name);
646 }
647
648 b = pool_calloc(1, sizeof(struct branch));
649 b->name = pool_strdup(name);
650 b->table_next_branch = branch_table[hc];
651 b->branch_tree.versions[0].mode = S_IFDIR;
652 b->branch_tree.versions[1].mode = S_IFDIR;
653 b->active = 0;
654 b->pack_id = MAX_PACK_ID;
655 branch_table[hc] = b;
656 branch_count++;
657 return b;
658 }
659
660 static unsigned int hc_entries(unsigned int cnt)
661 {
662 cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
663 return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
664 }
665
666 static struct tree_content *new_tree_content(unsigned int cnt)
667 {
668 struct avail_tree_content *f, *l = NULL;
669 struct tree_content *t;
670 unsigned int hc = hc_entries(cnt);
671
672 for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
673 if (f->entry_capacity >= cnt)
674 break;
675
676 if (f) {
677 if (l)
678 l->next_avail = f->next_avail;
679 else
680 avail_tree_table[hc] = f->next_avail;
681 } else {
682 cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
683 f = pool_alloc(sizeof(*t) + sizeof(t->entries[0]) * cnt);
684 f->entry_capacity = cnt;
685 }
686
687 t = (struct tree_content*)f;
688 t->entry_count = 0;
689 t->delta_depth = 0;
690 return t;
691 }
692
693 static void release_tree_entry(struct tree_entry *e);
694 static void release_tree_content(struct tree_content *t)
695 {
696 struct avail_tree_content *f = (struct avail_tree_content*)t;
697 unsigned int hc = hc_entries(f->entry_capacity);
698 f->next_avail = avail_tree_table[hc];
699 avail_tree_table[hc] = f;
700 }
701
702 static void release_tree_content_recursive(struct tree_content *t)
703 {
704 unsigned int i;
705 for (i = 0; i < t->entry_count; i++)
706 release_tree_entry(t->entries[i]);
707 release_tree_content(t);
708 }
709
710 static struct tree_content *grow_tree_content(
711 struct tree_content *t,
712 int amt)
713 {
714 struct tree_content *r = new_tree_content(t->entry_count + amt);
715 r->entry_count = t->entry_count;
716 r->delta_depth = t->delta_depth;
717 memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
718 release_tree_content(t);
719 return r;
720 }
721
722 static struct tree_entry *new_tree_entry(void)
723 {
724 struct tree_entry *e;
725
726 if (!avail_tree_entry) {
727 unsigned int n = tree_entry_alloc;
728 total_allocd += n * sizeof(struct tree_entry);
729 avail_tree_entry = e = xmalloc(n * sizeof(struct tree_entry));
730 while (n-- > 1) {
731 *((void**)e) = e + 1;
732 e++;
733 }
734 *((void**)e) = NULL;
735 }
736
737 e = avail_tree_entry;
738 avail_tree_entry = *((void**)e);
739 return e;
740 }
741
742 static void release_tree_entry(struct tree_entry *e)
743 {
744 if (e->tree)
745 release_tree_content_recursive(e->tree);
746 *((void**)e) = avail_tree_entry;
747 avail_tree_entry = e;
748 }
749
750 static struct tree_content *dup_tree_content(struct tree_content *s)
751 {
752 struct tree_content *d;
753 struct tree_entry *a, *b;
754 unsigned int i;
755
756 if (!s)
757 return NULL;
758 d = new_tree_content(s->entry_count);
759 for (i = 0; i < s->entry_count; i++) {
760 a = s->entries[i];
761 b = new_tree_entry();
762 memcpy(b, a, sizeof(*a));
763 if (a->tree && is_null_sha1(b->versions[1].sha1))
764 b->tree = dup_tree_content(a->tree);
765 else
766 b->tree = NULL;
767 d->entries[i] = b;
768 }
769 d->entry_count = s->entry_count;
770 d->delta_depth = s->delta_depth;
771
772 return d;
773 }
774
775 static void start_packfile(void)
776 {
777 static char tmpfile[PATH_MAX];
778 struct packed_git *p;
779 struct pack_header hdr;
780 int pack_fd;
781
782 snprintf(tmpfile, sizeof(tmpfile),
783 "%s/tmp_pack_XXXXXX", get_object_directory());
784 pack_fd = xmkstemp(tmpfile);
785 p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
786 strcpy(p->pack_name, tmpfile);
787 p->pack_fd = pack_fd;
788
789 hdr.hdr_signature = htonl(PACK_SIGNATURE);
790 hdr.hdr_version = htonl(2);
791 hdr.hdr_entries = 0;
792 write_or_die(p->pack_fd, &hdr, sizeof(hdr));
793
794 pack_data = p;
795 pack_size = sizeof(hdr);
796 object_count = 0;
797
798 all_packs = xrealloc(all_packs, sizeof(*all_packs) * (pack_id + 1));
799 all_packs[pack_id] = p;
800 }
801
802 static int oecmp (const void *a_, const void *b_)
803 {
804 struct object_entry *a = *((struct object_entry**)a_);
805 struct object_entry *b = *((struct object_entry**)b_);
806 return hashcmp(a->sha1, b->sha1);
807 }
808
809 static char *create_index(void)
810 {
811 static char tmpfile[PATH_MAX];
812 SHA_CTX ctx;
813 struct sha1file *f;
814 struct object_entry **idx, **c, **last, *e;
815 struct object_entry_pool *o;
816 uint32_t array[256];
817 int i, idx_fd;
818
819 /* Build the sorted table of object IDs. */
820 idx = xmalloc(object_count * sizeof(struct object_entry*));
821 c = idx;
822 for (o = blocks; o; o = o->next_pool)
823 for (e = o->next_free; e-- != o->entries;)
824 if (pack_id == e->pack_id)
825 *c++ = e;
826 last = idx + object_count;
827 if (c != last)
828 die("internal consistency error creating the index");
829 qsort(idx, object_count, sizeof(struct object_entry*), oecmp);
830
831 /* Generate the fan-out array. */
832 c = idx;
833 for (i = 0; i < 256; i++) {
834 struct object_entry **next = c;;
835 while (next < last) {
836 if ((*next)->sha1[0] != i)
837 break;
838 next++;
839 }
840 array[i] = htonl(next - idx);
841 c = next;
842 }
843
844 snprintf(tmpfile, sizeof(tmpfile),
845 "%s/tmp_idx_XXXXXX", get_object_directory());
846 idx_fd = xmkstemp(tmpfile);
847 f = sha1fd(idx_fd, tmpfile);
848 sha1write(f, array, 256 * sizeof(int));
849 SHA1_Init(&ctx);
850 for (c = idx; c != last; c++) {
851 uint32_t offset = htonl((*c)->offset);
852 sha1write(f, &offset, 4);
853 sha1write(f, (*c)->sha1, sizeof((*c)->sha1));
854 SHA1_Update(&ctx, (*c)->sha1, 20);
855 }
856 sha1write(f, pack_data->sha1, sizeof(pack_data->sha1));
857 sha1close(f, NULL, 1);
858 free(idx);
859 SHA1_Final(pack_data->sha1, &ctx);
860 return tmpfile;
861 }
862
863 static char *keep_pack(char *curr_index_name)
864 {
865 static char name[PATH_MAX];
866 static const char *keep_msg = "fast-import";
867 int keep_fd;
868
869 chmod(pack_data->pack_name, 0444);
870 chmod(curr_index_name, 0444);
871
872 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
873 get_object_directory(), sha1_to_hex(pack_data->sha1));
874 keep_fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
875 if (keep_fd < 0)
876 die("cannot create keep file");
877 write(keep_fd, keep_msg, strlen(keep_msg));
878 close(keep_fd);
879
880 snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
881 get_object_directory(), sha1_to_hex(pack_data->sha1));
882 if (move_temp_to_file(pack_data->pack_name, name))
883 die("cannot store pack file");
884
885 snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
886 get_object_directory(), sha1_to_hex(pack_data->sha1));
887 if (move_temp_to_file(curr_index_name, name))
888 die("cannot store index file");
889 return name;
890 }
891
892 static void unkeep_all_packs(void)
893 {
894 static char name[PATH_MAX];
895 int k;
896
897 for (k = 0; k < pack_id; k++) {
898 struct packed_git *p = all_packs[k];
899 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
900 get_object_directory(), sha1_to_hex(p->sha1));
901 unlink(name);
902 }
903 }
904
905 static void end_packfile(void)
906 {
907 struct packed_git *old_p = pack_data, *new_p;
908
909 if (object_count) {
910 char *idx_name;
911 int i;
912 struct branch *b;
913 struct tag *t;
914
915 fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
916 pack_data->pack_name, object_count);
917 close(pack_data->pack_fd);
918 idx_name = keep_pack(create_index());
919
920 /* Register the packfile with core git's machinary. */
921 new_p = add_packed_git(idx_name, strlen(idx_name), 1);
922 if (!new_p)
923 die("core git rejected index %s", idx_name);
924 new_p->windows = old_p->windows;
925 all_packs[pack_id] = new_p;
926 install_packed_git(new_p);
927
928 /* Print the boundary */
929 if (pack_edges) {
930 fprintf(pack_edges, "%s:", new_p->pack_name);
931 for (i = 0; i < branch_table_sz; i++) {
932 for (b = branch_table[i]; b; b = b->table_next_branch) {
933 if (b->pack_id == pack_id)
934 fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
935 }
936 }
937 for (t = first_tag; t; t = t->next_tag) {
938 if (t->pack_id == pack_id)
939 fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
940 }
941 fputc('\n', pack_edges);
942 fflush(pack_edges);
943 }
944
945 pack_id++;
946 }
947 else
948 unlink(old_p->pack_name);
949 free(old_p);
950
951 /* We can't carry a delta across packfiles. */
952 strbuf_release(&last_blob.data);
953 last_blob.offset = 0;
954 last_blob.depth = 0;
955 }
956
957 static void cycle_packfile(void)
958 {
959 end_packfile();
960 start_packfile();
961 }
962
963 static size_t encode_header(
964 enum object_type type,
965 size_t size,
966 unsigned char *hdr)
967 {
968 int n = 1;
969 unsigned char c;
970
971 if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
972 die("bad type %d", type);
973
974 c = (type << 4) | (size & 15);
975 size >>= 4;
976 while (size) {
977 *hdr++ = c | 0x80;
978 c = size & 0x7f;
979 size >>= 7;
980 n++;
981 }
982 *hdr = c;
983 return n;
984 }
985
986 static int store_object(
987 enum object_type type,
988 struct strbuf *dat,
989 struct last_object *last,
990 unsigned char *sha1out,
991 uintmax_t mark)
992 {
993 void *out, *delta;
994 struct object_entry *e;
995 unsigned char hdr[96];
996 unsigned char sha1[20];
997 unsigned long hdrlen, deltalen;
998 SHA_CTX c;
999 z_stream s;
1000
1001 hdrlen = sprintf((char*)hdr,"%s %lu", typename(type),
1002 (unsigned long)dat->len) + 1;
1003 SHA1_Init(&c);
1004 SHA1_Update(&c, hdr, hdrlen);
1005 SHA1_Update(&c, dat->buf, dat->len);
1006 SHA1_Final(sha1, &c);
1007 if (sha1out)
1008 hashcpy(sha1out, sha1);
1009
1010 e = insert_object(sha1);
1011 if (mark)
1012 insert_mark(mark, e);
1013 if (e->offset) {
1014 duplicate_count_by_type[type]++;
1015 return 1;
1016 } else if (find_sha1_pack(sha1, packed_git)) {
1017 e->type = type;
1018 e->pack_id = MAX_PACK_ID;
1019 e->offset = 1; /* just not zero! */
1020 duplicate_count_by_type[type]++;
1021 return 1;
1022 }
1023
1024 if (last && last->data.buf && last->depth < max_depth) {
1025 delta = diff_delta(last->data.buf, last->data.len,
1026 dat->buf, dat->len,
1027 &deltalen, 0);
1028 if (delta && deltalen >= dat->len) {
1029 free(delta);
1030 delta = NULL;
1031 }
1032 } else
1033 delta = NULL;
1034
1035 memset(&s, 0, sizeof(s));
1036 deflateInit(&s, zlib_compression_level);
1037 if (delta) {
1038 s.next_in = delta;
1039 s.avail_in = deltalen;
1040 } else {
1041 s.next_in = (void *)dat->buf;
1042 s.avail_in = dat->len;
1043 }
1044 s.avail_out = deflateBound(&s, s.avail_in);
1045 s.next_out = out = xmalloc(s.avail_out);
1046 while (deflate(&s, Z_FINISH) == Z_OK)
1047 /* nothing */;
1048 deflateEnd(&s);
1049
1050 /* Determine if we should auto-checkpoint. */
1051 if ((pack_size + 60 + s.total_out) > max_packsize
1052 || (pack_size + 60 + s.total_out) < pack_size) {
1053
1054 /* This new object needs to *not* have the current pack_id. */
1055 e->pack_id = pack_id + 1;
1056 cycle_packfile();
1057
1058 /* We cannot carry a delta into the new pack. */
1059 if (delta) {
1060 free(delta);
1061 delta = NULL;
1062
1063 memset(&s, 0, sizeof(s));
1064 deflateInit(&s, zlib_compression_level);
1065 s.next_in = (void *)dat->buf;
1066 s.avail_in = dat->len;
1067 s.avail_out = deflateBound(&s, s.avail_in);
1068 s.next_out = out = xrealloc(out, s.avail_out);
1069 while (deflate(&s, Z_FINISH) == Z_OK)
1070 /* nothing */;
1071 deflateEnd(&s);
1072 }
1073 }
1074
1075 e->type = type;
1076 e->pack_id = pack_id;
1077 e->offset = pack_size;
1078 object_count++;
1079 object_count_by_type[type]++;
1080
1081 if (delta) {
1082 unsigned long ofs = e->offset - last->offset;
1083 unsigned pos = sizeof(hdr) - 1;
1084
1085 delta_count_by_type[type]++;
1086 last->depth++;
1087
1088 hdrlen = encode_header(OBJ_OFS_DELTA, deltalen, hdr);
1089 write_or_die(pack_data->pack_fd, hdr, hdrlen);
1090 pack_size += hdrlen;
1091
1092 hdr[pos] = ofs & 127;
1093 while (ofs >>= 7)
1094 hdr[--pos] = 128 | (--ofs & 127);
1095 write_or_die(pack_data->pack_fd, hdr + pos, sizeof(hdr) - pos);
1096 pack_size += sizeof(hdr) - pos;
1097 } else {
1098 if (last)
1099 last->depth = 0;
1100 hdrlen = encode_header(type, dat->len, hdr);
1101 write_or_die(pack_data->pack_fd, hdr, hdrlen);
1102 pack_size += hdrlen;
1103 }
1104
1105 write_or_die(pack_data->pack_fd, out, s.total_out);
1106 pack_size += s.total_out;
1107
1108 free(out);
1109 free(delta);
1110 if (last) {
1111 if (last->no_swap) {
1112 last->data = *dat;
1113 } else {
1114 strbuf_swap(&last->data, dat);
1115 }
1116 last->offset = e->offset;
1117 }
1118 return 0;
1119 }
1120
1121 static void *gfi_unpack_entry(
1122 struct object_entry *oe,
1123 unsigned long *sizep)
1124 {
1125 enum object_type type;
1126 struct packed_git *p = all_packs[oe->pack_id];
1127 if (p == pack_data)
1128 p->pack_size = pack_size + 20;
1129 return unpack_entry(p, oe->offset, &type, sizep);
1130 }
1131
1132 static const char *get_mode(const char *str, uint16_t *modep)
1133 {
1134 unsigned char c;
1135 uint16_t mode = 0;
1136
1137 while ((c = *str++) != ' ') {
1138 if (c < '0' || c > '7')
1139 return NULL;
1140 mode = (mode << 3) + (c - '0');
1141 }
1142 *modep = mode;
1143 return str;
1144 }
1145
1146 static void load_tree(struct tree_entry *root)
1147 {
1148 unsigned char* sha1 = root->versions[1].sha1;
1149 struct object_entry *myoe;
1150 struct tree_content *t;
1151 unsigned long size;
1152 char *buf;
1153 const char *c;
1154
1155 root->tree = t = new_tree_content(8);
1156 if (is_null_sha1(sha1))
1157 return;
1158
1159 myoe = find_object(sha1);
1160 if (myoe && myoe->pack_id != MAX_PACK_ID) {
1161 if (myoe->type != OBJ_TREE)
1162 die("Not a tree: %s", sha1_to_hex(sha1));
1163 t->delta_depth = 0;
1164 buf = gfi_unpack_entry(myoe, &size);
1165 } else {
1166 enum object_type type;
1167 buf = read_sha1_file(sha1, &type, &size);
1168 if (!buf || type != OBJ_TREE)
1169 die("Can't load tree %s", sha1_to_hex(sha1));
1170 }
1171
1172 c = buf;
1173 while (c != (buf + size)) {
1174 struct tree_entry *e = new_tree_entry();
1175
1176 if (t->entry_count == t->entry_capacity)
1177 root->tree = t = grow_tree_content(t, t->entry_count);
1178 t->entries[t->entry_count++] = e;
1179
1180 e->tree = NULL;
1181 c = get_mode(c, &e->versions[1].mode);
1182 if (!c)
1183 die("Corrupt mode in %s", sha1_to_hex(sha1));
1184 e->versions[0].mode = e->versions[1].mode;
1185 e->name = to_atom(c, strlen(c));
1186 c += e->name->str_len + 1;
1187 hashcpy(e->versions[0].sha1, (unsigned char*)c);
1188 hashcpy(e->versions[1].sha1, (unsigned char*)c);
1189 c += 20;
1190 }
1191 free(buf);
1192 }
1193
1194 static int tecmp0 (const void *_a, const void *_b)
1195 {
1196 struct tree_entry *a = *((struct tree_entry**)_a);
1197 struct tree_entry *b = *((struct tree_entry**)_b);
1198 return base_name_compare(
1199 a->name->str_dat, a->name->str_len, a->versions[0].mode,
1200 b->name->str_dat, b->name->str_len, b->versions[0].mode);
1201 }
1202
1203 static int tecmp1 (const void *_a, const void *_b)
1204 {
1205 struct tree_entry *a = *((struct tree_entry**)_a);
1206 struct tree_entry *b = *((struct tree_entry**)_b);
1207 return base_name_compare(
1208 a->name->str_dat, a->name->str_len, a->versions[1].mode,
1209 b->name->str_dat, b->name->str_len, b->versions[1].mode);
1210 }
1211
1212 static void mktree(struct tree_content *t, int v, struct strbuf *b)
1213 {
1214 size_t maxlen = 0;
1215 unsigned int i;
1216
1217 if (!v)
1218 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0);
1219 else
1220 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1);
1221
1222 for (i = 0; i < t->entry_count; i++) {
1223 if (t->entries[i]->versions[v].mode)
1224 maxlen += t->entries[i]->name->str_len + 34;
1225 }
1226
1227 strbuf_reset(b);
1228 strbuf_grow(b, maxlen);
1229 for (i = 0; i < t->entry_count; i++) {
1230 struct tree_entry *e = t->entries[i];
1231 if (!e->versions[v].mode)
1232 continue;
1233 strbuf_addf(b, "%o %s%c", (unsigned int)e->versions[v].mode,
1234 e->name->str_dat, '\0');
1235 strbuf_add(b, e->versions[v].sha1, 20);
1236 }
1237 }
1238
1239 static void store_tree(struct tree_entry *root)
1240 {
1241 struct tree_content *t = root->tree;
1242 unsigned int i, j, del;
1243 struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 };
1244 struct object_entry *le;
1245
1246 if (!is_null_sha1(root->versions[1].sha1))
1247 return;
1248
1249 for (i = 0; i < t->entry_count; i++) {
1250 if (t->entries[i]->tree)
1251 store_tree(t->entries[i]);
1252 }
1253
1254 le = find_object(root->versions[0].sha1);
1255 if (S_ISDIR(root->versions[0].mode) && le && le->pack_id == pack_id) {
1256 mktree(t, 0, &old_tree);
1257 lo.data = old_tree;
1258 lo.offset = le->offset;
1259 lo.depth = t->delta_depth;
1260 }
1261
1262 mktree(t, 1, &new_tree);
1263 store_object(OBJ_TREE, &new_tree, &lo, root->versions[1].sha1, 0);
1264
1265 t->delta_depth = lo.depth;
1266 for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
1267 struct tree_entry *e = t->entries[i];
1268 if (e->versions[1].mode) {
1269 e->versions[0].mode = e->versions[1].mode;
1270 hashcpy(e->versions[0].sha1, e->versions[1].sha1);
1271 t->entries[j++] = e;
1272 } else {
1273 release_tree_entry(e);
1274 del++;
1275 }
1276 }
1277 t->entry_count -= del;
1278 }
1279
1280 static int tree_content_set(
1281 struct tree_entry *root,
1282 const char *p,
1283 const unsigned char *sha1,
1284 const uint16_t mode,
1285 struct tree_content *subtree)
1286 {
1287 struct tree_content *t = root->tree;
1288 const char *slash1;
1289 unsigned int i, n;
1290 struct tree_entry *e;
1291
1292 slash1 = strchr(p, '/');
1293 if (slash1)
1294 n = slash1 - p;
1295 else
1296 n = strlen(p);
1297 if (!n)
1298 die("Empty path component found in input");
1299 if (!slash1 && !S_ISDIR(mode) && subtree)
1300 die("Non-directories cannot have subtrees");
1301
1302 for (i = 0; i < t->entry_count; i++) {
1303 e = t->entries[i];
1304 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1305 if (!slash1) {
1306 if (!S_ISDIR(mode)
1307 && e->versions[1].mode == mode
1308 && !hashcmp(e->versions[1].sha1, sha1))
1309 return 0;
1310 e->versions[1].mode = mode;
1311 hashcpy(e->versions[1].sha1, sha1);
1312 if (e->tree)
1313 release_tree_content_recursive(e->tree);
1314 e->tree = subtree;
1315 hashclr(root->versions[1].sha1);
1316 return 1;
1317 }
1318 if (!S_ISDIR(e->versions[1].mode)) {
1319 e->tree = new_tree_content(8);
1320 e->versions[1].mode = S_IFDIR;
1321 }
1322 if (!e->tree)
1323 load_tree(e);
1324 if (tree_content_set(e, slash1 + 1, sha1, mode, subtree)) {
1325 hashclr(root->versions[1].sha1);
1326 return 1;
1327 }
1328 return 0;
1329 }
1330 }
1331
1332 if (t->entry_count == t->entry_capacity)
1333 root->tree = t = grow_tree_content(t, t->entry_count);
1334 e = new_tree_entry();
1335 e->name = to_atom(p, n);
1336 e->versions[0].mode = 0;
1337 hashclr(e->versions[0].sha1);
1338 t->entries[t->entry_count++] = e;
1339 if (slash1) {
1340 e->tree = new_tree_content(8);
1341 e->versions[1].mode = S_IFDIR;
1342 tree_content_set(e, slash1 + 1, sha1, mode, subtree);
1343 } else {
1344 e->tree = subtree;
1345 e->versions[1].mode = mode;
1346 hashcpy(e->versions[1].sha1, sha1);
1347 }
1348 hashclr(root->versions[1].sha1);
1349 return 1;
1350 }
1351
1352 static int tree_content_remove(
1353 struct tree_entry *root,
1354 const char *p,
1355 struct tree_entry *backup_leaf)
1356 {
1357 struct tree_content *t = root->tree;
1358 const char *slash1;
1359 unsigned int i, n;
1360 struct tree_entry *e;
1361
1362 slash1 = strchr(p, '/');
1363 if (slash1)
1364 n = slash1 - p;
1365 else
1366 n = strlen(p);
1367
1368 for (i = 0; i < t->entry_count; i++) {
1369 e = t->entries[i];
1370 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1371 if (!slash1 || !S_ISDIR(e->versions[1].mode))
1372 goto del_entry;
1373 if (!e->tree)
1374 load_tree(e);
1375 if (tree_content_remove(e, slash1 + 1, backup_leaf)) {
1376 for (n = 0; n < e->tree->entry_count; n++) {
1377 if (e->tree->entries[n]->versions[1].mode) {
1378 hashclr(root->versions[1].sha1);
1379 return 1;
1380 }
1381 }
1382 backup_leaf = NULL;
1383 goto del_entry;
1384 }
1385 return 0;
1386 }
1387 }
1388 return 0;
1389
1390 del_entry:
1391 if (backup_leaf)
1392 memcpy(backup_leaf, e, sizeof(*backup_leaf));
1393 else if (e->tree)
1394 release_tree_content_recursive(e->tree);
1395 e->tree = NULL;
1396 e->versions[1].mode = 0;
1397 hashclr(e->versions[1].sha1);
1398 hashclr(root->versions[1].sha1);
1399 return 1;
1400 }
1401
1402 static int tree_content_get(
1403 struct tree_entry *root,
1404 const char *p,
1405 struct tree_entry *leaf)
1406 {
1407 struct tree_content *t = root->tree;
1408 const char *slash1;
1409 unsigned int i, n;
1410 struct tree_entry *e;
1411
1412 slash1 = strchr(p, '/');
1413 if (slash1)
1414 n = slash1 - p;
1415 else
1416 n = strlen(p);
1417
1418 for (i = 0; i < t->entry_count; i++) {
1419 e = t->entries[i];
1420 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1421 if (!slash1) {
1422 memcpy(leaf, e, sizeof(*leaf));
1423 if (e->tree && is_null_sha1(e->versions[1].sha1))
1424 leaf->tree = dup_tree_content(e->tree);
1425 else
1426 leaf->tree = NULL;
1427 return 1;
1428 }
1429 if (!S_ISDIR(e->versions[1].mode))
1430 return 0;
1431 if (!e->tree)
1432 load_tree(e);
1433 return tree_content_get(e, slash1 + 1, leaf);
1434 }
1435 }
1436 return 0;
1437 }
1438
1439 static int update_branch(struct branch *b)
1440 {
1441 static const char *msg = "fast-import";
1442 struct ref_lock *lock;
1443 unsigned char old_sha1[20];
1444
1445 if (read_ref(b->name, old_sha1))
1446 hashclr(old_sha1);
1447 lock = lock_any_ref_for_update(b->name, old_sha1, 0);
1448 if (!lock)
1449 return error("Unable to lock %s", b->name);
1450 if (!force_update && !is_null_sha1(old_sha1)) {
1451 struct commit *old_cmit, *new_cmit;
1452
1453 old_cmit = lookup_commit_reference_gently(old_sha1, 0);
1454 new_cmit = lookup_commit_reference_gently(b->sha1, 0);
1455 if (!old_cmit || !new_cmit) {
1456 unlock_ref(lock);
1457 return error("Branch %s is missing commits.", b->name);
1458 }
1459
1460 if (!in_merge_bases(old_cmit, &new_cmit, 1)) {
1461 unlock_ref(lock);
1462 warning("Not updating %s"
1463 " (new tip %s does not contain %s)",
1464 b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
1465 return -1;
1466 }
1467 }
1468 if (write_ref_sha1(lock, b->sha1, msg) < 0)
1469 return error("Unable to update %s", b->name);
1470 return 0;
1471 }
1472
1473 static void dump_branches(void)
1474 {
1475 unsigned int i;
1476 struct branch *b;
1477
1478 for (i = 0; i < branch_table_sz; i++) {
1479 for (b = branch_table[i]; b; b = b->table_next_branch)
1480 failure |= update_branch(b);
1481 }
1482 }
1483
1484 static void dump_tags(void)
1485 {
1486 static const char *msg = "fast-import";
1487 struct tag *t;
1488 struct ref_lock *lock;
1489 char ref_name[PATH_MAX];
1490
1491 for (t = first_tag; t; t = t->next_tag) {
1492 sprintf(ref_name, "tags/%s", t->name);
1493 lock = lock_ref_sha1(ref_name, NULL);
1494 if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0)
1495 failure |= error("Unable to update %s", ref_name);
1496 }
1497 }
1498
1499 static void dump_marks_helper(FILE *f,
1500 uintmax_t base,
1501 struct mark_set *m)
1502 {
1503 uintmax_t k;
1504 if (m->shift) {
1505 for (k = 0; k < 1024; k++) {
1506 if (m->data.sets[k])
1507 dump_marks_helper(f, (base + k) << m->shift,
1508 m->data.sets[k]);
1509 }
1510 } else {
1511 for (k = 0; k < 1024; k++) {
1512 if (m->data.marked[k])
1513 fprintf(f, ":%" PRIuMAX " %s\n", base + k,
1514 sha1_to_hex(m->data.marked[k]->sha1));
1515 }
1516 }
1517 }
1518
1519 static void dump_marks(void)
1520 {
1521 static struct lock_file mark_lock;
1522 int mark_fd;
1523 FILE *f;
1524
1525 if (!mark_file)
1526 return;
1527
1528 mark_fd = hold_lock_file_for_update(&mark_lock, mark_file, 0);
1529 if (mark_fd < 0) {
1530 failure |= error("Unable to write marks file %s: %s",
1531 mark_file, strerror(errno));
1532 return;
1533 }
1534
1535 f = fdopen(mark_fd, "w");
1536 if (!f) {
1537 rollback_lock_file(&mark_lock);
1538 failure |= error("Unable to write marks file %s: %s",
1539 mark_file, strerror(errno));
1540 return;
1541 }
1542
1543 dump_marks_helper(f, 0, marks);
1544 fclose(f);
1545 if (commit_lock_file(&mark_lock))
1546 failure |= error("Unable to write marks file %s: %s",
1547 mark_file, strerror(errno));
1548 }
1549
1550 static int read_next_command(void)
1551 {
1552 static int stdin_eof = 0;
1553
1554 if (stdin_eof) {
1555 unread_command_buf = 0;
1556 return EOF;
1557 }
1558
1559 do {
1560 if (unread_command_buf) {
1561 unread_command_buf = 0;
1562 } else {
1563 struct recent_command *rc;
1564
1565 strbuf_detach(&command_buf, NULL);
1566 stdin_eof = strbuf_getline(&command_buf, stdin, '\n');
1567 if (stdin_eof)
1568 return EOF;
1569
1570 rc = rc_free;
1571 if (rc)
1572 rc_free = rc->next;
1573 else {
1574 rc = cmd_hist.next;
1575 cmd_hist.next = rc->next;
1576 cmd_hist.next->prev = &cmd_hist;
1577 free(rc->buf);
1578 }
1579
1580 rc->buf = command_buf.buf;
1581 rc->prev = cmd_tail;
1582 rc->next = cmd_hist.prev;
1583 rc->prev->next = rc;
1584 cmd_tail = rc;
1585 }
1586 } while (command_buf.buf[0] == '#');
1587
1588 return 0;
1589 }
1590
1591 static void skip_optional_lf(void)
1592 {
1593 int term_char = fgetc(stdin);
1594 if (term_char != '\n' && term_char != EOF)
1595 ungetc(term_char, stdin);
1596 }
1597
1598 static void cmd_mark(void)
1599 {
1600 if (!prefixcmp(command_buf.buf, "mark :")) {
1601 next_mark = strtoumax(command_buf.buf + 6, NULL, 10);
1602 read_next_command();
1603 }
1604 else
1605 next_mark = 0;
1606 }
1607
1608 static void cmd_data(struct strbuf *sb)
1609 {
1610 strbuf_reset(sb);
1611
1612 if (prefixcmp(command_buf.buf, "data "))
1613 die("Expected 'data n' command, found: %s", command_buf.buf);
1614
1615 if (!prefixcmp(command_buf.buf + 5, "<<")) {
1616 char *term = xstrdup(command_buf.buf + 5 + 2);
1617 size_t term_len = command_buf.len - 5 - 2;
1618
1619 strbuf_detach(&command_buf, NULL);
1620 for (;;) {
1621 if (strbuf_getline(&command_buf, stdin, '\n') == EOF)
1622 die("EOF in data (terminator '%s' not found)", term);
1623 if (term_len == command_buf.len
1624 && !strcmp(term, command_buf.buf))
1625 break;
1626 strbuf_addbuf(sb, &command_buf);
1627 strbuf_addch(sb, '\n');
1628 }
1629 free(term);
1630 }
1631 else {
1632 size_t n = 0, length;
1633
1634 length = strtoul(command_buf.buf + 5, NULL, 10);
1635
1636 while (n < length) {
1637 size_t s = strbuf_fread(sb, length - n, stdin);
1638 if (!s && feof(stdin))
1639 die("EOF in data (%lu bytes remaining)",
1640 (unsigned long)(length - n));
1641 n += s;
1642 }
1643 }
1644
1645 skip_optional_lf();
1646 }
1647
1648 static int validate_raw_date(const char *src, char *result, int maxlen)
1649 {
1650 const char *orig_src = src;
1651 char *endp, sign;
1652
1653 strtoul(src, &endp, 10);
1654 if (endp == src || *endp != ' ')
1655 return -1;
1656
1657 src = endp + 1;
1658 if (*src != '-' && *src != '+')
1659 return -1;
1660 sign = *src;
1661
1662 strtoul(src + 1, &endp, 10);
1663 if (endp == src || *endp || (endp - orig_src) >= maxlen)
1664 return -1;
1665
1666 strcpy(result, orig_src);
1667 return 0;
1668 }
1669
1670 static char *parse_ident(const char *buf)
1671 {
1672 const char *gt;
1673 size_t name_len;
1674 char *ident;
1675
1676 gt = strrchr(buf, '>');
1677 if (!gt)
1678 die("Missing > in ident string: %s", buf);
1679 gt++;
1680 if (*gt != ' ')
1681 die("Missing space after > in ident string: %s", buf);
1682 gt++;
1683 name_len = gt - buf;
1684 ident = xmalloc(name_len + 24);
1685 strncpy(ident, buf, name_len);
1686
1687 switch (whenspec) {
1688 case WHENSPEC_RAW:
1689 if (validate_raw_date(gt, ident + name_len, 24) < 0)
1690 die("Invalid raw date \"%s\" in ident: %s", gt, buf);
1691 break;
1692 case WHENSPEC_RFC2822:
1693 if (parse_date(gt, ident + name_len, 24) < 0)
1694 die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf);
1695 break;
1696 case WHENSPEC_NOW:
1697 if (strcmp("now", gt))
1698 die("Date in ident must be 'now': %s", buf);
1699 datestamp(ident + name_len, 24);
1700 break;
1701 }
1702
1703 return ident;
1704 }
1705
1706 static void cmd_new_blob(void)
1707 {
1708 static struct strbuf buf = STRBUF_INIT;
1709
1710 read_next_command();
1711 cmd_mark();
1712 cmd_data(&buf);
1713 store_object(OBJ_BLOB, &buf, &last_blob, NULL, next_mark);
1714 }
1715
1716 static void unload_one_branch(void)
1717 {
1718 while (cur_active_branches
1719 && cur_active_branches >= max_active_branches) {
1720 uintmax_t min_commit = ULONG_MAX;
1721 struct branch *e, *l = NULL, *p = NULL;
1722
1723 for (e = active_branches; e; e = e->active_next_branch) {
1724 if (e->last_commit < min_commit) {
1725 p = l;
1726 min_commit = e->last_commit;
1727 }
1728 l = e;
1729 }
1730
1731 if (p) {
1732 e = p->active_next_branch;
1733 p->active_next_branch = e->active_next_branch;
1734 } else {
1735 e = active_branches;
1736 active_branches = e->active_next_branch;
1737 }
1738 e->active = 0;
1739 e->active_next_branch = NULL;
1740 if (e->branch_tree.tree) {
1741 release_tree_content_recursive(e->branch_tree.tree);
1742 e->branch_tree.tree = NULL;
1743 }
1744 cur_active_branches--;
1745 }
1746 }
1747
1748 static void load_branch(struct branch *b)
1749 {
1750 load_tree(&b->branch_tree);
1751 if (!b->active) {
1752 b->active = 1;
1753 b->active_next_branch = active_branches;
1754 active_branches = b;
1755 cur_active_branches++;
1756 branch_load_count++;
1757 }
1758 }
1759
1760 static void file_change_m(struct branch *b)
1761 {
1762 const char *p = command_buf.buf + 2;
1763 static struct strbuf uq = STRBUF_INIT;
1764 const char *endp;
1765 struct object_entry *oe = oe;
1766 unsigned char sha1[20];
1767 uint16_t mode, inline_data = 0;
1768
1769 p = get_mode(p, &mode);
1770 if (!p)
1771 die("Corrupt mode: %s", command_buf.buf);
1772 switch (mode) {
1773 case S_IFREG | 0644:
1774 case S_IFREG | 0755:
1775 case S_IFLNK:
1776 case 0644:
1777 case 0755:
1778 /* ok */
1779 break;
1780 default:
1781 die("Corrupt mode: %s", command_buf.buf);
1782 }
1783
1784 if (*p == ':') {
1785 char *x;
1786 oe = find_mark(strtoumax(p + 1, &x, 10));
1787 hashcpy(sha1, oe->sha1);
1788 p = x;
1789 } else if (!prefixcmp(p, "inline")) {
1790 inline_data = 1;
1791 p += 6;
1792 } else {
1793 if (get_sha1_hex(p, sha1))
1794 die("Invalid SHA1: %s", command_buf.buf);
1795 oe = find_object(sha1);
1796 p += 40;
1797 }
1798 if (*p++ != ' ')
1799 die("Missing space after SHA1: %s", command_buf.buf);
1800
1801 strbuf_reset(&uq);
1802 if (!unquote_c_style(&uq, p, &endp)) {
1803 if (*endp)
1804 die("Garbage after path in: %s", command_buf.buf);
1805 p = uq.buf;
1806 }
1807
1808 if (inline_data) {
1809 static struct strbuf buf = STRBUF_INIT;
1810
1811 if (p != uq.buf) {
1812 strbuf_addstr(&uq, p);
1813 p = uq.buf;
1814 }
1815 read_next_command();
1816 cmd_data(&buf);
1817 store_object(OBJ_BLOB, &buf, &last_blob, sha1, 0);
1818 } else if (oe) {
1819 if (oe->type != OBJ_BLOB)
1820 die("Not a blob (actually a %s): %s",
1821 typename(oe->type), command_buf.buf);
1822 } else {
1823 enum object_type type = sha1_object_info(sha1, NULL);
1824 if (type < 0)
1825 die("Blob not found: %s", command_buf.buf);
1826 if (type != OBJ_BLOB)
1827 die("Not a blob (actually a %s): %s",
1828 typename(type), command_buf.buf);
1829 }
1830
1831 tree_content_set(&b->branch_tree, p, sha1, S_IFREG | mode, NULL);
1832 }
1833
1834 static void file_change_d(struct branch *b)
1835 {
1836 const char *p = command_buf.buf + 2;
1837 static struct strbuf uq = STRBUF_INIT;
1838 const char *endp;
1839
1840 strbuf_reset(&uq);
1841 if (!unquote_c_style(&uq, p, &endp)) {
1842 if (*endp)
1843 die("Garbage after path in: %s", command_buf.buf);
1844 p = uq.buf;
1845 }
1846 tree_content_remove(&b->branch_tree, p, NULL);
1847 }
1848
1849 static void file_change_cr(struct branch *b, int rename)
1850 {
1851 const char *s, *d;
1852 static struct strbuf s_uq = STRBUF_INIT;
1853 static struct strbuf d_uq = STRBUF_INIT;
1854 const char *endp;
1855 struct tree_entry leaf;
1856
1857 s = command_buf.buf + 2;
1858 strbuf_reset(&s_uq);
1859 if (!unquote_c_style(&s_uq, s, &endp)) {
1860 if (*endp != ' ')
1861 die("Missing space after source: %s", command_buf.buf);
1862 } else {
1863 endp = strchr(s, ' ');
1864 if (!endp)
1865 die("Missing space after source: %s", command_buf.buf);
1866 strbuf_add(&s_uq, s, endp - s);
1867 }
1868 s = s_uq.buf;
1869
1870 endp++;
1871 if (!*endp)
1872 die("Missing dest: %s", command_buf.buf);
1873
1874 d = endp;
1875 strbuf_reset(&d_uq);
1876 if (!unquote_c_style(&d_uq, d, &endp)) {
1877 if (*endp)
1878 die("Garbage after dest in: %s", command_buf.buf);
1879 d = d_uq.buf;
1880 }
1881
1882 memset(&leaf, 0, sizeof(leaf));
1883 if (rename)
1884 tree_content_remove(&b->branch_tree, s, &leaf);
1885 else
1886 tree_content_get(&b->branch_tree, s, &leaf);
1887 if (!leaf.versions[1].mode)
1888 die("Path %s not in branch", s);
1889 tree_content_set(&b->branch_tree, d,
1890 leaf.versions[1].sha1,
1891 leaf.versions[1].mode,
1892 leaf.tree);
1893 }
1894
1895 static void file_change_deleteall(struct branch *b)
1896 {
1897 release_tree_content_recursive(b->branch_tree.tree);
1898 hashclr(b->branch_tree.versions[0].sha1);
1899 hashclr(b->branch_tree.versions[1].sha1);
1900 load_tree(&b->branch_tree);
1901 }
1902
1903 static void cmd_from_commit(struct branch *b, char *buf, unsigned long size)
1904 {
1905 if (!buf || size < 46)
1906 die("Not a valid commit: %s", sha1_to_hex(b->sha1));
1907 if (memcmp("tree ", buf, 5)
1908 || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
1909 die("The commit %s is corrupt", sha1_to_hex(b->sha1));
1910 hashcpy(b->branch_tree.versions[0].sha1,
1911 b->branch_tree.versions[1].sha1);
1912 }
1913
1914 static void cmd_from_existing(struct branch *b)
1915 {
1916 if (is_null_sha1(b->sha1)) {
1917 hashclr(b->branch_tree.versions[0].sha1);
1918 hashclr(b->branch_tree.versions[1].sha1);
1919 } else {
1920 unsigned long size;
1921 char *buf;
1922
1923 buf = read_object_with_reference(b->sha1,
1924 commit_type, &size, b->sha1);
1925 cmd_from_commit(b, buf, size);
1926 free(buf);
1927 }
1928 }
1929
1930 static int cmd_from(struct branch *b)
1931 {
1932 const char *from;
1933 struct branch *s;
1934
1935 if (prefixcmp(command_buf.buf, "from "))
1936 return 0;
1937
1938 if (b->branch_tree.tree) {
1939 release_tree_content_recursive(b->branch_tree.tree);
1940 b->branch_tree.tree = NULL;
1941 }
1942
1943 from = strchr(command_buf.buf, ' ') + 1;
1944 s = lookup_branch(from);
1945 if (b == s)
1946 die("Can't create a branch from itself: %s", b->name);
1947 else if (s) {
1948 unsigned char *t = s->branch_tree.versions[1].sha1;
1949 hashcpy(b->sha1, s->sha1);
1950 hashcpy(b->branch_tree.versions[0].sha1, t);
1951 hashcpy(b->branch_tree.versions[1].sha1, t);
1952 } else if (*from == ':') {
1953 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1954 struct object_entry *oe = find_mark(idnum);
1955 if (oe->type != OBJ_COMMIT)
1956 die("Mark :%" PRIuMAX " not a commit", idnum);
1957 hashcpy(b->sha1, oe->sha1);
1958 if (oe->pack_id != MAX_PACK_ID) {
1959 unsigned long size;
1960 char *buf = gfi_unpack_entry(oe, &size);
1961 cmd_from_commit(b, buf, size);
1962 free(buf);
1963 } else
1964 cmd_from_existing(b);
1965 } else if (!get_sha1(from, b->sha1))
1966 cmd_from_existing(b);
1967 else
1968 die("Invalid ref name or SHA1 expression: %s", from);
1969
1970 read_next_command();
1971 return 1;
1972 }
1973
1974 static struct hash_list *cmd_merge(unsigned int *count)
1975 {
1976 struct hash_list *list = NULL, *n, *e = e;
1977 const char *from;
1978 struct branch *s;
1979
1980 *count = 0;
1981 while (!prefixcmp(command_buf.buf, "merge ")) {
1982 from = strchr(command_buf.buf, ' ') + 1;
1983 n = xmalloc(sizeof(*n));
1984 s = lookup_branch(from);
1985 if (s)
1986 hashcpy(n->sha1, s->sha1);
1987 else if (*from == ':') {
1988 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1989 struct object_entry *oe = find_mark(idnum);
1990 if (oe->type != OBJ_COMMIT)
1991 die("Mark :%" PRIuMAX " not a commit", idnum);
1992 hashcpy(n->sha1, oe->sha1);
1993 } else if (!get_sha1(from, n->sha1)) {
1994 unsigned long size;
1995 char *buf = read_object_with_reference(n->sha1,
1996 commit_type, &size, n->sha1);
1997 if (!buf || size < 46)
1998 die("Not a valid commit: %s", from);
1999 free(buf);
2000 } else
2001 die("Invalid ref name or SHA1 expression: %s", from);
2002
2003 n->next = NULL;
2004 if (list)
2005 e->next = n;
2006 else
2007 list = n;
2008 e = n;
2009 (*count)++;
2010 read_next_command();
2011 }
2012 return list;
2013 }
2014
2015 static void cmd_new_commit(void)
2016 {
2017 static struct strbuf msg = STRBUF_INIT;
2018 struct branch *b;
2019 char *sp;
2020 char *author = NULL;
2021 char *committer = NULL;
2022 struct hash_list *merge_list = NULL;
2023 unsigned int merge_count;
2024
2025 /* Obtain the branch name from the rest of our command */
2026 sp = strchr(command_buf.buf, ' ') + 1;
2027 b = lookup_branch(sp);
2028 if (!b)
2029 b = new_branch(sp);
2030
2031 read_next_command();
2032 cmd_mark();
2033 if (!prefixcmp(command_buf.buf, "author ")) {
2034 author = parse_ident(command_buf.buf + 7);
2035 read_next_command();
2036 }
2037 if (!prefixcmp(command_buf.buf, "committer ")) {
2038 committer = parse_ident(command_buf.buf + 10);
2039 read_next_command();
2040 }
2041 if (!committer)
2042 die("Expected committer but didn't get one");
2043 cmd_data(&msg);
2044 read_next_command();
2045 cmd_from(b);
2046 merge_list = cmd_merge(&merge_count);
2047
2048 /* ensure the branch is active/loaded */
2049 if (!b->branch_tree.tree || !max_active_branches) {
2050 unload_one_branch();
2051 load_branch(b);
2052 }
2053
2054 /* file_change* */
2055 while (command_buf.len > 0) {
2056 if (!prefixcmp(command_buf.buf, "M "))
2057 file_change_m(b);
2058 else if (!prefixcmp(command_buf.buf, "D "))
2059 file_change_d(b);
2060 else if (!prefixcmp(command_buf.buf, "R "))
2061 file_change_cr(b, 1);
2062 else if (!prefixcmp(command_buf.buf, "C "))
2063 file_change_cr(b, 0);
2064 else if (!strcmp("deleteall", command_buf.buf))
2065 file_change_deleteall(b);
2066 else {
2067 unread_command_buf = 1;
2068 break;
2069 }
2070 if (read_next_command() == EOF)
2071 break;
2072 }
2073
2074 /* build the tree and the commit */
2075 store_tree(&b->branch_tree);
2076 hashcpy(b->branch_tree.versions[0].sha1,
2077 b->branch_tree.versions[1].sha1);
2078
2079 strbuf_reset(&new_data);
2080 strbuf_addf(&new_data, "tree %s\n",
2081 sha1_to_hex(b->branch_tree.versions[1].sha1));
2082 if (!is_null_sha1(b->sha1))
2083 strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(b->sha1));
2084 while (merge_list) {
2085 struct hash_list *next = merge_list->next;
2086 strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(merge_list->sha1));
2087 free(merge_list);
2088 merge_list = next;
2089 }
2090 strbuf_addf(&new_data,
2091 "author %s\n"
2092 "committer %s\n"
2093 "\n",
2094 author ? author : committer, committer);
2095 strbuf_addbuf(&new_data, &msg);
2096 free(author);
2097 free(committer);
2098
2099 if (!store_object(OBJ_COMMIT, &new_data, NULL, b->sha1, next_mark))
2100 b->pack_id = pack_id;
2101 b->last_commit = object_count_by_type[OBJ_COMMIT];
2102 }
2103
2104 static void cmd_new_tag(void)
2105 {
2106 static struct strbuf msg = STRBUF_INIT;
2107 char *sp;
2108 const char *from;
2109 char *tagger;
2110 struct branch *s;
2111 struct tag *t;
2112 uintmax_t from_mark = 0;
2113 unsigned char sha1[20];
2114
2115 /* Obtain the new tag name from the rest of our command */
2116 sp = strchr(command_buf.buf, ' ') + 1;
2117 t = pool_alloc(sizeof(struct tag));
2118 t->next_tag = NULL;
2119 t->name = pool_strdup(sp);
2120 if (last_tag)
2121 last_tag->next_tag = t;
2122 else
2123 first_tag = t;
2124 last_tag = t;
2125 read_next_command();
2126
2127 /* from ... */
2128 if (prefixcmp(command_buf.buf, "from "))
2129 die("Expected from command, got %s", command_buf.buf);
2130 from = strchr(command_buf.buf, ' ') + 1;
2131 s = lookup_branch(from);
2132 if (s) {
2133 hashcpy(sha1, s->sha1);
2134 } else if (*from == ':') {
2135 struct object_entry *oe;
2136 from_mark = strtoumax(from + 1, NULL, 10);
2137 oe = find_mark(from_mark);
2138 if (oe->type != OBJ_COMMIT)
2139 die("Mark :%" PRIuMAX " not a commit", from_mark);
2140 hashcpy(sha1, oe->sha1);
2141 } else if (!get_sha1(from, sha1)) {
2142 unsigned long size;
2143 char *buf;
2144
2145 buf = read_object_with_reference(sha1,
2146 commit_type, &size, sha1);
2147 if (!buf || size < 46)
2148 die("Not a valid commit: %s", from);
2149 free(buf);
2150 } else
2151 die("Invalid ref name or SHA1 expression: %s", from);
2152 read_next_command();
2153
2154 /* tagger ... */
2155 if (prefixcmp(command_buf.buf, "tagger "))
2156 die("Expected tagger command, got %s", command_buf.buf);
2157 tagger = parse_ident(command_buf.buf + 7);
2158
2159 /* tag payload/message */
2160 read_next_command();
2161 cmd_data(&msg);
2162
2163 /* build the tag object */
2164 strbuf_reset(&new_data);
2165 strbuf_addf(&new_data,
2166 "object %s\n"
2167 "type %s\n"
2168 "tag %s\n"
2169 "tagger %s\n"
2170 "\n",
2171 sha1_to_hex(sha1), commit_type, t->name, tagger);
2172 strbuf_addbuf(&new_data, &msg);
2173 free(tagger);
2174
2175 if (store_object(OBJ_TAG, &new_data, NULL, t->sha1, 0))
2176 t->pack_id = MAX_PACK_ID;
2177 else
2178 t->pack_id = pack_id;
2179 }
2180
2181 static void cmd_reset_branch(void)
2182 {
2183 struct branch *b;
2184 char *sp;
2185
2186 /* Obtain the branch name from the rest of our command */
2187 sp = strchr(command_buf.buf, ' ') + 1;
2188 b = lookup_branch(sp);
2189 if (b) {
2190 hashclr(b->sha1);
2191 hashclr(b->branch_tree.versions[0].sha1);
2192 hashclr(b->branch_tree.versions[1].sha1);
2193 if (b->branch_tree.tree) {
2194 release_tree_content_recursive(b->branch_tree.tree);
2195 b->branch_tree.tree = NULL;
2196 }
2197 }
2198 else
2199 b = new_branch(sp);
2200 read_next_command();
2201 if (!cmd_from(b) && command_buf.len > 0)
2202 unread_command_buf = 1;
2203 }
2204
2205 static void cmd_checkpoint(void)
2206 {
2207 if (object_count) {
2208 cycle_packfile();
2209 dump_branches();
2210 dump_tags();
2211 dump_marks();
2212 }
2213 skip_optional_lf();
2214 }
2215
2216 static void cmd_progress(void)
2217 {
2218 fwrite(command_buf.buf, 1, command_buf.len, stdout);
2219 fputc('\n', stdout);
2220 fflush(stdout);
2221 skip_optional_lf();
2222 }
2223
2224 static void import_marks(const char *input_file)
2225 {
2226 char line[512];
2227 FILE *f = fopen(input_file, "r");
2228 if (!f)
2229 die("cannot read %s: %s", input_file, strerror(errno));
2230 while (fgets(line, sizeof(line), f)) {
2231 uintmax_t mark;
2232 char *end;
2233 unsigned char sha1[20];
2234 struct object_entry *e;
2235
2236 end = strchr(line, '\n');
2237 if (line[0] != ':' || !end)
2238 die("corrupt mark line: %s", line);
2239 *end = 0;
2240 mark = strtoumax(line + 1, &end, 10);
2241 if (!mark || end == line + 1
2242 || *end != ' ' || get_sha1(end + 1, sha1))
2243 die("corrupt mark line: %s", line);
2244 e = find_object(sha1);
2245 if (!e) {
2246 enum object_type type = sha1_object_info(sha1, NULL);
2247 if (type < 0)
2248 die("object not found: %s", sha1_to_hex(sha1));
2249 e = insert_object(sha1);
2250 e->type = type;
2251 e->pack_id = MAX_PACK_ID;
2252 e->offset = 1; /* just not zero! */
2253 }
2254 insert_mark(mark, e);
2255 }
2256 fclose(f);
2257 }
2258
2259 static const char fast_import_usage[] =
2260 "git-fast-import [--date-format=f] [--max-pack-size=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file]";
2261
2262 int main(int argc, const char **argv)
2263 {
2264 unsigned int i, show_stats = 1;
2265
2266 git_config(git_default_config);
2267 alloc_objects(object_entry_alloc);
2268 strbuf_init(&command_buf, 0);
2269 atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
2270 branch_table = xcalloc(branch_table_sz, sizeof(struct branch*));
2271 avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*));
2272 marks = pool_calloc(1, sizeof(struct mark_set));
2273
2274 for (i = 1; i < argc; i++) {
2275 const char *a = argv[i];
2276
2277 if (*a != '-' || !strcmp(a, "--"))
2278 break;
2279 else if (!prefixcmp(a, "--date-format=")) {
2280 const char *fmt = a + 14;
2281 if (!strcmp(fmt, "raw"))
2282 whenspec = WHENSPEC_RAW;
2283 else if (!strcmp(fmt, "rfc2822"))
2284 whenspec = WHENSPEC_RFC2822;
2285 else if (!strcmp(fmt, "now"))
2286 whenspec = WHENSPEC_NOW;
2287 else
2288 die("unknown --date-format argument %s", fmt);
2289 }
2290 else if (!prefixcmp(a, "--max-pack-size="))
2291 max_packsize = strtoumax(a + 16, NULL, 0) * 1024 * 1024;
2292 else if (!prefixcmp(a, "--depth="))
2293 max_depth = strtoul(a + 8, NULL, 0);
2294 else if (!prefixcmp(a, "--active-branches="))
2295 max_active_branches = strtoul(a + 18, NULL, 0);
2296 else if (!prefixcmp(a, "--import-marks="))
2297 import_marks(a + 15);
2298 else if (!prefixcmp(a, "--export-marks="))
2299 mark_file = a + 15;
2300 else if (!prefixcmp(a, "--export-pack-edges=")) {
2301 if (pack_edges)
2302 fclose(pack_edges);
2303 pack_edges = fopen(a + 20, "a");
2304 if (!pack_edges)
2305 die("Cannot open %s: %s", a + 20, strerror(errno));
2306 } else if (!strcmp(a, "--force"))
2307 force_update = 1;
2308 else if (!strcmp(a, "--quiet"))
2309 show_stats = 0;
2310 else if (!strcmp(a, "--stats"))
2311 show_stats = 1;
2312 else
2313 die("unknown option %s", a);
2314 }
2315 if (i != argc)
2316 usage(fast_import_usage);
2317
2318 rc_free = pool_alloc(cmd_save * sizeof(*rc_free));
2319 for (i = 0; i < (cmd_save - 1); i++)
2320 rc_free[i].next = &rc_free[i + 1];
2321 rc_free[cmd_save - 1].next = NULL;
2322
2323 prepare_packed_git();
2324 start_packfile();
2325 set_die_routine(die_nicely);
2326 while (read_next_command() != EOF) {
2327 if (!strcmp("blob", command_buf.buf))
2328 cmd_new_blob();
2329 else if (!prefixcmp(command_buf.buf, "commit "))
2330 cmd_new_commit();
2331 else if (!prefixcmp(command_buf.buf, "tag "))
2332 cmd_new_tag();
2333 else if (!prefixcmp(command_buf.buf, "reset "))
2334 cmd_reset_branch();
2335 else if (!strcmp("checkpoint", command_buf.buf))
2336 cmd_checkpoint();
2337 else if (!prefixcmp(command_buf.buf, "progress "))
2338 cmd_progress();
2339 else
2340 die("Unsupported command: %s", command_buf.buf);
2341 }
2342 end_packfile();
2343
2344 dump_branches();
2345 dump_tags();
2346 unkeep_all_packs();
2347 dump_marks();
2348
2349 if (pack_edges)
2350 fclose(pack_edges);
2351
2352 if (show_stats) {
2353 uintmax_t total_count = 0, duplicate_count = 0;
2354 for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++)
2355 total_count += object_count_by_type[i];
2356 for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++)
2357 duplicate_count += duplicate_count_by_type[i];
2358
2359 fprintf(stderr, "%s statistics:\n", argv[0]);
2360 fprintf(stderr, "---------------------------------------------------------------------\n");
2361 fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
2362 fprintf(stderr, "Total objects: %10" PRIuMAX " (%10" PRIuMAX " duplicates )\n", total_count, duplicate_count);
2363 fprintf(stderr, " blobs : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB]);
2364 fprintf(stderr, " trees : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE]);
2365 fprintf(stderr, " commits: %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT], delta_count_by_type[OBJ_COMMIT]);
2366 fprintf(stderr, " tags : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG], delta_count_by_type[OBJ_TAG]);
2367 fprintf(stderr, "Total branches: %10lu (%10lu loads )\n", branch_count, branch_load_count);
2368 fprintf(stderr, " marks: %10" PRIuMAX " (%10" PRIuMAX " unique )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
2369 fprintf(stderr, " atoms: %10u\n", atom_cnt);
2370 fprintf(stderr, "Memory total: %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024);
2371 fprintf(stderr, " pools: %10lu KiB\n", (unsigned long)(total_allocd/1024));
2372 fprintf(stderr, " objects: %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
2373 fprintf(stderr, "---------------------------------------------------------------------\n");
2374 pack_report();
2375 fprintf(stderr, "---------------------------------------------------------------------\n");
2376 fprintf(stderr, "\n");
2377 }
2378
2379 return failure ? 1 : 0;
2380 }
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