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Document diff.external and mergetool.<tool>.path
[git/debian.git] / fast-import.c
blob4646c056f32818549635b6ecc6b1088dc08ff469
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 #define DEPTH_BITS 13
157 #define MAX_DEPTH ((1<<DEPTH_BITS)-1)
158
159 struct object_entry
160 {
161 struct object_entry *next;
162 uint32_t offset;
163 uint32_t type : TYPE_BITS,
164 pack_id : PACK_ID_BITS,
165 depth : DEPTH_BITS;
166 unsigned char sha1[20];
167 };
168
169 struct object_entry_pool
170 {
171 struct object_entry_pool *next_pool;
172 struct object_entry *next_free;
173 struct object_entry *end;
174 struct object_entry entries[FLEX_ARRAY]; /* more */
175 };
176
177 struct mark_set
178 {
179 union {
180 struct object_entry *marked[1024];
181 struct mark_set *sets[1024];
182 } data;
183 unsigned int shift;
184 };
185
186 struct last_object
187 {
188 struct strbuf data;
189 uint32_t offset;
190 unsigned int depth;
191 unsigned no_swap : 1;
192 };
193
194 struct mem_pool
195 {
196 struct mem_pool *next_pool;
197 char *next_free;
198 char *end;
199 uintmax_t space[FLEX_ARRAY]; /* more */
200 };
201
202 struct atom_str
203 {
204 struct atom_str *next_atom;
205 unsigned short str_len;
206 char str_dat[FLEX_ARRAY]; /* more */
207 };
208
209 struct tree_content;
210 struct tree_entry
211 {
212 struct tree_content *tree;
213 struct atom_str* name;
214 struct tree_entry_ms
215 {
216 uint16_t mode;
217 unsigned char sha1[20];
218 } versions[2];
219 };
220
221 struct tree_content
222 {
223 unsigned int entry_capacity; /* must match avail_tree_content */
224 unsigned int entry_count;
225 unsigned int delta_depth;
226 struct tree_entry *entries[FLEX_ARRAY]; /* more */
227 };
228
229 struct avail_tree_content
230 {
231 unsigned int entry_capacity; /* must match tree_content */
232 struct avail_tree_content *next_avail;
233 };
234
235 struct branch
236 {
237 struct branch *table_next_branch;
238 struct branch *active_next_branch;
239 const char *name;
240 struct tree_entry branch_tree;
241 uintmax_t last_commit;
242 unsigned active : 1;
243 unsigned pack_id : PACK_ID_BITS;
244 unsigned char sha1[20];
245 };
246
247 struct tag
248 {
249 struct tag *next_tag;
250 const char *name;
251 unsigned int pack_id;
252 unsigned char sha1[20];
253 };
254
255 struct hash_list
256 {
257 struct hash_list *next;
258 unsigned char sha1[20];
259 };
260
261 typedef enum {
262 WHENSPEC_RAW = 1,
263 WHENSPEC_RFC2822,
264 WHENSPEC_NOW,
265 } whenspec_type;
266
267 struct recent_command
268 {
269 struct recent_command *prev;
270 struct recent_command *next;
271 char *buf;
272 };
273
274 /* Configured limits on output */
275 static unsigned long max_depth = 10;
276 static off_t max_packsize = (1LL << 32) - 1;
277 static int force_update;
278
279 /* Stats and misc. counters */
280 static uintmax_t alloc_count;
281 static uintmax_t marks_set_count;
282 static uintmax_t object_count_by_type[1 << TYPE_BITS];
283 static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
284 static uintmax_t delta_count_by_type[1 << TYPE_BITS];
285 static unsigned long object_count;
286 static unsigned long branch_count;
287 static unsigned long branch_load_count;
288 static int failure;
289 static FILE *pack_edges;
290
291 /* Memory pools */
292 static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
293 static size_t total_allocd;
294 static struct mem_pool *mem_pool;
295
296 /* Atom management */
297 static unsigned int atom_table_sz = 4451;
298 static unsigned int atom_cnt;
299 static struct atom_str **atom_table;
300
301 /* The .pack file being generated */
302 static unsigned int pack_id;
303 static struct packed_git *pack_data;
304 static struct packed_git **all_packs;
305 static unsigned long pack_size;
306
307 /* Table of objects we've written. */
308 static unsigned int object_entry_alloc = 5000;
309 static struct object_entry_pool *blocks;
310 static struct object_entry *object_table[1 << 16];
311 static struct mark_set *marks;
312 static const char* mark_file;
313
314 /* Our last blob */
315 static struct last_object last_blob = { STRBUF_INIT, 0, 0, 0 };
316
317 /* Tree management */
318 static unsigned int tree_entry_alloc = 1000;
319 static void *avail_tree_entry;
320 static unsigned int avail_tree_table_sz = 100;
321 static struct avail_tree_content **avail_tree_table;
322 static struct strbuf old_tree = STRBUF_INIT;
323 static struct strbuf new_tree = STRBUF_INIT;
324
325 /* Branch data */
326 static unsigned long max_active_branches = 5;
327 static unsigned long cur_active_branches;
328 static unsigned long branch_table_sz = 1039;
329 static struct branch **branch_table;
330 static struct branch *active_branches;
331
332 /* Tag data */
333 static struct tag *first_tag;
334 static struct tag *last_tag;
335
336 /* Input stream parsing */
337 static whenspec_type whenspec = WHENSPEC_RAW;
338 static struct strbuf command_buf = STRBUF_INIT;
339 static int unread_command_buf;
340 static struct recent_command cmd_hist = {&cmd_hist, &cmd_hist, NULL};
341 static struct recent_command *cmd_tail = &cmd_hist;
342 static struct recent_command *rc_free;
343 static unsigned int cmd_save = 100;
344 static uintmax_t next_mark;
345 static struct strbuf new_data = STRBUF_INIT;
346
347 static void write_branch_report(FILE *rpt, struct branch *b)
348 {
349 fprintf(rpt, "%s:\n", b->name);
350
351 fprintf(rpt, " status :");
352 if (b->active)
353 fputs(" active", rpt);
354 if (b->branch_tree.tree)
355 fputs(" loaded", rpt);
356 if (is_null_sha1(b->branch_tree.versions[1].sha1))
357 fputs(" dirty", rpt);
358 fputc('\n', rpt);
359
360 fprintf(rpt, " tip commit : %s\n", sha1_to_hex(b->sha1));
361 fprintf(rpt, " old tree : %s\n", sha1_to_hex(b->branch_tree.versions[0].sha1));
362 fprintf(rpt, " cur tree : %s\n", sha1_to_hex(b->branch_tree.versions[1].sha1));
363 fprintf(rpt, " commit clock: %" PRIuMAX "\n", b->last_commit);
364
365 fputs(" last pack : ", rpt);
366 if (b->pack_id < MAX_PACK_ID)
367 fprintf(rpt, "%u", b->pack_id);
368 fputc('\n', rpt);
369
370 fputc('\n', rpt);
371 }
372
373 static void write_crash_report(const char *err)
374 {
375 char *loc = git_path("fast_import_crash_%d", getpid());
376 FILE *rpt = fopen(loc, "w");
377 struct branch *b;
378 unsigned long lu;
379 struct recent_command *rc;
380
381 if (!rpt) {
382 error("can't write crash report %s: %s", loc, strerror(errno));
383 return;
384 }
385
386 fprintf(stderr, "fast-import: dumping crash report to %s\n", loc);
387
388 fprintf(rpt, "fast-import crash report:\n");
389 fprintf(rpt, " fast-import process: %d\n", getpid());
390 fprintf(rpt, " parent process : %d\n", getppid());
391 fprintf(rpt, " at %s\n", show_date(time(NULL), 0, DATE_LOCAL));
392 fputc('\n', rpt);
393
394 fputs("fatal: ", rpt);
395 fputs(err, rpt);
396 fputc('\n', rpt);
397
398 fputc('\n', rpt);
399 fputs("Most Recent Commands Before Crash\n", rpt);
400 fputs("---------------------------------\n", rpt);
401 for (rc = cmd_hist.next; rc != &cmd_hist; rc = rc->next) {
402 if (rc->next == &cmd_hist)
403 fputs("* ", rpt);
404 else
405 fputs(" ", rpt);
406 fputs(rc->buf, rpt);
407 fputc('\n', rpt);
408 }
409
410 fputc('\n', rpt);
411 fputs("Active Branch LRU\n", rpt);
412 fputs("-----------------\n", rpt);
413 fprintf(rpt, " active_branches = %lu cur, %lu max\n",
414 cur_active_branches,
415 max_active_branches);
416 fputc('\n', rpt);
417 fputs(" pos clock name\n", rpt);
418 fputs(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n", rpt);
419 for (b = active_branches, lu = 0; b; b = b->active_next_branch)
420 fprintf(rpt, " %2lu) %6" PRIuMAX" %s\n",
421 ++lu, b->last_commit, b->name);
422
423 fputc('\n', rpt);
424 fputs("Inactive Branches\n", rpt);
425 fputs("-----------------\n", rpt);
426 for (lu = 0; lu < branch_table_sz; lu++) {
427 for (b = branch_table[lu]; b; b = b->table_next_branch)
428 write_branch_report(rpt, b);
429 }
430
431 fputc('\n', rpt);
432 fputs("-------------------\n", rpt);
433 fputs("END OF CRASH REPORT\n", rpt);
434 fclose(rpt);
435 }
436
437 static NORETURN void die_nicely(const char *err, va_list params)
438 {
439 static int zombie;
440 char message[2 * PATH_MAX];
441
442 vsnprintf(message, sizeof(message), err, params);
443 fputs("fatal: ", stderr);
444 fputs(message, stderr);
445 fputc('\n', stderr);
446
447 if (!zombie) {
448 zombie = 1;
449 write_crash_report(message);
450 }
451 exit(128);
452 }
453
454 static void alloc_objects(unsigned int cnt)
455 {
456 struct object_entry_pool *b;
457
458 b = xmalloc(sizeof(struct object_entry_pool)
459 + cnt * sizeof(struct object_entry));
460 b->next_pool = blocks;
461 b->next_free = b->entries;
462 b->end = b->entries + cnt;
463 blocks = b;
464 alloc_count += cnt;
465 }
466
467 static struct object_entry *new_object(unsigned char *sha1)
468 {
469 struct object_entry *e;
470
471 if (blocks->next_free == blocks->end)
472 alloc_objects(object_entry_alloc);
473
474 e = blocks->next_free++;
475 hashcpy(e->sha1, sha1);
476 return e;
477 }
478
479 static struct object_entry *find_object(unsigned char *sha1)
480 {
481 unsigned int h = sha1[0] << 8 | sha1[1];
482 struct object_entry *e;
483 for (e = object_table[h]; e; e = e->next)
484 if (!hashcmp(sha1, e->sha1))
485 return e;
486 return NULL;
487 }
488
489 static struct object_entry *insert_object(unsigned char *sha1)
490 {
491 unsigned int h = sha1[0] << 8 | sha1[1];
492 struct object_entry *e = object_table[h];
493 struct object_entry *p = NULL;
494
495 while (e) {
496 if (!hashcmp(sha1, e->sha1))
497 return e;
498 p = e;
499 e = e->next;
500 }
501
502 e = new_object(sha1);
503 e->next = NULL;
504 e->offset = 0;
505 if (p)
506 p->next = e;
507 else
508 object_table[h] = e;
509 return e;
510 }
511
512 static unsigned int hc_str(const char *s, size_t len)
513 {
514 unsigned int r = 0;
515 while (len-- > 0)
516 r = r * 31 + *s++;
517 return r;
518 }
519
520 static void *pool_alloc(size_t len)
521 {
522 struct mem_pool *p;
523 void *r;
524
525 for (p = mem_pool; p; p = p->next_pool)
526 if ((p->end - p->next_free >= len))
527 break;
528
529 if (!p) {
530 if (len >= (mem_pool_alloc/2)) {
531 total_allocd += len;
532 return xmalloc(len);
533 }
534 total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
535 p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc);
536 p->next_pool = mem_pool;
537 p->next_free = (char *) p->space;
538 p->end = p->next_free + mem_pool_alloc;
539 mem_pool = p;
540 }
541
542 r = p->next_free;
543 /* round out to a 'uintmax_t' alignment */
544 if (len & (sizeof(uintmax_t) - 1))
545 len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
546 p->next_free += len;
547 return r;
548 }
549
550 static void *pool_calloc(size_t count, size_t size)
551 {
552 size_t len = count * size;
553 void *r = pool_alloc(len);
554 memset(r, 0, len);
555 return r;
556 }
557
558 static char *pool_strdup(const char *s)
559 {
560 char *r = pool_alloc(strlen(s) + 1);
561 strcpy(r, s);
562 return r;
563 }
564
565 static void insert_mark(uintmax_t idnum, struct object_entry *oe)
566 {
567 struct mark_set *s = marks;
568 while ((idnum >> s->shift) >= 1024) {
569 s = pool_calloc(1, sizeof(struct mark_set));
570 s->shift = marks->shift + 10;
571 s->data.sets[0] = marks;
572 marks = s;
573 }
574 while (s->shift) {
575 uintmax_t i = idnum >> s->shift;
576 idnum -= i << s->shift;
577 if (!s->data.sets[i]) {
578 s->data.sets[i] = pool_calloc(1, sizeof(struct mark_set));
579 s->data.sets[i]->shift = s->shift - 10;
580 }
581 s = s->data.sets[i];
582 }
583 if (!s->data.marked[idnum])
584 marks_set_count++;
585 s->data.marked[idnum] = oe;
586 }
587
588 static struct object_entry *find_mark(uintmax_t idnum)
589 {
590 uintmax_t orig_idnum = idnum;
591 struct mark_set *s = marks;
592 struct object_entry *oe = NULL;
593 if ((idnum >> s->shift) < 1024) {
594 while (s && s->shift) {
595 uintmax_t i = idnum >> s->shift;
596 idnum -= i << s->shift;
597 s = s->data.sets[i];
598 }
599 if (s)
600 oe = s->data.marked[idnum];
601 }
602 if (!oe)
603 die("mark :%" PRIuMAX " not declared", orig_idnum);
604 return oe;
605 }
606
607 static struct atom_str *to_atom(const char *s, unsigned short len)
608 {
609 unsigned int hc = hc_str(s, len) % atom_table_sz;
610 struct atom_str *c;
611
612 for (c = atom_table[hc]; c; c = c->next_atom)
613 if (c->str_len == len && !strncmp(s, c->str_dat, len))
614 return c;
615
616 c = pool_alloc(sizeof(struct atom_str) + len + 1);
617 c->str_len = len;
618 strncpy(c->str_dat, s, len);
619 c->str_dat[len] = 0;
620 c->next_atom = atom_table[hc];
621 atom_table[hc] = c;
622 atom_cnt++;
623 return c;
624 }
625
626 static struct branch *lookup_branch(const char *name)
627 {
628 unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
629 struct branch *b;
630
631 for (b = branch_table[hc]; b; b = b->table_next_branch)
632 if (!strcmp(name, b->name))
633 return b;
634 return NULL;
635 }
636
637 static struct branch *new_branch(const char *name)
638 {
639 unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
640 struct branch* b = lookup_branch(name);
641
642 if (b)
643 die("Invalid attempt to create duplicate branch: %s", name);
644 switch (check_ref_format(name)) {
645 case 0: break; /* its valid */
646 case -2: break; /* valid, but too few '/', allow anyway */
647 default:
648 die("Branch name doesn't conform to GIT standards: %s", name);
649 }
650
651 b = pool_calloc(1, sizeof(struct branch));
652 b->name = pool_strdup(name);
653 b->table_next_branch = branch_table[hc];
654 b->branch_tree.versions[0].mode = S_IFDIR;
655 b->branch_tree.versions[1].mode = S_IFDIR;
656 b->active = 0;
657 b->pack_id = MAX_PACK_ID;
658 branch_table[hc] = b;
659 branch_count++;
660 return b;
661 }
662
663 static unsigned int hc_entries(unsigned int cnt)
664 {
665 cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
666 return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
667 }
668
669 static struct tree_content *new_tree_content(unsigned int cnt)
670 {
671 struct avail_tree_content *f, *l = NULL;
672 struct tree_content *t;
673 unsigned int hc = hc_entries(cnt);
674
675 for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
676 if (f->entry_capacity >= cnt)
677 break;
678
679 if (f) {
680 if (l)
681 l->next_avail = f->next_avail;
682 else
683 avail_tree_table[hc] = f->next_avail;
684 } else {
685 cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
686 f = pool_alloc(sizeof(*t) + sizeof(t->entries[0]) * cnt);
687 f->entry_capacity = cnt;
688 }
689
690 t = (struct tree_content*)f;
691 t->entry_count = 0;
692 t->delta_depth = 0;
693 return t;
694 }
695
696 static void release_tree_entry(struct tree_entry *e);
697 static void release_tree_content(struct tree_content *t)
698 {
699 struct avail_tree_content *f = (struct avail_tree_content*)t;
700 unsigned int hc = hc_entries(f->entry_capacity);
701 f->next_avail = avail_tree_table[hc];
702 avail_tree_table[hc] = f;
703 }
704
705 static void release_tree_content_recursive(struct tree_content *t)
706 {
707 unsigned int i;
708 for (i = 0; i < t->entry_count; i++)
709 release_tree_entry(t->entries[i]);
710 release_tree_content(t);
711 }
712
713 static struct tree_content *grow_tree_content(
714 struct tree_content *t,
715 int amt)
716 {
717 struct tree_content *r = new_tree_content(t->entry_count + amt);
718 r->entry_count = t->entry_count;
719 r->delta_depth = t->delta_depth;
720 memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
721 release_tree_content(t);
722 return r;
723 }
724
725 static struct tree_entry *new_tree_entry(void)
726 {
727 struct tree_entry *e;
728
729 if (!avail_tree_entry) {
730 unsigned int n = tree_entry_alloc;
731 total_allocd += n * sizeof(struct tree_entry);
732 avail_tree_entry = e = xmalloc(n * sizeof(struct tree_entry));
733 while (n-- > 1) {
734 *((void**)e) = e + 1;
735 e++;
736 }
737 *((void**)e) = NULL;
738 }
739
740 e = avail_tree_entry;
741 avail_tree_entry = *((void**)e);
742 return e;
743 }
744
745 static void release_tree_entry(struct tree_entry *e)
746 {
747 if (e->tree)
748 release_tree_content_recursive(e->tree);
749 *((void**)e) = avail_tree_entry;
750 avail_tree_entry = e;
751 }
752
753 static struct tree_content *dup_tree_content(struct tree_content *s)
754 {
755 struct tree_content *d;
756 struct tree_entry *a, *b;
757 unsigned int i;
758
759 if (!s)
760 return NULL;
761 d = new_tree_content(s->entry_count);
762 for (i = 0; i < s->entry_count; i++) {
763 a = s->entries[i];
764 b = new_tree_entry();
765 memcpy(b, a, sizeof(*a));
766 if (a->tree && is_null_sha1(b->versions[1].sha1))
767 b->tree = dup_tree_content(a->tree);
768 else
769 b->tree = NULL;
770 d->entries[i] = b;
771 }
772 d->entry_count = s->entry_count;
773 d->delta_depth = s->delta_depth;
774
775 return d;
776 }
777
778 static void start_packfile(void)
779 {
780 static char tmpfile[PATH_MAX];
781 struct packed_git *p;
782 struct pack_header hdr;
783 int pack_fd;
784
785 snprintf(tmpfile, sizeof(tmpfile),
786 "%s/tmp_pack_XXXXXX", get_object_directory());
787 pack_fd = xmkstemp(tmpfile);
788 p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
789 strcpy(p->pack_name, tmpfile);
790 p->pack_fd = pack_fd;
791
792 hdr.hdr_signature = htonl(PACK_SIGNATURE);
793 hdr.hdr_version = htonl(2);
794 hdr.hdr_entries = 0;
795 write_or_die(p->pack_fd, &hdr, sizeof(hdr));
796
797 pack_data = p;
798 pack_size = sizeof(hdr);
799 object_count = 0;
800
801 all_packs = xrealloc(all_packs, sizeof(*all_packs) * (pack_id + 1));
802 all_packs[pack_id] = p;
803 }
804
805 static int oecmp (const void *a_, const void *b_)
806 {
807 struct object_entry *a = *((struct object_entry**)a_);
808 struct object_entry *b = *((struct object_entry**)b_);
809 return hashcmp(a->sha1, b->sha1);
810 }
811
812 static char *create_index(void)
813 {
814 static char tmpfile[PATH_MAX];
815 SHA_CTX ctx;
816 struct sha1file *f;
817 struct object_entry **idx, **c, **last, *e;
818 struct object_entry_pool *o;
819 uint32_t array[256];
820 int i, idx_fd;
821
822 /* Build the sorted table of object IDs. */
823 idx = xmalloc(object_count * sizeof(struct object_entry*));
824 c = idx;
825 for (o = blocks; o; o = o->next_pool)
826 for (e = o->next_free; e-- != o->entries;)
827 if (pack_id == e->pack_id)
828 *c++ = e;
829 last = idx + object_count;
830 if (c != last)
831 die("internal consistency error creating the index");
832 qsort(idx, object_count, sizeof(struct object_entry*), oecmp);
833
834 /* Generate the fan-out array. */
835 c = idx;
836 for (i = 0; i < 256; i++) {
837 struct object_entry **next = c;;
838 while (next < last) {
839 if ((*next)->sha1[0] != i)
840 break;
841 next++;
842 }
843 array[i] = htonl(next - idx);
844 c = next;
845 }
846
847 snprintf(tmpfile, sizeof(tmpfile),
848 "%s/tmp_idx_XXXXXX", get_object_directory());
849 idx_fd = xmkstemp(tmpfile);
850 f = sha1fd(idx_fd, tmpfile);
851 sha1write(f, array, 256 * sizeof(int));
852 SHA1_Init(&ctx);
853 for (c = idx; c != last; c++) {
854 uint32_t offset = htonl((*c)->offset);
855 sha1write(f, &offset, 4);
856 sha1write(f, (*c)->sha1, sizeof((*c)->sha1));
857 SHA1_Update(&ctx, (*c)->sha1, 20);
858 }
859 sha1write(f, pack_data->sha1, sizeof(pack_data->sha1));
860 sha1close(f, NULL, 1);
861 free(idx);
862 SHA1_Final(pack_data->sha1, &ctx);
863 return tmpfile;
864 }
865
866 static char *keep_pack(char *curr_index_name)
867 {
868 static char name[PATH_MAX];
869 static const char *keep_msg = "fast-import";
870 int keep_fd;
871
872 chmod(pack_data->pack_name, 0444);
873 chmod(curr_index_name, 0444);
874
875 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
876 get_object_directory(), sha1_to_hex(pack_data->sha1));
877 keep_fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
878 if (keep_fd < 0)
879 die("cannot create keep file");
880 write(keep_fd, keep_msg, strlen(keep_msg));
881 close(keep_fd);
882
883 snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
884 get_object_directory(), sha1_to_hex(pack_data->sha1));
885 if (move_temp_to_file(pack_data->pack_name, name))
886 die("cannot store pack file");
887
888 snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
889 get_object_directory(), sha1_to_hex(pack_data->sha1));
890 if (move_temp_to_file(curr_index_name, name))
891 die("cannot store index file");
892 return name;
893 }
894
895 static void unkeep_all_packs(void)
896 {
897 static char name[PATH_MAX];
898 int k;
899
900 for (k = 0; k < pack_id; k++) {
901 struct packed_git *p = all_packs[k];
902 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
903 get_object_directory(), sha1_to_hex(p->sha1));
904 unlink(name);
905 }
906 }
907
908 static void end_packfile(void)
909 {
910 struct packed_git *old_p = pack_data, *new_p;
911
912 if (object_count) {
913 char *idx_name;
914 int i;
915 struct branch *b;
916 struct tag *t;
917
918 fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
919 pack_data->pack_name, object_count);
920 close(pack_data->pack_fd);
921 idx_name = keep_pack(create_index());
922
923 /* Register the packfile with core git's machinary. */
924 new_p = add_packed_git(idx_name, strlen(idx_name), 1);
925 if (!new_p)
926 die("core git rejected index %s", idx_name);
927 new_p->windows = old_p->windows;
928 all_packs[pack_id] = new_p;
929 install_packed_git(new_p);
930
931 /* Print the boundary */
932 if (pack_edges) {
933 fprintf(pack_edges, "%s:", new_p->pack_name);
934 for (i = 0; i < branch_table_sz; i++) {
935 for (b = branch_table[i]; b; b = b->table_next_branch) {
936 if (b->pack_id == pack_id)
937 fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
938 }
939 }
940 for (t = first_tag; t; t = t->next_tag) {
941 if (t->pack_id == pack_id)
942 fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
943 }
944 fputc('\n', pack_edges);
945 fflush(pack_edges);
946 }
947
948 pack_id++;
949 }
950 else
951 unlink(old_p->pack_name);
952 free(old_p);
953
954 /* We can't carry a delta across packfiles. */
955 strbuf_release(&last_blob.data);
956 last_blob.offset = 0;
957 last_blob.depth = 0;
958 }
959
960 static void cycle_packfile(void)
961 {
962 end_packfile();
963 start_packfile();
964 }
965
966 static size_t encode_header(
967 enum object_type type,
968 size_t size,
969 unsigned char *hdr)
970 {
971 int n = 1;
972 unsigned char c;
973
974 if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
975 die("bad type %d", type);
976
977 c = (type << 4) | (size & 15);
978 size >>= 4;
979 while (size) {
980 *hdr++ = c | 0x80;
981 c = size & 0x7f;
982 size >>= 7;
983 n++;
984 }
985 *hdr = c;
986 return n;
987 }
988
989 static int store_object(
990 enum object_type type,
991 struct strbuf *dat,
992 struct last_object *last,
993 unsigned char *sha1out,
994 uintmax_t mark)
995 {
996 void *out, *delta;
997 struct object_entry *e;
998 unsigned char hdr[96];
999 unsigned char sha1[20];
1000 unsigned long hdrlen, deltalen;
1001 SHA_CTX c;
1002 z_stream s;
1003
1004 hdrlen = sprintf((char*)hdr,"%s %lu", typename(type),
1005 (unsigned long)dat->len) + 1;
1006 SHA1_Init(&c);
1007 SHA1_Update(&c, hdr, hdrlen);
1008 SHA1_Update(&c, dat->buf, dat->len);
1009 SHA1_Final(sha1, &c);
1010 if (sha1out)
1011 hashcpy(sha1out, sha1);
1012
1013 e = insert_object(sha1);
1014 if (mark)
1015 insert_mark(mark, e);
1016 if (e->offset) {
1017 duplicate_count_by_type[type]++;
1018 return 1;
1019 } else if (find_sha1_pack(sha1, packed_git)) {
1020 e->type = type;
1021 e->pack_id = MAX_PACK_ID;
1022 e->offset = 1; /* just not zero! */
1023 duplicate_count_by_type[type]++;
1024 return 1;
1025 }
1026
1027 if (last && last->data.buf && last->depth < max_depth) {
1028 delta = diff_delta(last->data.buf, last->data.len,
1029 dat->buf, dat->len,
1030 &deltalen, 0);
1031 if (delta && deltalen >= dat->len) {
1032 free(delta);
1033 delta = NULL;
1034 }
1035 } else
1036 delta = NULL;
1037
1038 memset(&s, 0, sizeof(s));
1039 deflateInit(&s, zlib_compression_level);
1040 if (delta) {
1041 s.next_in = delta;
1042 s.avail_in = deltalen;
1043 } else {
1044 s.next_in = (void *)dat->buf;
1045 s.avail_in = dat->len;
1046 }
1047 s.avail_out = deflateBound(&s, s.avail_in);
1048 s.next_out = out = xmalloc(s.avail_out);
1049 while (deflate(&s, Z_FINISH) == Z_OK)
1050 /* nothing */;
1051 deflateEnd(&s);
1052
1053 /* Determine if we should auto-checkpoint. */
1054 if ((pack_size + 60 + s.total_out) > max_packsize
1055 || (pack_size + 60 + s.total_out) < pack_size) {
1056
1057 /* This new object needs to *not* have the current pack_id. */
1058 e->pack_id = pack_id + 1;
1059 cycle_packfile();
1060
1061 /* We cannot carry a delta into the new pack. */
1062 if (delta) {
1063 free(delta);
1064 delta = NULL;
1065
1066 memset(&s, 0, sizeof(s));
1067 deflateInit(&s, zlib_compression_level);
1068 s.next_in = (void *)dat->buf;
1069 s.avail_in = dat->len;
1070 s.avail_out = deflateBound(&s, s.avail_in);
1071 s.next_out = out = xrealloc(out, s.avail_out);
1072 while (deflate(&s, Z_FINISH) == Z_OK)
1073 /* nothing */;
1074 deflateEnd(&s);
1075 }
1076 }
1077
1078 e->type = type;
1079 e->pack_id = pack_id;
1080 e->offset = pack_size;
1081 object_count++;
1082 object_count_by_type[type]++;
1083
1084 if (delta) {
1085 unsigned long ofs = e->offset - last->offset;
1086 unsigned pos = sizeof(hdr) - 1;
1087
1088 delta_count_by_type[type]++;
1089 e->depth = last->depth + 1;
1090
1091 hdrlen = encode_header(OBJ_OFS_DELTA, deltalen, hdr);
1092 write_or_die(pack_data->pack_fd, hdr, hdrlen);
1093 pack_size += hdrlen;
1094
1095 hdr[pos] = ofs & 127;
1096 while (ofs >>= 7)
1097 hdr[--pos] = 128 | (--ofs & 127);
1098 write_or_die(pack_data->pack_fd, hdr + pos, sizeof(hdr) - pos);
1099 pack_size += sizeof(hdr) - pos;
1100 } else {
1101 e->depth = 0;
1102 hdrlen = encode_header(type, dat->len, hdr);
1103 write_or_die(pack_data->pack_fd, hdr, hdrlen);
1104 pack_size += hdrlen;
1105 }
1106
1107 write_or_die(pack_data->pack_fd, out, s.total_out);
1108 pack_size += s.total_out;
1109
1110 free(out);
1111 free(delta);
1112 if (last) {
1113 if (last->no_swap) {
1114 last->data = *dat;
1115 } else {
1116 strbuf_swap(&last->data, dat);
1117 }
1118 last->offset = e->offset;
1119 last->depth = e->depth;
1120 }
1121 return 0;
1122 }
1123
1124 static void *gfi_unpack_entry(
1125 struct object_entry *oe,
1126 unsigned long *sizep)
1127 {
1128 enum object_type type;
1129 struct packed_git *p = all_packs[oe->pack_id];
1130 if (p == pack_data)
1131 p->pack_size = pack_size + 20;
1132 return unpack_entry(p, oe->offset, &type, sizep);
1133 }
1134
1135 static const char *get_mode(const char *str, uint16_t *modep)
1136 {
1137 unsigned char c;
1138 uint16_t mode = 0;
1139
1140 while ((c = *str++) != ' ') {
1141 if (c < '0' || c > '7')
1142 return NULL;
1143 mode = (mode << 3) + (c - '0');
1144 }
1145 *modep = mode;
1146 return str;
1147 }
1148
1149 static void load_tree(struct tree_entry *root)
1150 {
1151 unsigned char* sha1 = root->versions[1].sha1;
1152 struct object_entry *myoe;
1153 struct tree_content *t;
1154 unsigned long size;
1155 char *buf;
1156 const char *c;
1157
1158 root->tree = t = new_tree_content(8);
1159 if (is_null_sha1(sha1))
1160 return;
1161
1162 myoe = find_object(sha1);
1163 if (myoe && myoe->pack_id != MAX_PACK_ID) {
1164 if (myoe->type != OBJ_TREE)
1165 die("Not a tree: %s", sha1_to_hex(sha1));
1166 t->delta_depth = myoe->depth;
1167 buf = gfi_unpack_entry(myoe, &size);
1168 } else {
1169 enum object_type type;
1170 buf = read_sha1_file(sha1, &type, &size);
1171 if (!buf || type != OBJ_TREE)
1172 die("Can't load tree %s", sha1_to_hex(sha1));
1173 }
1174
1175 c = buf;
1176 while (c != (buf + size)) {
1177 struct tree_entry *e = new_tree_entry();
1178
1179 if (t->entry_count == t->entry_capacity)
1180 root->tree = t = grow_tree_content(t, t->entry_count);
1181 t->entries[t->entry_count++] = e;
1182
1183 e->tree = NULL;
1184 c = get_mode(c, &e->versions[1].mode);
1185 if (!c)
1186 die("Corrupt mode in %s", sha1_to_hex(sha1));
1187 e->versions[0].mode = e->versions[1].mode;
1188 e->name = to_atom(c, strlen(c));
1189 c += e->name->str_len + 1;
1190 hashcpy(e->versions[0].sha1, (unsigned char*)c);
1191 hashcpy(e->versions[1].sha1, (unsigned char*)c);
1192 c += 20;
1193 }
1194 free(buf);
1195 }
1196
1197 static int tecmp0 (const void *_a, const void *_b)
1198 {
1199 struct tree_entry *a = *((struct tree_entry**)_a);
1200 struct tree_entry *b = *((struct tree_entry**)_b);
1201 return base_name_compare(
1202 a->name->str_dat, a->name->str_len, a->versions[0].mode,
1203 b->name->str_dat, b->name->str_len, b->versions[0].mode);
1204 }
1205
1206 static int tecmp1 (const void *_a, const void *_b)
1207 {
1208 struct tree_entry *a = *((struct tree_entry**)_a);
1209 struct tree_entry *b = *((struct tree_entry**)_b);
1210 return base_name_compare(
1211 a->name->str_dat, a->name->str_len, a->versions[1].mode,
1212 b->name->str_dat, b->name->str_len, b->versions[1].mode);
1213 }
1214
1215 static void mktree(struct tree_content *t, int v, struct strbuf *b)
1216 {
1217 size_t maxlen = 0;
1218 unsigned int i;
1219
1220 if (!v)
1221 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0);
1222 else
1223 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1);
1224
1225 for (i = 0; i < t->entry_count; i++) {
1226 if (t->entries[i]->versions[v].mode)
1227 maxlen += t->entries[i]->name->str_len + 34;
1228 }
1229
1230 strbuf_reset(b);
1231 strbuf_grow(b, maxlen);
1232 for (i = 0; i < t->entry_count; i++) {
1233 struct tree_entry *e = t->entries[i];
1234 if (!e->versions[v].mode)
1235 continue;
1236 strbuf_addf(b, "%o %s%c", (unsigned int)e->versions[v].mode,
1237 e->name->str_dat, '\0');
1238 strbuf_add(b, e->versions[v].sha1, 20);
1239 }
1240 }
1241
1242 static void store_tree(struct tree_entry *root)
1243 {
1244 struct tree_content *t = root->tree;
1245 unsigned int i, j, del;
1246 struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 };
1247 struct object_entry *le;
1248
1249 if (!is_null_sha1(root->versions[1].sha1))
1250 return;
1251
1252 for (i = 0; i < t->entry_count; i++) {
1253 if (t->entries[i]->tree)
1254 store_tree(t->entries[i]);
1255 }
1256
1257 le = find_object(root->versions[0].sha1);
1258 if (S_ISDIR(root->versions[0].mode) && le && le->pack_id == pack_id) {
1259 mktree(t, 0, &old_tree);
1260 lo.data = old_tree;
1261 lo.offset = le->offset;
1262 lo.depth = t->delta_depth;
1263 }
1264
1265 mktree(t, 1, &new_tree);
1266 store_object(OBJ_TREE, &new_tree, &lo, root->versions[1].sha1, 0);
1267
1268 t->delta_depth = lo.depth;
1269 for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
1270 struct tree_entry *e = t->entries[i];
1271 if (e->versions[1].mode) {
1272 e->versions[0].mode = e->versions[1].mode;
1273 hashcpy(e->versions[0].sha1, e->versions[1].sha1);
1274 t->entries[j++] = e;
1275 } else {
1276 release_tree_entry(e);
1277 del++;
1278 }
1279 }
1280 t->entry_count -= del;
1281 }
1282
1283 static int tree_content_set(
1284 struct tree_entry *root,
1285 const char *p,
1286 const unsigned char *sha1,
1287 const uint16_t mode,
1288 struct tree_content *subtree)
1289 {
1290 struct tree_content *t = root->tree;
1291 const char *slash1;
1292 unsigned int i, n;
1293 struct tree_entry *e;
1294
1295 slash1 = strchr(p, '/');
1296 if (slash1)
1297 n = slash1 - p;
1298 else
1299 n = strlen(p);
1300 if (!n)
1301 die("Empty path component found in input");
1302 if (!slash1 && !S_ISDIR(mode) && subtree)
1303 die("Non-directories cannot have subtrees");
1304
1305 for (i = 0; i < t->entry_count; i++) {
1306 e = t->entries[i];
1307 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1308 if (!slash1) {
1309 if (!S_ISDIR(mode)
1310 && e->versions[1].mode == mode
1311 && !hashcmp(e->versions[1].sha1, sha1))
1312 return 0;
1313 e->versions[1].mode = mode;
1314 hashcpy(e->versions[1].sha1, sha1);
1315 if (e->tree)
1316 release_tree_content_recursive(e->tree);
1317 e->tree = subtree;
1318 hashclr(root->versions[1].sha1);
1319 return 1;
1320 }
1321 if (!S_ISDIR(e->versions[1].mode)) {
1322 e->tree = new_tree_content(8);
1323 e->versions[1].mode = S_IFDIR;
1324 }
1325 if (!e->tree)
1326 load_tree(e);
1327 if (tree_content_set(e, slash1 + 1, sha1, mode, subtree)) {
1328 hashclr(root->versions[1].sha1);
1329 return 1;
1330 }
1331 return 0;
1332 }
1333 }
1334
1335 if (t->entry_count == t->entry_capacity)
1336 root->tree = t = grow_tree_content(t, t->entry_count);
1337 e = new_tree_entry();
1338 e->name = to_atom(p, n);
1339 e->versions[0].mode = 0;
1340 hashclr(e->versions[0].sha1);
1341 t->entries[t->entry_count++] = e;
1342 if (slash1) {
1343 e->tree = new_tree_content(8);
1344 e->versions[1].mode = S_IFDIR;
1345 tree_content_set(e, slash1 + 1, sha1, mode, subtree);
1346 } else {
1347 e->tree = subtree;
1348 e->versions[1].mode = mode;
1349 hashcpy(e->versions[1].sha1, sha1);
1350 }
1351 hashclr(root->versions[1].sha1);
1352 return 1;
1353 }
1354
1355 static int tree_content_remove(
1356 struct tree_entry *root,
1357 const char *p,
1358 struct tree_entry *backup_leaf)
1359 {
1360 struct tree_content *t = root->tree;
1361 const char *slash1;
1362 unsigned int i, n;
1363 struct tree_entry *e;
1364
1365 slash1 = strchr(p, '/');
1366 if (slash1)
1367 n = slash1 - p;
1368 else
1369 n = strlen(p);
1370
1371 for (i = 0; i < t->entry_count; i++) {
1372 e = t->entries[i];
1373 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1374 if (!slash1 || !S_ISDIR(e->versions[1].mode))
1375 goto del_entry;
1376 if (!e->tree)
1377 load_tree(e);
1378 if (tree_content_remove(e, slash1 + 1, backup_leaf)) {
1379 for (n = 0; n < e->tree->entry_count; n++) {
1380 if (e->tree->entries[n]->versions[1].mode) {
1381 hashclr(root->versions[1].sha1);
1382 return 1;
1383 }
1384 }
1385 backup_leaf = NULL;
1386 goto del_entry;
1387 }
1388 return 0;
1389 }
1390 }
1391 return 0;
1392
1393 del_entry:
1394 if (backup_leaf)
1395 memcpy(backup_leaf, e, sizeof(*backup_leaf));
1396 else if (e->tree)
1397 release_tree_content_recursive(e->tree);
1398 e->tree = NULL;
1399 e->versions[1].mode = 0;
1400 hashclr(e->versions[1].sha1);
1401 hashclr(root->versions[1].sha1);
1402 return 1;
1403 }
1404
1405 static int tree_content_get(
1406 struct tree_entry *root,
1407 const char *p,
1408 struct tree_entry *leaf)
1409 {
1410 struct tree_content *t = root->tree;
1411 const char *slash1;
1412 unsigned int i, n;
1413 struct tree_entry *e;
1414
1415 slash1 = strchr(p, '/');
1416 if (slash1)
1417 n = slash1 - p;
1418 else
1419 n = strlen(p);
1420
1421 for (i = 0; i < t->entry_count; i++) {
1422 e = t->entries[i];
1423 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1424 if (!slash1) {
1425 memcpy(leaf, e, sizeof(*leaf));
1426 if (e->tree && is_null_sha1(e->versions[1].sha1))
1427 leaf->tree = dup_tree_content(e->tree);
1428 else
1429 leaf->tree = NULL;
1430 return 1;
1431 }
1432 if (!S_ISDIR(e->versions[1].mode))
1433 return 0;
1434 if (!e->tree)
1435 load_tree(e);
1436 return tree_content_get(e, slash1 + 1, leaf);
1437 }
1438 }
1439 return 0;
1440 }
1441
1442 static int update_branch(struct branch *b)
1443 {
1444 static const char *msg = "fast-import";
1445 struct ref_lock *lock;
1446 unsigned char old_sha1[20];
1447
1448 if (read_ref(b->name, old_sha1))
1449 hashclr(old_sha1);
1450 lock = lock_any_ref_for_update(b->name, old_sha1, 0);
1451 if (!lock)
1452 return error("Unable to lock %s", b->name);
1453 if (!force_update && !is_null_sha1(old_sha1)) {
1454 struct commit *old_cmit, *new_cmit;
1455
1456 old_cmit = lookup_commit_reference_gently(old_sha1, 0);
1457 new_cmit = lookup_commit_reference_gently(b->sha1, 0);
1458 if (!old_cmit || !new_cmit) {
1459 unlock_ref(lock);
1460 return error("Branch %s is missing commits.", b->name);
1461 }
1462
1463 if (!in_merge_bases(old_cmit, &new_cmit, 1)) {
1464 unlock_ref(lock);
1465 warning("Not updating %s"
1466 " (new tip %s does not contain %s)",
1467 b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
1468 return -1;
1469 }
1470 }
1471 if (write_ref_sha1(lock, b->sha1, msg) < 0)
1472 return error("Unable to update %s", b->name);
1473 return 0;
1474 }
1475
1476 static void dump_branches(void)
1477 {
1478 unsigned int i;
1479 struct branch *b;
1480
1481 for (i = 0; i < branch_table_sz; i++) {
1482 for (b = branch_table[i]; b; b = b->table_next_branch)
1483 failure |= update_branch(b);
1484 }
1485 }
1486
1487 static void dump_tags(void)
1488 {
1489 static const char *msg = "fast-import";
1490 struct tag *t;
1491 struct ref_lock *lock;
1492 char ref_name[PATH_MAX];
1493
1494 for (t = first_tag; t; t = t->next_tag) {
1495 sprintf(ref_name, "tags/%s", t->name);
1496 lock = lock_ref_sha1(ref_name, NULL);
1497 if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0)
1498 failure |= error("Unable to update %s", ref_name);
1499 }
1500 }
1501
1502 static void dump_marks_helper(FILE *f,
1503 uintmax_t base,
1504 struct mark_set *m)
1505 {
1506 uintmax_t k;
1507 if (m->shift) {
1508 for (k = 0; k < 1024; k++) {
1509 if (m->data.sets[k])
1510 dump_marks_helper(f, (base + k) << m->shift,
1511 m->data.sets[k]);
1512 }
1513 } else {
1514 for (k = 0; k < 1024; k++) {
1515 if (m->data.marked[k])
1516 fprintf(f, ":%" PRIuMAX " %s\n", base + k,
1517 sha1_to_hex(m->data.marked[k]->sha1));
1518 }
1519 }
1520 }
1521
1522 static void dump_marks(void)
1523 {
1524 static struct lock_file mark_lock;
1525 int mark_fd;
1526 FILE *f;
1527
1528 if (!mark_file)
1529 return;
1530
1531 mark_fd = hold_lock_file_for_update(&mark_lock, mark_file, 0);
1532 if (mark_fd < 0) {
1533 failure |= error("Unable to write marks file %s: %s",
1534 mark_file, strerror(errno));
1535 return;
1536 }
1537
1538 f = fdopen(mark_fd, "w");
1539 if (!f) {
1540 rollback_lock_file(&mark_lock);
1541 failure |= error("Unable to write marks file %s: %s",
1542 mark_file, strerror(errno));
1543 return;
1544 }
1545
1546 dump_marks_helper(f, 0, marks);
1547 fclose(f);
1548 if (commit_lock_file(&mark_lock))
1549 failure |= error("Unable to write marks file %s: %s",
1550 mark_file, strerror(errno));
1551 }
1552
1553 static int read_next_command(void)
1554 {
1555 static int stdin_eof = 0;
1556
1557 if (stdin_eof) {
1558 unread_command_buf = 0;
1559 return EOF;
1560 }
1561
1562 do {
1563 if (unread_command_buf) {
1564 unread_command_buf = 0;
1565 } else {
1566 struct recent_command *rc;
1567
1568 strbuf_detach(&command_buf, NULL);
1569 stdin_eof = strbuf_getline(&command_buf, stdin, '\n');
1570 if (stdin_eof)
1571 return EOF;
1572
1573 rc = rc_free;
1574 if (rc)
1575 rc_free = rc->next;
1576 else {
1577 rc = cmd_hist.next;
1578 cmd_hist.next = rc->next;
1579 cmd_hist.next->prev = &cmd_hist;
1580 free(rc->buf);
1581 }
1582
1583 rc->buf = command_buf.buf;
1584 rc->prev = cmd_tail;
1585 rc->next = cmd_hist.prev;
1586 rc->prev->next = rc;
1587 cmd_tail = rc;
1588 }
1589 } while (command_buf.buf[0] == '#');
1590
1591 return 0;
1592 }
1593
1594 static void skip_optional_lf(void)
1595 {
1596 int term_char = fgetc(stdin);
1597 if (term_char != '\n' && term_char != EOF)
1598 ungetc(term_char, stdin);
1599 }
1600
1601 static void cmd_mark(void)
1602 {
1603 if (!prefixcmp(command_buf.buf, "mark :")) {
1604 next_mark = strtoumax(command_buf.buf + 6, NULL, 10);
1605 read_next_command();
1606 }
1607 else
1608 next_mark = 0;
1609 }
1610
1611 static void cmd_data(struct strbuf *sb)
1612 {
1613 strbuf_reset(sb);
1614
1615 if (prefixcmp(command_buf.buf, "data "))
1616 die("Expected 'data n' command, found: %s", command_buf.buf);
1617
1618 if (!prefixcmp(command_buf.buf + 5, "<<")) {
1619 char *term = xstrdup(command_buf.buf + 5 + 2);
1620 size_t term_len = command_buf.len - 5 - 2;
1621
1622 strbuf_detach(&command_buf, NULL);
1623 for (;;) {
1624 if (strbuf_getline(&command_buf, stdin, '\n') == EOF)
1625 die("EOF in data (terminator '%s' not found)", term);
1626 if (term_len == command_buf.len
1627 && !strcmp(term, command_buf.buf))
1628 break;
1629 strbuf_addbuf(sb, &command_buf);
1630 strbuf_addch(sb, '\n');
1631 }
1632 free(term);
1633 }
1634 else {
1635 size_t n = 0, length;
1636
1637 length = strtoul(command_buf.buf + 5, NULL, 10);
1638
1639 while (n < length) {
1640 size_t s = strbuf_fread(sb, length - n, stdin);
1641 if (!s && feof(stdin))
1642 die("EOF in data (%lu bytes remaining)",
1643 (unsigned long)(length - n));
1644 n += s;
1645 }
1646 }
1647
1648 skip_optional_lf();
1649 }
1650
1651 static int validate_raw_date(const char *src, char *result, int maxlen)
1652 {
1653 const char *orig_src = src;
1654 char *endp, sign;
1655
1656 strtoul(src, &endp, 10);
1657 if (endp == src || *endp != ' ')
1658 return -1;
1659
1660 src = endp + 1;
1661 if (*src != '-' && *src != '+')
1662 return -1;
1663 sign = *src;
1664
1665 strtoul(src + 1, &endp, 10);
1666 if (endp == src || *endp || (endp - orig_src) >= maxlen)
1667 return -1;
1668
1669 strcpy(result, orig_src);
1670 return 0;
1671 }
1672
1673 static char *parse_ident(const char *buf)
1674 {
1675 const char *gt;
1676 size_t name_len;
1677 char *ident;
1678
1679 gt = strrchr(buf, '>');
1680 if (!gt)
1681 die("Missing > in ident string: %s", buf);
1682 gt++;
1683 if (*gt != ' ')
1684 die("Missing space after > in ident string: %s", buf);
1685 gt++;
1686 name_len = gt - buf;
1687 ident = xmalloc(name_len + 24);
1688 strncpy(ident, buf, name_len);
1689
1690 switch (whenspec) {
1691 case WHENSPEC_RAW:
1692 if (validate_raw_date(gt, ident + name_len, 24) < 0)
1693 die("Invalid raw date \"%s\" in ident: %s", gt, buf);
1694 break;
1695 case WHENSPEC_RFC2822:
1696 if (parse_date(gt, ident + name_len, 24) < 0)
1697 die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf);
1698 break;
1699 case WHENSPEC_NOW:
1700 if (strcmp("now", gt))
1701 die("Date in ident must be 'now': %s", buf);
1702 datestamp(ident + name_len, 24);
1703 break;
1704 }
1705
1706 return ident;
1707 }
1708
1709 static void cmd_new_blob(void)
1710 {
1711 static struct strbuf buf = STRBUF_INIT;
1712
1713 read_next_command();
1714 cmd_mark();
1715 cmd_data(&buf);
1716 store_object(OBJ_BLOB, &buf, &last_blob, NULL, next_mark);
1717 }
1718
1719 static void unload_one_branch(void)
1720 {
1721 while (cur_active_branches
1722 && cur_active_branches >= max_active_branches) {
1723 uintmax_t min_commit = ULONG_MAX;
1724 struct branch *e, *l = NULL, *p = NULL;
1725
1726 for (e = active_branches; e; e = e->active_next_branch) {
1727 if (e->last_commit < min_commit) {
1728 p = l;
1729 min_commit = e->last_commit;
1730 }
1731 l = e;
1732 }
1733
1734 if (p) {
1735 e = p->active_next_branch;
1736 p->active_next_branch = e->active_next_branch;
1737 } else {
1738 e = active_branches;
1739 active_branches = e->active_next_branch;
1740 }
1741 e->active = 0;
1742 e->active_next_branch = NULL;
1743 if (e->branch_tree.tree) {
1744 release_tree_content_recursive(e->branch_tree.tree);
1745 e->branch_tree.tree = NULL;
1746 }
1747 cur_active_branches--;
1748 }
1749 }
1750
1751 static void load_branch(struct branch *b)
1752 {
1753 load_tree(&b->branch_tree);
1754 if (!b->active) {
1755 b->active = 1;
1756 b->active_next_branch = active_branches;
1757 active_branches = b;
1758 cur_active_branches++;
1759 branch_load_count++;
1760 }
1761 }
1762
1763 static void file_change_m(struct branch *b)
1764 {
1765 const char *p = command_buf.buf + 2;
1766 static struct strbuf uq = STRBUF_INIT;
1767 const char *endp;
1768 struct object_entry *oe = oe;
1769 unsigned char sha1[20];
1770 uint16_t mode, inline_data = 0;
1771
1772 p = get_mode(p, &mode);
1773 if (!p)
1774 die("Corrupt mode: %s", command_buf.buf);
1775 switch (mode) {
1776 case S_IFREG | 0644:
1777 case S_IFREG | 0755:
1778 case S_IFLNK:
1779 case 0644:
1780 case 0755:
1781 /* ok */
1782 break;
1783 default:
1784 die("Corrupt mode: %s", command_buf.buf);
1785 }
1786
1787 if (*p == ':') {
1788 char *x;
1789 oe = find_mark(strtoumax(p + 1, &x, 10));
1790 hashcpy(sha1, oe->sha1);
1791 p = x;
1792 } else if (!prefixcmp(p, "inline")) {
1793 inline_data = 1;
1794 p += 6;
1795 } else {
1796 if (get_sha1_hex(p, sha1))
1797 die("Invalid SHA1: %s", command_buf.buf);
1798 oe = find_object(sha1);
1799 p += 40;
1800 }
1801 if (*p++ != ' ')
1802 die("Missing space after SHA1: %s", command_buf.buf);
1803
1804 strbuf_reset(&uq);
1805 if (!unquote_c_style(&uq, p, &endp)) {
1806 if (*endp)
1807 die("Garbage after path in: %s", command_buf.buf);
1808 p = uq.buf;
1809 }
1810
1811 if (inline_data) {
1812 static struct strbuf buf = STRBUF_INIT;
1813
1814 if (p != uq.buf) {
1815 strbuf_addstr(&uq, p);
1816 p = uq.buf;
1817 }
1818 read_next_command();
1819 cmd_data(&buf);
1820 store_object(OBJ_BLOB, &buf, &last_blob, sha1, 0);
1821 } else if (oe) {
1822 if (oe->type != OBJ_BLOB)
1823 die("Not a blob (actually a %s): %s",
1824 typename(oe->type), command_buf.buf);
1825 } else {
1826 enum object_type type = sha1_object_info(sha1, NULL);
1827 if (type < 0)
1828 die("Blob not found: %s", command_buf.buf);
1829 if (type != OBJ_BLOB)
1830 die("Not a blob (actually a %s): %s",
1831 typename(type), command_buf.buf);
1832 }
1833
1834 tree_content_set(&b->branch_tree, p, sha1, S_IFREG | mode, NULL);
1835 }
1836
1837 static void file_change_d(struct branch *b)
1838 {
1839 const char *p = command_buf.buf + 2;
1840 static struct strbuf uq = STRBUF_INIT;
1841 const char *endp;
1842
1843 strbuf_reset(&uq);
1844 if (!unquote_c_style(&uq, p, &endp)) {
1845 if (*endp)
1846 die("Garbage after path in: %s", command_buf.buf);
1847 p = uq.buf;
1848 }
1849 tree_content_remove(&b->branch_tree, p, NULL);
1850 }
1851
1852 static void file_change_cr(struct branch *b, int rename)
1853 {
1854 const char *s, *d;
1855 static struct strbuf s_uq = STRBUF_INIT;
1856 static struct strbuf d_uq = STRBUF_INIT;
1857 const char *endp;
1858 struct tree_entry leaf;
1859
1860 s = command_buf.buf + 2;
1861 strbuf_reset(&s_uq);
1862 if (!unquote_c_style(&s_uq, s, &endp)) {
1863 if (*endp != ' ')
1864 die("Missing space after source: %s", command_buf.buf);
1865 } else {
1866 endp = strchr(s, ' ');
1867 if (!endp)
1868 die("Missing space after source: %s", command_buf.buf);
1869 strbuf_add(&s_uq, s, endp - s);
1870 }
1871 s = s_uq.buf;
1872
1873 endp++;
1874 if (!*endp)
1875 die("Missing dest: %s", command_buf.buf);
1876
1877 d = endp;
1878 strbuf_reset(&d_uq);
1879 if (!unquote_c_style(&d_uq, d, &endp)) {
1880 if (*endp)
1881 die("Garbage after dest in: %s", command_buf.buf);
1882 d = d_uq.buf;
1883 }
1884
1885 memset(&leaf, 0, sizeof(leaf));
1886 if (rename)
1887 tree_content_remove(&b->branch_tree, s, &leaf);
1888 else
1889 tree_content_get(&b->branch_tree, s, &leaf);
1890 if (!leaf.versions[1].mode)
1891 die("Path %s not in branch", s);
1892 tree_content_set(&b->branch_tree, d,
1893 leaf.versions[1].sha1,
1894 leaf.versions[1].mode,
1895 leaf.tree);
1896 }
1897
1898 static void file_change_deleteall(struct branch *b)
1899 {
1900 release_tree_content_recursive(b->branch_tree.tree);
1901 hashclr(b->branch_tree.versions[0].sha1);
1902 hashclr(b->branch_tree.versions[1].sha1);
1903 load_tree(&b->branch_tree);
1904 }
1905
1906 static void cmd_from_commit(struct branch *b, char *buf, unsigned long size)
1907 {
1908 if (!buf || size < 46)
1909 die("Not a valid commit: %s", sha1_to_hex(b->sha1));
1910 if (memcmp("tree ", buf, 5)
1911 || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
1912 die("The commit %s is corrupt", sha1_to_hex(b->sha1));
1913 hashcpy(b->branch_tree.versions[0].sha1,
1914 b->branch_tree.versions[1].sha1);
1915 }
1916
1917 static void cmd_from_existing(struct branch *b)
1918 {
1919 if (is_null_sha1(b->sha1)) {
1920 hashclr(b->branch_tree.versions[0].sha1);
1921 hashclr(b->branch_tree.versions[1].sha1);
1922 } else {
1923 unsigned long size;
1924 char *buf;
1925
1926 buf = read_object_with_reference(b->sha1,
1927 commit_type, &size, b->sha1);
1928 cmd_from_commit(b, buf, size);
1929 free(buf);
1930 }
1931 }
1932
1933 static int cmd_from(struct branch *b)
1934 {
1935 const char *from;
1936 struct branch *s;
1937
1938 if (prefixcmp(command_buf.buf, "from "))
1939 return 0;
1940
1941 if (b->branch_tree.tree) {
1942 release_tree_content_recursive(b->branch_tree.tree);
1943 b->branch_tree.tree = NULL;
1944 }
1945
1946 from = strchr(command_buf.buf, ' ') + 1;
1947 s = lookup_branch(from);
1948 if (b == s)
1949 die("Can't create a branch from itself: %s", b->name);
1950 else if (s) {
1951 unsigned char *t = s->branch_tree.versions[1].sha1;
1952 hashcpy(b->sha1, s->sha1);
1953 hashcpy(b->branch_tree.versions[0].sha1, t);
1954 hashcpy(b->branch_tree.versions[1].sha1, t);
1955 } else if (*from == ':') {
1956 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1957 struct object_entry *oe = find_mark(idnum);
1958 if (oe->type != OBJ_COMMIT)
1959 die("Mark :%" PRIuMAX " not a commit", idnum);
1960 hashcpy(b->sha1, oe->sha1);
1961 if (oe->pack_id != MAX_PACK_ID) {
1962 unsigned long size;
1963 char *buf = gfi_unpack_entry(oe, &size);
1964 cmd_from_commit(b, buf, size);
1965 free(buf);
1966 } else
1967 cmd_from_existing(b);
1968 } else if (!get_sha1(from, b->sha1))
1969 cmd_from_existing(b);
1970 else
1971 die("Invalid ref name or SHA1 expression: %s", from);
1972
1973 read_next_command();
1974 return 1;
1975 }
1976
1977 static struct hash_list *cmd_merge(unsigned int *count)
1978 {
1979 struct hash_list *list = NULL, *n, *e = e;
1980 const char *from;
1981 struct branch *s;
1982
1983 *count = 0;
1984 while (!prefixcmp(command_buf.buf, "merge ")) {
1985 from = strchr(command_buf.buf, ' ') + 1;
1986 n = xmalloc(sizeof(*n));
1987 s = lookup_branch(from);
1988 if (s)
1989 hashcpy(n->sha1, s->sha1);
1990 else if (*from == ':') {
1991 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1992 struct object_entry *oe = find_mark(idnum);
1993 if (oe->type != OBJ_COMMIT)
1994 die("Mark :%" PRIuMAX " not a commit", idnum);
1995 hashcpy(n->sha1, oe->sha1);
1996 } else if (!get_sha1(from, n->sha1)) {
1997 unsigned long size;
1998 char *buf = read_object_with_reference(n->sha1,
1999 commit_type, &size, n->sha1);
2000 if (!buf || size < 46)
2001 die("Not a valid commit: %s", from);
2002 free(buf);
2003 } else
2004 die("Invalid ref name or SHA1 expression: %s", from);
2005
2006 n->next = NULL;
2007 if (list)
2008 e->next = n;
2009 else
2010 list = n;
2011 e = n;
2012 (*count)++;
2013 read_next_command();
2014 }
2015 return list;
2016 }
2017
2018 static void cmd_new_commit(void)
2019 {
2020 static struct strbuf msg = STRBUF_INIT;
2021 struct branch *b;
2022 char *sp;
2023 char *author = NULL;
2024 char *committer = NULL;
2025 struct hash_list *merge_list = NULL;
2026 unsigned int merge_count;
2027
2028 /* Obtain the branch name from the rest of our command */
2029 sp = strchr(command_buf.buf, ' ') + 1;
2030 b = lookup_branch(sp);
2031 if (!b)
2032 b = new_branch(sp);
2033
2034 read_next_command();
2035 cmd_mark();
2036 if (!prefixcmp(command_buf.buf, "author ")) {
2037 author = parse_ident(command_buf.buf + 7);
2038 read_next_command();
2039 }
2040 if (!prefixcmp(command_buf.buf, "committer ")) {
2041 committer = parse_ident(command_buf.buf + 10);
2042 read_next_command();
2043 }
2044 if (!committer)
2045 die("Expected committer but didn't get one");
2046 cmd_data(&msg);
2047 read_next_command();
2048 cmd_from(b);
2049 merge_list = cmd_merge(&merge_count);
2050
2051 /* ensure the branch is active/loaded */
2052 if (!b->branch_tree.tree || !max_active_branches) {
2053 unload_one_branch();
2054 load_branch(b);
2055 }
2056
2057 /* file_change* */
2058 while (command_buf.len > 0) {
2059 if (!prefixcmp(command_buf.buf, "M "))
2060 file_change_m(b);
2061 else if (!prefixcmp(command_buf.buf, "D "))
2062 file_change_d(b);
2063 else if (!prefixcmp(command_buf.buf, "R "))
2064 file_change_cr(b, 1);
2065 else if (!prefixcmp(command_buf.buf, "C "))
2066 file_change_cr(b, 0);
2067 else if (!strcmp("deleteall", command_buf.buf))
2068 file_change_deleteall(b);
2069 else {
2070 unread_command_buf = 1;
2071 break;
2072 }
2073 if (read_next_command() == EOF)
2074 break;
2075 }
2076
2077 /* build the tree and the commit */
2078 store_tree(&b->branch_tree);
2079 hashcpy(b->branch_tree.versions[0].sha1,
2080 b->branch_tree.versions[1].sha1);
2081
2082 strbuf_reset(&new_data);
2083 strbuf_addf(&new_data, "tree %s\n",
2084 sha1_to_hex(b->branch_tree.versions[1].sha1));
2085 if (!is_null_sha1(b->sha1))
2086 strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(b->sha1));
2087 while (merge_list) {
2088 struct hash_list *next = merge_list->next;
2089 strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(merge_list->sha1));
2090 free(merge_list);
2091 merge_list = next;
2092 }
2093 strbuf_addf(&new_data,
2094 "author %s\n"
2095 "committer %s\n"
2096 "\n",
2097 author ? author : committer, committer);
2098 strbuf_addbuf(&new_data, &msg);
2099 free(author);
2100 free(committer);
2101
2102 if (!store_object(OBJ_COMMIT, &new_data, NULL, b->sha1, next_mark))
2103 b->pack_id = pack_id;
2104 b->last_commit = object_count_by_type[OBJ_COMMIT];
2105 }
2106
2107 static void cmd_new_tag(void)
2108 {
2109 static struct strbuf msg = STRBUF_INIT;
2110 char *sp;
2111 const char *from;
2112 char *tagger;
2113 struct branch *s;
2114 struct tag *t;
2115 uintmax_t from_mark = 0;
2116 unsigned char sha1[20];
2117
2118 /* Obtain the new tag name from the rest of our command */
2119 sp = strchr(command_buf.buf, ' ') + 1;
2120 t = pool_alloc(sizeof(struct tag));
2121 t->next_tag = NULL;
2122 t->name = pool_strdup(sp);
2123 if (last_tag)
2124 last_tag->next_tag = t;
2125 else
2126 first_tag = t;
2127 last_tag = t;
2128 read_next_command();
2129
2130 /* from ... */
2131 if (prefixcmp(command_buf.buf, "from "))
2132 die("Expected from command, got %s", command_buf.buf);
2133 from = strchr(command_buf.buf, ' ') + 1;
2134 s = lookup_branch(from);
2135 if (s) {
2136 hashcpy(sha1, s->sha1);
2137 } else if (*from == ':') {
2138 struct object_entry *oe;
2139 from_mark = strtoumax(from + 1, NULL, 10);
2140 oe = find_mark(from_mark);
2141 if (oe->type != OBJ_COMMIT)
2142 die("Mark :%" PRIuMAX " not a commit", from_mark);
2143 hashcpy(sha1, oe->sha1);
2144 } else if (!get_sha1(from, sha1)) {
2145 unsigned long size;
2146 char *buf;
2147
2148 buf = read_object_with_reference(sha1,
2149 commit_type, &size, sha1);
2150 if (!buf || size < 46)
2151 die("Not a valid commit: %s", from);
2152 free(buf);
2153 } else
2154 die("Invalid ref name or SHA1 expression: %s", from);
2155 read_next_command();
2156
2157 /* tagger ... */
2158 if (prefixcmp(command_buf.buf, "tagger "))
2159 die("Expected tagger command, got %s", command_buf.buf);
2160 tagger = parse_ident(command_buf.buf + 7);
2161
2162 /* tag payload/message */
2163 read_next_command();
2164 cmd_data(&msg);
2165
2166 /* build the tag object */
2167 strbuf_reset(&new_data);
2168 strbuf_addf(&new_data,
2169 "object %s\n"
2170 "type %s\n"
2171 "tag %s\n"
2172 "tagger %s\n"
2173 "\n",
2174 sha1_to_hex(sha1), commit_type, t->name, tagger);
2175 strbuf_addbuf(&new_data, &msg);
2176 free(tagger);
2177
2178 if (store_object(OBJ_TAG, &new_data, NULL, t->sha1, 0))
2179 t->pack_id = MAX_PACK_ID;
2180 else
2181 t->pack_id = pack_id;
2182 }
2183
2184 static void cmd_reset_branch(void)
2185 {
2186 struct branch *b;
2187 char *sp;
2188
2189 /* Obtain the branch name from the rest of our command */
2190 sp = strchr(command_buf.buf, ' ') + 1;
2191 b = lookup_branch(sp);
2192 if (b) {
2193 hashclr(b->sha1);
2194 hashclr(b->branch_tree.versions[0].sha1);
2195 hashclr(b->branch_tree.versions[1].sha1);
2196 if (b->branch_tree.tree) {
2197 release_tree_content_recursive(b->branch_tree.tree);
2198 b->branch_tree.tree = NULL;
2199 }
2200 }
2201 else
2202 b = new_branch(sp);
2203 read_next_command();
2204 if (!cmd_from(b) && command_buf.len > 0)
2205 unread_command_buf = 1;
2206 }
2207
2208 static void cmd_checkpoint(void)
2209 {
2210 if (object_count) {
2211 cycle_packfile();
2212 dump_branches();
2213 dump_tags();
2214 dump_marks();
2215 }
2216 skip_optional_lf();
2217 }
2218
2219 static void cmd_progress(void)
2220 {
2221 fwrite(command_buf.buf, 1, command_buf.len, stdout);
2222 fputc('\n', stdout);
2223 fflush(stdout);
2224 skip_optional_lf();
2225 }
2226
2227 static void import_marks(const char *input_file)
2228 {
2229 char line[512];
2230 FILE *f = fopen(input_file, "r");
2231 if (!f)
2232 die("cannot read %s: %s", input_file, strerror(errno));
2233 while (fgets(line, sizeof(line), f)) {
2234 uintmax_t mark;
2235 char *end;
2236 unsigned char sha1[20];
2237 struct object_entry *e;
2238
2239 end = strchr(line, '\n');
2240 if (line[0] != ':' || !end)
2241 die("corrupt mark line: %s", line);
2242 *end = 0;
2243 mark = strtoumax(line + 1, &end, 10);
2244 if (!mark || end == line + 1
2245 || *end != ' ' || get_sha1(end + 1, sha1))
2246 die("corrupt mark line: %s", line);
2247 e = find_object(sha1);
2248 if (!e) {
2249 enum object_type type = sha1_object_info(sha1, NULL);
2250 if (type < 0)
2251 die("object not found: %s", sha1_to_hex(sha1));
2252 e = insert_object(sha1);
2253 e->type = type;
2254 e->pack_id = MAX_PACK_ID;
2255 e->offset = 1; /* just not zero! */
2256 }
2257 insert_mark(mark, e);
2258 }
2259 fclose(f);
2260 }
2261
2262 static const char fast_import_usage[] =
2263 "git-fast-import [--date-format=f] [--max-pack-size=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file]";
2264
2265 int main(int argc, const char **argv)
2266 {
2267 unsigned int i, show_stats = 1;
2268
2269 git_config(git_default_config);
2270 alloc_objects(object_entry_alloc);
2271 strbuf_init(&command_buf, 0);
2272 atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
2273 branch_table = xcalloc(branch_table_sz, sizeof(struct branch*));
2274 avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*));
2275 marks = pool_calloc(1, sizeof(struct mark_set));
2276
2277 for (i = 1; i < argc; i++) {
2278 const char *a = argv[i];
2279
2280 if (*a != '-' || !strcmp(a, "--"))
2281 break;
2282 else if (!prefixcmp(a, "--date-format=")) {
2283 const char *fmt = a + 14;
2284 if (!strcmp(fmt, "raw"))
2285 whenspec = WHENSPEC_RAW;
2286 else if (!strcmp(fmt, "rfc2822"))
2287 whenspec = WHENSPEC_RFC2822;
2288 else if (!strcmp(fmt, "now"))
2289 whenspec = WHENSPEC_NOW;
2290 else
2291 die("unknown --date-format argument %s", fmt);
2292 }
2293 else if (!prefixcmp(a, "--max-pack-size="))
2294 max_packsize = strtoumax(a + 16, NULL, 0) * 1024 * 1024;
2295 else if (!prefixcmp(a, "--depth=")) {
2296 max_depth = strtoul(a + 8, NULL, 0);
2297 if (max_depth > MAX_DEPTH)
2298 die("--depth cannot exceed %u", MAX_DEPTH);
2299 }
2300 else if (!prefixcmp(a, "--active-branches="))
2301 max_active_branches = strtoul(a + 18, NULL, 0);
2302 else if (!prefixcmp(a, "--import-marks="))
2303 import_marks(a + 15);
2304 else if (!prefixcmp(a, "--export-marks="))
2305 mark_file = a + 15;
2306 else if (!prefixcmp(a, "--export-pack-edges=")) {
2307 if (pack_edges)
2308 fclose(pack_edges);
2309 pack_edges = fopen(a + 20, "a");
2310 if (!pack_edges)
2311 die("Cannot open %s: %s", a + 20, strerror(errno));
2312 } else if (!strcmp(a, "--force"))
2313 force_update = 1;
2314 else if (!strcmp(a, "--quiet"))
2315 show_stats = 0;
2316 else if (!strcmp(a, "--stats"))
2317 show_stats = 1;
2318 else
2319 die("unknown option %s", a);
2320 }
2321 if (i != argc)
2322 usage(fast_import_usage);
2323
2324 rc_free = pool_alloc(cmd_save * sizeof(*rc_free));
2325 for (i = 0; i < (cmd_save - 1); i++)
2326 rc_free[i].next = &rc_free[i + 1];
2327 rc_free[cmd_save - 1].next = NULL;
2328
2329 prepare_packed_git();
2330 start_packfile();
2331 set_die_routine(die_nicely);
2332 while (read_next_command() != EOF) {
2333 if (!strcmp("blob", command_buf.buf))
2334 cmd_new_blob();
2335 else if (!prefixcmp(command_buf.buf, "commit "))
2336 cmd_new_commit();
2337 else if (!prefixcmp(command_buf.buf, "tag "))
2338 cmd_new_tag();
2339 else if (!prefixcmp(command_buf.buf, "reset "))
2340 cmd_reset_branch();
2341 else if (!strcmp("checkpoint", command_buf.buf))
2342 cmd_checkpoint();
2343 else if (!prefixcmp(command_buf.buf, "progress "))
2344 cmd_progress();
2345 else
2346 die("Unsupported command: %s", command_buf.buf);
2347 }
2348 end_packfile();
2349
2350 dump_branches();
2351 dump_tags();
2352 unkeep_all_packs();
2353 dump_marks();
2354
2355 if (pack_edges)
2356 fclose(pack_edges);
2357
2358 if (show_stats) {
2359 uintmax_t total_count = 0, duplicate_count = 0;
2360 for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++)
2361 total_count += object_count_by_type[i];
2362 for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++)
2363 duplicate_count += duplicate_count_by_type[i];
2364
2365 fprintf(stderr, "%s statistics:\n", argv[0]);
2366 fprintf(stderr, "---------------------------------------------------------------------\n");
2367 fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
2368 fprintf(stderr, "Total objects: %10" PRIuMAX " (%10" PRIuMAX " duplicates )\n", total_count, duplicate_count);
2369 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]);
2370 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]);
2371 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]);
2372 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]);
2373 fprintf(stderr, "Total branches: %10lu (%10lu loads )\n", branch_count, branch_load_count);
2374 fprintf(stderr, " marks: %10" PRIuMAX " (%10" PRIuMAX " unique )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
2375 fprintf(stderr, " atoms: %10u\n", atom_cnt);
2376 fprintf(stderr, "Memory total: %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024);
2377 fprintf(stderr, " pools: %10lu KiB\n", (unsigned long)(total_allocd/1024));
2378 fprintf(stderr, " objects: %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
2379 fprintf(stderr, "---------------------------------------------------------------------\n");
2380 pack_report();
2381 fprintf(stderr, "---------------------------------------------------------------------\n");
2382 fprintf(stderr, "\n");
2383 }
2384
2385 return failure ? 1 : 0;
2386 }
git for Debian