970d8470ed7c350337f28570fd2c111186a7941d
[git/git.git] / fast-import.c
1 /*
2 (See Documentation/git-fast-import.txt for maintained documentation.)
3 Format of STDIN stream:
4
5 stream ::= cmd*;
6
7 cmd ::= new_blob
8 | new_commit
9 | new_tag
10 | reset_branch
11 | checkpoint
12 | progress
13 ;
14
15 new_blob ::= 'blob' lf
16 mark?
17 file_content;
18 file_content ::= data;
19
20 new_commit ::= 'commit' sp ref_str lf
21 mark?
22 ('author' (sp name)? sp '<' email '>' sp when lf)?
23 'committer' (sp name)? sp '<' email '>' sp when lf
24 commit_msg
25 ('from' sp committish lf)?
26 ('merge' sp committish lf)*
27 file_change*
28 lf?;
29 commit_msg ::= data;
30
31 file_change ::= file_clr
32 | file_del
33 | file_rnm
34 | file_cpy
35 | file_obm
36 | file_inm;
37 file_clr ::= 'deleteall' lf;
38 file_del ::= 'D' sp path_str lf;
39 file_rnm ::= 'R' sp path_str sp path_str lf;
40 file_cpy ::= 'C' sp path_str sp path_str lf;
41 file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf;
42 file_inm ::= 'M' sp mode sp 'inline' sp path_str lf
43 data;
44 note_obm ::= 'N' sp (hexsha1 | idnum) sp committish lf;
45 note_inm ::= 'N' sp 'inline' sp committish lf
46 data;
47
48 new_tag ::= 'tag' sp tag_str lf
49 'from' sp committish lf
50 ('tagger' (sp name)? sp '<' email '>' sp when lf)?
51 tag_msg;
52 tag_msg ::= data;
53
54 reset_branch ::= 'reset' sp ref_str lf
55 ('from' sp committish lf)?
56 lf?;
57
58 checkpoint ::= 'checkpoint' lf
59 lf?;
60
61 progress ::= 'progress' sp not_lf* lf
62 lf?;
63
64 # note: the first idnum in a stream should be 1 and subsequent
65 # idnums should not have gaps between values as this will cause
66 # the stream parser to reserve space for the gapped values. An
67 # idnum can be updated in the future to a new object by issuing
68 # a new mark directive with the old idnum.
69 #
70 mark ::= 'mark' sp idnum lf;
71 data ::= (delimited_data | exact_data)
72 lf?;
73
74 # note: delim may be any string but must not contain lf.
75 # data_line may contain any data but must not be exactly
76 # delim.
77 delimited_data ::= 'data' sp '<<' delim lf
78 (data_line lf)*
79 delim lf;
80
81 # note: declen indicates the length of binary_data in bytes.
82 # declen does not include the lf preceding the binary data.
83 #
84 exact_data ::= 'data' sp declen lf
85 binary_data;
86
87 # note: quoted strings are C-style quoting supporting \c for
88 # common escapes of 'c' (e..g \n, \t, \\, \") or \nnn where nnn
89 # is the signed byte value in octal. Note that the only
90 # characters which must actually be escaped to protect the
91 # stream formatting is: \, " and LF. Otherwise these values
92 # are UTF8.
93 #
94 committish ::= (ref_str | hexsha1 | sha1exp_str | idnum);
95 ref_str ::= ref;
96 sha1exp_str ::= sha1exp;
97 tag_str ::= tag;
98 path_str ::= path | '"' quoted(path) '"' ;
99 mode ::= '100644' | '644'
100 | '100755' | '755'
101 | '120000'
102 ;
103
104 declen ::= # unsigned 32 bit value, ascii base10 notation;
105 bigint ::= # unsigned integer value, ascii base10 notation;
106 binary_data ::= # file content, not interpreted;
107
108 when ::= raw_when | rfc2822_when;
109 raw_when ::= ts sp tz;
110 rfc2822_when ::= # Valid RFC 2822 date and time;
111
112 sp ::= # ASCII space character;
113 lf ::= # ASCII newline (LF) character;
114
115 # note: a colon (':') must precede the numerical value assigned to
116 # an idnum. This is to distinguish it from a ref or tag name as
117 # GIT does not permit ':' in ref or tag strings.
118 #
119 idnum ::= ':' bigint;
120 path ::= # GIT style file path, e.g. "a/b/c";
121 ref ::= # GIT ref name, e.g. "refs/heads/MOZ_GECKO_EXPERIMENT";
122 tag ::= # GIT tag name, e.g. "FIREFOX_1_5";
123 sha1exp ::= # Any valid GIT SHA1 expression;
124 hexsha1 ::= # SHA1 in hexadecimal format;
125
126 # note: name and email are UTF8 strings, however name must not
127 # contain '<' or lf and email must not contain any of the
128 # following: '<', '>', lf.
129 #
130 name ::= # valid GIT author/committer name;
131 email ::= # valid GIT author/committer email;
132 ts ::= # time since the epoch in seconds, ascii base10 notation;
133 tz ::= # GIT style timezone;
134
135 # note: comments and cat requests may appear anywhere
136 # in the input, except within a data command. Any form
137 # of the data command always escapes the related input
138 # from comment processing.
139 #
140 # In case it is not clear, the '#' that starts the comment
141 # must be the first character on that line (an lf
142 # preceded it).
143 #
144 cat_blob ::= 'cat-blob' sp (hexsha1 | idnum) lf;
145
146 comment ::= '#' not_lf* lf;
147 not_lf ::= # Any byte that is not ASCII newline (LF);
148 */
149
150 #include "builtin.h"
151 #include "cache.h"
152 #include "object.h"
153 #include "blob.h"
154 #include "tree.h"
155 #include "commit.h"
156 #include "delta.h"
157 #include "pack.h"
158 #include "refs.h"
159 #include "csum-file.h"
160 #include "quote.h"
161 #include "exec_cmd.h"
162 #include "dir.h"
163
164 #define PACK_ID_BITS 16
165 #define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
166 #define DEPTH_BITS 13
167 #define MAX_DEPTH ((1<<DEPTH_BITS)-1)
168
169 struct object_entry
170 {
171 struct pack_idx_entry idx;
172 struct object_entry *next;
173 uint32_t type : TYPE_BITS,
174 pack_id : PACK_ID_BITS,
175 depth : DEPTH_BITS;
176 };
177
178 struct object_entry_pool
179 {
180 struct object_entry_pool *next_pool;
181 struct object_entry *next_free;
182 struct object_entry *end;
183 struct object_entry entries[FLEX_ARRAY]; /* more */
184 };
185
186 struct mark_set
187 {
188 union {
189 struct object_entry *marked[1024];
190 struct mark_set *sets[1024];
191 } data;
192 unsigned int shift;
193 };
194
195 struct last_object
196 {
197 struct strbuf data;
198 off_t offset;
199 unsigned int depth;
200 unsigned no_swap : 1;
201 };
202
203 struct mem_pool
204 {
205 struct mem_pool *next_pool;
206 char *next_free;
207 char *end;
208 uintmax_t space[FLEX_ARRAY]; /* more */
209 };
210
211 struct atom_str
212 {
213 struct atom_str *next_atom;
214 unsigned short str_len;
215 char str_dat[FLEX_ARRAY]; /* more */
216 };
217
218 struct tree_content;
219 struct tree_entry
220 {
221 struct tree_content *tree;
222 struct atom_str *name;
223 struct tree_entry_ms
224 {
225 uint16_t mode;
226 unsigned char sha1[20];
227 } versions[2];
228 };
229
230 struct tree_content
231 {
232 unsigned int entry_capacity; /* must match avail_tree_content */
233 unsigned int entry_count;
234 unsigned int delta_depth;
235 struct tree_entry *entries[FLEX_ARRAY]; /* more */
236 };
237
238 struct avail_tree_content
239 {
240 unsigned int entry_capacity; /* must match tree_content */
241 struct avail_tree_content *next_avail;
242 };
243
244 struct branch
245 {
246 struct branch *table_next_branch;
247 struct branch *active_next_branch;
248 const char *name;
249 struct tree_entry branch_tree;
250 uintmax_t last_commit;
251 uintmax_t num_notes;
252 unsigned active : 1;
253 unsigned pack_id : PACK_ID_BITS;
254 unsigned char sha1[20];
255 };
256
257 struct tag
258 {
259 struct tag *next_tag;
260 const char *name;
261 unsigned int pack_id;
262 unsigned char sha1[20];
263 };
264
265 struct hash_list
266 {
267 struct hash_list *next;
268 unsigned char sha1[20];
269 };
270
271 typedef enum {
272 WHENSPEC_RAW = 1,
273 WHENSPEC_RFC2822,
274 WHENSPEC_NOW
275 } whenspec_type;
276
277 struct recent_command
278 {
279 struct recent_command *prev;
280 struct recent_command *next;
281 char *buf;
282 };
283
284 /* Configured limits on output */
285 static unsigned long max_depth = 10;
286 static off_t max_packsize;
287 static uintmax_t big_file_threshold = 512 * 1024 * 1024;
288 static int force_update;
289 static int pack_compression_level = Z_DEFAULT_COMPRESSION;
290 static int pack_compression_seen;
291
292 /* Stats and misc. counters */
293 static uintmax_t alloc_count;
294 static uintmax_t marks_set_count;
295 static uintmax_t object_count_by_type[1 << TYPE_BITS];
296 static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
297 static uintmax_t delta_count_by_type[1 << TYPE_BITS];
298 static unsigned long object_count;
299 static unsigned long branch_count;
300 static unsigned long branch_load_count;
301 static int failure;
302 static FILE *pack_edges;
303 static unsigned int show_stats = 1;
304 static int global_argc;
305 static const char **global_argv;
306
307 /* Memory pools */
308 static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
309 static size_t total_allocd;
310 static struct mem_pool *mem_pool;
311
312 /* Atom management */
313 static unsigned int atom_table_sz = 4451;
314 static unsigned int atom_cnt;
315 static struct atom_str **atom_table;
316
317 /* The .pack file being generated */
318 static unsigned int pack_id;
319 static struct sha1file *pack_file;
320 static struct packed_git *pack_data;
321 static struct packed_git **all_packs;
322 static off_t pack_size;
323
324 /* Table of objects we've written. */
325 static unsigned int object_entry_alloc = 5000;
326 static struct object_entry_pool *blocks;
327 static struct object_entry *object_table[1 << 16];
328 static struct mark_set *marks;
329 static const char *export_marks_file;
330 static const char *import_marks_file;
331 static int import_marks_file_from_stream;
332 static int relative_marks_paths;
333
334 /* Our last blob */
335 static struct last_object last_blob = { STRBUF_INIT, 0, 0, 0 };
336
337 /* Tree management */
338 static unsigned int tree_entry_alloc = 1000;
339 static void *avail_tree_entry;
340 static unsigned int avail_tree_table_sz = 100;
341 static struct avail_tree_content **avail_tree_table;
342 static struct strbuf old_tree = STRBUF_INIT;
343 static struct strbuf new_tree = STRBUF_INIT;
344
345 /* Branch data */
346 static unsigned long max_active_branches = 5;
347 static unsigned long cur_active_branches;
348 static unsigned long branch_table_sz = 1039;
349 static struct branch **branch_table;
350 static struct branch *active_branches;
351
352 /* Tag data */
353 static struct tag *first_tag;
354 static struct tag *last_tag;
355
356 /* Input stream parsing */
357 static whenspec_type whenspec = WHENSPEC_RAW;
358 static struct strbuf command_buf = STRBUF_INIT;
359 static int unread_command_buf;
360 static struct recent_command cmd_hist = {&cmd_hist, &cmd_hist, NULL};
361 static struct recent_command *cmd_tail = &cmd_hist;
362 static struct recent_command *rc_free;
363 static unsigned int cmd_save = 100;
364 static uintmax_t next_mark;
365 static struct strbuf new_data = STRBUF_INIT;
366 static int seen_data_command;
367
368 /* Signal handling */
369 static volatile sig_atomic_t checkpoint_requested;
370
371 /* Where to write output of cat-blob commands */
372 static int cat_blob_fd = STDOUT_FILENO;
373
374 static void parse_argv(void);
375 static void parse_cat_blob(void);
376
377 static void write_branch_report(FILE *rpt, struct branch *b)
378 {
379 fprintf(rpt, "%s:\n", b->name);
380
381 fprintf(rpt, " status :");
382 if (b->active)
383 fputs(" active", rpt);
384 if (b->branch_tree.tree)
385 fputs(" loaded", rpt);
386 if (is_null_sha1(b->branch_tree.versions[1].sha1))
387 fputs(" dirty", rpt);
388 fputc('\n', rpt);
389
390 fprintf(rpt, " tip commit : %s\n", sha1_to_hex(b->sha1));
391 fprintf(rpt, " old tree : %s\n", sha1_to_hex(b->branch_tree.versions[0].sha1));
392 fprintf(rpt, " cur tree : %s\n", sha1_to_hex(b->branch_tree.versions[1].sha1));
393 fprintf(rpt, " commit clock: %" PRIuMAX "\n", b->last_commit);
394
395 fputs(" last pack : ", rpt);
396 if (b->pack_id < MAX_PACK_ID)
397 fprintf(rpt, "%u", b->pack_id);
398 fputc('\n', rpt);
399
400 fputc('\n', rpt);
401 }
402
403 static void dump_marks_helper(FILE *, uintmax_t, struct mark_set *);
404
405 static void write_crash_report(const char *err)
406 {
407 char *loc = git_path("fast_import_crash_%"PRIuMAX, (uintmax_t) getpid());
408 FILE *rpt = fopen(loc, "w");
409 struct branch *b;
410 unsigned long lu;
411 struct recent_command *rc;
412
413 if (!rpt) {
414 error("can't write crash report %s: %s", loc, strerror(errno));
415 return;
416 }
417
418 fprintf(stderr, "fast-import: dumping crash report to %s\n", loc);
419
420 fprintf(rpt, "fast-import crash report:\n");
421 fprintf(rpt, " fast-import process: %"PRIuMAX"\n", (uintmax_t) getpid());
422 fprintf(rpt, " parent process : %"PRIuMAX"\n", (uintmax_t) getppid());
423 fprintf(rpt, " at %s\n", show_date(time(NULL), 0, DATE_LOCAL));
424 fputc('\n', rpt);
425
426 fputs("fatal: ", rpt);
427 fputs(err, rpt);
428 fputc('\n', rpt);
429
430 fputc('\n', rpt);
431 fputs("Most Recent Commands Before Crash\n", rpt);
432 fputs("---------------------------------\n", rpt);
433 for (rc = cmd_hist.next; rc != &cmd_hist; rc = rc->next) {
434 if (rc->next == &cmd_hist)
435 fputs("* ", rpt);
436 else
437 fputs(" ", rpt);
438 fputs(rc->buf, rpt);
439 fputc('\n', rpt);
440 }
441
442 fputc('\n', rpt);
443 fputs("Active Branch LRU\n", rpt);
444 fputs("-----------------\n", rpt);
445 fprintf(rpt, " active_branches = %lu cur, %lu max\n",
446 cur_active_branches,
447 max_active_branches);
448 fputc('\n', rpt);
449 fputs(" pos clock name\n", rpt);
450 fputs(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n", rpt);
451 for (b = active_branches, lu = 0; b; b = b->active_next_branch)
452 fprintf(rpt, " %2lu) %6" PRIuMAX" %s\n",
453 ++lu, b->last_commit, b->name);
454
455 fputc('\n', rpt);
456 fputs("Inactive Branches\n", rpt);
457 fputs("-----------------\n", rpt);
458 for (lu = 0; lu < branch_table_sz; lu++) {
459 for (b = branch_table[lu]; b; b = b->table_next_branch)
460 write_branch_report(rpt, b);
461 }
462
463 if (first_tag) {
464 struct tag *tg;
465 fputc('\n', rpt);
466 fputs("Annotated Tags\n", rpt);
467 fputs("--------------\n", rpt);
468 for (tg = first_tag; tg; tg = tg->next_tag) {
469 fputs(sha1_to_hex(tg->sha1), rpt);
470 fputc(' ', rpt);
471 fputs(tg->name, rpt);
472 fputc('\n', rpt);
473 }
474 }
475
476 fputc('\n', rpt);
477 fputs("Marks\n", rpt);
478 fputs("-----\n", rpt);
479 if (export_marks_file)
480 fprintf(rpt, " exported to %s\n", export_marks_file);
481 else
482 dump_marks_helper(rpt, 0, marks);
483
484 fputc('\n', rpt);
485 fputs("-------------------\n", rpt);
486 fputs("END OF CRASH REPORT\n", rpt);
487 fclose(rpt);
488 }
489
490 static void end_packfile(void);
491 static void unkeep_all_packs(void);
492 static void dump_marks(void);
493
494 static NORETURN void die_nicely(const char *err, va_list params)
495 {
496 static int zombie;
497 char message[2 * PATH_MAX];
498
499 vsnprintf(message, sizeof(message), err, params);
500 fputs("fatal: ", stderr);
501 fputs(message, stderr);
502 fputc('\n', stderr);
503
504 if (!zombie) {
505 zombie = 1;
506 write_crash_report(message);
507 end_packfile();
508 unkeep_all_packs();
509 dump_marks();
510 }
511 exit(128);
512 }
513
514 #ifndef SIGUSR1 /* Windows, for example */
515
516 static void set_checkpoint_signal(void)
517 {
518 }
519
520 #else
521
522 static void checkpoint_signal(int signo)
523 {
524 checkpoint_requested = 1;
525 }
526
527 static void set_checkpoint_signal(void)
528 {
529 struct sigaction sa;
530
531 memset(&sa, 0, sizeof(sa));
532 sa.sa_handler = checkpoint_signal;
533 sigemptyset(&sa.sa_mask);
534 sa.sa_flags = SA_RESTART;
535 sigaction(SIGUSR1, &sa, NULL);
536 }
537
538 #endif
539
540 static void alloc_objects(unsigned int cnt)
541 {
542 struct object_entry_pool *b;
543
544 b = xmalloc(sizeof(struct object_entry_pool)
545 + cnt * sizeof(struct object_entry));
546 b->next_pool = blocks;
547 b->next_free = b->entries;
548 b->end = b->entries + cnt;
549 blocks = b;
550 alloc_count += cnt;
551 }
552
553 static struct object_entry *new_object(unsigned char *sha1)
554 {
555 struct object_entry *e;
556
557 if (blocks->next_free == blocks->end)
558 alloc_objects(object_entry_alloc);
559
560 e = blocks->next_free++;
561 hashcpy(e->idx.sha1, sha1);
562 return e;
563 }
564
565 static struct object_entry *find_object(unsigned char *sha1)
566 {
567 unsigned int h = sha1[0] << 8 | sha1[1];
568 struct object_entry *e;
569 for (e = object_table[h]; e; e = e->next)
570 if (!hashcmp(sha1, e->idx.sha1))
571 return e;
572 return NULL;
573 }
574
575 static struct object_entry *insert_object(unsigned char *sha1)
576 {
577 unsigned int h = sha1[0] << 8 | sha1[1];
578 struct object_entry *e = object_table[h];
579
580 while (e) {
581 if (!hashcmp(sha1, e->idx.sha1))
582 return e;
583 e = e->next;
584 }
585
586 e = new_object(sha1);
587 e->next = object_table[h];
588 e->idx.offset = 0;
589 object_table[h] = e;
590 return e;
591 }
592
593 static unsigned int hc_str(const char *s, size_t len)
594 {
595 unsigned int r = 0;
596 while (len-- > 0)
597 r = r * 31 + *s++;
598 return r;
599 }
600
601 static void *pool_alloc(size_t len)
602 {
603 struct mem_pool *p;
604 void *r;
605
606 /* round up to a 'uintmax_t' alignment */
607 if (len & (sizeof(uintmax_t) - 1))
608 len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
609
610 for (p = mem_pool; p; p = p->next_pool)
611 if ((p->end - p->next_free >= len))
612 break;
613
614 if (!p) {
615 if (len >= (mem_pool_alloc/2)) {
616 total_allocd += len;
617 return xmalloc(len);
618 }
619 total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
620 p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc);
621 p->next_pool = mem_pool;
622 p->next_free = (char *) p->space;
623 p->end = p->next_free + mem_pool_alloc;
624 mem_pool = p;
625 }
626
627 r = p->next_free;
628 p->next_free += len;
629 return r;
630 }
631
632 static void *pool_calloc(size_t count, size_t size)
633 {
634 size_t len = count * size;
635 void *r = pool_alloc(len);
636 memset(r, 0, len);
637 return r;
638 }
639
640 static char *pool_strdup(const char *s)
641 {
642 char *r = pool_alloc(strlen(s) + 1);
643 strcpy(r, s);
644 return r;
645 }
646
647 static void insert_mark(uintmax_t idnum, struct object_entry *oe)
648 {
649 struct mark_set *s = marks;
650 while ((idnum >> s->shift) >= 1024) {
651 s = pool_calloc(1, sizeof(struct mark_set));
652 s->shift = marks->shift + 10;
653 s->data.sets[0] = marks;
654 marks = s;
655 }
656 while (s->shift) {
657 uintmax_t i = idnum >> s->shift;
658 idnum -= i << s->shift;
659 if (!s->data.sets[i]) {
660 s->data.sets[i] = pool_calloc(1, sizeof(struct mark_set));
661 s->data.sets[i]->shift = s->shift - 10;
662 }
663 s = s->data.sets[i];
664 }
665 if (!s->data.marked[idnum])
666 marks_set_count++;
667 s->data.marked[idnum] = oe;
668 }
669
670 static struct object_entry *find_mark(uintmax_t idnum)
671 {
672 uintmax_t orig_idnum = idnum;
673 struct mark_set *s = marks;
674 struct object_entry *oe = NULL;
675 if ((idnum >> s->shift) < 1024) {
676 while (s && s->shift) {
677 uintmax_t i = idnum >> s->shift;
678 idnum -= i << s->shift;
679 s = s->data.sets[i];
680 }
681 if (s)
682 oe = s->data.marked[idnum];
683 }
684 if (!oe)
685 die("mark :%" PRIuMAX " not declared", orig_idnum);
686 return oe;
687 }
688
689 static struct atom_str *to_atom(const char *s, unsigned short len)
690 {
691 unsigned int hc = hc_str(s, len) % atom_table_sz;
692 struct atom_str *c;
693
694 for (c = atom_table[hc]; c; c = c->next_atom)
695 if (c->str_len == len && !strncmp(s, c->str_dat, len))
696 return c;
697
698 c = pool_alloc(sizeof(struct atom_str) + len + 1);
699 c->str_len = len;
700 strncpy(c->str_dat, s, len);
701 c->str_dat[len] = 0;
702 c->next_atom = atom_table[hc];
703 atom_table[hc] = c;
704 atom_cnt++;
705 return c;
706 }
707
708 static struct branch *lookup_branch(const char *name)
709 {
710 unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
711 struct branch *b;
712
713 for (b = branch_table[hc]; b; b = b->table_next_branch)
714 if (!strcmp(name, b->name))
715 return b;
716 return NULL;
717 }
718
719 static struct branch *new_branch(const char *name)
720 {
721 unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
722 struct branch *b = lookup_branch(name);
723
724 if (b)
725 die("Invalid attempt to create duplicate branch: %s", name);
726 switch (check_ref_format(name)) {
727 case 0: break; /* its valid */
728 case CHECK_REF_FORMAT_ONELEVEL:
729 break; /* valid, but too few '/', allow anyway */
730 default:
731 die("Branch name doesn't conform to GIT standards: %s", name);
732 }
733
734 b = pool_calloc(1, sizeof(struct branch));
735 b->name = pool_strdup(name);
736 b->table_next_branch = branch_table[hc];
737 b->branch_tree.versions[0].mode = S_IFDIR;
738 b->branch_tree.versions[1].mode = S_IFDIR;
739 b->num_notes = 0;
740 b->active = 0;
741 b->pack_id = MAX_PACK_ID;
742 branch_table[hc] = b;
743 branch_count++;
744 return b;
745 }
746
747 static unsigned int hc_entries(unsigned int cnt)
748 {
749 cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
750 return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
751 }
752
753 static struct tree_content *new_tree_content(unsigned int cnt)
754 {
755 struct avail_tree_content *f, *l = NULL;
756 struct tree_content *t;
757 unsigned int hc = hc_entries(cnt);
758
759 for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
760 if (f->entry_capacity >= cnt)
761 break;
762
763 if (f) {
764 if (l)
765 l->next_avail = f->next_avail;
766 else
767 avail_tree_table[hc] = f->next_avail;
768 } else {
769 cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
770 f = pool_alloc(sizeof(*t) + sizeof(t->entries[0]) * cnt);
771 f->entry_capacity = cnt;
772 }
773
774 t = (struct tree_content*)f;
775 t->entry_count = 0;
776 t->delta_depth = 0;
777 return t;
778 }
779
780 static void release_tree_entry(struct tree_entry *e);
781 static void release_tree_content(struct tree_content *t)
782 {
783 struct avail_tree_content *f = (struct avail_tree_content*)t;
784 unsigned int hc = hc_entries(f->entry_capacity);
785 f->next_avail = avail_tree_table[hc];
786 avail_tree_table[hc] = f;
787 }
788
789 static void release_tree_content_recursive(struct tree_content *t)
790 {
791 unsigned int i;
792 for (i = 0; i < t->entry_count; i++)
793 release_tree_entry(t->entries[i]);
794 release_tree_content(t);
795 }
796
797 static struct tree_content *grow_tree_content(
798 struct tree_content *t,
799 int amt)
800 {
801 struct tree_content *r = new_tree_content(t->entry_count + amt);
802 r->entry_count = t->entry_count;
803 r->delta_depth = t->delta_depth;
804 memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
805 release_tree_content(t);
806 return r;
807 }
808
809 static struct tree_entry *new_tree_entry(void)
810 {
811 struct tree_entry *e;
812
813 if (!avail_tree_entry) {
814 unsigned int n = tree_entry_alloc;
815 total_allocd += n * sizeof(struct tree_entry);
816 avail_tree_entry = e = xmalloc(n * sizeof(struct tree_entry));
817 while (n-- > 1) {
818 *((void**)e) = e + 1;
819 e++;
820 }
821 *((void**)e) = NULL;
822 }
823
824 e = avail_tree_entry;
825 avail_tree_entry = *((void**)e);
826 return e;
827 }
828
829 static void release_tree_entry(struct tree_entry *e)
830 {
831 if (e->tree)
832 release_tree_content_recursive(e->tree);
833 *((void**)e) = avail_tree_entry;
834 avail_tree_entry = e;
835 }
836
837 static struct tree_content *dup_tree_content(struct tree_content *s)
838 {
839 struct tree_content *d;
840 struct tree_entry *a, *b;
841 unsigned int i;
842
843 if (!s)
844 return NULL;
845 d = new_tree_content(s->entry_count);
846 for (i = 0; i < s->entry_count; i++) {
847 a = s->entries[i];
848 b = new_tree_entry();
849 memcpy(b, a, sizeof(*a));
850 if (a->tree && is_null_sha1(b->versions[1].sha1))
851 b->tree = dup_tree_content(a->tree);
852 else
853 b->tree = NULL;
854 d->entries[i] = b;
855 }
856 d->entry_count = s->entry_count;
857 d->delta_depth = s->delta_depth;
858
859 return d;
860 }
861
862 static void start_packfile(void)
863 {
864 static char tmpfile[PATH_MAX];
865 struct packed_git *p;
866 struct pack_header hdr;
867 int pack_fd;
868
869 pack_fd = odb_mkstemp(tmpfile, sizeof(tmpfile),
870 "pack/tmp_pack_XXXXXX");
871 p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
872 strcpy(p->pack_name, tmpfile);
873 p->pack_fd = pack_fd;
874 pack_file = sha1fd(pack_fd, p->pack_name);
875
876 hdr.hdr_signature = htonl(PACK_SIGNATURE);
877 hdr.hdr_version = htonl(2);
878 hdr.hdr_entries = 0;
879 sha1write(pack_file, &hdr, sizeof(hdr));
880
881 pack_data = p;
882 pack_size = sizeof(hdr);
883 object_count = 0;
884
885 all_packs = xrealloc(all_packs, sizeof(*all_packs) * (pack_id + 1));
886 all_packs[pack_id] = p;
887 }
888
889 static const char *create_index(void)
890 {
891 const char *tmpfile;
892 struct pack_idx_entry **idx, **c, **last;
893 struct object_entry *e;
894 struct object_entry_pool *o;
895
896 /* Build the table of object IDs. */
897 idx = xmalloc(object_count * sizeof(*idx));
898 c = idx;
899 for (o = blocks; o; o = o->next_pool)
900 for (e = o->next_free; e-- != o->entries;)
901 if (pack_id == e->pack_id)
902 *c++ = &e->idx;
903 last = idx + object_count;
904 if (c != last)
905 die("internal consistency error creating the index");
906
907 tmpfile = write_idx_file(NULL, idx, object_count, pack_data->sha1);
908 free(idx);
909 return tmpfile;
910 }
911
912 static char *keep_pack(const char *curr_index_name)
913 {
914 static char name[PATH_MAX];
915 static const char *keep_msg = "fast-import";
916 int keep_fd;
917
918 keep_fd = odb_pack_keep(name, sizeof(name), pack_data->sha1);
919 if (keep_fd < 0)
920 die_errno("cannot create keep file");
921 write_or_die(keep_fd, keep_msg, strlen(keep_msg));
922 if (close(keep_fd))
923 die_errno("failed to write keep file");
924
925 snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
926 get_object_directory(), sha1_to_hex(pack_data->sha1));
927 if (move_temp_to_file(pack_data->pack_name, name))
928 die("cannot store pack file");
929
930 snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
931 get_object_directory(), sha1_to_hex(pack_data->sha1));
932 if (move_temp_to_file(curr_index_name, name))
933 die("cannot store index file");
934 free((void *)curr_index_name);
935 return name;
936 }
937
938 static void unkeep_all_packs(void)
939 {
940 static char name[PATH_MAX];
941 int k;
942
943 for (k = 0; k < pack_id; k++) {
944 struct packed_git *p = all_packs[k];
945 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
946 get_object_directory(), sha1_to_hex(p->sha1));
947 unlink_or_warn(name);
948 }
949 }
950
951 static void end_packfile(void)
952 {
953 struct packed_git *old_p = pack_data, *new_p;
954
955 clear_delta_base_cache();
956 if (object_count) {
957 unsigned char cur_pack_sha1[20];
958 char *idx_name;
959 int i;
960 struct branch *b;
961 struct tag *t;
962
963 close_pack_windows(pack_data);
964 sha1close(pack_file, cur_pack_sha1, 0);
965 fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
966 pack_data->pack_name, object_count,
967 cur_pack_sha1, pack_size);
968 close(pack_data->pack_fd);
969 idx_name = keep_pack(create_index());
970
971 /* Register the packfile with core git's machinery. */
972 new_p = add_packed_git(idx_name, strlen(idx_name), 1);
973 if (!new_p)
974 die("core git rejected index %s", idx_name);
975 all_packs[pack_id] = new_p;
976 install_packed_git(new_p);
977
978 /* Print the boundary */
979 if (pack_edges) {
980 fprintf(pack_edges, "%s:", new_p->pack_name);
981 for (i = 0; i < branch_table_sz; i++) {
982 for (b = branch_table[i]; b; b = b->table_next_branch) {
983 if (b->pack_id == pack_id)
984 fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
985 }
986 }
987 for (t = first_tag; t; t = t->next_tag) {
988 if (t->pack_id == pack_id)
989 fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
990 }
991 fputc('\n', pack_edges);
992 fflush(pack_edges);
993 }
994
995 pack_id++;
996 }
997 else {
998 close(old_p->pack_fd);
999 unlink_or_warn(old_p->pack_name);
1000 }
1001 free(old_p);
1002
1003 /* We can't carry a delta across packfiles. */
1004 strbuf_release(&last_blob.data);
1005 last_blob.offset = 0;
1006 last_blob.depth = 0;
1007 }
1008
1009 static void cycle_packfile(void)
1010 {
1011 end_packfile();
1012 start_packfile();
1013 }
1014
1015 static int store_object(
1016 enum object_type type,
1017 struct strbuf *dat,
1018 struct last_object *last,
1019 unsigned char *sha1out,
1020 uintmax_t mark)
1021 {
1022 void *out, *delta;
1023 struct object_entry *e;
1024 unsigned char hdr[96];
1025 unsigned char sha1[20];
1026 unsigned long hdrlen, deltalen;
1027 git_SHA_CTX c;
1028 z_stream s;
1029
1030 hdrlen = sprintf((char *)hdr,"%s %lu", typename(type),
1031 (unsigned long)dat->len) + 1;
1032 git_SHA1_Init(&c);
1033 git_SHA1_Update(&c, hdr, hdrlen);
1034 git_SHA1_Update(&c, dat->buf, dat->len);
1035 git_SHA1_Final(sha1, &c);
1036 if (sha1out)
1037 hashcpy(sha1out, sha1);
1038
1039 e = insert_object(sha1);
1040 if (mark)
1041 insert_mark(mark, e);
1042 if (e->idx.offset) {
1043 duplicate_count_by_type[type]++;
1044 return 1;
1045 } else if (find_sha1_pack(sha1, packed_git)) {
1046 e->type = type;
1047 e->pack_id = MAX_PACK_ID;
1048 e->idx.offset = 1; /* just not zero! */
1049 duplicate_count_by_type[type]++;
1050 return 1;
1051 }
1052
1053 if (last && last->data.buf && last->depth < max_depth && dat->len > 20) {
1054 delta = diff_delta(last->data.buf, last->data.len,
1055 dat->buf, dat->len,
1056 &deltalen, dat->len - 20);
1057 } else
1058 delta = NULL;
1059
1060 memset(&s, 0, sizeof(s));
1061 deflateInit(&s, pack_compression_level);
1062 if (delta) {
1063 s.next_in = delta;
1064 s.avail_in = deltalen;
1065 } else {
1066 s.next_in = (void *)dat->buf;
1067 s.avail_in = dat->len;
1068 }
1069 s.avail_out = deflateBound(&s, s.avail_in);
1070 s.next_out = out = xmalloc(s.avail_out);
1071 while (deflate(&s, Z_FINISH) == Z_OK)
1072 /* nothing */;
1073 deflateEnd(&s);
1074
1075 /* Determine if we should auto-checkpoint. */
1076 if ((max_packsize && (pack_size + 60 + s.total_out) > max_packsize)
1077 || (pack_size + 60 + s.total_out) < pack_size) {
1078
1079 /* This new object needs to *not* have the current pack_id. */
1080 e->pack_id = pack_id + 1;
1081 cycle_packfile();
1082
1083 /* We cannot carry a delta into the new pack. */
1084 if (delta) {
1085 free(delta);
1086 delta = NULL;
1087
1088 memset(&s, 0, sizeof(s));
1089 deflateInit(&s, pack_compression_level);
1090 s.next_in = (void *)dat->buf;
1091 s.avail_in = dat->len;
1092 s.avail_out = deflateBound(&s, s.avail_in);
1093 s.next_out = out = xrealloc(out, s.avail_out);
1094 while (deflate(&s, Z_FINISH) == Z_OK)
1095 /* nothing */;
1096 deflateEnd(&s);
1097 }
1098 }
1099
1100 e->type = type;
1101 e->pack_id = pack_id;
1102 e->idx.offset = pack_size;
1103 object_count++;
1104 object_count_by_type[type]++;
1105
1106 crc32_begin(pack_file);
1107
1108 if (delta) {
1109 off_t ofs = e->idx.offset - last->offset;
1110 unsigned pos = sizeof(hdr) - 1;
1111
1112 delta_count_by_type[type]++;
1113 e->depth = last->depth + 1;
1114
1115 hdrlen = encode_in_pack_object_header(OBJ_OFS_DELTA, deltalen, hdr);
1116 sha1write(pack_file, hdr, hdrlen);
1117 pack_size += hdrlen;
1118
1119 hdr[pos] = ofs & 127;
1120 while (ofs >>= 7)
1121 hdr[--pos] = 128 | (--ofs & 127);
1122 sha1write(pack_file, hdr + pos, sizeof(hdr) - pos);
1123 pack_size += sizeof(hdr) - pos;
1124 } else {
1125 e->depth = 0;
1126 hdrlen = encode_in_pack_object_header(type, dat->len, hdr);
1127 sha1write(pack_file, hdr, hdrlen);
1128 pack_size += hdrlen;
1129 }
1130
1131 sha1write(pack_file, out, s.total_out);
1132 pack_size += s.total_out;
1133
1134 e->idx.crc32 = crc32_end(pack_file);
1135
1136 free(out);
1137 free(delta);
1138 if (last) {
1139 if (last->no_swap) {
1140 last->data = *dat;
1141 } else {
1142 strbuf_swap(&last->data, dat);
1143 }
1144 last->offset = e->idx.offset;
1145 last->depth = e->depth;
1146 }
1147 return 0;
1148 }
1149
1150 static void truncate_pack(off_t to, git_SHA_CTX *ctx)
1151 {
1152 if (ftruncate(pack_data->pack_fd, to)
1153 || lseek(pack_data->pack_fd, to, SEEK_SET) != to)
1154 die_errno("cannot truncate pack to skip duplicate");
1155 pack_size = to;
1156
1157 /* yes this is a layering violation */
1158 pack_file->total = to;
1159 pack_file->offset = 0;
1160 pack_file->ctx = *ctx;
1161 }
1162
1163 static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark)
1164 {
1165 size_t in_sz = 64 * 1024, out_sz = 64 * 1024;
1166 unsigned char *in_buf = xmalloc(in_sz);
1167 unsigned char *out_buf = xmalloc(out_sz);
1168 struct object_entry *e;
1169 unsigned char sha1[20];
1170 unsigned long hdrlen;
1171 off_t offset;
1172 git_SHA_CTX c;
1173 git_SHA_CTX pack_file_ctx;
1174 z_stream s;
1175 int status = Z_OK;
1176
1177 /* Determine if we should auto-checkpoint. */
1178 if ((max_packsize && (pack_size + 60 + len) > max_packsize)
1179 || (pack_size + 60 + len) < pack_size)
1180 cycle_packfile();
1181
1182 offset = pack_size;
1183
1184 /* preserve the pack_file SHA1 ctx in case we have to truncate later */
1185 sha1flush(pack_file);
1186 pack_file_ctx = pack_file->ctx;
1187
1188 hdrlen = snprintf((char *)out_buf, out_sz, "blob %" PRIuMAX, len) + 1;
1189 if (out_sz <= hdrlen)
1190 die("impossibly large object header");
1191
1192 git_SHA1_Init(&c);
1193 git_SHA1_Update(&c, out_buf, hdrlen);
1194
1195 crc32_begin(pack_file);
1196
1197 memset(&s, 0, sizeof(s));
1198 deflateInit(&s, pack_compression_level);
1199
1200 hdrlen = encode_in_pack_object_header(OBJ_BLOB, len, out_buf);
1201 if (out_sz <= hdrlen)
1202 die("impossibly large object header");
1203
1204 s.next_out = out_buf + hdrlen;
1205 s.avail_out = out_sz - hdrlen;
1206
1207 while (status != Z_STREAM_END) {
1208 if (0 < len && !s.avail_in) {
1209 size_t cnt = in_sz < len ? in_sz : (size_t)len;
1210 size_t n = fread(in_buf, 1, cnt, stdin);
1211 if (!n && feof(stdin))
1212 die("EOF in data (%" PRIuMAX " bytes remaining)", len);
1213
1214 git_SHA1_Update(&c, in_buf, n);
1215 s.next_in = in_buf;
1216 s.avail_in = n;
1217 len -= n;
1218 }
1219
1220 status = deflate(&s, len ? 0 : Z_FINISH);
1221
1222 if (!s.avail_out || status == Z_STREAM_END) {
1223 size_t n = s.next_out - out_buf;
1224 sha1write(pack_file, out_buf, n);
1225 pack_size += n;
1226 s.next_out = out_buf;
1227 s.avail_out = out_sz;
1228 }
1229
1230 switch (status) {
1231 case Z_OK:
1232 case Z_BUF_ERROR:
1233 case Z_STREAM_END:
1234 continue;
1235 default:
1236 die("unexpected deflate failure: %d", status);
1237 }
1238 }
1239 deflateEnd(&s);
1240 git_SHA1_Final(sha1, &c);
1241
1242 if (sha1out)
1243 hashcpy(sha1out, sha1);
1244
1245 e = insert_object(sha1);
1246
1247 if (mark)
1248 insert_mark(mark, e);
1249
1250 if (e->idx.offset) {
1251 duplicate_count_by_type[OBJ_BLOB]++;
1252 truncate_pack(offset, &pack_file_ctx);
1253
1254 } else if (find_sha1_pack(sha1, packed_git)) {
1255 e->type = OBJ_BLOB;
1256 e->pack_id = MAX_PACK_ID;
1257 e->idx.offset = 1; /* just not zero! */
1258 duplicate_count_by_type[OBJ_BLOB]++;
1259 truncate_pack(offset, &pack_file_ctx);
1260
1261 } else {
1262 e->depth = 0;
1263 e->type = OBJ_BLOB;
1264 e->pack_id = pack_id;
1265 e->idx.offset = offset;
1266 e->idx.crc32 = crc32_end(pack_file);
1267 object_count++;
1268 object_count_by_type[OBJ_BLOB]++;
1269 }
1270
1271 free(in_buf);
1272 free(out_buf);
1273 }
1274
1275 /* All calls must be guarded by find_object() or find_mark() to
1276 * ensure the 'struct object_entry' passed was written by this
1277 * process instance. We unpack the entry by the offset, avoiding
1278 * the need for the corresponding .idx file. This unpacking rule
1279 * works because we only use OBJ_REF_DELTA within the packfiles
1280 * created by fast-import.
1281 *
1282 * oe must not be NULL. Such an oe usually comes from giving
1283 * an unknown SHA-1 to find_object() or an undefined mark to
1284 * find_mark(). Callers must test for this condition and use
1285 * the standard read_sha1_file() when it happens.
1286 *
1287 * oe->pack_id must not be MAX_PACK_ID. Such an oe is usually from
1288 * find_mark(), where the mark was reloaded from an existing marks
1289 * file and is referencing an object that this fast-import process
1290 * instance did not write out to a packfile. Callers must test for
1291 * this condition and use read_sha1_file() instead.
1292 */
1293 static void *gfi_unpack_entry(
1294 struct object_entry *oe,
1295 unsigned long *sizep)
1296 {
1297 enum object_type type;
1298 struct packed_git *p = all_packs[oe->pack_id];
1299 if (p == pack_data && p->pack_size < (pack_size + 20)) {
1300 /* The object is stored in the packfile we are writing to
1301 * and we have modified it since the last time we scanned
1302 * back to read a previously written object. If an old
1303 * window covered [p->pack_size, p->pack_size + 20) its
1304 * data is stale and is not valid. Closing all windows
1305 * and updating the packfile length ensures we can read
1306 * the newly written data.
1307 */
1308 close_pack_windows(p);
1309 sha1flush(pack_file);
1310
1311 /* We have to offer 20 bytes additional on the end of
1312 * the packfile as the core unpacker code assumes the
1313 * footer is present at the file end and must promise
1314 * at least 20 bytes within any window it maps. But
1315 * we don't actually create the footer here.
1316 */
1317 p->pack_size = pack_size + 20;
1318 }
1319 return unpack_entry(p, oe->idx.offset, &type, sizep);
1320 }
1321
1322 static const char *get_mode(const char *str, uint16_t *modep)
1323 {
1324 unsigned char c;
1325 uint16_t mode = 0;
1326
1327 while ((c = *str++) != ' ') {
1328 if (c < '0' || c > '7')
1329 return NULL;
1330 mode = (mode << 3) + (c - '0');
1331 }
1332 *modep = mode;
1333 return str;
1334 }
1335
1336 static void load_tree(struct tree_entry *root)
1337 {
1338 unsigned char *sha1 = root->versions[1].sha1;
1339 struct object_entry *myoe;
1340 struct tree_content *t;
1341 unsigned long size;
1342 char *buf;
1343 const char *c;
1344
1345 root->tree = t = new_tree_content(8);
1346 if (is_null_sha1(sha1))
1347 return;
1348
1349 myoe = find_object(sha1);
1350 if (myoe && myoe->pack_id != MAX_PACK_ID) {
1351 if (myoe->type != OBJ_TREE)
1352 die("Not a tree: %s", sha1_to_hex(sha1));
1353 t->delta_depth = myoe->depth;
1354 buf = gfi_unpack_entry(myoe, &size);
1355 if (!buf)
1356 die("Can't load tree %s", sha1_to_hex(sha1));
1357 } else {
1358 enum object_type type;
1359 buf = read_sha1_file(sha1, &type, &size);
1360 if (!buf || type != OBJ_TREE)
1361 die("Can't load tree %s", sha1_to_hex(sha1));
1362 }
1363
1364 c = buf;
1365 while (c != (buf + size)) {
1366 struct tree_entry *e = new_tree_entry();
1367
1368 if (t->entry_count == t->entry_capacity)
1369 root->tree = t = grow_tree_content(t, t->entry_count);
1370 t->entries[t->entry_count++] = e;
1371
1372 e->tree = NULL;
1373 c = get_mode(c, &e->versions[1].mode);
1374 if (!c)
1375 die("Corrupt mode in %s", sha1_to_hex(sha1));
1376 e->versions[0].mode = e->versions[1].mode;
1377 e->name = to_atom(c, strlen(c));
1378 c += e->name->str_len + 1;
1379 hashcpy(e->versions[0].sha1, (unsigned char *)c);
1380 hashcpy(e->versions[1].sha1, (unsigned char *)c);
1381 c += 20;
1382 }
1383 free(buf);
1384 }
1385
1386 static int tecmp0 (const void *_a, const void *_b)
1387 {
1388 struct tree_entry *a = *((struct tree_entry**)_a);
1389 struct tree_entry *b = *((struct tree_entry**)_b);
1390 return base_name_compare(
1391 a->name->str_dat, a->name->str_len, a->versions[0].mode,
1392 b->name->str_dat, b->name->str_len, b->versions[0].mode);
1393 }
1394
1395 static int tecmp1 (const void *_a, const void *_b)
1396 {
1397 struct tree_entry *a = *((struct tree_entry**)_a);
1398 struct tree_entry *b = *((struct tree_entry**)_b);
1399 return base_name_compare(
1400 a->name->str_dat, a->name->str_len, a->versions[1].mode,
1401 b->name->str_dat, b->name->str_len, b->versions[1].mode);
1402 }
1403
1404 static void mktree(struct tree_content *t, int v, struct strbuf *b)
1405 {
1406 size_t maxlen = 0;
1407 unsigned int i;
1408
1409 if (!v)
1410 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0);
1411 else
1412 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1);
1413
1414 for (i = 0; i < t->entry_count; i++) {
1415 if (t->entries[i]->versions[v].mode)
1416 maxlen += t->entries[i]->name->str_len + 34;
1417 }
1418
1419 strbuf_reset(b);
1420 strbuf_grow(b, maxlen);
1421 for (i = 0; i < t->entry_count; i++) {
1422 struct tree_entry *e = t->entries[i];
1423 if (!e->versions[v].mode)
1424 continue;
1425 strbuf_addf(b, "%o %s%c", (unsigned int)e->versions[v].mode,
1426 e->name->str_dat, '\0');
1427 strbuf_add(b, e->versions[v].sha1, 20);
1428 }
1429 }
1430
1431 static void store_tree(struct tree_entry *root)
1432 {
1433 struct tree_content *t = root->tree;
1434 unsigned int i, j, del;
1435 struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 };
1436 struct object_entry *le;
1437
1438 if (!is_null_sha1(root->versions[1].sha1))
1439 return;
1440
1441 for (i = 0; i < t->entry_count; i++) {
1442 if (t->entries[i]->tree)
1443 store_tree(t->entries[i]);
1444 }
1445
1446 le = find_object(root->versions[0].sha1);
1447 if (S_ISDIR(root->versions[0].mode) && le && le->pack_id == pack_id) {
1448 mktree(t, 0, &old_tree);
1449 lo.data = old_tree;
1450 lo.offset = le->idx.offset;
1451 lo.depth = t->delta_depth;
1452 }
1453
1454 mktree(t, 1, &new_tree);
1455 store_object(OBJ_TREE, &new_tree, &lo, root->versions[1].sha1, 0);
1456
1457 t->delta_depth = lo.depth;
1458 for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
1459 struct tree_entry *e = t->entries[i];
1460 if (e->versions[1].mode) {
1461 e->versions[0].mode = e->versions[1].mode;
1462 hashcpy(e->versions[0].sha1, e->versions[1].sha1);
1463 t->entries[j++] = e;
1464 } else {
1465 release_tree_entry(e);
1466 del++;
1467 }
1468 }
1469 t->entry_count -= del;
1470 }
1471
1472 static void tree_content_replace(
1473 struct tree_entry *root,
1474 const unsigned char *sha1,
1475 const uint16_t mode,
1476 struct tree_content *newtree)
1477 {
1478 if (!S_ISDIR(mode))
1479 die("Root cannot be a non-directory");
1480 hashcpy(root->versions[1].sha1, sha1);
1481 if (root->tree)
1482 release_tree_content_recursive(root->tree);
1483 root->tree = newtree;
1484 }
1485
1486 static int tree_content_set(
1487 struct tree_entry *root,
1488 const char *p,
1489 const unsigned char *sha1,
1490 const uint16_t mode,
1491 struct tree_content *subtree)
1492 {
1493 struct tree_content *t;
1494 const char *slash1;
1495 unsigned int i, n;
1496 struct tree_entry *e;
1497
1498 slash1 = strchr(p, '/');
1499 if (slash1)
1500 n = slash1 - p;
1501 else
1502 n = strlen(p);
1503 if (!n)
1504 die("Empty path component found in input");
1505 if (!slash1 && !S_ISDIR(mode) && subtree)
1506 die("Non-directories cannot have subtrees");
1507
1508 if (!root->tree)
1509 load_tree(root);
1510 t = root->tree;
1511 for (i = 0; i < t->entry_count; i++) {
1512 e = t->entries[i];
1513 if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) {
1514 if (!slash1) {
1515 if (!S_ISDIR(mode)
1516 && e->versions[1].mode == mode
1517 && !hashcmp(e->versions[1].sha1, sha1))
1518 return 0;
1519 e->versions[1].mode = mode;
1520 hashcpy(e->versions[1].sha1, sha1);
1521 if (e->tree)
1522 release_tree_content_recursive(e->tree);
1523 e->tree = subtree;
1524 hashclr(root->versions[1].sha1);
1525 return 1;
1526 }
1527 if (!S_ISDIR(e->versions[1].mode)) {
1528 e->tree = new_tree_content(8);
1529 e->versions[1].mode = S_IFDIR;
1530 }
1531 if (!e->tree)
1532 load_tree(e);
1533 if (tree_content_set(e, slash1 + 1, sha1, mode, subtree)) {
1534 hashclr(root->versions[1].sha1);
1535 return 1;
1536 }
1537 return 0;
1538 }
1539 }
1540
1541 if (t->entry_count == t->entry_capacity)
1542 root->tree = t = grow_tree_content(t, t->entry_count);
1543 e = new_tree_entry();
1544 e->name = to_atom(p, n);
1545 e->versions[0].mode = 0;
1546 hashclr(e->versions[0].sha1);
1547 t->entries[t->entry_count++] = e;
1548 if (slash1) {
1549 e->tree = new_tree_content(8);
1550 e->versions[1].mode = S_IFDIR;
1551 tree_content_set(e, slash1 + 1, sha1, mode, subtree);
1552 } else {
1553 e->tree = subtree;
1554 e->versions[1].mode = mode;
1555 hashcpy(e->versions[1].sha1, sha1);
1556 }
1557 hashclr(root->versions[1].sha1);
1558 return 1;
1559 }
1560
1561 static int tree_content_remove(
1562 struct tree_entry *root,
1563 const char *p,
1564 struct tree_entry *backup_leaf)
1565 {
1566 struct tree_content *t;
1567 const char *slash1;
1568 unsigned int i, n;
1569 struct tree_entry *e;
1570
1571 slash1 = strchr(p, '/');
1572 if (slash1)
1573 n = slash1 - p;
1574 else
1575 n = strlen(p);
1576
1577 if (!root->tree)
1578 load_tree(root);
1579 t = root->tree;
1580 for (i = 0; i < t->entry_count; i++) {
1581 e = t->entries[i];
1582 if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) {
1583 if (slash1 && !S_ISDIR(e->versions[1].mode))
1584 /*
1585 * If p names a file in some subdirectory, and a
1586 * file or symlink matching the name of the
1587 * parent directory of p exists, then p cannot
1588 * exist and need not be deleted.
1589 */
1590 return 1;
1591 if (!slash1 || !S_ISDIR(e->versions[1].mode))
1592 goto del_entry;
1593 if (!e->tree)
1594 load_tree(e);
1595 if (tree_content_remove(e, slash1 + 1, backup_leaf)) {
1596 for (n = 0; n < e->tree->entry_count; n++) {
1597 if (e->tree->entries[n]->versions[1].mode) {
1598 hashclr(root->versions[1].sha1);
1599 return 1;
1600 }
1601 }
1602 backup_leaf = NULL;
1603 goto del_entry;
1604 }
1605 return 0;
1606 }
1607 }
1608 return 0;
1609
1610 del_entry:
1611 if (backup_leaf)
1612 memcpy(backup_leaf, e, sizeof(*backup_leaf));
1613 else if (e->tree)
1614 release_tree_content_recursive(e->tree);
1615 e->tree = NULL;
1616 e->versions[1].mode = 0;
1617 hashclr(e->versions[1].sha1);
1618 hashclr(root->versions[1].sha1);
1619 return 1;
1620 }
1621
1622 static int tree_content_get(
1623 struct tree_entry *root,
1624 const char *p,
1625 struct tree_entry *leaf)
1626 {
1627 struct tree_content *t;
1628 const char *slash1;
1629 unsigned int i, n;
1630 struct tree_entry *e;
1631
1632 slash1 = strchr(p, '/');
1633 if (slash1)
1634 n = slash1 - p;
1635 else
1636 n = strlen(p);
1637
1638 if (!root->tree)
1639 load_tree(root);
1640 t = root->tree;
1641 for (i = 0; i < t->entry_count; i++) {
1642 e = t->entries[i];
1643 if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) {
1644 if (!slash1) {
1645 memcpy(leaf, e, sizeof(*leaf));
1646 if (e->tree && is_null_sha1(e->versions[1].sha1))
1647 leaf->tree = dup_tree_content(e->tree);
1648 else
1649 leaf->tree = NULL;
1650 return 1;
1651 }
1652 if (!S_ISDIR(e->versions[1].mode))
1653 return 0;
1654 if (!e->tree)
1655 load_tree(e);
1656 return tree_content_get(e, slash1 + 1, leaf);
1657 }
1658 }
1659 return 0;
1660 }
1661
1662 static int update_branch(struct branch *b)
1663 {
1664 static const char *msg = "fast-import";
1665 struct ref_lock *lock;
1666 unsigned char old_sha1[20];
1667
1668 if (is_null_sha1(b->sha1))
1669 return 0;
1670 if (read_ref(b->name, old_sha1))
1671 hashclr(old_sha1);
1672 lock = lock_any_ref_for_update(b->name, old_sha1, 0);
1673 if (!lock)
1674 return error("Unable to lock %s", b->name);
1675 if (!force_update && !is_null_sha1(old_sha1)) {
1676 struct commit *old_cmit, *new_cmit;
1677
1678 old_cmit = lookup_commit_reference_gently(old_sha1, 0);
1679 new_cmit = lookup_commit_reference_gently(b->sha1, 0);
1680 if (!old_cmit || !new_cmit) {
1681 unlock_ref(lock);
1682 return error("Branch %s is missing commits.", b->name);
1683 }
1684
1685 if (!in_merge_bases(old_cmit, &new_cmit, 1)) {
1686 unlock_ref(lock);
1687 warning("Not updating %s"
1688 " (new tip %s does not contain %s)",
1689 b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
1690 return -1;
1691 }
1692 }
1693 if (write_ref_sha1(lock, b->sha1, msg) < 0)
1694 return error("Unable to update %s", b->name);
1695 return 0;
1696 }
1697
1698 static void dump_branches(void)
1699 {
1700 unsigned int i;
1701 struct branch *b;
1702
1703 for (i = 0; i < branch_table_sz; i++) {
1704 for (b = branch_table[i]; b; b = b->table_next_branch)
1705 failure |= update_branch(b);
1706 }
1707 }
1708
1709 static void dump_tags(void)
1710 {
1711 static const char *msg = "fast-import";
1712 struct tag *t;
1713 struct ref_lock *lock;
1714 char ref_name[PATH_MAX];
1715
1716 for (t = first_tag; t; t = t->next_tag) {
1717 sprintf(ref_name, "tags/%s", t->name);
1718 lock = lock_ref_sha1(ref_name, NULL);
1719 if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0)
1720 failure |= error("Unable to update %s", ref_name);
1721 }
1722 }
1723
1724 static void dump_marks_helper(FILE *f,
1725 uintmax_t base,
1726 struct mark_set *m)
1727 {
1728 uintmax_t k;
1729 if (m->shift) {
1730 for (k = 0; k < 1024; k++) {
1731 if (m->data.sets[k])
1732 dump_marks_helper(f, base + (k << m->shift),
1733 m->data.sets[k]);
1734 }
1735 } else {
1736 for (k = 0; k < 1024; k++) {
1737 if (m->data.marked[k])
1738 fprintf(f, ":%" PRIuMAX " %s\n", base + k,
1739 sha1_to_hex(m->data.marked[k]->idx.sha1));
1740 }
1741 }
1742 }
1743
1744 static void dump_marks(void)
1745 {
1746 static struct lock_file mark_lock;
1747 int mark_fd;
1748 FILE *f;
1749
1750 if (!export_marks_file)
1751 return;
1752
1753 mark_fd = hold_lock_file_for_update(&mark_lock, export_marks_file, 0);
1754 if (mark_fd < 0) {
1755 failure |= error("Unable to write marks file %s: %s",
1756 export_marks_file, strerror(errno));
1757 return;
1758 }
1759
1760 f = fdopen(mark_fd, "w");
1761 if (!f) {
1762 int saved_errno = errno;
1763 rollback_lock_file(&mark_lock);
1764 failure |= error("Unable to write marks file %s: %s",
1765 export_marks_file, strerror(saved_errno));
1766 return;
1767 }
1768
1769 /*
1770 * Since the lock file was fdopen()'ed, it should not be close()'ed.
1771 * Assign -1 to the lock file descriptor so that commit_lock_file()
1772 * won't try to close() it.
1773 */
1774 mark_lock.fd = -1;
1775
1776 dump_marks_helper(f, 0, marks);
1777 if (ferror(f) || fclose(f)) {
1778 int saved_errno = errno;
1779 rollback_lock_file(&mark_lock);
1780 failure |= error("Unable to write marks file %s: %s",
1781 export_marks_file, strerror(saved_errno));
1782 return;
1783 }
1784
1785 if (commit_lock_file(&mark_lock)) {
1786 int saved_errno = errno;
1787 rollback_lock_file(&mark_lock);
1788 failure |= error("Unable to commit marks file %s: %s",
1789 export_marks_file, strerror(saved_errno));
1790 return;
1791 }
1792 }
1793
1794 static void read_marks(void)
1795 {
1796 char line[512];
1797 FILE *f = fopen(import_marks_file, "r");
1798 if (!f)
1799 die_errno("cannot read '%s'", import_marks_file);
1800 while (fgets(line, sizeof(line), f)) {
1801 uintmax_t mark;
1802 char *end;
1803 unsigned char sha1[20];
1804 struct object_entry *e;
1805
1806 end = strchr(line, '\n');
1807 if (line[0] != ':' || !end)
1808 die("corrupt mark line: %s", line);
1809 *end = 0;
1810 mark = strtoumax(line + 1, &end, 10);
1811 if (!mark || end == line + 1
1812 || *end != ' ' || get_sha1(end + 1, sha1))
1813 die("corrupt mark line: %s", line);
1814 e = find_object(sha1);
1815 if (!e) {
1816 enum object_type type = sha1_object_info(sha1, NULL);
1817 if (type < 0)
1818 die("object not found: %s", sha1_to_hex(sha1));
1819 e = insert_object(sha1);
1820 e->type = type;
1821 e->pack_id = MAX_PACK_ID;
1822 e->idx.offset = 1; /* just not zero! */
1823 }
1824 insert_mark(mark, e);
1825 }
1826 fclose(f);
1827 }
1828
1829
1830 static int read_next_command(void)
1831 {
1832 static int stdin_eof = 0;
1833
1834 if (stdin_eof) {
1835 unread_command_buf = 0;
1836 return EOF;
1837 }
1838
1839 for (;;) {
1840 if (unread_command_buf) {
1841 unread_command_buf = 0;
1842 } else {
1843 struct recent_command *rc;
1844
1845 strbuf_detach(&command_buf, NULL);
1846 stdin_eof = strbuf_getline(&command_buf, stdin, '\n');
1847 if (stdin_eof)
1848 return EOF;
1849
1850 if (!seen_data_command
1851 && prefixcmp(command_buf.buf, "feature ")
1852 && prefixcmp(command_buf.buf, "option ")) {
1853 parse_argv();
1854 }
1855
1856 rc = rc_free;
1857 if (rc)
1858 rc_free = rc->next;
1859 else {
1860 rc = cmd_hist.next;
1861 cmd_hist.next = rc->next;
1862 cmd_hist.next->prev = &cmd_hist;
1863 free(rc->buf);
1864 }
1865
1866 rc->buf = command_buf.buf;
1867 rc->prev = cmd_tail;
1868 rc->next = cmd_hist.prev;
1869 rc->prev->next = rc;
1870 cmd_tail = rc;
1871 }
1872 if (!prefixcmp(command_buf.buf, "cat-blob ")) {
1873 parse_cat_blob();
1874 continue;
1875 }
1876 if (command_buf.buf[0] == '#')
1877 continue;
1878 return 0;
1879 }
1880 }
1881
1882 static void skip_optional_lf(void)
1883 {
1884 int term_char = fgetc(stdin);
1885 if (term_char != '\n' && term_char != EOF)
1886 ungetc(term_char, stdin);
1887 }
1888
1889 static void parse_mark(void)
1890 {
1891 if (!prefixcmp(command_buf.buf, "mark :")) {
1892 next_mark = strtoumax(command_buf.buf + 6, NULL, 10);
1893 read_next_command();
1894 }
1895 else
1896 next_mark = 0;
1897 }
1898
1899 static int parse_data(struct strbuf *sb, uintmax_t limit, uintmax_t *len_res)
1900 {
1901 strbuf_reset(sb);
1902
1903 if (prefixcmp(command_buf.buf, "data "))
1904 die("Expected 'data n' command, found: %s", command_buf.buf);
1905
1906 if (!prefixcmp(command_buf.buf + 5, "<<")) {
1907 char *term = xstrdup(command_buf.buf + 5 + 2);
1908 size_t term_len = command_buf.len - 5 - 2;
1909
1910 strbuf_detach(&command_buf, NULL);
1911 for (;;) {
1912 if (strbuf_getline(&command_buf, stdin, '\n') == EOF)
1913 die("EOF in data (terminator '%s' not found)", term);
1914 if (term_len == command_buf.len
1915 && !strcmp(term, command_buf.buf))
1916 break;
1917 strbuf_addbuf(sb, &command_buf);
1918 strbuf_addch(sb, '\n');
1919 }
1920 free(term);
1921 }
1922 else {
1923 uintmax_t len = strtoumax(command_buf.buf + 5, NULL, 10);
1924 size_t n = 0, length = (size_t)len;
1925
1926 if (limit && limit < len) {
1927 *len_res = len;
1928 return 0;
1929 }
1930 if (length < len)
1931 die("data is too large to use in this context");
1932
1933 while (n < length) {
1934 size_t s = strbuf_fread(sb, length - n, stdin);
1935 if (!s && feof(stdin))
1936 die("EOF in data (%lu bytes remaining)",
1937 (unsigned long)(length - n));
1938 n += s;
1939 }
1940 }
1941
1942 skip_optional_lf();
1943 return 1;
1944 }
1945
1946 static int validate_raw_date(const char *src, char *result, int maxlen)
1947 {
1948 const char *orig_src = src;
1949 char *endp;
1950 unsigned long num;
1951
1952 errno = 0;
1953
1954 num = strtoul(src, &endp, 10);
1955 /* NEEDSWORK: perhaps check for reasonable values? */
1956 if (errno || endp == src || *endp != ' ')
1957 return -1;
1958
1959 src = endp + 1;
1960 if (*src != '-' && *src != '+')
1961 return -1;
1962
1963 num = strtoul(src + 1, &endp, 10);
1964 if (errno || endp == src + 1 || *endp || (endp - orig_src) >= maxlen ||
1965 1400 < num)
1966 return -1;
1967
1968 strcpy(result, orig_src);
1969 return 0;
1970 }
1971
1972 static char *parse_ident(const char *buf)
1973 {
1974 const char *gt;
1975 size_t name_len;
1976 char *ident;
1977
1978 gt = strrchr(buf, '>');
1979 if (!gt)
1980 die("Missing > in ident string: %s", buf);
1981 gt++;
1982 if (*gt != ' ')
1983 die("Missing space after > in ident string: %s", buf);
1984 gt++;
1985 name_len = gt - buf;
1986 ident = xmalloc(name_len + 24);
1987 strncpy(ident, buf, name_len);
1988
1989 switch (whenspec) {
1990 case WHENSPEC_RAW:
1991 if (validate_raw_date(gt, ident + name_len, 24) < 0)
1992 die("Invalid raw date \"%s\" in ident: %s", gt, buf);
1993 break;
1994 case WHENSPEC_RFC2822:
1995 if (parse_date(gt, ident + name_len, 24) < 0)
1996 die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf);
1997 break;
1998 case WHENSPEC_NOW:
1999 if (strcmp("now", gt))
2000 die("Date in ident must be 'now': %s", buf);
2001 datestamp(ident + name_len, 24);
2002 break;
2003 }
2004
2005 return ident;
2006 }
2007
2008 static void parse_and_store_blob(
2009 struct last_object *last,
2010 unsigned char *sha1out,
2011 uintmax_t mark)
2012 {
2013 static struct strbuf buf = STRBUF_INIT;
2014 uintmax_t len;
2015
2016 if (parse_data(&buf, big_file_threshold, &len))
2017 store_object(OBJ_BLOB, &buf, last, sha1out, mark);
2018 else {
2019 if (last) {
2020 strbuf_release(&last->data);
2021 last->offset = 0;
2022 last->depth = 0;
2023 }
2024 stream_blob(len, sha1out, mark);
2025 skip_optional_lf();
2026 }
2027 }
2028
2029 static void parse_new_blob(void)
2030 {
2031 read_next_command();
2032 parse_mark();
2033 parse_and_store_blob(&last_blob, NULL, next_mark);
2034 }
2035
2036 static void unload_one_branch(void)
2037 {
2038 while (cur_active_branches
2039 && cur_active_branches >= max_active_branches) {
2040 uintmax_t min_commit = ULONG_MAX;
2041 struct branch *e, *l = NULL, *p = NULL;
2042
2043 for (e = active_branches; e; e = e->active_next_branch) {
2044 if (e->last_commit < min_commit) {
2045 p = l;
2046 min_commit = e->last_commit;
2047 }
2048 l = e;
2049 }
2050
2051 if (p) {
2052 e = p->active_next_branch;
2053 p->active_next_branch = e->active_next_branch;
2054 } else {
2055 e = active_branches;
2056 active_branches = e->active_next_branch;
2057 }
2058 e->active = 0;
2059 e->active_next_branch = NULL;
2060 if (e->branch_tree.tree) {
2061 release_tree_content_recursive(e->branch_tree.tree);
2062 e->branch_tree.tree = NULL;
2063 }
2064 cur_active_branches--;
2065 }
2066 }
2067
2068 static void load_branch(struct branch *b)
2069 {
2070 load_tree(&b->branch_tree);
2071 if (!b->active) {
2072 b->active = 1;
2073 b->active_next_branch = active_branches;
2074 active_branches = b;
2075 cur_active_branches++;
2076 branch_load_count++;
2077 }
2078 }
2079
2080 static unsigned char convert_num_notes_to_fanout(uintmax_t num_notes)
2081 {
2082 unsigned char fanout = 0;
2083 while ((num_notes >>= 8))
2084 fanout++;
2085 return fanout;
2086 }
2087
2088 static void construct_path_with_fanout(const char *hex_sha1,
2089 unsigned char fanout, char *path)
2090 {
2091 unsigned int i = 0, j = 0;
2092 if (fanout >= 20)
2093 die("Too large fanout (%u)", fanout);
2094 while (fanout) {
2095 path[i++] = hex_sha1[j++];
2096 path[i++] = hex_sha1[j++];
2097 path[i++] = '/';
2098 fanout--;
2099 }
2100 memcpy(path + i, hex_sha1 + j, 40 - j);
2101 path[i + 40 - j] = '\0';
2102 }
2103
2104 static uintmax_t do_change_note_fanout(
2105 struct tree_entry *orig_root, struct tree_entry *root,
2106 char *hex_sha1, unsigned int hex_sha1_len,
2107 char *fullpath, unsigned int fullpath_len,
2108 unsigned char fanout)
2109 {
2110 struct tree_content *t = root->tree;
2111 struct tree_entry *e, leaf;
2112 unsigned int i, tmp_hex_sha1_len, tmp_fullpath_len;
2113 uintmax_t num_notes = 0;
2114 unsigned char sha1[20];
2115 char realpath[60];
2116
2117 for (i = 0; t && i < t->entry_count; i++) {
2118 e = t->entries[i];
2119 tmp_hex_sha1_len = hex_sha1_len + e->name->str_len;
2120 tmp_fullpath_len = fullpath_len;
2121
2122 /*
2123 * We're interested in EITHER existing note entries (entries
2124 * with exactly 40 hex chars in path, not including directory
2125 * separators), OR directory entries that may contain note
2126 * entries (with < 40 hex chars in path).
2127 * Also, each path component in a note entry must be a multiple
2128 * of 2 chars.
2129 */
2130 if (!e->versions[1].mode ||
2131 tmp_hex_sha1_len > 40 ||
2132 e->name->str_len % 2)
2133 continue;
2134
2135 /* This _may_ be a note entry, or a subdir containing notes */
2136 memcpy(hex_sha1 + hex_sha1_len, e->name->str_dat,
2137 e->name->str_len);
2138 if (tmp_fullpath_len)
2139 fullpath[tmp_fullpath_len++] = '/';
2140 memcpy(fullpath + tmp_fullpath_len, e->name->str_dat,
2141 e->name->str_len);
2142 tmp_fullpath_len += e->name->str_len;
2143 fullpath[tmp_fullpath_len] = '\0';
2144
2145 if (tmp_hex_sha1_len == 40 && !get_sha1_hex(hex_sha1, sha1)) {
2146 /* This is a note entry */
2147 construct_path_with_fanout(hex_sha1, fanout, realpath);
2148 if (!strcmp(fullpath, realpath)) {
2149 /* Note entry is in correct location */
2150 num_notes++;
2151 continue;
2152 }
2153
2154 /* Rename fullpath to realpath */
2155 if (!tree_content_remove(orig_root, fullpath, &leaf))
2156 die("Failed to remove path %s", fullpath);
2157 tree_content_set(orig_root, realpath,
2158 leaf.versions[1].sha1,
2159 leaf.versions[1].mode,
2160 leaf.tree);
2161 } else if (S_ISDIR(e->versions[1].mode)) {
2162 /* This is a subdir that may contain note entries */
2163 if (!e->tree)
2164 load_tree(e);
2165 num_notes += do_change_note_fanout(orig_root, e,
2166 hex_sha1, tmp_hex_sha1_len,
2167 fullpath, tmp_fullpath_len, fanout);
2168 }
2169
2170 /* The above may have reallocated the current tree_content */
2171 t = root->tree;
2172 }
2173 return num_notes;
2174 }
2175
2176 static uintmax_t change_note_fanout(struct tree_entry *root,
2177 unsigned char fanout)
2178 {
2179 char hex_sha1[40], path[60];
2180 return do_change_note_fanout(root, root, hex_sha1, 0, path, 0, fanout);
2181 }
2182
2183 static void file_change_m(struct branch *b)
2184 {
2185 const char *p = command_buf.buf + 2;
2186 static struct strbuf uq = STRBUF_INIT;
2187 const char *endp;
2188 struct object_entry *oe = oe;
2189 unsigned char sha1[20];
2190 uint16_t mode, inline_data = 0;
2191
2192 p = get_mode(p, &mode);
2193 if (!p)
2194 die("Corrupt mode: %s", command_buf.buf);
2195 switch (mode) {
2196 case 0644:
2197 case 0755:
2198 mode |= S_IFREG;
2199 case S_IFREG | 0644:
2200 case S_IFREG | 0755:
2201 case S_IFLNK:
2202 case S_IFDIR:
2203 case S_IFGITLINK:
2204 /* ok */
2205 break;
2206 default:
2207 die("Corrupt mode: %s", command_buf.buf);
2208 }
2209
2210 if (*p == ':') {
2211 char *x;
2212 oe = find_mark(strtoumax(p + 1, &x, 10));
2213 hashcpy(sha1, oe->idx.sha1);
2214 p = x;
2215 } else if (!prefixcmp(p, "inline")) {
2216 inline_data = 1;
2217 p += 6;
2218 } else {
2219 if (get_sha1_hex(p, sha1))
2220 die("Invalid SHA1: %s", command_buf.buf);
2221 oe = find_object(sha1);
2222 p += 40;
2223 }
2224 if (*p++ != ' ')
2225 die("Missing space after SHA1: %s", command_buf.buf);
2226
2227 strbuf_reset(&uq);
2228 if (!unquote_c_style(&uq, p, &endp)) {
2229 if (*endp)
2230 die("Garbage after path in: %s", command_buf.buf);
2231 p = uq.buf;
2232 }
2233
2234 /* Git does not track empty, non-toplevel directories. */
2235 if (S_ISDIR(mode) && !memcmp(sha1, EMPTY_TREE_SHA1_BIN, 20) && *p) {
2236 tree_content_remove(&b->branch_tree, p, NULL);
2237 return;
2238 }
2239
2240 if (S_ISGITLINK(mode)) {
2241 if (inline_data)
2242 die("Git links cannot be specified 'inline': %s",
2243 command_buf.buf);
2244 else if (oe) {
2245 if (oe->type != OBJ_COMMIT)
2246 die("Not a commit (actually a %s): %s",
2247 typename(oe->type), command_buf.buf);
2248 }
2249 /*
2250 * Accept the sha1 without checking; it expected to be in
2251 * another repository.
2252 */
2253 } else if (inline_data) {
2254 if (S_ISDIR(mode))
2255 die("Directories cannot be specified 'inline': %s",
2256 command_buf.buf);
2257 if (p != uq.buf) {
2258 strbuf_addstr(&uq, p);
2259 p = uq.buf;
2260 }
2261 read_next_command();
2262 parse_and_store_blob(&last_blob, sha1, 0);
2263 } else {
2264 enum object_type expected = S_ISDIR(mode) ?
2265 OBJ_TREE: OBJ_BLOB;
2266 enum object_type type = oe ? oe->type :
2267 sha1_object_info(sha1, NULL);
2268 if (type < 0)
2269 die("%s not found: %s",
2270 S_ISDIR(mode) ? "Tree" : "Blob",
2271 command_buf.buf);
2272 if (type != expected)
2273 die("Not a %s (actually a %s): %s",
2274 typename(expected), typename(type),
2275 command_buf.buf);
2276 }
2277
2278 if (!*p) {
2279 tree_content_replace(&b->branch_tree, sha1, mode, NULL);
2280 return;
2281 }
2282 tree_content_set(&b->branch_tree, p, sha1, mode, NULL);
2283 }
2284
2285 static void file_change_d(struct branch *b)
2286 {
2287 const char *p = command_buf.buf + 2;
2288 static struct strbuf uq = STRBUF_INIT;
2289 const char *endp;
2290
2291 strbuf_reset(&uq);
2292 if (!unquote_c_style(&uq, p, &endp)) {
2293 if (*endp)
2294 die("Garbage after path in: %s", command_buf.buf);
2295 p = uq.buf;
2296 }
2297 tree_content_remove(&b->branch_tree, p, NULL);
2298 }
2299
2300 static void file_change_cr(struct branch *b, int rename)
2301 {
2302 const char *s, *d;
2303 static struct strbuf s_uq = STRBUF_INIT;
2304 static struct strbuf d_uq = STRBUF_INIT;
2305 const char *endp;
2306 struct tree_entry leaf;
2307
2308 s = command_buf.buf + 2;
2309 strbuf_reset(&s_uq);
2310 if (!unquote_c_style(&s_uq, s, &endp)) {
2311 if (*endp != ' ')
2312 die("Missing space after source: %s", command_buf.buf);
2313 } else {
2314 endp = strchr(s, ' ');
2315 if (!endp)
2316 die("Missing space after source: %s", command_buf.buf);
2317 strbuf_add(&s_uq, s, endp - s);
2318 }
2319 s = s_uq.buf;
2320
2321 endp++;
2322 if (!*endp)
2323 die("Missing dest: %s", command_buf.buf);
2324
2325 d = endp;
2326 strbuf_reset(&d_uq);
2327 if (!unquote_c_style(&d_uq, d, &endp)) {
2328 if (*endp)
2329 die("Garbage after dest in: %s", command_buf.buf);
2330 d = d_uq.buf;
2331 }
2332
2333 memset(&leaf, 0, sizeof(leaf));
2334 if (rename)
2335 tree_content_remove(&b->branch_tree, s, &leaf);
2336 else
2337 tree_content_get(&b->branch_tree, s, &leaf);
2338 if (!leaf.versions[1].mode)
2339 die("Path %s not in branch", s);
2340 if (!*d) { /* C "path/to/subdir" "" */
2341 tree_content_replace(&b->branch_tree,
2342 leaf.versions[1].sha1,
2343 leaf.versions[1].mode,
2344 leaf.tree);
2345 return;
2346 }
2347 tree_content_set(&b->branch_tree, d,
2348 leaf.versions[1].sha1,
2349 leaf.versions[1].mode,
2350 leaf.tree);
2351 }
2352
2353 static void note_change_n(struct branch *b, unsigned char old_fanout)
2354 {
2355 const char *p = command_buf.buf + 2;
2356 static struct strbuf uq = STRBUF_INIT;
2357 struct object_entry *oe = oe;
2358 struct branch *s;
2359 unsigned char sha1[20], commit_sha1[20];
2360 char path[60];
2361 uint16_t inline_data = 0;
2362 unsigned char new_fanout;
2363
2364 /* <dataref> or 'inline' */
2365 if (*p == ':') {
2366 char *x;
2367 oe = find_mark(strtoumax(p + 1, &x, 10));
2368 hashcpy(sha1, oe->idx.sha1);
2369 p = x;
2370 } else if (!prefixcmp(p, "inline")) {
2371 inline_data = 1;
2372 p += 6;
2373 } else {
2374 if (get_sha1_hex(p, sha1))
2375 die("Invalid SHA1: %s", command_buf.buf);
2376 oe = find_object(sha1);
2377 p += 40;
2378 }
2379 if (*p++ != ' ')
2380 die("Missing space after SHA1: %s", command_buf.buf);
2381
2382 /* <committish> */
2383 s = lookup_branch(p);
2384 if (s) {
2385 hashcpy(commit_sha1, s->sha1);
2386 } else if (*p == ':') {
2387 uintmax_t commit_mark = strtoumax(p + 1, NULL, 10);
2388 struct object_entry *commit_oe = find_mark(commit_mark);
2389 if (commit_oe->type != OBJ_COMMIT)
2390 die("Mark :%" PRIuMAX " not a commit", commit_mark);
2391 hashcpy(commit_sha1, commit_oe->idx.sha1);
2392 } else if (!get_sha1(p, commit_sha1)) {
2393 unsigned long size;
2394 char *buf = read_object_with_reference(commit_sha1,
2395 commit_type, &size, commit_sha1);
2396 if (!buf || size < 46)
2397 die("Not a valid commit: %s", p);
2398 free(buf);
2399 } else
2400 die("Invalid ref name or SHA1 expression: %s", p);
2401
2402 if (inline_data) {
2403 if (p != uq.buf) {
2404 strbuf_addstr(&uq, p);
2405 p = uq.buf;
2406 }
2407 read_next_command();
2408 parse_and_store_blob(&last_blob, sha1, 0);
2409 } else if (oe) {
2410 if (oe->type != OBJ_BLOB)
2411 die("Not a blob (actually a %s): %s",
2412 typename(oe->type), command_buf.buf);
2413 } else if (!is_null_sha1(sha1)) {
2414 enum object_type type = sha1_object_info(sha1, NULL);
2415 if (type < 0)
2416 die("Blob not found: %s", command_buf.buf);
2417 if (type != OBJ_BLOB)
2418 die("Not a blob (actually a %s): %s",
2419 typename(type), command_buf.buf);
2420 }
2421
2422 construct_path_with_fanout(sha1_to_hex(commit_sha1), old_fanout, path);
2423 if (tree_content_remove(&b->branch_tree, path, NULL))
2424 b->num_notes--;
2425
2426 if (is_null_sha1(sha1))
2427 return; /* nothing to insert */
2428
2429 b->num_notes++;
2430 new_fanout = convert_num_notes_to_fanout(b->num_notes);
2431 construct_path_with_fanout(sha1_to_hex(commit_sha1), new_fanout, path);
2432 tree_content_set(&b->branch_tree, path, sha1, S_IFREG | 0644, NULL);
2433 }
2434
2435 static void file_change_deleteall(struct branch *b)
2436 {
2437 release_tree_content_recursive(b->branch_tree.tree);
2438 hashclr(b->branch_tree.versions[0].sha1);
2439 hashclr(b->branch_tree.versions[1].sha1);
2440 load_tree(&b->branch_tree);
2441 b->num_notes = 0;
2442 }
2443
2444 static void parse_from_commit(struct branch *b, char *buf, unsigned long size)
2445 {
2446 if (!buf || size < 46)
2447 die("Not a valid commit: %s", sha1_to_hex(b->sha1));
2448 if (memcmp("tree ", buf, 5)
2449 || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
2450 die("The commit %s is corrupt", sha1_to_hex(b->sha1));
2451 hashcpy(b->branch_tree.versions[0].sha1,
2452 b->branch_tree.versions[1].sha1);
2453 }
2454
2455 static void parse_from_existing(struct branch *b)
2456 {
2457 if (is_null_sha1(b->sha1)) {
2458 hashclr(b->branch_tree.versions[0].sha1);
2459 hashclr(b->branch_tree.versions[1].sha1);
2460 } else {
2461 unsigned long size;
2462 char *buf;
2463
2464 buf = read_object_with_reference(b->sha1,
2465 commit_type, &size, b->sha1);
2466 parse_from_commit(b, buf, size);
2467 free(buf);
2468 }
2469 }
2470
2471 static int parse_from(struct branch *b)
2472 {
2473 const char *from;
2474 struct branch *s;
2475
2476 if (prefixcmp(command_buf.buf, "from "))
2477 return 0;
2478
2479 if (b->branch_tree.tree) {
2480 release_tree_content_recursive(b->branch_tree.tree);
2481 b->branch_tree.tree = NULL;
2482 }
2483
2484 from = strchr(command_buf.buf, ' ') + 1;
2485 s = lookup_branch(from);
2486 if (b == s)
2487 die("Can't create a branch from itself: %s", b->name);
2488 else if (s) {
2489 unsigned char *t = s->branch_tree.versions[1].sha1;
2490 hashcpy(b->sha1, s->sha1);
2491 hashcpy(b->branch_tree.versions[0].sha1, t);
2492 hashcpy(b->branch_tree.versions[1].sha1, t);
2493 } else if (*from == ':') {
2494 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
2495 struct object_entry *oe = find_mark(idnum);
2496 if (oe->type != OBJ_COMMIT)
2497 die("Mark :%" PRIuMAX " not a commit", idnum);
2498 hashcpy(b->sha1, oe->idx.sha1);
2499 if (oe->pack_id != MAX_PACK_ID) {
2500 unsigned long size;
2501 char *buf = gfi_unpack_entry(oe, &size);
2502 parse_from_commit(b, buf, size);
2503 free(buf);
2504 } else
2505 parse_from_existing(b);
2506 } else if (!get_sha1(from, b->sha1))
2507 parse_from_existing(b);
2508 else
2509 die("Invalid ref name or SHA1 expression: %s", from);
2510
2511 read_next_command();
2512 return 1;
2513 }
2514
2515 static struct hash_list *parse_merge(unsigned int *count)
2516 {
2517 struct hash_list *list = NULL, *n, *e = e;
2518 const char *from;
2519 struct branch *s;
2520
2521 *count = 0;
2522 while (!prefixcmp(command_buf.buf, "merge ")) {
2523 from = strchr(command_buf.buf, ' ') + 1;
2524 n = xmalloc(sizeof(*n));
2525 s = lookup_branch(from);
2526 if (s)
2527 hashcpy(n->sha1, s->sha1);
2528 else if (*from == ':') {
2529 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
2530 struct object_entry *oe = find_mark(idnum);
2531 if (oe->type != OBJ_COMMIT)
2532 die("Mark :%" PRIuMAX " not a commit", idnum);
2533 hashcpy(n->sha1, oe->idx.sha1);
2534 } else if (!get_sha1(from, n->sha1)) {
2535 unsigned long size;
2536 char *buf = read_object_with_reference(n->sha1,
2537 commit_type, &size, n->sha1);
2538 if (!buf || size < 46)
2539 die("Not a valid commit: %s", from);
2540 free(buf);
2541 } else
2542 die("Invalid ref name or SHA1 expression: %s", from);
2543
2544 n->next = NULL;
2545 if (list)
2546 e->next = n;
2547 else
2548 list = n;
2549 e = n;
2550 (*count)++;
2551 read_next_command();
2552 }
2553 return list;
2554 }
2555
2556 static void parse_new_commit(void)
2557 {
2558 static struct strbuf msg = STRBUF_INIT;
2559 struct branch *b;
2560 char *sp;
2561 char *author = NULL;
2562 char *committer = NULL;
2563 struct hash_list *merge_list = NULL;
2564 unsigned int merge_count;
2565 unsigned char prev_fanout, new_fanout;
2566
2567 /* Obtain the branch name from the rest of our command */
2568 sp = strchr(command_buf.buf, ' ') + 1;
2569 b = lookup_branch(sp);
2570 if (!b)
2571 b = new_branch(sp);
2572
2573 read_next_command();
2574 parse_mark();
2575 if (!prefixcmp(command_buf.buf, "author ")) {
2576 author = parse_ident(command_buf.buf + 7);
2577 read_next_command();
2578 }
2579 if (!prefixcmp(command_buf.buf, "committer ")) {
2580 committer = parse_ident(command_buf.buf + 10);
2581 read_next_command();
2582 }
2583 if (!committer)
2584 die("Expected committer but didn't get one");
2585 parse_data(&msg, 0, NULL);
2586 read_next_command();
2587 parse_from(b);
2588 merge_list = parse_merge(&merge_count);
2589
2590 /* ensure the branch is active/loaded */
2591 if (!b->branch_tree.tree || !max_active_branches) {
2592 unload_one_branch();
2593 load_branch(b);
2594 }
2595
2596 prev_fanout = convert_num_notes_to_fanout(b->num_notes);
2597
2598 /* file_change* */
2599 while (command_buf.len > 0) {
2600 if (!prefixcmp(command_buf.buf, "M "))
2601 file_change_m(b);
2602 else if (!prefixcmp(command_buf.buf, "D "))
2603 file_change_d(b);
2604 else if (!prefixcmp(command_buf.buf, "R "))
2605 file_change_cr(b, 1);
2606 else if (!prefixcmp(command_buf.buf, "C "))
2607 file_change_cr(b, 0);
2608 else if (!prefixcmp(command_buf.buf, "N "))
2609 note_change_n(b, prev_fanout);
2610 else if (!strcmp("deleteall", command_buf.buf))
2611 file_change_deleteall(b);
2612 else {
2613 unread_command_buf = 1;
2614 break;
2615 }
2616 if (read_next_command() == EOF)
2617 break;
2618 }
2619
2620 new_fanout = convert_num_notes_to_fanout(b->num_notes);
2621 if (new_fanout != prev_fanout)
2622 b->num_notes = change_note_fanout(&b->branch_tree, new_fanout);
2623
2624 /* build the tree and the commit */
2625 store_tree(&b->branch_tree);
2626 hashcpy(b->branch_tree.versions[0].sha1,
2627 b->branch_tree.versions[1].sha1);
2628
2629 strbuf_reset(&new_data);
2630 strbuf_addf(&new_data, "tree %s\n",
2631 sha1_to_hex(b->branch_tree.versions[1].sha1));
2632 if (!is_null_sha1(b->sha1))
2633 strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(b->sha1));
2634 while (merge_list) {
2635 struct hash_list *next = merge_list->next;
2636 strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(merge_list->sha1));
2637 free(merge_list);
2638 merge_list = next;
2639 }
2640 strbuf_addf(&new_data,
2641 "author %s\n"
2642 "committer %s\n"
2643 "\n",
2644 author ? author : committer, committer);
2645 strbuf_addbuf(&new_data, &msg);
2646 free(author);
2647 free(committer);
2648
2649 if (!store_object(OBJ_COMMIT, &new_data, NULL, b->sha1, next_mark))
2650 b->pack_id = pack_id;
2651 b->last_commit = object_count_by_type[OBJ_COMMIT];
2652 }
2653
2654 static void parse_new_tag(void)
2655 {
2656 static struct strbuf msg = STRBUF_INIT;
2657 char *sp;
2658 const char *from;
2659 char *tagger;
2660 struct branch *s;
2661 struct tag *t;
2662 uintmax_t from_mark = 0;
2663 unsigned char sha1[20];
2664 enum object_type type;
2665
2666 /* Obtain the new tag name from the rest of our command */
2667 sp = strchr(command_buf.buf, ' ') + 1;
2668 t = pool_alloc(sizeof(struct tag));
2669 t->next_tag = NULL;
2670 t->name = pool_strdup(sp);
2671 if (last_tag)
2672 last_tag->next_tag = t;
2673 else
2674 first_tag = t;
2675 last_tag = t;
2676 read_next_command();
2677
2678 /* from ... */
2679 if (prefixcmp(command_buf.buf, "from "))
2680 die("Expected from command, got %s", command_buf.buf);
2681 from = strchr(command_buf.buf, ' ') + 1;
2682 s = lookup_branch(from);
2683 if (s) {
2684 hashcpy(sha1, s->sha1);
2685 type = OBJ_COMMIT;
2686 } else if (*from == ':') {
2687 struct object_entry *oe;
2688 from_mark = strtoumax(from + 1, NULL, 10);
2689 oe = find_mark(from_mark);
2690 type = oe->type;
2691 hashcpy(sha1, oe->idx.sha1);
2692 } else if (!get_sha1(from, sha1)) {
2693 unsigned long size;
2694 char *buf;
2695
2696 buf = read_sha1_file(sha1, &type, &size);
2697 if (!buf || size < 46)
2698 die("Not a valid commit: %s", from);
2699 free(buf);
2700 } else
2701 die("Invalid ref name or SHA1 expression: %s", from);
2702 read_next_command();
2703
2704 /* tagger ... */
2705 if (!prefixcmp(command_buf.buf, "tagger ")) {
2706 tagger = parse_ident(command_buf.buf + 7);
2707 read_next_command();
2708 } else
2709 tagger = NULL;
2710
2711 /* tag payload/message */
2712 parse_data(&msg, 0, NULL);
2713
2714 /* build the tag object */
2715 strbuf_reset(&new_data);
2716
2717 strbuf_addf(&new_data,
2718 "object %s\n"
2719 "type %s\n"
2720 "tag %s\n",
2721 sha1_to_hex(sha1), typename(type), t->name);
2722 if (tagger)
2723 strbuf_addf(&new_data,
2724 "tagger %s\n", tagger);
2725 strbuf_addch(&new_data, '\n');
2726 strbuf_addbuf(&new_data, &msg);
2727 free(tagger);
2728
2729 if (store_object(OBJ_TAG, &new_data, NULL, t->sha1, 0))
2730 t->pack_id = MAX_PACK_ID;
2731 else
2732 t->pack_id = pack_id;
2733 }
2734
2735 static void parse_reset_branch(void)
2736 {
2737 struct branch *b;
2738 char *sp;
2739
2740 /* Obtain the branch name from the rest of our command */
2741 sp = strchr(command_buf.buf, ' ') + 1;
2742 b = lookup_branch(sp);
2743 if (b) {
2744 hashclr(b->sha1);
2745 hashclr(b->branch_tree.versions[0].sha1);
2746 hashclr(b->branch_tree.versions[1].sha1);
2747 if (b->branch_tree.tree) {
2748 release_tree_content_recursive(b->branch_tree.tree);
2749 b->branch_tree.tree = NULL;
2750 }
2751 }
2752 else
2753 b = new_branch(sp);
2754 read_next_command();
2755 parse_from(b);
2756 if (command_buf.len > 0)
2757 unread_command_buf = 1;
2758 }
2759
2760 static void cat_blob_write(const char *buf, unsigned long size)
2761 {
2762 if (write_in_full(cat_blob_fd, buf, size) != size)
2763 die_errno("Write to frontend failed");
2764 }
2765
2766 static void cat_blob(struct object_entry *oe, unsigned char sha1[20])
2767 {
2768 struct strbuf line = STRBUF_INIT;
2769 unsigned long size;
2770 enum object_type type = 0;
2771 char *buf;
2772
2773 if (!oe || oe->pack_id == MAX_PACK_ID) {
2774 buf = read_sha1_file(sha1, &type, &size);
2775 } else {
2776 type = oe->type;
2777 buf = gfi_unpack_entry(oe, &size);
2778 }
2779
2780 /*
2781 * Output based on batch_one_object() from cat-file.c.
2782 */
2783 if (type <= 0) {
2784 strbuf_reset(&line);
2785 strbuf_addf(&line, "%s missing\n", sha1_to_hex(sha1));
2786 cat_blob_write(line.buf, line.len);
2787 strbuf_release(&line);
2788 free(buf);
2789 return;
2790 }
2791 if (!buf)
2792 die("Can't read object %s", sha1_to_hex(sha1));
2793 if (type != OBJ_BLOB)
2794 die("Object %s is a %s but a blob was expected.",
2795 sha1_to_hex(sha1), typename(type));
2796 strbuf_reset(&line);
2797 strbuf_addf(&line, "%s %s %lu\n", sha1_to_hex(sha1),
2798 typename(type), size);
2799 cat_blob_write(line.buf, line.len);
2800 strbuf_release(&line);
2801 cat_blob_write(buf, size);
2802 cat_blob_write("\n", 1);
2803 free(buf);
2804 }
2805
2806 static void parse_cat_blob(void)
2807 {
2808 const char *p;
2809 struct object_entry *oe = oe;
2810 unsigned char sha1[20];
2811
2812 /* cat-blob SP <object> LF */
2813 p = command_buf.buf + strlen("cat-blob ");
2814 if (*p == ':') {
2815 char *x;
2816 oe = find_mark(strtoumax(p + 1, &x, 10));
2817 if (x == p + 1)
2818 die("Invalid mark: %s", command_buf.buf);
2819 if (!oe)
2820 die("Unknown mark: %s", command_buf.buf);
2821 if (*x)
2822 die("Garbage after mark: %s", command_buf.buf);
2823 hashcpy(sha1, oe->idx.sha1);
2824 } else {
2825 if (get_sha1_hex(p, sha1))
2826 die("Invalid SHA1: %s", command_buf.buf);
2827 if (p[40])
2828 die("Garbage after SHA1: %s", command_buf.buf);
2829 oe = find_object(sha1);
2830 }
2831
2832 cat_blob(oe, sha1);
2833 }
2834
2835 static void checkpoint(void)
2836 {
2837 checkpoint_requested = 0;
2838 if (object_count) {
2839 cycle_packfile();
2840 dump_branches();
2841 dump_tags();
2842 dump_marks();
2843 }
2844 }
2845
2846 static void parse_checkpoint(void)
2847 {
2848 checkpoint_requested = 1;
2849 skip_optional_lf();
2850 }
2851
2852 static void parse_progress(void)
2853 {
2854 fwrite(command_buf.buf, 1, command_buf.len, stdout);
2855 fputc('\n', stdout);
2856 fflush(stdout);
2857 skip_optional_lf();
2858 }
2859
2860 static char* make_fast_import_path(const char *path)
2861 {
2862 struct strbuf abs_path = STRBUF_INIT;
2863
2864 if (!relative_marks_paths || is_absolute_path(path))
2865 return xstrdup(path);
2866 strbuf_addf(&abs_path, "%s/info/fast-import/%s", get_git_dir(), path);
2867 return strbuf_detach(&abs_path, NULL);
2868 }
2869
2870 static void option_import_marks(const char *marks, int from_stream)
2871 {
2872 if (import_marks_file) {
2873 if (from_stream)
2874 die("Only one import-marks command allowed per stream");
2875
2876 /* read previous mark file */
2877 if(!import_marks_file_from_stream)
2878 read_marks();
2879 }
2880
2881 import_marks_file = make_fast_import_path(marks);
2882 safe_create_leading_directories_const(import_marks_file);
2883 import_marks_file_from_stream = from_stream;
2884 }
2885
2886 static void option_date_format(const char *fmt)
2887 {
2888 if (!strcmp(fmt, "raw"))
2889 whenspec = WHENSPEC_RAW;
2890 else if (!strcmp(fmt, "rfc2822"))
2891 whenspec = WHENSPEC_RFC2822;
2892 else if (!strcmp(fmt, "now"))
2893 whenspec = WHENSPEC_NOW;
2894 else
2895 die("unknown --date-format argument %s", fmt);
2896 }
2897
2898 static unsigned long ulong_arg(const char *option, const char *arg)
2899 {
2900 char *endptr;
2901 unsigned long rv = strtoul(arg, &endptr, 0);
2902 if (strchr(arg, '-') || endptr == arg || *endptr)
2903 die("%s: argument must be a non-negative integer", option);
2904 return rv;
2905 }
2906
2907 static void option_depth(const char *depth)
2908 {
2909 max_depth = ulong_arg("--depth", depth);
2910 if (max_depth > MAX_DEPTH)
2911 die("--depth cannot exceed %u", MAX_DEPTH);
2912 }
2913
2914 static void option_active_branches(const char *branches)
2915 {
2916 max_active_branches = ulong_arg("--active-branches", branches);
2917 }
2918
2919 static void option_export_marks(const char *marks)
2920 {
2921 export_marks_file = make_fast_import_path(marks);
2922 safe_create_leading_directories_const(export_marks_file);
2923 }
2924
2925 static void option_cat_blob_fd(const char *fd)
2926 {
2927 unsigned long n = ulong_arg("--cat-blob-fd", fd);
2928 if (n > (unsigned long) INT_MAX)
2929 die("--cat-blob-fd cannot exceed %d", INT_MAX);
2930 cat_blob_fd = (int) n;
2931 }
2932
2933 static void option_export_pack_edges(const char *edges)
2934 {
2935 if (pack_edges)
2936 fclose(pack_edges);
2937 pack_edges = fopen(edges, "a");
2938 if (!pack_edges)
2939 die_errno("Cannot open '%s'", edges);
2940 }
2941
2942 static int parse_one_option(const char *option)
2943 {
2944 if (!prefixcmp(option, "max-pack-size=")) {
2945 unsigned long v;
2946 if (!git_parse_ulong(option + 14, &v))
2947 return 0;
2948 if (v < 8192) {
2949 warning("max-pack-size is now in bytes, assuming --max-pack-size=%lum", v);
2950 v *= 1024 * 1024;
2951 } else if (v < 1024 * 1024) {
2952 warning("minimum max-pack-size is 1 MiB");
2953 v = 1024 * 1024;
2954 }
2955 max_packsize = v;
2956 } else if (!prefixcmp(option, "big-file-threshold=")) {
2957 unsigned long v;
2958 if (!git_parse_ulong(option + 19, &v))
2959 return 0;
2960 big_file_threshold = v;
2961 } else if (!prefixcmp(option, "depth=")) {
2962 option_depth(option + 6);
2963 } else if (!prefixcmp(option, "active-branches=")) {
2964 option_active_branches(option + 16);
2965 } else if (!prefixcmp(option, "export-pack-edges=")) {
2966 option_export_pack_edges(option + 18);
2967 } else if (!prefixcmp(option, "quiet")) {
2968 show_stats = 0;
2969 } else if (!prefixcmp(option, "stats")) {
2970 show_stats = 1;
2971 } else {
2972 return 0;
2973 }
2974
2975 return 1;
2976 }
2977
2978 static int parse_one_feature(const char *feature, int from_stream)
2979 {
2980 if (!prefixcmp(feature, "date-format=")) {
2981 option_date_format(feature + 12);
2982 } else if (!prefixcmp(feature, "import-marks=")) {
2983 option_import_marks(feature + 13, from_stream);
2984 } else if (!prefixcmp(feature, "export-marks=")) {
2985 option_export_marks(feature + 13);
2986 } else if (!strcmp(feature, "cat-blob")) {
2987 ; /* Don't die - this feature is supported */
2988 } else if (!prefixcmp(feature, "relative-marks")) {
2989 relative_marks_paths = 1;
2990 } else if (!prefixcmp(feature, "no-relative-marks")) {
2991 relative_marks_paths = 0;
2992 } else if (!prefixcmp(feature, "force")) {
2993 force_update = 1;
2994 } else if (!strcmp(feature, "notes")) {
2995 ; /* do nothing; we have the feature */
2996 } else {
2997 return 0;
2998 }
2999
3000 return 1;
3001 }
3002
3003 static void parse_feature(void)
3004 {
3005 char *feature = command_buf.buf + 8;
3006
3007 if (seen_data_command)
3008 die("Got feature command '%s' after data command", feature);
3009
3010 if (parse_one_feature(feature, 1))
3011 return;
3012
3013 die("This version of fast-import does not support feature %s.", feature);
3014 }
3015
3016 static void parse_option(void)
3017 {
3018 char *option = command_buf.buf + 11;
3019
3020 if (seen_data_command)
3021 die("Got option command '%s' after data command", option);
3022
3023 if (parse_one_option(option))
3024 return;
3025
3026 die("This version of fast-import does not support option: %s", option);
3027 }
3028
3029 static int git_pack_config(const char *k, const char *v, void *cb)
3030 {
3031 if (!strcmp(k, "pack.depth")) {
3032 max_depth = git_config_int(k, v);
3033 if (max_depth > MAX_DEPTH)
3034 max_depth = MAX_DEPTH;
3035 return 0;
3036 }
3037 if (!strcmp(k, "pack.compression")) {
3038 int level = git_config_int(k, v);
3039 if (level == -1)
3040 level = Z_DEFAULT_COMPRESSION;
3041 else if (level < 0 || level > Z_BEST_COMPRESSION)
3042 die("bad pack compression level %d", level);
3043 pack_compression_level = level;
3044 pack_compression_seen = 1;
3045 return 0;
3046 }
3047 if (!strcmp(k, "pack.indexversion")) {
3048 pack_idx_default_version = git_config_int(k, v);
3049 if (pack_idx_default_version > 2)
3050 die("bad pack.indexversion=%"PRIu32,
3051 pack_idx_default_version);
3052 return 0;
3053 }
3054 if (!strcmp(k, "pack.packsizelimit")) {
3055 max_packsize = git_config_ulong(k, v);
3056 return 0;
3057 }
3058 if (!strcmp(k, "core.bigfilethreshold")) {
3059 long n = git_config_int(k, v);
3060 big_file_threshold = 0 < n ? n : 0;
3061 }
3062 return git_default_config(k, v, cb);
3063 }
3064
3065 static const char fast_import_usage[] =
3066 "git fast-import [--date-format=<f>] [--max-pack-size=<n>] [--big-file-threshold=<n>] [--depth=<n>] [--active-branches=<n>] [--export-marks=<marks.file>]";
3067
3068 static void parse_argv(void)
3069 {
3070 unsigned int i;
3071
3072 for (i = 1; i < global_argc; i++) {
3073 const char *a = global_argv[i];
3074
3075 if (*a != '-' || !strcmp(a, "--"))
3076 break;
3077
3078 if (parse_one_option(a + 2))
3079 continue;
3080
3081 if (parse_one_feature(a + 2, 0))
3082 continue;
3083
3084 if (!prefixcmp(a + 2, "cat-blob-fd=")) {
3085 option_cat_blob_fd(a + 2 + strlen("cat-blob-fd="));
3086 continue;
3087 }
3088
3089 die("unknown option %s", a);
3090 }
3091 if (i != global_argc)
3092 usage(fast_import_usage);
3093
3094 seen_data_command = 1;
3095 if (import_marks_file)
3096 read_marks();
3097 }
3098
3099 int main(int argc, const char **argv)
3100 {
3101 unsigned int i;
3102
3103 git_extract_argv0_path(argv[0]);
3104
3105 if (argc == 2 && !strcmp(argv[1], "-h"))
3106 usage(fast_import_usage);
3107
3108 setup_git_directory();
3109 git_config(git_pack_config, NULL);
3110 if (!pack_compression_seen && core_compression_seen)
3111 pack_compression_level = core_compression_level;
3112
3113 alloc_objects(object_entry_alloc);
3114 strbuf_init(&command_buf, 0);
3115 atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
3116 branch_table = xcalloc(branch_table_sz, sizeof(struct branch*));
3117 avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*));
3118 marks = pool_calloc(1, sizeof(struct mark_set));
3119
3120 global_argc = argc;
3121 global_argv = argv;
3122
3123 rc_free = pool_alloc(cmd_save * sizeof(*rc_free));
3124 for (i = 0; i < (cmd_save - 1); i++)
3125 rc_free[i].next = &rc_free[i + 1];
3126 rc_free[cmd_save - 1].next = NULL;
3127
3128 prepare_packed_git();
3129 start_packfile();
3130 set_die_routine(die_nicely);
3131 set_checkpoint_signal();
3132 while (read_next_command() != EOF) {
3133 if (!strcmp("blob", command_buf.buf))
3134 parse_new_blob();
3135 else if (!prefixcmp(command_buf.buf, "commit "))
3136 parse_new_commit();
3137 else if (!prefixcmp(command_buf.buf, "tag "))
3138 parse_new_tag();
3139 else if (!prefixcmp(command_buf.buf, "reset "))
3140 parse_reset_branch();
3141 else if (!strcmp("checkpoint", command_buf.buf))
3142 parse_checkpoint();
3143 else if (!prefixcmp(command_buf.buf, "progress "))
3144 parse_progress();
3145 else if (!prefixcmp(command_buf.buf, "feature "))
3146 parse_feature();
3147 else if (!prefixcmp(command_buf.buf, "option git "))
3148 parse_option();
3149 else if (!prefixcmp(command_buf.buf, "option "))
3150 /* ignore non-git options*/;
3151 else
3152 die("Unsupported command: %s", command_buf.buf);
3153
3154 if (checkpoint_requested)
3155 checkpoint();
3156 }
3157
3158 /* argv hasn't been parsed yet, do so */
3159 if (!seen_data_command)
3160 parse_argv();
3161
3162 end_packfile();
3163
3164 dump_branches();
3165 dump_tags();
3166 unkeep_all_packs();
3167 dump_marks();
3168
3169 if (pack_edges)
3170 fclose(pack_edges);
3171
3172 if (show_stats) {
3173 uintmax_t total_count = 0, duplicate_count = 0;
3174 for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++)
3175 total_count += object_count_by_type[i];
3176 for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++)
3177 duplicate_count += duplicate_count_by_type[i];
3178
3179 fprintf(stderr, "%s statistics:\n", argv[0]);
3180 fprintf(stderr, "---------------------------------------------------------------------\n");
3181 fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
3182 fprintf(stderr, "Total objects: %10" PRIuMAX " (%10" PRIuMAX " duplicates )\n", total_count, duplicate_count);
3183 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]);
3184 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]);
3185 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]);
3186 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]);
3187 fprintf(stderr, "Total branches: %10lu (%10lu loads )\n", branch_count, branch_load_count);
3188 fprintf(stderr, " marks: %10" PRIuMAX " (%10" PRIuMAX " unique )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
3189 fprintf(stderr, " atoms: %10u\n", atom_cnt);
3190 fprintf(stderr, "Memory total: %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024);
3191 fprintf(stderr, " pools: %10lu KiB\n", (unsigned long)(total_allocd/1024));
3192 fprintf(stderr, " objects: %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
3193 fprintf(stderr, "---------------------------------------------------------------------\n");
3194 pack_report();
3195 fprintf(stderr, "---------------------------------------------------------------------\n");
3196 fprintf(stderr, "\n");
3197 }
3198
3199 return failure ? 1 : 0;
3200 }