fast-import.c

   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         ;
  12
  13   new_blob ::= 'blob' lf
  14         mark?
  15     file_content;
  16   file_content ::= data;
  17
  18   new_commit ::= 'commit' sp ref_str lf
  19     mark?
  20     ('author' sp name '<' email '>' when lf)?
  21     'committer' sp name '<' email '>' when lf
  22     commit_msg
  23     ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)?
  24     ('merge' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)*
  25     file_change*
  26     lf;
  27   commit_msg ::= data;
  28
  29   file_change ::= file_clr | file_del | file_obm | file_inm;
  30   file_clr ::= 'deleteall' lf;
  31   file_del ::= 'D' sp path_str lf;
  32   file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf;
  33   file_inm ::= 'M' sp mode sp 'inline' sp path_str lf
  34     data;
  35
  36   new_tag ::= 'tag' sp tag_str lf
  37     'from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf
  38         'tagger' sp name '<' email '>' when lf
  39     tag_msg;
  40   tag_msg ::= data;
  41
  42   reset_branch ::= 'reset' sp ref_str lf
  43     ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)?
  44     lf;
  45
  46   checkpoint ::= 'checkpoint' lf
  47     lf;
  48
  49      # note: the first idnum in a stream should be 1 and subsequent
  50      # idnums should not have gaps between values as this will cause
  51      # the stream parser to reserve space for the gapped values.  An
  52          # idnum can be updated in the future to a new object by issuing
  53      # a new mark directive with the old idnum.
  54          #
  55   mark ::= 'mark' sp idnum lf;
  56   data ::= (delimited_data | exact_data)
  57     lf;
  58
  59     # note: delim may be any string but must not contain lf.
  60     # data_line may contain any data but must not be exactly
  61     # delim.
  62   delimited_data ::= 'data' sp '<<' delim lf
  63     (data_line lf)*
  64         delim lf;
  65
  66      # note: declen indicates the length of binary_data in bytes.
  67      # declen does not include the lf preceeding the binary data.
  68      #
  69   exact_data ::= 'data' sp declen lf
  70     binary_data;
  71
  72      # note: quoted strings are C-style quoting supporting \c for
  73      # common escapes of 'c' (e..g \n, \t, \\, \") or \nnn where nnn
  74          # is the signed byte value in octal.  Note that the only
  75      # characters which must actually be escaped to protect the
  76      # stream formatting is: \, " and LF.  Otherwise these values
  77          # are UTF8.
  78      #
  79   ref_str     ::= ref;
  80   sha1exp_str ::= sha1exp;
  81   tag_str     ::= tag;
  82   path_str    ::= path    | '"' quoted(path)    '"' ;
  83   mode        ::= '100644' | '644'
  84                 | '100755' | '755'
  85                 | '120000'
  86                 ;
  87
  88   declen ::= # unsigned 32 bit value, ascii base10 notation;
  89   bigint ::= # unsigned integer value, ascii base10 notation;
  90   binary_data ::= # file content, not interpreted;
  91
  92   when         ::= raw_when | rfc2822_when;
  93   raw_when     ::= ts sp tz;
  94   rfc2822_when ::= # Valid RFC 2822 date and time;
  95
  96   sp ::= # ASCII space character;
  97   lf ::= # ASCII newline (LF) character;
  98
  99      # note: a colon (':') must precede the numerical value assigned to
 100          # an idnum.  This is to distinguish it from a ref or tag name as
 101      # GIT does not permit ':' in ref or tag strings.
 102          #
 103   idnum   ::= ':' bigint;
 104   path    ::= # GIT style file path, e.g. "a/b/c";
 105   ref     ::= # GIT ref name, e.g. "refs/heads/MOZ_GECKO_EXPERIMENT";
 106   tag     ::= # GIT tag name, e.g. "FIREFOX_1_5";
 107   sha1exp ::= # Any valid GIT SHA1 expression;
 108   hexsha1 ::= # SHA1 in hexadecimal format;
 109
 110      # note: name and email are UTF8 strings, however name must not
 111          # contain '<' or lf and email must not contain any of the
 112      # following: '<', '>', lf.
 113          #
 114   name  ::= # valid GIT author/committer name;
 115   email ::= # valid GIT author/committer email;
 116   ts    ::= # time since the epoch in seconds, ascii base10 notation;
 117   tz    ::= # GIT style timezone;
 118 */
 119
 120 #include "builtin.h"
 121 #include "cache.h"
 122 #include "object.h"
 123 #include "blob.h"
 124 #include "tree.h"
 125 #include "commit.h"
 126 #include "delta.h"
 127 #include "pack.h"
 128 #include "refs.h"
 129 #include "csum-file.h"
 130 #include "strbuf.h"
 131 #include "quote.h"
 132
 133 #define PACK_ID_BITS 16
 134 #define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
 135
 136 struct object_entry
 137 {
 138         struct object_entry *next;
 139         uint32_t offset;
 140         unsigned type : TYPE_BITS;
 141         unsigned pack_id : PACK_ID_BITS;
 142         unsigned char sha1[20];
 143 };
 144
 145 struct object_entry_pool
 146 {
 147         struct object_entry_pool *next_pool;
 148         struct object_entry *next_free;
 149         struct object_entry *end;
 150         struct object_entry entries[FLEX_ARRAY]; /* more */
 151 };
 152
 153 struct mark_set
 154 {
 155         union {
 156                 struct object_entry *marked[1024];
 157                 struct mark_set *sets[1024];
 158         } data;
 159         unsigned int shift;
 160 };
 161
 162 struct last_object
 163 {
 164         void *data;
 165         unsigned long len;
 166         uint32_t offset;
 167         unsigned int depth;
 168         unsigned no_free:1;
 169 };
 170
 171 struct mem_pool
 172 {
 173         struct mem_pool *next_pool;
 174         char *next_free;
 175         char *end;
 176         char space[FLEX_ARRAY]; /* more */
 177 };
 178
 179 struct atom_str
 180 {
 181         struct atom_str *next_atom;
 182         unsigned short str_len;
 183         char str_dat[FLEX_ARRAY]; /* more */
 184 };
 185
 186 struct tree_content;
 187 struct tree_entry
 188 {
 189         struct tree_content *tree;
 190         struct atom_str* name;
 191         struct tree_entry_ms
 192         {
 193                 uint16_t mode;
 194                 unsigned char sha1[20];
 195         } versions[2];
 196 };
 197
 198 struct tree_content
 199 {
 200         unsigned int entry_capacity; /* must match avail_tree_content */
 201         unsigned int entry_count;
 202         unsigned int delta_depth;
 203         struct tree_entry *entries[FLEX_ARRAY]; /* more */
 204 };
 205
 206 struct avail_tree_content
 207 {
 208         unsigned int entry_capacity; /* must match tree_content */
 209         struct avail_tree_content *next_avail;
 210 };
 211
 212 struct branch
 213 {
 214         struct branch *table_next_branch;
 215         struct branch *active_next_branch;
 216         const char *name;
 217         struct tree_entry branch_tree;
 218         uintmax_t last_commit;
 219         unsigned active : 1;
 220         unsigned pack_id : PACK_ID_BITS;
 221         unsigned char sha1[20];
 222 };
 223
 224 struct tag
 225 {
 226         struct tag *next_tag;
 227         const char *name;
 228         unsigned int pack_id;
 229         unsigned char sha1[20];
 230 };
 231
 232 struct dbuf
 233 {
 234         void *buffer;
 235         size_t capacity;
 236 };
 237
 238 struct hash_list
 239 {
 240         struct hash_list *next;
 241         unsigned char sha1[20];
 242 };
 243
 244 typedef enum {
 245         WHENSPEC_RAW = 1,
 246         WHENSPEC_RFC2822,
 247         WHENSPEC_NOW,
 248 } whenspec_type;
 249
 250 /* Configured limits on output */
 251 static unsigned long max_depth = 10;
 252 static off_t max_packsize = (1LL << 32) - 1;
 253 static int force_update;
 254
 255 /* Stats and misc. counters */
 256 static uintmax_t alloc_count;
 257 static uintmax_t marks_set_count;
 258 static uintmax_t object_count_by_type[1 << TYPE_BITS];
 259 static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
 260 static uintmax_t delta_count_by_type[1 << TYPE_BITS];
 261 static unsigned long object_count;
 262 static unsigned long branch_count;
 263 static unsigned long branch_load_count;
 264 static int failure;
 265 static FILE *pack_edges;
 266
 267 /* Memory pools */
 268 static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
 269 static size_t total_allocd;
 270 static struct mem_pool *mem_pool;
 271
 272 /* Atom management */
 273 static unsigned int atom_table_sz = 4451;
 274 static unsigned int atom_cnt;
 275 static struct atom_str **atom_table;
 276
 277 /* The .pack file being generated */
 278 static unsigned int pack_id;
 279 static struct packed_git *pack_data;
 280 static struct packed_git **all_packs;
 281 static unsigned long pack_size;
 282
 283 /* Table of objects we've written. */
 284 static unsigned int object_entry_alloc = 5000;
 285 static struct object_entry_pool *blocks;
 286 static struct object_entry *object_table[1 << 16];
 287 static struct mark_set *marks;
 288 static const char* mark_file;
 289
 290 /* Our last blob */
 291 static struct last_object last_blob;
 292
 293 /* Tree management */
 294 static unsigned int tree_entry_alloc = 1000;
 295 static void *avail_tree_entry;
 296 static unsigned int avail_tree_table_sz = 100;
 297 static struct avail_tree_content **avail_tree_table;
 298 static struct dbuf old_tree;
 299 static struct dbuf new_tree;
 300
 301 /* Branch data */
 302 static unsigned long max_active_branches = 5;
 303 static unsigned long cur_active_branches;
 304 static unsigned long branch_table_sz = 1039;
 305 static struct branch **branch_table;
 306 static struct branch *active_branches;
 307
 308 /* Tag data */
 309 static struct tag *first_tag;
 310 static struct tag *last_tag;
 311
 312 /* Input stream parsing */
 313 static whenspec_type whenspec = WHENSPEC_RAW;
 314 static struct strbuf command_buf;
 315 static uintmax_t next_mark;
 316 static struct dbuf new_data;
 317
 318
 319 static void alloc_objects(unsigned int cnt)
 320 {
 321         struct object_entry_pool *b;
 322
 323         b = xmalloc(sizeof(struct object_entry_pool)
 324                 + cnt * sizeof(struct object_entry));
 325         b->next_pool = blocks;
 326         b->next_free = b->entries;
 327         b->end = b->entries + cnt;
 328         blocks = b;
 329         alloc_count += cnt;
 330 }
 331
 332 static struct object_entry *new_object(unsigned char *sha1)
 333 {
 334         struct object_entry *e;
 335
 336         if (blocks->next_free == blocks->end)
 337                 alloc_objects(object_entry_alloc);
 338
 339         e = blocks->next_free++;
 340         hashcpy(e->sha1, sha1);
 341         return e;
 342 }
 343
 344 static struct object_entry *find_object(unsigned char *sha1)
 345 {
 346         unsigned int h = sha1[0] << 8 | sha1[1];
 347         struct object_entry *e;
 348         for (e = object_table[h]; e; e = e->next)
 349                 if (!hashcmp(sha1, e->sha1))
 350                         return e;
 351         return NULL;
 352 }
 353
 354 static struct object_entry *insert_object(unsigned char *sha1)
 355 {
 356         unsigned int h = sha1[0] << 8 | sha1[1];
 357         struct object_entry *e = object_table[h];
 358         struct object_entry *p = NULL;
 359
 360         while (e) {
 361                 if (!hashcmp(sha1, e->sha1))
 362                         return e;
 363                 p = e;
 364                 e = e->next;
 365         }
 366
 367         e = new_object(sha1);
 368         e->next = NULL;
 369         e->offset = 0;
 370         if (p)
 371                 p->next = e;
 372         else
 373                 object_table[h] = e;
 374         return e;
 375 }
 376
 377 static unsigned int hc_str(const char *s, size_t len)
 378 {
 379         unsigned int r = 0;
 380         while (len-- > 0)
 381                 r = r * 31 + *s++;
 382         return r;
 383 }
 384
 385 static void *pool_alloc(size_t len)
 386 {
 387         struct mem_pool *p;
 388         void *r;
 389
 390         for (p = mem_pool; p; p = p->next_pool)
 391                 if ((p->end - p->next_free >= len))
 392                         break;
 393
 394         if (!p) {
 395                 if (len >= (mem_pool_alloc/2)) {
 396                         total_allocd += len;
 397                         return xmalloc(len);
 398                 }
 399                 total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
 400                 p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc);
 401                 p->next_pool = mem_pool;
 402                 p->next_free = p->space;
 403                 p->end = p->next_free + mem_pool_alloc;
 404                 mem_pool = p;
 405         }
 406
 407         r = p->next_free;
 408         /* round out to a pointer alignment */
 409         if (len & (sizeof(void*) - 1))
 410                 len += sizeof(void*) - (len & (sizeof(void*) - 1));
 411         p->next_free += len;
 412         return r;
 413 }
 414
 415 static void *pool_calloc(size_t count, size_t size)
 416 {
 417         size_t len = count * size;
 418         void *r = pool_alloc(len);
 419         memset(r, 0, len);
 420         return r;
 421 }
 422
 423 static char *pool_strdup(const char *s)
 424 {
 425         char *r = pool_alloc(strlen(s) + 1);
 426         strcpy(r, s);
 427         return r;
 428 }
 429
 430 static void size_dbuf(struct dbuf *b, size_t maxlen)
 431 {
 432         if (b->buffer) {
 433                 if (b->capacity >= maxlen)
 434                         return;
 435                 free(b->buffer);
 436         }
 437         b->capacity = ((maxlen / 1024) + 1) * 1024;
 438         b->buffer = xmalloc(b->capacity);
 439 }
 440
 441 static void insert_mark(uintmax_t idnum, struct object_entry *oe)
 442 {
 443         struct mark_set *s = marks;
 444         while ((idnum >> s->shift) >= 1024) {
 445                 s = pool_calloc(1, sizeof(struct mark_set));
 446                 s->shift = marks->shift + 10;
 447                 s->data.sets[0] = marks;
 448                 marks = s;
 449         }
 450         while (s->shift) {
 451                 uintmax_t i = idnum >> s->shift;
 452                 idnum -= i << s->shift;
 453                 if (!s->data.sets[i]) {
 454                         s->data.sets[i] = pool_calloc(1, sizeof(struct mark_set));
 455                         s->data.sets[i]->shift = s->shift - 10;
 456                 }
 457                 s = s->data.sets[i];
 458         }
 459         if (!s->data.marked[idnum])
 460                 marks_set_count++;
 461         s->data.marked[idnum] = oe;
 462 }
 463
 464 static struct object_entry *find_mark(uintmax_t idnum)
 465 {
 466         uintmax_t orig_idnum = idnum;
 467         struct mark_set *s = marks;
 468         struct object_entry *oe = NULL;
 469         if ((idnum >> s->shift) < 1024) {
 470                 while (s && s->shift) {
 471                         uintmax_t i = idnum >> s->shift;
 472                         idnum -= i << s->shift;
 473                         s = s->data.sets[i];
 474                 }
 475                 if (s)
 476                         oe = s->data.marked[idnum];
 477         }
 478         if (!oe)
 479                 die("mark :%" PRIuMAX " not declared", orig_idnum);
 480         return oe;
 481 }
 482
 483 static struct atom_str *to_atom(const char *s, unsigned short len)
 484 {
 485         unsigned int hc = hc_str(s, len) % atom_table_sz;
 486         struct atom_str *c;
 487
 488         for (c = atom_table[hc]; c; c = c->next_atom)
 489                 if (c->str_len == len && !strncmp(s, c->str_dat, len))
 490                         return c;
 491
 492         c = pool_alloc(sizeof(struct atom_str) + len + 1);
 493         c->str_len = len;
 494         strncpy(c->str_dat, s, len);
 495         c->str_dat[len] = 0;
 496         c->next_atom = atom_table[hc];
 497         atom_table[hc] = c;
 498         atom_cnt++;
 499         return c;
 500 }
 501
 502 static struct branch *lookup_branch(const char *name)
 503 {
 504         unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
 505         struct branch *b;
 506
 507         for (b = branch_table[hc]; b; b = b->table_next_branch)
 508                 if (!strcmp(name, b->name))
 509                         return b;
 510         return NULL;
 511 }
 512
 513 static struct branch *new_branch(const char *name)
 514 {
 515         unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
 516         struct branch* b = lookup_branch(name);
 517
 518         if (b)
 519                 die("Invalid attempt to create duplicate branch: %s", name);
 520         if (check_ref_format(name))
 521                 die("Branch name doesn't conform to GIT standards: %s", name);
 522
 523         b = pool_calloc(1, sizeof(struct branch));
 524         b->name = pool_strdup(name);
 525         b->table_next_branch = branch_table[hc];
 526         b->branch_tree.versions[0].mode = S_IFDIR;
 527         b->branch_tree.versions[1].mode = S_IFDIR;
 528         b->active = 0;
 529         b->pack_id = MAX_PACK_ID;
 530         branch_table[hc] = b;
 531         branch_count++;
 532         return b;
 533 }
 534
 535 static unsigned int hc_entries(unsigned int cnt)
 536 {
 537         cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
 538         return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
 539 }
 540
 541 static struct tree_content *new_tree_content(unsigned int cnt)
 542 {
 543         struct avail_tree_content *f, *l = NULL;
 544         struct tree_content *t;
 545         unsigned int hc = hc_entries(cnt);
 546
 547         for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
 548                 if (f->entry_capacity >= cnt)
 549                         break;
 550
 551         if (f) {
 552                 if (l)
 553                         l->next_avail = f->next_avail;
 554                 else
 555                         avail_tree_table[hc] = f->next_avail;
 556         } else {
 557                 cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
 558                 f = pool_alloc(sizeof(*t) + sizeof(t->entries[0]) * cnt);
 559                 f->entry_capacity = cnt;
 560         }
 561
 562         t = (struct tree_content*)f;
 563         t->entry_count = 0;
 564         t->delta_depth = 0;
 565         return t;
 566 }
 567
 568 static void release_tree_entry(struct tree_entry *e);
 569 static void release_tree_content(struct tree_content *t)
 570 {
 571         struct avail_tree_content *f = (struct avail_tree_content*)t;
 572         unsigned int hc = hc_entries(f->entry_capacity);
 573         f->next_avail = avail_tree_table[hc];
 574         avail_tree_table[hc] = f;
 575 }
 576
 577 static void release_tree_content_recursive(struct tree_content *t)
 578 {
 579         unsigned int i;
 580         for (i = 0; i < t->entry_count; i++)
 581                 release_tree_entry(t->entries[i]);
 582         release_tree_content(t);
 583 }
 584
 585 static struct tree_content *grow_tree_content(
 586         struct tree_content *t,
 587         int amt)
 588 {
 589         struct tree_content *r = new_tree_content(t->entry_count + amt);
 590         r->entry_count = t->entry_count;
 591         r->delta_depth = t->delta_depth;
 592         memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
 593         release_tree_content(t);
 594         return r;
 595 }
 596
 597 static struct tree_entry *new_tree_entry(void)
 598 {
 599         struct tree_entry *e;
 600
 601         if (!avail_tree_entry) {
 602                 unsigned int n = tree_entry_alloc;
 603                 total_allocd += n * sizeof(struct tree_entry);
 604                 avail_tree_entry = e = xmalloc(n * sizeof(struct tree_entry));
 605                 while (n-- > 1) {
 606                         *((void**)e) = e + 1;
 607                         e++;
 608                 }
 609                 *((void**)e) = NULL;
 610         }
 611
 612         e = avail_tree_entry;
 613         avail_tree_entry = *((void**)e);
 614         return e;
 615 }
 616
 617 static void release_tree_entry(struct tree_entry *e)
 618 {
 619         if (e->tree)
 620                 release_tree_content_recursive(e->tree);
 621         *((void**)e) = avail_tree_entry;
 622         avail_tree_entry = e;
 623 }
 624
 625 static void start_packfile(void)
 626 {
 627         static char tmpfile[PATH_MAX];
 628         struct packed_git *p;
 629         struct pack_header hdr;
 630         int pack_fd;
 631
 632         snprintf(tmpfile, sizeof(tmpfile),
 633                 "%s/tmp_pack_XXXXXX", get_object_directory());
 634         pack_fd = mkstemp(tmpfile);
 635         if (pack_fd < 0)
 636                 die("Can't create %s: %s", tmpfile, strerror(errno));
 637         p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
 638         strcpy(p->pack_name, tmpfile);
 639         p->pack_fd = pack_fd;
 640
 641         hdr.hdr_signature = htonl(PACK_SIGNATURE);
 642         hdr.hdr_version = htonl(2);
 643         hdr.hdr_entries = 0;
 644         write_or_die(p->pack_fd, &hdr, sizeof(hdr));
 645
 646         pack_data = p;
 647         pack_size = sizeof(hdr);
 648         object_count = 0;
 649
 650         all_packs = xrealloc(all_packs, sizeof(*all_packs) * (pack_id + 1));
 651         all_packs[pack_id] = p;
 652 }
 653
 654 static void fixup_header_footer(void)
 655 {
 656         static const int buf_sz = 128 * 1024;
 657         int pack_fd = pack_data->pack_fd;
 658         SHA_CTX c;
 659         struct pack_header hdr;
 660         char *buf;
 661
 662         if (lseek(pack_fd, 0, SEEK_SET) != 0)
 663                 die("Failed seeking to start: %s", strerror(errno));
 664         if (read_in_full(pack_fd, &hdr, sizeof(hdr)) != sizeof(hdr))
 665                 die("Unable to reread header of %s", pack_data->pack_name);
 666         if (lseek(pack_fd, 0, SEEK_SET) != 0)
 667                 die("Failed seeking to start: %s", strerror(errno));
 668         hdr.hdr_entries = htonl(object_count);
 669         write_or_die(pack_fd, &hdr, sizeof(hdr));
 670
 671         SHA1_Init(&c);
 672         SHA1_Update(&c, &hdr, sizeof(hdr));
 673
 674         buf = xmalloc(buf_sz);
 675         for (;;) {
 676                 size_t n = xread(pack_fd, buf, buf_sz);
 677                 if (!n)
 678                         break;
 679                 if (n < 0)
 680                         die("Failed to checksum %s", pack_data->pack_name);
 681                 SHA1_Update(&c, buf, n);
 682         }
 683         free(buf);
 684
 685         SHA1_Final(pack_data->sha1, &c);
 686         write_or_die(pack_fd, pack_data->sha1, sizeof(pack_data->sha1));
 687         close(pack_fd);
 688 }
 689
 690 static int oecmp (const void *a_, const void *b_)
 691 {
 692         struct object_entry *a = *((struct object_entry**)a_);
 693         struct object_entry *b = *((struct object_entry**)b_);
 694         return hashcmp(a->sha1, b->sha1);
 695 }
 696
 697 static char *create_index(void)
 698 {
 699         static char tmpfile[PATH_MAX];
 700         SHA_CTX ctx;
 701         struct sha1file *f;
 702         struct object_entry **idx, **c, **last, *e;
 703         struct object_entry_pool *o;
 704         uint32_t array[256];
 705         int i, idx_fd;
 706
 707         /* Build the sorted table of object IDs. */
 708         idx = xmalloc(object_count * sizeof(struct object_entry*));
 709         c = idx;
 710         for (o = blocks; o; o = o->next_pool)
 711                 for (e = o->next_free; e-- != o->entries;)
 712                         if (pack_id == e->pack_id)
 713                                 *c++ = e;
 714         last = idx + object_count;
 715         if (c != last)
 716                 die("internal consistency error creating the index");
 717         qsort(idx, object_count, sizeof(struct object_entry*), oecmp);
 718
 719         /* Generate the fan-out array. */
 720         c = idx;
 721         for (i = 0; i < 256; i++) {
 722                 struct object_entry **next = c;;
 723                 while (next < last) {
 724                         if ((*next)->sha1[0] != i)
 725                                 break;
 726                         next++;
 727                 }
 728                 array[i] = htonl(next - idx);
 729                 c = next;
 730         }
 731
 732         snprintf(tmpfile, sizeof(tmpfile),
 733                 "%s/tmp_idx_XXXXXX", get_object_directory());
 734         idx_fd = mkstemp(tmpfile);
 735         if (idx_fd < 0)
 736                 die("Can't create %s: %s", tmpfile, strerror(errno));
 737         f = sha1fd(idx_fd, tmpfile);
 738         sha1write(f, array, 256 * sizeof(int));
 739         SHA1_Init(&ctx);
 740         for (c = idx; c != last; c++) {
 741                 uint32_t offset = htonl((*c)->offset);
 742                 sha1write(f, &offset, 4);
 743                 sha1write(f, (*c)->sha1, sizeof((*c)->sha1));
 744                 SHA1_Update(&ctx, (*c)->sha1, 20);
 745         }
 746         sha1write(f, pack_data->sha1, sizeof(pack_data->sha1));
 747         sha1close(f, NULL, 1);
 748         free(idx);
 749         SHA1_Final(pack_data->sha1, &ctx);
 750         return tmpfile;
 751 }
 752
 753 static char *keep_pack(char *curr_index_name)
 754 {
 755         static char name[PATH_MAX];
 756         static const char *keep_msg = "fast-import";
 757         int keep_fd;
 758
 759         chmod(pack_data->pack_name, 0444);
 760         chmod(curr_index_name, 0444);
 761
 762         snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
 763                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 764         keep_fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 765         if (keep_fd < 0)
 766                 die("cannot create keep file");
 767         write(keep_fd, keep_msg, strlen(keep_msg));
 768         close(keep_fd);
 769
 770         snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
 771                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 772         if (move_temp_to_file(pack_data->pack_name, name))
 773                 die("cannot store pack file");
 774
 775         snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
 776                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 777         if (move_temp_to_file(curr_index_name, name))
 778                 die("cannot store index file");
 779         return name;
 780 }
 781
 782 static void unkeep_all_packs(void)
 783 {
 784         static char name[PATH_MAX];
 785         int k;
 786
 787         for (k = 0; k < pack_id; k++) {
 788                 struct packed_git *p = all_packs[k];
 789                 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
 790                          get_object_directory(), sha1_to_hex(p->sha1));
 791                 unlink(name);
 792         }
 793 }
 794
 795 static void end_packfile(void)
 796 {
 797         struct packed_git *old_p = pack_data, *new_p;
 798
 799         if (object_count) {
 800                 char *idx_name;
 801                 int i;
 802                 struct branch *b;
 803                 struct tag *t;
 804
 805                 fixup_header_footer();
 806                 idx_name = keep_pack(create_index());
 807
 808                 /* Register the packfile with core git's machinary. */
 809                 new_p = add_packed_git(idx_name, strlen(idx_name), 1);
 810                 if (!new_p)
 811                         die("core git rejected index %s", idx_name);
 812                 new_p->windows = old_p->windows;
 813                 all_packs[pack_id] = new_p;
 814                 install_packed_git(new_p);
 815
 816                 /* Print the boundary */
 817                 if (pack_edges) {
 818                         fprintf(pack_edges, "%s:", new_p->pack_name);
 819                         for (i = 0; i < branch_table_sz; i++) {
 820                                 for (b = branch_table[i]; b; b = b->table_next_branch) {
 821                                         if (b->pack_id == pack_id)
 822                                                 fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
 823                                 }
 824                         }
 825                         for (t = first_tag; t; t = t->next_tag) {
 826                                 if (t->pack_id == pack_id)
 827                                         fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
 828                         }
 829                         fputc('\n', pack_edges);
 830                         fflush(pack_edges);
 831                 }
 832
 833                 pack_id++;
 834         }
 835         else
 836                 unlink(old_p->pack_name);
 837         free(old_p);
 838
 839         /* We can't carry a delta across packfiles. */
 840         free(last_blob.data);
 841         last_blob.data = NULL;
 842         last_blob.len = 0;
 843         last_blob.offset = 0;
 844         last_blob.depth = 0;
 845 }
 846
 847 static void cycle_packfile(void)
 848 {
 849         end_packfile();
 850         start_packfile();
 851 }
 852
 853 static size_t encode_header(
 854         enum object_type type,
 855         size_t size,
 856         unsigned char *hdr)
 857 {
 858         int n = 1;
 859         unsigned char c;
 860
 861         if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
 862                 die("bad type %d", type);
 863
 864         c = (type << 4) | (size & 15);
 865         size >>= 4;
 866         while (size) {
 867                 *hdr++ = c | 0x80;
 868                 c = size & 0x7f;
 869                 size >>= 7;
 870                 n++;
 871         }
 872         *hdr = c;
 873         return n;
 874 }
 875
 876 static int store_object(
 877         enum object_type type,
 878         void *dat,
 879         size_t datlen,
 880         struct last_object *last,
 881         unsigned char *sha1out,
 882         uintmax_t mark)
 883 {
 884         void *out, *delta;
 885         struct object_entry *e;
 886         unsigned char hdr[96];
 887         unsigned char sha1[20];
 888         unsigned long hdrlen, deltalen;
 889         SHA_CTX c;
 890         z_stream s;
 891
 892         hdrlen = sprintf((char*)hdr,"%s %lu", typename(type),
 893                 (unsigned long)datlen) + 1;
 894         SHA1_Init(&c);
 895         SHA1_Update(&c, hdr, hdrlen);
 896         SHA1_Update(&c, dat, datlen);
 897         SHA1_Final(sha1, &c);
 898         if (sha1out)
 899                 hashcpy(sha1out, sha1);
 900
 901         e = insert_object(sha1);
 902         if (mark)
 903                 insert_mark(mark, e);
 904         if (e->offset) {
 905                 duplicate_count_by_type[type]++;
 906                 return 1;
 907         }
 908
 909         if (last && last->data && last->depth < max_depth) {
 910                 delta = diff_delta(last->data, last->len,
 911                         dat, datlen,
 912                         &deltalen, 0);
 913                 if (delta && deltalen >= datlen) {
 914                         free(delta);
 915                         delta = NULL;
 916                 }
 917         } else
 918                 delta = NULL;
 919
 920         memset(&s, 0, sizeof(s));
 921         deflateInit(&s, zlib_compression_level);
 922         if (delta) {
 923                 s.next_in = delta;
 924                 s.avail_in = deltalen;
 925         } else {
 926                 s.next_in = dat;
 927                 s.avail_in = datlen;
 928         }
 929         s.avail_out = deflateBound(&s, s.avail_in);
 930         s.next_out = out = xmalloc(s.avail_out);
 931         while (deflate(&s, Z_FINISH) == Z_OK)
 932                 /* nothing */;
 933         deflateEnd(&s);
 934
 935         /* Determine if we should auto-checkpoint. */
 936         if ((pack_size + 60 + s.total_out) > max_packsize
 937                 || (pack_size + 60 + s.total_out) < pack_size) {
 938
 939                 /* This new object needs to *not* have the current pack_id. */
 940                 e->pack_id = pack_id + 1;
 941                 cycle_packfile();
 942
 943                 /* We cannot carry a delta into the new pack. */
 944                 if (delta) {
 945                         free(delta);
 946                         delta = NULL;
 947
 948                         memset(&s, 0, sizeof(s));
 949                         deflateInit(&s, zlib_compression_level);
 950                         s.next_in = dat;
 951                         s.avail_in = datlen;
 952                         s.avail_out = deflateBound(&s, s.avail_in);
 953                         s.next_out = out = xrealloc(out, s.avail_out);
 954                         while (deflate(&s, Z_FINISH) == Z_OK)
 955                                 /* nothing */;
 956                         deflateEnd(&s);
 957                 }
 958         }
 959
 960         e->type = type;
 961         e->pack_id = pack_id;
 962         e->offset = pack_size;
 963         object_count++;
 964         object_count_by_type[type]++;
 965
 966         if (delta) {
 967                 unsigned long ofs = e->offset - last->offset;
 968                 unsigned pos = sizeof(hdr) - 1;
 969
 970                 delta_count_by_type[type]++;
 971                 last->depth++;
 972
 973                 hdrlen = encode_header(OBJ_OFS_DELTA, deltalen, hdr);
 974                 write_or_die(pack_data->pack_fd, hdr, hdrlen);
 975                 pack_size += hdrlen;
 976
 977                 hdr[pos] = ofs & 127;
 978                 while (ofs >>= 7)
 979                         hdr[--pos] = 128 | (--ofs & 127);
 980                 write_or_die(pack_data->pack_fd, hdr + pos, sizeof(hdr) - pos);
 981                 pack_size += sizeof(hdr) - pos;
 982         } else {
 983                 if (last)
 984                         last->depth = 0;
 985                 hdrlen = encode_header(type, datlen, hdr);
 986                 write_or_die(pack_data->pack_fd, hdr, hdrlen);
 987                 pack_size += hdrlen;
 988         }
 989
 990         write_or_die(pack_data->pack_fd, out, s.total_out);
 991         pack_size += s.total_out;
 992
 993         free(out);
 994         free(delta);
 995         if (last) {
 996                 if (!last->no_free)
 997                         free(last->data);
 998                 last->data = dat;
 999                 last->offset = e->offset;
1000                 last->len = datlen;
1001         }
1002         return 0;
1003 }
1004
1005 static void *gfi_unpack_entry(
1006         struct object_entry *oe,
1007         unsigned long *sizep)
1008 {
1009         enum object_type type;
1010         struct packed_git *p = all_packs[oe->pack_id];
1011         if (p == pack_data)
1012                 p->pack_size = pack_size + 20;
1013         return unpack_entry(p, oe->offset, &type, sizep);
1014 }
1015
1016 static const char *get_mode(const char *str, uint16_t *modep)
1017 {
1018         unsigned char c;
1019         uint16_t mode = 0;
1020
1021         while ((c = *str++) != ' ') {
1022                 if (c < '0' || c > '7')
1023                         return NULL;
1024                 mode = (mode << 3) + (c - '0');
1025         }
1026         *modep = mode;
1027         return str;
1028 }
1029
1030 static void load_tree(struct tree_entry *root)
1031 {
1032         unsigned char* sha1 = root->versions[1].sha1;
1033         struct object_entry *myoe;
1034         struct tree_content *t;
1035         unsigned long size;
1036         char *buf;
1037         const char *c;
1038
1039         root->tree = t = new_tree_content(8);
1040         if (is_null_sha1(sha1))
1041                 return;
1042
1043         myoe = find_object(sha1);
1044         if (myoe) {
1045                 if (myoe->type != OBJ_TREE)
1046                         die("Not a tree: %s", sha1_to_hex(sha1));
1047                 t->delta_depth = 0;
1048                 buf = gfi_unpack_entry(myoe, &size);
1049         } else {
1050                 enum object_type type;
1051                 buf = read_sha1_file(sha1, &type, &size);
1052                 if (!buf || type != OBJ_TREE)
1053                         die("Can't load tree %s", sha1_to_hex(sha1));
1054         }
1055
1056         c = buf;
1057         while (c != (buf + size)) {
1058                 struct tree_entry *e = new_tree_entry();
1059
1060                 if (t->entry_count == t->entry_capacity)
1061                         root->tree = t = grow_tree_content(t, t->entry_count);
1062                 t->entries[t->entry_count++] = e;
1063
1064                 e->tree = NULL;
1065                 c = get_mode(c, &e->versions[1].mode);
1066                 if (!c)
1067                         die("Corrupt mode in %s", sha1_to_hex(sha1));
1068                 e->versions[0].mode = e->versions[1].mode;
1069                 e->name = to_atom(c, strlen(c));
1070                 c += e->name->str_len + 1;
1071                 hashcpy(e->versions[0].sha1, (unsigned char*)c);
1072                 hashcpy(e->versions[1].sha1, (unsigned char*)c);
1073                 c += 20;
1074         }
1075         free(buf);
1076 }
1077
1078 static int tecmp0 (const void *_a, const void *_b)
1079 {
1080         struct tree_entry *a = *((struct tree_entry**)_a);
1081         struct tree_entry *b = *((struct tree_entry**)_b);
1082         return base_name_compare(
1083                 a->name->str_dat, a->name->str_len, a->versions[0].mode,
1084                 b->name->str_dat, b->name->str_len, b->versions[0].mode);
1085 }
1086
1087 static int tecmp1 (const void *_a, const void *_b)
1088 {
1089         struct tree_entry *a = *((struct tree_entry**)_a);
1090         struct tree_entry *b = *((struct tree_entry**)_b);
1091         return base_name_compare(
1092                 a->name->str_dat, a->name->str_len, a->versions[1].mode,
1093                 b->name->str_dat, b->name->str_len, b->versions[1].mode);
1094 }
1095
1096 static void mktree(struct tree_content *t,
1097         int v,
1098         unsigned long *szp,
1099         struct dbuf *b)
1100 {
1101         size_t maxlen = 0;
1102         unsigned int i;
1103         char *c;
1104
1105         if (!v)
1106                 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0);
1107         else
1108                 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1);
1109
1110         for (i = 0; i < t->entry_count; i++) {
1111                 if (t->entries[i]->versions[v].mode)
1112                         maxlen += t->entries[i]->name->str_len + 34;
1113         }
1114
1115         size_dbuf(b, maxlen);
1116         c = b->buffer;
1117         for (i = 0; i < t->entry_count; i++) {
1118                 struct tree_entry *e = t->entries[i];
1119                 if (!e->versions[v].mode)
1120                         continue;
1121                 c += sprintf(c, "%o", (unsigned int)e->versions[v].mode);
1122                 *c++ = ' ';
1123                 strcpy(c, e->name->str_dat);
1124                 c += e->name->str_len + 1;
1125                 hashcpy((unsigned char*)c, e->versions[v].sha1);
1126                 c += 20;
1127         }
1128         *szp = c - (char*)b->buffer;
1129 }
1130
1131 static void store_tree(struct tree_entry *root)
1132 {
1133         struct tree_content *t = root->tree;
1134         unsigned int i, j, del;
1135         unsigned long new_len;
1136         struct last_object lo;
1137         struct object_entry *le;
1138
1139         if (!is_null_sha1(root->versions[1].sha1))
1140                 return;
1141
1142         for (i = 0; i < t->entry_count; i++) {
1143                 if (t->entries[i]->tree)
1144                         store_tree(t->entries[i]);
1145         }
1146
1147         le = find_object(root->versions[0].sha1);
1148         if (!S_ISDIR(root->versions[0].mode)
1149                 || !le
1150                 || le->pack_id != pack_id) {
1151                 lo.data = NULL;
1152                 lo.depth = 0;
1153         } else {
1154                 mktree(t, 0, &lo.len, &old_tree);
1155                 lo.data = old_tree.buffer;
1156                 lo.offset = le->offset;
1157                 lo.depth = t->delta_depth;
1158                 lo.no_free = 1;
1159         }
1160
1161         mktree(t, 1, &new_len, &new_tree);
1162         store_object(OBJ_TREE, new_tree.buffer, new_len,
1163                 &lo, root->versions[1].sha1, 0);
1164
1165         t->delta_depth = lo.depth;
1166         for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
1167                 struct tree_entry *e = t->entries[i];
1168                 if (e->versions[1].mode) {
1169                         e->versions[0].mode = e->versions[1].mode;
1170                         hashcpy(e->versions[0].sha1, e->versions[1].sha1);
1171                         t->entries[j++] = e;
1172                 } else {
1173                         release_tree_entry(e);
1174                         del++;
1175                 }
1176         }
1177         t->entry_count -= del;
1178 }
1179
1180 static int tree_content_set(
1181         struct tree_entry *root,
1182         const char *p,
1183         const unsigned char *sha1,
1184         const uint16_t mode)
1185 {
1186         struct tree_content *t = root->tree;
1187         const char *slash1;
1188         unsigned int i, n;
1189         struct tree_entry *e;
1190
1191         slash1 = strchr(p, '/');
1192         if (slash1)
1193                 n = slash1 - p;
1194         else
1195                 n = strlen(p);
1196         if (!n)
1197                 die("Empty path component found in input");
1198
1199         for (i = 0; i < t->entry_count; i++) {
1200                 e = t->entries[i];
1201                 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1202                         if (!slash1) {
1203                                 if (e->versions[1].mode == mode
1204                                                 && !hashcmp(e->versions[1].sha1, sha1))
1205                                         return 0;
1206                                 e->versions[1].mode = mode;
1207                                 hashcpy(e->versions[1].sha1, sha1);
1208                                 if (e->tree) {
1209                                         release_tree_content_recursive(e->tree);
1210                                         e->tree = NULL;
1211                                 }
1212                                 hashclr(root->versions[1].sha1);
1213                                 return 1;
1214                         }
1215                         if (!S_ISDIR(e->versions[1].mode)) {
1216                                 e->tree = new_tree_content(8);
1217                                 e->versions[1].mode = S_IFDIR;
1218                         }
1219                         if (!e->tree)
1220                                 load_tree(e);
1221                         if (tree_content_set(e, slash1 + 1, sha1, mode)) {
1222                                 hashclr(root->versions[1].sha1);
1223                                 return 1;
1224                         }
1225                         return 0;
1226                 }
1227         }
1228
1229         if (t->entry_count == t->entry_capacity)
1230                 root->tree = t = grow_tree_content(t, t->entry_count);
1231         e = new_tree_entry();
1232         e->name = to_atom(p, n);
1233         e->versions[0].mode = 0;
1234         hashclr(e->versions[0].sha1);
1235         t->entries[t->entry_count++] = e;
1236         if (slash1) {
1237                 e->tree = new_tree_content(8);
1238                 e->versions[1].mode = S_IFDIR;
1239                 tree_content_set(e, slash1 + 1, sha1, mode);
1240         } else {
1241                 e->tree = NULL;
1242                 e->versions[1].mode = mode;
1243                 hashcpy(e->versions[1].sha1, sha1);
1244         }
1245         hashclr(root->versions[1].sha1);
1246         return 1;
1247 }
1248
1249 static int tree_content_remove(struct tree_entry *root, const char *p)
1250 {
1251         struct tree_content *t = root->tree;
1252         const char *slash1;
1253         unsigned int i, n;
1254         struct tree_entry *e;
1255
1256         slash1 = strchr(p, '/');
1257         if (slash1)
1258                 n = slash1 - p;
1259         else
1260                 n = strlen(p);
1261
1262         for (i = 0; i < t->entry_count; i++) {
1263                 e = t->entries[i];
1264                 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1265                         if (!slash1 || !S_ISDIR(e->versions[1].mode))
1266                                 goto del_entry;
1267                         if (!e->tree)
1268                                 load_tree(e);
1269                         if (tree_content_remove(e, slash1 + 1)) {
1270                                 for (n = 0; n < e->tree->entry_count; n++) {
1271                                         if (e->tree->entries[n]->versions[1].mode) {
1272                                                 hashclr(root->versions[1].sha1);
1273                                                 return 1;
1274                                         }
1275                                 }
1276                                 goto del_entry;
1277                         }
1278                         return 0;
1279                 }
1280         }
1281         return 0;
1282
1283 del_entry:
1284         if (e->tree) {
1285                 release_tree_content_recursive(e->tree);
1286                 e->tree = NULL;
1287         }
1288         e->versions[1].mode = 0;
1289         hashclr(e->versions[1].sha1);
1290         hashclr(root->versions[1].sha1);
1291         return 1;
1292 }
1293
1294 static int update_branch(struct branch *b)
1295 {
1296         static const char *msg = "fast-import";
1297         struct ref_lock *lock;
1298         unsigned char old_sha1[20];
1299
1300         if (read_ref(b->name, old_sha1))
1301                 hashclr(old_sha1);
1302         lock = lock_any_ref_for_update(b->name, old_sha1);
1303         if (!lock)
1304                 return error("Unable to lock %s", b->name);
1305         if (!force_update && !is_null_sha1(old_sha1)) {
1306                 struct commit *old_cmit, *new_cmit;
1307
1308                 old_cmit = lookup_commit_reference_gently(old_sha1, 0);
1309                 new_cmit = lookup_commit_reference_gently(b->sha1, 0);
1310                 if (!old_cmit || !new_cmit) {
1311                         unlock_ref(lock);
1312                         return error("Branch %s is missing commits.", b->name);
1313                 }
1314
1315                 if (!in_merge_bases(old_cmit, &new_cmit, 1)) {
1316                         unlock_ref(lock);
1317                         warning("Not updating %s"
1318                                 " (new tip %s does not contain %s)",
1319                                 b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
1320                         return -1;
1321                 }
1322         }
1323         if (write_ref_sha1(lock, b->sha1, msg) < 0)
1324                 return error("Unable to update %s", b->name);
1325         return 0;
1326 }
1327
1328 static void dump_branches(void)
1329 {
1330         unsigned int i;
1331         struct branch *b;
1332
1333         for (i = 0; i < branch_table_sz; i++) {
1334                 for (b = branch_table[i]; b; b = b->table_next_branch)
1335                         failure |= update_branch(b);
1336         }
1337 }
1338
1339 static void dump_tags(void)
1340 {
1341         static const char *msg = "fast-import";
1342         struct tag *t;
1343         struct ref_lock *lock;
1344         char ref_name[PATH_MAX];
1345
1346         for (t = first_tag; t; t = t->next_tag) {
1347                 sprintf(ref_name, "tags/%s", t->name);
1348                 lock = lock_ref_sha1(ref_name, NULL);
1349                 if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0)
1350                         failure |= error("Unable to update %s", ref_name);
1351         }
1352 }
1353
1354 static void dump_marks_helper(FILE *f,
1355         uintmax_t base,
1356         struct mark_set *m)
1357 {
1358         uintmax_t k;
1359         if (m->shift) {
1360                 for (k = 0; k < 1024; k++) {
1361                         if (m->data.sets[k])
1362                                 dump_marks_helper(f, (base + k) << m->shift,
1363                                         m->data.sets[k]);
1364                 }
1365         } else {
1366                 for (k = 0; k < 1024; k++) {
1367                         if (m->data.marked[k])
1368                                 fprintf(f, ":%" PRIuMAX " %s\n", base + k,
1369                                         sha1_to_hex(m->data.marked[k]->sha1));
1370                 }
1371         }
1372 }
1373
1374 static void dump_marks(void)
1375 {
1376         static struct lock_file mark_lock;
1377         int mark_fd;
1378         FILE *f;
1379
1380         if (!mark_file)
1381                 return;
1382
1383         mark_fd = hold_lock_file_for_update(&mark_lock, mark_file, 0);
1384         if (mark_fd < 0) {
1385                 failure |= error("Unable to write marks file %s: %s",
1386                         mark_file, strerror(errno));
1387                 return;
1388         }
1389
1390         f = fdopen(mark_fd, "w");
1391         if (!f) {
1392                 rollback_lock_file(&mark_lock);
1393                 failure |= error("Unable to write marks file %s: %s",
1394                         mark_file, strerror(errno));
1395                 return;
1396         }
1397
1398         dump_marks_helper(f, 0, marks);
1399         fclose(f);
1400         if (commit_lock_file(&mark_lock))
1401                 failure |= error("Unable to write marks file %s: %s",
1402                         mark_file, strerror(errno));
1403 }
1404
1405 static void read_next_command(void)
1406 {
1407         read_line(&command_buf, stdin, '\n');
1408 }
1409
1410 static void cmd_mark(void)
1411 {
1412         if (!prefixcmp(command_buf.buf, "mark :")) {
1413                 next_mark = strtoumax(command_buf.buf + 6, NULL, 10);
1414                 read_next_command();
1415         }
1416         else
1417                 next_mark = 0;
1418 }
1419
1420 static void *cmd_data (size_t *size)
1421 {
1422         size_t length;
1423         char *buffer;
1424
1425         if (prefixcmp(command_buf.buf, "data "))
1426                 die("Expected 'data n' command, found: %s", command_buf.buf);
1427
1428         if (!prefixcmp(command_buf.buf + 5, "<<")) {
1429                 char *term = xstrdup(command_buf.buf + 5 + 2);
1430                 size_t sz = 8192, term_len = command_buf.len - 5 - 2;
1431                 length = 0;
1432                 buffer = xmalloc(sz);
1433                 for (;;) {
1434                         read_next_command();
1435                         if (command_buf.eof)
1436                                 die("EOF in data (terminator '%s' not found)", term);
1437                         if (term_len == command_buf.len
1438                                 && !strcmp(term, command_buf.buf))
1439                                 break;
1440                         if (sz < (length + command_buf.len)) {
1441                                 sz = sz * 3 / 2 + 16;
1442                                 if (sz < (length + command_buf.len))
1443                                         sz = length + command_buf.len;
1444                                 buffer = xrealloc(buffer, sz);
1445                         }
1446                         memcpy(buffer + length,
1447                                 command_buf.buf,
1448                                 command_buf.len - 1);
1449                         length += command_buf.len - 1;
1450                         buffer[length++] = '\n';
1451                 }
1452                 free(term);
1453         }
1454         else {
1455                 size_t n = 0;
1456                 length = strtoul(command_buf.buf + 5, NULL, 10);
1457                 buffer = xmalloc(length);
1458                 while (n < length) {
1459                         size_t s = fread(buffer + n, 1, length - n, stdin);
1460                         if (!s && feof(stdin))
1461                                 die("EOF in data (%lu bytes remaining)",
1462                                         (unsigned long)(length - n));
1463                         n += s;
1464                 }
1465         }
1466
1467         if (fgetc(stdin) != '\n')
1468                 die("An lf did not trail the binary data as expected.");
1469
1470         *size = length;
1471         return buffer;
1472 }
1473
1474 static int validate_raw_date(const char *src, char *result, int maxlen)
1475 {
1476         const char *orig_src = src;
1477         char *endp, sign;
1478
1479         strtoul(src, &endp, 10);
1480         if (endp == src || *endp != ' ')
1481                 return -1;
1482
1483         src = endp + 1;
1484         if (*src != '-' && *src != '+')
1485                 return -1;
1486         sign = *src;
1487
1488         strtoul(src + 1, &endp, 10);
1489         if (endp == src || *endp || (endp - orig_src) >= maxlen)
1490                 return -1;
1491
1492         strcpy(result, orig_src);
1493         return 0;
1494 }
1495
1496 static char *parse_ident(const char *buf)
1497 {
1498         const char *gt;
1499         size_t name_len;
1500         char *ident;
1501
1502         gt = strrchr(buf, '>');
1503         if (!gt)
1504                 die("Missing > in ident string: %s", buf);
1505         gt++;
1506         if (*gt != ' ')
1507                 die("Missing space after > in ident string: %s", buf);
1508         gt++;
1509         name_len = gt - buf;
1510         ident = xmalloc(name_len + 24);
1511         strncpy(ident, buf, name_len);
1512
1513         switch (whenspec) {
1514         case WHENSPEC_RAW:
1515                 if (validate_raw_date(gt, ident + name_len, 24) < 0)
1516                         die("Invalid raw date \"%s\" in ident: %s", gt, buf);
1517                 break;
1518         case WHENSPEC_RFC2822:
1519                 if (parse_date(gt, ident + name_len, 24) < 0)
1520                         die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf);
1521                 break;
1522         case WHENSPEC_NOW:
1523                 if (strcmp("now", gt))
1524                         die("Date in ident must be 'now': %s", buf);
1525                 datestamp(ident + name_len, 24);
1526                 break;
1527         }
1528
1529         return ident;
1530 }
1531
1532 static void cmd_new_blob(void)
1533 {
1534         size_t l;
1535         void *d;
1536
1537         read_next_command();
1538         cmd_mark();
1539         d = cmd_data(&l);
1540
1541         if (store_object(OBJ_BLOB, d, l, &last_blob, NULL, next_mark))
1542                 free(d);
1543 }
1544
1545 static void unload_one_branch(void)
1546 {
1547         while (cur_active_branches
1548                 && cur_active_branches >= max_active_branches) {
1549                 uintmax_t min_commit = ULONG_MAX;
1550                 struct branch *e, *l = NULL, *p = NULL;
1551
1552                 for (e = active_branches; e; e = e->active_next_branch) {
1553                         if (e->last_commit < min_commit) {
1554                                 p = l;
1555                                 min_commit = e->last_commit;
1556                         }
1557                         l = e;
1558                 }
1559
1560                 if (p) {
1561                         e = p->active_next_branch;
1562                         p->active_next_branch = e->active_next_branch;
1563                 } else {
1564                         e = active_branches;
1565                         active_branches = e->active_next_branch;
1566                 }
1567                 e->active = 0;
1568                 e->active_next_branch = NULL;
1569                 if (e->branch_tree.tree) {
1570                         release_tree_content_recursive(e->branch_tree.tree);
1571                         e->branch_tree.tree = NULL;
1572                 }
1573                 cur_active_branches--;
1574         }
1575 }
1576
1577 static void load_branch(struct branch *b)
1578 {
1579         load_tree(&b->branch_tree);
1580         if (!b->active) {
1581                 b->active = 1;
1582                 b->active_next_branch = active_branches;
1583                 active_branches = b;
1584                 cur_active_branches++;
1585                 branch_load_count++;
1586         }
1587 }
1588
1589 static void file_change_m(struct branch *b)
1590 {
1591         const char *p = command_buf.buf + 2;
1592         char *p_uq;
1593         const char *endp;
1594         struct object_entry *oe = oe;
1595         unsigned char sha1[20];
1596         uint16_t mode, inline_data = 0;
1597
1598         p = get_mode(p, &mode);
1599         if (!p)
1600                 die("Corrupt mode: %s", command_buf.buf);
1601         switch (mode) {
1602         case S_IFREG | 0644:
1603         case S_IFREG | 0755:
1604         case S_IFLNK:
1605         case 0644:
1606         case 0755:
1607                 /* ok */
1608                 break;
1609         default:
1610                 die("Corrupt mode: %s", command_buf.buf);
1611         }
1612
1613         if (*p == ':') {
1614                 char *x;
1615                 oe = find_mark(strtoumax(p + 1, &x, 10));
1616                 hashcpy(sha1, oe->sha1);
1617                 p = x;
1618         } else if (!prefixcmp(p, "inline")) {
1619                 inline_data = 1;
1620                 p += 6;
1621         } else {
1622                 if (get_sha1_hex(p, sha1))
1623                         die("Invalid SHA1: %s", command_buf.buf);
1624                 oe = find_object(sha1);
1625                 p += 40;
1626         }
1627         if (*p++ != ' ')
1628                 die("Missing space after SHA1: %s", command_buf.buf);
1629
1630         p_uq = unquote_c_style(p, &endp);
1631         if (p_uq) {
1632                 if (*endp)
1633                         die("Garbage after path in: %s", command_buf.buf);
1634                 p = p_uq;
1635         }
1636
1637         if (inline_data) {
1638                 size_t l;
1639                 void *d;
1640                 if (!p_uq)
1641                         p = p_uq = xstrdup(p);
1642                 read_next_command();
1643                 d = cmd_data(&l);
1644                 if (store_object(OBJ_BLOB, d, l, &last_blob, sha1, 0))
1645                         free(d);
1646         } else if (oe) {
1647                 if (oe->type != OBJ_BLOB)
1648                         die("Not a blob (actually a %s): %s",
1649                                 command_buf.buf, typename(oe->type));
1650         } else {
1651                 enum object_type type = sha1_object_info(sha1, NULL);
1652                 if (type < 0)
1653                         die("Blob not found: %s", command_buf.buf);
1654                 if (type != OBJ_BLOB)
1655                         die("Not a blob (actually a %s): %s",
1656                             typename(type), command_buf.buf);
1657         }
1658
1659         tree_content_set(&b->branch_tree, p, sha1, S_IFREG | mode);
1660         free(p_uq);
1661 }
1662
1663 static void file_change_d(struct branch *b)
1664 {
1665         const char *p = command_buf.buf + 2;
1666         char *p_uq;
1667         const char *endp;
1668
1669         p_uq = unquote_c_style(p, &endp);
1670         if (p_uq) {
1671                 if (*endp)
1672                         die("Garbage after path in: %s", command_buf.buf);
1673                 p = p_uq;
1674         }
1675         tree_content_remove(&b->branch_tree, p);
1676         free(p_uq);
1677 }
1678
1679 static void file_change_deleteall(struct branch *b)
1680 {
1681         release_tree_content_recursive(b->branch_tree.tree);
1682         hashclr(b->branch_tree.versions[0].sha1);
1683         hashclr(b->branch_tree.versions[1].sha1);
1684         load_tree(&b->branch_tree);
1685 }
1686
1687 static void cmd_from(struct branch *b)
1688 {
1689         const char *from;
1690         struct branch *s;
1691
1692         if (prefixcmp(command_buf.buf, "from "))
1693                 return;
1694
1695         if (b->branch_tree.tree) {
1696                 release_tree_content_recursive(b->branch_tree.tree);
1697                 b->branch_tree.tree = NULL;
1698         }
1699
1700         from = strchr(command_buf.buf, ' ') + 1;
1701         s = lookup_branch(from);
1702         if (b == s)
1703                 die("Can't create a branch from itself: %s", b->name);
1704         else if (s) {
1705                 unsigned char *t = s->branch_tree.versions[1].sha1;
1706                 hashcpy(b->sha1, s->sha1);
1707                 hashcpy(b->branch_tree.versions[0].sha1, t);
1708                 hashcpy(b->branch_tree.versions[1].sha1, t);
1709         } else if (*from == ':') {
1710                 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1711                 struct object_entry *oe = find_mark(idnum);
1712                 unsigned long size;
1713                 char *buf;
1714                 if (oe->type != OBJ_COMMIT)
1715                         die("Mark :%" PRIuMAX " not a commit", idnum);
1716                 hashcpy(b->sha1, oe->sha1);
1717                 buf = gfi_unpack_entry(oe, &size);
1718                 if (!buf || size < 46)
1719                         die("Not a valid commit: %s", from);
1720                 if (memcmp("tree ", buf, 5)
1721                         || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
1722                         die("The commit %s is corrupt", sha1_to_hex(b->sha1));
1723                 free(buf);
1724                 hashcpy(b->branch_tree.versions[0].sha1,
1725                         b->branch_tree.versions[1].sha1);
1726         } else if (!get_sha1(from, b->sha1)) {
1727                 if (is_null_sha1(b->sha1)) {
1728                         hashclr(b->branch_tree.versions[0].sha1);
1729                         hashclr(b->branch_tree.versions[1].sha1);
1730                 } else {
1731                         unsigned long size;
1732                         char *buf;
1733
1734                         buf = read_object_with_reference(b->sha1,
1735                                 commit_type, &size, b->sha1);
1736                         if (!buf || size < 46)
1737                                 die("Not a valid commit: %s", from);
1738                         if (memcmp("tree ", buf, 5)
1739                                 || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
1740                                 die("The commit %s is corrupt", sha1_to_hex(b->sha1));
1741                         free(buf);
1742                         hashcpy(b->branch_tree.versions[0].sha1,
1743                                 b->branch_tree.versions[1].sha1);
1744                 }
1745         } else
1746                 die("Invalid ref name or SHA1 expression: %s", from);
1747
1748         read_next_command();
1749 }
1750
1751 static struct hash_list *cmd_merge(unsigned int *count)
1752 {
1753         struct hash_list *list = NULL, *n, *e = e;
1754         const char *from;
1755         struct branch *s;
1756
1757         *count = 0;
1758         while (!prefixcmp(command_buf.buf, "merge ")) {
1759                 from = strchr(command_buf.buf, ' ') + 1;
1760                 n = xmalloc(sizeof(*n));
1761                 s = lookup_branch(from);
1762                 if (s)
1763                         hashcpy(n->sha1, s->sha1);
1764                 else if (*from == ':') {
1765                         uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1766                         struct object_entry *oe = find_mark(idnum);
1767                         if (oe->type != OBJ_COMMIT)
1768                                 die("Mark :%" PRIuMAX " not a commit", idnum);
1769                         hashcpy(n->sha1, oe->sha1);
1770                 } else if (!get_sha1(from, n->sha1)) {
1771                         unsigned long size;
1772                         char *buf = read_object_with_reference(n->sha1,
1773                                 commit_type, &size, n->sha1);
1774                         if (!buf || size < 46)
1775                                 die("Not a valid commit: %s", from);
1776                         free(buf);
1777                 } else
1778                         die("Invalid ref name or SHA1 expression: %s", from);
1779
1780                 n->next = NULL;
1781                 if (list)
1782                         e->next = n;
1783                 else
1784                         list = n;
1785                 e = n;
1786                 (*count)++;
1787                 read_next_command();
1788         }
1789         return list;
1790 }
1791
1792 static void cmd_new_commit(void)
1793 {
1794         struct branch *b;
1795         void *msg;
1796         size_t msglen;
1797         char *sp;
1798         char *author = NULL;
1799         char *committer = NULL;
1800         struct hash_list *merge_list = NULL;
1801         unsigned int merge_count;
1802
1803         /* Obtain the branch name from the rest of our command */
1804         sp = strchr(command_buf.buf, ' ') + 1;
1805         b = lookup_branch(sp);
1806         if (!b)
1807                 b = new_branch(sp);
1808
1809         read_next_command();
1810         cmd_mark();
1811         if (!prefixcmp(command_buf.buf, "author ")) {
1812                 author = parse_ident(command_buf.buf + 7);
1813                 read_next_command();
1814         }
1815         if (!prefixcmp(command_buf.buf, "committer ")) {
1816                 committer = parse_ident(command_buf.buf + 10);
1817                 read_next_command();
1818         }
1819         if (!committer)
1820                 die("Expected committer but didn't get one");
1821         msg = cmd_data(&msglen);
1822         read_next_command();
1823         cmd_from(b);
1824         merge_list = cmd_merge(&merge_count);
1825
1826         /* ensure the branch is active/loaded */
1827         if (!b->branch_tree.tree || !max_active_branches) {
1828                 unload_one_branch();
1829                 load_branch(b);
1830         }
1831
1832         /* file_change* */
1833         for (;;) {
1834                 if (1 == command_buf.len)
1835                         break;
1836                 else if (!prefixcmp(command_buf.buf, "M "))
1837                         file_change_m(b);
1838                 else if (!prefixcmp(command_buf.buf, "D "))
1839                         file_change_d(b);
1840                 else if (!strcmp("deleteall", command_buf.buf))
1841                         file_change_deleteall(b);
1842                 else
1843                         die("Unsupported file_change: %s", command_buf.buf);
1844                 read_next_command();
1845         }
1846
1847         /* build the tree and the commit */
1848         store_tree(&b->branch_tree);
1849         hashcpy(b->branch_tree.versions[0].sha1,
1850                 b->branch_tree.versions[1].sha1);
1851         size_dbuf(&new_data, 114 + msglen
1852                 + merge_count * 49
1853                 + (author
1854                         ? strlen(author) + strlen(committer)
1855                         : 2 * strlen(committer)));
1856         sp = new_data.buffer;
1857         sp += sprintf(sp, "tree %s\n",
1858                 sha1_to_hex(b->branch_tree.versions[1].sha1));
1859         if (!is_null_sha1(b->sha1))
1860                 sp += sprintf(sp, "parent %s\n", sha1_to_hex(b->sha1));
1861         while (merge_list) {
1862                 struct hash_list *next = merge_list->next;
1863                 sp += sprintf(sp, "parent %s\n", sha1_to_hex(merge_list->sha1));
1864                 free(merge_list);
1865                 merge_list = next;
1866         }
1867         sp += sprintf(sp, "author %s\n", author ? author : committer);
1868         sp += sprintf(sp, "committer %s\n", committer);
1869         *sp++ = '\n';
1870         memcpy(sp, msg, msglen);
1871         sp += msglen;
1872         free(author);
1873         free(committer);
1874         free(msg);
1875
1876         if (!store_object(OBJ_COMMIT,
1877                 new_data.buffer, sp - (char*)new_data.buffer,
1878                 NULL, b->sha1, next_mark))
1879                 b->pack_id = pack_id;
1880         b->last_commit = object_count_by_type[OBJ_COMMIT];
1881 }
1882
1883 static void cmd_new_tag(void)
1884 {
1885         char *sp;
1886         const char *from;
1887         char *tagger;
1888         struct branch *s;
1889         void *msg;
1890         size_t msglen;
1891         struct tag *t;
1892         uintmax_t from_mark = 0;
1893         unsigned char sha1[20];
1894
1895         /* Obtain the new tag name from the rest of our command */
1896         sp = strchr(command_buf.buf, ' ') + 1;
1897         t = pool_alloc(sizeof(struct tag));
1898         t->next_tag = NULL;
1899         t->name = pool_strdup(sp);
1900         if (last_tag)
1901                 last_tag->next_tag = t;
1902         else
1903                 first_tag = t;
1904         last_tag = t;
1905         read_next_command();
1906
1907         /* from ... */
1908         if (prefixcmp(command_buf.buf, "from "))
1909                 die("Expected from command, got %s", command_buf.buf);
1910         from = strchr(command_buf.buf, ' ') + 1;
1911         s = lookup_branch(from);
1912         if (s) {
1913                 hashcpy(sha1, s->sha1);
1914         } else if (*from == ':') {
1915                 struct object_entry *oe;
1916                 from_mark = strtoumax(from + 1, NULL, 10);
1917                 oe = find_mark(from_mark);
1918                 if (oe->type != OBJ_COMMIT)
1919                         die("Mark :%" PRIuMAX " not a commit", from_mark);
1920                 hashcpy(sha1, oe->sha1);
1921         } else if (!get_sha1(from, sha1)) {
1922                 unsigned long size;
1923                 char *buf;
1924
1925                 buf = read_object_with_reference(sha1,
1926                         commit_type, &size, sha1);
1927                 if (!buf || size < 46)
1928                         die("Not a valid commit: %s", from);
1929                 free(buf);
1930         } else
1931                 die("Invalid ref name or SHA1 expression: %s", from);
1932         read_next_command();
1933
1934         /* tagger ... */
1935         if (prefixcmp(command_buf.buf, "tagger "))
1936                 die("Expected tagger command, got %s", command_buf.buf);
1937         tagger = parse_ident(command_buf.buf + 7);
1938
1939         /* tag payload/message */
1940         read_next_command();
1941         msg = cmd_data(&msglen);
1942
1943         /* build the tag object */
1944         size_dbuf(&new_data, 67+strlen(t->name)+strlen(tagger)+msglen);
1945         sp = new_data.buffer;
1946         sp += sprintf(sp, "object %s\n", sha1_to_hex(sha1));
1947         sp += sprintf(sp, "type %s\n", commit_type);
1948         sp += sprintf(sp, "tag %s\n", t->name);
1949         sp += sprintf(sp, "tagger %s\n", tagger);
1950         *sp++ = '\n';
1951         memcpy(sp, msg, msglen);
1952         sp += msglen;
1953         free(tagger);
1954         free(msg);
1955
1956         if (store_object(OBJ_TAG, new_data.buffer,
1957                 sp - (char*)new_data.buffer,
1958                 NULL, t->sha1, 0))
1959                 t->pack_id = MAX_PACK_ID;
1960         else
1961                 t->pack_id = pack_id;
1962 }
1963
1964 static void cmd_reset_branch(void)
1965 {
1966         struct branch *b;
1967         char *sp;
1968
1969         /* Obtain the branch name from the rest of our command */
1970         sp = strchr(command_buf.buf, ' ') + 1;
1971         b = lookup_branch(sp);
1972         if (b) {
1973                 hashclr(b->sha1);
1974                 hashclr(b->branch_tree.versions[0].sha1);
1975                 hashclr(b->branch_tree.versions[1].sha1);
1976                 if (b->branch_tree.tree) {
1977                         release_tree_content_recursive(b->branch_tree.tree);
1978                         b->branch_tree.tree = NULL;
1979                 }
1980         }
1981         else
1982                 b = new_branch(sp);
1983         read_next_command();
1984         cmd_from(b);
1985 }
1986
1987 static void cmd_checkpoint(void)
1988 {
1989         if (object_count) {
1990                 cycle_packfile();
1991                 dump_branches();
1992                 dump_tags();
1993                 dump_marks();
1994         }
1995         read_next_command();
1996 }
1997
1998 static void import_marks(const char *input_file)
1999 {
2000         char line[512];
2001         FILE *f = fopen(input_file, "r");
2002         if (!f)
2003                 die("cannot read %s: %s", input_file, strerror(errno));
2004         while (fgets(line, sizeof(line), f)) {
2005                 uintmax_t mark;
2006                 char *end;
2007                 unsigned char sha1[20];
2008                 struct object_entry *e;
2009
2010                 end = strchr(line, '\n');
2011                 if (line[0] != ':' || !end)
2012                         die("corrupt mark line: %s", line);
2013                 *end = 0;
2014                 mark = strtoumax(line + 1, &end, 10);
2015                 if (!mark || end == line + 1
2016                         || *end != ' ' || get_sha1(end + 1, sha1))
2017                         die("corrupt mark line: %s", line);
2018                 e = find_object(sha1);
2019                 if (!e) {
2020                         enum object_type type = sha1_object_info(sha1, NULL);
2021                         if (type < 0)
2022                                 die("object not found: %s", sha1_to_hex(sha1));
2023                         e = insert_object(sha1);
2024                         e->type = type;
2025                         e->pack_id = MAX_PACK_ID;
2026                 }
2027                 insert_mark(mark, e);
2028         }
2029         fclose(f);
2030 }
2031
2032 static const char fast_import_usage[] =
2033 "git-fast-import [--date-format=f] [--max-pack-size=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file]";
2034
2035 int main(int argc, const char **argv)
2036 {
2037         int i, show_stats = 1;
2038
2039         git_config(git_default_config);
2040         alloc_objects(object_entry_alloc);
2041         strbuf_init(&command_buf);
2042         atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
2043         branch_table = xcalloc(branch_table_sz, sizeof(struct branch*));
2044         avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*));
2045         marks = pool_calloc(1, sizeof(struct mark_set));
2046
2047         for (i = 1; i < argc; i++) {
2048                 const char *a = argv[i];
2049
2050                 if (*a != '-' || !strcmp(a, "--"))
2051                         break;
2052                 else if (!prefixcmp(a, "--date-format=")) {
2053                         const char *fmt = a + 14;
2054                         if (!strcmp(fmt, "raw"))
2055                                 whenspec = WHENSPEC_RAW;
2056                         else if (!strcmp(fmt, "rfc2822"))
2057                                 whenspec = WHENSPEC_RFC2822;
2058                         else if (!strcmp(fmt, "now"))
2059                                 whenspec = WHENSPEC_NOW;
2060                         else
2061                                 die("unknown --date-format argument %s", fmt);
2062                 }
2063                 else if (!prefixcmp(a, "--max-pack-size="))
2064                         max_packsize = strtoumax(a + 16, NULL, 0) * 1024 * 1024;
2065                 else if (!prefixcmp(a, "--depth="))
2066                         max_depth = strtoul(a + 8, NULL, 0);
2067                 else if (!prefixcmp(a, "--active-branches="))
2068                         max_active_branches = strtoul(a + 18, NULL, 0);
2069                 else if (!prefixcmp(a, "--import-marks="))
2070                         import_marks(a + 15);
2071                 else if (!prefixcmp(a, "--export-marks="))
2072                         mark_file = a + 15;
2073                 else if (!prefixcmp(a, "--export-pack-edges=")) {
2074                         if (pack_edges)
2075                                 fclose(pack_edges);
2076                         pack_edges = fopen(a + 20, "a");
2077                         if (!pack_edges)
2078                                 die("Cannot open %s: %s", a + 20, strerror(errno));
2079                 } else if (!strcmp(a, "--force"))
2080                         force_update = 1;
2081                 else if (!strcmp(a, "--quiet"))
2082                         show_stats = 0;
2083                 else if (!strcmp(a, "--stats"))
2084                         show_stats = 1;
2085                 else
2086                         die("unknown option %s", a);
2087         }
2088         if (i != argc)
2089                 usage(fast_import_usage);
2090
2091         start_packfile();
2092         for (;;) {
2093                 read_next_command();
2094                 if (command_buf.eof)
2095                         break;
2096                 else if (!strcmp("blob", command_buf.buf))
2097                         cmd_new_blob();
2098                 else if (!prefixcmp(command_buf.buf, "commit "))
2099                         cmd_new_commit();
2100                 else if (!prefixcmp(command_buf.buf, "tag "))
2101                         cmd_new_tag();
2102                 else if (!prefixcmp(command_buf.buf, "reset "))
2103                         cmd_reset_branch();
2104                 else if (!strcmp("checkpoint", command_buf.buf))
2105                         cmd_checkpoint();
2106                 else
2107                         die("Unsupported command: %s", command_buf.buf);
2108         }
2109         end_packfile();
2110
2111         dump_branches();
2112         dump_tags();
2113         unkeep_all_packs();
2114         dump_marks();
2115
2116         if (pack_edges)
2117                 fclose(pack_edges);
2118
2119         if (show_stats) {
2120                 uintmax_t total_count = 0, duplicate_count = 0;
2121                 for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++)
2122                         total_count += object_count_by_type[i];
2123                 for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++)
2124                         duplicate_count += duplicate_count_by_type[i];
2125
2126                 fprintf(stderr, "%s statistics:\n", argv[0]);
2127                 fprintf(stderr, "---------------------------------------------------------------------\n");
2128                 fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
2129                 fprintf(stderr, "Total objects:   %10" PRIuMAX " (%10" PRIuMAX " duplicates                  )\n", total_count, duplicate_count);
2130                 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]);
2131                 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]);
2132                 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]);
2133                 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]);
2134                 fprintf(stderr, "Total branches:  %10lu (%10lu loads     )\n", branch_count, branch_load_count);
2135                 fprintf(stderr, "      marks:     %10" PRIuMAX " (%10" PRIuMAX " unique    )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
2136                 fprintf(stderr, "      atoms:     %10u\n", atom_cnt);
2137                 fprintf(stderr, "Memory total:    %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024);
2138                 fprintf(stderr, "       pools:    %10lu KiB\n", (unsigned long)(total_allocd/1024));
2139                 fprintf(stderr, "     objects:    %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
2140                 fprintf(stderr, "---------------------------------------------------------------------\n");
2141                 pack_report();
2142                 fprintf(stderr, "---------------------------------------------------------------------\n");
2143                 fprintf(stderr, "\n");
2144         }
2145
2146         return failure ? 1 : 0;
2147 }