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 int oecmp (const void *a_, const void *b_)
 655 {
 656         struct object_entry *a = *((struct object_entry**)a_);
 657         struct object_entry *b = *((struct object_entry**)b_);
 658         return hashcmp(a->sha1, b->sha1);
 659 }
 660
 661 static char *create_index(void)
 662 {
 663         static char tmpfile[PATH_MAX];
 664         SHA_CTX ctx;
 665         struct sha1file *f;
 666         struct object_entry **idx, **c, **last, *e;
 667         struct object_entry_pool *o;
 668         uint32_t array[256];
 669         int i, idx_fd;
 670
 671         /* Build the sorted table of object IDs. */
 672         idx = xmalloc(object_count * sizeof(struct object_entry*));
 673         c = idx;
 674         for (o = blocks; o; o = o->next_pool)
 675                 for (e = o->next_free; e-- != o->entries;)
 676                         if (pack_id == e->pack_id)
 677                                 *c++ = e;
 678         last = idx + object_count;
 679         if (c != last)
 680                 die("internal consistency error creating the index");
 681         qsort(idx, object_count, sizeof(struct object_entry*), oecmp);
 682
 683         /* Generate the fan-out array. */
 684         c = idx;
 685         for (i = 0; i < 256; i++) {
 686                 struct object_entry **next = c;;
 687                 while (next < last) {
 688                         if ((*next)->sha1[0] != i)
 689                                 break;
 690                         next++;
 691                 }
 692                 array[i] = htonl(next - idx);
 693                 c = next;
 694         }
 695
 696         snprintf(tmpfile, sizeof(tmpfile),
 697                 "%s/tmp_idx_XXXXXX", get_object_directory());
 698         idx_fd = mkstemp(tmpfile);
 699         if (idx_fd < 0)
 700                 die("Can't create %s: %s", tmpfile, strerror(errno));
 701         f = sha1fd(idx_fd, tmpfile);
 702         sha1write(f, array, 256 * sizeof(int));
 703         SHA1_Init(&ctx);
 704         for (c = idx; c != last; c++) {
 705                 uint32_t offset = htonl((*c)->offset);
 706                 sha1write(f, &offset, 4);
 707                 sha1write(f, (*c)->sha1, sizeof((*c)->sha1));
 708                 SHA1_Update(&ctx, (*c)->sha1, 20);
 709         }
 710         sha1write(f, pack_data->sha1, sizeof(pack_data->sha1));
 711         sha1close(f, NULL, 1);
 712         free(idx);
 713         SHA1_Final(pack_data->sha1, &ctx);
 714         return tmpfile;
 715 }
 716
 717 static char *keep_pack(char *curr_index_name)
 718 {
 719         static char name[PATH_MAX];
 720         static const char *keep_msg = "fast-import";
 721         int keep_fd;
 722
 723         chmod(pack_data->pack_name, 0444);
 724         chmod(curr_index_name, 0444);
 725
 726         snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
 727                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 728         keep_fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 729         if (keep_fd < 0)
 730                 die("cannot create keep file");
 731         write(keep_fd, keep_msg, strlen(keep_msg));
 732         close(keep_fd);
 733
 734         snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
 735                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 736         if (move_temp_to_file(pack_data->pack_name, name))
 737                 die("cannot store pack file");
 738
 739         snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
 740                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 741         if (move_temp_to_file(curr_index_name, name))
 742                 die("cannot store index file");
 743         return name;
 744 }
 745
 746 static void unkeep_all_packs(void)
 747 {
 748         static char name[PATH_MAX];
 749         int k;
 750
 751         for (k = 0; k < pack_id; k++) {
 752                 struct packed_git *p = all_packs[k];
 753                 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
 754                          get_object_directory(), sha1_to_hex(p->sha1));
 755                 unlink(name);
 756         }
 757 }
 758
 759 static void end_packfile(void)
 760 {
 761         struct packed_git *old_p = pack_data, *new_p;
 762
 763         if (object_count) {
 764                 char *idx_name;
 765                 int i;
 766                 struct branch *b;
 767                 struct tag *t;
 768
 769                 fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
 770                                     pack_data->pack_name, object_count);
 771                 close(pack_data->pack_fd);
 772                 idx_name = keep_pack(create_index());
 773
 774                 /* Register the packfile with core git's machinary. */
 775                 new_p = add_packed_git(idx_name, strlen(idx_name), 1);
 776                 if (!new_p)
 777                         die("core git rejected index %s", idx_name);
 778                 new_p->windows = old_p->windows;
 779                 all_packs[pack_id] = new_p;
 780                 install_packed_git(new_p);
 781
 782                 /* Print the boundary */
 783                 if (pack_edges) {
 784                         fprintf(pack_edges, "%s:", new_p->pack_name);
 785                         for (i = 0; i < branch_table_sz; i++) {
 786                                 for (b = branch_table[i]; b; b = b->table_next_branch) {
 787                                         if (b->pack_id == pack_id)
 788                                                 fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
 789                                 }
 790                         }
 791                         for (t = first_tag; t; t = t->next_tag) {
 792                                 if (t->pack_id == pack_id)
 793                                         fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
 794                         }
 795                         fputc('\n', pack_edges);
 796                         fflush(pack_edges);
 797                 }
 798
 799                 pack_id++;
 800         }
 801         else
 802                 unlink(old_p->pack_name);
 803         free(old_p);
 804
 805         /* We can't carry a delta across packfiles. */
 806         free(last_blob.data);
 807         last_blob.data = NULL;
 808         last_blob.len = 0;
 809         last_blob.offset = 0;
 810         last_blob.depth = 0;
 811 }
 812
 813 static void cycle_packfile(void)
 814 {
 815         end_packfile();
 816         start_packfile();
 817 }
 818
 819 static size_t encode_header(
 820         enum object_type type,
 821         size_t size,
 822         unsigned char *hdr)
 823 {
 824         int n = 1;
 825         unsigned char c;
 826
 827         if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
 828                 die("bad type %d", type);
 829
 830         c = (type << 4) | (size & 15);
 831         size >>= 4;
 832         while (size) {
 833                 *hdr++ = c | 0x80;
 834                 c = size & 0x7f;
 835                 size >>= 7;
 836                 n++;
 837         }
 838         *hdr = c;
 839         return n;
 840 }
 841
 842 static int store_object(
 843         enum object_type type,
 844         void *dat,
 845         size_t datlen,
 846         struct last_object *last,
 847         unsigned char *sha1out,
 848         uintmax_t mark)
 849 {
 850         void *out, *delta;
 851         struct object_entry *e;
 852         unsigned char hdr[96];
 853         unsigned char sha1[20];
 854         unsigned long hdrlen, deltalen;
 855         SHA_CTX c;
 856         z_stream s;
 857
 858         hdrlen = sprintf((char*)hdr,"%s %lu", typename(type),
 859                 (unsigned long)datlen) + 1;
 860         SHA1_Init(&c);
 861         SHA1_Update(&c, hdr, hdrlen);
 862         SHA1_Update(&c, dat, datlen);
 863         SHA1_Final(sha1, &c);
 864         if (sha1out)
 865                 hashcpy(sha1out, sha1);
 866
 867         e = insert_object(sha1);
 868         if (mark)
 869                 insert_mark(mark, e);
 870         if (e->offset) {
 871                 duplicate_count_by_type[type]++;
 872                 return 1;
 873         } else if (find_sha1_pack(sha1, packed_git)) {
 874                 e->type = type;
 875                 e->pack_id = MAX_PACK_ID;
 876                 e->offset = 1; /* just not zero! */
 877                 duplicate_count_by_type[type]++;
 878                 return 1;
 879         }
 880
 881         if (last && last->data && last->depth < max_depth) {
 882                 delta = diff_delta(last->data, last->len,
 883                         dat, datlen,
 884                         &deltalen, 0);
 885                 if (delta && deltalen >= datlen) {
 886                         free(delta);
 887                         delta = NULL;
 888                 }
 889         } else
 890                 delta = NULL;
 891
 892         memset(&s, 0, sizeof(s));
 893         deflateInit(&s, zlib_compression_level);
 894         if (delta) {
 895                 s.next_in = delta;
 896                 s.avail_in = deltalen;
 897         } else {
 898                 s.next_in = dat;
 899                 s.avail_in = datlen;
 900         }
 901         s.avail_out = deflateBound(&s, s.avail_in);
 902         s.next_out = out = xmalloc(s.avail_out);
 903         while (deflate(&s, Z_FINISH) == Z_OK)
 904                 /* nothing */;
 905         deflateEnd(&s);
 906
 907         /* Determine if we should auto-checkpoint. */
 908         if ((pack_size + 60 + s.total_out) > max_packsize
 909                 || (pack_size + 60 + s.total_out) < pack_size) {
 910
 911                 /* This new object needs to *not* have the current pack_id. */
 912                 e->pack_id = pack_id + 1;
 913                 cycle_packfile();
 914
 915                 /* We cannot carry a delta into the new pack. */
 916                 if (delta) {
 917                         free(delta);
 918                         delta = NULL;
 919
 920                         memset(&s, 0, sizeof(s));
 921                         deflateInit(&s, zlib_compression_level);
 922                         s.next_in = dat;
 923                         s.avail_in = datlen;
 924                         s.avail_out = deflateBound(&s, s.avail_in);
 925                         s.next_out = out = xrealloc(out, s.avail_out);
 926                         while (deflate(&s, Z_FINISH) == Z_OK)
 927                                 /* nothing */;
 928                         deflateEnd(&s);
 929                 }
 930         }
 931
 932         e->type = type;
 933         e->pack_id = pack_id;
 934         e->offset = pack_size;
 935         object_count++;
 936         object_count_by_type[type]++;
 937
 938         if (delta) {
 939                 unsigned long ofs = e->offset - last->offset;
 940                 unsigned pos = sizeof(hdr) - 1;
 941
 942                 delta_count_by_type[type]++;
 943                 last->depth++;
 944
 945                 hdrlen = encode_header(OBJ_OFS_DELTA, deltalen, hdr);
 946                 write_or_die(pack_data->pack_fd, hdr, hdrlen);
 947                 pack_size += hdrlen;
 948
 949                 hdr[pos] = ofs & 127;
 950                 while (ofs >>= 7)
 951                         hdr[--pos] = 128 | (--ofs & 127);
 952                 write_or_die(pack_data->pack_fd, hdr + pos, sizeof(hdr) - pos);
 953                 pack_size += sizeof(hdr) - pos;
 954         } else {
 955                 if (last)
 956                         last->depth = 0;
 957                 hdrlen = encode_header(type, datlen, hdr);
 958                 write_or_die(pack_data->pack_fd, hdr, hdrlen);
 959                 pack_size += hdrlen;
 960         }
 961
 962         write_or_die(pack_data->pack_fd, out, s.total_out);
 963         pack_size += s.total_out;
 964
 965         free(out);
 966         free(delta);
 967         if (last) {
 968                 if (!last->no_free)
 969                         free(last->data);
 970                 last->data = dat;
 971                 last->offset = e->offset;
 972                 last->len = datlen;
 973         }
 974         return 0;
 975 }
 976
 977 static void *gfi_unpack_entry(
 978         struct object_entry *oe,
 979         unsigned long *sizep)
 980 {
 981         enum object_type type;
 982         struct packed_git *p = all_packs[oe->pack_id];
 983         if (p == pack_data)
 984                 p->pack_size = pack_size + 20;
 985         return unpack_entry(p, oe->offset, &type, sizep);
 986 }
 987
 988 static const char *get_mode(const char *str, uint16_t *modep)
 989 {
 990         unsigned char c;
 991         uint16_t mode = 0;
 992
 993         while ((c = *str++) != ' ') {
 994                 if (c < '0' || c > '7')
 995                         return NULL;
 996                 mode = (mode << 3) + (c - '0');
 997         }
 998         *modep = mode;
 999         return str;
1000 }
1001
1002 static void load_tree(struct tree_entry *root)
1003 {
1004         unsigned char* sha1 = root->versions[1].sha1;
1005         struct object_entry *myoe;
1006         struct tree_content *t;
1007         unsigned long size;
1008         char *buf;
1009         const char *c;
1010
1011         root->tree = t = new_tree_content(8);
1012         if (is_null_sha1(sha1))
1013                 return;
1014
1015         myoe = find_object(sha1);
1016         if (myoe) {
1017                 if (myoe->type != OBJ_TREE)
1018                         die("Not a tree: %s", sha1_to_hex(sha1));
1019                 t->delta_depth = 0;
1020                 buf = gfi_unpack_entry(myoe, &size);
1021         } else {
1022                 enum object_type type;
1023                 buf = read_sha1_file(sha1, &type, &size);
1024                 if (!buf || type != OBJ_TREE)
1025                         die("Can't load tree %s", sha1_to_hex(sha1));
1026         }
1027
1028         c = buf;
1029         while (c != (buf + size)) {
1030                 struct tree_entry *e = new_tree_entry();
1031
1032                 if (t->entry_count == t->entry_capacity)
1033                         root->tree = t = grow_tree_content(t, t->entry_count);
1034                 t->entries[t->entry_count++] = e;
1035
1036                 e->tree = NULL;
1037                 c = get_mode(c, &e->versions[1].mode);
1038                 if (!c)
1039                         die("Corrupt mode in %s", sha1_to_hex(sha1));
1040                 e->versions[0].mode = e->versions[1].mode;
1041                 e->name = to_atom(c, strlen(c));
1042                 c += e->name->str_len + 1;
1043                 hashcpy(e->versions[0].sha1, (unsigned char*)c);
1044                 hashcpy(e->versions[1].sha1, (unsigned char*)c);
1045                 c += 20;
1046         }
1047         free(buf);
1048 }
1049
1050 static int tecmp0 (const void *_a, const void *_b)
1051 {
1052         struct tree_entry *a = *((struct tree_entry**)_a);
1053         struct tree_entry *b = *((struct tree_entry**)_b);
1054         return base_name_compare(
1055                 a->name->str_dat, a->name->str_len, a->versions[0].mode,
1056                 b->name->str_dat, b->name->str_len, b->versions[0].mode);
1057 }
1058
1059 static int tecmp1 (const void *_a, const void *_b)
1060 {
1061         struct tree_entry *a = *((struct tree_entry**)_a);
1062         struct tree_entry *b = *((struct tree_entry**)_b);
1063         return base_name_compare(
1064                 a->name->str_dat, a->name->str_len, a->versions[1].mode,
1065                 b->name->str_dat, b->name->str_len, b->versions[1].mode);
1066 }
1067
1068 static void mktree(struct tree_content *t,
1069         int v,
1070         unsigned long *szp,
1071         struct dbuf *b)
1072 {
1073         size_t maxlen = 0;
1074         unsigned int i;
1075         char *c;
1076
1077         if (!v)
1078                 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0);
1079         else
1080                 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1);
1081
1082         for (i = 0; i < t->entry_count; i++) {
1083                 if (t->entries[i]->versions[v].mode)
1084                         maxlen += t->entries[i]->name->str_len + 34;
1085         }
1086
1087         size_dbuf(b, maxlen);
1088         c = b->buffer;
1089         for (i = 0; i < t->entry_count; i++) {
1090                 struct tree_entry *e = t->entries[i];
1091                 if (!e->versions[v].mode)
1092                         continue;
1093                 c += sprintf(c, "%o", (unsigned int)e->versions[v].mode);
1094                 *c++ = ' ';
1095                 strcpy(c, e->name->str_dat);
1096                 c += e->name->str_len + 1;
1097                 hashcpy((unsigned char*)c, e->versions[v].sha1);
1098                 c += 20;
1099         }
1100         *szp = c - (char*)b->buffer;
1101 }
1102
1103 static void store_tree(struct tree_entry *root)
1104 {
1105         struct tree_content *t = root->tree;
1106         unsigned int i, j, del;
1107         unsigned long new_len;
1108         struct last_object lo;
1109         struct object_entry *le;
1110
1111         if (!is_null_sha1(root->versions[1].sha1))
1112                 return;
1113
1114         for (i = 0; i < t->entry_count; i++) {
1115                 if (t->entries[i]->tree)
1116                         store_tree(t->entries[i]);
1117         }
1118
1119         le = find_object(root->versions[0].sha1);
1120         if (!S_ISDIR(root->versions[0].mode)
1121                 || !le
1122                 || le->pack_id != pack_id) {
1123                 lo.data = NULL;
1124                 lo.depth = 0;
1125         } else {
1126                 mktree(t, 0, &lo.len, &old_tree);
1127                 lo.data = old_tree.buffer;
1128                 lo.offset = le->offset;
1129                 lo.depth = t->delta_depth;
1130                 lo.no_free = 1;
1131         }
1132
1133         mktree(t, 1, &new_len, &new_tree);
1134         store_object(OBJ_TREE, new_tree.buffer, new_len,
1135                 &lo, root->versions[1].sha1, 0);
1136
1137         t->delta_depth = lo.depth;
1138         for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
1139                 struct tree_entry *e = t->entries[i];
1140                 if (e->versions[1].mode) {
1141                         e->versions[0].mode = e->versions[1].mode;
1142                         hashcpy(e->versions[0].sha1, e->versions[1].sha1);
1143                         t->entries[j++] = e;
1144                 } else {
1145                         release_tree_entry(e);
1146                         del++;
1147                 }
1148         }
1149         t->entry_count -= del;
1150 }
1151
1152 static int tree_content_set(
1153         struct tree_entry *root,
1154         const char *p,
1155         const unsigned char *sha1,
1156         const uint16_t mode)
1157 {
1158         struct tree_content *t = root->tree;
1159         const char *slash1;
1160         unsigned int i, n;
1161         struct tree_entry *e;
1162
1163         slash1 = strchr(p, '/');
1164         if (slash1)
1165                 n = slash1 - p;
1166         else
1167                 n = strlen(p);
1168         if (!n)
1169                 die("Empty path component found in input");
1170
1171         for (i = 0; i < t->entry_count; i++) {
1172                 e = t->entries[i];
1173                 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1174                         if (!slash1) {
1175                                 if (e->versions[1].mode == mode
1176                                                 && !hashcmp(e->versions[1].sha1, sha1))
1177                                         return 0;
1178                                 e->versions[1].mode = mode;
1179                                 hashcpy(e->versions[1].sha1, sha1);
1180                                 if (e->tree) {
1181                                         release_tree_content_recursive(e->tree);
1182                                         e->tree = NULL;
1183                                 }
1184                                 hashclr(root->versions[1].sha1);
1185                                 return 1;
1186                         }
1187                         if (!S_ISDIR(e->versions[1].mode)) {
1188                                 e->tree = new_tree_content(8);
1189                                 e->versions[1].mode = S_IFDIR;
1190                         }
1191                         if (!e->tree)
1192                                 load_tree(e);
1193                         if (tree_content_set(e, slash1 + 1, sha1, mode)) {
1194                                 hashclr(root->versions[1].sha1);
1195                                 return 1;
1196                         }
1197                         return 0;
1198                 }
1199         }
1200
1201         if (t->entry_count == t->entry_capacity)
1202                 root->tree = t = grow_tree_content(t, t->entry_count);
1203         e = new_tree_entry();
1204         e->name = to_atom(p, n);
1205         e->versions[0].mode = 0;
1206         hashclr(e->versions[0].sha1);
1207         t->entries[t->entry_count++] = e;
1208         if (slash1) {
1209                 e->tree = new_tree_content(8);
1210                 e->versions[1].mode = S_IFDIR;
1211                 tree_content_set(e, slash1 + 1, sha1, mode);
1212         } else {
1213                 e->tree = NULL;
1214                 e->versions[1].mode = mode;
1215                 hashcpy(e->versions[1].sha1, sha1);
1216         }
1217         hashclr(root->versions[1].sha1);
1218         return 1;
1219 }
1220
1221 static int tree_content_remove(struct tree_entry *root, const char *p)
1222 {
1223         struct tree_content *t = root->tree;
1224         const char *slash1;
1225         unsigned int i, n;
1226         struct tree_entry *e;
1227
1228         slash1 = strchr(p, '/');
1229         if (slash1)
1230                 n = slash1 - p;
1231         else
1232                 n = strlen(p);
1233
1234         for (i = 0; i < t->entry_count; i++) {
1235                 e = t->entries[i];
1236                 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1237                         if (!slash1 || !S_ISDIR(e->versions[1].mode))
1238                                 goto del_entry;
1239                         if (!e->tree)
1240                                 load_tree(e);
1241                         if (tree_content_remove(e, slash1 + 1)) {
1242                                 for (n = 0; n < e->tree->entry_count; n++) {
1243                                         if (e->tree->entries[n]->versions[1].mode) {
1244                                                 hashclr(root->versions[1].sha1);
1245                                                 return 1;
1246                                         }
1247                                 }
1248                                 goto del_entry;
1249                         }
1250                         return 0;
1251                 }
1252         }
1253         return 0;
1254
1255 del_entry:
1256         if (e->tree) {
1257                 release_tree_content_recursive(e->tree);
1258                 e->tree = NULL;
1259         }
1260         e->versions[1].mode = 0;
1261         hashclr(e->versions[1].sha1);
1262         hashclr(root->versions[1].sha1);
1263         return 1;
1264 }
1265
1266 static int update_branch(struct branch *b)
1267 {
1268         static const char *msg = "fast-import";
1269         struct ref_lock *lock;
1270         unsigned char old_sha1[20];
1271
1272         if (read_ref(b->name, old_sha1))
1273                 hashclr(old_sha1);
1274         lock = lock_any_ref_for_update(b->name, old_sha1);
1275         if (!lock)
1276                 return error("Unable to lock %s", b->name);
1277         if (!force_update && !is_null_sha1(old_sha1)) {
1278                 struct commit *old_cmit, *new_cmit;
1279
1280                 old_cmit = lookup_commit_reference_gently(old_sha1, 0);
1281                 new_cmit = lookup_commit_reference_gently(b->sha1, 0);
1282                 if (!old_cmit || !new_cmit) {
1283                         unlock_ref(lock);
1284                         return error("Branch %s is missing commits.", b->name);
1285                 }
1286
1287                 if (!in_merge_bases(old_cmit, &new_cmit, 1)) {
1288                         unlock_ref(lock);
1289                         warning("Not updating %s"
1290                                 " (new tip %s does not contain %s)",
1291                                 b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
1292                         return -1;
1293                 }
1294         }
1295         if (write_ref_sha1(lock, b->sha1, msg) < 0)
1296                 return error("Unable to update %s", b->name);
1297         return 0;
1298 }
1299
1300 static void dump_branches(void)
1301 {
1302         unsigned int i;
1303         struct branch *b;
1304
1305         for (i = 0; i < branch_table_sz; i++) {
1306                 for (b = branch_table[i]; b; b = b->table_next_branch)
1307                         failure |= update_branch(b);
1308         }
1309 }
1310
1311 static void dump_tags(void)
1312 {
1313         static const char *msg = "fast-import";
1314         struct tag *t;
1315         struct ref_lock *lock;
1316         char ref_name[PATH_MAX];
1317
1318         for (t = first_tag; t; t = t->next_tag) {
1319                 sprintf(ref_name, "tags/%s", t->name);
1320                 lock = lock_ref_sha1(ref_name, NULL);
1321                 if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0)
1322                         failure |= error("Unable to update %s", ref_name);
1323         }
1324 }
1325
1326 static void dump_marks_helper(FILE *f,
1327         uintmax_t base,
1328         struct mark_set *m)
1329 {
1330         uintmax_t k;
1331         if (m->shift) {
1332                 for (k = 0; k < 1024; k++) {
1333                         if (m->data.sets[k])
1334                                 dump_marks_helper(f, (base + k) << m->shift,
1335                                         m->data.sets[k]);
1336                 }
1337         } else {
1338                 for (k = 0; k < 1024; k++) {
1339                         if (m->data.marked[k])
1340                                 fprintf(f, ":%" PRIuMAX " %s\n", base + k,
1341                                         sha1_to_hex(m->data.marked[k]->sha1));
1342                 }
1343         }
1344 }
1345
1346 static void dump_marks(void)
1347 {
1348         static struct lock_file mark_lock;
1349         int mark_fd;
1350         FILE *f;
1351
1352         if (!mark_file)
1353                 return;
1354
1355         mark_fd = hold_lock_file_for_update(&mark_lock, mark_file, 0);
1356         if (mark_fd < 0) {
1357                 failure |= error("Unable to write marks file %s: %s",
1358                         mark_file, strerror(errno));
1359                 return;
1360         }
1361
1362         f = fdopen(mark_fd, "w");
1363         if (!f) {
1364                 rollback_lock_file(&mark_lock);
1365                 failure |= error("Unable to write marks file %s: %s",
1366                         mark_file, strerror(errno));
1367                 return;
1368         }
1369
1370         dump_marks_helper(f, 0, marks);
1371         fclose(f);
1372         if (commit_lock_file(&mark_lock))
1373                 failure |= error("Unable to write marks file %s: %s",
1374                         mark_file, strerror(errno));
1375 }
1376
1377 static void read_next_command(void)
1378 {
1379         read_line(&command_buf, stdin, '\n');
1380 }
1381
1382 static void cmd_mark(void)
1383 {
1384         if (!prefixcmp(command_buf.buf, "mark :")) {
1385                 next_mark = strtoumax(command_buf.buf + 6, NULL, 10);
1386                 read_next_command();
1387         }
1388         else
1389                 next_mark = 0;
1390 }
1391
1392 static void *cmd_data (size_t *size)
1393 {
1394         size_t length;
1395         char *buffer;
1396
1397         if (prefixcmp(command_buf.buf, "data "))
1398                 die("Expected 'data n' command, found: %s", command_buf.buf);
1399
1400         if (!prefixcmp(command_buf.buf + 5, "<<")) {
1401                 char *term = xstrdup(command_buf.buf + 5 + 2);
1402                 size_t sz = 8192, term_len = command_buf.len - 5 - 2;
1403                 length = 0;
1404                 buffer = xmalloc(sz);
1405                 for (;;) {
1406                         read_next_command();
1407                         if (command_buf.eof)
1408                                 die("EOF in data (terminator '%s' not found)", term);
1409                         if (term_len == command_buf.len
1410                                 && !strcmp(term, command_buf.buf))
1411                                 break;
1412                         if (sz < (length + command_buf.len)) {
1413                                 sz = sz * 3 / 2 + 16;
1414                                 if (sz < (length + command_buf.len))
1415                                         sz = length + command_buf.len;
1416                                 buffer = xrealloc(buffer, sz);
1417                         }
1418                         memcpy(buffer + length,
1419                                 command_buf.buf,
1420                                 command_buf.len - 1);
1421                         length += command_buf.len - 1;
1422                         buffer[length++] = '\n';
1423                 }
1424                 free(term);
1425         }
1426         else {
1427                 size_t n = 0;
1428                 length = strtoul(command_buf.buf + 5, NULL, 10);
1429                 buffer = xmalloc(length);
1430                 while (n < length) {
1431                         size_t s = fread(buffer + n, 1, length - n, stdin);
1432                         if (!s && feof(stdin))
1433                                 die("EOF in data (%lu bytes remaining)",
1434                                         (unsigned long)(length - n));
1435                         n += s;
1436                 }
1437         }
1438
1439         if (fgetc(stdin) != '\n')
1440                 die("An lf did not trail the binary data as expected.");
1441
1442         *size = length;
1443         return buffer;
1444 }
1445
1446 static int validate_raw_date(const char *src, char *result, int maxlen)
1447 {
1448         const char *orig_src = src;
1449         char *endp, sign;
1450
1451         strtoul(src, &endp, 10);
1452         if (endp == src || *endp != ' ')
1453                 return -1;
1454
1455         src = endp + 1;
1456         if (*src != '-' && *src != '+')
1457                 return -1;
1458         sign = *src;
1459
1460         strtoul(src + 1, &endp, 10);
1461         if (endp == src || *endp || (endp - orig_src) >= maxlen)
1462                 return -1;
1463
1464         strcpy(result, orig_src);
1465         return 0;
1466 }
1467
1468 static char *parse_ident(const char *buf)
1469 {
1470         const char *gt;
1471         size_t name_len;
1472         char *ident;
1473
1474         gt = strrchr(buf, '>');
1475         if (!gt)
1476                 die("Missing > in ident string: %s", buf);
1477         gt++;
1478         if (*gt != ' ')
1479                 die("Missing space after > in ident string: %s", buf);
1480         gt++;
1481         name_len = gt - buf;
1482         ident = xmalloc(name_len + 24);
1483         strncpy(ident, buf, name_len);
1484
1485         switch (whenspec) {
1486         case WHENSPEC_RAW:
1487                 if (validate_raw_date(gt, ident + name_len, 24) < 0)
1488                         die("Invalid raw date \"%s\" in ident: %s", gt, buf);
1489                 break;
1490         case WHENSPEC_RFC2822:
1491                 if (parse_date(gt, ident + name_len, 24) < 0)
1492                         die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf);
1493                 break;
1494         case WHENSPEC_NOW:
1495                 if (strcmp("now", gt))
1496                         die("Date in ident must be 'now': %s", buf);
1497                 datestamp(ident + name_len, 24);
1498                 break;
1499         }
1500
1501         return ident;
1502 }
1503
1504 static void cmd_new_blob(void)
1505 {
1506         size_t l;
1507         void *d;
1508
1509         read_next_command();
1510         cmd_mark();
1511         d = cmd_data(&l);
1512
1513         if (store_object(OBJ_BLOB, d, l, &last_blob, NULL, next_mark))
1514                 free(d);
1515 }
1516
1517 static void unload_one_branch(void)
1518 {
1519         while (cur_active_branches
1520                 && cur_active_branches >= max_active_branches) {
1521                 uintmax_t min_commit = ULONG_MAX;
1522                 struct branch *e, *l = NULL, *p = NULL;
1523
1524                 for (e = active_branches; e; e = e->active_next_branch) {
1525                         if (e->last_commit < min_commit) {
1526                                 p = l;
1527                                 min_commit = e->last_commit;
1528                         }
1529                         l = e;
1530                 }
1531
1532                 if (p) {
1533                         e = p->active_next_branch;
1534                         p->active_next_branch = e->active_next_branch;
1535                 } else {
1536                         e = active_branches;
1537                         active_branches = e->active_next_branch;
1538                 }
1539                 e->active = 0;
1540                 e->active_next_branch = NULL;
1541                 if (e->branch_tree.tree) {
1542                         release_tree_content_recursive(e->branch_tree.tree);
1543                         e->branch_tree.tree = NULL;
1544                 }
1545                 cur_active_branches--;
1546         }
1547 }
1548
1549 static void load_branch(struct branch *b)
1550 {
1551         load_tree(&b->branch_tree);
1552         if (!b->active) {
1553                 b->active = 1;
1554                 b->active_next_branch = active_branches;
1555                 active_branches = b;
1556                 cur_active_branches++;
1557                 branch_load_count++;
1558         }
1559 }
1560
1561 static void file_change_m(struct branch *b)
1562 {
1563         const char *p = command_buf.buf + 2;
1564         char *p_uq;
1565         const char *endp;
1566         struct object_entry *oe = oe;
1567         unsigned char sha1[20];
1568         uint16_t mode, inline_data = 0;
1569
1570         p = get_mode(p, &mode);
1571         if (!p)
1572                 die("Corrupt mode: %s", command_buf.buf);
1573         switch (mode) {
1574         case S_IFREG | 0644:
1575         case S_IFREG | 0755:
1576         case S_IFLNK:
1577         case 0644:
1578         case 0755:
1579                 /* ok */
1580                 break;
1581         default:
1582                 die("Corrupt mode: %s", command_buf.buf);
1583         }
1584
1585         if (*p == ':') {
1586                 char *x;
1587                 oe = find_mark(strtoumax(p + 1, &x, 10));
1588                 hashcpy(sha1, oe->sha1);
1589                 p = x;
1590         } else if (!prefixcmp(p, "inline")) {
1591                 inline_data = 1;
1592                 p += 6;
1593         } else {
1594                 if (get_sha1_hex(p, sha1))
1595                         die("Invalid SHA1: %s", command_buf.buf);
1596                 oe = find_object(sha1);
1597                 p += 40;
1598         }
1599         if (*p++ != ' ')
1600                 die("Missing space after SHA1: %s", command_buf.buf);
1601
1602         p_uq = unquote_c_style(p, &endp);
1603         if (p_uq) {
1604                 if (*endp)
1605                         die("Garbage after path in: %s", command_buf.buf);
1606                 p = p_uq;
1607         }
1608
1609         if (inline_data) {
1610                 size_t l;
1611                 void *d;
1612                 if (!p_uq)
1613                         p = p_uq = xstrdup(p);
1614                 read_next_command();
1615                 d = cmd_data(&l);
1616                 if (store_object(OBJ_BLOB, d, l, &last_blob, sha1, 0))
1617                         free(d);
1618         } else if (oe) {
1619                 if (oe->type != OBJ_BLOB)
1620                         die("Not a blob (actually a %s): %s",
1621                                 command_buf.buf, typename(oe->type));
1622         } else {
1623                 enum object_type type = sha1_object_info(sha1, NULL);
1624                 if (type < 0)
1625                         die("Blob not found: %s", command_buf.buf);
1626                 if (type != OBJ_BLOB)
1627                         die("Not a blob (actually a %s): %s",
1628                             typename(type), command_buf.buf);
1629         }
1630
1631         tree_content_set(&b->branch_tree, p, sha1, S_IFREG | mode);
1632         free(p_uq);
1633 }
1634
1635 static void file_change_d(struct branch *b)
1636 {
1637         const char *p = command_buf.buf + 2;
1638         char *p_uq;
1639         const char *endp;
1640
1641         p_uq = unquote_c_style(p, &endp);
1642         if (p_uq) {
1643                 if (*endp)
1644                         die("Garbage after path in: %s", command_buf.buf);
1645                 p = p_uq;
1646         }
1647         tree_content_remove(&b->branch_tree, p);
1648         free(p_uq);
1649 }
1650
1651 static void file_change_deleteall(struct branch *b)
1652 {
1653         release_tree_content_recursive(b->branch_tree.tree);
1654         hashclr(b->branch_tree.versions[0].sha1);
1655         hashclr(b->branch_tree.versions[1].sha1);
1656         load_tree(&b->branch_tree);
1657 }
1658
1659 static void cmd_from(struct branch *b)
1660 {
1661         const char *from;
1662         struct branch *s;
1663
1664         if (prefixcmp(command_buf.buf, "from "))
1665                 return;
1666
1667         if (b->branch_tree.tree) {
1668                 release_tree_content_recursive(b->branch_tree.tree);
1669                 b->branch_tree.tree = NULL;
1670         }
1671
1672         from = strchr(command_buf.buf, ' ') + 1;
1673         s = lookup_branch(from);
1674         if (b == s)
1675                 die("Can't create a branch from itself: %s", b->name);
1676         else if (s) {
1677                 unsigned char *t = s->branch_tree.versions[1].sha1;
1678                 hashcpy(b->sha1, s->sha1);
1679                 hashcpy(b->branch_tree.versions[0].sha1, t);
1680                 hashcpy(b->branch_tree.versions[1].sha1, t);
1681         } else if (*from == ':') {
1682                 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1683                 struct object_entry *oe = find_mark(idnum);
1684                 unsigned long size;
1685                 char *buf;
1686                 if (oe->type != OBJ_COMMIT)
1687                         die("Mark :%" PRIuMAX " not a commit", idnum);
1688                 hashcpy(b->sha1, oe->sha1);
1689                 buf = gfi_unpack_entry(oe, &size);
1690                 if (!buf || size < 46)
1691                         die("Not a valid commit: %s", from);
1692                 if (memcmp("tree ", buf, 5)
1693                         || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
1694                         die("The commit %s is corrupt", sha1_to_hex(b->sha1));
1695                 free(buf);
1696                 hashcpy(b->branch_tree.versions[0].sha1,
1697                         b->branch_tree.versions[1].sha1);
1698         } else if (!get_sha1(from, b->sha1)) {
1699                 if (is_null_sha1(b->sha1)) {
1700                         hashclr(b->branch_tree.versions[0].sha1);
1701                         hashclr(b->branch_tree.versions[1].sha1);
1702                 } else {
1703                         unsigned long size;
1704                         char *buf;
1705
1706                         buf = read_object_with_reference(b->sha1,
1707                                 commit_type, &size, b->sha1);
1708                         if (!buf || size < 46)
1709                                 die("Not a valid commit: %s", from);
1710                         if (memcmp("tree ", buf, 5)
1711                                 || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
1712                                 die("The commit %s is corrupt", sha1_to_hex(b->sha1));
1713                         free(buf);
1714                         hashcpy(b->branch_tree.versions[0].sha1,
1715                                 b->branch_tree.versions[1].sha1);
1716                 }
1717         } else
1718                 die("Invalid ref name or SHA1 expression: %s", from);
1719
1720         read_next_command();
1721 }
1722
1723 static struct hash_list *cmd_merge(unsigned int *count)
1724 {
1725         struct hash_list *list = NULL, *n, *e = e;
1726         const char *from;
1727         struct branch *s;
1728
1729         *count = 0;
1730         while (!prefixcmp(command_buf.buf, "merge ")) {
1731                 from = strchr(command_buf.buf, ' ') + 1;
1732                 n = xmalloc(sizeof(*n));
1733                 s = lookup_branch(from);
1734                 if (s)
1735                         hashcpy(n->sha1, s->sha1);
1736                 else if (*from == ':') {
1737                         uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1738                         struct object_entry *oe = find_mark(idnum);
1739                         if (oe->type != OBJ_COMMIT)
1740                                 die("Mark :%" PRIuMAX " not a commit", idnum);
1741                         hashcpy(n->sha1, oe->sha1);
1742                 } else if (!get_sha1(from, n->sha1)) {
1743                         unsigned long size;
1744                         char *buf = read_object_with_reference(n->sha1,
1745                                 commit_type, &size, n->sha1);
1746                         if (!buf || size < 46)
1747                                 die("Not a valid commit: %s", from);
1748                         free(buf);
1749                 } else
1750                         die("Invalid ref name or SHA1 expression: %s", from);
1751
1752                 n->next = NULL;
1753                 if (list)
1754                         e->next = n;
1755                 else
1756                         list = n;
1757                 e = n;
1758                 (*count)++;
1759                 read_next_command();
1760         }
1761         return list;
1762 }
1763
1764 static void cmd_new_commit(void)
1765 {
1766         struct branch *b;
1767         void *msg;
1768         size_t msglen;
1769         char *sp;
1770         char *author = NULL;
1771         char *committer = NULL;
1772         struct hash_list *merge_list = NULL;
1773         unsigned int merge_count;
1774
1775         /* Obtain the branch name from the rest of our command */
1776         sp = strchr(command_buf.buf, ' ') + 1;
1777         b = lookup_branch(sp);
1778         if (!b)
1779                 b = new_branch(sp);
1780
1781         read_next_command();
1782         cmd_mark();
1783         if (!prefixcmp(command_buf.buf, "author ")) {
1784                 author = parse_ident(command_buf.buf + 7);
1785                 read_next_command();
1786         }
1787         if (!prefixcmp(command_buf.buf, "committer ")) {
1788                 committer = parse_ident(command_buf.buf + 10);
1789                 read_next_command();
1790         }
1791         if (!committer)
1792                 die("Expected committer but didn't get one");
1793         msg = cmd_data(&msglen);
1794         read_next_command();
1795         cmd_from(b);
1796         merge_list = cmd_merge(&merge_count);
1797
1798         /* ensure the branch is active/loaded */
1799         if (!b->branch_tree.tree || !max_active_branches) {
1800                 unload_one_branch();
1801                 load_branch(b);
1802         }
1803
1804         /* file_change* */
1805         for (;;) {
1806                 if (1 == command_buf.len)
1807                         break;
1808                 else if (!prefixcmp(command_buf.buf, "M "))
1809                         file_change_m(b);
1810                 else if (!prefixcmp(command_buf.buf, "D "))
1811                         file_change_d(b);
1812                 else if (!strcmp("deleteall", command_buf.buf))
1813                         file_change_deleteall(b);
1814                 else
1815                         die("Unsupported file_change: %s", command_buf.buf);
1816                 read_next_command();
1817         }
1818
1819         /* build the tree and the commit */
1820         store_tree(&b->branch_tree);
1821         hashcpy(b->branch_tree.versions[0].sha1,
1822                 b->branch_tree.versions[1].sha1);
1823         size_dbuf(&new_data, 114 + msglen
1824                 + merge_count * 49
1825                 + (author
1826                         ? strlen(author) + strlen(committer)
1827                         : 2 * strlen(committer)));
1828         sp = new_data.buffer;
1829         sp += sprintf(sp, "tree %s\n",
1830                 sha1_to_hex(b->branch_tree.versions[1].sha1));
1831         if (!is_null_sha1(b->sha1))
1832                 sp += sprintf(sp, "parent %s\n", sha1_to_hex(b->sha1));
1833         while (merge_list) {
1834                 struct hash_list *next = merge_list->next;
1835                 sp += sprintf(sp, "parent %s\n", sha1_to_hex(merge_list->sha1));
1836                 free(merge_list);
1837                 merge_list = next;
1838         }
1839         sp += sprintf(sp, "author %s\n", author ? author : committer);
1840         sp += sprintf(sp, "committer %s\n", committer);
1841         *sp++ = '\n';
1842         memcpy(sp, msg, msglen);
1843         sp += msglen;
1844         free(author);
1845         free(committer);
1846         free(msg);
1847
1848         if (!store_object(OBJ_COMMIT,
1849                 new_data.buffer, sp - (char*)new_data.buffer,
1850                 NULL, b->sha1, next_mark))
1851                 b->pack_id = pack_id;
1852         b->last_commit = object_count_by_type[OBJ_COMMIT];
1853 }
1854
1855 static void cmd_new_tag(void)
1856 {
1857         char *sp;
1858         const char *from;
1859         char *tagger;
1860         struct branch *s;
1861         void *msg;
1862         size_t msglen;
1863         struct tag *t;
1864         uintmax_t from_mark = 0;
1865         unsigned char sha1[20];
1866
1867         /* Obtain the new tag name from the rest of our command */
1868         sp = strchr(command_buf.buf, ' ') + 1;
1869         t = pool_alloc(sizeof(struct tag));
1870         t->next_tag = NULL;
1871         t->name = pool_strdup(sp);
1872         if (last_tag)
1873                 last_tag->next_tag = t;
1874         else
1875                 first_tag = t;
1876         last_tag = t;
1877         read_next_command();
1878
1879         /* from ... */
1880         if (prefixcmp(command_buf.buf, "from "))
1881                 die("Expected from command, got %s", command_buf.buf);
1882         from = strchr(command_buf.buf, ' ') + 1;
1883         s = lookup_branch(from);
1884         if (s) {
1885                 hashcpy(sha1, s->sha1);
1886         } else if (*from == ':') {
1887                 struct object_entry *oe;
1888                 from_mark = strtoumax(from + 1, NULL, 10);
1889                 oe = find_mark(from_mark);
1890                 if (oe->type != OBJ_COMMIT)
1891                         die("Mark :%" PRIuMAX " not a commit", from_mark);
1892                 hashcpy(sha1, oe->sha1);
1893         } else if (!get_sha1(from, sha1)) {
1894                 unsigned long size;
1895                 char *buf;
1896
1897                 buf = read_object_with_reference(sha1,
1898                         commit_type, &size, sha1);
1899                 if (!buf || size < 46)
1900                         die("Not a valid commit: %s", from);
1901                 free(buf);
1902         } else
1903                 die("Invalid ref name or SHA1 expression: %s", from);
1904         read_next_command();
1905
1906         /* tagger ... */
1907         if (prefixcmp(command_buf.buf, "tagger "))
1908                 die("Expected tagger command, got %s", command_buf.buf);
1909         tagger = parse_ident(command_buf.buf + 7);
1910
1911         /* tag payload/message */
1912         read_next_command();
1913         msg = cmd_data(&msglen);
1914
1915         /* build the tag object */
1916         size_dbuf(&new_data, 67+strlen(t->name)+strlen(tagger)+msglen);
1917         sp = new_data.buffer;
1918         sp += sprintf(sp, "object %s\n", sha1_to_hex(sha1));
1919         sp += sprintf(sp, "type %s\n", commit_type);
1920         sp += sprintf(sp, "tag %s\n", t->name);
1921         sp += sprintf(sp, "tagger %s\n", tagger);
1922         *sp++ = '\n';
1923         memcpy(sp, msg, msglen);
1924         sp += msglen;
1925         free(tagger);
1926         free(msg);
1927
1928         if (store_object(OBJ_TAG, new_data.buffer,
1929                 sp - (char*)new_data.buffer,
1930                 NULL, t->sha1, 0))
1931                 t->pack_id = MAX_PACK_ID;
1932         else
1933                 t->pack_id = pack_id;
1934 }
1935
1936 static void cmd_reset_branch(void)
1937 {
1938         struct branch *b;
1939         char *sp;
1940
1941         /* Obtain the branch name from the rest of our command */
1942         sp = strchr(command_buf.buf, ' ') + 1;
1943         b = lookup_branch(sp);
1944         if (b) {
1945                 hashclr(b->sha1);
1946                 hashclr(b->branch_tree.versions[0].sha1);
1947                 hashclr(b->branch_tree.versions[1].sha1);
1948                 if (b->branch_tree.tree) {
1949                         release_tree_content_recursive(b->branch_tree.tree);
1950                         b->branch_tree.tree = NULL;
1951                 }
1952         }
1953         else
1954                 b = new_branch(sp);
1955         read_next_command();
1956         cmd_from(b);
1957 }
1958
1959 static void cmd_checkpoint(void)
1960 {
1961         if (object_count) {
1962                 cycle_packfile();
1963                 dump_branches();
1964                 dump_tags();
1965                 dump_marks();
1966         }
1967         read_next_command();
1968 }
1969
1970 static void import_marks(const char *input_file)
1971 {
1972         char line[512];
1973         FILE *f = fopen(input_file, "r");
1974         if (!f)
1975                 die("cannot read %s: %s", input_file, strerror(errno));
1976         while (fgets(line, sizeof(line), f)) {
1977                 uintmax_t mark;
1978                 char *end;
1979                 unsigned char sha1[20];
1980                 struct object_entry *e;
1981
1982                 end = strchr(line, '\n');
1983                 if (line[0] != ':' || !end)
1984                         die("corrupt mark line: %s", line);
1985                 *end = 0;
1986                 mark = strtoumax(line + 1, &end, 10);
1987                 if (!mark || end == line + 1
1988                         || *end != ' ' || get_sha1(end + 1, sha1))
1989                         die("corrupt mark line: %s", line);
1990                 e = find_object(sha1);
1991                 if (!e) {
1992                         enum object_type type = sha1_object_info(sha1, NULL);
1993                         if (type < 0)
1994                                 die("object not found: %s", sha1_to_hex(sha1));
1995                         e = insert_object(sha1);
1996                         e->type = type;
1997                         e->pack_id = MAX_PACK_ID;
1998                         e->offset = 1; /* just not zero! */
1999                 }
2000                 insert_mark(mark, e);
2001         }
2002         fclose(f);
2003 }
2004
2005 static const char fast_import_usage[] =
2006 "git-fast-import [--date-format=f] [--max-pack-size=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file]";
2007
2008 int main(int argc, const char **argv)
2009 {
2010         int i, show_stats = 1;
2011
2012         git_config(git_default_config);
2013         alloc_objects(object_entry_alloc);
2014         strbuf_init(&command_buf);
2015         atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
2016         branch_table = xcalloc(branch_table_sz, sizeof(struct branch*));
2017         avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*));
2018         marks = pool_calloc(1, sizeof(struct mark_set));
2019
2020         for (i = 1; i < argc; i++) {
2021                 const char *a = argv[i];
2022
2023                 if (*a != '-' || !strcmp(a, "--"))
2024                         break;
2025                 else if (!prefixcmp(a, "--date-format=")) {
2026                         const char *fmt = a + 14;
2027                         if (!strcmp(fmt, "raw"))
2028                                 whenspec = WHENSPEC_RAW;
2029                         else if (!strcmp(fmt, "rfc2822"))
2030                                 whenspec = WHENSPEC_RFC2822;
2031                         else if (!strcmp(fmt, "now"))
2032                                 whenspec = WHENSPEC_NOW;
2033                         else
2034                                 die("unknown --date-format argument %s", fmt);
2035                 }
2036                 else if (!prefixcmp(a, "--max-pack-size="))
2037                         max_packsize = strtoumax(a + 16, NULL, 0) * 1024 * 1024;
2038                 else if (!prefixcmp(a, "--depth="))
2039                         max_depth = strtoul(a + 8, NULL, 0);
2040                 else if (!prefixcmp(a, "--active-branches="))
2041                         max_active_branches = strtoul(a + 18, NULL, 0);
2042                 else if (!prefixcmp(a, "--import-marks="))
2043                         import_marks(a + 15);
2044                 else if (!prefixcmp(a, "--export-marks="))
2045                         mark_file = a + 15;
2046                 else if (!prefixcmp(a, "--export-pack-edges=")) {
2047                         if (pack_edges)
2048                                 fclose(pack_edges);
2049                         pack_edges = fopen(a + 20, "a");
2050                         if (!pack_edges)
2051                                 die("Cannot open %s: %s", a + 20, strerror(errno));
2052                 } else if (!strcmp(a, "--force"))
2053                         force_update = 1;
2054                 else if (!strcmp(a, "--quiet"))
2055                         show_stats = 0;
2056                 else if (!strcmp(a, "--stats"))
2057                         show_stats = 1;
2058                 else
2059                         die("unknown option %s", a);
2060         }
2061         if (i != argc)
2062                 usage(fast_import_usage);
2063
2064         prepare_packed_git();
2065         start_packfile();
2066         for (;;) {
2067                 read_next_command();
2068                 if (command_buf.eof)
2069                         break;
2070                 else if (!strcmp("blob", command_buf.buf))
2071                         cmd_new_blob();
2072                 else if (!prefixcmp(command_buf.buf, "commit "))
2073                         cmd_new_commit();
2074                 else if (!prefixcmp(command_buf.buf, "tag "))
2075                         cmd_new_tag();
2076                 else if (!prefixcmp(command_buf.buf, "reset "))
2077                         cmd_reset_branch();
2078                 else if (!strcmp("checkpoint", command_buf.buf))
2079                         cmd_checkpoint();
2080                 else
2081                         die("Unsupported command: %s", command_buf.buf);
2082         }
2083         end_packfile();
2084
2085         dump_branches();
2086         dump_tags();
2087         unkeep_all_packs();
2088         dump_marks();
2089
2090         if (pack_edges)
2091                 fclose(pack_edges);
2092
2093         if (show_stats) {
2094                 uintmax_t total_count = 0, duplicate_count = 0;
2095                 for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++)
2096                         total_count += object_count_by_type[i];
2097                 for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++)
2098                         duplicate_count += duplicate_count_by_type[i];
2099
2100                 fprintf(stderr, "%s statistics:\n", argv[0]);
2101                 fprintf(stderr, "---------------------------------------------------------------------\n");
2102                 fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
2103                 fprintf(stderr, "Total objects:   %10" PRIuMAX " (%10" PRIuMAX " duplicates                  )\n", total_count, duplicate_count);
2104                 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]);
2105                 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]);
2106                 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]);
2107                 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]);
2108                 fprintf(stderr, "Total branches:  %10lu (%10lu loads     )\n", branch_count, branch_load_count);
2109                 fprintf(stderr, "      marks:     %10" PRIuMAX " (%10" PRIuMAX " unique    )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
2110                 fprintf(stderr, "      atoms:     %10u\n", atom_cnt);
2111                 fprintf(stderr, "Memory total:    %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024);
2112                 fprintf(stderr, "       pools:    %10lu KiB\n", (unsigned long)(total_allocd/1024));
2113                 fprintf(stderr, "     objects:    %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
2114                 fprintf(stderr, "---------------------------------------------------------------------\n");
2115                 pack_report();
2116                 fprintf(stderr, "---------------------------------------------------------------------\n");
2117                 fprintf(stderr, "\n");
2118         }
2119
2120         return failure ? 1 : 0;
2121 }