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_rnm | file_obm | file_inm;
  30   file_clr ::= 'deleteall' lf;
  31   file_del ::= 'D' sp path_str lf;
  32   file_rnm ::= 'R' sp path_str sp path_str lf;
  33   file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf;
  34   file_inm ::= 'M' sp mode sp 'inline' sp path_str lf
  35     data;
  36
  37   new_tag ::= 'tag' sp tag_str lf
  38     'from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf
  39         'tagger' sp name '<' email '>' when lf
  40     tag_msg;
  41   tag_msg ::= data;
  42
  43   reset_branch ::= 'reset' sp ref_str lf
  44     ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)?
  45     lf;
  46
  47   checkpoint ::= 'checkpoint' lf
  48     lf;
  49
  50      # note: the first idnum in a stream should be 1 and subsequent
  51      # idnums should not have gaps between values as this will cause
  52      # the stream parser to reserve space for the gapped values.  An
  53          # idnum can be updated in the future to a new object by issuing
  54      # a new mark directive with the old idnum.
  55          #
  56   mark ::= 'mark' sp idnum lf;
  57   data ::= (delimited_data | exact_data)
  58     lf;
  59
  60     # note: delim may be any string but must not contain lf.
  61     # data_line may contain any data but must not be exactly
  62     # delim.
  63   delimited_data ::= 'data' sp '<<' delim lf
  64     (data_line lf)*
  65         delim lf;
  66
  67      # note: declen indicates the length of binary_data in bytes.
  68      # declen does not include the lf preceeding the binary data.
  69      #
  70   exact_data ::= 'data' sp declen lf
  71     binary_data;
  72
  73      # note: quoted strings are C-style quoting supporting \c for
  74      # common escapes of 'c' (e..g \n, \t, \\, \") or \nnn where nnn
  75          # is the signed byte value in octal.  Note that the only
  76      # characters which must actually be escaped to protect the
  77      # stream formatting is: \, " and LF.  Otherwise these values
  78          # are UTF8.
  79      #
  80   ref_str     ::= ref;
  81   sha1exp_str ::= sha1exp;
  82   tag_str     ::= tag;
  83   path_str    ::= path    | '"' quoted(path)    '"' ;
  84   mode        ::= '100644' | '644'
  85                 | '100755' | '755'
  86                 | '120000'
  87                 ;
  88
  89   declen ::= # unsigned 32 bit value, ascii base10 notation;
  90   bigint ::= # unsigned integer value, ascii base10 notation;
  91   binary_data ::= # file content, not interpreted;
  92
  93   when         ::= raw_when | rfc2822_when;
  94   raw_when     ::= ts sp tz;
  95   rfc2822_when ::= # Valid RFC 2822 date and time;
  96
  97   sp ::= # ASCII space character;
  98   lf ::= # ASCII newline (LF) character;
  99
 100      # note: a colon (':') must precede the numerical value assigned to
 101          # an idnum.  This is to distinguish it from a ref or tag name as
 102      # GIT does not permit ':' in ref or tag strings.
 103          #
 104   idnum   ::= ':' bigint;
 105   path    ::= # GIT style file path, e.g. "a/b/c";
 106   ref     ::= # GIT ref name, e.g. "refs/heads/MOZ_GECKO_EXPERIMENT";
 107   tag     ::= # GIT tag name, e.g. "FIREFOX_1_5";
 108   sha1exp ::= # Any valid GIT SHA1 expression;
 109   hexsha1 ::= # SHA1 in hexadecimal format;
 110
 111      # note: name and email are UTF8 strings, however name must not
 112          # contain '<' or lf and email must not contain any of the
 113      # following: '<', '>', lf.
 114          #
 115   name  ::= # valid GIT author/committer name;
 116   email ::= # valid GIT author/committer email;
 117   ts    ::= # time since the epoch in seconds, ascii base10 notation;
 118   tz    ::= # GIT style timezone;
 119 */
 120
 121 #include "builtin.h"
 122 #include "cache.h"
 123 #include "object.h"
 124 #include "blob.h"
 125 #include "tree.h"
 126 #include "commit.h"
 127 #include "delta.h"
 128 #include "pack.h"
 129 #include "refs.h"
 130 #include "csum-file.h"
 131 #include "strbuf.h"
 132 #include "quote.h"
 133
 134 #define PACK_ID_BITS 16
 135 #define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
 136
 137 struct object_entry
 138 {
 139         struct object_entry *next;
 140         uint32_t offset;
 141         unsigned type : TYPE_BITS;
 142         unsigned pack_id : PACK_ID_BITS;
 143         unsigned char sha1[20];
 144 };
 145
 146 struct object_entry_pool
 147 {
 148         struct object_entry_pool *next_pool;
 149         struct object_entry *next_free;
 150         struct object_entry *end;
 151         struct object_entry entries[FLEX_ARRAY]; /* more */
 152 };
 153
 154 struct mark_set
 155 {
 156         union {
 157                 struct object_entry *marked[1024];
 158                 struct mark_set *sets[1024];
 159         } data;
 160         unsigned int shift;
 161 };
 162
 163 struct last_object
 164 {
 165         void *data;
 166         unsigned long len;
 167         uint32_t offset;
 168         unsigned int depth;
 169         unsigned no_free:1;
 170 };
 171
 172 struct mem_pool
 173 {
 174         struct mem_pool *next_pool;
 175         char *next_free;
 176         char *end;
 177         char space[FLEX_ARRAY]; /* more */
 178 };
 179
 180 struct atom_str
 181 {
 182         struct atom_str *next_atom;
 183         unsigned short str_len;
 184         char str_dat[FLEX_ARRAY]; /* more */
 185 };
 186
 187 struct tree_content;
 188 struct tree_entry
 189 {
 190         struct tree_content *tree;
 191         struct atom_str* name;
 192         struct tree_entry_ms
 193         {
 194                 uint16_t mode;
 195                 unsigned char sha1[20];
 196         } versions[2];
 197 };
 198
 199 struct tree_content
 200 {
 201         unsigned int entry_capacity; /* must match avail_tree_content */
 202         unsigned int entry_count;
 203         unsigned int delta_depth;
 204         struct tree_entry *entries[FLEX_ARRAY]; /* more */
 205 };
 206
 207 struct avail_tree_content
 208 {
 209         unsigned int entry_capacity; /* must match tree_content */
 210         struct avail_tree_content *next_avail;
 211 };
 212
 213 struct branch
 214 {
 215         struct branch *table_next_branch;
 216         struct branch *active_next_branch;
 217         const char *name;
 218         struct tree_entry branch_tree;
 219         uintmax_t last_commit;
 220         unsigned active : 1;
 221         unsigned pack_id : PACK_ID_BITS;
 222         unsigned char sha1[20];
 223 };
 224
 225 struct tag
 226 {
 227         struct tag *next_tag;
 228         const char *name;
 229         unsigned int pack_id;
 230         unsigned char sha1[20];
 231 };
 232
 233 struct dbuf
 234 {
 235         void *buffer;
 236         size_t capacity;
 237 };
 238
 239 struct hash_list
 240 {
 241         struct hash_list *next;
 242         unsigned char sha1[20];
 243 };
 244
 245 typedef enum {
 246         WHENSPEC_RAW = 1,
 247         WHENSPEC_RFC2822,
 248         WHENSPEC_NOW,
 249 } whenspec_type;
 250
 251 /* Configured limits on output */
 252 static unsigned long max_depth = 10;
 253 static off_t max_packsize = (1LL << 32) - 1;
 254 static int force_update;
 255
 256 /* Stats and misc. counters */
 257 static uintmax_t alloc_count;
 258 static uintmax_t marks_set_count;
 259 static uintmax_t object_count_by_type[1 << TYPE_BITS];
 260 static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
 261 static uintmax_t delta_count_by_type[1 << TYPE_BITS];
 262 static unsigned long object_count;
 263 static unsigned long branch_count;
 264 static unsigned long branch_load_count;
 265 static int failure;
 266 static FILE *pack_edges;
 267
 268 /* Memory pools */
 269 static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
 270 static size_t total_allocd;
 271 static struct mem_pool *mem_pool;
 272
 273 /* Atom management */
 274 static unsigned int atom_table_sz = 4451;
 275 static unsigned int atom_cnt;
 276 static struct atom_str **atom_table;
 277
 278 /* The .pack file being generated */
 279 static unsigned int pack_id;
 280 static struct packed_git *pack_data;
 281 static struct packed_git **all_packs;
 282 static unsigned long pack_size;
 283
 284 /* Table of objects we've written. */
 285 static unsigned int object_entry_alloc = 5000;
 286 static struct object_entry_pool *blocks;
 287 static struct object_entry *object_table[1 << 16];
 288 static struct mark_set *marks;
 289 static const char* mark_file;
 290
 291 /* Our last blob */
 292 static struct last_object last_blob;
 293
 294 /* Tree management */
 295 static unsigned int tree_entry_alloc = 1000;
 296 static void *avail_tree_entry;
 297 static unsigned int avail_tree_table_sz = 100;
 298 static struct avail_tree_content **avail_tree_table;
 299 static struct dbuf old_tree;
 300 static struct dbuf new_tree;
 301
 302 /* Branch data */
 303 static unsigned long max_active_branches = 5;
 304 static unsigned long cur_active_branches;
 305 static unsigned long branch_table_sz = 1039;
 306 static struct branch **branch_table;
 307 static struct branch *active_branches;
 308
 309 /* Tag data */
 310 static struct tag *first_tag;
 311 static struct tag *last_tag;
 312
 313 /* Input stream parsing */
 314 static whenspec_type whenspec = WHENSPEC_RAW;
 315 static struct strbuf command_buf;
 316 static uintmax_t next_mark;
 317 static struct dbuf new_data;
 318
 319
 320 static void alloc_objects(unsigned int cnt)
 321 {
 322         struct object_entry_pool *b;
 323
 324         b = xmalloc(sizeof(struct object_entry_pool)
 325                 + cnt * sizeof(struct object_entry));
 326         b->next_pool = blocks;
 327         b->next_free = b->entries;
 328         b->end = b->entries + cnt;
 329         blocks = b;
 330         alloc_count += cnt;
 331 }
 332
 333 static struct object_entry *new_object(unsigned char *sha1)
 334 {
 335         struct object_entry *e;
 336
 337         if (blocks->next_free == blocks->end)
 338                 alloc_objects(object_entry_alloc);
 339
 340         e = blocks->next_free++;
 341         hashcpy(e->sha1, sha1);
 342         return e;
 343 }
 344
 345 static struct object_entry *find_object(unsigned char *sha1)
 346 {
 347         unsigned int h = sha1[0] << 8 | sha1[1];
 348         struct object_entry *e;
 349         for (e = object_table[h]; e; e = e->next)
 350                 if (!hashcmp(sha1, e->sha1))
 351                         return e;
 352         return NULL;
 353 }
 354
 355 static struct object_entry *insert_object(unsigned char *sha1)
 356 {
 357         unsigned int h = sha1[0] << 8 | sha1[1];
 358         struct object_entry *e = object_table[h];
 359         struct object_entry *p = NULL;
 360
 361         while (e) {
 362                 if (!hashcmp(sha1, e->sha1))
 363                         return e;
 364                 p = e;
 365                 e = e->next;
 366         }
 367
 368         e = new_object(sha1);
 369         e->next = NULL;
 370         e->offset = 0;
 371         if (p)
 372                 p->next = e;
 373         else
 374                 object_table[h] = e;
 375         return e;
 376 }
 377
 378 static unsigned int hc_str(const char *s, size_t len)
 379 {
 380         unsigned int r = 0;
 381         while (len-- > 0)
 382                 r = r * 31 + *s++;
 383         return r;
 384 }
 385
 386 static void *pool_alloc(size_t len)
 387 {
 388         struct mem_pool *p;
 389         void *r;
 390
 391         for (p = mem_pool; p; p = p->next_pool)
 392                 if ((p->end - p->next_free >= len))
 393                         break;
 394
 395         if (!p) {
 396                 if (len >= (mem_pool_alloc/2)) {
 397                         total_allocd += len;
 398                         return xmalloc(len);
 399                 }
 400                 total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
 401                 p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc);
 402                 p->next_pool = mem_pool;
 403                 p->next_free = p->space;
 404                 p->end = p->next_free + mem_pool_alloc;
 405                 mem_pool = p;
 406         }
 407
 408         r = p->next_free;
 409         /* round out to a pointer alignment */
 410         if (len & (sizeof(void*) - 1))
 411                 len += sizeof(void*) - (len & (sizeof(void*) - 1));
 412         p->next_free += len;
 413         return r;
 414 }
 415
 416 static void *pool_calloc(size_t count, size_t size)
 417 {
 418         size_t len = count * size;
 419         void *r = pool_alloc(len);
 420         memset(r, 0, len);
 421         return r;
 422 }
 423
 424 static char *pool_strdup(const char *s)
 425 {
 426         char *r = pool_alloc(strlen(s) + 1);
 427         strcpy(r, s);
 428         return r;
 429 }
 430
 431 static void size_dbuf(struct dbuf *b, size_t maxlen)
 432 {
 433         if (b->buffer) {
 434                 if (b->capacity >= maxlen)
 435                         return;
 436                 free(b->buffer);
 437         }
 438         b->capacity = ((maxlen / 1024) + 1) * 1024;
 439         b->buffer = xmalloc(b->capacity);
 440 }
 441
 442 static void insert_mark(uintmax_t idnum, struct object_entry *oe)
 443 {
 444         struct mark_set *s = marks;
 445         while ((idnum >> s->shift) >= 1024) {
 446                 s = pool_calloc(1, sizeof(struct mark_set));
 447                 s->shift = marks->shift + 10;
 448                 s->data.sets[0] = marks;
 449                 marks = s;
 450         }
 451         while (s->shift) {
 452                 uintmax_t i = idnum >> s->shift;
 453                 idnum -= i << s->shift;
 454                 if (!s->data.sets[i]) {
 455                         s->data.sets[i] = pool_calloc(1, sizeof(struct mark_set));
 456                         s->data.sets[i]->shift = s->shift - 10;
 457                 }
 458                 s = s->data.sets[i];
 459         }
 460         if (!s->data.marked[idnum])
 461                 marks_set_count++;
 462         s->data.marked[idnum] = oe;
 463 }
 464
 465 static struct object_entry *find_mark(uintmax_t idnum)
 466 {
 467         uintmax_t orig_idnum = idnum;
 468         struct mark_set *s = marks;
 469         struct object_entry *oe = NULL;
 470         if ((idnum >> s->shift) < 1024) {
 471                 while (s && s->shift) {
 472                         uintmax_t i = idnum >> s->shift;
 473                         idnum -= i << s->shift;
 474                         s = s->data.sets[i];
 475                 }
 476                 if (s)
 477                         oe = s->data.marked[idnum];
 478         }
 479         if (!oe)
 480                 die("mark :%" PRIuMAX " not declared", orig_idnum);
 481         return oe;
 482 }
 483
 484 static struct atom_str *to_atom(const char *s, unsigned short len)
 485 {
 486         unsigned int hc = hc_str(s, len) % atom_table_sz;
 487         struct atom_str *c;
 488
 489         for (c = atom_table[hc]; c; c = c->next_atom)
 490                 if (c->str_len == len && !strncmp(s, c->str_dat, len))
 491                         return c;
 492
 493         c = pool_alloc(sizeof(struct atom_str) + len + 1);
 494         c->str_len = len;
 495         strncpy(c->str_dat, s, len);
 496         c->str_dat[len] = 0;
 497         c->next_atom = atom_table[hc];
 498         atom_table[hc] = c;
 499         atom_cnt++;
 500         return c;
 501 }
 502
 503 static struct branch *lookup_branch(const char *name)
 504 {
 505         unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
 506         struct branch *b;
 507
 508         for (b = branch_table[hc]; b; b = b->table_next_branch)
 509                 if (!strcmp(name, b->name))
 510                         return b;
 511         return NULL;
 512 }
 513
 514 static struct branch *new_branch(const char *name)
 515 {
 516         unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
 517         struct branch* b = lookup_branch(name);
 518
 519         if (b)
 520                 die("Invalid attempt to create duplicate branch: %s", name);
 521         if (check_ref_format(name))
 522                 die("Branch name doesn't conform to GIT standards: %s", name);
 523
 524         b = pool_calloc(1, sizeof(struct branch));
 525         b->name = pool_strdup(name);
 526         b->table_next_branch = branch_table[hc];
 527         b->branch_tree.versions[0].mode = S_IFDIR;
 528         b->branch_tree.versions[1].mode = S_IFDIR;
 529         b->active = 0;
 530         b->pack_id = MAX_PACK_ID;
 531         branch_table[hc] = b;
 532         branch_count++;
 533         return b;
 534 }
 535
 536 static unsigned int hc_entries(unsigned int cnt)
 537 {
 538         cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
 539         return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
 540 }
 541
 542 static struct tree_content *new_tree_content(unsigned int cnt)
 543 {
 544         struct avail_tree_content *f, *l = NULL;
 545         struct tree_content *t;
 546         unsigned int hc = hc_entries(cnt);
 547
 548         for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
 549                 if (f->entry_capacity >= cnt)
 550                         break;
 551
 552         if (f) {
 553                 if (l)
 554                         l->next_avail = f->next_avail;
 555                 else
 556                         avail_tree_table[hc] = f->next_avail;
 557         } else {
 558                 cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
 559                 f = pool_alloc(sizeof(*t) + sizeof(t->entries[0]) * cnt);
 560                 f->entry_capacity = cnt;
 561         }
 562
 563         t = (struct tree_content*)f;
 564         t->entry_count = 0;
 565         t->delta_depth = 0;
 566         return t;
 567 }
 568
 569 static void release_tree_entry(struct tree_entry *e);
 570 static void release_tree_content(struct tree_content *t)
 571 {
 572         struct avail_tree_content *f = (struct avail_tree_content*)t;
 573         unsigned int hc = hc_entries(f->entry_capacity);
 574         f->next_avail = avail_tree_table[hc];
 575         avail_tree_table[hc] = f;
 576 }
 577
 578 static void release_tree_content_recursive(struct tree_content *t)
 579 {
 580         unsigned int i;
 581         for (i = 0; i < t->entry_count; i++)
 582                 release_tree_entry(t->entries[i]);
 583         release_tree_content(t);
 584 }
 585
 586 static struct tree_content *grow_tree_content(
 587         struct tree_content *t,
 588         int amt)
 589 {
 590         struct tree_content *r = new_tree_content(t->entry_count + amt);
 591         r->entry_count = t->entry_count;
 592         r->delta_depth = t->delta_depth;
 593         memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
 594         release_tree_content(t);
 595         return r;
 596 }
 597
 598 static struct tree_entry *new_tree_entry(void)
 599 {
 600         struct tree_entry *e;
 601
 602         if (!avail_tree_entry) {
 603                 unsigned int n = tree_entry_alloc;
 604                 total_allocd += n * sizeof(struct tree_entry);
 605                 avail_tree_entry = e = xmalloc(n * sizeof(struct tree_entry));
 606                 while (n-- > 1) {
 607                         *((void**)e) = e + 1;
 608                         e++;
 609                 }
 610                 *((void**)e) = NULL;
 611         }
 612
 613         e = avail_tree_entry;
 614         avail_tree_entry = *((void**)e);
 615         return e;
 616 }
 617
 618 static void release_tree_entry(struct tree_entry *e)
 619 {
 620         if (e->tree)
 621                 release_tree_content_recursive(e->tree);
 622         *((void**)e) = avail_tree_entry;
 623         avail_tree_entry = e;
 624 }
 625
 626 static void start_packfile(void)
 627 {
 628         static char tmpfile[PATH_MAX];
 629         struct packed_git *p;
 630         struct pack_header hdr;
 631         int pack_fd;
 632
 633         snprintf(tmpfile, sizeof(tmpfile),
 634                 "%s/tmp_pack_XXXXXX", get_object_directory());
 635         pack_fd = mkstemp(tmpfile);
 636         if (pack_fd < 0)
 637                 die("Can't create %s: %s", tmpfile, strerror(errno));
 638         p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
 639         strcpy(p->pack_name, tmpfile);
 640         p->pack_fd = pack_fd;
 641
 642         hdr.hdr_signature = htonl(PACK_SIGNATURE);
 643         hdr.hdr_version = htonl(2);
 644         hdr.hdr_entries = 0;
 645         write_or_die(p->pack_fd, &hdr, sizeof(hdr));
 646
 647         pack_data = p;
 648         pack_size = sizeof(hdr);
 649         object_count = 0;
 650
 651         all_packs = xrealloc(all_packs, sizeof(*all_packs) * (pack_id + 1));
 652         all_packs[pack_id] = p;
 653 }
 654
 655 static int oecmp (const void *a_, const void *b_)
 656 {
 657         struct object_entry *a = *((struct object_entry**)a_);
 658         struct object_entry *b = *((struct object_entry**)b_);
 659         return hashcmp(a->sha1, b->sha1);
 660 }
 661
 662 static char *create_index(void)
 663 {
 664         static char tmpfile[PATH_MAX];
 665         SHA_CTX ctx;
 666         struct sha1file *f;
 667         struct object_entry **idx, **c, **last, *e;
 668         struct object_entry_pool *o;
 669         uint32_t array[256];
 670         int i, idx_fd;
 671
 672         /* Build the sorted table of object IDs. */
 673         idx = xmalloc(object_count * sizeof(struct object_entry*));
 674         c = idx;
 675         for (o = blocks; o; o = o->next_pool)
 676                 for (e = o->next_free; e-- != o->entries;)
 677                         if (pack_id == e->pack_id)
 678                                 *c++ = e;
 679         last = idx + object_count;
 680         if (c != last)
 681                 die("internal consistency error creating the index");
 682         qsort(idx, object_count, sizeof(struct object_entry*), oecmp);
 683
 684         /* Generate the fan-out array. */
 685         c = idx;
 686         for (i = 0; i < 256; i++) {
 687                 struct object_entry **next = c;;
 688                 while (next < last) {
 689                         if ((*next)->sha1[0] != i)
 690                                 break;
 691                         next++;
 692                 }
 693                 array[i] = htonl(next - idx);
 694                 c = next;
 695         }
 696
 697         snprintf(tmpfile, sizeof(tmpfile),
 698                 "%s/tmp_idx_XXXXXX", get_object_directory());
 699         idx_fd = mkstemp(tmpfile);
 700         if (idx_fd < 0)
 701                 die("Can't create %s: %s", tmpfile, strerror(errno));
 702         f = sha1fd(idx_fd, tmpfile);
 703         sha1write(f, array, 256 * sizeof(int));
 704         SHA1_Init(&ctx);
 705         for (c = idx; c != last; c++) {
 706                 uint32_t offset = htonl((*c)->offset);
 707                 sha1write(f, &offset, 4);
 708                 sha1write(f, (*c)->sha1, sizeof((*c)->sha1));
 709                 SHA1_Update(&ctx, (*c)->sha1, 20);
 710         }
 711         sha1write(f, pack_data->sha1, sizeof(pack_data->sha1));
 712         sha1close(f, NULL, 1);
 713         free(idx);
 714         SHA1_Final(pack_data->sha1, &ctx);
 715         return tmpfile;
 716 }
 717
 718 static char *keep_pack(char *curr_index_name)
 719 {
 720         static char name[PATH_MAX];
 721         static const char *keep_msg = "fast-import";
 722         int keep_fd;
 723
 724         chmod(pack_data->pack_name, 0444);
 725         chmod(curr_index_name, 0444);
 726
 727         snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
 728                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 729         keep_fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 730         if (keep_fd < 0)
 731                 die("cannot create keep file");
 732         write(keep_fd, keep_msg, strlen(keep_msg));
 733         close(keep_fd);
 734
 735         snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
 736                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 737         if (move_temp_to_file(pack_data->pack_name, name))
 738                 die("cannot store pack file");
 739
 740         snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
 741                  get_object_directory(), sha1_to_hex(pack_data->sha1));
 742         if (move_temp_to_file(curr_index_name, name))
 743                 die("cannot store index file");
 744         return name;
 745 }
 746
 747 static void unkeep_all_packs(void)
 748 {
 749         static char name[PATH_MAX];
 750         int k;
 751
 752         for (k = 0; k < pack_id; k++) {
 753                 struct packed_git *p = all_packs[k];
 754                 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
 755                          get_object_directory(), sha1_to_hex(p->sha1));
 756                 unlink(name);
 757         }
 758 }
 759
 760 static void end_packfile(void)
 761 {
 762         struct packed_git *old_p = pack_data, *new_p;
 763
 764         if (object_count) {
 765                 char *idx_name;
 766                 int i;
 767                 struct branch *b;
 768                 struct tag *t;
 769
 770                 fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
 771                                     pack_data->pack_name, object_count);
 772                 close(pack_data->pack_fd);
 773                 idx_name = keep_pack(create_index());
 774
 775                 /* Register the packfile with core git's machinary. */
 776                 new_p = add_packed_git(idx_name, strlen(idx_name), 1);
 777                 if (!new_p)
 778                         die("core git rejected index %s", idx_name);
 779                 new_p->windows = old_p->windows;
 780                 all_packs[pack_id] = new_p;
 781                 install_packed_git(new_p);
 782
 783                 /* Print the boundary */
 784                 if (pack_edges) {
 785                         fprintf(pack_edges, "%s:", new_p->pack_name);
 786                         for (i = 0; i < branch_table_sz; i++) {
 787                                 for (b = branch_table[i]; b; b = b->table_next_branch) {
 788                                         if (b->pack_id == pack_id)
 789                                                 fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
 790                                 }
 791                         }
 792                         for (t = first_tag; t; t = t->next_tag) {
 793                                 if (t->pack_id == pack_id)
 794                                         fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
 795                         }
 796                         fputc('\n', pack_edges);
 797                         fflush(pack_edges);
 798                 }
 799
 800                 pack_id++;
 801         }
 802         else
 803                 unlink(old_p->pack_name);
 804         free(old_p);
 805
 806         /* We can't carry a delta across packfiles. */
 807         free(last_blob.data);
 808         last_blob.data = NULL;
 809         last_blob.len = 0;
 810         last_blob.offset = 0;
 811         last_blob.depth = 0;
 812 }
 813
 814 static void cycle_packfile(void)
 815 {
 816         end_packfile();
 817         start_packfile();
 818 }
 819
 820 static size_t encode_header(
 821         enum object_type type,
 822         size_t size,
 823         unsigned char *hdr)
 824 {
 825         int n = 1;
 826         unsigned char c;
 827
 828         if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
 829                 die("bad type %d", type);
 830
 831         c = (type << 4) | (size & 15);
 832         size >>= 4;
 833         while (size) {
 834                 *hdr++ = c | 0x80;
 835                 c = size & 0x7f;
 836                 size >>= 7;
 837                 n++;
 838         }
 839         *hdr = c;
 840         return n;
 841 }
 842
 843 static int store_object(
 844         enum object_type type,
 845         void *dat,
 846         size_t datlen,
 847         struct last_object *last,
 848         unsigned char *sha1out,
 849         uintmax_t mark)
 850 {
 851         void *out, *delta;
 852         struct object_entry *e;
 853         unsigned char hdr[96];
 854         unsigned char sha1[20];
 855         unsigned long hdrlen, deltalen;
 856         SHA_CTX c;
 857         z_stream s;
 858
 859         hdrlen = sprintf((char*)hdr,"%s %lu", typename(type),
 860                 (unsigned long)datlen) + 1;
 861         SHA1_Init(&c);
 862         SHA1_Update(&c, hdr, hdrlen);
 863         SHA1_Update(&c, dat, datlen);
 864         SHA1_Final(sha1, &c);
 865         if (sha1out)
 866                 hashcpy(sha1out, sha1);
 867
 868         e = insert_object(sha1);
 869         if (mark)
 870                 insert_mark(mark, e);
 871         if (e->offset) {
 872                 duplicate_count_by_type[type]++;
 873                 return 1;
 874         } else if (find_sha1_pack(sha1, packed_git)) {
 875                 e->type = type;
 876                 e->pack_id = MAX_PACK_ID;
 877                 e->offset = 1; /* just not zero! */
 878                 duplicate_count_by_type[type]++;
 879                 return 1;
 880         }
 881
 882         if (last && last->data && last->depth < max_depth) {
 883                 delta = diff_delta(last->data, last->len,
 884                         dat, datlen,
 885                         &deltalen, 0);
 886                 if (delta && deltalen >= datlen) {
 887                         free(delta);
 888                         delta = NULL;
 889                 }
 890         } else
 891                 delta = NULL;
 892
 893         memset(&s, 0, sizeof(s));
 894         deflateInit(&s, zlib_compression_level);
 895         if (delta) {
 896                 s.next_in = delta;
 897                 s.avail_in = deltalen;
 898         } else {
 899                 s.next_in = dat;
 900                 s.avail_in = datlen;
 901         }
 902         s.avail_out = deflateBound(&s, s.avail_in);
 903         s.next_out = out = xmalloc(s.avail_out);
 904         while (deflate(&s, Z_FINISH) == Z_OK)
 905                 /* nothing */;
 906         deflateEnd(&s);
 907
 908         /* Determine if we should auto-checkpoint. */
 909         if ((pack_size + 60 + s.total_out) > max_packsize
 910                 || (pack_size + 60 + s.total_out) < pack_size) {
 911
 912                 /* This new object needs to *not* have the current pack_id. */
 913                 e->pack_id = pack_id + 1;
 914                 cycle_packfile();
 915
 916                 /* We cannot carry a delta into the new pack. */
 917                 if (delta) {
 918                         free(delta);
 919                         delta = NULL;
 920
 921                         memset(&s, 0, sizeof(s));
 922                         deflateInit(&s, zlib_compression_level);
 923                         s.next_in = dat;
 924                         s.avail_in = datlen;
 925                         s.avail_out = deflateBound(&s, s.avail_in);
 926                         s.next_out = out = xrealloc(out, s.avail_out);
 927                         while (deflate(&s, Z_FINISH) == Z_OK)
 928                                 /* nothing */;
 929                         deflateEnd(&s);
 930                 }
 931         }
 932
 933         e->type = type;
 934         e->pack_id = pack_id;
 935         e->offset = pack_size;
 936         object_count++;
 937         object_count_by_type[type]++;
 938
 939         if (delta) {
 940                 unsigned long ofs = e->offset - last->offset;
 941                 unsigned pos = sizeof(hdr) - 1;
 942
 943                 delta_count_by_type[type]++;
 944                 last->depth++;
 945
 946                 hdrlen = encode_header(OBJ_OFS_DELTA, deltalen, hdr);
 947                 write_or_die(pack_data->pack_fd, hdr, hdrlen);
 948                 pack_size += hdrlen;
 949
 950                 hdr[pos] = ofs & 127;
 951                 while (ofs >>= 7)
 952                         hdr[--pos] = 128 | (--ofs & 127);
 953                 write_or_die(pack_data->pack_fd, hdr + pos, sizeof(hdr) - pos);
 954                 pack_size += sizeof(hdr) - pos;
 955         } else {
 956                 if (last)
 957                         last->depth = 0;
 958                 hdrlen = encode_header(type, datlen, hdr);
 959                 write_or_die(pack_data->pack_fd, hdr, hdrlen);
 960                 pack_size += hdrlen;
 961         }
 962
 963         write_or_die(pack_data->pack_fd, out, s.total_out);
 964         pack_size += s.total_out;
 965
 966         free(out);
 967         free(delta);
 968         if (last) {
 969                 if (!last->no_free)
 970                         free(last->data);
 971                 last->data = dat;
 972                 last->offset = e->offset;
 973                 last->len = datlen;
 974         }
 975         return 0;
 976 }
 977
 978 static void *gfi_unpack_entry(
 979         struct object_entry *oe,
 980         unsigned long *sizep)
 981 {
 982         enum object_type type;
 983         struct packed_git *p = all_packs[oe->pack_id];
 984         if (p == pack_data)
 985                 p->pack_size = pack_size + 20;
 986         return unpack_entry(p, oe->offset, &type, sizep);
 987 }
 988
 989 static const char *get_mode(const char *str, uint16_t *modep)
 990 {
 991         unsigned char c;
 992         uint16_t mode = 0;
 993
 994         while ((c = *str++) != ' ') {
 995                 if (c < '0' || c > '7')
 996                         return NULL;
 997                 mode = (mode << 3) + (c - '0');
 998         }
 999         *modep = mode;
1000         return str;
1001 }
1002
1003 static void load_tree(struct tree_entry *root)
1004 {
1005         unsigned char* sha1 = root->versions[1].sha1;
1006         struct object_entry *myoe;
1007         struct tree_content *t;
1008         unsigned long size;
1009         char *buf;
1010         const char *c;
1011
1012         root->tree = t = new_tree_content(8);
1013         if (is_null_sha1(sha1))
1014                 return;
1015
1016         myoe = find_object(sha1);
1017         if (myoe && myoe->pack_id != MAX_PACK_ID) {
1018                 if (myoe->type != OBJ_TREE)
1019                         die("Not a tree: %s", sha1_to_hex(sha1));
1020                 t->delta_depth = 0;
1021                 buf = gfi_unpack_entry(myoe, &size);
1022         } else {
1023                 enum object_type type;
1024                 buf = read_sha1_file(sha1, &type, &size);
1025                 if (!buf || type != OBJ_TREE)
1026                         die("Can't load tree %s", sha1_to_hex(sha1));
1027         }
1028
1029         c = buf;
1030         while (c != (buf + size)) {
1031                 struct tree_entry *e = new_tree_entry();
1032
1033                 if (t->entry_count == t->entry_capacity)
1034                         root->tree = t = grow_tree_content(t, t->entry_count);
1035                 t->entries[t->entry_count++] = e;
1036
1037                 e->tree = NULL;
1038                 c = get_mode(c, &e->versions[1].mode);
1039                 if (!c)
1040                         die("Corrupt mode in %s", sha1_to_hex(sha1));
1041                 e->versions[0].mode = e->versions[1].mode;
1042                 e->name = to_atom(c, strlen(c));
1043                 c += e->name->str_len + 1;
1044                 hashcpy(e->versions[0].sha1, (unsigned char*)c);
1045                 hashcpy(e->versions[1].sha1, (unsigned char*)c);
1046                 c += 20;
1047         }
1048         free(buf);
1049 }
1050
1051 static int tecmp0 (const void *_a, const void *_b)
1052 {
1053         struct tree_entry *a = *((struct tree_entry**)_a);
1054         struct tree_entry *b = *((struct tree_entry**)_b);
1055         return base_name_compare(
1056                 a->name->str_dat, a->name->str_len, a->versions[0].mode,
1057                 b->name->str_dat, b->name->str_len, b->versions[0].mode);
1058 }
1059
1060 static int tecmp1 (const void *_a, const void *_b)
1061 {
1062         struct tree_entry *a = *((struct tree_entry**)_a);
1063         struct tree_entry *b = *((struct tree_entry**)_b);
1064         return base_name_compare(
1065                 a->name->str_dat, a->name->str_len, a->versions[1].mode,
1066                 b->name->str_dat, b->name->str_len, b->versions[1].mode);
1067 }
1068
1069 static void mktree(struct tree_content *t,
1070         int v,
1071         unsigned long *szp,
1072         struct dbuf *b)
1073 {
1074         size_t maxlen = 0;
1075         unsigned int i;
1076         char *c;
1077
1078         if (!v)
1079                 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0);
1080         else
1081                 qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1);
1082
1083         for (i = 0; i < t->entry_count; i++) {
1084                 if (t->entries[i]->versions[v].mode)
1085                         maxlen += t->entries[i]->name->str_len + 34;
1086         }
1087
1088         size_dbuf(b, maxlen);
1089         c = b->buffer;
1090         for (i = 0; i < t->entry_count; i++) {
1091                 struct tree_entry *e = t->entries[i];
1092                 if (!e->versions[v].mode)
1093                         continue;
1094                 c += sprintf(c, "%o", (unsigned int)e->versions[v].mode);
1095                 *c++ = ' ';
1096                 strcpy(c, e->name->str_dat);
1097                 c += e->name->str_len + 1;
1098                 hashcpy((unsigned char*)c, e->versions[v].sha1);
1099                 c += 20;
1100         }
1101         *szp = c - (char*)b->buffer;
1102 }
1103
1104 static void store_tree(struct tree_entry *root)
1105 {
1106         struct tree_content *t = root->tree;
1107         unsigned int i, j, del;
1108         unsigned long new_len;
1109         struct last_object lo;
1110         struct object_entry *le;
1111
1112         if (!is_null_sha1(root->versions[1].sha1))
1113                 return;
1114
1115         for (i = 0; i < t->entry_count; i++) {
1116                 if (t->entries[i]->tree)
1117                         store_tree(t->entries[i]);
1118         }
1119
1120         le = find_object(root->versions[0].sha1);
1121         if (!S_ISDIR(root->versions[0].mode)
1122                 || !le
1123                 || le->pack_id != pack_id) {
1124                 lo.data = NULL;
1125                 lo.depth = 0;
1126                 lo.no_free = 0;
1127         } else {
1128                 mktree(t, 0, &lo.len, &old_tree);
1129                 lo.data = old_tree.buffer;
1130                 lo.offset = le->offset;
1131                 lo.depth = t->delta_depth;
1132                 lo.no_free = 1;
1133         }
1134
1135         mktree(t, 1, &new_len, &new_tree);
1136         store_object(OBJ_TREE, new_tree.buffer, new_len,
1137                 &lo, root->versions[1].sha1, 0);
1138
1139         t->delta_depth = lo.depth;
1140         for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
1141                 struct tree_entry *e = t->entries[i];
1142                 if (e->versions[1].mode) {
1143                         e->versions[0].mode = e->versions[1].mode;
1144                         hashcpy(e->versions[0].sha1, e->versions[1].sha1);
1145                         t->entries[j++] = e;
1146                 } else {
1147                         release_tree_entry(e);
1148                         del++;
1149                 }
1150         }
1151         t->entry_count -= del;
1152 }
1153
1154 static int tree_content_set(
1155         struct tree_entry *root,
1156         const char *p,
1157         const unsigned char *sha1,
1158         const uint16_t mode,
1159         struct tree_content *subtree)
1160 {
1161         struct tree_content *t = root->tree;
1162         const char *slash1;
1163         unsigned int i, n;
1164         struct tree_entry *e;
1165
1166         slash1 = strchr(p, '/');
1167         if (slash1)
1168                 n = slash1 - p;
1169         else
1170                 n = strlen(p);
1171         if (!n)
1172                 die("Empty path component found in input");
1173         if (!slash1 && !S_ISDIR(mode) && subtree)
1174                 die("Non-directories cannot have subtrees");
1175
1176         for (i = 0; i < t->entry_count; i++) {
1177                 e = t->entries[i];
1178                 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1179                         if (!slash1) {
1180                                 if (!S_ISDIR(mode)
1181                                                 && e->versions[1].mode == mode
1182                                                 && !hashcmp(e->versions[1].sha1, sha1))
1183                                         return 0;
1184                                 e->versions[1].mode = mode;
1185                                 hashcpy(e->versions[1].sha1, sha1);
1186                                 if (e->tree)
1187                                         release_tree_content_recursive(e->tree);
1188                                 e->tree = subtree;
1189                                 hashclr(root->versions[1].sha1);
1190                                 return 1;
1191                         }
1192                         if (!S_ISDIR(e->versions[1].mode)) {
1193                                 e->tree = new_tree_content(8);
1194                                 e->versions[1].mode = S_IFDIR;
1195                         }
1196                         if (!e->tree)
1197                                 load_tree(e);
1198                         if (tree_content_set(e, slash1 + 1, sha1, mode, subtree)) {
1199                                 hashclr(root->versions[1].sha1);
1200                                 return 1;
1201                         }
1202                         return 0;
1203                 }
1204         }
1205
1206         if (t->entry_count == t->entry_capacity)
1207                 root->tree = t = grow_tree_content(t, t->entry_count);
1208         e = new_tree_entry();
1209         e->name = to_atom(p, n);
1210         e->versions[0].mode = 0;
1211         hashclr(e->versions[0].sha1);
1212         t->entries[t->entry_count++] = e;
1213         if (slash1) {
1214                 e->tree = new_tree_content(8);
1215                 e->versions[1].mode = S_IFDIR;
1216                 tree_content_set(e, slash1 + 1, sha1, mode, subtree);
1217         } else {
1218                 e->tree = subtree;
1219                 e->versions[1].mode = mode;
1220                 hashcpy(e->versions[1].sha1, sha1);
1221         }
1222         hashclr(root->versions[1].sha1);
1223         return 1;
1224 }
1225
1226 static int tree_content_remove(
1227         struct tree_entry *root,
1228         const char *p,
1229         struct tree_entry *backup_leaf)
1230 {
1231         struct tree_content *t = root->tree;
1232         const char *slash1;
1233         unsigned int i, n;
1234         struct tree_entry *e;
1235
1236         slash1 = strchr(p, '/');
1237         if (slash1)
1238                 n = slash1 - p;
1239         else
1240                 n = strlen(p);
1241
1242         for (i = 0; i < t->entry_count; i++) {
1243                 e = t->entries[i];
1244                 if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) {
1245                         if (!slash1 || !S_ISDIR(e->versions[1].mode))
1246                                 goto del_entry;
1247                         if (!e->tree)
1248                                 load_tree(e);
1249                         if (tree_content_remove(e, slash1 + 1, backup_leaf)) {
1250                                 for (n = 0; n < e->tree->entry_count; n++) {
1251                                         if (e->tree->entries[n]->versions[1].mode) {
1252                                                 hashclr(root->versions[1].sha1);
1253                                                 return 1;
1254                                         }
1255                                 }
1256                                 backup_leaf = NULL;
1257                                 goto del_entry;
1258                         }
1259                         return 0;
1260                 }
1261         }
1262         return 0;
1263
1264 del_entry:
1265         if (backup_leaf)
1266                 memcpy(backup_leaf, e, sizeof(*backup_leaf));
1267         else if (e->tree)
1268                 release_tree_content_recursive(e->tree);
1269         e->tree = NULL;
1270         e->versions[1].mode = 0;
1271         hashclr(e->versions[1].sha1);
1272         hashclr(root->versions[1].sha1);
1273         return 1;
1274 }
1275
1276 static int update_branch(struct branch *b)
1277 {
1278         static const char *msg = "fast-import";
1279         struct ref_lock *lock;
1280         unsigned char old_sha1[20];
1281
1282         if (read_ref(b->name, old_sha1))
1283                 hashclr(old_sha1);
1284         lock = lock_any_ref_for_update(b->name, old_sha1, 0);
1285         if (!lock)
1286                 return error("Unable to lock %s", b->name);
1287         if (!force_update && !is_null_sha1(old_sha1)) {
1288                 struct commit *old_cmit, *new_cmit;
1289
1290                 old_cmit = lookup_commit_reference_gently(old_sha1, 0);
1291                 new_cmit = lookup_commit_reference_gently(b->sha1, 0);
1292                 if (!old_cmit || !new_cmit) {
1293                         unlock_ref(lock);
1294                         return error("Branch %s is missing commits.", b->name);
1295                 }
1296
1297                 if (!in_merge_bases(old_cmit, &new_cmit, 1)) {
1298                         unlock_ref(lock);
1299                         warning("Not updating %s"
1300                                 " (new tip %s does not contain %s)",
1301                                 b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1));
1302                         return -1;
1303                 }
1304         }
1305         if (write_ref_sha1(lock, b->sha1, msg) < 0)
1306                 return error("Unable to update %s", b->name);
1307         return 0;
1308 }
1309
1310 static void dump_branches(void)
1311 {
1312         unsigned int i;
1313         struct branch *b;
1314
1315         for (i = 0; i < branch_table_sz; i++) {
1316                 for (b = branch_table[i]; b; b = b->table_next_branch)
1317                         failure |= update_branch(b);
1318         }
1319 }
1320
1321 static void dump_tags(void)
1322 {
1323         static const char *msg = "fast-import";
1324         struct tag *t;
1325         struct ref_lock *lock;
1326         char ref_name[PATH_MAX];
1327
1328         for (t = first_tag; t; t = t->next_tag) {
1329                 sprintf(ref_name, "tags/%s", t->name);
1330                 lock = lock_ref_sha1(ref_name, NULL);
1331                 if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0)
1332                         failure |= error("Unable to update %s", ref_name);
1333         }
1334 }
1335
1336 static void dump_marks_helper(FILE *f,
1337         uintmax_t base,
1338         struct mark_set *m)
1339 {
1340         uintmax_t k;
1341         if (m->shift) {
1342                 for (k = 0; k < 1024; k++) {
1343                         if (m->data.sets[k])
1344                                 dump_marks_helper(f, (base + k) << m->shift,
1345                                         m->data.sets[k]);
1346                 }
1347         } else {
1348                 for (k = 0; k < 1024; k++) {
1349                         if (m->data.marked[k])
1350                                 fprintf(f, ":%" PRIuMAX " %s\n", base + k,
1351                                         sha1_to_hex(m->data.marked[k]->sha1));
1352                 }
1353         }
1354 }
1355
1356 static void dump_marks(void)
1357 {
1358         static struct lock_file mark_lock;
1359         int mark_fd;
1360         FILE *f;
1361
1362         if (!mark_file)
1363                 return;
1364
1365         mark_fd = hold_lock_file_for_update(&mark_lock, mark_file, 0);
1366         if (mark_fd < 0) {
1367                 failure |= error("Unable to write marks file %s: %s",
1368                         mark_file, strerror(errno));
1369                 return;
1370         }
1371
1372         f = fdopen(mark_fd, "w");
1373         if (!f) {
1374                 rollback_lock_file(&mark_lock);
1375                 failure |= error("Unable to write marks file %s: %s",
1376                         mark_file, strerror(errno));
1377                 return;
1378         }
1379
1380         dump_marks_helper(f, 0, marks);
1381         fclose(f);
1382         if (commit_lock_file(&mark_lock))
1383                 failure |= error("Unable to write marks file %s: %s",
1384                         mark_file, strerror(errno));
1385 }
1386
1387 static void read_next_command(void)
1388 {
1389         read_line(&command_buf, stdin, '\n');
1390 }
1391
1392 static void cmd_mark(void)
1393 {
1394         if (!prefixcmp(command_buf.buf, "mark :")) {
1395                 next_mark = strtoumax(command_buf.buf + 6, NULL, 10);
1396                 read_next_command();
1397         }
1398         else
1399                 next_mark = 0;
1400 }
1401
1402 static void *cmd_data (size_t *size)
1403 {
1404         size_t length;
1405         char *buffer;
1406
1407         if (prefixcmp(command_buf.buf, "data "))
1408                 die("Expected 'data n' command, found: %s", command_buf.buf);
1409
1410         if (!prefixcmp(command_buf.buf + 5, "<<")) {
1411                 char *term = xstrdup(command_buf.buf + 5 + 2);
1412                 size_t sz = 8192, term_len = command_buf.len - 5 - 2;
1413                 length = 0;
1414                 buffer = xmalloc(sz);
1415                 for (;;) {
1416                         read_next_command();
1417                         if (command_buf.eof)
1418                                 die("EOF in data (terminator '%s' not found)", term);
1419                         if (term_len == command_buf.len
1420                                 && !strcmp(term, command_buf.buf))
1421                                 break;
1422                         if (sz < (length + command_buf.len)) {
1423                                 sz = sz * 3 / 2 + 16;
1424                                 if (sz < (length + command_buf.len))
1425                                         sz = length + command_buf.len;
1426                                 buffer = xrealloc(buffer, sz);
1427                         }
1428                         memcpy(buffer + length,
1429                                 command_buf.buf,
1430                                 command_buf.len - 1);
1431                         length += command_buf.len - 1;
1432                         buffer[length++] = '\n';
1433                 }
1434                 free(term);
1435         }
1436         else {
1437                 size_t n = 0;
1438                 length = strtoul(command_buf.buf + 5, NULL, 10);
1439                 buffer = xmalloc(length);
1440                 while (n < length) {
1441                         size_t s = fread(buffer + n, 1, length - n, stdin);
1442                         if (!s && feof(stdin))
1443                                 die("EOF in data (%lu bytes remaining)",
1444                                         (unsigned long)(length - n));
1445                         n += s;
1446                 }
1447         }
1448
1449         if (fgetc(stdin) != '\n')
1450                 die("An lf did not trail the binary data as expected.");
1451
1452         *size = length;
1453         return buffer;
1454 }
1455
1456 static int validate_raw_date(const char *src, char *result, int maxlen)
1457 {
1458         const char *orig_src = src;
1459         char *endp, sign;
1460
1461         strtoul(src, &endp, 10);
1462         if (endp == src || *endp != ' ')
1463                 return -1;
1464
1465         src = endp + 1;
1466         if (*src != '-' && *src != '+')
1467                 return -1;
1468         sign = *src;
1469
1470         strtoul(src + 1, &endp, 10);
1471         if (endp == src || *endp || (endp - orig_src) >= maxlen)
1472                 return -1;
1473
1474         strcpy(result, orig_src);
1475         return 0;
1476 }
1477
1478 static char *parse_ident(const char *buf)
1479 {
1480         const char *gt;
1481         size_t name_len;
1482         char *ident;
1483
1484         gt = strrchr(buf, '>');
1485         if (!gt)
1486                 die("Missing > in ident string: %s", buf);
1487         gt++;
1488         if (*gt != ' ')
1489                 die("Missing space after > in ident string: %s", buf);
1490         gt++;
1491         name_len = gt - buf;
1492         ident = xmalloc(name_len + 24);
1493         strncpy(ident, buf, name_len);
1494
1495         switch (whenspec) {
1496         case WHENSPEC_RAW:
1497                 if (validate_raw_date(gt, ident + name_len, 24) < 0)
1498                         die("Invalid raw date \"%s\" in ident: %s", gt, buf);
1499                 break;
1500         case WHENSPEC_RFC2822:
1501                 if (parse_date(gt, ident + name_len, 24) < 0)
1502                         die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf);
1503                 break;
1504         case WHENSPEC_NOW:
1505                 if (strcmp("now", gt))
1506                         die("Date in ident must be 'now': %s", buf);
1507                 datestamp(ident + name_len, 24);
1508                 break;
1509         }
1510
1511         return ident;
1512 }
1513
1514 static void cmd_new_blob(void)
1515 {
1516         size_t l;
1517         void *d;
1518
1519         read_next_command();
1520         cmd_mark();
1521         d = cmd_data(&l);
1522
1523         if (store_object(OBJ_BLOB, d, l, &last_blob, NULL, next_mark))
1524                 free(d);
1525 }
1526
1527 static void unload_one_branch(void)
1528 {
1529         while (cur_active_branches
1530                 && cur_active_branches >= max_active_branches) {
1531                 uintmax_t min_commit = ULONG_MAX;
1532                 struct branch *e, *l = NULL, *p = NULL;
1533
1534                 for (e = active_branches; e; e = e->active_next_branch) {
1535                         if (e->last_commit < min_commit) {
1536                                 p = l;
1537                                 min_commit = e->last_commit;
1538                         }
1539                         l = e;
1540                 }
1541
1542                 if (p) {
1543                         e = p->active_next_branch;
1544                         p->active_next_branch = e->active_next_branch;
1545                 } else {
1546                         e = active_branches;
1547                         active_branches = e->active_next_branch;
1548                 }
1549                 e->active = 0;
1550                 e->active_next_branch = NULL;
1551                 if (e->branch_tree.tree) {
1552                         release_tree_content_recursive(e->branch_tree.tree);
1553                         e->branch_tree.tree = NULL;
1554                 }
1555                 cur_active_branches--;
1556         }
1557 }
1558
1559 static void load_branch(struct branch *b)
1560 {
1561         load_tree(&b->branch_tree);
1562         if (!b->active) {
1563                 b->active = 1;
1564                 b->active_next_branch = active_branches;
1565                 active_branches = b;
1566                 cur_active_branches++;
1567                 branch_load_count++;
1568         }
1569 }
1570
1571 static void file_change_m(struct branch *b)
1572 {
1573         const char *p = command_buf.buf + 2;
1574         char *p_uq;
1575         const char *endp;
1576         struct object_entry *oe = oe;
1577         unsigned char sha1[20];
1578         uint16_t mode, inline_data = 0;
1579
1580         p = get_mode(p, &mode);
1581         if (!p)
1582                 die("Corrupt mode: %s", command_buf.buf);
1583         switch (mode) {
1584         case S_IFREG | 0644:
1585         case S_IFREG | 0755:
1586         case S_IFLNK:
1587         case 0644:
1588         case 0755:
1589                 /* ok */
1590                 break;
1591         default:
1592                 die("Corrupt mode: %s", command_buf.buf);
1593         }
1594
1595         if (*p == ':') {
1596                 char *x;
1597                 oe = find_mark(strtoumax(p + 1, &x, 10));
1598                 hashcpy(sha1, oe->sha1);
1599                 p = x;
1600         } else if (!prefixcmp(p, "inline")) {
1601                 inline_data = 1;
1602                 p += 6;
1603         } else {
1604                 if (get_sha1_hex(p, sha1))
1605                         die("Invalid SHA1: %s", command_buf.buf);
1606                 oe = find_object(sha1);
1607                 p += 40;
1608         }
1609         if (*p++ != ' ')
1610                 die("Missing space after SHA1: %s", command_buf.buf);
1611
1612         p_uq = unquote_c_style(p, &endp);
1613         if (p_uq) {
1614                 if (*endp)
1615                         die("Garbage after path in: %s", command_buf.buf);
1616                 p = p_uq;
1617         }
1618
1619         if (inline_data) {
1620                 size_t l;
1621                 void *d;
1622                 if (!p_uq)
1623                         p = p_uq = xstrdup(p);
1624                 read_next_command();
1625                 d = cmd_data(&l);
1626                 if (store_object(OBJ_BLOB, d, l, &last_blob, sha1, 0))
1627                         free(d);
1628         } else if (oe) {
1629                 if (oe->type != OBJ_BLOB)
1630                         die("Not a blob (actually a %s): %s",
1631                                 command_buf.buf, typename(oe->type));
1632         } else {
1633                 enum object_type type = sha1_object_info(sha1, NULL);
1634                 if (type < 0)
1635                         die("Blob not found: %s", command_buf.buf);
1636                 if (type != OBJ_BLOB)
1637                         die("Not a blob (actually a %s): %s",
1638                             typename(type), command_buf.buf);
1639         }
1640
1641         tree_content_set(&b->branch_tree, p, sha1, S_IFREG | mode, NULL);
1642         free(p_uq);
1643 }
1644
1645 static void file_change_d(struct branch *b)
1646 {
1647         const char *p = command_buf.buf + 2;
1648         char *p_uq;
1649         const char *endp;
1650
1651         p_uq = unquote_c_style(p, &endp);
1652         if (p_uq) {
1653                 if (*endp)
1654                         die("Garbage after path in: %s", command_buf.buf);
1655                 p = p_uq;
1656         }
1657         tree_content_remove(&b->branch_tree, p, NULL);
1658         free(p_uq);
1659 }
1660
1661 static void file_change_r(struct branch *b)
1662 {
1663         const char *s, *d;
1664         char *s_uq, *d_uq;
1665         const char *endp;
1666         struct tree_entry leaf;
1667
1668         s = command_buf.buf + 2;
1669         s_uq = unquote_c_style(s, &endp);
1670         if (s_uq) {
1671                 if (*endp != ' ')
1672                         die("Missing space after source: %s", command_buf.buf);
1673         }
1674         else {
1675                 endp = strchr(s, ' ');
1676                 if (!endp)
1677                         die("Missing space after source: %s", command_buf.buf);
1678                 s_uq = xmalloc(endp - s + 1);
1679                 memcpy(s_uq, s, endp - s);
1680                 s_uq[endp - s] = 0;
1681         }
1682         s = s_uq;
1683
1684         endp++;
1685         if (!*endp)
1686                 die("Missing dest: %s", command_buf.buf);
1687
1688         d = endp;
1689         d_uq = unquote_c_style(d, &endp);
1690         if (d_uq) {
1691                 if (*endp)
1692                         die("Garbage after dest in: %s", command_buf.buf);
1693                 d = d_uq;
1694         }
1695
1696         memset(&leaf, 0, sizeof(leaf));
1697         tree_content_remove(&b->branch_tree, s, &leaf);
1698         if (!leaf.versions[1].mode)
1699                 die("Path %s not in branch", s);
1700         tree_content_set(&b->branch_tree, d,
1701                 leaf.versions[1].sha1,
1702                 leaf.versions[1].mode,
1703                 leaf.tree);
1704
1705         free(s_uq);
1706         free(d_uq);
1707 }
1708
1709 static void file_change_deleteall(struct branch *b)
1710 {
1711         release_tree_content_recursive(b->branch_tree.tree);
1712         hashclr(b->branch_tree.versions[0].sha1);
1713         hashclr(b->branch_tree.versions[1].sha1);
1714         load_tree(&b->branch_tree);
1715 }
1716
1717 static void cmd_from_commit(struct branch *b, char *buf, unsigned long size)
1718 {
1719         if (!buf || size < 46)
1720                 die("Not a valid commit: %s", sha1_to_hex(b->sha1));
1721         if (memcmp("tree ", buf, 5)
1722                 || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1))
1723                 die("The commit %s is corrupt", sha1_to_hex(b->sha1));
1724         hashcpy(b->branch_tree.versions[0].sha1,
1725                 b->branch_tree.versions[1].sha1);
1726 }
1727
1728 static void cmd_from_existing(struct branch *b)
1729 {
1730         if (is_null_sha1(b->sha1)) {
1731                 hashclr(b->branch_tree.versions[0].sha1);
1732                 hashclr(b->branch_tree.versions[1].sha1);
1733         } else {
1734                 unsigned long size;
1735                 char *buf;
1736
1737                 buf = read_object_with_reference(b->sha1,
1738                         commit_type, &size, b->sha1);
1739                 cmd_from_commit(b, buf, size);
1740                 free(buf);
1741         }
1742 }
1743
1744 static void cmd_from(struct branch *b)
1745 {
1746         const char *from;
1747         struct branch *s;
1748
1749         if (prefixcmp(command_buf.buf, "from "))
1750                 return;
1751
1752         if (b->branch_tree.tree) {
1753                 release_tree_content_recursive(b->branch_tree.tree);
1754                 b->branch_tree.tree = NULL;
1755         }
1756
1757         from = strchr(command_buf.buf, ' ') + 1;
1758         s = lookup_branch(from);
1759         if (b == s)
1760                 die("Can't create a branch from itself: %s", b->name);
1761         else if (s) {
1762                 unsigned char *t = s->branch_tree.versions[1].sha1;
1763                 hashcpy(b->sha1, s->sha1);
1764                 hashcpy(b->branch_tree.versions[0].sha1, t);
1765                 hashcpy(b->branch_tree.versions[1].sha1, t);
1766         } else if (*from == ':') {
1767                 uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1768                 struct object_entry *oe = find_mark(idnum);
1769                 if (oe->type != OBJ_COMMIT)
1770                         die("Mark :%" PRIuMAX " not a commit", idnum);
1771                 hashcpy(b->sha1, oe->sha1);
1772                 if (oe->pack_id != MAX_PACK_ID) {
1773                         unsigned long size;
1774                         char *buf = gfi_unpack_entry(oe, &size);
1775                         cmd_from_commit(b, buf, size);
1776                         free(buf);
1777                 } else
1778                         cmd_from_existing(b);
1779         } else if (!get_sha1(from, b->sha1))
1780                 cmd_from_existing(b);
1781         else
1782                 die("Invalid ref name or SHA1 expression: %s", from);
1783
1784         read_next_command();
1785 }
1786
1787 static struct hash_list *cmd_merge(unsigned int *count)
1788 {
1789         struct hash_list *list = NULL, *n, *e = e;
1790         const char *from;
1791         struct branch *s;
1792
1793         *count = 0;
1794         while (!prefixcmp(command_buf.buf, "merge ")) {
1795                 from = strchr(command_buf.buf, ' ') + 1;
1796                 n = xmalloc(sizeof(*n));
1797                 s = lookup_branch(from);
1798                 if (s)
1799                         hashcpy(n->sha1, s->sha1);
1800                 else if (*from == ':') {
1801                         uintmax_t idnum = strtoumax(from + 1, NULL, 10);
1802                         struct object_entry *oe = find_mark(idnum);
1803                         if (oe->type != OBJ_COMMIT)
1804                                 die("Mark :%" PRIuMAX " not a commit", idnum);
1805                         hashcpy(n->sha1, oe->sha1);
1806                 } else if (!get_sha1(from, n->sha1)) {
1807                         unsigned long size;
1808                         char *buf = read_object_with_reference(n->sha1,
1809                                 commit_type, &size, n->sha1);
1810                         if (!buf || size < 46)
1811                                 die("Not a valid commit: %s", from);
1812                         free(buf);
1813                 } else
1814                         die("Invalid ref name or SHA1 expression: %s", from);
1815
1816                 n->next = NULL;
1817                 if (list)
1818                         e->next = n;
1819                 else
1820                         list = n;
1821                 e = n;
1822                 (*count)++;
1823                 read_next_command();
1824         }
1825         return list;
1826 }
1827
1828 static void cmd_new_commit(void)
1829 {
1830         struct branch *b;
1831         void *msg;
1832         size_t msglen;
1833         char *sp;
1834         char *author = NULL;
1835         char *committer = NULL;
1836         struct hash_list *merge_list = NULL;
1837         unsigned int merge_count;
1838
1839         /* Obtain the branch name from the rest of our command */
1840         sp = strchr(command_buf.buf, ' ') + 1;
1841         b = lookup_branch(sp);
1842         if (!b)
1843                 b = new_branch(sp);
1844
1845         read_next_command();
1846         cmd_mark();
1847         if (!prefixcmp(command_buf.buf, "author ")) {
1848                 author = parse_ident(command_buf.buf + 7);
1849                 read_next_command();
1850         }
1851         if (!prefixcmp(command_buf.buf, "committer ")) {
1852                 committer = parse_ident(command_buf.buf + 10);
1853                 read_next_command();
1854         }
1855         if (!committer)
1856                 die("Expected committer but didn't get one");
1857         msg = cmd_data(&msglen);
1858         read_next_command();
1859         cmd_from(b);
1860         merge_list = cmd_merge(&merge_count);
1861
1862         /* ensure the branch is active/loaded */
1863         if (!b->branch_tree.tree || !max_active_branches) {
1864                 unload_one_branch();
1865                 load_branch(b);
1866         }
1867
1868         /* file_change* */
1869         for (;;) {
1870                 if (1 == command_buf.len)
1871                         break;
1872                 else if (!prefixcmp(command_buf.buf, "M "))
1873                         file_change_m(b);
1874                 else if (!prefixcmp(command_buf.buf, "D "))
1875                         file_change_d(b);
1876                 else if (!prefixcmp(command_buf.buf, "R "))
1877                         file_change_r(b);
1878                 else if (!strcmp("deleteall", command_buf.buf))
1879                         file_change_deleteall(b);
1880                 else
1881                         die("Unsupported file_change: %s", command_buf.buf);
1882                 read_next_command();
1883         }
1884
1885         /* build the tree and the commit */
1886         store_tree(&b->branch_tree);
1887         hashcpy(b->branch_tree.versions[0].sha1,
1888                 b->branch_tree.versions[1].sha1);
1889         size_dbuf(&new_data, 114 + msglen
1890                 + merge_count * 49
1891                 + (author
1892                         ? strlen(author) + strlen(committer)
1893                         : 2 * strlen(committer)));
1894         sp = new_data.buffer;
1895         sp += sprintf(sp, "tree %s\n",
1896                 sha1_to_hex(b->branch_tree.versions[1].sha1));
1897         if (!is_null_sha1(b->sha1))
1898                 sp += sprintf(sp, "parent %s\n", sha1_to_hex(b->sha1));
1899         while (merge_list) {
1900                 struct hash_list *next = merge_list->next;
1901                 sp += sprintf(sp, "parent %s\n", sha1_to_hex(merge_list->sha1));
1902                 free(merge_list);
1903                 merge_list = next;
1904         }
1905         sp += sprintf(sp, "author %s\n", author ? author : committer);
1906         sp += sprintf(sp, "committer %s\n", committer);
1907         *sp++ = '\n';
1908         memcpy(sp, msg, msglen);
1909         sp += msglen;
1910         free(author);
1911         free(committer);
1912         free(msg);
1913
1914         if (!store_object(OBJ_COMMIT,
1915                 new_data.buffer, sp - (char*)new_data.buffer,
1916                 NULL, b->sha1, next_mark))
1917                 b->pack_id = pack_id;
1918         b->last_commit = object_count_by_type[OBJ_COMMIT];
1919 }
1920
1921 static void cmd_new_tag(void)
1922 {
1923         char *sp;
1924         const char *from;
1925         char *tagger;
1926         struct branch *s;
1927         void *msg;
1928         size_t msglen;
1929         struct tag *t;
1930         uintmax_t from_mark = 0;
1931         unsigned char sha1[20];
1932
1933         /* Obtain the new tag name from the rest of our command */
1934         sp = strchr(command_buf.buf, ' ') + 1;
1935         t = pool_alloc(sizeof(struct tag));
1936         t->next_tag = NULL;
1937         t->name = pool_strdup(sp);
1938         if (last_tag)
1939                 last_tag->next_tag = t;
1940         else
1941                 first_tag = t;
1942         last_tag = t;
1943         read_next_command();
1944
1945         /* from ... */
1946         if (prefixcmp(command_buf.buf, "from "))
1947                 die("Expected from command, got %s", command_buf.buf);
1948         from = strchr(command_buf.buf, ' ') + 1;
1949         s = lookup_branch(from);
1950         if (s) {
1951                 hashcpy(sha1, s->sha1);
1952         } else if (*from == ':') {
1953                 struct object_entry *oe;
1954                 from_mark = strtoumax(from + 1, NULL, 10);
1955                 oe = find_mark(from_mark);
1956                 if (oe->type != OBJ_COMMIT)
1957                         die("Mark :%" PRIuMAX " not a commit", from_mark);
1958                 hashcpy(sha1, oe->sha1);
1959         } else if (!get_sha1(from, sha1)) {
1960                 unsigned long size;
1961                 char *buf;
1962
1963                 buf = read_object_with_reference(sha1,
1964                         commit_type, &size, sha1);
1965                 if (!buf || size < 46)
1966                         die("Not a valid commit: %s", from);
1967                 free(buf);
1968         } else
1969                 die("Invalid ref name or SHA1 expression: %s", from);
1970         read_next_command();
1971
1972         /* tagger ... */
1973         if (prefixcmp(command_buf.buf, "tagger "))
1974                 die("Expected tagger command, got %s", command_buf.buf);
1975         tagger = parse_ident(command_buf.buf + 7);
1976
1977         /* tag payload/message */
1978         read_next_command();
1979         msg = cmd_data(&msglen);
1980
1981         /* build the tag object */
1982         size_dbuf(&new_data, 67+strlen(t->name)+strlen(tagger)+msglen);
1983         sp = new_data.buffer;
1984         sp += sprintf(sp, "object %s\n", sha1_to_hex(sha1));
1985         sp += sprintf(sp, "type %s\n", commit_type);
1986         sp += sprintf(sp, "tag %s\n", t->name);
1987         sp += sprintf(sp, "tagger %s\n", tagger);
1988         *sp++ = '\n';
1989         memcpy(sp, msg, msglen);
1990         sp += msglen;
1991         free(tagger);
1992         free(msg);
1993
1994         if (store_object(OBJ_TAG, new_data.buffer,
1995                 sp - (char*)new_data.buffer,
1996                 NULL, t->sha1, 0))
1997                 t->pack_id = MAX_PACK_ID;
1998         else
1999                 t->pack_id = pack_id;
2000 }
2001
2002 static void cmd_reset_branch(void)
2003 {
2004         struct branch *b;
2005         char *sp;
2006
2007         /* Obtain the branch name from the rest of our command */
2008         sp = strchr(command_buf.buf, ' ') + 1;
2009         b = lookup_branch(sp);
2010         if (b) {
2011                 hashclr(b->sha1);
2012                 hashclr(b->branch_tree.versions[0].sha1);
2013                 hashclr(b->branch_tree.versions[1].sha1);
2014                 if (b->branch_tree.tree) {
2015                         release_tree_content_recursive(b->branch_tree.tree);
2016                         b->branch_tree.tree = NULL;
2017                 }
2018         }
2019         else
2020                 b = new_branch(sp);
2021         read_next_command();
2022         cmd_from(b);
2023 }
2024
2025 static void cmd_checkpoint(void)
2026 {
2027         if (object_count) {
2028                 cycle_packfile();
2029                 dump_branches();
2030                 dump_tags();
2031                 dump_marks();
2032         }
2033         read_next_command();
2034 }
2035
2036 static void import_marks(const char *input_file)
2037 {
2038         char line[512];
2039         FILE *f = fopen(input_file, "r");
2040         if (!f)
2041                 die("cannot read %s: %s", input_file, strerror(errno));
2042         while (fgets(line, sizeof(line), f)) {
2043                 uintmax_t mark;
2044                 char *end;
2045                 unsigned char sha1[20];
2046                 struct object_entry *e;
2047
2048                 end = strchr(line, '\n');
2049                 if (line[0] != ':' || !end)
2050                         die("corrupt mark line: %s", line);
2051                 *end = 0;
2052                 mark = strtoumax(line + 1, &end, 10);
2053                 if (!mark || end == line + 1
2054                         || *end != ' ' || get_sha1(end + 1, sha1))
2055                         die("corrupt mark line: %s", line);
2056                 e = find_object(sha1);
2057                 if (!e) {
2058                         enum object_type type = sha1_object_info(sha1, NULL);
2059                         if (type < 0)
2060                                 die("object not found: %s", sha1_to_hex(sha1));
2061                         e = insert_object(sha1);
2062                         e->type = type;
2063                         e->pack_id = MAX_PACK_ID;
2064                         e->offset = 1; /* just not zero! */
2065                 }
2066                 insert_mark(mark, e);
2067         }
2068         fclose(f);
2069 }
2070
2071 static const char fast_import_usage[] =
2072 "git-fast-import [--date-format=f] [--max-pack-size=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file]";
2073
2074 int main(int argc, const char **argv)
2075 {
2076         int i, show_stats = 1;
2077
2078         git_config(git_default_config);
2079         alloc_objects(object_entry_alloc);
2080         strbuf_init(&command_buf);
2081         atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
2082         branch_table = xcalloc(branch_table_sz, sizeof(struct branch*));
2083         avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*));
2084         marks = pool_calloc(1, sizeof(struct mark_set));
2085
2086         for (i = 1; i < argc; i++) {
2087                 const char *a = argv[i];
2088
2089                 if (*a != '-' || !strcmp(a, "--"))
2090                         break;
2091                 else if (!prefixcmp(a, "--date-format=")) {
2092                         const char *fmt = a + 14;
2093                         if (!strcmp(fmt, "raw"))
2094                                 whenspec = WHENSPEC_RAW;
2095                         else if (!strcmp(fmt, "rfc2822"))
2096                                 whenspec = WHENSPEC_RFC2822;
2097                         else if (!strcmp(fmt, "now"))
2098                                 whenspec = WHENSPEC_NOW;
2099                         else
2100                                 die("unknown --date-format argument %s", fmt);
2101                 }
2102                 else if (!prefixcmp(a, "--max-pack-size="))
2103                         max_packsize = strtoumax(a + 16, NULL, 0) * 1024 * 1024;
2104                 else if (!prefixcmp(a, "--depth="))
2105                         max_depth = strtoul(a + 8, NULL, 0);
2106                 else if (!prefixcmp(a, "--active-branches="))
2107                         max_active_branches = strtoul(a + 18, NULL, 0);
2108                 else if (!prefixcmp(a, "--import-marks="))
2109                         import_marks(a + 15);
2110                 else if (!prefixcmp(a, "--export-marks="))
2111                         mark_file = a + 15;
2112                 else if (!prefixcmp(a, "--export-pack-edges=")) {
2113                         if (pack_edges)
2114                                 fclose(pack_edges);
2115                         pack_edges = fopen(a + 20, "a");
2116                         if (!pack_edges)
2117                                 die("Cannot open %s: %s", a + 20, strerror(errno));
2118                 } else if (!strcmp(a, "--force"))
2119                         force_update = 1;
2120                 else if (!strcmp(a, "--quiet"))
2121                         show_stats = 0;
2122                 else if (!strcmp(a, "--stats"))
2123                         show_stats = 1;
2124                 else
2125                         die("unknown option %s", a);
2126         }
2127         if (i != argc)
2128                 usage(fast_import_usage);
2129
2130         prepare_packed_git();
2131         start_packfile();
2132         for (;;) {
2133                 read_next_command();
2134                 if (command_buf.eof)
2135                         break;
2136                 else if (!strcmp("blob", command_buf.buf))
2137                         cmd_new_blob();
2138                 else if (!prefixcmp(command_buf.buf, "commit "))
2139                         cmd_new_commit();
2140                 else if (!prefixcmp(command_buf.buf, "tag "))
2141                         cmd_new_tag();
2142                 else if (!prefixcmp(command_buf.buf, "reset "))
2143                         cmd_reset_branch();
2144                 else if (!strcmp("checkpoint", command_buf.buf))
2145                         cmd_checkpoint();
2146                 else
2147                         die("Unsupported command: %s", command_buf.buf);
2148         }
2149         end_packfile();
2150
2151         dump_branches();
2152         dump_tags();
2153         unkeep_all_packs();
2154         dump_marks();
2155
2156         if (pack_edges)
2157                 fclose(pack_edges);
2158
2159         if (show_stats) {
2160                 uintmax_t total_count = 0, duplicate_count = 0;
2161                 for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++)
2162                         total_count += object_count_by_type[i];
2163                 for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++)
2164                         duplicate_count += duplicate_count_by_type[i];
2165
2166                 fprintf(stderr, "%s statistics:\n", argv[0]);
2167                 fprintf(stderr, "---------------------------------------------------------------------\n");
2168                 fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
2169                 fprintf(stderr, "Total objects:   %10" PRIuMAX " (%10" PRIuMAX " duplicates                  )\n", total_count, duplicate_count);
2170                 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]);
2171                 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]);
2172                 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]);
2173                 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]);
2174                 fprintf(stderr, "Total branches:  %10lu (%10lu loads     )\n", branch_count, branch_load_count);
2175                 fprintf(stderr, "      marks:     %10" PRIuMAX " (%10" PRIuMAX " unique    )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
2176                 fprintf(stderr, "      atoms:     %10u\n", atom_cnt);
2177                 fprintf(stderr, "Memory total:    %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024);
2178                 fprintf(stderr, "       pools:    %10lu KiB\n", (unsigned long)(total_allocd/1024));
2179                 fprintf(stderr, "     objects:    %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
2180                 fprintf(stderr, "---------------------------------------------------------------------\n");
2181                 pack_report();
2182                 fprintf(stderr, "---------------------------------------------------------------------\n");
2183                 fprintf(stderr, "\n");
2184         }
2185
2186         return failure ? 1 : 0;
2187 }