fast-import.con commit Merge branch 'jc/receive-pack-hook-doc' (e49ac11)
   1/*
   2(See Documentation/git-fast-import.txt for maintained documentation.)
   3Format of STDIN stream:
   4
   5  stream ::= cmd*;
   6
   7  cmd ::= new_blob
   8        | new_commit
   9        | new_tag
  10        | reset_branch
  11        | checkpoint
  12        | progress
  13        ;
  14
  15  new_blob ::= 'blob' lf
  16    mark?
  17    file_content;
  18  file_content ::= data;
  19
  20  new_commit ::= 'commit' sp ref_str lf
  21    mark?
  22    ('author' (sp name)? sp '<' email '>' sp when lf)?
  23    'committer' (sp name)? sp '<' email '>' sp when lf
  24    commit_msg
  25    ('from' sp commit-ish lf)?
  26    ('merge' sp commit-ish lf)*
  27    (file_change | ls)*
  28    lf?;
  29  commit_msg ::= data;
  30
  31  ls ::= 'ls' sp '"' quoted(path) '"' lf;
  32
  33  file_change ::= file_clr
  34    | file_del
  35    | file_rnm
  36    | file_cpy
  37    | file_obm
  38    | file_inm;
  39  file_clr ::= 'deleteall' lf;
  40  file_del ::= 'D' sp path_str lf;
  41  file_rnm ::= 'R' sp path_str sp path_str lf;
  42  file_cpy ::= 'C' sp path_str sp path_str lf;
  43  file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf;
  44  file_inm ::= 'M' sp mode sp 'inline' sp path_str lf
  45    data;
  46  note_obm ::= 'N' sp (hexsha1 | idnum) sp commit-ish lf;
  47  note_inm ::= 'N' sp 'inline' sp commit-ish lf
  48    data;
  49
  50  new_tag ::= 'tag' sp tag_str lf
  51    'from' sp commit-ish lf
  52    ('tagger' (sp name)? sp '<' email '>' sp when lf)?
  53    tag_msg;
  54  tag_msg ::= data;
  55
  56  reset_branch ::= 'reset' sp ref_str lf
  57    ('from' sp commit-ish lf)?
  58    lf?;
  59
  60  checkpoint ::= 'checkpoint' lf
  61    lf?;
  62
  63  progress ::= 'progress' sp not_lf* lf
  64    lf?;
  65
  66     # note: the first idnum in a stream should be 1 and subsequent
  67     # idnums should not have gaps between values as this will cause
  68     # the stream parser to reserve space for the gapped values.  An
  69     # idnum can be updated in the future to a new object by issuing
  70     # a new mark directive with the old idnum.
  71     #
  72  mark ::= 'mark' sp idnum lf;
  73  data ::= (delimited_data | exact_data)
  74    lf?;
  75
  76    # note: delim may be any string but must not contain lf.
  77    # data_line may contain any data but must not be exactly
  78    # delim.
  79  delimited_data ::= 'data' sp '<<' delim lf
  80    (data_line lf)*
  81    delim lf;
  82
  83     # note: declen indicates the length of binary_data in bytes.
  84     # declen does not include the lf preceding the binary data.
  85     #
  86  exact_data ::= 'data' sp declen lf
  87    binary_data;
  88
  89     # note: quoted strings are C-style quoting supporting \c for
  90     # common escapes of 'c' (e..g \n, \t, \\, \") or \nnn where nnn
  91     # is the signed byte value in octal.  Note that the only
  92     # characters which must actually be escaped to protect the
  93     # stream formatting is: \, " and LF.  Otherwise these values
  94     # are UTF8.
  95     #
  96  commit-ish  ::= (ref_str | hexsha1 | sha1exp_str | idnum);
  97  ref_str     ::= ref;
  98  sha1exp_str ::= sha1exp;
  99  tag_str     ::= tag;
 100  path_str    ::= path    | '"' quoted(path)    '"' ;
 101  mode        ::= '100644' | '644'
 102                | '100755' | '755'
 103                | '120000'
 104                ;
 105
 106  declen ::= # unsigned 32 bit value, ascii base10 notation;
 107  bigint ::= # unsigned integer value, ascii base10 notation;
 108  binary_data ::= # file content, not interpreted;
 109
 110  when         ::= raw_when | rfc2822_when;
 111  raw_when     ::= ts sp tz;
 112  rfc2822_when ::= # Valid RFC 2822 date and time;
 113
 114  sp ::= # ASCII space character;
 115  lf ::= # ASCII newline (LF) character;
 116
 117     # note: a colon (':') must precede the numerical value assigned to
 118     # an idnum.  This is to distinguish it from a ref or tag name as
 119     # GIT does not permit ':' in ref or tag strings.
 120     #
 121  idnum   ::= ':' bigint;
 122  path    ::= # GIT style file path, e.g. "a/b/c";
 123  ref     ::= # GIT ref name, e.g. "refs/heads/MOZ_GECKO_EXPERIMENT";
 124  tag     ::= # GIT tag name, e.g. "FIREFOX_1_5";
 125  sha1exp ::= # Any valid GIT SHA1 expression;
 126  hexsha1 ::= # SHA1 in hexadecimal format;
 127
 128     # note: name and email are UTF8 strings, however name must not
 129     # contain '<' or lf and email must not contain any of the
 130     # following: '<', '>', lf.
 131     #
 132  name  ::= # valid GIT author/committer name;
 133  email ::= # valid GIT author/committer email;
 134  ts    ::= # time since the epoch in seconds, ascii base10 notation;
 135  tz    ::= # GIT style timezone;
 136
 137     # note: comments, get-mark, ls-tree, and cat-blob requests may
 138     # appear anywhere in the input, except within a data command. Any
 139     # form of the data command always escapes the related input from
 140     # comment processing.
 141     #
 142     # In case it is not clear, the '#' that starts the comment
 143     # must be the first character on that line (an lf
 144     # preceded it).
 145     #
 146
 147  get_mark ::= 'get-mark' sp idnum lf;
 148  cat_blob ::= 'cat-blob' sp (hexsha1 | idnum) lf;
 149  ls_tree  ::= 'ls' sp (hexsha1 | idnum) sp path_str lf;
 150
 151  comment ::= '#' not_lf* lf;
 152  not_lf  ::= # Any byte that is not ASCII newline (LF);
 153*/
 154
 155#include "builtin.h"
 156#include "cache.h"
 157#include "config.h"
 158#include "lockfile.h"
 159#include "object.h"
 160#include "blob.h"
 161#include "tree.h"
 162#include "commit.h"
 163#include "delta.h"
 164#include "pack.h"
 165#include "refs.h"
 166#include "csum-file.h"
 167#include "quote.h"
 168#include "dir.h"
 169#include "run-command.h"
 170#include "packfile.h"
 171
 172#define PACK_ID_BITS 16
 173#define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
 174#define DEPTH_BITS 13
 175#define MAX_DEPTH ((1<<DEPTH_BITS)-1)
 176
 177/*
 178 * We abuse the setuid bit on directories to mean "do not delta".
 179 */
 180#define NO_DELTA S_ISUID
 181
 182struct object_entry {
 183        struct pack_idx_entry idx;
 184        struct object_entry *next;
 185        uint32_t type : TYPE_BITS,
 186                pack_id : PACK_ID_BITS,
 187                depth : DEPTH_BITS;
 188};
 189
 190struct object_entry_pool {
 191        struct object_entry_pool *next_pool;
 192        struct object_entry *next_free;
 193        struct object_entry *end;
 194        struct object_entry entries[FLEX_ARRAY]; /* more */
 195};
 196
 197struct mark_set {
 198        union {
 199                struct object_entry *marked[1024];
 200                struct mark_set *sets[1024];
 201        } data;
 202        unsigned int shift;
 203};
 204
 205struct last_object {
 206        struct strbuf data;
 207        off_t offset;
 208        unsigned int depth;
 209        unsigned no_swap : 1;
 210};
 211
 212struct mem_pool {
 213        struct mem_pool *next_pool;
 214        char *next_free;
 215        char *end;
 216        uintmax_t space[FLEX_ARRAY]; /* more */
 217};
 218
 219struct atom_str {
 220        struct atom_str *next_atom;
 221        unsigned short str_len;
 222        char str_dat[FLEX_ARRAY]; /* more */
 223};
 224
 225struct tree_content;
 226struct tree_entry {
 227        struct tree_content *tree;
 228        struct atom_str *name;
 229        struct tree_entry_ms {
 230                uint16_t mode;
 231                struct object_id oid;
 232        } versions[2];
 233};
 234
 235struct tree_content {
 236        unsigned int entry_capacity; /* must match avail_tree_content */
 237        unsigned int entry_count;
 238        unsigned int delta_depth;
 239        struct tree_entry *entries[FLEX_ARRAY]; /* more */
 240};
 241
 242struct avail_tree_content {
 243        unsigned int entry_capacity; /* must match tree_content */
 244        struct avail_tree_content *next_avail;
 245};
 246
 247struct branch {
 248        struct branch *table_next_branch;
 249        struct branch *active_next_branch;
 250        const char *name;
 251        struct tree_entry branch_tree;
 252        uintmax_t last_commit;
 253        uintmax_t num_notes;
 254        unsigned active : 1;
 255        unsigned delete : 1;
 256        unsigned pack_id : PACK_ID_BITS;
 257        struct object_id oid;
 258};
 259
 260struct tag {
 261        struct tag *next_tag;
 262        const char *name;
 263        unsigned int pack_id;
 264        struct object_id oid;
 265};
 266
 267struct hash_list {
 268        struct hash_list *next;
 269        struct object_id oid;
 270};
 271
 272typedef enum {
 273        WHENSPEC_RAW = 1,
 274        WHENSPEC_RFC2822,
 275        WHENSPEC_NOW
 276} whenspec_type;
 277
 278struct recent_command {
 279        struct recent_command *prev;
 280        struct recent_command *next;
 281        char *buf;
 282};
 283
 284/* Configured limits on output */
 285static unsigned long max_depth = 50;
 286static off_t max_packsize;
 287static int unpack_limit = 100;
 288static int force_update;
 289
 290/* Stats and misc. counters */
 291static uintmax_t alloc_count;
 292static uintmax_t marks_set_count;
 293static uintmax_t object_count_by_type[1 << TYPE_BITS];
 294static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
 295static uintmax_t delta_count_by_type[1 << TYPE_BITS];
 296static uintmax_t delta_count_attempts_by_type[1 << TYPE_BITS];
 297static unsigned long object_count;
 298static unsigned long branch_count;
 299static unsigned long branch_load_count;
 300static int failure;
 301static FILE *pack_edges;
 302static unsigned int show_stats = 1;
 303static int global_argc;
 304static const char **global_argv;
 305
 306/* Memory pools */
 307static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
 308static size_t total_allocd;
 309static struct mem_pool *mem_pool;
 310
 311/* Atom management */
 312static unsigned int atom_table_sz = 4451;
 313static unsigned int atom_cnt;
 314static struct atom_str **atom_table;
 315
 316/* The .pack file being generated */
 317static struct pack_idx_option pack_idx_opts;
 318static unsigned int pack_id;
 319static struct sha1file *pack_file;
 320static struct packed_git *pack_data;
 321static struct packed_git **all_packs;
 322static off_t pack_size;
 323
 324/* Table of objects we've written. */
 325static unsigned int object_entry_alloc = 5000;
 326static struct object_entry_pool *blocks;
 327static struct object_entry *object_table[1 << 16];
 328static struct mark_set *marks;
 329static const char *export_marks_file;
 330static const char *import_marks_file;
 331static int import_marks_file_from_stream;
 332static int import_marks_file_ignore_missing;
 333static int import_marks_file_done;
 334static int relative_marks_paths;
 335
 336/* Our last blob */
 337static struct last_object last_blob = { STRBUF_INIT, 0, 0, 0 };
 338
 339/* Tree management */
 340static unsigned int tree_entry_alloc = 1000;
 341static void *avail_tree_entry;
 342static unsigned int avail_tree_table_sz = 100;
 343static struct avail_tree_content **avail_tree_table;
 344static struct strbuf old_tree = STRBUF_INIT;
 345static struct strbuf new_tree = STRBUF_INIT;
 346
 347/* Branch data */
 348static unsigned long max_active_branches = 5;
 349static unsigned long cur_active_branches;
 350static unsigned long branch_table_sz = 1039;
 351static struct branch **branch_table;
 352static struct branch *active_branches;
 353
 354/* Tag data */
 355static struct tag *first_tag;
 356static struct tag *last_tag;
 357
 358/* Input stream parsing */
 359static whenspec_type whenspec = WHENSPEC_RAW;
 360static struct strbuf command_buf = STRBUF_INIT;
 361static int unread_command_buf;
 362static struct recent_command cmd_hist = {&cmd_hist, &cmd_hist, NULL};
 363static struct recent_command *cmd_tail = &cmd_hist;
 364static struct recent_command *rc_free;
 365static unsigned int cmd_save = 100;
 366static uintmax_t next_mark;
 367static struct strbuf new_data = STRBUF_INIT;
 368static int seen_data_command;
 369static int require_explicit_termination;
 370
 371/* Signal handling */
 372static volatile sig_atomic_t checkpoint_requested;
 373
 374/* Where to write output of cat-blob commands */
 375static int cat_blob_fd = STDOUT_FILENO;
 376
 377static void parse_argv(void);
 378static void parse_get_mark(const char *p);
 379static void parse_cat_blob(const char *p);
 380static void parse_ls(const char *p, struct branch *b);
 381
 382static void write_branch_report(FILE *rpt, struct branch *b)
 383{
 384        fprintf(rpt, "%s:\n", b->name);
 385
 386        fprintf(rpt, "  status      :");
 387        if (b->active)
 388                fputs(" active", rpt);
 389        if (b->branch_tree.tree)
 390                fputs(" loaded", rpt);
 391        if (is_null_oid(&b->branch_tree.versions[1].oid))
 392                fputs(" dirty", rpt);
 393        fputc('\n', rpt);
 394
 395        fprintf(rpt, "  tip commit  : %s\n", oid_to_hex(&b->oid));
 396        fprintf(rpt, "  old tree    : %s\n",
 397                oid_to_hex(&b->branch_tree.versions[0].oid));
 398        fprintf(rpt, "  cur tree    : %s\n",
 399                oid_to_hex(&b->branch_tree.versions[1].oid));
 400        fprintf(rpt, "  commit clock: %" PRIuMAX "\n", b->last_commit);
 401
 402        fputs("  last pack   : ", rpt);
 403        if (b->pack_id < MAX_PACK_ID)
 404                fprintf(rpt, "%u", b->pack_id);
 405        fputc('\n', rpt);
 406
 407        fputc('\n', rpt);
 408}
 409
 410static void dump_marks_helper(FILE *, uintmax_t, struct mark_set *);
 411
 412static void write_crash_report(const char *err)
 413{
 414        char *loc = git_pathdup("fast_import_crash_%"PRIuMAX, (uintmax_t) getpid());
 415        FILE *rpt = fopen(loc, "w");
 416        struct branch *b;
 417        unsigned long lu;
 418        struct recent_command *rc;
 419
 420        if (!rpt) {
 421                error_errno("can't write crash report %s", loc);
 422                free(loc);
 423                return;
 424        }
 425
 426        fprintf(stderr, "fast-import: dumping crash report to %s\n", loc);
 427
 428        fprintf(rpt, "fast-import crash report:\n");
 429        fprintf(rpt, "    fast-import process: %"PRIuMAX"\n", (uintmax_t) getpid());
 430        fprintf(rpt, "    parent process     : %"PRIuMAX"\n", (uintmax_t) getppid());
 431        fprintf(rpt, "    at %s\n", show_date(time(NULL), 0, DATE_MODE(ISO8601)));
 432        fputc('\n', rpt);
 433
 434        fputs("fatal: ", rpt);
 435        fputs(err, rpt);
 436        fputc('\n', rpt);
 437
 438        fputc('\n', rpt);
 439        fputs("Most Recent Commands Before Crash\n", rpt);
 440        fputs("---------------------------------\n", rpt);
 441        for (rc = cmd_hist.next; rc != &cmd_hist; rc = rc->next) {
 442                if (rc->next == &cmd_hist)
 443                        fputs("* ", rpt);
 444                else
 445                        fputs("  ", rpt);
 446                fputs(rc->buf, rpt);
 447                fputc('\n', rpt);
 448        }
 449
 450        fputc('\n', rpt);
 451        fputs("Active Branch LRU\n", rpt);
 452        fputs("-----------------\n", rpt);
 453        fprintf(rpt, "    active_branches = %lu cur, %lu max\n",
 454                cur_active_branches,
 455                max_active_branches);
 456        fputc('\n', rpt);
 457        fputs("  pos  clock name\n", rpt);
 458        fputs("  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n", rpt);
 459        for (b = active_branches, lu = 0; b; b = b->active_next_branch)
 460                fprintf(rpt, "  %2lu) %6" PRIuMAX" %s\n",
 461                        ++lu, b->last_commit, b->name);
 462
 463        fputc('\n', rpt);
 464        fputs("Inactive Branches\n", rpt);
 465        fputs("-----------------\n", rpt);
 466        for (lu = 0; lu < branch_table_sz; lu++) {
 467                for (b = branch_table[lu]; b; b = b->table_next_branch)
 468                        write_branch_report(rpt, b);
 469        }
 470
 471        if (first_tag) {
 472                struct tag *tg;
 473                fputc('\n', rpt);
 474                fputs("Annotated Tags\n", rpt);
 475                fputs("--------------\n", rpt);
 476                for (tg = first_tag; tg; tg = tg->next_tag) {
 477                        fputs(oid_to_hex(&tg->oid), rpt);
 478                        fputc(' ', rpt);
 479                        fputs(tg->name, rpt);
 480                        fputc('\n', rpt);
 481                }
 482        }
 483
 484        fputc('\n', rpt);
 485        fputs("Marks\n", rpt);
 486        fputs("-----\n", rpt);
 487        if (export_marks_file)
 488                fprintf(rpt, "  exported to %s\n", export_marks_file);
 489        else
 490                dump_marks_helper(rpt, 0, marks);
 491
 492        fputc('\n', rpt);
 493        fputs("-------------------\n", rpt);
 494        fputs("END OF CRASH REPORT\n", rpt);
 495        fclose(rpt);
 496        free(loc);
 497}
 498
 499static void end_packfile(void);
 500static void unkeep_all_packs(void);
 501static void dump_marks(void);
 502
 503static NORETURN void die_nicely(const char *err, va_list params)
 504{
 505        static int zombie;
 506        char message[2 * PATH_MAX];
 507
 508        vsnprintf(message, sizeof(message), err, params);
 509        fputs("fatal: ", stderr);
 510        fputs(message, stderr);
 511        fputc('\n', stderr);
 512
 513        if (!zombie) {
 514                zombie = 1;
 515                write_crash_report(message);
 516                end_packfile();
 517                unkeep_all_packs();
 518                dump_marks();
 519        }
 520        exit(128);
 521}
 522
 523#ifndef SIGUSR1 /* Windows, for example */
 524
 525static void set_checkpoint_signal(void)
 526{
 527}
 528
 529#else
 530
 531static void checkpoint_signal(int signo)
 532{
 533        checkpoint_requested = 1;
 534}
 535
 536static void set_checkpoint_signal(void)
 537{
 538        struct sigaction sa;
 539
 540        memset(&sa, 0, sizeof(sa));
 541        sa.sa_handler = checkpoint_signal;
 542        sigemptyset(&sa.sa_mask);
 543        sa.sa_flags = SA_RESTART;
 544        sigaction(SIGUSR1, &sa, NULL);
 545}
 546
 547#endif
 548
 549static void alloc_objects(unsigned int cnt)
 550{
 551        struct object_entry_pool *b;
 552
 553        b = xmalloc(sizeof(struct object_entry_pool)
 554                + cnt * sizeof(struct object_entry));
 555        b->next_pool = blocks;
 556        b->next_free = b->entries;
 557        b->end = b->entries + cnt;
 558        blocks = b;
 559        alloc_count += cnt;
 560}
 561
 562static struct object_entry *new_object(struct object_id *oid)
 563{
 564        struct object_entry *e;
 565
 566        if (blocks->next_free == blocks->end)
 567                alloc_objects(object_entry_alloc);
 568
 569        e = blocks->next_free++;
 570        oidcpy(&e->idx.oid, oid);
 571        return e;
 572}
 573
 574static struct object_entry *find_object(struct object_id *oid)
 575{
 576        unsigned int h = oid->hash[0] << 8 | oid->hash[1];
 577        struct object_entry *e;
 578        for (e = object_table[h]; e; e = e->next)
 579                if (!oidcmp(oid, &e->idx.oid))
 580                        return e;
 581        return NULL;
 582}
 583
 584static struct object_entry *insert_object(struct object_id *oid)
 585{
 586        unsigned int h = oid->hash[0] << 8 | oid->hash[1];
 587        struct object_entry *e = object_table[h];
 588
 589        while (e) {
 590                if (!oidcmp(oid, &e->idx.oid))
 591                        return e;
 592                e = e->next;
 593        }
 594
 595        e = new_object(oid);
 596        e->next = object_table[h];
 597        e->idx.offset = 0;
 598        object_table[h] = e;
 599        return e;
 600}
 601
 602static void invalidate_pack_id(unsigned int id)
 603{
 604        unsigned int h;
 605        unsigned long lu;
 606        struct tag *t;
 607
 608        for (h = 0; h < ARRAY_SIZE(object_table); h++) {
 609                struct object_entry *e;
 610
 611                for (e = object_table[h]; e; e = e->next)
 612                        if (e->pack_id == id)
 613                                e->pack_id = MAX_PACK_ID;
 614        }
 615
 616        for (lu = 0; lu < branch_table_sz; lu++) {
 617                struct branch *b;
 618
 619                for (b = branch_table[lu]; b; b = b->table_next_branch)
 620                        if (b->pack_id == id)
 621                                b->pack_id = MAX_PACK_ID;
 622        }
 623
 624        for (t = first_tag; t; t = t->next_tag)
 625                if (t->pack_id == id)
 626                        t->pack_id = MAX_PACK_ID;
 627}
 628
 629static unsigned int hc_str(const char *s, size_t len)
 630{
 631        unsigned int r = 0;
 632        while (len-- > 0)
 633                r = r * 31 + *s++;
 634        return r;
 635}
 636
 637static void *pool_alloc(size_t len)
 638{
 639        struct mem_pool *p;
 640        void *r;
 641
 642        /* round up to a 'uintmax_t' alignment */
 643        if (len & (sizeof(uintmax_t) - 1))
 644                len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
 645
 646        for (p = mem_pool; p; p = p->next_pool)
 647                if ((p->end - p->next_free >= len))
 648                        break;
 649
 650        if (!p) {
 651                if (len >= (mem_pool_alloc/2)) {
 652                        total_allocd += len;
 653                        return xmalloc(len);
 654                }
 655                total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
 656                p = xmalloc(st_add(sizeof(struct mem_pool), mem_pool_alloc));
 657                p->next_pool = mem_pool;
 658                p->next_free = (char *) p->space;
 659                p->end = p->next_free + mem_pool_alloc;
 660                mem_pool = p;
 661        }
 662
 663        r = p->next_free;
 664        p->next_free += len;
 665        return r;
 666}
 667
 668static void *pool_calloc(size_t count, size_t size)
 669{
 670        size_t len = count * size;
 671        void *r = pool_alloc(len);
 672        memset(r, 0, len);
 673        return r;
 674}
 675
 676static char *pool_strdup(const char *s)
 677{
 678        size_t len = strlen(s) + 1;
 679        char *r = pool_alloc(len);
 680        memcpy(r, s, len);
 681        return r;
 682}
 683
 684static void insert_mark(uintmax_t idnum, struct object_entry *oe)
 685{
 686        struct mark_set *s = marks;
 687        while ((idnum >> s->shift) >= 1024) {
 688                s = pool_calloc(1, sizeof(struct mark_set));
 689                s->shift = marks->shift + 10;
 690                s->data.sets[0] = marks;
 691                marks = s;
 692        }
 693        while (s->shift) {
 694                uintmax_t i = idnum >> s->shift;
 695                idnum -= i << s->shift;
 696                if (!s->data.sets[i]) {
 697                        s->data.sets[i] = pool_calloc(1, sizeof(struct mark_set));
 698                        s->data.sets[i]->shift = s->shift - 10;
 699                }
 700                s = s->data.sets[i];
 701        }
 702        if (!s->data.marked[idnum])
 703                marks_set_count++;
 704        s->data.marked[idnum] = oe;
 705}
 706
 707static struct object_entry *find_mark(uintmax_t idnum)
 708{
 709        uintmax_t orig_idnum = idnum;
 710        struct mark_set *s = marks;
 711        struct object_entry *oe = NULL;
 712        if ((idnum >> s->shift) < 1024) {
 713                while (s && s->shift) {
 714                        uintmax_t i = idnum >> s->shift;
 715                        idnum -= i << s->shift;
 716                        s = s->data.sets[i];
 717                }
 718                if (s)
 719                        oe = s->data.marked[idnum];
 720        }
 721        if (!oe)
 722                die("mark :%" PRIuMAX " not declared", orig_idnum);
 723        return oe;
 724}
 725
 726static struct atom_str *to_atom(const char *s, unsigned short len)
 727{
 728        unsigned int hc = hc_str(s, len) % atom_table_sz;
 729        struct atom_str *c;
 730
 731        for (c = atom_table[hc]; c; c = c->next_atom)
 732                if (c->str_len == len && !strncmp(s, c->str_dat, len))
 733                        return c;
 734
 735        c = pool_alloc(sizeof(struct atom_str) + len + 1);
 736        c->str_len = len;
 737        memcpy(c->str_dat, s, len);
 738        c->str_dat[len] = 0;
 739        c->next_atom = atom_table[hc];
 740        atom_table[hc] = c;
 741        atom_cnt++;
 742        return c;
 743}
 744
 745static struct branch *lookup_branch(const char *name)
 746{
 747        unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
 748        struct branch *b;
 749
 750        for (b = branch_table[hc]; b; b = b->table_next_branch)
 751                if (!strcmp(name, b->name))
 752                        return b;
 753        return NULL;
 754}
 755
 756static struct branch *new_branch(const char *name)
 757{
 758        unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
 759        struct branch *b = lookup_branch(name);
 760
 761        if (b)
 762                die("Invalid attempt to create duplicate branch: %s", name);
 763        if (check_refname_format(name, REFNAME_ALLOW_ONELEVEL))
 764                die("Branch name doesn't conform to GIT standards: %s", name);
 765
 766        b = pool_calloc(1, sizeof(struct branch));
 767        b->name = pool_strdup(name);
 768        b->table_next_branch = branch_table[hc];
 769        b->branch_tree.versions[0].mode = S_IFDIR;
 770        b->branch_tree.versions[1].mode = S_IFDIR;
 771        b->num_notes = 0;
 772        b->active = 0;
 773        b->pack_id = MAX_PACK_ID;
 774        branch_table[hc] = b;
 775        branch_count++;
 776        return b;
 777}
 778
 779static unsigned int hc_entries(unsigned int cnt)
 780{
 781        cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
 782        return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
 783}
 784
 785static struct tree_content *new_tree_content(unsigned int cnt)
 786{
 787        struct avail_tree_content *f, *l = NULL;
 788        struct tree_content *t;
 789        unsigned int hc = hc_entries(cnt);
 790
 791        for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
 792                if (f->entry_capacity >= cnt)
 793                        break;
 794
 795        if (f) {
 796                if (l)
 797                        l->next_avail = f->next_avail;
 798                else
 799                        avail_tree_table[hc] = f->next_avail;
 800        } else {
 801                cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
 802                f = pool_alloc(sizeof(*t) + sizeof(t->entries[0]) * cnt);
 803                f->entry_capacity = cnt;
 804        }
 805
 806        t = (struct tree_content*)f;
 807        t->entry_count = 0;
 808        t->delta_depth = 0;
 809        return t;
 810}
 811
 812static void release_tree_entry(struct tree_entry *e);
 813static void release_tree_content(struct tree_content *t)
 814{
 815        struct avail_tree_content *f = (struct avail_tree_content*)t;
 816        unsigned int hc = hc_entries(f->entry_capacity);
 817        f->next_avail = avail_tree_table[hc];
 818        avail_tree_table[hc] = f;
 819}
 820
 821static void release_tree_content_recursive(struct tree_content *t)
 822{
 823        unsigned int i;
 824        for (i = 0; i < t->entry_count; i++)
 825                release_tree_entry(t->entries[i]);
 826        release_tree_content(t);
 827}
 828
 829static struct tree_content *grow_tree_content(
 830        struct tree_content *t,
 831        int amt)
 832{
 833        struct tree_content *r = new_tree_content(t->entry_count + amt);
 834        r->entry_count = t->entry_count;
 835        r->delta_depth = t->delta_depth;
 836        memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
 837        release_tree_content(t);
 838        return r;
 839}
 840
 841static struct tree_entry *new_tree_entry(void)
 842{
 843        struct tree_entry *e;
 844
 845        if (!avail_tree_entry) {
 846                unsigned int n = tree_entry_alloc;
 847                total_allocd += n * sizeof(struct tree_entry);
 848                ALLOC_ARRAY(e, n);
 849                avail_tree_entry = e;
 850                while (n-- > 1) {
 851                        *((void**)e) = e + 1;
 852                        e++;
 853                }
 854                *((void**)e) = NULL;
 855        }
 856
 857        e = avail_tree_entry;
 858        avail_tree_entry = *((void**)e);
 859        return e;
 860}
 861
 862static void release_tree_entry(struct tree_entry *e)
 863{
 864        if (e->tree)
 865                release_tree_content_recursive(e->tree);
 866        *((void**)e) = avail_tree_entry;
 867        avail_tree_entry = e;
 868}
 869
 870static struct tree_content *dup_tree_content(struct tree_content *s)
 871{
 872        struct tree_content *d;
 873        struct tree_entry *a, *b;
 874        unsigned int i;
 875
 876        if (!s)
 877                return NULL;
 878        d = new_tree_content(s->entry_count);
 879        for (i = 0; i < s->entry_count; i++) {
 880                a = s->entries[i];
 881                b = new_tree_entry();
 882                memcpy(b, a, sizeof(*a));
 883                if (a->tree && is_null_oid(&b->versions[1].oid))
 884                        b->tree = dup_tree_content(a->tree);
 885                else
 886                        b->tree = NULL;
 887                d->entries[i] = b;
 888        }
 889        d->entry_count = s->entry_count;
 890        d->delta_depth = s->delta_depth;
 891
 892        return d;
 893}
 894
 895static void start_packfile(void)
 896{
 897        struct strbuf tmp_file = STRBUF_INIT;
 898        struct packed_git *p;
 899        struct pack_header hdr;
 900        int pack_fd;
 901
 902        pack_fd = odb_mkstemp(&tmp_file, "pack/tmp_pack_XXXXXX");
 903        FLEX_ALLOC_STR(p, pack_name, tmp_file.buf);
 904        strbuf_release(&tmp_file);
 905
 906        p->pack_fd = pack_fd;
 907        p->do_not_close = 1;
 908        pack_file = sha1fd(pack_fd, p->pack_name);
 909
 910        hdr.hdr_signature = htonl(PACK_SIGNATURE);
 911        hdr.hdr_version = htonl(2);
 912        hdr.hdr_entries = 0;
 913        sha1write(pack_file, &hdr, sizeof(hdr));
 914
 915        pack_data = p;
 916        pack_size = sizeof(hdr);
 917        object_count = 0;
 918
 919        REALLOC_ARRAY(all_packs, pack_id + 1);
 920        all_packs[pack_id] = p;
 921}
 922
 923static const char *create_index(void)
 924{
 925        const char *tmpfile;
 926        struct pack_idx_entry **idx, **c, **last;
 927        struct object_entry *e;
 928        struct object_entry_pool *o;
 929
 930        /* Build the table of object IDs. */
 931        ALLOC_ARRAY(idx, object_count);
 932        c = idx;
 933        for (o = blocks; o; o = o->next_pool)
 934                for (e = o->next_free; e-- != o->entries;)
 935                        if (pack_id == e->pack_id)
 936                                *c++ = &e->idx;
 937        last = idx + object_count;
 938        if (c != last)
 939                die("internal consistency error creating the index");
 940
 941        tmpfile = write_idx_file(NULL, idx, object_count, &pack_idx_opts, pack_data->sha1);
 942        free(idx);
 943        return tmpfile;
 944}
 945
 946static char *keep_pack(const char *curr_index_name)
 947{
 948        static const char *keep_msg = "fast-import";
 949        struct strbuf name = STRBUF_INIT;
 950        int keep_fd;
 951
 952        odb_pack_name(&name, pack_data->sha1, "keep");
 953        keep_fd = odb_pack_keep(name.buf);
 954        if (keep_fd < 0)
 955                die_errno("cannot create keep file");
 956        write_or_die(keep_fd, keep_msg, strlen(keep_msg));
 957        if (close(keep_fd))
 958                die_errno("failed to write keep file");
 959
 960        odb_pack_name(&name, pack_data->sha1, "pack");
 961        if (finalize_object_file(pack_data->pack_name, name.buf))
 962                die("cannot store pack file");
 963
 964        odb_pack_name(&name, pack_data->sha1, "idx");
 965        if (finalize_object_file(curr_index_name, name.buf))
 966                die("cannot store index file");
 967        free((void *)curr_index_name);
 968        return strbuf_detach(&name, NULL);
 969}
 970
 971static void unkeep_all_packs(void)
 972{
 973        struct strbuf name = STRBUF_INIT;
 974        int k;
 975
 976        for (k = 0; k < pack_id; k++) {
 977                struct packed_git *p = all_packs[k];
 978                odb_pack_name(&name, p->sha1, "keep");
 979                unlink_or_warn(name.buf);
 980        }
 981        strbuf_release(&name);
 982}
 983
 984static int loosen_small_pack(const struct packed_git *p)
 985{
 986        struct child_process unpack = CHILD_PROCESS_INIT;
 987
 988        if (lseek(p->pack_fd, 0, SEEK_SET) < 0)
 989                die_errno("Failed seeking to start of '%s'", p->pack_name);
 990
 991        unpack.in = p->pack_fd;
 992        unpack.git_cmd = 1;
 993        unpack.stdout_to_stderr = 1;
 994        argv_array_push(&unpack.args, "unpack-objects");
 995        if (!show_stats)
 996                argv_array_push(&unpack.args, "-q");
 997
 998        return run_command(&unpack);
 999}
1000
1001static void end_packfile(void)
1002{
1003        static int running;
1004
1005        if (running || !pack_data)
1006                return;
1007
1008        running = 1;
1009        clear_delta_base_cache();
1010        if (object_count) {
1011                struct packed_git *new_p;
1012                struct object_id cur_pack_oid;
1013                char *idx_name;
1014                int i;
1015                struct branch *b;
1016                struct tag *t;
1017
1018                close_pack_windows(pack_data);
1019                sha1close(pack_file, cur_pack_oid.hash, 0);
1020                fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
1021                                    pack_data->pack_name, object_count,
1022                                    cur_pack_oid.hash, pack_size);
1023
1024                if (object_count <= unpack_limit) {
1025                        if (!loosen_small_pack(pack_data)) {
1026                                invalidate_pack_id(pack_id);
1027                                goto discard_pack;
1028                        }
1029                }
1030
1031                close(pack_data->pack_fd);
1032                idx_name = keep_pack(create_index());
1033
1034                /* Register the packfile with core git's machinery. */
1035                new_p = add_packed_git(idx_name, strlen(idx_name), 1);
1036                if (!new_p)
1037                        die("core git rejected index %s", idx_name);
1038                all_packs[pack_id] = new_p;
1039                install_packed_git(new_p);
1040                free(idx_name);
1041
1042                /* Print the boundary */
1043                if (pack_edges) {
1044                        fprintf(pack_edges, "%s:", new_p->pack_name);
1045                        for (i = 0; i < branch_table_sz; i++) {
1046                                for (b = branch_table[i]; b; b = b->table_next_branch) {
1047                                        if (b->pack_id == pack_id)
1048                                                fprintf(pack_edges, " %s",
1049                                                        oid_to_hex(&b->oid));
1050                                }
1051                        }
1052                        for (t = first_tag; t; t = t->next_tag) {
1053                                if (t->pack_id == pack_id)
1054                                        fprintf(pack_edges, " %s",
1055                                                oid_to_hex(&t->oid));
1056                        }
1057                        fputc('\n', pack_edges);
1058                        fflush(pack_edges);
1059                }
1060
1061                pack_id++;
1062        }
1063        else {
1064discard_pack:
1065                close(pack_data->pack_fd);
1066                unlink_or_warn(pack_data->pack_name);
1067        }
1068        FREE_AND_NULL(pack_data);
1069        running = 0;
1070
1071        /* We can't carry a delta across packfiles. */
1072        strbuf_release(&last_blob.data);
1073        last_blob.offset = 0;
1074        last_blob.depth = 0;
1075}
1076
1077static void cycle_packfile(void)
1078{
1079        end_packfile();
1080        start_packfile();
1081}
1082
1083static int store_object(
1084        enum object_type type,
1085        struct strbuf *dat,
1086        struct last_object *last,
1087        struct object_id *oidout,
1088        uintmax_t mark)
1089{
1090        void *out, *delta;
1091        struct object_entry *e;
1092        unsigned char hdr[96];
1093        struct object_id oid;
1094        unsigned long hdrlen, deltalen;
1095        git_SHA_CTX c;
1096        git_zstream s;
1097
1098        hdrlen = xsnprintf((char *)hdr, sizeof(hdr), "%s %lu",
1099                           typename(type), (unsigned long)dat->len) + 1;
1100        git_SHA1_Init(&c);
1101        git_SHA1_Update(&c, hdr, hdrlen);
1102        git_SHA1_Update(&c, dat->buf, dat->len);
1103        git_SHA1_Final(oid.hash, &c);
1104        if (oidout)
1105                oidcpy(oidout, &oid);
1106
1107        e = insert_object(&oid);
1108        if (mark)
1109                insert_mark(mark, e);
1110        if (e->idx.offset) {
1111                duplicate_count_by_type[type]++;
1112                return 1;
1113        } else if (find_sha1_pack(oid.hash, packed_git)) {
1114                e->type = type;
1115                e->pack_id = MAX_PACK_ID;
1116                e->idx.offset = 1; /* just not zero! */
1117                duplicate_count_by_type[type]++;
1118                return 1;
1119        }
1120
1121        if (last && last->data.buf && last->depth < max_depth && dat->len > 20) {
1122                delta_count_attempts_by_type[type]++;
1123                delta = diff_delta(last->data.buf, last->data.len,
1124                        dat->buf, dat->len,
1125                        &deltalen, dat->len - 20);
1126        } else
1127                delta = NULL;
1128
1129        git_deflate_init(&s, pack_compression_level);
1130        if (delta) {
1131                s.next_in = delta;
1132                s.avail_in = deltalen;
1133        } else {
1134                s.next_in = (void *)dat->buf;
1135                s.avail_in = dat->len;
1136        }
1137        s.avail_out = git_deflate_bound(&s, s.avail_in);
1138        s.next_out = out = xmalloc(s.avail_out);
1139        while (git_deflate(&s, Z_FINISH) == Z_OK)
1140                ; /* nothing */
1141        git_deflate_end(&s);
1142
1143        /* Determine if we should auto-checkpoint. */
1144        if ((max_packsize && (pack_size + 60 + s.total_out) > max_packsize)
1145                || (pack_size + 60 + s.total_out) < pack_size) {
1146
1147                /* This new object needs to *not* have the current pack_id. */
1148                e->pack_id = pack_id + 1;
1149                cycle_packfile();
1150
1151                /* We cannot carry a delta into the new pack. */
1152                if (delta) {
1153                        FREE_AND_NULL(delta);
1154
1155                        git_deflate_init(&s, pack_compression_level);
1156                        s.next_in = (void *)dat->buf;
1157                        s.avail_in = dat->len;
1158                        s.avail_out = git_deflate_bound(&s, s.avail_in);
1159                        s.next_out = out = xrealloc(out, s.avail_out);
1160                        while (git_deflate(&s, Z_FINISH) == Z_OK)
1161                                ; /* nothing */
1162                        git_deflate_end(&s);
1163                }
1164        }
1165
1166        e->type = type;
1167        e->pack_id = pack_id;
1168        e->idx.offset = pack_size;
1169        object_count++;
1170        object_count_by_type[type]++;
1171
1172        crc32_begin(pack_file);
1173
1174        if (delta) {
1175                off_t ofs = e->idx.offset - last->offset;
1176                unsigned pos = sizeof(hdr) - 1;
1177
1178                delta_count_by_type[type]++;
1179                e->depth = last->depth + 1;
1180
1181                hdrlen = encode_in_pack_object_header(hdr, sizeof(hdr),
1182                                                      OBJ_OFS_DELTA, deltalen);
1183                sha1write(pack_file, hdr, hdrlen);
1184                pack_size += hdrlen;
1185
1186                hdr[pos] = ofs & 127;
1187                while (ofs >>= 7)
1188                        hdr[--pos] = 128 | (--ofs & 127);
1189                sha1write(pack_file, hdr + pos, sizeof(hdr) - pos);
1190                pack_size += sizeof(hdr) - pos;
1191        } else {
1192                e->depth = 0;
1193                hdrlen = encode_in_pack_object_header(hdr, sizeof(hdr),
1194                                                      type, dat->len);
1195                sha1write(pack_file, hdr, hdrlen);
1196                pack_size += hdrlen;
1197        }
1198
1199        sha1write(pack_file, out, s.total_out);
1200        pack_size += s.total_out;
1201
1202        e->idx.crc32 = crc32_end(pack_file);
1203
1204        free(out);
1205        free(delta);
1206        if (last) {
1207                if (last->no_swap) {
1208                        last->data = *dat;
1209                } else {
1210                        strbuf_swap(&last->data, dat);
1211                }
1212                last->offset = e->idx.offset;
1213                last->depth = e->depth;
1214        }
1215        return 0;
1216}
1217
1218static void truncate_pack(struct sha1file_checkpoint *checkpoint)
1219{
1220        if (sha1file_truncate(pack_file, checkpoint))
1221                die_errno("cannot truncate pack to skip duplicate");
1222        pack_size = checkpoint->offset;
1223}
1224
1225static void stream_blob(uintmax_t len, struct object_id *oidout, uintmax_t mark)
1226{
1227        size_t in_sz = 64 * 1024, out_sz = 64 * 1024;
1228        unsigned char *in_buf = xmalloc(in_sz);
1229        unsigned char *out_buf = xmalloc(out_sz);
1230        struct object_entry *e;
1231        struct object_id oid;
1232        unsigned long hdrlen;
1233        off_t offset;
1234        git_SHA_CTX c;
1235        git_zstream s;
1236        struct sha1file_checkpoint checkpoint;
1237        int status = Z_OK;
1238
1239        /* Determine if we should auto-checkpoint. */
1240        if ((max_packsize && (pack_size + 60 + len) > max_packsize)
1241                || (pack_size + 60 + len) < pack_size)
1242                cycle_packfile();
1243
1244        sha1file_checkpoint(pack_file, &checkpoint);
1245        offset = checkpoint.offset;
1246
1247        hdrlen = xsnprintf((char *)out_buf, out_sz, "blob %" PRIuMAX, len) + 1;
1248
1249        git_SHA1_Init(&c);
1250        git_SHA1_Update(&c, out_buf, hdrlen);
1251
1252        crc32_begin(pack_file);
1253
1254        git_deflate_init(&s, pack_compression_level);
1255
1256        hdrlen = encode_in_pack_object_header(out_buf, out_sz, OBJ_BLOB, len);
1257
1258        s.next_out = out_buf + hdrlen;
1259        s.avail_out = out_sz - hdrlen;
1260
1261        while (status != Z_STREAM_END) {
1262                if (0 < len && !s.avail_in) {
1263                        size_t cnt = in_sz < len ? in_sz : (size_t)len;
1264                        size_t n = fread(in_buf, 1, cnt, stdin);
1265                        if (!n && feof(stdin))
1266                                die("EOF in data (%" PRIuMAX " bytes remaining)", len);
1267
1268                        git_SHA1_Update(&c, in_buf, n);
1269                        s.next_in = in_buf;
1270                        s.avail_in = n;
1271                        len -= n;
1272                }
1273
1274                status = git_deflate(&s, len ? 0 : Z_FINISH);
1275
1276                if (!s.avail_out || status == Z_STREAM_END) {
1277                        size_t n = s.next_out - out_buf;
1278                        sha1write(pack_file, out_buf, n);
1279                        pack_size += n;
1280                        s.next_out = out_buf;
1281                        s.avail_out = out_sz;
1282                }
1283
1284                switch (status) {
1285                case Z_OK:
1286                case Z_BUF_ERROR:
1287                case Z_STREAM_END:
1288                        continue;
1289                default:
1290                        die("unexpected deflate failure: %d", status);
1291                }
1292        }
1293        git_deflate_end(&s);
1294        git_SHA1_Final(oid.hash, &c);
1295
1296        if (oidout)
1297                oidcpy(oidout, &oid);
1298
1299        e = insert_object(&oid);
1300
1301        if (mark)
1302                insert_mark(mark, e);
1303
1304        if (e->idx.offset) {
1305                duplicate_count_by_type[OBJ_BLOB]++;
1306                truncate_pack(&checkpoint);
1307
1308        } else if (find_sha1_pack(oid.hash, packed_git)) {
1309                e->type = OBJ_BLOB;
1310                e->pack_id = MAX_PACK_ID;
1311                e->idx.offset = 1; /* just not zero! */
1312                duplicate_count_by_type[OBJ_BLOB]++;
1313                truncate_pack(&checkpoint);
1314
1315        } else {
1316                e->depth = 0;
1317                e->type = OBJ_BLOB;
1318                e->pack_id = pack_id;
1319                e->idx.offset = offset;
1320                e->idx.crc32 = crc32_end(pack_file);
1321                object_count++;
1322                object_count_by_type[OBJ_BLOB]++;
1323        }
1324
1325        free(in_buf);
1326        free(out_buf);
1327}
1328
1329/* All calls must be guarded by find_object() or find_mark() to
1330 * ensure the 'struct object_entry' passed was written by this
1331 * process instance.  We unpack the entry by the offset, avoiding
1332 * the need for the corresponding .idx file.  This unpacking rule
1333 * works because we only use OBJ_REF_DELTA within the packfiles
1334 * created by fast-import.
1335 *
1336 * oe must not be NULL.  Such an oe usually comes from giving
1337 * an unknown SHA-1 to find_object() or an undefined mark to
1338 * find_mark().  Callers must test for this condition and use
1339 * the standard read_sha1_file() when it happens.
1340 *
1341 * oe->pack_id must not be MAX_PACK_ID.  Such an oe is usually from
1342 * find_mark(), where the mark was reloaded from an existing marks
1343 * file and is referencing an object that this fast-import process
1344 * instance did not write out to a packfile.  Callers must test for
1345 * this condition and use read_sha1_file() instead.
1346 */
1347static void *gfi_unpack_entry(
1348        struct object_entry *oe,
1349        unsigned long *sizep)
1350{
1351        enum object_type type;
1352        struct packed_git *p = all_packs[oe->pack_id];
1353        if (p == pack_data && p->pack_size < (pack_size + 20)) {
1354                /* The object is stored in the packfile we are writing to
1355                 * and we have modified it since the last time we scanned
1356                 * back to read a previously written object.  If an old
1357                 * window covered [p->pack_size, p->pack_size + 20) its
1358                 * data is stale and is not valid.  Closing all windows
1359                 * and updating the packfile length ensures we can read
1360                 * the newly written data.
1361                 */
1362                close_pack_windows(p);
1363                sha1flush(pack_file);
1364
1365                /* We have to offer 20 bytes additional on the end of
1366                 * the packfile as the core unpacker code assumes the
1367                 * footer is present at the file end and must promise
1368                 * at least 20 bytes within any window it maps.  But
1369                 * we don't actually create the footer here.
1370                 */
1371                p->pack_size = pack_size + 20;
1372        }
1373        return unpack_entry(p, oe->idx.offset, &type, sizep);
1374}
1375
1376static const char *get_mode(const char *str, uint16_t *modep)
1377{
1378        unsigned char c;
1379        uint16_t mode = 0;
1380
1381        while ((c = *str++) != ' ') {
1382                if (c < '0' || c > '7')
1383                        return NULL;
1384                mode = (mode << 3) + (c - '0');
1385        }
1386        *modep = mode;
1387        return str;
1388}
1389
1390static void load_tree(struct tree_entry *root)
1391{
1392        struct object_id *oid = &root->versions[1].oid;
1393        struct object_entry *myoe;
1394        struct tree_content *t;
1395        unsigned long size;
1396        char *buf;
1397        const char *c;
1398
1399        root->tree = t = new_tree_content(8);
1400        if (is_null_oid(oid))
1401                return;
1402
1403        myoe = find_object(oid);
1404        if (myoe && myoe->pack_id != MAX_PACK_ID) {
1405                if (myoe->type != OBJ_TREE)
1406                        die("Not a tree: %s", oid_to_hex(oid));
1407                t->delta_depth = myoe->depth;
1408                buf = gfi_unpack_entry(myoe, &size);
1409                if (!buf)
1410                        die("Can't load tree %s", oid_to_hex(oid));
1411        } else {
1412                enum object_type type;
1413                buf = read_sha1_file(oid->hash, &type, &size);
1414                if (!buf || type != OBJ_TREE)
1415                        die("Can't load tree %s", oid_to_hex(oid));
1416        }
1417
1418        c = buf;
1419        while (c != (buf + size)) {
1420                struct tree_entry *e = new_tree_entry();
1421
1422                if (t->entry_count == t->entry_capacity)
1423                        root->tree = t = grow_tree_content(t, t->entry_count);
1424                t->entries[t->entry_count++] = e;
1425
1426                e->tree = NULL;
1427                c = get_mode(c, &e->versions[1].mode);
1428                if (!c)
1429                        die("Corrupt mode in %s", oid_to_hex(oid));
1430                e->versions[0].mode = e->versions[1].mode;
1431                e->name = to_atom(c, strlen(c));
1432                c += e->name->str_len + 1;
1433                hashcpy(e->versions[0].oid.hash, (unsigned char *)c);
1434                hashcpy(e->versions[1].oid.hash, (unsigned char *)c);
1435                c += GIT_SHA1_RAWSZ;
1436        }
1437        free(buf);
1438}
1439
1440static int tecmp0 (const void *_a, const void *_b)
1441{
1442        struct tree_entry *a = *((struct tree_entry**)_a);
1443        struct tree_entry *b = *((struct tree_entry**)_b);
1444        return base_name_compare(
1445                a->name->str_dat, a->name->str_len, a->versions[0].mode,
1446                b->name->str_dat, b->name->str_len, b->versions[0].mode);
1447}
1448
1449static int tecmp1 (const void *_a, const void *_b)
1450{
1451        struct tree_entry *a = *((struct tree_entry**)_a);
1452        struct tree_entry *b = *((struct tree_entry**)_b);
1453        return base_name_compare(
1454                a->name->str_dat, a->name->str_len, a->versions[1].mode,
1455                b->name->str_dat, b->name->str_len, b->versions[1].mode);
1456}
1457
1458static void mktree(struct tree_content *t, int v, struct strbuf *b)
1459{
1460        size_t maxlen = 0;
1461        unsigned int i;
1462
1463        if (!v)
1464                QSORT(t->entries, t->entry_count, tecmp0);
1465        else
1466                QSORT(t->entries, t->entry_count, tecmp1);
1467
1468        for (i = 0; i < t->entry_count; i++) {
1469                if (t->entries[i]->versions[v].mode)
1470                        maxlen += t->entries[i]->name->str_len + 34;
1471        }
1472
1473        strbuf_reset(b);
1474        strbuf_grow(b, maxlen);
1475        for (i = 0; i < t->entry_count; i++) {
1476                struct tree_entry *e = t->entries[i];
1477                if (!e->versions[v].mode)
1478                        continue;
1479                strbuf_addf(b, "%o %s%c",
1480                        (unsigned int)(e->versions[v].mode & ~NO_DELTA),
1481                        e->name->str_dat, '\0');
1482                strbuf_add(b, e->versions[v].oid.hash, GIT_SHA1_RAWSZ);
1483        }
1484}
1485
1486static void store_tree(struct tree_entry *root)
1487{
1488        struct tree_content *t;
1489        unsigned int i, j, del;
1490        struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 };
1491        struct object_entry *le = NULL;
1492
1493        if (!is_null_oid(&root->versions[1].oid))
1494                return;
1495
1496        if (!root->tree)
1497                load_tree(root);
1498        t = root->tree;
1499
1500        for (i = 0; i < t->entry_count; i++) {
1501                if (t->entries[i]->tree)
1502                        store_tree(t->entries[i]);
1503        }
1504
1505        if (!(root->versions[0].mode & NO_DELTA))
1506                le = find_object(&root->versions[0].oid);
1507        if (S_ISDIR(root->versions[0].mode) && le && le->pack_id == pack_id) {
1508                mktree(t, 0, &old_tree);
1509                lo.data = old_tree;
1510                lo.offset = le->idx.offset;
1511                lo.depth = t->delta_depth;
1512        }
1513
1514        mktree(t, 1, &new_tree);
1515        store_object(OBJ_TREE, &new_tree, &lo, &root->versions[1].oid, 0);
1516
1517        t->delta_depth = lo.depth;
1518        for (i = 0, j = 0, del = 0; i < t->entry_count; i++) {
1519                struct tree_entry *e = t->entries[i];
1520                if (e->versions[1].mode) {
1521                        e->versions[0].mode = e->versions[1].mode;
1522                        oidcpy(&e->versions[0].oid, &e->versions[1].oid);
1523                        t->entries[j++] = e;
1524                } else {
1525                        release_tree_entry(e);
1526                        del++;
1527                }
1528        }
1529        t->entry_count -= del;
1530}
1531
1532static void tree_content_replace(
1533        struct tree_entry *root,
1534        const struct object_id *oid,
1535        const uint16_t mode,
1536        struct tree_content *newtree)
1537{
1538        if (!S_ISDIR(mode))
1539                die("Root cannot be a non-directory");
1540        oidclr(&root->versions[0].oid);
1541        oidcpy(&root->versions[1].oid, oid);
1542        if (root->tree)
1543                release_tree_content_recursive(root->tree);
1544        root->tree = newtree;
1545}
1546
1547static int tree_content_set(
1548        struct tree_entry *root,
1549        const char *p,
1550        const struct object_id *oid,
1551        const uint16_t mode,
1552        struct tree_content *subtree)
1553{
1554        struct tree_content *t;
1555        const char *slash1;
1556        unsigned int i, n;
1557        struct tree_entry *e;
1558
1559        slash1 = strchrnul(p, '/');
1560        n = slash1 - p;
1561        if (!n)
1562                die("Empty path component found in input");
1563        if (!*slash1 && !S_ISDIR(mode) && subtree)
1564                die("Non-directories cannot have subtrees");
1565
1566        if (!root->tree)
1567                load_tree(root);
1568        t = root->tree;
1569        for (i = 0; i < t->entry_count; i++) {
1570                e = t->entries[i];
1571                if (e->name->str_len == n && !fspathncmp(p, e->name->str_dat, n)) {
1572                        if (!*slash1) {
1573                                if (!S_ISDIR(mode)
1574                                                && e->versions[1].mode == mode
1575                                                && !oidcmp(&e->versions[1].oid, oid))
1576                                        return 0;
1577                                e->versions[1].mode = mode;
1578                                oidcpy(&e->versions[1].oid, oid);
1579                                if (e->tree)
1580                                        release_tree_content_recursive(e->tree);
1581                                e->tree = subtree;
1582
1583                                /*
1584                                 * We need to leave e->versions[0].sha1 alone
1585                                 * to avoid modifying the preimage tree used
1586                                 * when writing out the parent directory.
1587                                 * But after replacing the subdir with a
1588                                 * completely different one, it's not a good
1589                                 * delta base any more, and besides, we've
1590                                 * thrown away the tree entries needed to
1591                                 * make a delta against it.
1592                                 *
1593                                 * So let's just explicitly disable deltas
1594                                 * for the subtree.
1595                                 */
1596                                if (S_ISDIR(e->versions[0].mode))
1597                                        e->versions[0].mode |= NO_DELTA;
1598
1599                                oidclr(&root->versions[1].oid);
1600                                return 1;
1601                        }
1602                        if (!S_ISDIR(e->versions[1].mode)) {
1603                                e->tree = new_tree_content(8);
1604                                e->versions[1].mode = S_IFDIR;
1605                        }
1606                        if (!e->tree)
1607                                load_tree(e);
1608                        if (tree_content_set(e, slash1 + 1, oid, mode, subtree)) {
1609                                oidclr(&root->versions[1].oid);
1610                                return 1;
1611                        }
1612                        return 0;
1613                }
1614        }
1615
1616        if (t->entry_count == t->entry_capacity)
1617                root->tree = t = grow_tree_content(t, t->entry_count);
1618        e = new_tree_entry();
1619        e->name = to_atom(p, n);
1620        e->versions[0].mode = 0;
1621        oidclr(&e->versions[0].oid);
1622        t->entries[t->entry_count++] = e;
1623        if (*slash1) {
1624                e->tree = new_tree_content(8);
1625                e->versions[1].mode = S_IFDIR;
1626                tree_content_set(e, slash1 + 1, oid, mode, subtree);
1627        } else {
1628                e->tree = subtree;
1629                e->versions[1].mode = mode;
1630                oidcpy(&e->versions[1].oid, oid);
1631        }
1632        oidclr(&root->versions[1].oid);
1633        return 1;
1634}
1635
1636static int tree_content_remove(
1637        struct tree_entry *root,
1638        const char *p,
1639        struct tree_entry *backup_leaf,
1640        int allow_root)
1641{
1642        struct tree_content *t;
1643        const char *slash1;
1644        unsigned int i, n;
1645        struct tree_entry *e;
1646
1647        slash1 = strchrnul(p, '/');
1648        n = slash1 - p;
1649
1650        if (!root->tree)
1651                load_tree(root);
1652
1653        if (!*p && allow_root) {
1654                e = root;
1655                goto del_entry;
1656        }
1657
1658        t = root->tree;
1659        for (i = 0; i < t->entry_count; i++) {
1660                e = t->entries[i];
1661                if (e->name->str_len == n && !fspathncmp(p, e->name->str_dat, n)) {
1662                        if (*slash1 && !S_ISDIR(e->versions[1].mode))
1663                                /*
1664                                 * If p names a file in some subdirectory, and a
1665                                 * file or symlink matching the name of the
1666                                 * parent directory of p exists, then p cannot
1667                                 * exist and need not be deleted.
1668                                 */
1669                                return 1;
1670                        if (!*slash1 || !S_ISDIR(e->versions[1].mode))
1671                                goto del_entry;
1672                        if (!e->tree)
1673                                load_tree(e);
1674                        if (tree_content_remove(e, slash1 + 1, backup_leaf, 0)) {
1675                                for (n = 0; n < e->tree->entry_count; n++) {
1676                                        if (e->tree->entries[n]->versions[1].mode) {
1677                                                oidclr(&root->versions[1].oid);
1678                                                return 1;
1679                                        }
1680                                }
1681                                backup_leaf = NULL;
1682                                goto del_entry;
1683                        }
1684                        return 0;
1685                }
1686        }
1687        return 0;
1688
1689del_entry:
1690        if (backup_leaf)
1691                memcpy(backup_leaf, e, sizeof(*backup_leaf));
1692        else if (e->tree)
1693                release_tree_content_recursive(e->tree);
1694        e->tree = NULL;
1695        e->versions[1].mode = 0;
1696        oidclr(&e->versions[1].oid);
1697        oidclr(&root->versions[1].oid);
1698        return 1;
1699}
1700
1701static int tree_content_get(
1702        struct tree_entry *root,
1703        const char *p,
1704        struct tree_entry *leaf,
1705        int allow_root)
1706{
1707        struct tree_content *t;
1708        const char *slash1;
1709        unsigned int i, n;
1710        struct tree_entry *e;
1711
1712        slash1 = strchrnul(p, '/');
1713        n = slash1 - p;
1714        if (!n && !allow_root)
1715                die("Empty path component found in input");
1716
1717        if (!root->tree)
1718                load_tree(root);
1719
1720        if (!n) {
1721                e = root;
1722                goto found_entry;
1723        }
1724
1725        t = root->tree;
1726        for (i = 0; i < t->entry_count; i++) {
1727                e = t->entries[i];
1728                if (e->name->str_len == n && !fspathncmp(p, e->name->str_dat, n)) {
1729                        if (!*slash1)
1730                                goto found_entry;
1731                        if (!S_ISDIR(e->versions[1].mode))
1732                                return 0;
1733                        if (!e->tree)
1734                                load_tree(e);
1735                        return tree_content_get(e, slash1 + 1, leaf, 0);
1736                }
1737        }
1738        return 0;
1739
1740found_entry:
1741        memcpy(leaf, e, sizeof(*leaf));
1742        if (e->tree && is_null_oid(&e->versions[1].oid))
1743                leaf->tree = dup_tree_content(e->tree);
1744        else
1745                leaf->tree = NULL;
1746        return 1;
1747}
1748
1749static int update_branch(struct branch *b)
1750{
1751        static const char *msg = "fast-import";
1752        struct ref_transaction *transaction;
1753        struct object_id old_oid;
1754        struct strbuf err = STRBUF_INIT;
1755
1756        if (is_null_oid(&b->oid)) {
1757                if (b->delete)
1758                        delete_ref(NULL, b->name, NULL, 0);
1759                return 0;
1760        }
1761        if (read_ref(b->name, &old_oid))
1762                oidclr(&old_oid);
1763        if (!force_update && !is_null_oid(&old_oid)) {
1764                struct commit *old_cmit, *new_cmit;
1765
1766                old_cmit = lookup_commit_reference_gently(&old_oid, 0);
1767                new_cmit = lookup_commit_reference_gently(&b->oid, 0);
1768                if (!old_cmit || !new_cmit)
1769                        return error("Branch %s is missing commits.", b->name);
1770
1771                if (!in_merge_bases(old_cmit, new_cmit)) {
1772                        warning("Not updating %s"
1773                                " (new tip %s does not contain %s)",
1774                                b->name, oid_to_hex(&b->oid),
1775                                oid_to_hex(&old_oid));
1776                        return -1;
1777                }
1778        }
1779        transaction = ref_transaction_begin(&err);
1780        if (!transaction ||
1781            ref_transaction_update(transaction, b->name, &b->oid, &old_oid,
1782                                   0, msg, &err) ||
1783            ref_transaction_commit(transaction, &err)) {
1784                ref_transaction_free(transaction);
1785                error("%s", err.buf);
1786                strbuf_release(&err);
1787                return -1;
1788        }
1789        ref_transaction_free(transaction);
1790        strbuf_release(&err);
1791        return 0;
1792}
1793
1794static void dump_branches(void)
1795{
1796        unsigned int i;
1797        struct branch *b;
1798
1799        for (i = 0; i < branch_table_sz; i++) {
1800                for (b = branch_table[i]; b; b = b->table_next_branch)
1801                        failure |= update_branch(b);
1802        }
1803}
1804
1805static void dump_tags(void)
1806{
1807        static const char *msg = "fast-import";
1808        struct tag *t;
1809        struct strbuf ref_name = STRBUF_INIT;
1810        struct strbuf err = STRBUF_INIT;
1811        struct ref_transaction *transaction;
1812
1813        transaction = ref_transaction_begin(&err);
1814        if (!transaction) {
1815                failure |= error("%s", err.buf);
1816                goto cleanup;
1817        }
1818        for (t = first_tag; t; t = t->next_tag) {
1819                strbuf_reset(&ref_name);
1820                strbuf_addf(&ref_name, "refs/tags/%s", t->name);
1821
1822                if (ref_transaction_update(transaction, ref_name.buf,
1823                                           &t->oid, NULL, 0, msg, &err)) {
1824                        failure |= error("%s", err.buf);
1825                        goto cleanup;
1826                }
1827        }
1828        if (ref_transaction_commit(transaction, &err))
1829                failure |= error("%s", err.buf);
1830
1831 cleanup:
1832        ref_transaction_free(transaction);
1833        strbuf_release(&ref_name);
1834        strbuf_release(&err);
1835}
1836
1837static void dump_marks_helper(FILE *f,
1838        uintmax_t base,
1839        struct mark_set *m)
1840{
1841        uintmax_t k;
1842        if (m->shift) {
1843                for (k = 0; k < 1024; k++) {
1844                        if (m->data.sets[k])
1845                                dump_marks_helper(f, base + (k << m->shift),
1846                                        m->data.sets[k]);
1847                }
1848        } else {
1849                for (k = 0; k < 1024; k++) {
1850                        if (m->data.marked[k])
1851                                fprintf(f, ":%" PRIuMAX " %s\n", base + k,
1852                                        oid_to_hex(&m->data.marked[k]->idx.oid));
1853                }
1854        }
1855}
1856
1857static void dump_marks(void)
1858{
1859        static struct lock_file mark_lock;
1860        FILE *f;
1861
1862        if (!export_marks_file || (import_marks_file && !import_marks_file_done))
1863                return;
1864
1865        if (hold_lock_file_for_update(&mark_lock, export_marks_file, 0) < 0) {
1866                failure |= error_errno("Unable to write marks file %s",
1867                                       export_marks_file);
1868                return;
1869        }
1870
1871        f = fdopen_lock_file(&mark_lock, "w");
1872        if (!f) {
1873                int saved_errno = errno;
1874                rollback_lock_file(&mark_lock);
1875                failure |= error("Unable to write marks file %s: %s",
1876                        export_marks_file, strerror(saved_errno));
1877                return;
1878        }
1879
1880        dump_marks_helper(f, 0, marks);
1881        if (commit_lock_file(&mark_lock)) {
1882                failure |= error_errno("Unable to write file %s",
1883                                       export_marks_file);
1884                return;
1885        }
1886}
1887
1888static void read_marks(void)
1889{
1890        char line[512];
1891        FILE *f = fopen(import_marks_file, "r");
1892        if (f)
1893                ;
1894        else if (import_marks_file_ignore_missing && errno == ENOENT)
1895                goto done; /* Marks file does not exist */
1896        else
1897                die_errno("cannot read '%s'", import_marks_file);
1898        while (fgets(line, sizeof(line), f)) {
1899                uintmax_t mark;
1900                char *end;
1901                struct object_id oid;
1902                struct object_entry *e;
1903
1904                end = strchr(line, '\n');
1905                if (line[0] != ':' || !end)
1906                        die("corrupt mark line: %s", line);
1907                *end = 0;
1908                mark = strtoumax(line + 1, &end, 10);
1909                if (!mark || end == line + 1
1910                        || *end != ' ' || get_oid_hex(end + 1, &oid))
1911                        die("corrupt mark line: %s", line);
1912                e = find_object(&oid);
1913                if (!e) {
1914                        enum object_type type = sha1_object_info(oid.hash, NULL);
1915                        if (type < 0)
1916                                die("object not found: %s", oid_to_hex(&oid));
1917                        e = insert_object(&oid);
1918                        e->type = type;
1919                        e->pack_id = MAX_PACK_ID;
1920                        e->idx.offset = 1; /* just not zero! */
1921                }
1922                insert_mark(mark, e);
1923        }
1924        fclose(f);
1925done:
1926        import_marks_file_done = 1;
1927}
1928
1929
1930static int read_next_command(void)
1931{
1932        static int stdin_eof = 0;
1933
1934        if (stdin_eof) {
1935                unread_command_buf = 0;
1936                return EOF;
1937        }
1938
1939        for (;;) {
1940                const char *p;
1941
1942                if (unread_command_buf) {
1943                        unread_command_buf = 0;
1944                } else {
1945                        struct recent_command *rc;
1946
1947                        strbuf_detach(&command_buf, NULL);
1948                        stdin_eof = strbuf_getline_lf(&command_buf, stdin);
1949                        if (stdin_eof)
1950                                return EOF;
1951
1952                        if (!seen_data_command
1953                                && !starts_with(command_buf.buf, "feature ")
1954                                && !starts_with(command_buf.buf, "option ")) {
1955                                parse_argv();
1956                        }
1957
1958                        rc = rc_free;
1959                        if (rc)
1960                                rc_free = rc->next;
1961                        else {
1962                                rc = cmd_hist.next;
1963                                cmd_hist.next = rc->next;
1964                                cmd_hist.next->prev = &cmd_hist;
1965                                free(rc->buf);
1966                        }
1967
1968                        rc->buf = command_buf.buf;
1969                        rc->prev = cmd_tail;
1970                        rc->next = cmd_hist.prev;
1971                        rc->prev->next = rc;
1972                        cmd_tail = rc;
1973                }
1974                if (skip_prefix(command_buf.buf, "get-mark ", &p)) {
1975                        parse_get_mark(p);
1976                        continue;
1977                }
1978                if (skip_prefix(command_buf.buf, "cat-blob ", &p)) {
1979                        parse_cat_blob(p);
1980                        continue;
1981                }
1982                if (command_buf.buf[0] == '#')
1983                        continue;
1984                return 0;
1985        }
1986}
1987
1988static void skip_optional_lf(void)
1989{
1990        int term_char = fgetc(stdin);
1991        if (term_char != '\n' && term_char != EOF)
1992                ungetc(term_char, stdin);
1993}
1994
1995static void parse_mark(void)
1996{
1997        const char *v;
1998        if (skip_prefix(command_buf.buf, "mark :", &v)) {
1999                next_mark = strtoumax(v, NULL, 10);
2000                read_next_command();
2001        }
2002        else
2003                next_mark = 0;
2004}
2005
2006static int parse_data(struct strbuf *sb, uintmax_t limit, uintmax_t *len_res)
2007{
2008        const char *data;
2009        strbuf_reset(sb);
2010
2011        if (!skip_prefix(command_buf.buf, "data ", &data))
2012                die("Expected 'data n' command, found: %s", command_buf.buf);
2013
2014        if (skip_prefix(data, "<<", &data)) {
2015                char *term = xstrdup(data);
2016                size_t term_len = command_buf.len - (data - command_buf.buf);
2017
2018                strbuf_detach(&command_buf, NULL);
2019                for (;;) {
2020                        if (strbuf_getline_lf(&command_buf, stdin) == EOF)
2021                                die("EOF in data (terminator '%s' not found)", term);
2022                        if (term_len == command_buf.len
2023                                && !strcmp(term, command_buf.buf))
2024                                break;
2025                        strbuf_addbuf(sb, &command_buf);
2026                        strbuf_addch(sb, '\n');
2027                }
2028                free(term);
2029        }
2030        else {
2031                uintmax_t len = strtoumax(data, NULL, 10);
2032                size_t n = 0, length = (size_t)len;
2033
2034                if (limit && limit < len) {
2035                        *len_res = len;
2036                        return 0;
2037                }
2038                if (length < len)
2039                        die("data is too large to use in this context");
2040
2041                while (n < length) {
2042                        size_t s = strbuf_fread(sb, length - n, stdin);
2043                        if (!s && feof(stdin))
2044                                die("EOF in data (%lu bytes remaining)",
2045                                        (unsigned long)(length - n));
2046                        n += s;
2047                }
2048        }
2049
2050        skip_optional_lf();
2051        return 1;
2052}
2053
2054static int validate_raw_date(const char *src, struct strbuf *result)
2055{
2056        const char *orig_src = src;
2057        char *endp;
2058        unsigned long num;
2059
2060        errno = 0;
2061
2062        num = strtoul(src, &endp, 10);
2063        /* NEEDSWORK: perhaps check for reasonable values? */
2064        if (errno || endp == src || *endp != ' ')
2065                return -1;
2066
2067        src = endp + 1;
2068        if (*src != '-' && *src != '+')
2069                return -1;
2070
2071        num = strtoul(src + 1, &endp, 10);
2072        if (errno || endp == src + 1 || *endp || 1400 < num)
2073                return -1;
2074
2075        strbuf_addstr(result, orig_src);
2076        return 0;
2077}
2078
2079static char *parse_ident(const char *buf)
2080{
2081        const char *ltgt;
2082        size_t name_len;
2083        struct strbuf ident = STRBUF_INIT;
2084
2085        /* ensure there is a space delimiter even if there is no name */
2086        if (*buf == '<')
2087                --buf;
2088
2089        ltgt = buf + strcspn(buf, "<>");
2090        if (*ltgt != '<')
2091                die("Missing < in ident string: %s", buf);
2092        if (ltgt != buf && ltgt[-1] != ' ')
2093                die("Missing space before < in ident string: %s", buf);
2094        ltgt = ltgt + 1 + strcspn(ltgt + 1, "<>");
2095        if (*ltgt != '>')
2096                die("Missing > in ident string: %s", buf);
2097        ltgt++;
2098        if (*ltgt != ' ')
2099                die("Missing space after > in ident string: %s", buf);
2100        ltgt++;
2101        name_len = ltgt - buf;
2102        strbuf_add(&ident, buf, name_len);
2103
2104        switch (whenspec) {
2105        case WHENSPEC_RAW:
2106                if (validate_raw_date(ltgt, &ident) < 0)
2107                        die("Invalid raw date \"%s\" in ident: %s", ltgt, buf);
2108                break;
2109        case WHENSPEC_RFC2822:
2110                if (parse_date(ltgt, &ident) < 0)
2111                        die("Invalid rfc2822 date \"%s\" in ident: %s", ltgt, buf);
2112                break;
2113        case WHENSPEC_NOW:
2114                if (strcmp("now", ltgt))
2115                        die("Date in ident must be 'now': %s", buf);
2116                datestamp(&ident);
2117                break;
2118        }
2119
2120        return strbuf_detach(&ident, NULL);
2121}
2122
2123static void parse_and_store_blob(
2124        struct last_object *last,
2125        struct object_id *oidout,
2126        uintmax_t mark)
2127{
2128        static struct strbuf buf = STRBUF_INIT;
2129        uintmax_t len;
2130
2131        if (parse_data(&buf, big_file_threshold, &len))
2132                store_object(OBJ_BLOB, &buf, last, oidout, mark);
2133        else {
2134                if (last) {
2135                        strbuf_release(&last->data);
2136                        last->offset = 0;
2137                        last->depth = 0;
2138                }
2139                stream_blob(len, oidout, mark);
2140                skip_optional_lf();
2141        }
2142}
2143
2144static void parse_new_blob(void)
2145{
2146        read_next_command();
2147        parse_mark();
2148        parse_and_store_blob(&last_blob, NULL, next_mark);
2149}
2150
2151static void unload_one_branch(void)
2152{
2153        while (cur_active_branches
2154                && cur_active_branches >= max_active_branches) {
2155                uintmax_t min_commit = ULONG_MAX;
2156                struct branch *e, *l = NULL, *p = NULL;
2157
2158                for (e = active_branches; e; e = e->active_next_branch) {
2159                        if (e->last_commit < min_commit) {
2160                                p = l;
2161                                min_commit = e->last_commit;
2162                        }
2163                        l = e;
2164                }
2165
2166                if (p) {
2167                        e = p->active_next_branch;
2168                        p->active_next_branch = e->active_next_branch;
2169                } else {
2170                        e = active_branches;
2171                        active_branches = e->active_next_branch;
2172                }
2173                e->active = 0;
2174                e->active_next_branch = NULL;
2175                if (e->branch_tree.tree) {
2176                        release_tree_content_recursive(e->branch_tree.tree);
2177                        e->branch_tree.tree = NULL;
2178                }
2179                cur_active_branches--;
2180        }
2181}
2182
2183static void load_branch(struct branch *b)
2184{
2185        load_tree(&b->branch_tree);
2186        if (!b->active) {
2187                b->active = 1;
2188                b->active_next_branch = active_branches;
2189                active_branches = b;
2190                cur_active_branches++;
2191                branch_load_count++;
2192        }
2193}
2194
2195static unsigned char convert_num_notes_to_fanout(uintmax_t num_notes)
2196{
2197        unsigned char fanout = 0;
2198        while ((num_notes >>= 8))
2199                fanout++;
2200        return fanout;
2201}
2202
2203static void construct_path_with_fanout(const char *hex_sha1,
2204                unsigned char fanout, char *path)
2205{
2206        unsigned int i = 0, j = 0;
2207        if (fanout >= 20)
2208                die("Too large fanout (%u)", fanout);
2209        while (fanout) {
2210                path[i++] = hex_sha1[j++];
2211                path[i++] = hex_sha1[j++];
2212                path[i++] = '/';
2213                fanout--;
2214        }
2215        memcpy(path + i, hex_sha1 + j, GIT_SHA1_HEXSZ - j);
2216        path[i + GIT_SHA1_HEXSZ - j] = '\0';
2217}
2218
2219static uintmax_t do_change_note_fanout(
2220                struct tree_entry *orig_root, struct tree_entry *root,
2221                char *hex_oid, unsigned int hex_oid_len,
2222                char *fullpath, unsigned int fullpath_len,
2223                unsigned char fanout)
2224{
2225        struct tree_content *t;
2226        struct tree_entry *e, leaf;
2227        unsigned int i, tmp_hex_oid_len, tmp_fullpath_len;
2228        uintmax_t num_notes = 0;
2229        struct object_id oid;
2230        char realpath[60];
2231
2232        if (!root->tree)
2233                load_tree(root);
2234        t = root->tree;
2235
2236        for (i = 0; t && i < t->entry_count; i++) {
2237                e = t->entries[i];
2238                tmp_hex_oid_len = hex_oid_len + e->name->str_len;
2239                tmp_fullpath_len = fullpath_len;
2240
2241                /*
2242                 * We're interested in EITHER existing note entries (entries
2243                 * with exactly 40 hex chars in path, not including directory
2244                 * separators), OR directory entries that may contain note
2245                 * entries (with < 40 hex chars in path).
2246                 * Also, each path component in a note entry must be a multiple
2247                 * of 2 chars.
2248                 */
2249                if (!e->versions[1].mode ||
2250                    tmp_hex_oid_len > GIT_SHA1_HEXSZ ||
2251                    e->name->str_len % 2)
2252                        continue;
2253
2254                /* This _may_ be a note entry, or a subdir containing notes */
2255                memcpy(hex_oid + hex_oid_len, e->name->str_dat,
2256                       e->name->str_len);
2257                if (tmp_fullpath_len)
2258                        fullpath[tmp_fullpath_len++] = '/';
2259                memcpy(fullpath + tmp_fullpath_len, e->name->str_dat,
2260                       e->name->str_len);
2261                tmp_fullpath_len += e->name->str_len;
2262                fullpath[tmp_fullpath_len] = '\0';
2263
2264                if (tmp_hex_oid_len == GIT_SHA1_HEXSZ && !get_oid_hex(hex_oid, &oid)) {
2265                        /* This is a note entry */
2266                        if (fanout == 0xff) {
2267                                /* Counting mode, no rename */
2268                                num_notes++;
2269                                continue;
2270                        }
2271                        construct_path_with_fanout(hex_oid, fanout, realpath);
2272                        if (!strcmp(fullpath, realpath)) {
2273                                /* Note entry is in correct location */
2274                                num_notes++;
2275                                continue;
2276                        }
2277
2278                        /* Rename fullpath to realpath */
2279                        if (!tree_content_remove(orig_root, fullpath, &leaf, 0))
2280                                die("Failed to remove path %s", fullpath);
2281                        tree_content_set(orig_root, realpath,
2282                                &leaf.versions[1].oid,
2283                                leaf.versions[1].mode,
2284                                leaf.tree);
2285                } else if (S_ISDIR(e->versions[1].mode)) {
2286                        /* This is a subdir that may contain note entries */
2287                        num_notes += do_change_note_fanout(orig_root, e,
2288                                hex_oid, tmp_hex_oid_len,
2289                                fullpath, tmp_fullpath_len, fanout);
2290                }
2291
2292                /* The above may have reallocated the current tree_content */
2293                t = root->tree;
2294        }
2295        return num_notes;
2296}
2297
2298static uintmax_t change_note_fanout(struct tree_entry *root,
2299                unsigned char fanout)
2300{
2301        /*
2302         * The size of path is due to one slash between every two hex digits,
2303         * plus the terminating NUL.  Note that there is no slash at the end, so
2304         * the number of slashes is one less than half the number of hex
2305         * characters.
2306         */
2307        char hex_oid[GIT_MAX_HEXSZ], path[GIT_MAX_HEXSZ + (GIT_MAX_HEXSZ / 2) - 1 + 1];
2308        return do_change_note_fanout(root, root, hex_oid, 0, path, 0, fanout);
2309}
2310
2311/*
2312 * Given a pointer into a string, parse a mark reference:
2313 *
2314 *   idnum ::= ':' bigint;
2315 *
2316 * Return the first character after the value in *endptr.
2317 *
2318 * Complain if the following character is not what is expected,
2319 * either a space or end of the string.
2320 */
2321static uintmax_t parse_mark_ref(const char *p, char **endptr)
2322{
2323        uintmax_t mark;
2324
2325        assert(*p == ':');
2326        p++;
2327        mark = strtoumax(p, endptr, 10);
2328        if (*endptr == p)
2329                die("No value after ':' in mark: %s", command_buf.buf);
2330        return mark;
2331}
2332
2333/*
2334 * Parse the mark reference, and complain if this is not the end of
2335 * the string.
2336 */
2337static uintmax_t parse_mark_ref_eol(const char *p)
2338{
2339        char *end;
2340        uintmax_t mark;
2341
2342        mark = parse_mark_ref(p, &end);
2343        if (*end != '\0')
2344                die("Garbage after mark: %s", command_buf.buf);
2345        return mark;
2346}
2347
2348/*
2349 * Parse the mark reference, demanding a trailing space.  Return a
2350 * pointer to the space.
2351 */
2352static uintmax_t parse_mark_ref_space(const char **p)
2353{
2354        uintmax_t mark;
2355        char *end;
2356
2357        mark = parse_mark_ref(*p, &end);
2358        if (*end++ != ' ')
2359                die("Missing space after mark: %s", command_buf.buf);
2360        *p = end;
2361        return mark;
2362}
2363
2364static void file_change_m(const char *p, struct branch *b)
2365{
2366        static struct strbuf uq = STRBUF_INIT;
2367        const char *endp;
2368        struct object_entry *oe;
2369        struct object_id oid;
2370        uint16_t mode, inline_data = 0;
2371
2372        p = get_mode(p, &mode);
2373        if (!p)
2374                die("Corrupt mode: %s", command_buf.buf);
2375        switch (mode) {
2376        case 0644:
2377        case 0755:
2378                mode |= S_IFREG;
2379        case S_IFREG | 0644:
2380        case S_IFREG | 0755:
2381        case S_IFLNK:
2382        case S_IFDIR:
2383        case S_IFGITLINK:
2384                /* ok */
2385                break;
2386        default:
2387                die("Corrupt mode: %s", command_buf.buf);
2388        }
2389
2390        if (*p == ':') {
2391                oe = find_mark(parse_mark_ref_space(&p));
2392                oidcpy(&oid, &oe->idx.oid);
2393        } else if (skip_prefix(p, "inline ", &p)) {
2394                inline_data = 1;
2395                oe = NULL; /* not used with inline_data, but makes gcc happy */
2396        } else {
2397                if (parse_oid_hex(p, &oid, &p))
2398                        die("Invalid dataref: %s", command_buf.buf);
2399                oe = find_object(&oid);
2400                if (*p++ != ' ')
2401                        die("Missing space after SHA1: %s", command_buf.buf);
2402        }
2403
2404        strbuf_reset(&uq);
2405        if (!unquote_c_style(&uq, p, &endp)) {
2406                if (*endp)
2407                        die("Garbage after path in: %s", command_buf.buf);
2408                p = uq.buf;
2409        }
2410
2411        /* Git does not track empty, non-toplevel directories. */
2412        if (S_ISDIR(mode) && is_empty_tree_oid(&oid) && *p) {
2413                tree_content_remove(&b->branch_tree, p, NULL, 0);
2414                return;
2415        }
2416
2417        if (S_ISGITLINK(mode)) {
2418                if (inline_data)
2419                        die("Git links cannot be specified 'inline': %s",
2420                                command_buf.buf);
2421                else if (oe) {
2422                        if (oe->type != OBJ_COMMIT)
2423                                die("Not a commit (actually a %s): %s",
2424                                        typename(oe->type), command_buf.buf);
2425                }
2426                /*
2427                 * Accept the sha1 without checking; it expected to be in
2428                 * another repository.
2429                 */
2430        } else if (inline_data) {
2431                if (S_ISDIR(mode))
2432                        die("Directories cannot be specified 'inline': %s",
2433                                command_buf.buf);
2434                if (p != uq.buf) {
2435                        strbuf_addstr(&uq, p);
2436                        p = uq.buf;
2437                }
2438                read_next_command();
2439                parse_and_store_blob(&last_blob, &oid, 0);
2440        } else {
2441                enum object_type expected = S_ISDIR(mode) ?
2442                                                OBJ_TREE: OBJ_BLOB;
2443                enum object_type type = oe ? oe->type :
2444                                        sha1_object_info(oid.hash, NULL);
2445                if (type < 0)
2446                        die("%s not found: %s",
2447                                        S_ISDIR(mode) ?  "Tree" : "Blob",
2448                                        command_buf.buf);
2449                if (type != expected)
2450                        die("Not a %s (actually a %s): %s",
2451                                typename(expected), typename(type),
2452                                command_buf.buf);
2453        }
2454
2455        if (!*p) {
2456                tree_content_replace(&b->branch_tree, &oid, mode, NULL);
2457                return;
2458        }
2459        tree_content_set(&b->branch_tree, p, &oid, mode, NULL);
2460}
2461
2462static void file_change_d(const char *p, struct branch *b)
2463{
2464        static struct strbuf uq = STRBUF_INIT;
2465        const char *endp;
2466
2467        strbuf_reset(&uq);
2468        if (!unquote_c_style(&uq, p, &endp)) {
2469                if (*endp)
2470                        die("Garbage after path in: %s", command_buf.buf);
2471                p = uq.buf;
2472        }
2473        tree_content_remove(&b->branch_tree, p, NULL, 1);
2474}
2475
2476static void file_change_cr(const char *s, struct branch *b, int rename)
2477{
2478        const char *d;
2479        static struct strbuf s_uq = STRBUF_INIT;
2480        static struct strbuf d_uq = STRBUF_INIT;
2481        const char *endp;
2482        struct tree_entry leaf;
2483
2484        strbuf_reset(&s_uq);
2485        if (!unquote_c_style(&s_uq, s, &endp)) {
2486                if (*endp != ' ')
2487                        die("Missing space after source: %s", command_buf.buf);
2488        } else {
2489                endp = strchr(s, ' ');
2490                if (!endp)
2491                        die("Missing space after source: %s", command_buf.buf);
2492                strbuf_add(&s_uq, s, endp - s);
2493        }
2494        s = s_uq.buf;
2495
2496        endp++;
2497        if (!*endp)
2498                die("Missing dest: %s", command_buf.buf);
2499
2500        d = endp;
2501        strbuf_reset(&d_uq);
2502        if (!unquote_c_style(&d_uq, d, &endp)) {
2503                if (*endp)
2504                        die("Garbage after dest in: %s", command_buf.buf);
2505                d = d_uq.buf;
2506        }
2507
2508        memset(&leaf, 0, sizeof(leaf));
2509        if (rename)
2510                tree_content_remove(&b->branch_tree, s, &leaf, 1);
2511        else
2512                tree_content_get(&b->branch_tree, s, &leaf, 1);
2513        if (!leaf.versions[1].mode)
2514                die("Path %s not in branch", s);
2515        if (!*d) {      /* C "path/to/subdir" "" */
2516                tree_content_replace(&b->branch_tree,
2517                        &leaf.versions[1].oid,
2518                        leaf.versions[1].mode,
2519                        leaf.tree);
2520                return;
2521        }
2522        tree_content_set(&b->branch_tree, d,
2523                &leaf.versions[1].oid,
2524                leaf.versions[1].mode,
2525                leaf.tree);
2526}
2527
2528static void note_change_n(const char *p, struct branch *b, unsigned char *old_fanout)
2529{
2530        static struct strbuf uq = STRBUF_INIT;
2531        struct object_entry *oe;
2532        struct branch *s;
2533        struct object_id oid, commit_oid;
2534        char path[60];
2535        uint16_t inline_data = 0;
2536        unsigned char new_fanout;
2537
2538        /*
2539         * When loading a branch, we don't traverse its tree to count the real
2540         * number of notes (too expensive to do this for all non-note refs).
2541         * This means that recently loaded notes refs might incorrectly have
2542         * b->num_notes == 0, and consequently, old_fanout might be wrong.
2543         *
2544         * Fix this by traversing the tree and counting the number of notes
2545         * when b->num_notes == 0. If the notes tree is truly empty, the
2546         * calculation should not take long.
2547         */
2548        if (b->num_notes == 0 && *old_fanout == 0) {
2549                /* Invoke change_note_fanout() in "counting mode". */
2550                b->num_notes = change_note_fanout(&b->branch_tree, 0xff);
2551                *old_fanout = convert_num_notes_to_fanout(b->num_notes);
2552        }
2553
2554        /* Now parse the notemodify command. */
2555        /* <dataref> or 'inline' */
2556        if (*p == ':') {
2557                oe = find_mark(parse_mark_ref_space(&p));
2558                oidcpy(&oid, &oe->idx.oid);
2559        } else if (skip_prefix(p, "inline ", &p)) {
2560                inline_data = 1;
2561                oe = NULL; /* not used with inline_data, but makes gcc happy */
2562        } else {
2563                if (parse_oid_hex(p, &oid, &p))
2564                        die("Invalid dataref: %s", command_buf.buf);
2565                oe = find_object(&oid);
2566                if (*p++ != ' ')
2567                        die("Missing space after SHA1: %s", command_buf.buf);
2568        }
2569
2570        /* <commit-ish> */
2571        s = lookup_branch(p);
2572        if (s) {
2573                if (is_null_oid(&s->oid))
2574                        die("Can't add a note on empty branch.");
2575                oidcpy(&commit_oid, &s->oid);
2576        } else if (*p == ':') {
2577                uintmax_t commit_mark = parse_mark_ref_eol(p);
2578                struct object_entry *commit_oe = find_mark(commit_mark);
2579                if (commit_oe->type != OBJ_COMMIT)
2580                        die("Mark :%" PRIuMAX " not a commit", commit_mark);
2581                oidcpy(&commit_oid, &commit_oe->idx.oid);
2582        } else if (!get_oid(p, &commit_oid)) {
2583                unsigned long size;
2584                char *buf = read_object_with_reference(commit_oid.hash,
2585                        commit_type, &size, commit_oid.hash);
2586                if (!buf || size < 46)
2587                        die("Not a valid commit: %s", p);
2588                free(buf);
2589        } else
2590                die("Invalid ref name or SHA1 expression: %s", p);
2591
2592        if (inline_data) {
2593                if (p != uq.buf) {
2594                        strbuf_addstr(&uq, p);
2595                        p = uq.buf;
2596                }
2597                read_next_command();
2598                parse_and_store_blob(&last_blob, &oid, 0);
2599        } else if (oe) {
2600                if (oe->type != OBJ_BLOB)
2601                        die("Not a blob (actually a %s): %s",
2602                                typename(oe->type), command_buf.buf);
2603        } else if (!is_null_oid(&oid)) {
2604                enum object_type type = sha1_object_info(oid.hash, NULL);
2605                if (type < 0)
2606                        die("Blob not found: %s", command_buf.buf);
2607                if (type != OBJ_BLOB)
2608                        die("Not a blob (actually a %s): %s",
2609                            typename(type), command_buf.buf);
2610        }
2611
2612        construct_path_with_fanout(oid_to_hex(&commit_oid), *old_fanout, path);
2613        if (tree_content_remove(&b->branch_tree, path, NULL, 0))
2614                b->num_notes--;
2615
2616        if (is_null_oid(&oid))
2617                return; /* nothing to insert */
2618
2619        b->num_notes++;
2620        new_fanout = convert_num_notes_to_fanout(b->num_notes);
2621        construct_path_with_fanout(oid_to_hex(&commit_oid), new_fanout, path);
2622        tree_content_set(&b->branch_tree, path, &oid, S_IFREG | 0644, NULL);
2623}
2624
2625static void file_change_deleteall(struct branch *b)
2626{
2627        release_tree_content_recursive(b->branch_tree.tree);
2628        oidclr(&b->branch_tree.versions[0].oid);
2629        oidclr(&b->branch_tree.versions[1].oid);
2630        load_tree(&b->branch_tree);
2631        b->num_notes = 0;
2632}
2633
2634static void parse_from_commit(struct branch *b, char *buf, unsigned long size)
2635{
2636        if (!buf || size < GIT_SHA1_HEXSZ + 6)
2637                die("Not a valid commit: %s", oid_to_hex(&b->oid));
2638        if (memcmp("tree ", buf, 5)
2639                || get_oid_hex(buf + 5, &b->branch_tree.versions[1].oid))
2640                die("The commit %s is corrupt", oid_to_hex(&b->oid));
2641        oidcpy(&b->branch_tree.versions[0].oid,
2642               &b->branch_tree.versions[1].oid);
2643}
2644
2645static void parse_from_existing(struct branch *b)
2646{
2647        if (is_null_oid(&b->oid)) {
2648                oidclr(&b->branch_tree.versions[0].oid);
2649                oidclr(&b->branch_tree.versions[1].oid);
2650        } else {
2651                unsigned long size;
2652                char *buf;
2653
2654                buf = read_object_with_reference(b->oid.hash,
2655                                                 commit_type, &size,
2656                                                 b->oid.hash);
2657                parse_from_commit(b, buf, size);
2658                free(buf);
2659        }
2660}
2661
2662static int parse_from(struct branch *b)
2663{
2664        const char *from;
2665        struct branch *s;
2666        struct object_id oid;
2667
2668        if (!skip_prefix(command_buf.buf, "from ", &from))
2669                return 0;
2670
2671        oidcpy(&oid, &b->branch_tree.versions[1].oid);
2672
2673        s = lookup_branch(from);
2674        if (b == s)
2675                die("Can't create a branch from itself: %s", b->name);
2676        else if (s) {
2677                struct object_id *t = &s->branch_tree.versions[1].oid;
2678                oidcpy(&b->oid, &s->oid);
2679                oidcpy(&b->branch_tree.versions[0].oid, t);
2680                oidcpy(&b->branch_tree.versions[1].oid, t);
2681        } else if (*from == ':') {
2682                uintmax_t idnum = parse_mark_ref_eol(from);
2683                struct object_entry *oe = find_mark(idnum);
2684                if (oe->type != OBJ_COMMIT)
2685                        die("Mark :%" PRIuMAX " not a commit", idnum);
2686                if (oidcmp(&b->oid, &oe->idx.oid)) {
2687                        oidcpy(&b->oid, &oe->idx.oid);
2688                        if (oe->pack_id != MAX_PACK_ID) {
2689                                unsigned long size;
2690                                char *buf = gfi_unpack_entry(oe, &size);
2691                                parse_from_commit(b, buf, size);
2692                                free(buf);
2693                        } else
2694                                parse_from_existing(b);
2695                }
2696        } else if (!get_oid(from, &b->oid)) {
2697                parse_from_existing(b);
2698                if (is_null_oid(&b->oid))
2699                        b->delete = 1;
2700        }
2701        else
2702                die("Invalid ref name or SHA1 expression: %s", from);
2703
2704        if (b->branch_tree.tree && oidcmp(&oid, &b->branch_tree.versions[1].oid)) {
2705                release_tree_content_recursive(b->branch_tree.tree);
2706                b->branch_tree.tree = NULL;
2707        }
2708
2709        read_next_command();
2710        return 1;
2711}
2712
2713static struct hash_list *parse_merge(unsigned int *count)
2714{
2715        struct hash_list *list = NULL, **tail = &list, *n;
2716        const char *from;
2717        struct branch *s;
2718
2719        *count = 0;
2720        while (skip_prefix(command_buf.buf, "merge ", &from)) {
2721                n = xmalloc(sizeof(*n));
2722                s = lookup_branch(from);
2723                if (s)
2724                        oidcpy(&n->oid, &s->oid);
2725                else if (*from == ':') {
2726                        uintmax_t idnum = parse_mark_ref_eol(from);
2727                        struct object_entry *oe = find_mark(idnum);
2728                        if (oe->type != OBJ_COMMIT)
2729                                die("Mark :%" PRIuMAX " not a commit", idnum);
2730                        oidcpy(&n->oid, &oe->idx.oid);
2731                } else if (!get_oid(from, &n->oid)) {
2732                        unsigned long size;
2733                        char *buf = read_object_with_reference(n->oid.hash,
2734                                commit_type, &size, n->oid.hash);
2735                        if (!buf || size < 46)
2736                                die("Not a valid commit: %s", from);
2737                        free(buf);
2738                } else
2739                        die("Invalid ref name or SHA1 expression: %s", from);
2740
2741                n->next = NULL;
2742                *tail = n;
2743                tail = &n->next;
2744
2745                (*count)++;
2746                read_next_command();
2747        }
2748        return list;
2749}
2750
2751static void parse_new_commit(const char *arg)
2752{
2753        static struct strbuf msg = STRBUF_INIT;
2754        struct branch *b;
2755        char *author = NULL;
2756        char *committer = NULL;
2757        struct hash_list *merge_list = NULL;
2758        unsigned int merge_count;
2759        unsigned char prev_fanout, new_fanout;
2760        const char *v;
2761
2762        b = lookup_branch(arg);
2763        if (!b)
2764                b = new_branch(arg);
2765
2766        read_next_command();
2767        parse_mark();
2768        if (skip_prefix(command_buf.buf, "author ", &v)) {
2769                author = parse_ident(v);
2770                read_next_command();
2771        }
2772        if (skip_prefix(command_buf.buf, "committer ", &v)) {
2773                committer = parse_ident(v);
2774                read_next_command();
2775        }
2776        if (!committer)
2777                die("Expected committer but didn't get one");
2778        parse_data(&msg, 0, NULL);
2779        read_next_command();
2780        parse_from(b);
2781        merge_list = parse_merge(&merge_count);
2782
2783        /* ensure the branch is active/loaded */
2784        if (!b->branch_tree.tree || !max_active_branches) {
2785                unload_one_branch();
2786                load_branch(b);
2787        }
2788
2789        prev_fanout = convert_num_notes_to_fanout(b->num_notes);
2790
2791        /* file_change* */
2792        while (command_buf.len > 0) {
2793                if (skip_prefix(command_buf.buf, "M ", &v))
2794                        file_change_m(v, b);
2795                else if (skip_prefix(command_buf.buf, "D ", &v))
2796                        file_change_d(v, b);
2797                else if (skip_prefix(command_buf.buf, "R ", &v))
2798                        file_change_cr(v, b, 1);
2799                else if (skip_prefix(command_buf.buf, "C ", &v))
2800                        file_change_cr(v, b, 0);
2801                else if (skip_prefix(command_buf.buf, "N ", &v))
2802                        note_change_n(v, b, &prev_fanout);
2803                else if (!strcmp("deleteall", command_buf.buf))
2804                        file_change_deleteall(b);
2805                else if (skip_prefix(command_buf.buf, "ls ", &v))
2806                        parse_ls(v, b);
2807                else {
2808                        unread_command_buf = 1;
2809                        break;
2810                }
2811                if (read_next_command() == EOF)
2812                        break;
2813        }
2814
2815        new_fanout = convert_num_notes_to_fanout(b->num_notes);
2816        if (new_fanout != prev_fanout)
2817                b->num_notes = change_note_fanout(&b->branch_tree, new_fanout);
2818
2819        /* build the tree and the commit */
2820        store_tree(&b->branch_tree);
2821        oidcpy(&b->branch_tree.versions[0].oid,
2822               &b->branch_tree.versions[1].oid);
2823
2824        strbuf_reset(&new_data);
2825        strbuf_addf(&new_data, "tree %s\n",
2826                oid_to_hex(&b->branch_tree.versions[1].oid));
2827        if (!is_null_oid(&b->oid))
2828                strbuf_addf(&new_data, "parent %s\n",
2829                            oid_to_hex(&b->oid));
2830        while (merge_list) {
2831                struct hash_list *next = merge_list->next;
2832                strbuf_addf(&new_data, "parent %s\n",
2833                            oid_to_hex(&merge_list->oid));
2834                free(merge_list);
2835                merge_list = next;
2836        }
2837        strbuf_addf(&new_data,
2838                "author %s\n"
2839                "committer %s\n"
2840                "\n",
2841                author ? author : committer, committer);
2842        strbuf_addbuf(&new_data, &msg);
2843        free(author);
2844        free(committer);
2845
2846        if (!store_object(OBJ_COMMIT, &new_data, NULL, &b->oid, next_mark))
2847                b->pack_id = pack_id;
2848        b->last_commit = object_count_by_type[OBJ_COMMIT];
2849}
2850
2851static void parse_new_tag(const char *arg)
2852{
2853        static struct strbuf msg = STRBUF_INIT;
2854        const char *from;
2855        char *tagger;
2856        struct branch *s;
2857        struct tag *t;
2858        uintmax_t from_mark = 0;
2859        struct object_id oid;
2860        enum object_type type;
2861        const char *v;
2862
2863        t = pool_alloc(sizeof(struct tag));
2864        memset(t, 0, sizeof(struct tag));
2865        t->name = pool_strdup(arg);
2866        if (last_tag)
2867                last_tag->next_tag = t;
2868        else
2869                first_tag = t;
2870        last_tag = t;
2871        read_next_command();
2872
2873        /* from ... */
2874        if (!skip_prefix(command_buf.buf, "from ", &from))
2875                die("Expected from command, got %s", command_buf.buf);
2876        s = lookup_branch(from);
2877        if (s) {
2878                if (is_null_oid(&s->oid))
2879                        die("Can't tag an empty branch.");
2880                oidcpy(&oid, &s->oid);
2881                type = OBJ_COMMIT;
2882        } else if (*from == ':') {
2883                struct object_entry *oe;
2884                from_mark = parse_mark_ref_eol(from);
2885                oe = find_mark(from_mark);
2886                type = oe->type;
2887                oidcpy(&oid, &oe->idx.oid);
2888        } else if (!get_oid(from, &oid)) {
2889                struct object_entry *oe = find_object(&oid);
2890                if (!oe) {
2891                        type = sha1_object_info(oid.hash, NULL);
2892                        if (type < 0)
2893                                die("Not a valid object: %s", from);
2894                } else
2895                        type = oe->type;
2896        } else
2897                die("Invalid ref name or SHA1 expression: %s", from);
2898        read_next_command();
2899
2900        /* tagger ... */
2901        if (skip_prefix(command_buf.buf, "tagger ", &v)) {
2902                tagger = parse_ident(v);
2903                read_next_command();
2904        } else
2905                tagger = NULL;
2906
2907        /* tag payload/message */
2908        parse_data(&msg, 0, NULL);
2909
2910        /* build the tag object */
2911        strbuf_reset(&new_data);
2912
2913        strbuf_addf(&new_data,
2914                    "object %s\n"
2915                    "type %s\n"
2916                    "tag %s\n",
2917                    oid_to_hex(&oid), typename(type), t->name);
2918        if (tagger)
2919                strbuf_addf(&new_data,
2920                            "tagger %s\n", tagger);
2921        strbuf_addch(&new_data, '\n');
2922        strbuf_addbuf(&new_data, &msg);
2923        free(tagger);
2924
2925        if (store_object(OBJ_TAG, &new_data, NULL, &t->oid, 0))
2926                t->pack_id = MAX_PACK_ID;
2927        else
2928                t->pack_id = pack_id;
2929}
2930
2931static void parse_reset_branch(const char *arg)
2932{
2933        struct branch *b;
2934
2935        b = lookup_branch(arg);
2936        if (b) {
2937                oidclr(&b->oid);
2938                oidclr(&b->branch_tree.versions[0].oid);
2939                oidclr(&b->branch_tree.versions[1].oid);
2940                if (b->branch_tree.tree) {
2941                        release_tree_content_recursive(b->branch_tree.tree);
2942                        b->branch_tree.tree = NULL;
2943                }
2944        }
2945        else
2946                b = new_branch(arg);
2947        read_next_command();
2948        parse_from(b);
2949        if (command_buf.len > 0)
2950                unread_command_buf = 1;
2951}
2952
2953static void cat_blob_write(const char *buf, unsigned long size)
2954{
2955        if (write_in_full(cat_blob_fd, buf, size) < 0)
2956                die_errno("Write to frontend failed");
2957}
2958
2959static void cat_blob(struct object_entry *oe, struct object_id *oid)
2960{
2961        struct strbuf line = STRBUF_INIT;
2962        unsigned long size;
2963        enum object_type type = 0;
2964        char *buf;
2965
2966        if (!oe || oe->pack_id == MAX_PACK_ID) {
2967                buf = read_sha1_file(oid->hash, &type, &size);
2968        } else {
2969                type = oe->type;
2970                buf = gfi_unpack_entry(oe, &size);
2971        }
2972
2973        /*
2974         * Output based on batch_one_object() from cat-file.c.
2975         */
2976        if (type <= 0) {
2977                strbuf_reset(&line);
2978                strbuf_addf(&line, "%s missing\n", oid_to_hex(oid));
2979                cat_blob_write(line.buf, line.len);
2980                strbuf_release(&line);
2981                free(buf);
2982                return;
2983        }
2984        if (!buf)
2985                die("Can't read object %s", oid_to_hex(oid));
2986        if (type != OBJ_BLOB)
2987                die("Object %s is a %s but a blob was expected.",
2988                    oid_to_hex(oid), typename(type));
2989        strbuf_reset(&line);
2990        strbuf_addf(&line, "%s %s %lu\n", oid_to_hex(oid),
2991                                                typename(type), size);
2992        cat_blob_write(line.buf, line.len);
2993        strbuf_release(&line);
2994        cat_blob_write(buf, size);
2995        cat_blob_write("\n", 1);
2996        if (oe && oe->pack_id == pack_id) {
2997                last_blob.offset = oe->idx.offset;
2998                strbuf_attach(&last_blob.data, buf, size, size);
2999                last_blob.depth = oe->depth;
3000        } else
3001                free(buf);
3002}
3003
3004static void parse_get_mark(const char *p)
3005{
3006        struct object_entry *oe = oe;
3007        char output[GIT_MAX_HEXSZ + 2];
3008
3009        /* get-mark SP <object> LF */
3010        if (*p != ':')
3011                die("Not a mark: %s", p);
3012
3013        oe = find_mark(parse_mark_ref_eol(p));
3014        if (!oe)
3015                die("Unknown mark: %s", command_buf.buf);
3016
3017        xsnprintf(output, sizeof(output), "%s\n", oid_to_hex(&oe->idx.oid));
3018        cat_blob_write(output, GIT_SHA1_HEXSZ + 1);
3019}
3020
3021static void parse_cat_blob(const char *p)
3022{
3023        struct object_entry *oe = oe;
3024        struct object_id oid;
3025
3026        /* cat-blob SP <object> LF */
3027        if (*p == ':') {
3028                oe = find_mark(parse_mark_ref_eol(p));
3029                if (!oe)
3030                        die("Unknown mark: %s", command_buf.buf);
3031                oidcpy(&oid, &oe->idx.oid);
3032        } else {
3033                if (parse_oid_hex(p, &oid, &p))
3034                        die("Invalid dataref: %s", command_buf.buf);
3035                if (*p)
3036                        die("Garbage after SHA1: %s", command_buf.buf);
3037                oe = find_object(&oid);
3038        }
3039
3040        cat_blob(oe, &oid);
3041}
3042
3043static struct object_entry *dereference(struct object_entry *oe,
3044                                        struct object_id *oid)
3045{
3046        unsigned long size;
3047        char *buf = NULL;
3048        if (!oe) {
3049                enum object_type type = sha1_object_info(oid->hash, NULL);
3050                if (type < 0)
3051                        die("object not found: %s", oid_to_hex(oid));
3052                /* cache it! */
3053                oe = insert_object(oid);
3054                oe->type = type;
3055                oe->pack_id = MAX_PACK_ID;
3056                oe->idx.offset = 1;
3057        }
3058        switch (oe->type) {
3059        case OBJ_TREE:  /* easy case. */
3060                return oe;
3061        case OBJ_COMMIT:
3062        case OBJ_TAG:
3063                break;
3064        default:
3065                die("Not a tree-ish: %s", command_buf.buf);
3066        }
3067
3068        if (oe->pack_id != MAX_PACK_ID) {       /* in a pack being written */
3069                buf = gfi_unpack_entry(oe, &size);
3070        } else {
3071                enum object_type unused;
3072                buf = read_sha1_file(oid->hash, &unused, &size);
3073        }
3074        if (!buf)
3075                die("Can't load object %s", oid_to_hex(oid));
3076
3077        /* Peel one layer. */
3078        switch (oe->type) {
3079        case OBJ_TAG:
3080                if (size < GIT_SHA1_HEXSZ + strlen("object ") ||
3081                    get_oid_hex(buf + strlen("object "), oid))
3082                        die("Invalid SHA1 in tag: %s", command_buf.buf);
3083                break;
3084        case OBJ_COMMIT:
3085                if (size < GIT_SHA1_HEXSZ + strlen("tree ") ||
3086                    get_oid_hex(buf + strlen("tree "), oid))
3087                        die("Invalid SHA1 in commit: %s", command_buf.buf);
3088        }
3089
3090        free(buf);
3091        return find_object(oid);
3092}
3093
3094static struct object_entry *parse_treeish_dataref(const char **p)
3095{
3096        struct object_id oid;
3097        struct object_entry *e;
3098
3099        if (**p == ':') {       /* <mark> */
3100                e = find_mark(parse_mark_ref_space(p));
3101                if (!e)
3102                        die("Unknown mark: %s", command_buf.buf);
3103                oidcpy(&oid, &e->idx.oid);
3104        } else {        /* <sha1> */
3105                if (parse_oid_hex(*p, &oid, p))
3106                        die("Invalid dataref: %s", command_buf.buf);
3107                e = find_object(&oid);
3108                if (*(*p)++ != ' ')
3109                        die("Missing space after tree-ish: %s", command_buf.buf);
3110        }
3111
3112        while (!e || e->type != OBJ_TREE)
3113                e = dereference(e, &oid);
3114        return e;
3115}
3116
3117static void print_ls(int mode, const unsigned char *sha1, const char *path)
3118{
3119        static struct strbuf line = STRBUF_INIT;
3120
3121        /* See show_tree(). */
3122        const char *type =
3123                S_ISGITLINK(mode) ? commit_type :
3124                S_ISDIR(mode) ? tree_type :
3125                blob_type;
3126
3127        if (!mode) {
3128                /* missing SP path LF */
3129                strbuf_reset(&line);
3130                strbuf_addstr(&line, "missing ");
3131                quote_c_style(path, &line, NULL, 0);
3132                strbuf_addch(&line, '\n');
3133        } else {
3134                /* mode SP type SP object_name TAB path LF */
3135                strbuf_reset(&line);
3136                strbuf_addf(&line, "%06o %s %s\t",
3137                                mode & ~NO_DELTA, type, sha1_to_hex(sha1));
3138                quote_c_style(path, &line, NULL, 0);
3139                strbuf_addch(&line, '\n');
3140        }
3141        cat_blob_write(line.buf, line.len);
3142}
3143
3144static void parse_ls(const char *p, struct branch *b)
3145{
3146        struct tree_entry *root = NULL;
3147        struct tree_entry leaf = {NULL};
3148
3149        /* ls SP (<tree-ish> SP)? <path> */
3150        if (*p == '"') {
3151                if (!b)
3152                        die("Not in a commit: %s", command_buf.buf);
3153                root = &b->branch_tree;
3154        } else {
3155                struct object_entry *e = parse_treeish_dataref(&p);
3156                root = new_tree_entry();
3157                oidcpy(&root->versions[1].oid, &e->idx.oid);
3158                if (!is_null_oid(&root->versions[1].oid))
3159                        root->versions[1].mode = S_IFDIR;
3160                load_tree(root);
3161        }
3162        if (*p == '"') {
3163                static struct strbuf uq = STRBUF_INIT;
3164                const char *endp;
3165                strbuf_reset(&uq);
3166                if (unquote_c_style(&uq, p, &endp))
3167                        die("Invalid path: %s", command_buf.buf);
3168                if (*endp)
3169                        die("Garbage after path in: %s", command_buf.buf);
3170                p = uq.buf;
3171        }
3172        tree_content_get(root, p, &leaf, 1);
3173        /*
3174         * A directory in preparation would have a sha1 of zero
3175         * until it is saved.  Save, for simplicity.
3176         */
3177        if (S_ISDIR(leaf.versions[1].mode))
3178                store_tree(&leaf);
3179
3180        print_ls(leaf.versions[1].mode, leaf.versions[1].oid.hash, p);
3181        if (leaf.tree)
3182                release_tree_content_recursive(leaf.tree);
3183        if (!b || root != &b->branch_tree)
3184                release_tree_entry(root);
3185}
3186
3187static void checkpoint(void)
3188{
3189        checkpoint_requested = 0;
3190        if (object_count) {
3191                cycle_packfile();
3192        }
3193        dump_branches();
3194        dump_tags();
3195        dump_marks();
3196}
3197
3198static void parse_checkpoint(void)
3199{
3200        checkpoint_requested = 1;
3201        skip_optional_lf();
3202}
3203
3204static void parse_progress(void)
3205{
3206        fwrite(command_buf.buf, 1, command_buf.len, stdout);
3207        fputc('\n', stdout);
3208        fflush(stdout);
3209        skip_optional_lf();
3210}
3211
3212static char* make_fast_import_path(const char *path)
3213{
3214        if (!relative_marks_paths || is_absolute_path(path))
3215                return xstrdup(path);
3216        return git_pathdup("info/fast-import/%s", path);
3217}
3218
3219static void option_import_marks(const char *marks,
3220                                        int from_stream, int ignore_missing)
3221{
3222        if (import_marks_file) {
3223                if (from_stream)
3224                        die("Only one import-marks command allowed per stream");
3225
3226                /* read previous mark file */
3227                if(!import_marks_file_from_stream)
3228                        read_marks();
3229        }
3230
3231        import_marks_file = make_fast_import_path(marks);
3232        safe_create_leading_directories_const(import_marks_file);
3233        import_marks_file_from_stream = from_stream;
3234        import_marks_file_ignore_missing = ignore_missing;
3235}
3236
3237static void option_date_format(const char *fmt)
3238{
3239        if (!strcmp(fmt, "raw"))
3240                whenspec = WHENSPEC_RAW;
3241        else if (!strcmp(fmt, "rfc2822"))
3242                whenspec = WHENSPEC_RFC2822;
3243        else if (!strcmp(fmt, "now"))
3244                whenspec = WHENSPEC_NOW;
3245        else
3246                die("unknown --date-format argument %s", fmt);
3247}
3248
3249static unsigned long ulong_arg(const char *option, const char *arg)
3250{
3251        char *endptr;
3252        unsigned long rv = strtoul(arg, &endptr, 0);
3253        if (strchr(arg, '-') || endptr == arg || *endptr)
3254                die("%s: argument must be a non-negative integer", option);
3255        return rv;
3256}
3257
3258static void option_depth(const char *depth)
3259{
3260        max_depth = ulong_arg("--depth", depth);
3261        if (max_depth > MAX_DEPTH)
3262                die("--depth cannot exceed %u", MAX_DEPTH);
3263}
3264
3265static void option_active_branches(const char *branches)
3266{
3267        max_active_branches = ulong_arg("--active-branches", branches);
3268}
3269
3270static void option_export_marks(const char *marks)
3271{
3272        export_marks_file = make_fast_import_path(marks);
3273        safe_create_leading_directories_const(export_marks_file);
3274}
3275
3276static void option_cat_blob_fd(const char *fd)
3277{
3278        unsigned long n = ulong_arg("--cat-blob-fd", fd);
3279        if (n > (unsigned long) INT_MAX)
3280                die("--cat-blob-fd cannot exceed %d", INT_MAX);
3281        cat_blob_fd = (int) n;
3282}
3283
3284static void option_export_pack_edges(const char *edges)
3285{
3286        if (pack_edges)
3287                fclose(pack_edges);
3288        pack_edges = xfopen(edges, "a");
3289}
3290
3291static int parse_one_option(const char *option)
3292{
3293        if (skip_prefix(option, "max-pack-size=", &option)) {
3294                unsigned long v;
3295                if (!git_parse_ulong(option, &v))
3296                        return 0;
3297                if (v < 8192) {
3298                        warning("max-pack-size is now in bytes, assuming --max-pack-size=%lum", v);
3299                        v *= 1024 * 1024;
3300                } else if (v < 1024 * 1024) {
3301                        warning("minimum max-pack-size is 1 MiB");
3302                        v = 1024 * 1024;
3303                }
3304                max_packsize = v;
3305        } else if (skip_prefix(option, "big-file-threshold=", &option)) {
3306                unsigned long v;
3307                if (!git_parse_ulong(option, &v))
3308                        return 0;
3309                big_file_threshold = v;
3310        } else if (skip_prefix(option, "depth=", &option)) {
3311                option_depth(option);
3312        } else if (skip_prefix(option, "active-branches=", &option)) {
3313                option_active_branches(option);
3314        } else if (skip_prefix(option, "export-pack-edges=", &option)) {
3315                option_export_pack_edges(option);
3316        } else if (starts_with(option, "quiet")) {
3317                show_stats = 0;
3318        } else if (starts_with(option, "stats")) {
3319                show_stats = 1;
3320        } else {
3321                return 0;
3322        }
3323
3324        return 1;
3325}
3326
3327static int parse_one_feature(const char *feature, int from_stream)
3328{
3329        const char *arg;
3330
3331        if (skip_prefix(feature, "date-format=", &arg)) {
3332                option_date_format(arg);
3333        } else if (skip_prefix(feature, "import-marks=", &arg)) {
3334                option_import_marks(arg, from_stream, 0);
3335        } else if (skip_prefix(feature, "import-marks-if-exists=", &arg)) {
3336                option_import_marks(arg, from_stream, 1);
3337        } else if (skip_prefix(feature, "export-marks=", &arg)) {
3338                option_export_marks(arg);
3339        } else if (!strcmp(feature, "get-mark")) {
3340                ; /* Don't die - this feature is supported */
3341        } else if (!strcmp(feature, "cat-blob")) {
3342                ; /* Don't die - this feature is supported */
3343        } else if (!strcmp(feature, "relative-marks")) {
3344                relative_marks_paths = 1;
3345        } else if (!strcmp(feature, "no-relative-marks")) {
3346                relative_marks_paths = 0;
3347        } else if (!strcmp(feature, "done")) {
3348                require_explicit_termination = 1;
3349        } else if (!strcmp(feature, "force")) {
3350                force_update = 1;
3351        } else if (!strcmp(feature, "notes") || !strcmp(feature, "ls")) {
3352                ; /* do nothing; we have the feature */
3353        } else {
3354                return 0;
3355        }
3356
3357        return 1;
3358}
3359
3360static void parse_feature(const char *feature)
3361{
3362        if (seen_data_command)
3363                die("Got feature command '%s' after data command", feature);
3364
3365        if (parse_one_feature(feature, 1))
3366                return;
3367
3368        die("This version of fast-import does not support feature %s.", feature);
3369}
3370
3371static void parse_option(const char *option)
3372{
3373        if (seen_data_command)
3374                die("Got option command '%s' after data command", option);
3375
3376        if (parse_one_option(option))
3377                return;
3378
3379        die("This version of fast-import does not support option: %s", option);
3380}
3381
3382static void git_pack_config(void)
3383{
3384        int indexversion_value;
3385        int limit;
3386        unsigned long packsizelimit_value;
3387
3388        if (!git_config_get_ulong("pack.depth", &max_depth)) {
3389                if (max_depth > MAX_DEPTH)
3390                        max_depth = MAX_DEPTH;
3391        }
3392        if (!git_config_get_int("pack.indexversion", &indexversion_value)) {
3393                pack_idx_opts.version = indexversion_value;
3394                if (pack_idx_opts.version > 2)
3395                        git_die_config("pack.indexversion",
3396                                        "bad pack.indexversion=%"PRIu32, pack_idx_opts.version);
3397        }
3398        if (!git_config_get_ulong("pack.packsizelimit", &packsizelimit_value))
3399                max_packsize = packsizelimit_value;
3400
3401        if (!git_config_get_int("fastimport.unpacklimit", &limit))
3402                unpack_limit = limit;
3403        else if (!git_config_get_int("transfer.unpacklimit", &limit))
3404                unpack_limit = limit;
3405
3406        git_config(git_default_config, NULL);
3407}
3408
3409static const char fast_import_usage[] =
3410"git fast-import [--date-format=<f>] [--max-pack-size=<n>] [--big-file-threshold=<n>] [--depth=<n>] [--active-branches=<n>] [--export-marks=<marks.file>]";
3411
3412static void parse_argv(void)
3413{
3414        unsigned int i;
3415
3416        for (i = 1; i < global_argc; i++) {
3417                const char *a = global_argv[i];
3418
3419                if (*a != '-' || !strcmp(a, "--"))
3420                        break;
3421
3422                if (!skip_prefix(a, "--", &a))
3423                        die("unknown option %s", a);
3424
3425                if (parse_one_option(a))
3426                        continue;
3427
3428                if (parse_one_feature(a, 0))
3429                        continue;
3430
3431                if (skip_prefix(a, "cat-blob-fd=", &a)) {
3432                        option_cat_blob_fd(a);
3433                        continue;
3434                }
3435
3436                die("unknown option --%s", a);
3437        }
3438        if (i != global_argc)
3439                usage(fast_import_usage);
3440
3441        seen_data_command = 1;
3442        if (import_marks_file)
3443                read_marks();
3444}
3445
3446int cmd_main(int argc, const char **argv)
3447{
3448        unsigned int i;
3449
3450        if (argc == 2 && !strcmp(argv[1], "-h"))
3451                usage(fast_import_usage);
3452
3453        setup_git_directory();
3454        reset_pack_idx_option(&pack_idx_opts);
3455        git_pack_config();
3456
3457        alloc_objects(object_entry_alloc);
3458        strbuf_init(&command_buf, 0);
3459        atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
3460        branch_table = xcalloc(branch_table_sz, sizeof(struct branch*));
3461        avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*));
3462        marks = pool_calloc(1, sizeof(struct mark_set));
3463
3464        global_argc = argc;
3465        global_argv = argv;
3466
3467        rc_free = pool_alloc(cmd_save * sizeof(*rc_free));
3468        for (i = 0; i < (cmd_save - 1); i++)
3469                rc_free[i].next = &rc_free[i + 1];
3470        rc_free[cmd_save - 1].next = NULL;
3471
3472        prepare_packed_git();
3473        start_packfile();
3474        set_die_routine(die_nicely);
3475        set_checkpoint_signal();
3476        while (read_next_command() != EOF) {
3477                const char *v;
3478                if (!strcmp("blob", command_buf.buf))
3479                        parse_new_blob();
3480                else if (skip_prefix(command_buf.buf, "ls ", &v))
3481                        parse_ls(v, NULL);
3482                else if (skip_prefix(command_buf.buf, "commit ", &v))
3483                        parse_new_commit(v);
3484                else if (skip_prefix(command_buf.buf, "tag ", &v))
3485                        parse_new_tag(v);
3486                else if (skip_prefix(command_buf.buf, "reset ", &v))
3487                        parse_reset_branch(v);
3488                else if (!strcmp("checkpoint", command_buf.buf))
3489                        parse_checkpoint();
3490                else if (!strcmp("done", command_buf.buf))
3491                        break;
3492                else if (starts_with(command_buf.buf, "progress "))
3493                        parse_progress();
3494                else if (skip_prefix(command_buf.buf, "feature ", &v))
3495                        parse_feature(v);
3496                else if (skip_prefix(command_buf.buf, "option git ", &v))
3497                        parse_option(v);
3498                else if (starts_with(command_buf.buf, "option "))
3499                        /* ignore non-git options*/;
3500                else
3501                        die("Unsupported command: %s", command_buf.buf);
3502
3503                if (checkpoint_requested)
3504                        checkpoint();
3505        }
3506
3507        /* argv hasn't been parsed yet, do so */
3508        if (!seen_data_command)
3509                parse_argv();
3510
3511        if (require_explicit_termination && feof(stdin))
3512                die("stream ends early");
3513
3514        end_packfile();
3515
3516        dump_branches();
3517        dump_tags();
3518        unkeep_all_packs();
3519        dump_marks();
3520
3521        if (pack_edges)
3522                fclose(pack_edges);
3523
3524        if (show_stats) {
3525                uintmax_t total_count = 0, duplicate_count = 0;
3526                for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++)
3527                        total_count += object_count_by_type[i];
3528                for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++)
3529                        duplicate_count += duplicate_count_by_type[i];
3530
3531                fprintf(stderr, "%s statistics:\n", argv[0]);
3532                fprintf(stderr, "---------------------------------------------------------------------\n");
3533                fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
3534                fprintf(stderr, "Total objects:   %10" PRIuMAX " (%10" PRIuMAX " duplicates                  )\n", total_count, duplicate_count);
3535                fprintf(stderr, "      blobs  :   %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB], delta_count_attempts_by_type[OBJ_BLOB]);
3536                fprintf(stderr, "      trees  :   %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE], delta_count_attempts_by_type[OBJ_TREE]);
3537                fprintf(stderr, "      commits:   %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT], delta_count_by_type[OBJ_COMMIT], delta_count_attempts_by_type[OBJ_COMMIT]);
3538                fprintf(stderr, "      tags   :   %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG], delta_count_by_type[OBJ_TAG], delta_count_attempts_by_type[OBJ_TAG]);
3539                fprintf(stderr, "Total branches:  %10lu (%10lu loads     )\n", branch_count, branch_load_count);
3540                fprintf(stderr, "      marks:     %10" PRIuMAX " (%10" PRIuMAX " unique    )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
3541                fprintf(stderr, "      atoms:     %10u\n", atom_cnt);
3542                fprintf(stderr, "Memory total:    %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024);
3543                fprintf(stderr, "       pools:    %10lu KiB\n", (unsigned long)(total_allocd/1024));
3544                fprintf(stderr, "     objects:    %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
3545                fprintf(stderr, "---------------------------------------------------------------------\n");
3546                pack_report();
3547                fprintf(stderr, "---------------------------------------------------------------------\n");
3548                fprintf(stderr, "\n");
3549        }
3550
3551        return failure ? 1 : 0;
3552}