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