gitweb: Separate search regexp from search text
[git] / builtin-update-index.c
1 /*
2  * GIT - The information manager from hell
3  *
4  * Copyright (C) Linus Torvalds, 2005
5  */
6 #include "cache.h"
7 #include "strbuf.h"
8 #include "quote.h"
9 #include "cache-tree.h"
10 #include "tree-walk.h"
11 #include "builtin.h"
12 #include "refs.h"
13
14 /*
15  * Default to not allowing changes to the list of files. The
16  * tool doesn't actually care, but this makes it harder to add
17  * files to the revision control by mistake by doing something
18  * like "git-update-index *" and suddenly having all the object
19  * files be revision controlled.
20  */
21 static int allow_add;
22 static int allow_remove;
23 static int allow_replace;
24 static int info_only;
25 static int force_remove;
26 static int verbose;
27 static int mark_valid_only;
28 #define MARK_VALID 1
29 #define UNMARK_VALID 2
30
31 static void report(const char *fmt, ...)
32 {
33         va_list vp;
34
35         if (!verbose)
36                 return;
37
38         va_start(vp, fmt);
39         vprintf(fmt, vp);
40         putchar('\n');
41         va_end(vp);
42 }
43
44 static int mark_valid(const char *path)
45 {
46         int namelen = strlen(path);
47         int pos = cache_name_pos(path, namelen);
48         if (0 <= pos) {
49                 switch (mark_valid_only) {
50                 case MARK_VALID:
51                         active_cache[pos]->ce_flags |= htons(CE_VALID);
52                         break;
53                 case UNMARK_VALID:
54                         active_cache[pos]->ce_flags &= ~htons(CE_VALID);
55                         break;
56                 }
57                 cache_tree_invalidate_path(active_cache_tree, path);
58                 active_cache_changed = 1;
59                 return 0;
60         }
61         return -1;
62 }
63
64 static int remove_one_path(const char *path)
65 {
66         if (!allow_remove)
67                 return error("%s: does not exist and --remove not passed", path);
68         if (remove_file_from_cache(path))
69                 return error("%s: cannot remove from the index", path);
70         return 0;
71 }
72
73 /*
74  * Handle a path that couldn't be lstat'ed. It's either:
75  *  - missing file (ENOENT or ENOTDIR). That's ok if we're
76  *    supposed to be removing it and the removal actually
77  *    succeeds.
78  *  - permission error. That's never ok.
79  */
80 static int process_lstat_error(const char *path, int err)
81 {
82         if (err == ENOENT || err == ENOTDIR)
83                 return remove_one_path(path);
84         return error("lstat(\"%s\"): %s", path, strerror(errno));
85 }
86
87 static int add_one_path(struct cache_entry *old, const char *path, int len, struct stat *st)
88 {
89         int option, size = cache_entry_size(len);
90         struct cache_entry *ce = xcalloc(1, size);
91
92         memcpy(ce->name, path, len);
93         ce->ce_flags = htons(len);
94         fill_stat_cache_info(ce, st);
95         ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
96
97         if (index_path(ce->sha1, path, st, !info_only))
98                 return -1;
99         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
100         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
101         if (add_cache_entry(ce, option))
102                 return error("%s: cannot add to the index - missing --add option?", path);
103         return 0;
104 }
105
106 /*
107  * Handle a path that was a directory. Four cases:
108  *
109  *  - it's already a gitlink in the index, and we keep it that
110  *    way, and update it if we can (if we cannot find the HEAD,
111  *    we're going to keep it unchanged in the index!)
112  *
113  *  - it's a *file* in the index, in which case it should be
114  *    removed as a file if removal is allowed, since it doesn't
115  *    exist as such any more. If removal isn't allowed, it's
116  *    an error.
117  *
118  *    (NOTE! This is old and arguably fairly strange behaviour.
119  *    We might want to make this an error unconditionally, and
120  *    use "--force-remove" if you actually want to force removal).
121  *
122  *  - it used to exist as a subdirectory (ie multiple files with
123  *    this particular prefix) in the index, in which case it's wrong
124  *    to try to update it as a directory.
125  *
126  *  - it doesn't exist at all in the index, but it is a valid
127  *    git directory, and it should be *added* as a gitlink.
128  */
129 static int process_directory(const char *path, int len, struct stat *st)
130 {
131         unsigned char sha1[20];
132         int pos = cache_name_pos(path, len);
133
134         /* Exact match: file or existing gitlink */
135         if (pos >= 0) {
136                 struct cache_entry *ce = active_cache[pos];
137                 if (S_ISDIRLNK(ntohl(ce->ce_mode))) {
138
139                         /* Do nothing to the index if there is no HEAD! */
140                         if (resolve_gitlink_ref(path, "HEAD", sha1) < 0)
141                                 return 0;
142
143                         return add_one_path(ce, path, len, st);
144                 }
145                 /* Should this be an unconditional error? */
146                 return remove_one_path(path);
147         }
148
149         /* Inexact match: is there perhaps a subdirectory match? */
150         pos = -pos-1;
151         while (pos < active_nr) {
152                 struct cache_entry *ce = active_cache[pos++];
153
154                 if (strncmp(ce->name, path, len))
155                         break;
156                 if (ce->name[len] > '/')
157                         break;
158                 if (ce->name[len] < '/')
159                         continue;
160
161                 /* Subdirectory match - error out */
162                 return error("%s: is a directory - add individual files instead", path);
163         }
164
165         /* No match - should we add it as a gitlink? */
166         if (!resolve_gitlink_ref(path, "HEAD", sha1))
167                 return add_one_path(NULL, path, len, st);
168
169         /* Error out. */
170         return error("%s: is a directory - add files inside instead", path);
171 }
172
173 /*
174  * Process a regular file
175  */
176 static int process_file(const char *path, int len, struct stat *st)
177 {
178         int pos = cache_name_pos(path, len);
179         struct cache_entry *ce = pos < 0 ? NULL : active_cache[pos];
180
181         if (ce && S_ISDIRLNK(ntohl(ce->ce_mode)))
182                 return error("%s is already a gitlink, not replacing", path);
183
184         return add_one_path(ce, path, len, st);
185 }
186
187 static int process_path(const char *path)
188 {
189         int len;
190         struct stat st;
191
192         /* We probably want to do this in remove_file_from_cache() and
193          * add_cache_entry() instead...
194          */
195         cache_tree_invalidate_path(active_cache_tree, path);
196
197         /*
198          * First things first: get the stat information, to decide
199          * what to do about the pathname!
200          */
201         if (lstat(path, &st) < 0)
202                 return process_lstat_error(path, errno);
203
204         len = strlen(path);
205         if (S_ISDIR(st.st_mode))
206                 return process_directory(path, len, &st);
207
208         return process_file(path, len, &st);
209 }
210
211 static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
212                          const char *path, int stage)
213 {
214         int size, len, option;
215         struct cache_entry *ce;
216
217         if (!verify_path(path))
218                 return -1;
219
220         len = strlen(path);
221         size = cache_entry_size(len);
222         ce = xcalloc(1, size);
223
224         hashcpy(ce->sha1, sha1);
225         memcpy(ce->name, path, len);
226         ce->ce_flags = create_ce_flags(len, stage);
227         ce->ce_mode = create_ce_mode(mode);
228         if (assume_unchanged)
229                 ce->ce_flags |= htons(CE_VALID);
230         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
231         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
232         if (add_cache_entry(ce, option))
233                 return error("%s: cannot add to the index - missing --add option?",
234                              path);
235         report("add '%s'", path);
236         cache_tree_invalidate_path(active_cache_tree, path);
237         return 0;
238 }
239
240 static void chmod_path(int flip, const char *path)
241 {
242         int pos;
243         struct cache_entry *ce;
244         unsigned int mode;
245
246         pos = cache_name_pos(path, strlen(path));
247         if (pos < 0)
248                 goto fail;
249         ce = active_cache[pos];
250         mode = ntohl(ce->ce_mode);
251         if (!S_ISREG(mode))
252                 goto fail;
253         switch (flip) {
254         case '+':
255                 ce->ce_mode |= htonl(0111); break;
256         case '-':
257                 ce->ce_mode &= htonl(~0111); break;
258         default:
259                 goto fail;
260         }
261         cache_tree_invalidate_path(active_cache_tree, path);
262         active_cache_changed = 1;
263         report("chmod %cx '%s'", flip, path);
264         return;
265  fail:
266         die("git-update-index: cannot chmod %cx '%s'", flip, path);
267 }
268
269 static void update_one(const char *path, const char *prefix, int prefix_length)
270 {
271         const char *p = prefix_path(prefix, prefix_length, path);
272         if (!verify_path(p)) {
273                 fprintf(stderr, "Ignoring path %s\n", path);
274                 goto free_return;
275         }
276         if (mark_valid_only) {
277                 if (mark_valid(p))
278                         die("Unable to mark file %s", path);
279                 goto free_return;
280         }
281         cache_tree_invalidate_path(active_cache_tree, path);
282
283         if (force_remove) {
284                 if (remove_file_from_cache(p))
285                         die("git-update-index: unable to remove %s", path);
286                 report("remove '%s'", path);
287                 goto free_return;
288         }
289         if (process_path(p))
290                 die("Unable to process path %s", path);
291         report("add '%s'", path);
292  free_return:
293         if (p < path || p > path + strlen(path))
294                 free((char*)p);
295 }
296
297 static void read_index_info(int line_termination)
298 {
299         struct strbuf buf;
300         strbuf_init(&buf);
301         while (1) {
302                 char *ptr, *tab;
303                 char *path_name;
304                 unsigned char sha1[20];
305                 unsigned int mode;
306                 unsigned long ul;
307                 int stage;
308
309                 /* This reads lines formatted in one of three formats:
310                  *
311                  * (1) mode         SP sha1          TAB path
312                  * The first format is what "git-apply --index-info"
313                  * reports, and used to reconstruct a partial tree
314                  * that is used for phony merge base tree when falling
315                  * back on 3-way merge.
316                  *
317                  * (2) mode SP type SP sha1          TAB path
318                  * The second format is to stuff git-ls-tree output
319                  * into the index file.
320                  *
321                  * (3) mode         SP sha1 SP stage TAB path
322                  * This format is to put higher order stages into the
323                  * index file and matches git-ls-files --stage output.
324                  */
325                 read_line(&buf, stdin, line_termination);
326                 if (buf.eof)
327                         break;
328
329                 errno = 0;
330                 ul = strtoul(buf.buf, &ptr, 8);
331                 if (ptr == buf.buf || *ptr != ' '
332                     || errno || (unsigned int) ul != ul)
333                         goto bad_line;
334                 mode = ul;
335
336                 tab = strchr(ptr, '\t');
337                 if (!tab || tab - ptr < 41)
338                         goto bad_line;
339
340                 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
341                         stage = tab[-1] - '0';
342                         ptr = tab + 1; /* point at the head of path */
343                         tab = tab - 2; /* point at tail of sha1 */
344                 }
345                 else {
346                         stage = 0;
347                         ptr = tab + 1; /* point at the head of path */
348                 }
349
350                 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
351                         goto bad_line;
352
353                 if (line_termination && ptr[0] == '"')
354                         path_name = unquote_c_style(ptr, NULL);
355                 else
356                         path_name = ptr;
357
358                 if (!verify_path(path_name)) {
359                         fprintf(stderr, "Ignoring path %s\n", path_name);
360                         if (path_name != ptr)
361                                 free(path_name);
362                         continue;
363                 }
364                 cache_tree_invalidate_path(active_cache_tree, path_name);
365
366                 if (!mode) {
367                         /* mode == 0 means there is no such path -- remove */
368                         if (remove_file_from_cache(path_name))
369                                 die("git-update-index: unable to remove %s",
370                                     ptr);
371                 }
372                 else {
373                         /* mode ' ' sha1 '\t' name
374                          * ptr[-1] points at tab,
375                          * ptr[-41] is at the beginning of sha1
376                          */
377                         ptr[-42] = ptr[-1] = 0;
378                         if (add_cacheinfo(mode, sha1, path_name, stage))
379                                 die("git-update-index: unable to update %s",
380                                     path_name);
381                 }
382                 if (path_name != ptr)
383                         free(path_name);
384                 continue;
385
386         bad_line:
387                 die("malformed index info %s", buf.buf);
388         }
389 }
390
391 static const char update_index_usage[] =
392 "git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again | -g] [--ignore-missing] [-z] [--verbose] [--] <file>...";
393
394 static unsigned char head_sha1[20];
395 static unsigned char merge_head_sha1[20];
396
397 static struct cache_entry *read_one_ent(const char *which,
398                                         unsigned char *ent, const char *path,
399                                         int namelen, int stage)
400 {
401         unsigned mode;
402         unsigned char sha1[20];
403         int size;
404         struct cache_entry *ce;
405
406         if (get_tree_entry(ent, path, sha1, &mode)) {
407                 if (which)
408                         error("%s: not in %s branch.", path, which);
409                 return NULL;
410         }
411         if (mode == S_IFDIR) {
412                 if (which)
413                         error("%s: not a blob in %s branch.", path, which);
414                 return NULL;
415         }
416         size = cache_entry_size(namelen);
417         ce = xcalloc(1, size);
418
419         hashcpy(ce->sha1, sha1);
420         memcpy(ce->name, path, namelen);
421         ce->ce_flags = create_ce_flags(namelen, stage);
422         ce->ce_mode = create_ce_mode(mode);
423         return ce;
424 }
425
426 static int unresolve_one(const char *path)
427 {
428         int namelen = strlen(path);
429         int pos;
430         int ret = 0;
431         struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
432
433         /* See if there is such entry in the index. */
434         pos = cache_name_pos(path, namelen);
435         if (pos < 0) {
436                 /* If there isn't, either it is unmerged, or
437                  * resolved as "removed" by mistake.  We do not
438                  * want to do anything in the former case.
439                  */
440                 pos = -pos-1;
441                 if (pos < active_nr) {
442                         struct cache_entry *ce = active_cache[pos];
443                         if (ce_namelen(ce) == namelen &&
444                             !memcmp(ce->name, path, namelen)) {
445                                 fprintf(stderr,
446                                         "%s: skipping still unmerged path.\n",
447                                         path);
448                                 goto free_return;
449                         }
450                 }
451         }
452
453         /* Grab blobs from given path from HEAD and MERGE_HEAD,
454          * stuff HEAD version in stage #2,
455          * stuff MERGE_HEAD version in stage #3.
456          */
457         ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
458         ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
459
460         if (!ce_2 || !ce_3) {
461                 ret = -1;
462                 goto free_return;
463         }
464         if (!hashcmp(ce_2->sha1, ce_3->sha1) &&
465             ce_2->ce_mode == ce_3->ce_mode) {
466                 fprintf(stderr, "%s: identical in both, skipping.\n",
467                         path);
468                 goto free_return;
469         }
470
471         cache_tree_invalidate_path(active_cache_tree, path);
472         remove_file_from_cache(path);
473         if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
474                 error("%s: cannot add our version to the index.", path);
475                 ret = -1;
476                 goto free_return;
477         }
478         if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
479                 return 0;
480         error("%s: cannot add their version to the index.", path);
481         ret = -1;
482  free_return:
483         free(ce_2);
484         free(ce_3);
485         return ret;
486 }
487
488 static void read_head_pointers(void)
489 {
490         if (read_ref("HEAD", head_sha1))
491                 die("No HEAD -- no initial commit yet?\n");
492         if (read_ref("MERGE_HEAD", merge_head_sha1)) {
493                 fprintf(stderr, "Not in the middle of a merge.\n");
494                 exit(0);
495         }
496 }
497
498 static int do_unresolve(int ac, const char **av,
499                         const char *prefix, int prefix_length)
500 {
501         int i;
502         int err = 0;
503
504         /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
505          * are not doing a merge, so exit with success status.
506          */
507         read_head_pointers();
508
509         for (i = 1; i < ac; i++) {
510                 const char *arg = av[i];
511                 const char *p = prefix_path(prefix, prefix_length, arg);
512                 err |= unresolve_one(p);
513                 if (p < arg || p > arg + strlen(arg))
514                         free((char*)p);
515         }
516         return err;
517 }
518
519 static int do_reupdate(int ac, const char **av,
520                        const char *prefix, int prefix_length)
521 {
522         /* Read HEAD and run update-index on paths that are
523          * merged and already different between index and HEAD.
524          */
525         int pos;
526         int has_head = 1;
527         const char **pathspec = get_pathspec(prefix, av + 1);
528
529         if (read_ref("HEAD", head_sha1))
530                 /* If there is no HEAD, that means it is an initial
531                  * commit.  Update everything in the index.
532                  */
533                 has_head = 0;
534  redo:
535         for (pos = 0; pos < active_nr; pos++) {
536                 struct cache_entry *ce = active_cache[pos];
537                 struct cache_entry *old = NULL;
538                 int save_nr;
539
540                 if (ce_stage(ce) || !ce_path_match(ce, pathspec))
541                         continue;
542                 if (has_head)
543                         old = read_one_ent(NULL, head_sha1,
544                                            ce->name, ce_namelen(ce), 0);
545                 if (old && ce->ce_mode == old->ce_mode &&
546                     !hashcmp(ce->sha1, old->sha1)) {
547                         free(old);
548                         continue; /* unchanged */
549                 }
550                 /* Be careful.  The working tree may not have the
551                  * path anymore, in which case, under 'allow_remove',
552                  * or worse yet 'allow_replace', active_nr may decrease.
553                  */
554                 save_nr = active_nr;
555                 update_one(ce->name + prefix_length, prefix, prefix_length);
556                 if (save_nr != active_nr)
557                         goto redo;
558         }
559         return 0;
560 }
561
562 int cmd_update_index(int argc, const char **argv, const char *prefix)
563 {
564         int i, newfd, entries, has_errors = 0, line_termination = '\n';
565         int allow_options = 1;
566         int read_from_stdin = 0;
567         int prefix_length = prefix ? strlen(prefix) : 0;
568         char set_executable_bit = 0;
569         unsigned int refresh_flags = 0;
570         int lock_error = 0;
571         struct lock_file *lock_file;
572
573         git_config(git_default_config);
574
575         /* We can't free this memory, it becomes part of a linked list parsed atexit() */
576         lock_file = xcalloc(1, sizeof(struct lock_file));
577
578         newfd = hold_locked_index(lock_file, 0);
579         if (newfd < 0)
580                 lock_error = errno;
581
582         entries = read_cache();
583         if (entries < 0)
584                 die("cache corrupted");
585
586         for (i = 1 ; i < argc; i++) {
587                 const char *path = argv[i];
588                 const char *p;
589
590                 if (allow_options && *path == '-') {
591                         if (!strcmp(path, "--")) {
592                                 allow_options = 0;
593                                 continue;
594                         }
595                         if (!strcmp(path, "-q")) {
596                                 refresh_flags |= REFRESH_QUIET;
597                                 continue;
598                         }
599                         if (!strcmp(path, "--add")) {
600                                 allow_add = 1;
601                                 continue;
602                         }
603                         if (!strcmp(path, "--replace")) {
604                                 allow_replace = 1;
605                                 continue;
606                         }
607                         if (!strcmp(path, "--remove")) {
608                                 allow_remove = 1;
609                                 continue;
610                         }
611                         if (!strcmp(path, "--unmerged")) {
612                                 refresh_flags |= REFRESH_UNMERGED;
613                                 continue;
614                         }
615                         if (!strcmp(path, "--refresh")) {
616                                 has_errors |= refresh_cache(refresh_flags);
617                                 continue;
618                         }
619                         if (!strcmp(path, "--really-refresh")) {
620                                 has_errors |= refresh_cache(REFRESH_REALLY | refresh_flags);
621                                 continue;
622                         }
623                         if (!strcmp(path, "--cacheinfo")) {
624                                 unsigned char sha1[20];
625                                 unsigned int mode;
626
627                                 if (i+3 >= argc)
628                                         die("git-update-index: --cacheinfo <mode> <sha1> <path>");
629
630                                 if (strtoul_ui(argv[i+1], 8, &mode) ||
631                                     get_sha1_hex(argv[i+2], sha1) ||
632                                     add_cacheinfo(mode, sha1, argv[i+3], 0))
633                                         die("git-update-index: --cacheinfo"
634                                             " cannot add %s", argv[i+3]);
635                                 i += 3;
636                                 continue;
637                         }
638                         if (!strcmp(path, "--chmod=-x") ||
639                             !strcmp(path, "--chmod=+x")) {
640                                 if (argc <= i+1)
641                                         die("git-update-index: %s <path>", path);
642                                 set_executable_bit = path[8];
643                                 continue;
644                         }
645                         if (!strcmp(path, "--assume-unchanged")) {
646                                 mark_valid_only = MARK_VALID;
647                                 continue;
648                         }
649                         if (!strcmp(path, "--no-assume-unchanged")) {
650                                 mark_valid_only = UNMARK_VALID;
651                                 continue;
652                         }
653                         if (!strcmp(path, "--info-only")) {
654                                 info_only = 1;
655                                 continue;
656                         }
657                         if (!strcmp(path, "--force-remove")) {
658                                 force_remove = 1;
659                                 continue;
660                         }
661                         if (!strcmp(path, "-z")) {
662                                 line_termination = 0;
663                                 continue;
664                         }
665                         if (!strcmp(path, "--stdin")) {
666                                 if (i != argc - 1)
667                                         die("--stdin must be at the end");
668                                 read_from_stdin = 1;
669                                 break;
670                         }
671                         if (!strcmp(path, "--index-info")) {
672                                 if (i != argc - 1)
673                                         die("--index-info must be at the end");
674                                 allow_add = allow_replace = allow_remove = 1;
675                                 read_index_info(line_termination);
676                                 break;
677                         }
678                         if (!strcmp(path, "--unresolve")) {
679                                 has_errors = do_unresolve(argc - i, argv + i,
680                                                           prefix, prefix_length);
681                                 if (has_errors)
682                                         active_cache_changed = 0;
683                                 goto finish;
684                         }
685                         if (!strcmp(path, "--again") || !strcmp(path, "-g")) {
686                                 has_errors = do_reupdate(argc - i, argv + i,
687                                                          prefix, prefix_length);
688                                 if (has_errors)
689                                         active_cache_changed = 0;
690                                 goto finish;
691                         }
692                         if (!strcmp(path, "--ignore-missing")) {
693                                 refresh_flags |= REFRESH_IGNORE_MISSING;
694                                 continue;
695                         }
696                         if (!strcmp(path, "--verbose")) {
697                                 verbose = 1;
698                                 continue;
699                         }
700                         if (!strcmp(path, "-h") || !strcmp(path, "--help"))
701                                 usage(update_index_usage);
702                         die("unknown option %s", path);
703                 }
704                 p = prefix_path(prefix, prefix_length, path);
705                 update_one(p, NULL, 0);
706                 if (set_executable_bit)
707                         chmod_path(set_executable_bit, p);
708                 if (p < path || p > path + strlen(path))
709                         free((char*)p);
710         }
711         if (read_from_stdin) {
712                 struct strbuf buf;
713                 strbuf_init(&buf);
714                 while (1) {
715                         char *path_name;
716                         const char *p;
717                         read_line(&buf, stdin, line_termination);
718                         if (buf.eof)
719                                 break;
720                         if (line_termination && buf.buf[0] == '"')
721                                 path_name = unquote_c_style(buf.buf, NULL);
722                         else
723                                 path_name = buf.buf;
724                         p = prefix_path(prefix, prefix_length, path_name);
725                         update_one(p, NULL, 0);
726                         if (set_executable_bit)
727                                 chmod_path(set_executable_bit, p);
728                         if (p < path_name || p > path_name + strlen(path_name))
729                                 free((char*) p);
730                         if (path_name != buf.buf)
731                                 free(path_name);
732                 }
733         }
734
735  finish:
736         if (active_cache_changed) {
737                 if (newfd < 0) {
738                         if (refresh_flags & REFRESH_QUIET)
739                                 exit(128);
740                         die("unable to create '%s.lock': %s",
741                             get_index_file(), strerror(lock_error));
742                 }
743                 if (write_cache(newfd, active_cache, active_nr) ||
744                     close(newfd) || commit_locked_index(lock_file))
745                         die("Unable to write new index file");
746         }
747
748         rollback_lock_file(lock_file);
749
750         return has_errors ? 1 : 0;
751 }