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refs file backend: move raceproof_create_file() here
[git/debian.git] / submodule.c
blob8e611fe1dbf1f7616040f8359ee5d9b9892ad191
1
2 #include "cache.h"
3 #include "repository.h"
4 #include "config.h"
5 #include "submodule-config.h"
6 #include "submodule.h"
7 #include "dir.h"
8 #include "diff.h"
9 #include "commit.h"
10 #include "revision.h"
11 #include "run-command.h"
12 #include "diffcore.h"
13 #include "refs.h"
14 #include "string-list.h"
15 #include "oid-array.h"
16 #include "strvec.h"
17 #include "blob.h"
18 #include "thread-utils.h"
19 #include "quote.h"
20 #include "remote.h"
21 #include "worktree.h"
22 #include "parse-options.h"
23 #include "object-store.h"
24 #include "commit-reach.h"
25
26 static int config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
27 static int initialized_fetch_ref_tips;
28 static struct oid_array ref_tips_before_fetch;
29 static struct oid_array ref_tips_after_fetch;
30
31 /*
32 * Check if the .gitmodules file is unmerged. Parsing of the .gitmodules file
33 * will be disabled because we can't guess what might be configured in
34 * .gitmodules unless the user resolves the conflict.
35 */
36 int is_gitmodules_unmerged(struct index_state *istate)
37 {
38 int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE));
39 if (pos < 0) { /* .gitmodules not found or isn't merged */
40 pos = -1 - pos;
41 if (istate->cache_nr > pos) { /* there is a .gitmodules */
42 const struct cache_entry *ce = istate->cache[pos];
43 if (ce_namelen(ce) == strlen(GITMODULES_FILE) &&
44 !strcmp(ce->name, GITMODULES_FILE))
45 return 1;
46 }
47 }
48
49 return 0;
50 }
51
52 /*
53 * Check if the .gitmodules file is safe to write.
54 *
55 * Writing to the .gitmodules file requires that the file exists in the
56 * working tree or, if it doesn't, that a brand new .gitmodules file is going
57 * to be created (i.e. it's neither in the index nor in the current branch).
58 *
59 * It is not safe to write to .gitmodules if it's not in the working tree but
60 * it is in the index or in the current branch, because writing new values
61 * (and staging them) would blindly overwrite ALL the old content.
62 */
63 int is_writing_gitmodules_ok(void)
64 {
65 struct object_id oid;
66 return file_exists(GITMODULES_FILE) ||
67 (get_oid(GITMODULES_INDEX, &oid) < 0 && get_oid(GITMODULES_HEAD, &oid) < 0);
68 }
69
70 /*
71 * Check if the .gitmodules file has unstaged modifications. This must be
72 * checked before allowing modifications to the .gitmodules file with the
73 * intention to stage them later, because when continuing we would stage the
74 * modifications the user didn't stage herself too. That might change in a
75 * future version when we learn to stage the changes we do ourselves without
76 * staging any previous modifications.
77 */
78 int is_staging_gitmodules_ok(struct index_state *istate)
79 {
80 int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE));
81
82 if ((pos >= 0) && (pos < istate->cache_nr)) {
83 struct stat st;
84 if (lstat(GITMODULES_FILE, &st) == 0 &&
85 ie_modified(istate, istate->cache[pos], &st, 0) & DATA_CHANGED)
86 return 0;
87 }
88
89 return 1;
90 }
91
92 static int for_each_remote_ref_submodule(const char *submodule,
93 each_ref_fn fn, void *cb_data)
94 {
95 return refs_for_each_remote_ref(get_submodule_ref_store(submodule),
96 fn, cb_data);
97 }
98
99 /*
100 * Try to update the "path" entry in the "submodule.<name>" section of the
101 * .gitmodules file. Return 0 only if a .gitmodules file was found, a section
102 * with the correct path=<oldpath> setting was found and we could update it.
103 */
104 int update_path_in_gitmodules(const char *oldpath, const char *newpath)
105 {
106 struct strbuf entry = STRBUF_INIT;
107 const struct submodule *submodule;
108 int ret;
109
110 if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
111 return -1;
112
113 if (is_gitmodules_unmerged(the_repository->index))
114 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
115
116 submodule = submodule_from_path(the_repository, null_oid(), oldpath);
117 if (!submodule || !submodule->name) {
118 warning(_("Could not find section in .gitmodules where path=%s"), oldpath);
119 return -1;
120 }
121 strbuf_addstr(&entry, "submodule.");
122 strbuf_addstr(&entry, submodule->name);
123 strbuf_addstr(&entry, ".path");
124 ret = config_set_in_gitmodules_file_gently(entry.buf, newpath);
125 strbuf_release(&entry);
126 return ret;
127 }
128
129 /*
130 * Try to remove the "submodule.<name>" section from .gitmodules where the given
131 * path is configured. Return 0 only if a .gitmodules file was found, a section
132 * with the correct path=<path> setting was found and we could remove it.
133 */
134 int remove_path_from_gitmodules(const char *path)
135 {
136 struct strbuf sect = STRBUF_INIT;
137 const struct submodule *submodule;
138
139 if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
140 return -1;
141
142 if (is_gitmodules_unmerged(the_repository->index))
143 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
144
145 submodule = submodule_from_path(the_repository, null_oid(), path);
146 if (!submodule || !submodule->name) {
147 warning(_("Could not find section in .gitmodules where path=%s"), path);
148 return -1;
149 }
150 strbuf_addstr(&sect, "submodule.");
151 strbuf_addstr(&sect, submodule->name);
152 if (git_config_rename_section_in_file(GITMODULES_FILE, sect.buf, NULL) < 0) {
153 /* Maybe the user already did that, don't error out here */
154 warning(_("Could not remove .gitmodules entry for %s"), path);
155 strbuf_release(&sect);
156 return -1;
157 }
158 strbuf_release(&sect);
159 return 0;
160 }
161
162 void stage_updated_gitmodules(struct index_state *istate)
163 {
164 if (add_file_to_index(istate, GITMODULES_FILE, 0))
165 die(_("staging updated .gitmodules failed"));
166 }
167
168 /* TODO: remove this function, use repo_submodule_init instead. */
169 int add_submodule_odb(const char *path)
170 {
171 struct strbuf objects_directory = STRBUF_INIT;
172 int ret = 0;
173
174 ret = strbuf_git_path_submodule(&objects_directory, path, "objects/");
175 if (ret)
176 goto done;
177 if (!is_directory(objects_directory.buf)) {
178 ret = -1;
179 goto done;
180 }
181 add_to_alternates_memory(objects_directory.buf);
182 done:
183 strbuf_release(&objects_directory);
184 return ret;
185 }
186
187 void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
188 const char *path)
189 {
190 const struct submodule *submodule = submodule_from_path(the_repository,
191 null_oid(),
192 path);
193 if (submodule) {
194 const char *ignore;
195 char *key;
196
197 key = xstrfmt("submodule.%s.ignore", submodule->name);
198 if (repo_config_get_string_tmp(the_repository, key, &ignore))
199 ignore = submodule->ignore;
200 free(key);
201
202 if (ignore)
203 handle_ignore_submodules_arg(diffopt, ignore);
204 else if (is_gitmodules_unmerged(the_repository->index))
205 diffopt->flags.ignore_submodules = 1;
206 }
207 }
208
209 /* Cheap function that only determines if we're interested in submodules at all */
210 int git_default_submodule_config(const char *var, const char *value, void *cb)
211 {
212 if (!strcmp(var, "submodule.recurse")) {
213 int v = git_config_bool(var, value) ?
214 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
215 config_update_recurse_submodules = v;
216 }
217 return 0;
218 }
219
220 int option_parse_recurse_submodules_worktree_updater(const struct option *opt,
221 const char *arg, int unset)
222 {
223 if (unset) {
224 config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
225 return 0;
226 }
227 if (arg)
228 config_update_recurse_submodules =
229 parse_update_recurse_submodules_arg(opt->long_name,
230 arg);
231 else
232 config_update_recurse_submodules = RECURSE_SUBMODULES_ON;
233
234 return 0;
235 }
236
237 /*
238 * Determine if a submodule has been initialized at a given 'path'
239 */
240 int is_submodule_active(struct repository *repo, const char *path)
241 {
242 int ret = 0;
243 char *key = NULL;
244 char *value = NULL;
245 const struct string_list *sl;
246 const struct submodule *module;
247
248 module = submodule_from_path(repo, null_oid(), path);
249
250 /* early return if there isn't a path->module mapping */
251 if (!module)
252 return 0;
253
254 /* submodule.<name>.active is set */
255 key = xstrfmt("submodule.%s.active", module->name);
256 if (!repo_config_get_bool(repo, key, &ret)) {
257 free(key);
258 return ret;
259 }
260 free(key);
261
262 /* submodule.active is set */
263 sl = repo_config_get_value_multi(repo, "submodule.active");
264 if (sl) {
265 struct pathspec ps;
266 struct strvec args = STRVEC_INIT;
267 const struct string_list_item *item;
268
269 for_each_string_list_item(item, sl) {
270 strvec_push(&args, item->string);
271 }
272
273 parse_pathspec(&ps, 0, 0, NULL, args.v);
274 ret = match_pathspec(repo->index, &ps, path, strlen(path), 0, NULL, 1);
275
276 strvec_clear(&args);
277 clear_pathspec(&ps);
278 return ret;
279 }
280
281 /* fallback to checking if the URL is set */
282 key = xstrfmt("submodule.%s.url", module->name);
283 ret = !repo_config_get_string(repo, key, &value);
284
285 free(value);
286 free(key);
287 return ret;
288 }
289
290 int is_submodule_populated_gently(const char *path, int *return_error_code)
291 {
292 int ret = 0;
293 char *gitdir = xstrfmt("%s/.git", path);
294
295 if (resolve_gitdir_gently(gitdir, return_error_code))
296 ret = 1;
297
298 free(gitdir);
299 return ret;
300 }
301
302 /*
303 * Dies if the provided 'prefix' corresponds to an unpopulated submodule
304 */
305 void die_in_unpopulated_submodule(struct index_state *istate,
306 const char *prefix)
307 {
308 int i, prefixlen;
309
310 if (!prefix)
311 return;
312
313 prefixlen = strlen(prefix);
314
315 for (i = 0; i < istate->cache_nr; i++) {
316 struct cache_entry *ce = istate->cache[i];
317 int ce_len = ce_namelen(ce);
318
319 if (!S_ISGITLINK(ce->ce_mode))
320 continue;
321 if (prefixlen <= ce_len)
322 continue;
323 if (strncmp(ce->name, prefix, ce_len))
324 continue;
325 if (prefix[ce_len] != '/')
326 continue;
327
328 die(_("in unpopulated submodule '%s'"), ce->name);
329 }
330 }
331
332 /*
333 * Dies if any paths in the provided pathspec descends into a submodule
334 */
335 void die_path_inside_submodule(struct index_state *istate,
336 const struct pathspec *ps)
337 {
338 int i, j;
339
340 for (i = 0; i < istate->cache_nr; i++) {
341 struct cache_entry *ce = istate->cache[i];
342 int ce_len = ce_namelen(ce);
343
344 if (!S_ISGITLINK(ce->ce_mode))
345 continue;
346
347 for (j = 0; j < ps->nr ; j++) {
348 const struct pathspec_item *item = &ps->items[j];
349
350 if (item->len <= ce_len)
351 continue;
352 if (item->match[ce_len] != '/')
353 continue;
354 if (strncmp(ce->name, item->match, ce_len))
355 continue;
356 if (item->len == ce_len + 1)
357 continue;
358
359 die(_("Pathspec '%s' is in submodule '%.*s'"),
360 item->original, ce_len, ce->name);
361 }
362 }
363 }
364
365 enum submodule_update_type parse_submodule_update_type(const char *value)
366 {
367 if (!strcmp(value, "none"))
368 return SM_UPDATE_NONE;
369 else if (!strcmp(value, "checkout"))
370 return SM_UPDATE_CHECKOUT;
371 else if (!strcmp(value, "rebase"))
372 return SM_UPDATE_REBASE;
373 else if (!strcmp(value, "merge"))
374 return SM_UPDATE_MERGE;
375 else if (*value == '!')
376 return SM_UPDATE_COMMAND;
377 else
378 return SM_UPDATE_UNSPECIFIED;
379 }
380
381 int parse_submodule_update_strategy(const char *value,
382 struct submodule_update_strategy *dst)
383 {
384 enum submodule_update_type type;
385
386 free((void*)dst->command);
387 dst->command = NULL;
388
389 type = parse_submodule_update_type(value);
390 if (type == SM_UPDATE_UNSPECIFIED)
391 return -1;
392
393 dst->type = type;
394 if (type == SM_UPDATE_COMMAND)
395 dst->command = xstrdup(value + 1);
396
397 return 0;
398 }
399
400 const char *submodule_strategy_to_string(const struct submodule_update_strategy *s)
401 {
402 struct strbuf sb = STRBUF_INIT;
403 switch (s->type) {
404 case SM_UPDATE_CHECKOUT:
405 return "checkout";
406 case SM_UPDATE_MERGE:
407 return "merge";
408 case SM_UPDATE_REBASE:
409 return "rebase";
410 case SM_UPDATE_NONE:
411 return "none";
412 case SM_UPDATE_UNSPECIFIED:
413 return NULL;
414 case SM_UPDATE_COMMAND:
415 strbuf_addf(&sb, "!%s", s->command);
416 return strbuf_detach(&sb, NULL);
417 }
418 return NULL;
419 }
420
421 void handle_ignore_submodules_arg(struct diff_options *diffopt,
422 const char *arg)
423 {
424 diffopt->flags.ignore_submodule_set = 1;
425 diffopt->flags.ignore_submodules = 0;
426 diffopt->flags.ignore_untracked_in_submodules = 0;
427 diffopt->flags.ignore_dirty_submodules = 0;
428
429 if (!strcmp(arg, "all"))
430 diffopt->flags.ignore_submodules = 1;
431 else if (!strcmp(arg, "untracked"))
432 diffopt->flags.ignore_untracked_in_submodules = 1;
433 else if (!strcmp(arg, "dirty"))
434 diffopt->flags.ignore_dirty_submodules = 1;
435 else if (strcmp(arg, "none"))
436 die(_("bad --ignore-submodules argument: %s"), arg);
437 /*
438 * Please update _git_status() in git-completion.bash when you
439 * add new options
440 */
441 }
442
443 static int prepare_submodule_diff_summary(struct repository *r, struct rev_info *rev,
444 const char *path,
445 struct commit *left, struct commit *right,
446 struct commit_list *merge_bases)
447 {
448 struct commit_list *list;
449
450 repo_init_revisions(r, rev, NULL);
451 setup_revisions(0, NULL, rev, NULL);
452 rev->left_right = 1;
453 rev->first_parent_only = 1;
454 left->object.flags |= SYMMETRIC_LEFT;
455 add_pending_object(rev, &left->object, path);
456 add_pending_object(rev, &right->object, path);
457 for (list = merge_bases; list; list = list->next) {
458 list->item->object.flags |= UNINTERESTING;
459 add_pending_object(rev, &list->item->object,
460 oid_to_hex(&list->item->object.oid));
461 }
462 return prepare_revision_walk(rev);
463 }
464
465 static void print_submodule_diff_summary(struct repository *r, struct rev_info *rev, struct diff_options *o)
466 {
467 static const char format[] = " %m %s";
468 struct strbuf sb = STRBUF_INIT;
469 struct commit *commit;
470
471 while ((commit = get_revision(rev))) {
472 struct pretty_print_context ctx = {0};
473 ctx.date_mode = rev->date_mode;
474 ctx.output_encoding = get_log_output_encoding();
475 strbuf_setlen(&sb, 0);
476 repo_format_commit_message(r, commit, format, &sb,
477 &ctx);
478 strbuf_addch(&sb, '\n');
479 if (commit->object.flags & SYMMETRIC_LEFT)
480 diff_emit_submodule_del(o, sb.buf);
481 else
482 diff_emit_submodule_add(o, sb.buf);
483 }
484 strbuf_release(&sb);
485 }
486
487 void prepare_submodule_repo_env(struct strvec *out)
488 {
489 prepare_other_repo_env(out, DEFAULT_GIT_DIR_ENVIRONMENT);
490 }
491
492 static void prepare_submodule_repo_env_in_gitdir(struct strvec *out)
493 {
494 prepare_other_repo_env(out, ".");
495 }
496
497 /*
498 * Initialize a repository struct for a submodule based on the provided 'path'.
499 *
500 * Unlike repo_submodule_init, this tolerates submodules not present
501 * in .gitmodules. This function exists only to preserve historical behavior,
502 *
503 * Returns the repository struct on success,
504 * NULL when the submodule is not present.
505 */
506 static struct repository *open_submodule(const char *path)
507 {
508 struct strbuf sb = STRBUF_INIT;
509 struct repository *out = xmalloc(sizeof(*out));
510
511 if (submodule_to_gitdir(&sb, path) || repo_init(out, sb.buf, NULL)) {
512 strbuf_release(&sb);
513 free(out);
514 return NULL;
515 }
516
517 /* Mark it as a submodule */
518 out->submodule_prefix = xstrdup(path);
519
520 strbuf_release(&sb);
521 return out;
522 }
523
524 /*
525 * Helper function to display the submodule header line prior to the full
526 * summary output.
527 *
528 * If it can locate the submodule git directory it will create a repository
529 * handle for the submodule and lookup both the left and right commits and
530 * put them into the left and right pointers.
531 */
532 static void show_submodule_header(struct diff_options *o,
533 const char *path,
534 struct object_id *one, struct object_id *two,
535 unsigned dirty_submodule,
536 struct repository *sub,
537 struct commit **left, struct commit **right,
538 struct commit_list **merge_bases)
539 {
540 const char *message = NULL;
541 struct strbuf sb = STRBUF_INIT;
542 int fast_forward = 0, fast_backward = 0;
543
544 if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
545 diff_emit_submodule_untracked(o, path);
546
547 if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
548 diff_emit_submodule_modified(o, path);
549
550 if (is_null_oid(one))
551 message = "(new submodule)";
552 else if (is_null_oid(two))
553 message = "(submodule deleted)";
554
555 if (!sub) {
556 if (!message)
557 message = "(commits not present)";
558 goto output_header;
559 }
560
561 /*
562 * Attempt to lookup the commit references, and determine if this is
563 * a fast forward or fast backwards update.
564 */
565 *left = lookup_commit_reference(sub, one);
566 *right = lookup_commit_reference(sub, two);
567
568 /*
569 * Warn about missing commits in the submodule project, but only if
570 * they aren't null.
571 */
572 if ((!is_null_oid(one) && !*left) ||
573 (!is_null_oid(two) && !*right))
574 message = "(commits not present)";
575
576 *merge_bases = repo_get_merge_bases(sub, *left, *right);
577 if (*merge_bases) {
578 if ((*merge_bases)->item == *left)
579 fast_forward = 1;
580 else if ((*merge_bases)->item == *right)
581 fast_backward = 1;
582 }
583
584 if (oideq(one, two)) {
585 strbuf_release(&sb);
586 return;
587 }
588
589 output_header:
590 strbuf_addf(&sb, "Submodule %s ", path);
591 strbuf_add_unique_abbrev(&sb, one, DEFAULT_ABBREV);
592 strbuf_addstr(&sb, (fast_backward || fast_forward) ? ".." : "...");
593 strbuf_add_unique_abbrev(&sb, two, DEFAULT_ABBREV);
594 if (message)
595 strbuf_addf(&sb, " %s\n", message);
596 else
597 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
598 diff_emit_submodule_header(o, sb.buf);
599
600 strbuf_release(&sb);
601 }
602
603 void show_submodule_diff_summary(struct diff_options *o, const char *path,
604 struct object_id *one, struct object_id *two,
605 unsigned dirty_submodule)
606 {
607 struct rev_info rev;
608 struct commit *left = NULL, *right = NULL;
609 struct commit_list *merge_bases = NULL;
610 struct repository *sub;
611
612 sub = open_submodule(path);
613 show_submodule_header(o, path, one, two, dirty_submodule,
614 sub, &left, &right, &merge_bases);
615
616 /*
617 * If we don't have both a left and a right pointer, there is no
618 * reason to try and display a summary. The header line should contain
619 * all the information the user needs.
620 */
621 if (!left || !right || !sub)
622 goto out;
623
624 /* Treat revision walker failure the same as missing commits */
625 if (prepare_submodule_diff_summary(sub, &rev, path, left, right, merge_bases)) {
626 diff_emit_submodule_error(o, "(revision walker failed)\n");
627 goto out;
628 }
629
630 print_submodule_diff_summary(sub, &rev, o);
631
632 out:
633 if (merge_bases)
634 free_commit_list(merge_bases);
635 clear_commit_marks(left, ~0);
636 clear_commit_marks(right, ~0);
637 if (sub) {
638 repo_clear(sub);
639 free(sub);
640 }
641 }
642
643 void show_submodule_inline_diff(struct diff_options *o, const char *path,
644 struct object_id *one, struct object_id *two,
645 unsigned dirty_submodule)
646 {
647 const struct object_id *old_oid = the_hash_algo->empty_tree, *new_oid = the_hash_algo->empty_tree;
648 struct commit *left = NULL, *right = NULL;
649 struct commit_list *merge_bases = NULL;
650 struct child_process cp = CHILD_PROCESS_INIT;
651 struct strbuf sb = STRBUF_INIT;
652 struct repository *sub;
653
654 sub = open_submodule(path);
655 show_submodule_header(o, path, one, two, dirty_submodule,
656 sub, &left, &right, &merge_bases);
657
658 /* We need a valid left and right commit to display a difference */
659 if (!(left || is_null_oid(one)) ||
660 !(right || is_null_oid(two)))
661 goto done;
662
663 if (left)
664 old_oid = one;
665 if (right)
666 new_oid = two;
667
668 cp.git_cmd = 1;
669 cp.dir = path;
670 cp.out = -1;
671 cp.no_stdin = 1;
672
673 /* TODO: other options may need to be passed here. */
674 strvec_pushl(&cp.args, "diff", "--submodule=diff", NULL);
675 strvec_pushf(&cp.args, "--color=%s", want_color(o->use_color) ?
676 "always" : "never");
677
678 if (o->flags.reverse_diff) {
679 strvec_pushf(&cp.args, "--src-prefix=%s%s/",
680 o->b_prefix, path);
681 strvec_pushf(&cp.args, "--dst-prefix=%s%s/",
682 o->a_prefix, path);
683 } else {
684 strvec_pushf(&cp.args, "--src-prefix=%s%s/",
685 o->a_prefix, path);
686 strvec_pushf(&cp.args, "--dst-prefix=%s%s/",
687 o->b_prefix, path);
688 }
689 strvec_push(&cp.args, oid_to_hex(old_oid));
690 /*
691 * If the submodule has modified content, we will diff against the
692 * work tree, under the assumption that the user has asked for the
693 * diff format and wishes to actually see all differences even if they
694 * haven't yet been committed to the submodule yet.
695 */
696 if (!(dirty_submodule & DIRTY_SUBMODULE_MODIFIED))
697 strvec_push(&cp.args, oid_to_hex(new_oid));
698
699 prepare_submodule_repo_env(&cp.env_array);
700 if (start_command(&cp))
701 diff_emit_submodule_error(o, "(diff failed)\n");
702
703 while (strbuf_getwholeline_fd(&sb, cp.out, '\n') != EOF)
704 diff_emit_submodule_pipethrough(o, sb.buf, sb.len);
705
706 if (finish_command(&cp))
707 diff_emit_submodule_error(o, "(diff failed)\n");
708
709 done:
710 strbuf_release(&sb);
711 if (merge_bases)
712 free_commit_list(merge_bases);
713 if (left)
714 clear_commit_marks(left, ~0);
715 if (right)
716 clear_commit_marks(right, ~0);
717 if (sub) {
718 repo_clear(sub);
719 free(sub);
720 }
721 }
722
723 int should_update_submodules(void)
724 {
725 return config_update_recurse_submodules == RECURSE_SUBMODULES_ON;
726 }
727
728 const struct submodule *submodule_from_ce(const struct cache_entry *ce)
729 {
730 if (!S_ISGITLINK(ce->ce_mode))
731 return NULL;
732
733 if (!should_update_submodules())
734 return NULL;
735
736 return submodule_from_path(the_repository, null_oid(), ce->name);
737 }
738
739 static struct oid_array *submodule_commits(struct string_list *submodules,
740 const char *name)
741 {
742 struct string_list_item *item;
743
744 item = string_list_insert(submodules, name);
745 if (item->util)
746 return (struct oid_array *) item->util;
747
748 /* NEEDSWORK: should we have oid_array_init()? */
749 item->util = xcalloc(1, sizeof(struct oid_array));
750 return (struct oid_array *) item->util;
751 }
752
753 struct collect_changed_submodules_cb_data {
754 struct repository *repo;
755 struct string_list *changed;
756 const struct object_id *commit_oid;
757 };
758
759 /*
760 * this would normally be two functions: default_name_from_path() and
761 * path_from_default_name(). Since the default name is the same as
762 * the submodule path we can get away with just one function which only
763 * checks whether there is a submodule in the working directory at that
764 * location.
765 */
766 static const char *default_name_or_path(const char *path_or_name)
767 {
768 int error_code;
769
770 if (!is_submodule_populated_gently(path_or_name, &error_code))
771 return NULL;
772
773 return path_or_name;
774 }
775
776 static void collect_changed_submodules_cb(struct diff_queue_struct *q,
777 struct diff_options *options,
778 void *data)
779 {
780 struct collect_changed_submodules_cb_data *me = data;
781 struct string_list *changed = me->changed;
782 const struct object_id *commit_oid = me->commit_oid;
783 int i;
784
785 for (i = 0; i < q->nr; i++) {
786 struct diff_filepair *p = q->queue[i];
787 struct oid_array *commits;
788 const struct submodule *submodule;
789 const char *name;
790
791 if (!S_ISGITLINK(p->two->mode))
792 continue;
793
794 submodule = submodule_from_path(me->repo,
795 commit_oid, p->two->path);
796 if (submodule)
797 name = submodule->name;
798 else {
799 name = default_name_or_path(p->two->path);
800 /* make sure name does not collide with existing one */
801 if (name)
802 submodule = submodule_from_name(me->repo,
803 commit_oid, name);
804 if (submodule) {
805 warning(_("Submodule in commit %s at path: "
806 "'%s' collides with a submodule named "
807 "the same. Skipping it."),
808 oid_to_hex(commit_oid), p->two->path);
809 name = NULL;
810 }
811 }
812
813 if (!name)
814 continue;
815
816 commits = submodule_commits(changed, name);
817 oid_array_append(commits, &p->two->oid);
818 }
819 }
820
821 /*
822 * Collect the paths of submodules in 'changed' which have changed based on
823 * the revisions as specified in 'argv'. Each entry in 'changed' will also
824 * have a corresponding 'struct oid_array' (in the 'util' field) which lists
825 * what the submodule pointers were updated to during the change.
826 */
827 static void collect_changed_submodules(struct repository *r,
828 struct string_list *changed,
829 struct strvec *argv)
830 {
831 struct rev_info rev;
832 const struct commit *commit;
833 int save_warning;
834 struct setup_revision_opt s_r_opt = {
835 .assume_dashdash = 1,
836 };
837
838 save_warning = warn_on_object_refname_ambiguity;
839 warn_on_object_refname_ambiguity = 0;
840 repo_init_revisions(r, &rev, NULL);
841 setup_revisions(argv->nr, argv->v, &rev, &s_r_opt);
842 warn_on_object_refname_ambiguity = save_warning;
843 if (prepare_revision_walk(&rev))
844 die(_("revision walk setup failed"));
845
846 while ((commit = get_revision(&rev))) {
847 struct rev_info diff_rev;
848 struct collect_changed_submodules_cb_data data;
849 data.repo = r;
850 data.changed = changed;
851 data.commit_oid = &commit->object.oid;
852
853 repo_init_revisions(r, &diff_rev, NULL);
854 diff_rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
855 diff_rev.diffopt.format_callback = collect_changed_submodules_cb;
856 diff_rev.diffopt.format_callback_data = &data;
857 diff_rev.dense_combined_merges = 1;
858 diff_tree_combined_merge(commit, &diff_rev);
859 }
860
861 reset_revision_walk();
862 }
863
864 static void free_submodules_oids(struct string_list *submodules)
865 {
866 struct string_list_item *item;
867 for_each_string_list_item(item, submodules)
868 oid_array_clear((struct oid_array *) item->util);
869 string_list_clear(submodules, 1);
870 }
871
872 static int has_remote(const char *refname, const struct object_id *oid,
873 int flags, void *cb_data)
874 {
875 return 1;
876 }
877
878 static int append_oid_to_argv(const struct object_id *oid, void *data)
879 {
880 struct strvec *argv = data;
881 strvec_push(argv, oid_to_hex(oid));
882 return 0;
883 }
884
885 struct has_commit_data {
886 struct repository *repo;
887 int result;
888 const char *path;
889 };
890
891 static int check_has_commit(const struct object_id *oid, void *data)
892 {
893 struct has_commit_data *cb = data;
894
895 enum object_type type = oid_object_info(cb->repo, oid, NULL);
896
897 switch (type) {
898 case OBJ_COMMIT:
899 return 0;
900 case OBJ_BAD:
901 /*
902 * Object is missing or invalid. If invalid, an error message
903 * has already been printed.
904 */
905 cb->result = 0;
906 return 0;
907 default:
908 die(_("submodule entry '%s' (%s) is a %s, not a commit"),
909 cb->path, oid_to_hex(oid), type_name(type));
910 }
911 }
912
913 static int submodule_has_commits(struct repository *r,
914 const char *path,
915 struct oid_array *commits)
916 {
917 struct has_commit_data has_commit = { r, 1, path };
918
919 /*
920 * Perform a cheap, but incorrect check for the existence of 'commits'.
921 * This is done by adding the submodule's object store to the in-core
922 * object store, and then querying for each commit's existence. If we
923 * do not have the commit object anywhere, there is no chance we have
924 * it in the object store of the correct submodule and have it
925 * reachable from a ref, so we can fail early without spawning rev-list
926 * which is expensive.
927 */
928 if (add_submodule_odb(path))
929 return 0;
930
931 oid_array_for_each_unique(commits, check_has_commit, &has_commit);
932
933 if (has_commit.result) {
934 /*
935 * Even if the submodule is checked out and the commit is
936 * present, make sure it exists in the submodule's object store
937 * and that it is reachable from a ref.
938 */
939 struct child_process cp = CHILD_PROCESS_INIT;
940 struct strbuf out = STRBUF_INIT;
941
942 strvec_pushl(&cp.args, "rev-list", "-n", "1", NULL);
943 oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args);
944 strvec_pushl(&cp.args, "--not", "--all", NULL);
945
946 prepare_submodule_repo_env(&cp.env_array);
947 cp.git_cmd = 1;
948 cp.no_stdin = 1;
949 cp.dir = path;
950
951 if (capture_command(&cp, &out, GIT_MAX_HEXSZ + 1) || out.len)
952 has_commit.result = 0;
953
954 strbuf_release(&out);
955 }
956
957 return has_commit.result;
958 }
959
960 static int submodule_needs_pushing(struct repository *r,
961 const char *path,
962 struct oid_array *commits)
963 {
964 if (!submodule_has_commits(r, path, commits))
965 /*
966 * NOTE: We do consider it safe to return "no" here. The
967 * correct answer would be "We do not know" instead of
968 * "No push needed", but it is quite hard to change
969 * the submodule pointer without having the submodule
970 * around. If a user did however change the submodules
971 * without having the submodule around, this indicates
972 * an expert who knows what they are doing or a
973 * maintainer integrating work from other people. In
974 * both cases it should be safe to skip this check.
975 */
976 return 0;
977
978 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
979 struct child_process cp = CHILD_PROCESS_INIT;
980 struct strbuf buf = STRBUF_INIT;
981 int needs_pushing = 0;
982
983 strvec_push(&cp.args, "rev-list");
984 oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args);
985 strvec_pushl(&cp.args, "--not", "--remotes", "-n", "1" , NULL);
986
987 prepare_submodule_repo_env(&cp.env_array);
988 cp.git_cmd = 1;
989 cp.no_stdin = 1;
990 cp.out = -1;
991 cp.dir = path;
992 if (start_command(&cp))
993 die(_("Could not run 'git rev-list <commits> --not --remotes -n 1' command in submodule %s"),
994 path);
995 if (strbuf_read(&buf, cp.out, the_hash_algo->hexsz + 1))
996 needs_pushing = 1;
997 finish_command(&cp);
998 close(cp.out);
999 strbuf_release(&buf);
1000 return needs_pushing;
1001 }
1002
1003 return 0;
1004 }
1005
1006 int find_unpushed_submodules(struct repository *r,
1007 struct oid_array *commits,
1008 const char *remotes_name,
1009 struct string_list *needs_pushing)
1010 {
1011 struct string_list submodules = STRING_LIST_INIT_DUP;
1012 struct string_list_item *name;
1013 struct strvec argv = STRVEC_INIT;
1014
1015 /* argv.v[0] will be ignored by setup_revisions */
1016 strvec_push(&argv, "find_unpushed_submodules");
1017 oid_array_for_each_unique(commits, append_oid_to_argv, &argv);
1018 strvec_push(&argv, "--not");
1019 strvec_pushf(&argv, "--remotes=%s", remotes_name);
1020
1021 collect_changed_submodules(r, &submodules, &argv);
1022
1023 for_each_string_list_item(name, &submodules) {
1024 struct oid_array *commits = name->util;
1025 const struct submodule *submodule;
1026 const char *path = NULL;
1027
1028 submodule = submodule_from_name(r, null_oid(), name->string);
1029 if (submodule)
1030 path = submodule->path;
1031 else
1032 path = default_name_or_path(name->string);
1033
1034 if (!path)
1035 continue;
1036
1037 if (submodule_needs_pushing(r, path, commits))
1038 string_list_insert(needs_pushing, path);
1039 }
1040
1041 free_submodules_oids(&submodules);
1042 strvec_clear(&argv);
1043
1044 return needs_pushing->nr;
1045 }
1046
1047 static int push_submodule(const char *path,
1048 const struct remote *remote,
1049 const struct refspec *rs,
1050 const struct string_list *push_options,
1051 int dry_run)
1052 {
1053 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
1054 struct child_process cp = CHILD_PROCESS_INIT;
1055 strvec_push(&cp.args, "push");
1056 if (dry_run)
1057 strvec_push(&cp.args, "--dry-run");
1058
1059 if (push_options && push_options->nr) {
1060 const struct string_list_item *item;
1061 for_each_string_list_item(item, push_options)
1062 strvec_pushf(&cp.args, "--push-option=%s",
1063 item->string);
1064 }
1065
1066 if (remote->origin != REMOTE_UNCONFIGURED) {
1067 int i;
1068 strvec_push(&cp.args, remote->name);
1069 for (i = 0; i < rs->raw_nr; i++)
1070 strvec_push(&cp.args, rs->raw[i]);
1071 }
1072
1073 prepare_submodule_repo_env(&cp.env_array);
1074 cp.git_cmd = 1;
1075 cp.no_stdin = 1;
1076 cp.dir = path;
1077 if (run_command(&cp))
1078 return 0;
1079 close(cp.out);
1080 }
1081
1082 return 1;
1083 }
1084
1085 /*
1086 * Perform a check in the submodule to see if the remote and refspec work.
1087 * Die if the submodule can't be pushed.
1088 */
1089 static void submodule_push_check(const char *path, const char *head,
1090 const struct remote *remote,
1091 const struct refspec *rs)
1092 {
1093 struct child_process cp = CHILD_PROCESS_INIT;
1094 int i;
1095
1096 strvec_push(&cp.args, "submodule--helper");
1097 strvec_push(&cp.args, "push-check");
1098 strvec_push(&cp.args, head);
1099 strvec_push(&cp.args, remote->name);
1100
1101 for (i = 0; i < rs->raw_nr; i++)
1102 strvec_push(&cp.args, rs->raw[i]);
1103
1104 prepare_submodule_repo_env(&cp.env_array);
1105 cp.git_cmd = 1;
1106 cp.no_stdin = 1;
1107 cp.no_stdout = 1;
1108 cp.dir = path;
1109
1110 /*
1111 * Simply indicate if 'submodule--helper push-check' failed.
1112 * More detailed error information will be provided by the
1113 * child process.
1114 */
1115 if (run_command(&cp))
1116 die(_("process for submodule '%s' failed"), path);
1117 }
1118
1119 int push_unpushed_submodules(struct repository *r,
1120 struct oid_array *commits,
1121 const struct remote *remote,
1122 const struct refspec *rs,
1123 const struct string_list *push_options,
1124 int dry_run)
1125 {
1126 int i, ret = 1;
1127 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1128
1129 if (!find_unpushed_submodules(r, commits,
1130 remote->name, &needs_pushing))
1131 return 1;
1132
1133 /*
1134 * Verify that the remote and refspec can be propagated to all
1135 * submodules. This check can be skipped if the remote and refspec
1136 * won't be propagated due to the remote being unconfigured (e.g. a URL
1137 * instead of a remote name).
1138 */
1139 if (remote->origin != REMOTE_UNCONFIGURED) {
1140 char *head;
1141 struct object_id head_oid;
1142
1143 head = resolve_refdup("HEAD", 0, &head_oid, NULL);
1144 if (!head)
1145 die(_("Failed to resolve HEAD as a valid ref."));
1146
1147 for (i = 0; i < needs_pushing.nr; i++)
1148 submodule_push_check(needs_pushing.items[i].string,
1149 head, remote, rs);
1150 free(head);
1151 }
1152
1153 /* Actually push the submodules */
1154 for (i = 0; i < needs_pushing.nr; i++) {
1155 const char *path = needs_pushing.items[i].string;
1156 fprintf(stderr, _("Pushing submodule '%s'\n"), path);
1157 if (!push_submodule(path, remote, rs,
1158 push_options, dry_run)) {
1159 fprintf(stderr, _("Unable to push submodule '%s'\n"), path);
1160 ret = 0;
1161 }
1162 }
1163
1164 string_list_clear(&needs_pushing, 0);
1165
1166 return ret;
1167 }
1168
1169 static int append_oid_to_array(const char *ref, const struct object_id *oid,
1170 int flags, void *data)
1171 {
1172 struct oid_array *array = data;
1173 oid_array_append(array, oid);
1174 return 0;
1175 }
1176
1177 void check_for_new_submodule_commits(struct object_id *oid)
1178 {
1179 if (!initialized_fetch_ref_tips) {
1180 for_each_ref(append_oid_to_array, &ref_tips_before_fetch);
1181 initialized_fetch_ref_tips = 1;
1182 }
1183
1184 oid_array_append(&ref_tips_after_fetch, oid);
1185 }
1186
1187 static void calculate_changed_submodule_paths(struct repository *r,
1188 struct string_list *changed_submodule_names)
1189 {
1190 struct strvec argv = STRVEC_INIT;
1191 struct string_list_item *name;
1192
1193 /* No need to check if there are no submodules configured */
1194 if (!submodule_from_path(r, NULL, NULL))
1195 return;
1196
1197 strvec_push(&argv, "--"); /* argv[0] program name */
1198 oid_array_for_each_unique(&ref_tips_after_fetch,
1199 append_oid_to_argv, &argv);
1200 strvec_push(&argv, "--not");
1201 oid_array_for_each_unique(&ref_tips_before_fetch,
1202 append_oid_to_argv, &argv);
1203
1204 /*
1205 * Collect all submodules (whether checked out or not) for which new
1206 * commits have been recorded upstream in "changed_submodule_names".
1207 */
1208 collect_changed_submodules(r, changed_submodule_names, &argv);
1209
1210 for_each_string_list_item(name, changed_submodule_names) {
1211 struct oid_array *commits = name->util;
1212 const struct submodule *submodule;
1213 const char *path = NULL;
1214
1215 submodule = submodule_from_name(r, null_oid(), name->string);
1216 if (submodule)
1217 path = submodule->path;
1218 else
1219 path = default_name_or_path(name->string);
1220
1221 if (!path)
1222 continue;
1223
1224 if (submodule_has_commits(r, path, commits)) {
1225 oid_array_clear(commits);
1226 *name->string = '\0';
1227 }
1228 }
1229
1230 string_list_remove_empty_items(changed_submodule_names, 1);
1231
1232 strvec_clear(&argv);
1233 oid_array_clear(&ref_tips_before_fetch);
1234 oid_array_clear(&ref_tips_after_fetch);
1235 initialized_fetch_ref_tips = 0;
1236 }
1237
1238 int submodule_touches_in_range(struct repository *r,
1239 struct object_id *excl_oid,
1240 struct object_id *incl_oid)
1241 {
1242 struct string_list subs = STRING_LIST_INIT_DUP;
1243 struct strvec args = STRVEC_INIT;
1244 int ret;
1245
1246 /* No need to check if there are no submodules configured */
1247 if (!submodule_from_path(r, NULL, NULL))
1248 return 0;
1249
1250 strvec_push(&args, "--"); /* args[0] program name */
1251 strvec_push(&args, oid_to_hex(incl_oid));
1252 if (!is_null_oid(excl_oid)) {
1253 strvec_push(&args, "--not");
1254 strvec_push(&args, oid_to_hex(excl_oid));
1255 }
1256
1257 collect_changed_submodules(r, &subs, &args);
1258 ret = subs.nr;
1259
1260 strvec_clear(&args);
1261
1262 free_submodules_oids(&subs);
1263 return ret;
1264 }
1265
1266 struct submodule_parallel_fetch {
1267 int count;
1268 struct strvec args;
1269 struct repository *r;
1270 const char *prefix;
1271 int command_line_option;
1272 int default_option;
1273 int quiet;
1274 int result;
1275
1276 struct string_list changed_submodule_names;
1277
1278 /* Pending fetches by OIDs */
1279 struct fetch_task **oid_fetch_tasks;
1280 int oid_fetch_tasks_nr, oid_fetch_tasks_alloc;
1281
1282 struct strbuf submodules_with_errors;
1283 };
1284 #define SPF_INIT {0, STRVEC_INIT, NULL, NULL, 0, 0, 0, 0, \
1285 STRING_LIST_INIT_DUP, \
1286 NULL, 0, 0, STRBUF_INIT}
1287
1288 static int get_fetch_recurse_config(const struct submodule *submodule,
1289 struct submodule_parallel_fetch *spf)
1290 {
1291 if (spf->command_line_option != RECURSE_SUBMODULES_DEFAULT)
1292 return spf->command_line_option;
1293
1294 if (submodule) {
1295 char *key;
1296 const char *value;
1297
1298 int fetch_recurse = submodule->fetch_recurse;
1299 key = xstrfmt("submodule.%s.fetchRecurseSubmodules", submodule->name);
1300 if (!repo_config_get_string_tmp(spf->r, key, &value)) {
1301 fetch_recurse = parse_fetch_recurse_submodules_arg(key, value);
1302 }
1303 free(key);
1304
1305 if (fetch_recurse != RECURSE_SUBMODULES_NONE)
1306 /* local config overrules everything except commandline */
1307 return fetch_recurse;
1308 }
1309
1310 return spf->default_option;
1311 }
1312
1313 /*
1314 * Fetch in progress (if callback data) or
1315 * pending (if in oid_fetch_tasks in struct submodule_parallel_fetch)
1316 */
1317 struct fetch_task {
1318 struct repository *repo;
1319 const struct submodule *sub;
1320 unsigned free_sub : 1; /* Do we need to free the submodule? */
1321
1322 struct oid_array *commits; /* Ensure these commits are fetched */
1323 };
1324
1325 /**
1326 * When a submodule is not defined in .gitmodules, we cannot access it
1327 * via the regular submodule-config. Create a fake submodule, which we can
1328 * work on.
1329 */
1330 static const struct submodule *get_non_gitmodules_submodule(const char *path)
1331 {
1332 struct submodule *ret = NULL;
1333 const char *name = default_name_or_path(path);
1334
1335 if (!name)
1336 return NULL;
1337
1338 ret = xmalloc(sizeof(*ret));
1339 memset(ret, 0, sizeof(*ret));
1340 ret->path = name;
1341 ret->name = name;
1342
1343 return (const struct submodule *) ret;
1344 }
1345
1346 static struct fetch_task *fetch_task_create(struct repository *r,
1347 const char *path)
1348 {
1349 struct fetch_task *task = xmalloc(sizeof(*task));
1350 memset(task, 0, sizeof(*task));
1351
1352 task->sub = submodule_from_path(r, null_oid(), path);
1353 if (!task->sub) {
1354 /*
1355 * No entry in .gitmodules? Technically not a submodule,
1356 * but historically we supported repositories that happen to be
1357 * in-place where a gitlink is. Keep supporting them.
1358 */
1359 task->sub = get_non_gitmodules_submodule(path);
1360 if (!task->sub) {
1361 free(task);
1362 return NULL;
1363 }
1364
1365 task->free_sub = 1;
1366 }
1367
1368 return task;
1369 }
1370
1371 static void fetch_task_release(struct fetch_task *p)
1372 {
1373 if (p->free_sub)
1374 free((void*)p->sub);
1375 p->free_sub = 0;
1376 p->sub = NULL;
1377
1378 if (p->repo)
1379 repo_clear(p->repo);
1380 FREE_AND_NULL(p->repo);
1381 }
1382
1383 static struct repository *get_submodule_repo_for(struct repository *r,
1384 const struct submodule *sub)
1385 {
1386 struct repository *ret = xmalloc(sizeof(*ret));
1387
1388 if (repo_submodule_init(ret, r, sub)) {
1389 /*
1390 * No entry in .gitmodules? Technically not a submodule,
1391 * but historically we supported repositories that happen to be
1392 * in-place where a gitlink is. Keep supporting them.
1393 */
1394 struct strbuf gitdir = STRBUF_INIT;
1395 strbuf_repo_worktree_path(&gitdir, r, "%s/.git", sub->path);
1396 if (repo_init(ret, gitdir.buf, NULL)) {
1397 strbuf_release(&gitdir);
1398 free(ret);
1399 return NULL;
1400 }
1401 strbuf_release(&gitdir);
1402 }
1403
1404 return ret;
1405 }
1406
1407 static int get_next_submodule(struct child_process *cp,
1408 struct strbuf *err, void *data, void **task_cb)
1409 {
1410 struct submodule_parallel_fetch *spf = data;
1411
1412 for (; spf->count < spf->r->index->cache_nr; spf->count++) {
1413 const struct cache_entry *ce = spf->r->index->cache[spf->count];
1414 const char *default_argv;
1415 struct fetch_task *task;
1416
1417 if (!S_ISGITLINK(ce->ce_mode))
1418 continue;
1419
1420 task = fetch_task_create(spf->r, ce->name);
1421 if (!task)
1422 continue;
1423
1424 switch (get_fetch_recurse_config(task->sub, spf))
1425 {
1426 default:
1427 case RECURSE_SUBMODULES_DEFAULT:
1428 case RECURSE_SUBMODULES_ON_DEMAND:
1429 if (!task->sub ||
1430 !string_list_lookup(
1431 &spf->changed_submodule_names,
1432 task->sub->name))
1433 continue;
1434 default_argv = "on-demand";
1435 break;
1436 case RECURSE_SUBMODULES_ON:
1437 default_argv = "yes";
1438 break;
1439 case RECURSE_SUBMODULES_OFF:
1440 continue;
1441 }
1442
1443 task->repo = get_submodule_repo_for(spf->r, task->sub);
1444 if (task->repo) {
1445 struct strbuf submodule_prefix = STRBUF_INIT;
1446 child_process_init(cp);
1447 cp->dir = task->repo->gitdir;
1448 prepare_submodule_repo_env_in_gitdir(&cp->env_array);
1449 cp->git_cmd = 1;
1450 if (!spf->quiet)
1451 strbuf_addf(err, _("Fetching submodule %s%s\n"),
1452 spf->prefix, ce->name);
1453 strvec_init(&cp->args);
1454 strvec_pushv(&cp->args, spf->args.v);
1455 strvec_push(&cp->args, default_argv);
1456 strvec_push(&cp->args, "--submodule-prefix");
1457
1458 strbuf_addf(&submodule_prefix, "%s%s/",
1459 spf->prefix,
1460 task->sub->path);
1461 strvec_push(&cp->args, submodule_prefix.buf);
1462
1463 spf->count++;
1464 *task_cb = task;
1465
1466 strbuf_release(&submodule_prefix);
1467 return 1;
1468 } else {
1469 struct strbuf empty_submodule_path = STRBUF_INIT;
1470
1471 fetch_task_release(task);
1472 free(task);
1473
1474 /*
1475 * An empty directory is normal,
1476 * the submodule is not initialized
1477 */
1478 strbuf_addf(&empty_submodule_path, "%s/%s/",
1479 spf->r->worktree,
1480 ce->name);
1481 if (S_ISGITLINK(ce->ce_mode) &&
1482 !is_empty_dir(empty_submodule_path.buf)) {
1483 spf->result = 1;
1484 strbuf_addf(err,
1485 _("Could not access submodule '%s'\n"),
1486 ce->name);
1487 }
1488 strbuf_release(&empty_submodule_path);
1489 }
1490 }
1491
1492 if (spf->oid_fetch_tasks_nr) {
1493 struct fetch_task *task =
1494 spf->oid_fetch_tasks[spf->oid_fetch_tasks_nr - 1];
1495 struct strbuf submodule_prefix = STRBUF_INIT;
1496 spf->oid_fetch_tasks_nr--;
1497
1498 strbuf_addf(&submodule_prefix, "%s%s/",
1499 spf->prefix, task->sub->path);
1500
1501 child_process_init(cp);
1502 prepare_submodule_repo_env_in_gitdir(&cp->env_array);
1503 cp->git_cmd = 1;
1504 cp->dir = task->repo->gitdir;
1505
1506 strvec_init(&cp->args);
1507 strvec_pushv(&cp->args, spf->args.v);
1508 strvec_push(&cp->args, "on-demand");
1509 strvec_push(&cp->args, "--submodule-prefix");
1510 strvec_push(&cp->args, submodule_prefix.buf);
1511
1512 /* NEEDSWORK: have get_default_remote from submodule--helper */
1513 strvec_push(&cp->args, "origin");
1514 oid_array_for_each_unique(task->commits,
1515 append_oid_to_argv, &cp->args);
1516
1517 *task_cb = task;
1518 strbuf_release(&submodule_prefix);
1519 return 1;
1520 }
1521
1522 return 0;
1523 }
1524
1525 static int fetch_start_failure(struct strbuf *err,
1526 void *cb, void *task_cb)
1527 {
1528 struct submodule_parallel_fetch *spf = cb;
1529 struct fetch_task *task = task_cb;
1530
1531 spf->result = 1;
1532
1533 fetch_task_release(task);
1534 return 0;
1535 }
1536
1537 static int commit_missing_in_sub(const struct object_id *oid, void *data)
1538 {
1539 struct repository *subrepo = data;
1540
1541 enum object_type type = oid_object_info(subrepo, oid, NULL);
1542
1543 return type != OBJ_COMMIT;
1544 }
1545
1546 static int fetch_finish(int retvalue, struct strbuf *err,
1547 void *cb, void *task_cb)
1548 {
1549 struct submodule_parallel_fetch *spf = cb;
1550 struct fetch_task *task = task_cb;
1551
1552 struct string_list_item *it;
1553 struct oid_array *commits;
1554
1555 if (!task || !task->sub)
1556 BUG("callback cookie bogus");
1557
1558 if (retvalue) {
1559 /*
1560 * NEEDSWORK: This indicates that the overall fetch
1561 * failed, even though there may be a subsequent fetch
1562 * by commit hash that might work. It may be a good
1563 * idea to not indicate failure in this case, and only
1564 * indicate failure if the subsequent fetch fails.
1565 */
1566 spf->result = 1;
1567
1568 strbuf_addf(&spf->submodules_with_errors, "\t%s\n",
1569 task->sub->name);
1570 }
1571
1572 /* Is this the second time we process this submodule? */
1573 if (task->commits)
1574 goto out;
1575
1576 it = string_list_lookup(&spf->changed_submodule_names, task->sub->name);
1577 if (!it)
1578 /* Could be an unchanged submodule, not contained in the list */
1579 goto out;
1580
1581 commits = it->util;
1582 oid_array_filter(commits,
1583 commit_missing_in_sub,
1584 task->repo);
1585
1586 /* Are there commits we want, but do not exist? */
1587 if (commits->nr) {
1588 task->commits = commits;
1589 ALLOC_GROW(spf->oid_fetch_tasks,
1590 spf->oid_fetch_tasks_nr + 1,
1591 spf->oid_fetch_tasks_alloc);
1592 spf->oid_fetch_tasks[spf->oid_fetch_tasks_nr] = task;
1593 spf->oid_fetch_tasks_nr++;
1594 return 0;
1595 }
1596
1597 out:
1598 fetch_task_release(task);
1599
1600 return 0;
1601 }
1602
1603 int fetch_populated_submodules(struct repository *r,
1604 const struct strvec *options,
1605 const char *prefix, int command_line_option,
1606 int default_option,
1607 int quiet, int max_parallel_jobs)
1608 {
1609 int i;
1610 struct submodule_parallel_fetch spf = SPF_INIT;
1611
1612 spf.r = r;
1613 spf.command_line_option = command_line_option;
1614 spf.default_option = default_option;
1615 spf.quiet = quiet;
1616 spf.prefix = prefix;
1617
1618 if (!r->worktree)
1619 goto out;
1620
1621 if (repo_read_index(r) < 0)
1622 die(_("index file corrupt"));
1623
1624 strvec_push(&spf.args, "fetch");
1625 for (i = 0; i < options->nr; i++)
1626 strvec_push(&spf.args, options->v[i]);
1627 strvec_push(&spf.args, "--recurse-submodules-default");
1628 /* default value, "--submodule-prefix" and its value are added later */
1629
1630 calculate_changed_submodule_paths(r, &spf.changed_submodule_names);
1631 string_list_sort(&spf.changed_submodule_names);
1632 run_processes_parallel_tr2(max_parallel_jobs,
1633 get_next_submodule,
1634 fetch_start_failure,
1635 fetch_finish,
1636 &spf,
1637 "submodule", "parallel/fetch");
1638
1639 if (spf.submodules_with_errors.len > 0)
1640 fprintf(stderr, _("Errors during submodule fetch:\n%s"),
1641 spf.submodules_with_errors.buf);
1642
1643
1644 strvec_clear(&spf.args);
1645 out:
1646 free_submodules_oids(&spf.changed_submodule_names);
1647 return spf.result;
1648 }
1649
1650 unsigned is_submodule_modified(const char *path, int ignore_untracked)
1651 {
1652 struct child_process cp = CHILD_PROCESS_INIT;
1653 struct strbuf buf = STRBUF_INIT;
1654 FILE *fp;
1655 unsigned dirty_submodule = 0;
1656 const char *git_dir;
1657 int ignore_cp_exit_code = 0;
1658
1659 strbuf_addf(&buf, "%s/.git", path);
1660 git_dir = read_gitfile(buf.buf);
1661 if (!git_dir)
1662 git_dir = buf.buf;
1663 if (!is_git_directory(git_dir)) {
1664 if (is_directory(git_dir))
1665 die(_("'%s' not recognized as a git repository"), git_dir);
1666 strbuf_release(&buf);
1667 /* The submodule is not checked out, so it is not modified */
1668 return 0;
1669 }
1670 strbuf_reset(&buf);
1671
1672 strvec_pushl(&cp.args, "status", "--porcelain=2", NULL);
1673 if (ignore_untracked)
1674 strvec_push(&cp.args, "-uno");
1675
1676 prepare_submodule_repo_env(&cp.env_array);
1677 cp.git_cmd = 1;
1678 cp.no_stdin = 1;
1679 cp.out = -1;
1680 cp.dir = path;
1681 if (start_command(&cp))
1682 die(_("Could not run 'git status --porcelain=2' in submodule %s"), path);
1683
1684 fp = xfdopen(cp.out, "r");
1685 while (strbuf_getwholeline(&buf, fp, '\n') != EOF) {
1686 /* regular untracked files */
1687 if (buf.buf[0] == '?')
1688 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
1689
1690 if (buf.buf[0] == 'u' ||
1691 buf.buf[0] == '1' ||
1692 buf.buf[0] == '2') {
1693 /* T = line type, XY = status, SSSS = submodule state */
1694 if (buf.len < strlen("T XY SSSS"))
1695 BUG("invalid status --porcelain=2 line %s",
1696 buf.buf);
1697
1698 if (buf.buf[5] == 'S' && buf.buf[8] == 'U')
1699 /* nested untracked file */
1700 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
1701
1702 if (buf.buf[0] == 'u' ||
1703 buf.buf[0] == '2' ||
1704 memcmp(buf.buf + 5, "S..U", 4))
1705 /* other change */
1706 dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
1707 }
1708
1709 if ((dirty_submodule & DIRTY_SUBMODULE_MODIFIED) &&
1710 ((dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ||
1711 ignore_untracked)) {
1712 /*
1713 * We're not interested in any further information from
1714 * the child any more, neither output nor its exit code.
1715 */
1716 ignore_cp_exit_code = 1;
1717 break;
1718 }
1719 }
1720 fclose(fp);
1721
1722 if (finish_command(&cp) && !ignore_cp_exit_code)
1723 die(_("'git status --porcelain=2' failed in submodule %s"), path);
1724
1725 strbuf_release(&buf);
1726 return dirty_submodule;
1727 }
1728
1729 int submodule_uses_gitfile(const char *path)
1730 {
1731 struct child_process cp = CHILD_PROCESS_INIT;
1732 struct strbuf buf = STRBUF_INIT;
1733 const char *git_dir;
1734
1735 strbuf_addf(&buf, "%s/.git", path);
1736 git_dir = read_gitfile(buf.buf);
1737 if (!git_dir) {
1738 strbuf_release(&buf);
1739 return 0;
1740 }
1741 strbuf_release(&buf);
1742
1743 /* Now test that all nested submodules use a gitfile too */
1744 strvec_pushl(&cp.args,
1745 "submodule", "foreach", "--quiet", "--recursive",
1746 "test -f .git", NULL);
1747
1748 prepare_submodule_repo_env(&cp.env_array);
1749 cp.git_cmd = 1;
1750 cp.no_stdin = 1;
1751 cp.no_stderr = 1;
1752 cp.no_stdout = 1;
1753 cp.dir = path;
1754 if (run_command(&cp))
1755 return 0;
1756
1757 return 1;
1758 }
1759
1760 /*
1761 * Check if it is a bad idea to remove a submodule, i.e. if we'd lose data
1762 * when doing so.
1763 *
1764 * Return 1 if we'd lose data, return 0 if the removal is fine,
1765 * and negative values for errors.
1766 */
1767 int bad_to_remove_submodule(const char *path, unsigned flags)
1768 {
1769 ssize_t len;
1770 struct child_process cp = CHILD_PROCESS_INIT;
1771 struct strbuf buf = STRBUF_INIT;
1772 int ret = 0;
1773
1774 if (!file_exists(path) || is_empty_dir(path))
1775 return 0;
1776
1777 if (!submodule_uses_gitfile(path))
1778 return 1;
1779
1780 strvec_pushl(&cp.args, "status", "--porcelain",
1781 "--ignore-submodules=none", NULL);
1782
1783 if (flags & SUBMODULE_REMOVAL_IGNORE_UNTRACKED)
1784 strvec_push(&cp.args, "-uno");
1785 else
1786 strvec_push(&cp.args, "-uall");
1787
1788 if (!(flags & SUBMODULE_REMOVAL_IGNORE_IGNORED_UNTRACKED))
1789 strvec_push(&cp.args, "--ignored");
1790
1791 prepare_submodule_repo_env(&cp.env_array);
1792 cp.git_cmd = 1;
1793 cp.no_stdin = 1;
1794 cp.out = -1;
1795 cp.dir = path;
1796 if (start_command(&cp)) {
1797 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
1798 die(_("could not start 'git status' in submodule '%s'"),
1799 path);
1800 ret = -1;
1801 goto out;
1802 }
1803
1804 len = strbuf_read(&buf, cp.out, 1024);
1805 if (len > 2)
1806 ret = 1;
1807 close(cp.out);
1808
1809 if (finish_command(&cp)) {
1810 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
1811 die(_("could not run 'git status' in submodule '%s'"),
1812 path);
1813 ret = -1;
1814 }
1815 out:
1816 strbuf_release(&buf);
1817 return ret;
1818 }
1819
1820 void submodule_unset_core_worktree(const struct submodule *sub)
1821 {
1822 char *config_path = xstrfmt("%s/modules/%s/config",
1823 get_git_dir(), sub->name);
1824
1825 if (git_config_set_in_file_gently(config_path, "core.worktree", NULL))
1826 warning(_("Could not unset core.worktree setting in submodule '%s'"),
1827 sub->path);
1828
1829 free(config_path);
1830 }
1831
1832 static const char *get_super_prefix_or_empty(void)
1833 {
1834 const char *s = get_super_prefix();
1835 if (!s)
1836 s = "";
1837 return s;
1838 }
1839
1840 static int submodule_has_dirty_index(const struct submodule *sub)
1841 {
1842 struct child_process cp = CHILD_PROCESS_INIT;
1843
1844 prepare_submodule_repo_env(&cp.env_array);
1845
1846 cp.git_cmd = 1;
1847 strvec_pushl(&cp.args, "diff-index", "--quiet",
1848 "--cached", "HEAD", NULL);
1849 cp.no_stdin = 1;
1850 cp.no_stdout = 1;
1851 cp.dir = sub->path;
1852 if (start_command(&cp))
1853 die(_("could not recurse into submodule '%s'"), sub->path);
1854
1855 return finish_command(&cp);
1856 }
1857
1858 static void submodule_reset_index(const char *path)
1859 {
1860 struct child_process cp = CHILD_PROCESS_INIT;
1861 prepare_submodule_repo_env(&cp.env_array);
1862
1863 cp.git_cmd = 1;
1864 cp.no_stdin = 1;
1865 cp.dir = path;
1866
1867 strvec_pushf(&cp.args, "--super-prefix=%s%s/",
1868 get_super_prefix_or_empty(), path);
1869 strvec_pushl(&cp.args, "read-tree", "-u", "--reset", NULL);
1870
1871 strvec_push(&cp.args, empty_tree_oid_hex());
1872
1873 if (run_command(&cp))
1874 die(_("could not reset submodule index"));
1875 }
1876
1877 /**
1878 * Moves a submodule at a given path from a given head to another new head.
1879 * For edge cases (a submodule coming into existence or removing a submodule)
1880 * pass NULL for old or new respectively.
1881 */
1882 int submodule_move_head(const char *path,
1883 const char *old_head,
1884 const char *new_head,
1885 unsigned flags)
1886 {
1887 int ret = 0;
1888 struct child_process cp = CHILD_PROCESS_INIT;
1889 const struct submodule *sub;
1890 int *error_code_ptr, error_code;
1891
1892 if (!is_submodule_active(the_repository, path))
1893 return 0;
1894
1895 if (flags & SUBMODULE_MOVE_HEAD_FORCE)
1896 /*
1897 * Pass non NULL pointer to is_submodule_populated_gently
1898 * to prevent die()-ing. We'll use connect_work_tree_and_git_dir
1899 * to fixup the submodule in the force case later.
1900 */
1901 error_code_ptr = &error_code;
1902 else
1903 error_code_ptr = NULL;
1904
1905 if (old_head && !is_submodule_populated_gently(path, error_code_ptr))
1906 return 0;
1907
1908 sub = submodule_from_path(the_repository, null_oid(), path);
1909
1910 if (!sub)
1911 BUG("could not get submodule information for '%s'", path);
1912
1913 if (old_head && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) {
1914 /* Check if the submodule has a dirty index. */
1915 if (submodule_has_dirty_index(sub))
1916 return error(_("submodule '%s' has dirty index"), path);
1917 }
1918
1919 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1920 if (old_head) {
1921 if (!submodule_uses_gitfile(path))
1922 absorb_git_dir_into_superproject(path,
1923 ABSORB_GITDIR_RECURSE_SUBMODULES);
1924 } else {
1925 char *gitdir = xstrfmt("%s/modules/%s",
1926 get_git_dir(), sub->name);
1927 connect_work_tree_and_git_dir(path, gitdir, 0);
1928 free(gitdir);
1929
1930 /* make sure the index is clean as well */
1931 submodule_reset_index(path);
1932 }
1933
1934 if (old_head && (flags & SUBMODULE_MOVE_HEAD_FORCE)) {
1935 char *gitdir = xstrfmt("%s/modules/%s",
1936 get_git_dir(), sub->name);
1937 connect_work_tree_and_git_dir(path, gitdir, 1);
1938 free(gitdir);
1939 }
1940 }
1941
1942 prepare_submodule_repo_env(&cp.env_array);
1943
1944 cp.git_cmd = 1;
1945 cp.no_stdin = 1;
1946 cp.dir = path;
1947
1948 strvec_pushf(&cp.args, "--super-prefix=%s%s/",
1949 get_super_prefix_or_empty(), path);
1950 strvec_pushl(&cp.args, "read-tree", "--recurse-submodules", NULL);
1951
1952 if (flags & SUBMODULE_MOVE_HEAD_DRY_RUN)
1953 strvec_push(&cp.args, "-n");
1954 else
1955 strvec_push(&cp.args, "-u");
1956
1957 if (flags & SUBMODULE_MOVE_HEAD_FORCE)
1958 strvec_push(&cp.args, "--reset");
1959 else
1960 strvec_push(&cp.args, "-m");
1961
1962 if (!(flags & SUBMODULE_MOVE_HEAD_FORCE))
1963 strvec_push(&cp.args, old_head ? old_head : empty_tree_oid_hex());
1964
1965 strvec_push(&cp.args, new_head ? new_head : empty_tree_oid_hex());
1966
1967 if (run_command(&cp)) {
1968 ret = error(_("Submodule '%s' could not be updated."), path);
1969 goto out;
1970 }
1971
1972 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1973 if (new_head) {
1974 child_process_init(&cp);
1975 /* also set the HEAD accordingly */
1976 cp.git_cmd = 1;
1977 cp.no_stdin = 1;
1978 cp.dir = path;
1979
1980 prepare_submodule_repo_env(&cp.env_array);
1981 strvec_pushl(&cp.args, "update-ref", "HEAD",
1982 "--no-deref", new_head, NULL);
1983
1984 if (run_command(&cp)) {
1985 ret = -1;
1986 goto out;
1987 }
1988 } else {
1989 struct strbuf sb = STRBUF_INIT;
1990
1991 strbuf_addf(&sb, "%s/.git", path);
1992 unlink_or_warn(sb.buf);
1993 strbuf_release(&sb);
1994
1995 if (is_empty_dir(path))
1996 rmdir_or_warn(path);
1997
1998 submodule_unset_core_worktree(sub);
1999 }
2000 }
2001 out:
2002 return ret;
2003 }
2004
2005 int validate_submodule_git_dir(char *git_dir, const char *submodule_name)
2006 {
2007 size_t len = strlen(git_dir), suffix_len = strlen(submodule_name);
2008 char *p;
2009 int ret = 0;
2010
2011 if (len <= suffix_len || (p = git_dir + len - suffix_len)[-1] != '/' ||
2012 strcmp(p, submodule_name))
2013 BUG("submodule name '%s' not a suffix of git dir '%s'",
2014 submodule_name, git_dir);
2015
2016 /*
2017 * We prevent the contents of sibling submodules' git directories to
2018 * clash.
2019 *
2020 * Example: having a submodule named `hippo` and another one named
2021 * `hippo/hooks` would result in the git directories
2022 * `.git/modules/hippo/` and `.git/modules/hippo/hooks/`, respectively,
2023 * but the latter directory is already designated to contain the hooks
2024 * of the former.
2025 */
2026 for (; *p; p++) {
2027 if (is_dir_sep(*p)) {
2028 char c = *p;
2029
2030 *p = '\0';
2031 if (is_git_directory(git_dir))
2032 ret = -1;
2033 *p = c;
2034
2035 if (ret < 0)
2036 return error(_("submodule git dir '%s' is "
2037 "inside git dir '%.*s'"),
2038 git_dir,
2039 (int)(p - git_dir), git_dir);
2040 }
2041 }
2042
2043 return 0;
2044 }
2045
2046 /*
2047 * Embeds a single submodules git directory into the superprojects git dir,
2048 * non recursively.
2049 */
2050 static void relocate_single_git_dir_into_superproject(const char *path)
2051 {
2052 char *old_git_dir = NULL, *real_old_git_dir = NULL, *real_new_git_dir = NULL;
2053 char *new_git_dir;
2054 const struct submodule *sub;
2055
2056 if (submodule_uses_worktrees(path))
2057 die(_("relocate_gitdir for submodule '%s' with "
2058 "more than one worktree not supported"), path);
2059
2060 old_git_dir = xstrfmt("%s/.git", path);
2061 if (read_gitfile(old_git_dir))
2062 /* If it is an actual gitfile, it doesn't need migration. */
2063 return;
2064
2065 real_old_git_dir = real_pathdup(old_git_dir, 1);
2066
2067 sub = submodule_from_path(the_repository, null_oid(), path);
2068 if (!sub)
2069 die(_("could not lookup name for submodule '%s'"), path);
2070
2071 new_git_dir = git_pathdup("modules/%s", sub->name);
2072 if (validate_submodule_git_dir(new_git_dir, sub->name) < 0)
2073 die(_("refusing to move '%s' into an existing git dir"),
2074 real_old_git_dir);
2075 if (safe_create_leading_directories_const(new_git_dir) < 0)
2076 die(_("could not create directory '%s'"), new_git_dir);
2077 real_new_git_dir = real_pathdup(new_git_dir, 1);
2078 free(new_git_dir);
2079
2080 fprintf(stderr, _("Migrating git directory of '%s%s' from\n'%s' to\n'%s'\n"),
2081 get_super_prefix_or_empty(), path,
2082 real_old_git_dir, real_new_git_dir);
2083
2084 relocate_gitdir(path, real_old_git_dir, real_new_git_dir);
2085
2086 free(old_git_dir);
2087 free(real_old_git_dir);
2088 free(real_new_git_dir);
2089 }
2090
2091 /*
2092 * Migrate the git directory of the submodule given by path from
2093 * having its git directory within the working tree to the git dir nested
2094 * in its superprojects git dir under modules/.
2095 */
2096 void absorb_git_dir_into_superproject(const char *path,
2097 unsigned flags)
2098 {
2099 int err_code;
2100 const char *sub_git_dir;
2101 struct strbuf gitdir = STRBUF_INIT;
2102 strbuf_addf(&gitdir, "%s/.git", path);
2103 sub_git_dir = resolve_gitdir_gently(gitdir.buf, &err_code);
2104
2105 /* Not populated? */
2106 if (!sub_git_dir) {
2107 const struct submodule *sub;
2108
2109 if (err_code == READ_GITFILE_ERR_STAT_FAILED) {
2110 /* unpopulated as expected */
2111 strbuf_release(&gitdir);
2112 return;
2113 }
2114
2115 if (err_code != READ_GITFILE_ERR_NOT_A_REPO)
2116 /* We don't know what broke here. */
2117 read_gitfile_error_die(err_code, path, NULL);
2118
2119 /*
2120 * Maybe populated, but no git directory was found?
2121 * This can happen if the superproject is a submodule
2122 * itself and was just absorbed. The absorption of the
2123 * superproject did not rewrite the git file links yet,
2124 * fix it now.
2125 */
2126 sub = submodule_from_path(the_repository, null_oid(), path);
2127 if (!sub)
2128 die(_("could not lookup name for submodule '%s'"), path);
2129 connect_work_tree_and_git_dir(path,
2130 git_path("modules/%s", sub->name), 0);
2131 } else {
2132 /* Is it already absorbed into the superprojects git dir? */
2133 char *real_sub_git_dir = real_pathdup(sub_git_dir, 1);
2134 char *real_common_git_dir = real_pathdup(get_git_common_dir(), 1);
2135
2136 if (!starts_with(real_sub_git_dir, real_common_git_dir))
2137 relocate_single_git_dir_into_superproject(path);
2138
2139 free(real_sub_git_dir);
2140 free(real_common_git_dir);
2141 }
2142 strbuf_release(&gitdir);
2143
2144 if (flags & ABSORB_GITDIR_RECURSE_SUBMODULES) {
2145 struct child_process cp = CHILD_PROCESS_INIT;
2146 struct strbuf sb = STRBUF_INIT;
2147
2148 if (flags & ~ABSORB_GITDIR_RECURSE_SUBMODULES)
2149 BUG("we don't know how to pass the flags down?");
2150
2151 strbuf_addstr(&sb, get_super_prefix_or_empty());
2152 strbuf_addstr(&sb, path);
2153 strbuf_addch(&sb, '/');
2154
2155 cp.dir = path;
2156 cp.git_cmd = 1;
2157 cp.no_stdin = 1;
2158 strvec_pushl(&cp.args, "--super-prefix", sb.buf,
2159 "submodule--helper",
2160 "absorb-git-dirs", NULL);
2161 prepare_submodule_repo_env(&cp.env_array);
2162 if (run_command(&cp))
2163 die(_("could not recurse into submodule '%s'"), path);
2164
2165 strbuf_release(&sb);
2166 }
2167 }
2168
2169 int get_superproject_working_tree(struct strbuf *buf)
2170 {
2171 struct child_process cp = CHILD_PROCESS_INIT;
2172 struct strbuf sb = STRBUF_INIT;
2173 struct strbuf one_up = STRBUF_INIT;
2174 const char *cwd = xgetcwd();
2175 int ret = 0;
2176 const char *subpath;
2177 int code;
2178 ssize_t len;
2179
2180 if (!is_inside_work_tree())
2181 /*
2182 * FIXME:
2183 * We might have a superproject, but it is harder
2184 * to determine.
2185 */
2186 return 0;
2187
2188 if (!strbuf_realpath(&one_up, "../", 0))
2189 return 0;
2190
2191 subpath = relative_path(cwd, one_up.buf, &sb);
2192 strbuf_release(&one_up);
2193
2194 prepare_submodule_repo_env(&cp.env_array);
2195 strvec_pop(&cp.env_array);
2196
2197 strvec_pushl(&cp.args, "--literal-pathspecs", "-C", "..",
2198 "ls-files", "-z", "--stage", "--full-name", "--",
2199 subpath, NULL);
2200 strbuf_reset(&sb);
2201
2202 cp.no_stdin = 1;
2203 cp.no_stderr = 1;
2204 cp.out = -1;
2205 cp.git_cmd = 1;
2206
2207 if (start_command(&cp))
2208 die(_("could not start ls-files in .."));
2209
2210 len = strbuf_read(&sb, cp.out, PATH_MAX);
2211 close(cp.out);
2212
2213 if (starts_with(sb.buf, "160000")) {
2214 int super_sub_len;
2215 int cwd_len = strlen(cwd);
2216 char *super_sub, *super_wt;
2217
2218 /*
2219 * There is a superproject having this repo as a submodule.
2220 * The format is <mode> SP <hash> SP <stage> TAB <full name> \0,
2221 * We're only interested in the name after the tab.
2222 */
2223 super_sub = strchr(sb.buf, '\t') + 1;
2224 super_sub_len = strlen(super_sub);
2225
2226 if (super_sub_len > cwd_len ||
2227 strcmp(&cwd[cwd_len - super_sub_len], super_sub))
2228 BUG("returned path string doesn't match cwd?");
2229
2230 super_wt = xstrdup(cwd);
2231 super_wt[cwd_len - super_sub_len] = '\0';
2232
2233 strbuf_realpath(buf, super_wt, 1);
2234 ret = 1;
2235 free(super_wt);
2236 }
2237 strbuf_release(&sb);
2238
2239 code = finish_command(&cp);
2240
2241 if (code == 128)
2242 /* '../' is not a git repository */
2243 return 0;
2244 if (code == 0 && len == 0)
2245 /* There is an unrelated git repository at '../' */
2246 return 0;
2247 if (code)
2248 die(_("ls-tree returned unexpected return code %d"), code);
2249
2250 return ret;
2251 }
2252
2253 /*
2254 * Put the gitdir for a submodule (given relative to the main
2255 * repository worktree) into `buf`, or return -1 on error.
2256 */
2257 int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
2258 {
2259 const struct submodule *sub;
2260 const char *git_dir;
2261 int ret = 0;
2262
2263 strbuf_reset(buf);
2264 strbuf_addstr(buf, submodule);
2265 strbuf_complete(buf, '/');
2266 strbuf_addstr(buf, ".git");
2267
2268 git_dir = read_gitfile(buf->buf);
2269 if (git_dir) {
2270 strbuf_reset(buf);
2271 strbuf_addstr(buf, git_dir);
2272 }
2273 if (!is_git_directory(buf->buf)) {
2274 sub = submodule_from_path(the_repository, null_oid(),
2275 submodule);
2276 if (!sub) {
2277 ret = -1;
2278 goto cleanup;
2279 }
2280 strbuf_reset(buf);
2281 strbuf_git_path(buf, "%s/%s", "modules", sub->name);
2282 }
2283
2284 cleanup:
2285 return ret;
2286 }
git for Debian