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debian: new upstream point release
[git/debian.git] / submodule.c
blobf27f14e86817607f7d11e376431d1b2864939aab
1 #define NO_THE_INDEX_COMPATIBILITY_MACROS
2
3 #include "cache.h"
4 #include "repository.h"
5 #include "config.h"
6 #include "submodule-config.h"
7 #include "submodule.h"
8 #include "dir.h"
9 #include "diff.h"
10 #include "commit.h"
11 #include "revision.h"
12 #include "run-command.h"
13 #include "diffcore.h"
14 #include "refs.h"
15 #include "string-list.h"
16 #include "sha1-array.h"
17 #include "argv-array.h"
18 #include "blob.h"
19 #include "thread-utils.h"
20 #include "quote.h"
21 #include "remote.h"
22 #include "worktree.h"
23 #include "parse-options.h"
24 #include "object-store.h"
25
26 static int config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
27 static struct string_list changed_submodule_names = STRING_LIST_INIT_DUP;
28 static int initialized_fetch_ref_tips;
29 static struct oid_array ref_tips_before_fetch;
30 static struct oid_array ref_tips_after_fetch;
31
32 /*
33 * Check if the .gitmodules file is unmerged. Parsing of the .gitmodules file
34 * will be disabled because we can't guess what might be configured in
35 * .gitmodules unless the user resolves the conflict.
36 */
37 int is_gitmodules_unmerged(const struct index_state *istate)
38 {
39 int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE));
40 if (pos < 0) { /* .gitmodules not found or isn't merged */
41 pos = -1 - pos;
42 if (istate->cache_nr > pos) { /* there is a .gitmodules */
43 const struct cache_entry *ce = istate->cache[pos];
44 if (ce_namelen(ce) == strlen(GITMODULES_FILE) &&
45 !strcmp(ce->name, GITMODULES_FILE))
46 return 1;
47 }
48 }
49
50 return 0;
51 }
52
53 /*
54 * Check if the .gitmodules file has unstaged modifications. This must be
55 * checked before allowing modifications to the .gitmodules file with the
56 * intention to stage them later, because when continuing we would stage the
57 * modifications the user didn't stage herself too. That might change in a
58 * future version when we learn to stage the changes we do ourselves without
59 * staging any previous modifications.
60 */
61 int is_staging_gitmodules_ok(struct index_state *istate)
62 {
63 int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE));
64
65 if ((pos >= 0) && (pos < istate->cache_nr)) {
66 struct stat st;
67 if (lstat(GITMODULES_FILE, &st) == 0 &&
68 ie_match_stat(istate, istate->cache[pos], &st, 0) & DATA_CHANGED)
69 return 0;
70 }
71
72 return 1;
73 }
74
75 static int for_each_remote_ref_submodule(const char *submodule,
76 each_ref_fn fn, void *cb_data)
77 {
78 return refs_for_each_remote_ref(get_submodule_ref_store(submodule),
79 fn, cb_data);
80 }
81
82 /*
83 * Try to update the "path" entry in the "submodule.<name>" section of the
84 * .gitmodules file. Return 0 only if a .gitmodules file was found, a section
85 * with the correct path=<oldpath> setting was found and we could update it.
86 */
87 int update_path_in_gitmodules(const char *oldpath, const char *newpath)
88 {
89 struct strbuf entry = STRBUF_INIT;
90 const struct submodule *submodule;
91
92 if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
93 return -1;
94
95 if (is_gitmodules_unmerged(the_repository->index))
96 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
97
98 submodule = submodule_from_path(the_repository, &null_oid, oldpath);
99 if (!submodule || !submodule->name) {
100 warning(_("Could not find section in .gitmodules where path=%s"), oldpath);
101 return -1;
102 }
103 strbuf_addstr(&entry, "submodule.");
104 strbuf_addstr(&entry, submodule->name);
105 strbuf_addstr(&entry, ".path");
106 if (git_config_set_in_file_gently(GITMODULES_FILE, entry.buf, newpath) < 0) {
107 /* Maybe the user already did that, don't error out here */
108 warning(_("Could not update .gitmodules entry %s"), entry.buf);
109 strbuf_release(&entry);
110 return -1;
111 }
112 strbuf_release(&entry);
113 return 0;
114 }
115
116 /*
117 * Try to remove the "submodule.<name>" section from .gitmodules where the given
118 * path is configured. Return 0 only if a .gitmodules file was found, a section
119 * with the correct path=<path> setting was found and we could remove it.
120 */
121 int remove_path_from_gitmodules(const char *path)
122 {
123 struct strbuf sect = STRBUF_INIT;
124 const struct submodule *submodule;
125
126 if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
127 return -1;
128
129 if (is_gitmodules_unmerged(the_repository->index))
130 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
131
132 submodule = submodule_from_path(the_repository, &null_oid, path);
133 if (!submodule || !submodule->name) {
134 warning(_("Could not find section in .gitmodules where path=%s"), path);
135 return -1;
136 }
137 strbuf_addstr(&sect, "submodule.");
138 strbuf_addstr(&sect, submodule->name);
139 if (git_config_rename_section_in_file(GITMODULES_FILE, sect.buf, NULL) < 0) {
140 /* Maybe the user already did that, don't error out here */
141 warning(_("Could not remove .gitmodules entry for %s"), path);
142 strbuf_release(&sect);
143 return -1;
144 }
145 strbuf_release(&sect);
146 return 0;
147 }
148
149 void stage_updated_gitmodules(struct index_state *istate)
150 {
151 if (add_file_to_index(istate, GITMODULES_FILE, 0))
152 die(_("staging updated .gitmodules failed"));
153 }
154
155 /* TODO: remove this function, use repo_submodule_init instead. */
156 int add_submodule_odb(const char *path)
157 {
158 struct strbuf objects_directory = STRBUF_INIT;
159 int ret = 0;
160
161 ret = strbuf_git_path_submodule(&objects_directory, path, "objects/");
162 if (ret)
163 goto done;
164 if (!is_directory(objects_directory.buf)) {
165 ret = -1;
166 goto done;
167 }
168 add_to_alternates_memory(objects_directory.buf);
169 done:
170 strbuf_release(&objects_directory);
171 return ret;
172 }
173
174 void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
175 const char *path)
176 {
177 const struct submodule *submodule = submodule_from_path(the_repository,
178 &null_oid, path);
179 if (submodule) {
180 const char *ignore;
181 char *key;
182
183 key = xstrfmt("submodule.%s.ignore", submodule->name);
184 if (repo_config_get_string_const(the_repository, key, &ignore))
185 ignore = submodule->ignore;
186 free(key);
187
188 if (ignore)
189 handle_ignore_submodules_arg(diffopt, ignore);
190 else if (is_gitmodules_unmerged(the_repository->index))
191 diffopt->flags.ignore_submodules = 1;
192 }
193 }
194
195 /* Cheap function that only determines if we're interested in submodules at all */
196 int git_default_submodule_config(const char *var, const char *value, void *cb)
197 {
198 if (!strcmp(var, "submodule.recurse")) {
199 int v = git_config_bool(var, value) ?
200 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
201 config_update_recurse_submodules = v;
202 }
203 return 0;
204 }
205
206 int option_parse_recurse_submodules_worktree_updater(const struct option *opt,
207 const char *arg, int unset)
208 {
209 if (unset) {
210 config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
211 return 0;
212 }
213 if (arg)
214 config_update_recurse_submodules =
215 parse_update_recurse_submodules_arg(opt->long_name,
216 arg);
217 else
218 config_update_recurse_submodules = RECURSE_SUBMODULES_ON;
219
220 return 0;
221 }
222
223 /*
224 * Determine if a submodule has been initialized at a given 'path'
225 */
226 int is_submodule_active(struct repository *repo, const char *path)
227 {
228 int ret = 0;
229 char *key = NULL;
230 char *value = NULL;
231 const struct string_list *sl;
232 const struct submodule *module;
233
234 module = submodule_from_path(repo, &null_oid, path);
235
236 /* early return if there isn't a path->module mapping */
237 if (!module)
238 return 0;
239
240 /* submodule.<name>.active is set */
241 key = xstrfmt("submodule.%s.active", module->name);
242 if (!repo_config_get_bool(repo, key, &ret)) {
243 free(key);
244 return ret;
245 }
246 free(key);
247
248 /* submodule.active is set */
249 sl = repo_config_get_value_multi(repo, "submodule.active");
250 if (sl) {
251 struct pathspec ps;
252 struct argv_array args = ARGV_ARRAY_INIT;
253 const struct string_list_item *item;
254
255 for_each_string_list_item(item, sl) {
256 argv_array_push(&args, item->string);
257 }
258
259 parse_pathspec(&ps, 0, 0, NULL, args.argv);
260 ret = match_pathspec(repo->index, &ps, path, strlen(path), 0, NULL, 1);
261
262 argv_array_clear(&args);
263 clear_pathspec(&ps);
264 return ret;
265 }
266
267 /* fallback to checking if the URL is set */
268 key = xstrfmt("submodule.%s.url", module->name);
269 ret = !repo_config_get_string(repo, key, &value);
270
271 free(value);
272 free(key);
273 return ret;
274 }
275
276 int is_submodule_populated_gently(const char *path, int *return_error_code)
277 {
278 int ret = 0;
279 char *gitdir = xstrfmt("%s/.git", path);
280
281 if (resolve_gitdir_gently(gitdir, return_error_code))
282 ret = 1;
283
284 free(gitdir);
285 return ret;
286 }
287
288 /*
289 * Dies if the provided 'prefix' corresponds to an unpopulated submodule
290 */
291 void die_in_unpopulated_submodule(const struct index_state *istate,
292 const char *prefix)
293 {
294 int i, prefixlen;
295
296 if (!prefix)
297 return;
298
299 prefixlen = strlen(prefix);
300
301 for (i = 0; i < istate->cache_nr; i++) {
302 struct cache_entry *ce = istate->cache[i];
303 int ce_len = ce_namelen(ce);
304
305 if (!S_ISGITLINK(ce->ce_mode))
306 continue;
307 if (prefixlen <= ce_len)
308 continue;
309 if (strncmp(ce->name, prefix, ce_len))
310 continue;
311 if (prefix[ce_len] != '/')
312 continue;
313
314 die(_("in unpopulated submodule '%s'"), ce->name);
315 }
316 }
317
318 /*
319 * Dies if any paths in the provided pathspec descends into a submodule
320 */
321 void die_path_inside_submodule(const struct index_state *istate,
322 const struct pathspec *ps)
323 {
324 int i, j;
325
326 for (i = 0; i < istate->cache_nr; i++) {
327 struct cache_entry *ce = istate->cache[i];
328 int ce_len = ce_namelen(ce);
329
330 if (!S_ISGITLINK(ce->ce_mode))
331 continue;
332
333 for (j = 0; j < ps->nr ; j++) {
334 const struct pathspec_item *item = &ps->items[j];
335
336 if (item->len <= ce_len)
337 continue;
338 if (item->match[ce_len] != '/')
339 continue;
340 if (strncmp(ce->name, item->match, ce_len))
341 continue;
342 if (item->len == ce_len + 1)
343 continue;
344
345 die(_("Pathspec '%s' is in submodule '%.*s'"),
346 item->original, ce_len, ce->name);
347 }
348 }
349 }
350
351 enum submodule_update_type parse_submodule_update_type(const char *value)
352 {
353 if (!strcmp(value, "none"))
354 return SM_UPDATE_NONE;
355 else if (!strcmp(value, "checkout"))
356 return SM_UPDATE_CHECKOUT;
357 else if (!strcmp(value, "rebase"))
358 return SM_UPDATE_REBASE;
359 else if (!strcmp(value, "merge"))
360 return SM_UPDATE_MERGE;
361 else if (*value == '!')
362 return SM_UPDATE_COMMAND;
363 else
364 return SM_UPDATE_UNSPECIFIED;
365 }
366
367 int parse_submodule_update_strategy(const char *value,
368 struct submodule_update_strategy *dst)
369 {
370 enum submodule_update_type type;
371
372 free((void*)dst->command);
373 dst->command = NULL;
374
375 type = parse_submodule_update_type(value);
376 if (type == SM_UPDATE_UNSPECIFIED)
377 return -1;
378
379 dst->type = type;
380 if (type == SM_UPDATE_COMMAND)
381 dst->command = xstrdup(value + 1);
382
383 return 0;
384 }
385
386 const char *submodule_strategy_to_string(const struct submodule_update_strategy *s)
387 {
388 struct strbuf sb = STRBUF_INIT;
389 switch (s->type) {
390 case SM_UPDATE_CHECKOUT:
391 return "checkout";
392 case SM_UPDATE_MERGE:
393 return "merge";
394 case SM_UPDATE_REBASE:
395 return "rebase";
396 case SM_UPDATE_NONE:
397 return "none";
398 case SM_UPDATE_UNSPECIFIED:
399 return NULL;
400 case SM_UPDATE_COMMAND:
401 strbuf_addf(&sb, "!%s", s->command);
402 return strbuf_detach(&sb, NULL);
403 }
404 return NULL;
405 }
406
407 void handle_ignore_submodules_arg(struct diff_options *diffopt,
408 const char *arg)
409 {
410 diffopt->flags.ignore_submodules = 0;
411 diffopt->flags.ignore_untracked_in_submodules = 0;
412 diffopt->flags.ignore_dirty_submodules = 0;
413
414 if (!strcmp(arg, "all"))
415 diffopt->flags.ignore_submodules = 1;
416 else if (!strcmp(arg, "untracked"))
417 diffopt->flags.ignore_untracked_in_submodules = 1;
418 else if (!strcmp(arg, "dirty"))
419 diffopt->flags.ignore_dirty_submodules = 1;
420 else if (strcmp(arg, "none"))
421 die("bad --ignore-submodules argument: %s", arg);
422 }
423
424 static int prepare_submodule_summary(struct rev_info *rev, const char *path,
425 struct commit *left, struct commit *right,
426 struct commit_list *merge_bases)
427 {
428 struct commit_list *list;
429
430 init_revisions(rev, NULL);
431 setup_revisions(0, NULL, rev, NULL);
432 rev->left_right = 1;
433 rev->first_parent_only = 1;
434 left->object.flags |= SYMMETRIC_LEFT;
435 add_pending_object(rev, &left->object, path);
436 add_pending_object(rev, &right->object, path);
437 for (list = merge_bases; list; list = list->next) {
438 list->item->object.flags |= UNINTERESTING;
439 add_pending_object(rev, &list->item->object,
440 oid_to_hex(&list->item->object.oid));
441 }
442 return prepare_revision_walk(rev);
443 }
444
445 static void print_submodule_summary(struct rev_info *rev, struct diff_options *o)
446 {
447 static const char format[] = " %m %s";
448 struct strbuf sb = STRBUF_INIT;
449 struct commit *commit;
450
451 while ((commit = get_revision(rev))) {
452 struct pretty_print_context ctx = {0};
453 ctx.date_mode = rev->date_mode;
454 ctx.output_encoding = get_log_output_encoding();
455 strbuf_setlen(&sb, 0);
456 format_commit_message(commit, format, &sb, &ctx);
457 strbuf_addch(&sb, '\n');
458 if (commit->object.flags & SYMMETRIC_LEFT)
459 diff_emit_submodule_del(o, sb.buf);
460 else
461 diff_emit_submodule_add(o, sb.buf);
462 }
463 strbuf_release(&sb);
464 }
465
466 static void prepare_submodule_repo_env_no_git_dir(struct argv_array *out)
467 {
468 const char * const *var;
469
470 for (var = local_repo_env; *var; var++) {
471 if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
472 argv_array_push(out, *var);
473 }
474 }
475
476 void prepare_submodule_repo_env(struct argv_array *out)
477 {
478 prepare_submodule_repo_env_no_git_dir(out);
479 argv_array_pushf(out, "%s=%s", GIT_DIR_ENVIRONMENT,
480 DEFAULT_GIT_DIR_ENVIRONMENT);
481 }
482
483 /* Helper function to display the submodule header line prior to the full
484 * summary output. If it can locate the submodule objects directory it will
485 * attempt to lookup both the left and right commits and put them into the
486 * left and right pointers.
487 */
488 static void show_submodule_header(struct diff_options *o, const char *path,
489 struct object_id *one, struct object_id *two,
490 unsigned dirty_submodule,
491 struct commit **left, struct commit **right,
492 struct commit_list **merge_bases)
493 {
494 const char *message = NULL;
495 struct strbuf sb = STRBUF_INIT;
496 int fast_forward = 0, fast_backward = 0;
497
498 if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
499 diff_emit_submodule_untracked(o, path);
500
501 if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
502 diff_emit_submodule_modified(o, path);
503
504 if (is_null_oid(one))
505 message = "(new submodule)";
506 else if (is_null_oid(two))
507 message = "(submodule deleted)";
508
509 if (add_submodule_odb(path)) {
510 if (!message)
511 message = "(commits not present)";
512 goto output_header;
513 }
514
515 /*
516 * Attempt to lookup the commit references, and determine if this is
517 * a fast forward or fast backwards update.
518 */
519 *left = lookup_commit_reference(the_repository, one);
520 *right = lookup_commit_reference(the_repository, two);
521
522 /*
523 * Warn about missing commits in the submodule project, but only if
524 * they aren't null.
525 */
526 if ((!is_null_oid(one) && !*left) ||
527 (!is_null_oid(two) && !*right))
528 message = "(commits not present)";
529
530 *merge_bases = get_merge_bases(*left, *right);
531 if (*merge_bases) {
532 if ((*merge_bases)->item == *left)
533 fast_forward = 1;
534 else if ((*merge_bases)->item == *right)
535 fast_backward = 1;
536 }
537
538 if (!oidcmp(one, two)) {
539 strbuf_release(&sb);
540 return;
541 }
542
543 output_header:
544 strbuf_addf(&sb, "Submodule %s ", path);
545 strbuf_add_unique_abbrev(&sb, one, DEFAULT_ABBREV);
546 strbuf_addstr(&sb, (fast_backward || fast_forward) ? ".." : "...");
547 strbuf_add_unique_abbrev(&sb, two, DEFAULT_ABBREV);
548 if (message)
549 strbuf_addf(&sb, " %s\n", message);
550 else
551 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
552 diff_emit_submodule_header(o, sb.buf);
553
554 strbuf_release(&sb);
555 }
556
557 void show_submodule_summary(struct diff_options *o, const char *path,
558 struct object_id *one, struct object_id *two,
559 unsigned dirty_submodule)
560 {
561 struct rev_info rev;
562 struct commit *left = NULL, *right = NULL;
563 struct commit_list *merge_bases = NULL;
564
565 show_submodule_header(o, path, one, two, dirty_submodule,
566 &left, &right, &merge_bases);
567
568 /*
569 * If we don't have both a left and a right pointer, there is no
570 * reason to try and display a summary. The header line should contain
571 * all the information the user needs.
572 */
573 if (!left || !right)
574 goto out;
575
576 /* Treat revision walker failure the same as missing commits */
577 if (prepare_submodule_summary(&rev, path, left, right, merge_bases)) {
578 diff_emit_submodule_error(o, "(revision walker failed)\n");
579 goto out;
580 }
581
582 print_submodule_summary(&rev, o);
583
584 out:
585 if (merge_bases)
586 free_commit_list(merge_bases);
587 clear_commit_marks(left, ~0);
588 clear_commit_marks(right, ~0);
589 }
590
591 void show_submodule_inline_diff(struct diff_options *o, const char *path,
592 struct object_id *one, struct object_id *two,
593 unsigned dirty_submodule)
594 {
595 const struct object_id *old_oid = the_hash_algo->empty_tree, *new_oid = the_hash_algo->empty_tree;
596 struct commit *left = NULL, *right = NULL;
597 struct commit_list *merge_bases = NULL;
598 struct child_process cp = CHILD_PROCESS_INIT;
599 struct strbuf sb = STRBUF_INIT;
600
601 show_submodule_header(o, path, one, two, dirty_submodule,
602 &left, &right, &merge_bases);
603
604 /* We need a valid left and right commit to display a difference */
605 if (!(left || is_null_oid(one)) ||
606 !(right || is_null_oid(two)))
607 goto done;
608
609 if (left)
610 old_oid = one;
611 if (right)
612 new_oid = two;
613
614 cp.git_cmd = 1;
615 cp.dir = path;
616 cp.out = -1;
617 cp.no_stdin = 1;
618
619 /* TODO: other options may need to be passed here. */
620 argv_array_pushl(&cp.args, "diff", "--submodule=diff", NULL);
621 argv_array_pushf(&cp.args, "--color=%s", want_color(o->use_color) ?
622 "always" : "never");
623
624 if (o->flags.reverse_diff) {
625 argv_array_pushf(&cp.args, "--src-prefix=%s%s/",
626 o->b_prefix, path);
627 argv_array_pushf(&cp.args, "--dst-prefix=%s%s/",
628 o->a_prefix, path);
629 } else {
630 argv_array_pushf(&cp.args, "--src-prefix=%s%s/",
631 o->a_prefix, path);
632 argv_array_pushf(&cp.args, "--dst-prefix=%s%s/",
633 o->b_prefix, path);
634 }
635 argv_array_push(&cp.args, oid_to_hex(old_oid));
636 /*
637 * If the submodule has modified content, we will diff against the
638 * work tree, under the assumption that the user has asked for the
639 * diff format and wishes to actually see all differences even if they
640 * haven't yet been committed to the submodule yet.
641 */
642 if (!(dirty_submodule & DIRTY_SUBMODULE_MODIFIED))
643 argv_array_push(&cp.args, oid_to_hex(new_oid));
644
645 prepare_submodule_repo_env(&cp.env_array);
646 if (start_command(&cp))
647 diff_emit_submodule_error(o, "(diff failed)\n");
648
649 while (strbuf_getwholeline_fd(&sb, cp.out, '\n') != EOF)
650 diff_emit_submodule_pipethrough(o, sb.buf, sb.len);
651
652 if (finish_command(&cp))
653 diff_emit_submodule_error(o, "(diff failed)\n");
654
655 done:
656 strbuf_release(&sb);
657 if (merge_bases)
658 free_commit_list(merge_bases);
659 if (left)
660 clear_commit_marks(left, ~0);
661 if (right)
662 clear_commit_marks(right, ~0);
663 }
664
665 int should_update_submodules(void)
666 {
667 return config_update_recurse_submodules == RECURSE_SUBMODULES_ON;
668 }
669
670 const struct submodule *submodule_from_ce(const struct cache_entry *ce)
671 {
672 if (!S_ISGITLINK(ce->ce_mode))
673 return NULL;
674
675 if (!should_update_submodules())
676 return NULL;
677
678 return submodule_from_path(the_repository, &null_oid, ce->name);
679 }
680
681 static struct oid_array *submodule_commits(struct string_list *submodules,
682 const char *name)
683 {
684 struct string_list_item *item;
685
686 item = string_list_insert(submodules, name);
687 if (item->util)
688 return (struct oid_array *) item->util;
689
690 /* NEEDSWORK: should we have oid_array_init()? */
691 item->util = xcalloc(1, sizeof(struct oid_array));
692 return (struct oid_array *) item->util;
693 }
694
695 struct collect_changed_submodules_cb_data {
696 struct string_list *changed;
697 const struct object_id *commit_oid;
698 };
699
700 /*
701 * this would normally be two functions: default_name_from_path() and
702 * path_from_default_name(). Since the default name is the same as
703 * the submodule path we can get away with just one function which only
704 * checks whether there is a submodule in the working directory at that
705 * location.
706 */
707 static const char *default_name_or_path(const char *path_or_name)
708 {
709 int error_code;
710
711 if (!is_submodule_populated_gently(path_or_name, &error_code))
712 return NULL;
713
714 return path_or_name;
715 }
716
717 static void collect_changed_submodules_cb(struct diff_queue_struct *q,
718 struct diff_options *options,
719 void *data)
720 {
721 struct collect_changed_submodules_cb_data *me = data;
722 struct string_list *changed = me->changed;
723 const struct object_id *commit_oid = me->commit_oid;
724 int i;
725
726 for (i = 0; i < q->nr; i++) {
727 struct diff_filepair *p = q->queue[i];
728 struct oid_array *commits;
729 const struct submodule *submodule;
730 const char *name;
731
732 if (!S_ISGITLINK(p->two->mode))
733 continue;
734
735 submodule = submodule_from_path(the_repository,
736 commit_oid, p->two->path);
737 if (submodule)
738 name = submodule->name;
739 else {
740 name = default_name_or_path(p->two->path);
741 /* make sure name does not collide with existing one */
742 if (name)
743 submodule = submodule_from_name(the_repository,
744 commit_oid, name);
745 if (submodule) {
746 warning("Submodule in commit %s at path: "
747 "'%s' collides with a submodule named "
748 "the same. Skipping it.",
749 oid_to_hex(commit_oid), p->two->path);
750 name = NULL;
751 }
752 }
753
754 if (!name)
755 continue;
756
757 commits = submodule_commits(changed, name);
758 oid_array_append(commits, &p->two->oid);
759 }
760 }
761
762 /*
763 * Collect the paths of submodules in 'changed' which have changed based on
764 * the revisions as specified in 'argv'. Each entry in 'changed' will also
765 * have a corresponding 'struct oid_array' (in the 'util' field) which lists
766 * what the submodule pointers were updated to during the change.
767 */
768 static void collect_changed_submodules(struct string_list *changed,
769 struct argv_array *argv)
770 {
771 struct rev_info rev;
772 const struct commit *commit;
773
774 init_revisions(&rev, NULL);
775 setup_revisions(argv->argc, argv->argv, &rev, NULL);
776 if (prepare_revision_walk(&rev))
777 die("revision walk setup failed");
778
779 while ((commit = get_revision(&rev))) {
780 struct rev_info diff_rev;
781 struct collect_changed_submodules_cb_data data;
782 data.changed = changed;
783 data.commit_oid = &commit->object.oid;
784
785 init_revisions(&diff_rev, NULL);
786 diff_rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
787 diff_rev.diffopt.format_callback = collect_changed_submodules_cb;
788 diff_rev.diffopt.format_callback_data = &data;
789 diff_tree_combined_merge(commit, 1, &diff_rev);
790 }
791
792 reset_revision_walk();
793 }
794
795 static void free_submodules_oids(struct string_list *submodules)
796 {
797 struct string_list_item *item;
798 for_each_string_list_item(item, submodules)
799 oid_array_clear((struct oid_array *) item->util);
800 string_list_clear(submodules, 1);
801 }
802
803 static int has_remote(const char *refname, const struct object_id *oid,
804 int flags, void *cb_data)
805 {
806 return 1;
807 }
808
809 static int append_oid_to_argv(const struct object_id *oid, void *data)
810 {
811 struct argv_array *argv = data;
812 argv_array_push(argv, oid_to_hex(oid));
813 return 0;
814 }
815
816 struct has_commit_data {
817 int result;
818 const char *path;
819 };
820
821 static int check_has_commit(const struct object_id *oid, void *data)
822 {
823 struct has_commit_data *cb = data;
824
825 enum object_type type = oid_object_info(the_repository, oid, NULL);
826
827 switch (type) {
828 case OBJ_COMMIT:
829 return 0;
830 case OBJ_BAD:
831 /*
832 * Object is missing or invalid. If invalid, an error message
833 * has already been printed.
834 */
835 cb->result = 0;
836 return 0;
837 default:
838 die(_("submodule entry '%s' (%s) is a %s, not a commit"),
839 cb->path, oid_to_hex(oid), type_name(type));
840 }
841 }
842
843 static int submodule_has_commits(const char *path, struct oid_array *commits)
844 {
845 struct has_commit_data has_commit = { 1, path };
846
847 /*
848 * Perform a cheap, but incorrect check for the existence of 'commits'.
849 * This is done by adding the submodule's object store to the in-core
850 * object store, and then querying for each commit's existence. If we
851 * do not have the commit object anywhere, there is no chance we have
852 * it in the object store of the correct submodule and have it
853 * reachable from a ref, so we can fail early without spawning rev-list
854 * which is expensive.
855 */
856 if (add_submodule_odb(path))
857 return 0;
858
859 oid_array_for_each_unique(commits, check_has_commit, &has_commit);
860
861 if (has_commit.result) {
862 /*
863 * Even if the submodule is checked out and the commit is
864 * present, make sure it exists in the submodule's object store
865 * and that it is reachable from a ref.
866 */
867 struct child_process cp = CHILD_PROCESS_INIT;
868 struct strbuf out = STRBUF_INIT;
869
870 argv_array_pushl(&cp.args, "rev-list", "-n", "1", NULL);
871 oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args);
872 argv_array_pushl(&cp.args, "--not", "--all", NULL);
873
874 prepare_submodule_repo_env(&cp.env_array);
875 cp.git_cmd = 1;
876 cp.no_stdin = 1;
877 cp.dir = path;
878
879 if (capture_command(&cp, &out, GIT_MAX_HEXSZ + 1) || out.len)
880 has_commit.result = 0;
881
882 strbuf_release(&out);
883 }
884
885 return has_commit.result;
886 }
887
888 static int submodule_needs_pushing(const char *path, struct oid_array *commits)
889 {
890 if (!submodule_has_commits(path, commits))
891 /*
892 * NOTE: We do consider it safe to return "no" here. The
893 * correct answer would be "We do not know" instead of
894 * "No push needed", but it is quite hard to change
895 * the submodule pointer without having the submodule
896 * around. If a user did however change the submodules
897 * without having the submodule around, this indicates
898 * an expert who knows what they are doing or a
899 * maintainer integrating work from other people. In
900 * both cases it should be safe to skip this check.
901 */
902 return 0;
903
904 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
905 struct child_process cp = CHILD_PROCESS_INIT;
906 struct strbuf buf = STRBUF_INIT;
907 int needs_pushing = 0;
908
909 argv_array_push(&cp.args, "rev-list");
910 oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args);
911 argv_array_pushl(&cp.args, "--not", "--remotes", "-n", "1" , NULL);
912
913 prepare_submodule_repo_env(&cp.env_array);
914 cp.git_cmd = 1;
915 cp.no_stdin = 1;
916 cp.out = -1;
917 cp.dir = path;
918 if (start_command(&cp))
919 die("Could not run 'git rev-list <commits> --not --remotes -n 1' command in submodule %s",
920 path);
921 if (strbuf_read(&buf, cp.out, 41))
922 needs_pushing = 1;
923 finish_command(&cp);
924 close(cp.out);
925 strbuf_release(&buf);
926 return needs_pushing;
927 }
928
929 return 0;
930 }
931
932 int find_unpushed_submodules(struct oid_array *commits,
933 const char *remotes_name, struct string_list *needs_pushing)
934 {
935 struct string_list submodules = STRING_LIST_INIT_DUP;
936 struct string_list_item *name;
937 struct argv_array argv = ARGV_ARRAY_INIT;
938
939 /* argv.argv[0] will be ignored by setup_revisions */
940 argv_array_push(&argv, "find_unpushed_submodules");
941 oid_array_for_each_unique(commits, append_oid_to_argv, &argv);
942 argv_array_push(&argv, "--not");
943 argv_array_pushf(&argv, "--remotes=%s", remotes_name);
944
945 collect_changed_submodules(&submodules, &argv);
946
947 for_each_string_list_item(name, &submodules) {
948 struct oid_array *commits = name->util;
949 const struct submodule *submodule;
950 const char *path = NULL;
951
952 submodule = submodule_from_name(the_repository, &null_oid, name->string);
953 if (submodule)
954 path = submodule->path;
955 else
956 path = default_name_or_path(name->string);
957
958 if (!path)
959 continue;
960
961 if (submodule_needs_pushing(path, commits))
962 string_list_insert(needs_pushing, path);
963 }
964
965 free_submodules_oids(&submodules);
966 argv_array_clear(&argv);
967
968 return needs_pushing->nr;
969 }
970
971 static int push_submodule(const char *path,
972 const struct remote *remote,
973 const struct refspec *rs,
974 const struct string_list *push_options,
975 int dry_run)
976 {
977 if (add_submodule_odb(path))
978 return 1;
979
980 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
981 struct child_process cp = CHILD_PROCESS_INIT;
982 argv_array_push(&cp.args, "push");
983 if (dry_run)
984 argv_array_push(&cp.args, "--dry-run");
985
986 if (push_options && push_options->nr) {
987 const struct string_list_item *item;
988 for_each_string_list_item(item, push_options)
989 argv_array_pushf(&cp.args, "--push-option=%s",
990 item->string);
991 }
992
993 if (remote->origin != REMOTE_UNCONFIGURED) {
994 int i;
995 argv_array_push(&cp.args, remote->name);
996 for (i = 0; i < rs->raw_nr; i++)
997 argv_array_push(&cp.args, rs->raw[i]);
998 }
999
1000 prepare_submodule_repo_env(&cp.env_array);
1001 cp.git_cmd = 1;
1002 cp.no_stdin = 1;
1003 cp.dir = path;
1004 if (run_command(&cp))
1005 return 0;
1006 close(cp.out);
1007 }
1008
1009 return 1;
1010 }
1011
1012 /*
1013 * Perform a check in the submodule to see if the remote and refspec work.
1014 * Die if the submodule can't be pushed.
1015 */
1016 static void submodule_push_check(const char *path, const char *head,
1017 const struct remote *remote,
1018 const struct refspec *rs)
1019 {
1020 struct child_process cp = CHILD_PROCESS_INIT;
1021 int i;
1022
1023 argv_array_push(&cp.args, "submodule--helper");
1024 argv_array_push(&cp.args, "push-check");
1025 argv_array_push(&cp.args, head);
1026 argv_array_push(&cp.args, remote->name);
1027
1028 for (i = 0; i < rs->raw_nr; i++)
1029 argv_array_push(&cp.args, rs->raw[i]);
1030
1031 prepare_submodule_repo_env(&cp.env_array);
1032 cp.git_cmd = 1;
1033 cp.no_stdin = 1;
1034 cp.no_stdout = 1;
1035 cp.dir = path;
1036
1037 /*
1038 * Simply indicate if 'submodule--helper push-check' failed.
1039 * More detailed error information will be provided by the
1040 * child process.
1041 */
1042 if (run_command(&cp))
1043 die("process for submodule '%s' failed", path);
1044 }
1045
1046 int push_unpushed_submodules(struct oid_array *commits,
1047 const struct remote *remote,
1048 const struct refspec *rs,
1049 const struct string_list *push_options,
1050 int dry_run)
1051 {
1052 int i, ret = 1;
1053 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1054
1055 if (!find_unpushed_submodules(commits, remote->name, &needs_pushing))
1056 return 1;
1057
1058 /*
1059 * Verify that the remote and refspec can be propagated to all
1060 * submodules. This check can be skipped if the remote and refspec
1061 * won't be propagated due to the remote being unconfigured (e.g. a URL
1062 * instead of a remote name).
1063 */
1064 if (remote->origin != REMOTE_UNCONFIGURED) {
1065 char *head;
1066 struct object_id head_oid;
1067
1068 head = resolve_refdup("HEAD", 0, &head_oid, NULL);
1069 if (!head)
1070 die(_("Failed to resolve HEAD as a valid ref."));
1071
1072 for (i = 0; i < needs_pushing.nr; i++)
1073 submodule_push_check(needs_pushing.items[i].string,
1074 head, remote, rs);
1075 free(head);
1076 }
1077
1078 /* Actually push the submodules */
1079 for (i = 0; i < needs_pushing.nr; i++) {
1080 const char *path = needs_pushing.items[i].string;
1081 fprintf(stderr, "Pushing submodule '%s'\n", path);
1082 if (!push_submodule(path, remote, rs,
1083 push_options, dry_run)) {
1084 fprintf(stderr, "Unable to push submodule '%s'\n", path);
1085 ret = 0;
1086 }
1087 }
1088
1089 string_list_clear(&needs_pushing, 0);
1090
1091 return ret;
1092 }
1093
1094 static int append_oid_to_array(const char *ref, const struct object_id *oid,
1095 int flags, void *data)
1096 {
1097 struct oid_array *array = data;
1098 oid_array_append(array, oid);
1099 return 0;
1100 }
1101
1102 void check_for_new_submodule_commits(struct object_id *oid)
1103 {
1104 if (!initialized_fetch_ref_tips) {
1105 for_each_ref(append_oid_to_array, &ref_tips_before_fetch);
1106 initialized_fetch_ref_tips = 1;
1107 }
1108
1109 oid_array_append(&ref_tips_after_fetch, oid);
1110 }
1111
1112 static void calculate_changed_submodule_paths(void)
1113 {
1114 struct argv_array argv = ARGV_ARRAY_INIT;
1115 struct string_list changed_submodules = STRING_LIST_INIT_DUP;
1116 const struct string_list_item *name;
1117
1118 /* No need to check if there are no submodules configured */
1119 if (!submodule_from_path(the_repository, NULL, NULL))
1120 return;
1121
1122 argv_array_push(&argv, "--"); /* argv[0] program name */
1123 oid_array_for_each_unique(&ref_tips_after_fetch,
1124 append_oid_to_argv, &argv);
1125 argv_array_push(&argv, "--not");
1126 oid_array_for_each_unique(&ref_tips_before_fetch,
1127 append_oid_to_argv, &argv);
1128
1129 /*
1130 * Collect all submodules (whether checked out or not) for which new
1131 * commits have been recorded upstream in "changed_submodule_names".
1132 */
1133 collect_changed_submodules(&changed_submodules, &argv);
1134
1135 for_each_string_list_item(name, &changed_submodules) {
1136 struct oid_array *commits = name->util;
1137 const struct submodule *submodule;
1138 const char *path = NULL;
1139
1140 submodule = submodule_from_name(the_repository, &null_oid, name->string);
1141 if (submodule)
1142 path = submodule->path;
1143 else
1144 path = default_name_or_path(name->string);
1145
1146 if (!path)
1147 continue;
1148
1149 if (!submodule_has_commits(path, commits))
1150 string_list_append(&changed_submodule_names, name->string);
1151 }
1152
1153 free_submodules_oids(&changed_submodules);
1154 argv_array_clear(&argv);
1155 oid_array_clear(&ref_tips_before_fetch);
1156 oid_array_clear(&ref_tips_after_fetch);
1157 initialized_fetch_ref_tips = 0;
1158 }
1159
1160 int submodule_touches_in_range(struct object_id *excl_oid,
1161 struct object_id *incl_oid)
1162 {
1163 struct string_list subs = STRING_LIST_INIT_DUP;
1164 struct argv_array args = ARGV_ARRAY_INIT;
1165 int ret;
1166
1167 /* No need to check if there are no submodules configured */
1168 if (!submodule_from_path(the_repository, NULL, NULL))
1169 return 0;
1170
1171 argv_array_push(&args, "--"); /* args[0] program name */
1172 argv_array_push(&args, oid_to_hex(incl_oid));
1173 if (!is_null_oid(excl_oid)) {
1174 argv_array_push(&args, "--not");
1175 argv_array_push(&args, oid_to_hex(excl_oid));
1176 }
1177
1178 collect_changed_submodules(&subs, &args);
1179 ret = subs.nr;
1180
1181 argv_array_clear(&args);
1182
1183 free_submodules_oids(&subs);
1184 return ret;
1185 }
1186
1187 struct submodule_parallel_fetch {
1188 int count;
1189 struct argv_array args;
1190 struct repository *r;
1191 const char *prefix;
1192 int command_line_option;
1193 int default_option;
1194 int quiet;
1195 int result;
1196 };
1197 #define SPF_INIT {0, ARGV_ARRAY_INIT, NULL, NULL, 0, 0, 0, 0}
1198
1199 static int get_fetch_recurse_config(const struct submodule *submodule,
1200 struct submodule_parallel_fetch *spf)
1201 {
1202 if (spf->command_line_option != RECURSE_SUBMODULES_DEFAULT)
1203 return spf->command_line_option;
1204
1205 if (submodule) {
1206 char *key;
1207 const char *value;
1208
1209 int fetch_recurse = submodule->fetch_recurse;
1210 key = xstrfmt("submodule.%s.fetchRecurseSubmodules", submodule->name);
1211 if (!repo_config_get_string_const(spf->r, key, &value)) {
1212 fetch_recurse = parse_fetch_recurse_submodules_arg(key, value);
1213 }
1214 free(key);
1215
1216 if (fetch_recurse != RECURSE_SUBMODULES_NONE)
1217 /* local config overrules everything except commandline */
1218 return fetch_recurse;
1219 }
1220
1221 return spf->default_option;
1222 }
1223
1224 static int get_next_submodule(struct child_process *cp,
1225 struct strbuf *err, void *data, void **task_cb)
1226 {
1227 int ret = 0;
1228 struct submodule_parallel_fetch *spf = data;
1229
1230 for (; spf->count < spf->r->index->cache_nr; spf->count++) {
1231 struct strbuf submodule_path = STRBUF_INIT;
1232 struct strbuf submodule_git_dir = STRBUF_INIT;
1233 struct strbuf submodule_prefix = STRBUF_INIT;
1234 const struct cache_entry *ce = spf->r->index->cache[spf->count];
1235 const char *git_dir, *default_argv;
1236 const struct submodule *submodule;
1237 struct submodule default_submodule = SUBMODULE_INIT;
1238
1239 if (!S_ISGITLINK(ce->ce_mode))
1240 continue;
1241
1242 submodule = submodule_from_path(spf->r, &null_oid, ce->name);
1243 if (!submodule) {
1244 const char *name = default_name_or_path(ce->name);
1245 if (name) {
1246 default_submodule.path = default_submodule.name = name;
1247 submodule = &default_submodule;
1248 }
1249 }
1250
1251 switch (get_fetch_recurse_config(submodule, spf))
1252 {
1253 default:
1254 case RECURSE_SUBMODULES_DEFAULT:
1255 case RECURSE_SUBMODULES_ON_DEMAND:
1256 if (!submodule || !unsorted_string_list_lookup(&changed_submodule_names,
1257 submodule->name))
1258 continue;
1259 default_argv = "on-demand";
1260 break;
1261 case RECURSE_SUBMODULES_ON:
1262 default_argv = "yes";
1263 break;
1264 case RECURSE_SUBMODULES_OFF:
1265 continue;
1266 }
1267
1268 strbuf_repo_worktree_path(&submodule_path, spf->r, "%s", ce->name);
1269 strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
1270 strbuf_addf(&submodule_prefix, "%s%s/", spf->prefix, ce->name);
1271 git_dir = read_gitfile(submodule_git_dir.buf);
1272 if (!git_dir)
1273 git_dir = submodule_git_dir.buf;
1274 if (is_directory(git_dir)) {
1275 child_process_init(cp);
1276 cp->dir = strbuf_detach(&submodule_path, NULL);
1277 prepare_submodule_repo_env(&cp->env_array);
1278 cp->git_cmd = 1;
1279 if (!spf->quiet)
1280 strbuf_addf(err, "Fetching submodule %s%s\n",
1281 spf->prefix, ce->name);
1282 argv_array_init(&cp->args);
1283 argv_array_pushv(&cp->args, spf->args.argv);
1284 argv_array_push(&cp->args, default_argv);
1285 argv_array_push(&cp->args, "--submodule-prefix");
1286 argv_array_push(&cp->args, submodule_prefix.buf);
1287 ret = 1;
1288 }
1289 strbuf_release(&submodule_path);
1290 strbuf_release(&submodule_git_dir);
1291 strbuf_release(&submodule_prefix);
1292 if (ret) {
1293 spf->count++;
1294 return 1;
1295 }
1296 }
1297 return 0;
1298 }
1299
1300 static int fetch_start_failure(struct strbuf *err,
1301 void *cb, void *task_cb)
1302 {
1303 struct submodule_parallel_fetch *spf = cb;
1304
1305 spf->result = 1;
1306
1307 return 0;
1308 }
1309
1310 static int fetch_finish(int retvalue, struct strbuf *err,
1311 void *cb, void *task_cb)
1312 {
1313 struct submodule_parallel_fetch *spf = cb;
1314
1315 if (retvalue)
1316 spf->result = 1;
1317
1318 return 0;
1319 }
1320
1321 int fetch_populated_submodules(struct repository *r,
1322 const struct argv_array *options,
1323 const char *prefix, int command_line_option,
1324 int default_option,
1325 int quiet, int max_parallel_jobs)
1326 {
1327 int i;
1328 struct submodule_parallel_fetch spf = SPF_INIT;
1329
1330 spf.r = r;
1331 spf.command_line_option = command_line_option;
1332 spf.default_option = default_option;
1333 spf.quiet = quiet;
1334 spf.prefix = prefix;
1335
1336 if (!r->worktree)
1337 goto out;
1338
1339 if (repo_read_index(r) < 0)
1340 die("index file corrupt");
1341
1342 argv_array_push(&spf.args, "fetch");
1343 for (i = 0; i < options->argc; i++)
1344 argv_array_push(&spf.args, options->argv[i]);
1345 argv_array_push(&spf.args, "--recurse-submodules-default");
1346 /* default value, "--submodule-prefix" and its value are added later */
1347
1348 calculate_changed_submodule_paths();
1349 run_processes_parallel(max_parallel_jobs,
1350 get_next_submodule,
1351 fetch_start_failure,
1352 fetch_finish,
1353 &spf);
1354
1355 argv_array_clear(&spf.args);
1356 out:
1357 string_list_clear(&changed_submodule_names, 1);
1358 return spf.result;
1359 }
1360
1361 unsigned is_submodule_modified(const char *path, int ignore_untracked)
1362 {
1363 struct child_process cp = CHILD_PROCESS_INIT;
1364 struct strbuf buf = STRBUF_INIT;
1365 FILE *fp;
1366 unsigned dirty_submodule = 0;
1367 const char *git_dir;
1368 int ignore_cp_exit_code = 0;
1369
1370 strbuf_addf(&buf, "%s/.git", path);
1371 git_dir = read_gitfile(buf.buf);
1372 if (!git_dir)
1373 git_dir = buf.buf;
1374 if (!is_git_directory(git_dir)) {
1375 if (is_directory(git_dir))
1376 die(_("'%s' not recognized as a git repository"), git_dir);
1377 strbuf_release(&buf);
1378 /* The submodule is not checked out, so it is not modified */
1379 return 0;
1380 }
1381 strbuf_reset(&buf);
1382
1383 argv_array_pushl(&cp.args, "status", "--porcelain=2", NULL);
1384 if (ignore_untracked)
1385 argv_array_push(&cp.args, "-uno");
1386
1387 prepare_submodule_repo_env(&cp.env_array);
1388 cp.git_cmd = 1;
1389 cp.no_stdin = 1;
1390 cp.out = -1;
1391 cp.dir = path;
1392 if (start_command(&cp))
1393 die("Could not run 'git status --porcelain=2' in submodule %s", path);
1394
1395 fp = xfdopen(cp.out, "r");
1396 while (strbuf_getwholeline(&buf, fp, '\n') != EOF) {
1397 /* regular untracked files */
1398 if (buf.buf[0] == '?')
1399 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
1400
1401 if (buf.buf[0] == 'u' ||
1402 buf.buf[0] == '1' ||
1403 buf.buf[0] == '2') {
1404 /* T = line type, XY = status, SSSS = submodule state */
1405 if (buf.len < strlen("T XY SSSS"))
1406 BUG("invalid status --porcelain=2 line %s",
1407 buf.buf);
1408
1409 if (buf.buf[5] == 'S' && buf.buf[8] == 'U')
1410 /* nested untracked file */
1411 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
1412
1413 if (buf.buf[0] == 'u' ||
1414 buf.buf[0] == '2' ||
1415 memcmp(buf.buf + 5, "S..U", 4))
1416 /* other change */
1417 dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
1418 }
1419
1420 if ((dirty_submodule & DIRTY_SUBMODULE_MODIFIED) &&
1421 ((dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ||
1422 ignore_untracked)) {
1423 /*
1424 * We're not interested in any further information from
1425 * the child any more, neither output nor its exit code.
1426 */
1427 ignore_cp_exit_code = 1;
1428 break;
1429 }
1430 }
1431 fclose(fp);
1432
1433 if (finish_command(&cp) && !ignore_cp_exit_code)
1434 die("'git status --porcelain=2' failed in submodule %s", path);
1435
1436 strbuf_release(&buf);
1437 return dirty_submodule;
1438 }
1439
1440 int submodule_uses_gitfile(const char *path)
1441 {
1442 struct child_process cp = CHILD_PROCESS_INIT;
1443 const char *argv[] = {
1444 "submodule",
1445 "foreach",
1446 "--quiet",
1447 "--recursive",
1448 "test -f .git",
1449 NULL,
1450 };
1451 struct strbuf buf = STRBUF_INIT;
1452 const char *git_dir;
1453
1454 strbuf_addf(&buf, "%s/.git", path);
1455 git_dir = read_gitfile(buf.buf);
1456 if (!git_dir) {
1457 strbuf_release(&buf);
1458 return 0;
1459 }
1460 strbuf_release(&buf);
1461
1462 /* Now test that all nested submodules use a gitfile too */
1463 cp.argv = argv;
1464 prepare_submodule_repo_env(&cp.env_array);
1465 cp.git_cmd = 1;
1466 cp.no_stdin = 1;
1467 cp.no_stderr = 1;
1468 cp.no_stdout = 1;
1469 cp.dir = path;
1470 if (run_command(&cp))
1471 return 0;
1472
1473 return 1;
1474 }
1475
1476 /*
1477 * Check if it is a bad idea to remove a submodule, i.e. if we'd lose data
1478 * when doing so.
1479 *
1480 * Return 1 if we'd lose data, return 0 if the removal is fine,
1481 * and negative values for errors.
1482 */
1483 int bad_to_remove_submodule(const char *path, unsigned flags)
1484 {
1485 ssize_t len;
1486 struct child_process cp = CHILD_PROCESS_INIT;
1487 struct strbuf buf = STRBUF_INIT;
1488 int ret = 0;
1489
1490 if (!file_exists(path) || is_empty_dir(path))
1491 return 0;
1492
1493 if (!submodule_uses_gitfile(path))
1494 return 1;
1495
1496 argv_array_pushl(&cp.args, "status", "--porcelain",
1497 "--ignore-submodules=none", NULL);
1498
1499 if (flags & SUBMODULE_REMOVAL_IGNORE_UNTRACKED)
1500 argv_array_push(&cp.args, "-uno");
1501 else
1502 argv_array_push(&cp.args, "-uall");
1503
1504 if (!(flags & SUBMODULE_REMOVAL_IGNORE_IGNORED_UNTRACKED))
1505 argv_array_push(&cp.args, "--ignored");
1506
1507 prepare_submodule_repo_env(&cp.env_array);
1508 cp.git_cmd = 1;
1509 cp.no_stdin = 1;
1510 cp.out = -1;
1511 cp.dir = path;
1512 if (start_command(&cp)) {
1513 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
1514 die(_("could not start 'git status' in submodule '%s'"),
1515 path);
1516 ret = -1;
1517 goto out;
1518 }
1519
1520 len = strbuf_read(&buf, cp.out, 1024);
1521 if (len > 2)
1522 ret = 1;
1523 close(cp.out);
1524
1525 if (finish_command(&cp)) {
1526 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
1527 die(_("could not run 'git status' in submodule '%s'"),
1528 path);
1529 ret = -1;
1530 }
1531 out:
1532 strbuf_release(&buf);
1533 return ret;
1534 }
1535
1536 static const char *get_super_prefix_or_empty(void)
1537 {
1538 const char *s = get_super_prefix();
1539 if (!s)
1540 s = "";
1541 return s;
1542 }
1543
1544 static int submodule_has_dirty_index(const struct submodule *sub)
1545 {
1546 struct child_process cp = CHILD_PROCESS_INIT;
1547
1548 prepare_submodule_repo_env(&cp.env_array);
1549
1550 cp.git_cmd = 1;
1551 argv_array_pushl(&cp.args, "diff-index", "--quiet",
1552 "--cached", "HEAD", NULL);
1553 cp.no_stdin = 1;
1554 cp.no_stdout = 1;
1555 cp.dir = sub->path;
1556 if (start_command(&cp))
1557 die("could not recurse into submodule '%s'", sub->path);
1558
1559 return finish_command(&cp);
1560 }
1561
1562 static void submodule_reset_index(const char *path)
1563 {
1564 struct child_process cp = CHILD_PROCESS_INIT;
1565 prepare_submodule_repo_env(&cp.env_array);
1566
1567 cp.git_cmd = 1;
1568 cp.no_stdin = 1;
1569 cp.dir = path;
1570
1571 argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
1572 get_super_prefix_or_empty(), path);
1573 argv_array_pushl(&cp.args, "read-tree", "-u", "--reset", NULL);
1574
1575 argv_array_push(&cp.args, empty_tree_oid_hex());
1576
1577 if (run_command(&cp))
1578 die("could not reset submodule index");
1579 }
1580
1581 /**
1582 * Moves a submodule at a given path from a given head to another new head.
1583 * For edge cases (a submodule coming into existence or removing a submodule)
1584 * pass NULL for old or new respectively.
1585 */
1586 int submodule_move_head(const char *path,
1587 const char *old_head,
1588 const char *new_head,
1589 unsigned flags)
1590 {
1591 int ret = 0;
1592 struct child_process cp = CHILD_PROCESS_INIT;
1593 const struct submodule *sub;
1594 int *error_code_ptr, error_code;
1595
1596 if (!is_submodule_active(the_repository, path))
1597 return 0;
1598
1599 if (flags & SUBMODULE_MOVE_HEAD_FORCE)
1600 /*
1601 * Pass non NULL pointer to is_submodule_populated_gently
1602 * to prevent die()-ing. We'll use connect_work_tree_and_git_dir
1603 * to fixup the submodule in the force case later.
1604 */
1605 error_code_ptr = &error_code;
1606 else
1607 error_code_ptr = NULL;
1608
1609 if (old_head && !is_submodule_populated_gently(path, error_code_ptr))
1610 return 0;
1611
1612 sub = submodule_from_path(the_repository, &null_oid, path);
1613
1614 if (!sub)
1615 BUG("could not get submodule information for '%s'", path);
1616
1617 if (old_head && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) {
1618 /* Check if the submodule has a dirty index. */
1619 if (submodule_has_dirty_index(sub))
1620 return error(_("submodule '%s' has dirty index"), path);
1621 }
1622
1623 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1624 if (old_head) {
1625 if (!submodule_uses_gitfile(path))
1626 absorb_git_dir_into_superproject("", path,
1627 ABSORB_GITDIR_RECURSE_SUBMODULES);
1628 } else {
1629 char *gitdir = xstrfmt("%s/modules/%s",
1630 get_git_common_dir(), sub->name);
1631 connect_work_tree_and_git_dir(path, gitdir, 0);
1632 free(gitdir);
1633
1634 /* make sure the index is clean as well */
1635 submodule_reset_index(path);
1636 }
1637
1638 if (old_head && (flags & SUBMODULE_MOVE_HEAD_FORCE)) {
1639 char *gitdir = xstrfmt("%s/modules/%s",
1640 get_git_common_dir(), sub->name);
1641 connect_work_tree_and_git_dir(path, gitdir, 1);
1642 free(gitdir);
1643 }
1644 }
1645
1646 prepare_submodule_repo_env(&cp.env_array);
1647
1648 cp.git_cmd = 1;
1649 cp.no_stdin = 1;
1650 cp.dir = path;
1651
1652 argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
1653 get_super_prefix_or_empty(), path);
1654 argv_array_pushl(&cp.args, "read-tree", "--recurse-submodules", NULL);
1655
1656 if (flags & SUBMODULE_MOVE_HEAD_DRY_RUN)
1657 argv_array_push(&cp.args, "-n");
1658 else
1659 argv_array_push(&cp.args, "-u");
1660
1661 if (flags & SUBMODULE_MOVE_HEAD_FORCE)
1662 argv_array_push(&cp.args, "--reset");
1663 else
1664 argv_array_push(&cp.args, "-m");
1665
1666 if (!(flags & SUBMODULE_MOVE_HEAD_FORCE))
1667 argv_array_push(&cp.args, old_head ? old_head : empty_tree_oid_hex());
1668
1669 argv_array_push(&cp.args, new_head ? new_head : empty_tree_oid_hex());
1670
1671 if (run_command(&cp)) {
1672 ret = error(_("Submodule '%s' could not be updated."), path);
1673 goto out;
1674 }
1675
1676 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1677 if (new_head) {
1678 child_process_init(&cp);
1679 /* also set the HEAD accordingly */
1680 cp.git_cmd = 1;
1681 cp.no_stdin = 1;
1682 cp.dir = path;
1683
1684 prepare_submodule_repo_env(&cp.env_array);
1685 argv_array_pushl(&cp.args, "update-ref", "HEAD",
1686 "--no-deref", new_head, NULL);
1687
1688 if (run_command(&cp)) {
1689 ret = -1;
1690 goto out;
1691 }
1692 } else {
1693 struct strbuf sb = STRBUF_INIT;
1694
1695 strbuf_addf(&sb, "%s/.git", path);
1696 unlink_or_warn(sb.buf);
1697 strbuf_release(&sb);
1698
1699 if (is_empty_dir(path))
1700 rmdir_or_warn(path);
1701 }
1702 }
1703 out:
1704 return ret;
1705 }
1706
1707 /*
1708 * Embeds a single submodules git directory into the superprojects git dir,
1709 * non recursively.
1710 */
1711 static void relocate_single_git_dir_into_superproject(const char *prefix,
1712 const char *path)
1713 {
1714 char *old_git_dir = NULL, *real_old_git_dir = NULL, *real_new_git_dir = NULL;
1715 const char *new_git_dir;
1716 const struct submodule *sub;
1717
1718 if (submodule_uses_worktrees(path))
1719 die(_("relocate_gitdir for submodule '%s' with "
1720 "more than one worktree not supported"), path);
1721
1722 old_git_dir = xstrfmt("%s/.git", path);
1723 if (read_gitfile(old_git_dir))
1724 /* If it is an actual gitfile, it doesn't need migration. */
1725 return;
1726
1727 real_old_git_dir = real_pathdup(old_git_dir, 1);
1728
1729 sub = submodule_from_path(the_repository, &null_oid, path);
1730 if (!sub)
1731 die(_("could not lookup name for submodule '%s'"), path);
1732
1733 new_git_dir = git_path("modules/%s", sub->name);
1734 if (safe_create_leading_directories_const(new_git_dir) < 0)
1735 die(_("could not create directory '%s'"), new_git_dir);
1736 real_new_git_dir = real_pathdup(new_git_dir, 1);
1737
1738 fprintf(stderr, _("Migrating git directory of '%s%s' from\n'%s' to\n'%s'\n"),
1739 get_super_prefix_or_empty(), path,
1740 real_old_git_dir, real_new_git_dir);
1741
1742 relocate_gitdir(path, real_old_git_dir, real_new_git_dir);
1743
1744 free(old_git_dir);
1745 free(real_old_git_dir);
1746 free(real_new_git_dir);
1747 }
1748
1749 /*
1750 * Migrate the git directory of the submodule given by path from
1751 * having its git directory within the working tree to the git dir nested
1752 * in its superprojects git dir under modules/.
1753 */
1754 void absorb_git_dir_into_superproject(const char *prefix,
1755 const char *path,
1756 unsigned flags)
1757 {
1758 int err_code;
1759 const char *sub_git_dir;
1760 struct strbuf gitdir = STRBUF_INIT;
1761 strbuf_addf(&gitdir, "%s/.git", path);
1762 sub_git_dir = resolve_gitdir_gently(gitdir.buf, &err_code);
1763
1764 /* Not populated? */
1765 if (!sub_git_dir) {
1766 const struct submodule *sub;
1767
1768 if (err_code == READ_GITFILE_ERR_STAT_FAILED) {
1769 /* unpopulated as expected */
1770 strbuf_release(&gitdir);
1771 return;
1772 }
1773
1774 if (err_code != READ_GITFILE_ERR_NOT_A_REPO)
1775 /* We don't know what broke here. */
1776 read_gitfile_error_die(err_code, path, NULL);
1777
1778 /*
1779 * Maybe populated, but no git directory was found?
1780 * This can happen if the superproject is a submodule
1781 * itself and was just absorbed. The absorption of the
1782 * superproject did not rewrite the git file links yet,
1783 * fix it now.
1784 */
1785 sub = submodule_from_path(the_repository, &null_oid, path);
1786 if (!sub)
1787 die(_("could not lookup name for submodule '%s'"), path);
1788 connect_work_tree_and_git_dir(path,
1789 git_path("modules/%s", sub->name), 0);
1790 } else {
1791 /* Is it already absorbed into the superprojects git dir? */
1792 char *real_sub_git_dir = real_pathdup(sub_git_dir, 1);
1793 char *real_common_git_dir = real_pathdup(get_git_common_dir(), 1);
1794
1795 if (!starts_with(real_sub_git_dir, real_common_git_dir))
1796 relocate_single_git_dir_into_superproject(prefix, path);
1797
1798 free(real_sub_git_dir);
1799 free(real_common_git_dir);
1800 }
1801 strbuf_release(&gitdir);
1802
1803 if (flags & ABSORB_GITDIR_RECURSE_SUBMODULES) {
1804 struct child_process cp = CHILD_PROCESS_INIT;
1805 struct strbuf sb = STRBUF_INIT;
1806
1807 if (flags & ~ABSORB_GITDIR_RECURSE_SUBMODULES)
1808 BUG("we don't know how to pass the flags down?");
1809
1810 strbuf_addstr(&sb, get_super_prefix_or_empty());
1811 strbuf_addstr(&sb, path);
1812 strbuf_addch(&sb, '/');
1813
1814 cp.dir = path;
1815 cp.git_cmd = 1;
1816 cp.no_stdin = 1;
1817 argv_array_pushl(&cp.args, "--super-prefix", sb.buf,
1818 "submodule--helper",
1819 "absorb-git-dirs", NULL);
1820 prepare_submodule_repo_env(&cp.env_array);
1821 if (run_command(&cp))
1822 die(_("could not recurse into submodule '%s'"), path);
1823
1824 strbuf_release(&sb);
1825 }
1826 }
1827
1828 const char *get_superproject_working_tree(void)
1829 {
1830 struct child_process cp = CHILD_PROCESS_INIT;
1831 struct strbuf sb = STRBUF_INIT;
1832 const char *one_up = real_path_if_valid("../");
1833 const char *cwd = xgetcwd();
1834 const char *ret = NULL;
1835 const char *subpath;
1836 int code;
1837 ssize_t len;
1838
1839 if (!is_inside_work_tree())
1840 /*
1841 * FIXME:
1842 * We might have a superproject, but it is harder
1843 * to determine.
1844 */
1845 return NULL;
1846
1847 if (!one_up)
1848 return NULL;
1849
1850 subpath = relative_path(cwd, one_up, &sb);
1851
1852 prepare_submodule_repo_env(&cp.env_array);
1853 argv_array_pop(&cp.env_array);
1854
1855 argv_array_pushl(&cp.args, "--literal-pathspecs", "-C", "..",
1856 "ls-files", "-z", "--stage", "--full-name", "--",
1857 subpath, NULL);
1858 strbuf_reset(&sb);
1859
1860 cp.no_stdin = 1;
1861 cp.no_stderr = 1;
1862 cp.out = -1;
1863 cp.git_cmd = 1;
1864
1865 if (start_command(&cp))
1866 die(_("could not start ls-files in .."));
1867
1868 len = strbuf_read(&sb, cp.out, PATH_MAX);
1869 close(cp.out);
1870
1871 if (starts_with(sb.buf, "160000")) {
1872 int super_sub_len;
1873 int cwd_len = strlen(cwd);
1874 char *super_sub, *super_wt;
1875
1876 /*
1877 * There is a superproject having this repo as a submodule.
1878 * The format is <mode> SP <hash> SP <stage> TAB <full name> \0,
1879 * We're only interested in the name after the tab.
1880 */
1881 super_sub = strchr(sb.buf, '\t') + 1;
1882 super_sub_len = strlen(super_sub);
1883
1884 if (super_sub_len > cwd_len ||
1885 strcmp(&cwd[cwd_len - super_sub_len], super_sub))
1886 BUG("returned path string doesn't match cwd?");
1887
1888 super_wt = xstrdup(cwd);
1889 super_wt[cwd_len - super_sub_len] = '\0';
1890
1891 ret = real_path(super_wt);
1892 free(super_wt);
1893 }
1894 strbuf_release(&sb);
1895
1896 code = finish_command(&cp);
1897
1898 if (code == 128)
1899 /* '../' is not a git repository */
1900 return NULL;
1901 if (code == 0 && len == 0)
1902 /* There is an unrelated git repository at '../' */
1903 return NULL;
1904 if (code)
1905 die(_("ls-tree returned unexpected return code %d"), code);
1906
1907 return ret;
1908 }
1909
1910 /*
1911 * Put the gitdir for a submodule (given relative to the main
1912 * repository worktree) into `buf`, or return -1 on error.
1913 */
1914 int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
1915 {
1916 const struct submodule *sub;
1917 const char *git_dir;
1918 int ret = 0;
1919
1920 strbuf_reset(buf);
1921 strbuf_addstr(buf, submodule);
1922 strbuf_complete(buf, '/');
1923 strbuf_addstr(buf, ".git");
1924
1925 git_dir = read_gitfile(buf->buf);
1926 if (git_dir) {
1927 strbuf_reset(buf);
1928 strbuf_addstr(buf, git_dir);
1929 }
1930 if (!is_git_directory(buf->buf)) {
1931 sub = submodule_from_path(the_repository, &null_oid, submodule);
1932 if (!sub) {
1933 ret = -1;
1934 goto cleanup;
1935 }
1936 strbuf_reset(buf);
1937 strbuf_git_path(buf, "%s/%s", "modules", sub->name);
1938 }
1939
1940 cleanup:
1941 return ret;
1942 }
git for Debian