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add a script to diff rendered documentation
[git/debian.git] / submodule.c
blob6e14547e9e0000e6bf80e9ad21da81795cebcab7
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,
69 CE_MATCH_IGNORE_FSMONITOR) & DATA_CHANGED)
70 return 0;
71 }
72
73 return 1;
74 }
75
76 static int for_each_remote_ref_submodule(const char *submodule,
77 each_ref_fn fn, void *cb_data)
78 {
79 return refs_for_each_remote_ref(get_submodule_ref_store(submodule),
80 fn, cb_data);
81 }
82
83 /*
84 * Try to update the "path" entry in the "submodule.<name>" section of the
85 * .gitmodules file. Return 0 only if a .gitmodules file was found, a section
86 * with the correct path=<oldpath> setting was found and we could update it.
87 */
88 int update_path_in_gitmodules(const char *oldpath, const char *newpath)
89 {
90 struct strbuf entry = STRBUF_INIT;
91 const struct submodule *submodule;
92
93 if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
94 return -1;
95
96 if (is_gitmodules_unmerged(&the_index))
97 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
98
99 submodule = submodule_from_path(the_repository, &null_oid, oldpath);
100 if (!submodule || !submodule->name) {
101 warning(_("Could not find section in .gitmodules where path=%s"), oldpath);
102 return -1;
103 }
104 strbuf_addstr(&entry, "submodule.");
105 strbuf_addstr(&entry, submodule->name);
106 strbuf_addstr(&entry, ".path");
107 if (git_config_set_in_file_gently(GITMODULES_FILE, entry.buf, newpath) < 0) {
108 /* Maybe the user already did that, don't error out here */
109 warning(_("Could not update .gitmodules entry %s"), entry.buf);
110 strbuf_release(&entry);
111 return -1;
112 }
113 strbuf_release(&entry);
114 return 0;
115 }
116
117 /*
118 * Try to remove the "submodule.<name>" section from .gitmodules where the given
119 * path is configured. Return 0 only if a .gitmodules file was found, a section
120 * with the correct path=<path> setting was found and we could remove it.
121 */
122 int remove_path_from_gitmodules(const char *path)
123 {
124 struct strbuf sect = STRBUF_INIT;
125 const struct submodule *submodule;
126
127 if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
128 return -1;
129
130 if (is_gitmodules_unmerged(&the_index))
131 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
132
133 submodule = submodule_from_path(the_repository, &null_oid, path);
134 if (!submodule || !submodule->name) {
135 warning(_("Could not find section in .gitmodules where path=%s"), path);
136 return -1;
137 }
138 strbuf_addstr(&sect, "submodule.");
139 strbuf_addstr(&sect, submodule->name);
140 if (git_config_rename_section_in_file(GITMODULES_FILE, sect.buf, NULL) < 0) {
141 /* Maybe the user already did that, don't error out here */
142 warning(_("Could not remove .gitmodules entry for %s"), path);
143 strbuf_release(&sect);
144 return -1;
145 }
146 strbuf_release(&sect);
147 return 0;
148 }
149
150 void stage_updated_gitmodules(struct index_state *istate)
151 {
152 if (add_file_to_index(istate, GITMODULES_FILE, 0))
153 die(_("staging updated .gitmodules failed"));
154 }
155
156 /* TODO: remove this function, use repo_submodule_init instead. */
157 int add_submodule_odb(const char *path)
158 {
159 struct strbuf objects_directory = STRBUF_INIT;
160 int ret = 0;
161
162 ret = strbuf_git_path_submodule(&objects_directory, path, "objects/");
163 if (ret)
164 goto done;
165 if (!is_directory(objects_directory.buf)) {
166 ret = -1;
167 goto done;
168 }
169 add_to_alternates_memory(objects_directory.buf);
170 done:
171 strbuf_release(&objects_directory);
172 return ret;
173 }
174
175 void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
176 const char *path)
177 {
178 const struct submodule *submodule = submodule_from_path(the_repository,
179 &null_oid, path);
180 if (submodule) {
181 const char *ignore;
182 char *key;
183
184 key = xstrfmt("submodule.%s.ignore", submodule->name);
185 if (repo_config_get_string_const(the_repository, key, &ignore))
186 ignore = submodule->ignore;
187 free(key);
188
189 if (ignore)
190 handle_ignore_submodules_arg(diffopt, ignore);
191 else if (is_gitmodules_unmerged(&the_index))
192 diffopt->flags.ignore_submodules = 1;
193 }
194 }
195
196 /* Cheap function that only determines if we're interested in submodules at all */
197 int git_default_submodule_config(const char *var, const char *value, void *cb)
198 {
199 if (!strcmp(var, "submodule.recurse")) {
200 int v = git_config_bool(var, value) ?
201 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
202 config_update_recurse_submodules = v;
203 }
204 return 0;
205 }
206
207 int option_parse_recurse_submodules_worktree_updater(const struct option *opt,
208 const char *arg, int unset)
209 {
210 if (unset) {
211 config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
212 return 0;
213 }
214 if (arg)
215 config_update_recurse_submodules =
216 parse_update_recurse_submodules_arg(opt->long_name,
217 arg);
218 else
219 config_update_recurse_submodules = RECURSE_SUBMODULES_ON;
220
221 return 0;
222 }
223
224 /*
225 * Determine if a submodule has been initialized at a given 'path'
226 */
227 int is_submodule_active(struct repository *repo, const char *path)
228 {
229 int ret = 0;
230 char *key = NULL;
231 char *value = NULL;
232 const struct string_list *sl;
233 const struct submodule *module;
234
235 module = submodule_from_path(repo, &null_oid, path);
236
237 /* early return if there isn't a path->module mapping */
238 if (!module)
239 return 0;
240
241 /* submodule.<name>.active is set */
242 key = xstrfmt("submodule.%s.active", module->name);
243 if (!repo_config_get_bool(repo, key, &ret)) {
244 free(key);
245 return ret;
246 }
247 free(key);
248
249 /* submodule.active is set */
250 sl = repo_config_get_value_multi(repo, "submodule.active");
251 if (sl) {
252 struct pathspec ps;
253 struct argv_array args = ARGV_ARRAY_INIT;
254 const struct string_list_item *item;
255
256 for_each_string_list_item(item, sl) {
257 argv_array_push(&args, item->string);
258 }
259
260 parse_pathspec(&ps, 0, 0, NULL, args.argv);
261 ret = match_pathspec(&ps, path, strlen(path), 0, NULL, 1);
262
263 argv_array_clear(&args);
264 clear_pathspec(&ps);
265 return ret;
266 }
267
268 /* fallback to checking if the URL is set */
269 key = xstrfmt("submodule.%s.url", module->name);
270 ret = !repo_config_get_string(repo, key, &value);
271
272 free(value);
273 free(key);
274 return ret;
275 }
276
277 int is_submodule_populated_gently(const char *path, int *return_error_code)
278 {
279 int ret = 0;
280 char *gitdir = xstrfmt("%s/.git", path);
281
282 if (resolve_gitdir_gently(gitdir, return_error_code))
283 ret = 1;
284
285 free(gitdir);
286 return ret;
287 }
288
289 /*
290 * Dies if the provided 'prefix' corresponds to an unpopulated submodule
291 */
292 void die_in_unpopulated_submodule(const struct index_state *istate,
293 const char *prefix)
294 {
295 int i, prefixlen;
296
297 if (!prefix)
298 return;
299
300 prefixlen = strlen(prefix);
301
302 for (i = 0; i < istate->cache_nr; i++) {
303 struct cache_entry *ce = istate->cache[i];
304 int ce_len = ce_namelen(ce);
305
306 if (!S_ISGITLINK(ce->ce_mode))
307 continue;
308 if (prefixlen <= ce_len)
309 continue;
310 if (strncmp(ce->name, prefix, ce_len))
311 continue;
312 if (prefix[ce_len] != '/')
313 continue;
314
315 die(_("in unpopulated submodule '%s'"), ce->name);
316 }
317 }
318
319 /*
320 * Dies if any paths in the provided pathspec descends into a submodule
321 */
322 void die_path_inside_submodule(const struct index_state *istate,
323 const struct pathspec *ps)
324 {
325 int i, j;
326
327 for (i = 0; i < istate->cache_nr; i++) {
328 struct cache_entry *ce = istate->cache[i];
329 int ce_len = ce_namelen(ce);
330
331 if (!S_ISGITLINK(ce->ce_mode))
332 continue;
333
334 for (j = 0; j < ps->nr ; j++) {
335 const struct pathspec_item *item = &ps->items[j];
336
337 if (item->len <= ce_len)
338 continue;
339 if (item->match[ce_len] != '/')
340 continue;
341 if (strncmp(ce->name, item->match, ce_len))
342 continue;
343 if (item->len == ce_len + 1)
344 continue;
345
346 die(_("Pathspec '%s' is in submodule '%.*s'"),
347 item->original, ce_len, ce->name);
348 }
349 }
350 }
351
352 enum submodule_update_type parse_submodule_update_type(const char *value)
353 {
354 if (!strcmp(value, "none"))
355 return SM_UPDATE_NONE;
356 else if (!strcmp(value, "checkout"))
357 return SM_UPDATE_CHECKOUT;
358 else if (!strcmp(value, "rebase"))
359 return SM_UPDATE_REBASE;
360 else if (!strcmp(value, "merge"))
361 return SM_UPDATE_MERGE;
362 else if (*value == '!')
363 return SM_UPDATE_COMMAND;
364 else
365 return SM_UPDATE_UNSPECIFIED;
366 }
367
368 int parse_submodule_update_strategy(const char *value,
369 struct submodule_update_strategy *dst)
370 {
371 enum submodule_update_type type;
372
373 free((void*)dst->command);
374 dst->command = NULL;
375
376 type = parse_submodule_update_type(value);
377 if (type == SM_UPDATE_UNSPECIFIED)
378 return -1;
379
380 dst->type = type;
381 if (type == SM_UPDATE_COMMAND)
382 dst->command = xstrdup(value + 1);
383
384 return 0;
385 }
386
387 const char *submodule_strategy_to_string(const struct submodule_update_strategy *s)
388 {
389 struct strbuf sb = STRBUF_INIT;
390 switch (s->type) {
391 case SM_UPDATE_CHECKOUT:
392 return "checkout";
393 case SM_UPDATE_MERGE:
394 return "merge";
395 case SM_UPDATE_REBASE:
396 return "rebase";
397 case SM_UPDATE_NONE:
398 return "none";
399 case SM_UPDATE_UNSPECIFIED:
400 return NULL;
401 case SM_UPDATE_COMMAND:
402 strbuf_addf(&sb, "!%s", s->command);
403 return strbuf_detach(&sb, NULL);
404 }
405 return NULL;
406 }
407
408 void handle_ignore_submodules_arg(struct diff_options *diffopt,
409 const char *arg)
410 {
411 diffopt->flags.ignore_submodules = 0;
412 diffopt->flags.ignore_untracked_in_submodules = 0;
413 diffopt->flags.ignore_dirty_submodules = 0;
414
415 if (!strcmp(arg, "all"))
416 diffopt->flags.ignore_submodules = 1;
417 else if (!strcmp(arg, "untracked"))
418 diffopt->flags.ignore_untracked_in_submodules = 1;
419 else if (!strcmp(arg, "dirty"))
420 diffopt->flags.ignore_dirty_submodules = 1;
421 else if (strcmp(arg, "none"))
422 die("bad --ignore-submodules argument: %s", arg);
423 }
424
425 static int prepare_submodule_summary(struct rev_info *rev, const char *path,
426 struct commit *left, struct commit *right,
427 struct commit_list *merge_bases)
428 {
429 struct commit_list *list;
430
431 init_revisions(rev, NULL);
432 setup_revisions(0, NULL, rev, NULL);
433 rev->left_right = 1;
434 rev->first_parent_only = 1;
435 left->object.flags |= SYMMETRIC_LEFT;
436 add_pending_object(rev, &left->object, path);
437 add_pending_object(rev, &right->object, path);
438 for (list = merge_bases; list; list = list->next) {
439 list->item->object.flags |= UNINTERESTING;
440 add_pending_object(rev, &list->item->object,
441 oid_to_hex(&list->item->object.oid));
442 }
443 return prepare_revision_walk(rev);
444 }
445
446 static void print_submodule_summary(struct rev_info *rev, struct diff_options *o)
447 {
448 static const char format[] = " %m %s";
449 struct strbuf sb = STRBUF_INIT;
450 struct commit *commit;
451
452 while ((commit = get_revision(rev))) {
453 struct pretty_print_context ctx = {0};
454 ctx.date_mode = rev->date_mode;
455 ctx.output_encoding = get_log_output_encoding();
456 strbuf_setlen(&sb, 0);
457 format_commit_message(commit, format, &sb, &ctx);
458 strbuf_addch(&sb, '\n');
459 if (commit->object.flags & SYMMETRIC_LEFT)
460 diff_emit_submodule_del(o, sb.buf);
461 else
462 diff_emit_submodule_add(o, sb.buf);
463 }
464 strbuf_release(&sb);
465 }
466
467 static void prepare_submodule_repo_env_no_git_dir(struct argv_array *out)
468 {
469 const char * const *var;
470
471 for (var = local_repo_env; *var; var++) {
472 if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
473 argv_array_push(out, *var);
474 }
475 }
476
477 void prepare_submodule_repo_env(struct argv_array *out)
478 {
479 prepare_submodule_repo_env_no_git_dir(out);
480 argv_array_pushf(out, "%s=%s", GIT_DIR_ENVIRONMENT,
481 DEFAULT_GIT_DIR_ENVIRONMENT);
482 }
483
484 /* Helper function to display the submodule header line prior to the full
485 * summary output. If it can locate the submodule objects directory it will
486 * attempt to lookup both the left and right commits and put them into the
487 * left and right pointers.
488 */
489 static void show_submodule_header(struct diff_options *o, const char *path,
490 struct object_id *one, struct object_id *two,
491 unsigned dirty_submodule,
492 struct commit **left, struct commit **right,
493 struct commit_list **merge_bases)
494 {
495 const char *message = NULL;
496 struct strbuf sb = STRBUF_INIT;
497 int fast_forward = 0, fast_backward = 0;
498
499 if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
500 diff_emit_submodule_untracked(o, path);
501
502 if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
503 diff_emit_submodule_modified(o, path);
504
505 if (is_null_oid(one))
506 message = "(new submodule)";
507 else if (is_null_oid(two))
508 message = "(submodule deleted)";
509
510 if (add_submodule_odb(path)) {
511 if (!message)
512 message = "(commits not present)";
513 goto output_header;
514 }
515
516 /*
517 * Attempt to lookup the commit references, and determine if this is
518 * a fast forward or fast backwards update.
519 */
520 *left = lookup_commit_reference(the_repository, one);
521 *right = lookup_commit_reference(the_repository, two);
522
523 /*
524 * Warn about missing commits in the submodule project, but only if
525 * they aren't null.
526 */
527 if ((!is_null_oid(one) && !*left) ||
528 (!is_null_oid(two) && !*right))
529 message = "(commits not present)";
530
531 *merge_bases = get_merge_bases(*left, *right);
532 if (*merge_bases) {
533 if ((*merge_bases)->item == *left)
534 fast_forward = 1;
535 else if ((*merge_bases)->item == *right)
536 fast_backward = 1;
537 }
538
539 if (!oidcmp(one, two)) {
540 strbuf_release(&sb);
541 return;
542 }
543
544 output_header:
545 strbuf_addf(&sb, "Submodule %s ", path);
546 strbuf_add_unique_abbrev(&sb, one, DEFAULT_ABBREV);
547 strbuf_addstr(&sb, (fast_backward || fast_forward) ? ".." : "...");
548 strbuf_add_unique_abbrev(&sb, two, DEFAULT_ABBREV);
549 if (message)
550 strbuf_addf(&sb, " %s\n", message);
551 else
552 strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
553 diff_emit_submodule_header(o, sb.buf);
554
555 strbuf_release(&sb);
556 }
557
558 void show_submodule_summary(struct diff_options *o, const char *path,
559 struct object_id *one, struct object_id *two,
560 unsigned dirty_submodule)
561 {
562 struct rev_info rev;
563 struct commit *left = NULL, *right = NULL;
564 struct commit_list *merge_bases = NULL;
565
566 show_submodule_header(o, path, one, two, dirty_submodule,
567 &left, &right, &merge_bases);
568
569 /*
570 * If we don't have both a left and a right pointer, there is no
571 * reason to try and display a summary. The header line should contain
572 * all the information the user needs.
573 */
574 if (!left || !right)
575 goto out;
576
577 /* Treat revision walker failure the same as missing commits */
578 if (prepare_submodule_summary(&rev, path, left, right, merge_bases)) {
579 diff_emit_submodule_error(o, "(revision walker failed)\n");
580 goto out;
581 }
582
583 print_submodule_summary(&rev, o);
584
585 out:
586 if (merge_bases)
587 free_commit_list(merge_bases);
588 clear_commit_marks(left, ~0);
589 clear_commit_marks(right, ~0);
590 }
591
592 void show_submodule_inline_diff(struct diff_options *o, const char *path,
593 struct object_id *one, struct object_id *two,
594 unsigned dirty_submodule)
595 {
596 const struct object_id *old_oid = the_hash_algo->empty_tree, *new_oid = the_hash_algo->empty_tree;
597 struct commit *left = NULL, *right = NULL;
598 struct commit_list *merge_bases = NULL;
599 struct child_process cp = CHILD_PROCESS_INIT;
600 struct strbuf sb = STRBUF_INIT;
601
602 show_submodule_header(o, path, one, two, dirty_submodule,
603 &left, &right, &merge_bases);
604
605 /* We need a valid left and right commit to display a difference */
606 if (!(left || is_null_oid(one)) ||
607 !(right || is_null_oid(two)))
608 goto done;
609
610 if (left)
611 old_oid = one;
612 if (right)
613 new_oid = two;
614
615 cp.git_cmd = 1;
616 cp.dir = path;
617 cp.out = -1;
618 cp.no_stdin = 1;
619
620 /* TODO: other options may need to be passed here. */
621 argv_array_pushl(&cp.args, "diff", "--submodule=diff", NULL);
622 argv_array_pushf(&cp.args, "--color=%s", want_color(o->use_color) ?
623 "always" : "never");
624
625 if (o->flags.reverse_diff) {
626 argv_array_pushf(&cp.args, "--src-prefix=%s%s/",
627 o->b_prefix, path);
628 argv_array_pushf(&cp.args, "--dst-prefix=%s%s/",
629 o->a_prefix, path);
630 } else {
631 argv_array_pushf(&cp.args, "--src-prefix=%s%s/",
632 o->a_prefix, path);
633 argv_array_pushf(&cp.args, "--dst-prefix=%s%s/",
634 o->b_prefix, path);
635 }
636 argv_array_push(&cp.args, oid_to_hex(old_oid));
637 /*
638 * If the submodule has modified content, we will diff against the
639 * work tree, under the assumption that the user has asked for the
640 * diff format and wishes to actually see all differences even if they
641 * haven't yet been committed to the submodule yet.
642 */
643 if (!(dirty_submodule & DIRTY_SUBMODULE_MODIFIED))
644 argv_array_push(&cp.args, oid_to_hex(new_oid));
645
646 prepare_submodule_repo_env(&cp.env_array);
647 if (start_command(&cp))
648 diff_emit_submodule_error(o, "(diff failed)\n");
649
650 while (strbuf_getwholeline_fd(&sb, cp.out, '\n') != EOF)
651 diff_emit_submodule_pipethrough(o, sb.buf, sb.len);
652
653 if (finish_command(&cp))
654 diff_emit_submodule_error(o, "(diff failed)\n");
655
656 done:
657 strbuf_release(&sb);
658 if (merge_bases)
659 free_commit_list(merge_bases);
660 if (left)
661 clear_commit_marks(left, ~0);
662 if (right)
663 clear_commit_marks(right, ~0);
664 }
665
666 int should_update_submodules(void)
667 {
668 return config_update_recurse_submodules == RECURSE_SUBMODULES_ON;
669 }
670
671 const struct submodule *submodule_from_ce(const struct cache_entry *ce)
672 {
673 if (!S_ISGITLINK(ce->ce_mode))
674 return NULL;
675
676 if (!should_update_submodules())
677 return NULL;
678
679 return submodule_from_path(the_repository, &null_oid, ce->name);
680 }
681
682 static struct oid_array *submodule_commits(struct string_list *submodules,
683 const char *name)
684 {
685 struct string_list_item *item;
686
687 item = string_list_insert(submodules, name);
688 if (item->util)
689 return (struct oid_array *) item->util;
690
691 /* NEEDSWORK: should we have oid_array_init()? */
692 item->util = xcalloc(1, sizeof(struct oid_array));
693 return (struct oid_array *) item->util;
694 }
695
696 struct collect_changed_submodules_cb_data {
697 struct string_list *changed;
698 const struct object_id *commit_oid;
699 };
700
701 /*
702 * this would normally be two functions: default_name_from_path() and
703 * path_from_default_name(). Since the default name is the same as
704 * the submodule path we can get away with just one function which only
705 * checks whether there is a submodule in the working directory at that
706 * location.
707 */
708 static const char *default_name_or_path(const char *path_or_name)
709 {
710 int error_code;
711
712 if (!is_submodule_populated_gently(path_or_name, &error_code))
713 return NULL;
714
715 return path_or_name;
716 }
717
718 static void collect_changed_submodules_cb(struct diff_queue_struct *q,
719 struct diff_options *options,
720 void *data)
721 {
722 struct collect_changed_submodules_cb_data *me = data;
723 struct string_list *changed = me->changed;
724 const struct object_id *commit_oid = me->commit_oid;
725 int i;
726
727 for (i = 0; i < q->nr; i++) {
728 struct diff_filepair *p = q->queue[i];
729 struct oid_array *commits;
730 const struct submodule *submodule;
731 const char *name;
732
733 if (!S_ISGITLINK(p->two->mode))
734 continue;
735
736 submodule = submodule_from_path(the_repository,
737 commit_oid, p->two->path);
738 if (submodule)
739 name = submodule->name;
740 else {
741 name = default_name_or_path(p->two->path);
742 /* make sure name does not collide with existing one */
743 if (name)
744 submodule = submodule_from_name(the_repository,
745 commit_oid, name);
746 if (submodule) {
747 warning("Submodule in commit %s at path: "
748 "'%s' collides with a submodule named "
749 "the same. Skipping it.",
750 oid_to_hex(commit_oid), p->two->path);
751 name = NULL;
752 }
753 }
754
755 if (!name)
756 continue;
757
758 commits = submodule_commits(changed, name);
759 oid_array_append(commits, &p->two->oid);
760 }
761 }
762
763 /*
764 * Collect the paths of submodules in 'changed' which have changed based on
765 * the revisions as specified in 'argv'. Each entry in 'changed' will also
766 * have a corresponding 'struct oid_array' (in the 'util' field) which lists
767 * what the submodule pointers were updated to during the change.
768 */
769 static void collect_changed_submodules(struct string_list *changed,
770 struct argv_array *argv)
771 {
772 struct rev_info rev;
773 const struct commit *commit;
774
775 init_revisions(&rev, NULL);
776 setup_revisions(argv->argc, argv->argv, &rev, NULL);
777 if (prepare_revision_walk(&rev))
778 die("revision walk setup failed");
779
780 while ((commit = get_revision(&rev))) {
781 struct rev_info diff_rev;
782 struct collect_changed_submodules_cb_data data;
783 data.changed = changed;
784 data.commit_oid = &commit->object.oid;
785
786 init_revisions(&diff_rev, NULL);
787 diff_rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
788 diff_rev.diffopt.format_callback = collect_changed_submodules_cb;
789 diff_rev.diffopt.format_callback_data = &data;
790 diff_tree_combined_merge(commit, 1, &diff_rev);
791 }
792
793 reset_revision_walk();
794 }
795
796 static void free_submodules_oids(struct string_list *submodules)
797 {
798 struct string_list_item *item;
799 for_each_string_list_item(item, submodules)
800 oid_array_clear((struct oid_array *) item->util);
801 string_list_clear(submodules, 1);
802 }
803
804 static int has_remote(const char *refname, const struct object_id *oid,
805 int flags, void *cb_data)
806 {
807 return 1;
808 }
809
810 static int append_oid_to_argv(const struct object_id *oid, void *data)
811 {
812 struct argv_array *argv = data;
813 argv_array_push(argv, oid_to_hex(oid));
814 return 0;
815 }
816
817 struct has_commit_data {
818 int result;
819 const char *path;
820 };
821
822 static int check_has_commit(const struct object_id *oid, void *data)
823 {
824 struct has_commit_data *cb = data;
825
826 enum object_type type = oid_object_info(the_repository, oid, NULL);
827
828 switch (type) {
829 case OBJ_COMMIT:
830 return 0;
831 case OBJ_BAD:
832 /*
833 * Object is missing or invalid. If invalid, an error message
834 * has already been printed.
835 */
836 cb->result = 0;
837 return 0;
838 default:
839 die(_("submodule entry '%s' (%s) is a %s, not a commit"),
840 cb->path, oid_to_hex(oid), type_name(type));
841 }
842 }
843
844 static int submodule_has_commits(const char *path, struct oid_array *commits)
845 {
846 struct has_commit_data has_commit = { 1, path };
847
848 /*
849 * Perform a cheap, but incorrect check for the existence of 'commits'.
850 * This is done by adding the submodule's object store to the in-core
851 * object store, and then querying for each commit's existence. If we
852 * do not have the commit object anywhere, there is no chance we have
853 * it in the object store of the correct submodule and have it
854 * reachable from a ref, so we can fail early without spawning rev-list
855 * which is expensive.
856 */
857 if (add_submodule_odb(path))
858 return 0;
859
860 oid_array_for_each_unique(commits, check_has_commit, &has_commit);
861
862 if (has_commit.result) {
863 /*
864 * Even if the submodule is checked out and the commit is
865 * present, make sure it exists in the submodule's object store
866 * and that it is reachable from a ref.
867 */
868 struct child_process cp = CHILD_PROCESS_INIT;
869 struct strbuf out = STRBUF_INIT;
870
871 argv_array_pushl(&cp.args, "rev-list", "-n", "1", NULL);
872 oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args);
873 argv_array_pushl(&cp.args, "--not", "--all", NULL);
874
875 prepare_submodule_repo_env(&cp.env_array);
876 cp.git_cmd = 1;
877 cp.no_stdin = 1;
878 cp.dir = path;
879
880 if (capture_command(&cp, &out, GIT_MAX_HEXSZ + 1) || out.len)
881 has_commit.result = 0;
882
883 strbuf_release(&out);
884 }
885
886 return has_commit.result;
887 }
888
889 static int submodule_needs_pushing(const char *path, struct oid_array *commits)
890 {
891 if (!submodule_has_commits(path, commits))
892 /*
893 * NOTE: We do consider it safe to return "no" here. The
894 * correct answer would be "We do not know" instead of
895 * "No push needed", but it is quite hard to change
896 * the submodule pointer without having the submodule
897 * around. If a user did however change the submodules
898 * without having the submodule around, this indicates
899 * an expert who knows what they are doing or a
900 * maintainer integrating work from other people. In
901 * both cases it should be safe to skip this check.
902 */
903 return 0;
904
905 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
906 struct child_process cp = CHILD_PROCESS_INIT;
907 struct strbuf buf = STRBUF_INIT;
908 int needs_pushing = 0;
909
910 argv_array_push(&cp.args, "rev-list");
911 oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args);
912 argv_array_pushl(&cp.args, "--not", "--remotes", "-n", "1" , NULL);
913
914 prepare_submodule_repo_env(&cp.env_array);
915 cp.git_cmd = 1;
916 cp.no_stdin = 1;
917 cp.out = -1;
918 cp.dir = path;
919 if (start_command(&cp))
920 die("Could not run 'git rev-list <commits> --not --remotes -n 1' command in submodule %s",
921 path);
922 if (strbuf_read(&buf, cp.out, 41))
923 needs_pushing = 1;
924 finish_command(&cp);
925 close(cp.out);
926 strbuf_release(&buf);
927 return needs_pushing;
928 }
929
930 return 0;
931 }
932
933 int find_unpushed_submodules(struct oid_array *commits,
934 const char *remotes_name, struct string_list *needs_pushing)
935 {
936 struct string_list submodules = STRING_LIST_INIT_DUP;
937 struct string_list_item *name;
938 struct argv_array argv = ARGV_ARRAY_INIT;
939
940 /* argv.argv[0] will be ignored by setup_revisions */
941 argv_array_push(&argv, "find_unpushed_submodules");
942 oid_array_for_each_unique(commits, append_oid_to_argv, &argv);
943 argv_array_push(&argv, "--not");
944 argv_array_pushf(&argv, "--remotes=%s", remotes_name);
945
946 collect_changed_submodules(&submodules, &argv);
947
948 for_each_string_list_item(name, &submodules) {
949 struct oid_array *commits = name->util;
950 const struct submodule *submodule;
951 const char *path = NULL;
952
953 submodule = submodule_from_name(the_repository, &null_oid, name->string);
954 if (submodule)
955 path = submodule->path;
956 else
957 path = default_name_or_path(name->string);
958
959 if (!path)
960 continue;
961
962 if (submodule_needs_pushing(path, commits))
963 string_list_insert(needs_pushing, path);
964 }
965
966 free_submodules_oids(&submodules);
967 argv_array_clear(&argv);
968
969 return needs_pushing->nr;
970 }
971
972 static int push_submodule(const char *path,
973 const struct remote *remote,
974 const struct refspec *rs,
975 const struct string_list *push_options,
976 int dry_run)
977 {
978 if (add_submodule_odb(path))
979 return 1;
980
981 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
982 struct child_process cp = CHILD_PROCESS_INIT;
983 argv_array_push(&cp.args, "push");
984 if (dry_run)
985 argv_array_push(&cp.args, "--dry-run");
986
987 if (push_options && push_options->nr) {
988 const struct string_list_item *item;
989 for_each_string_list_item(item, push_options)
990 argv_array_pushf(&cp.args, "--push-option=%s",
991 item->string);
992 }
993
994 if (remote->origin != REMOTE_UNCONFIGURED) {
995 int i;
996 argv_array_push(&cp.args, remote->name);
997 for (i = 0; i < rs->raw_nr; i++)
998 argv_array_push(&cp.args, rs->raw[i]);
999 }
1000
1001 prepare_submodule_repo_env(&cp.env_array);
1002 cp.git_cmd = 1;
1003 cp.no_stdin = 1;
1004 cp.dir = path;
1005 if (run_command(&cp))
1006 return 0;
1007 close(cp.out);
1008 }
1009
1010 return 1;
1011 }
1012
1013 /*
1014 * Perform a check in the submodule to see if the remote and refspec work.
1015 * Die if the submodule can't be pushed.
1016 */
1017 static void submodule_push_check(const char *path, const char *head,
1018 const struct remote *remote,
1019 const struct refspec *rs)
1020 {
1021 struct child_process cp = CHILD_PROCESS_INIT;
1022 int i;
1023
1024 argv_array_push(&cp.args, "submodule--helper");
1025 argv_array_push(&cp.args, "push-check");
1026 argv_array_push(&cp.args, head);
1027 argv_array_push(&cp.args, remote->name);
1028
1029 for (i = 0; i < rs->raw_nr; i++)
1030 argv_array_push(&cp.args, rs->raw[i]);
1031
1032 prepare_submodule_repo_env(&cp.env_array);
1033 cp.git_cmd = 1;
1034 cp.no_stdin = 1;
1035 cp.no_stdout = 1;
1036 cp.dir = path;
1037
1038 /*
1039 * Simply indicate if 'submodule--helper push-check' failed.
1040 * More detailed error information will be provided by the
1041 * child process.
1042 */
1043 if (run_command(&cp))
1044 die("process for submodule '%s' failed", path);
1045 }
1046
1047 int push_unpushed_submodules(struct oid_array *commits,
1048 const struct remote *remote,
1049 const struct refspec *rs,
1050 const struct string_list *push_options,
1051 int dry_run)
1052 {
1053 int i, ret = 1;
1054 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1055
1056 if (!find_unpushed_submodules(commits, remote->name, &needs_pushing))
1057 return 1;
1058
1059 /*
1060 * Verify that the remote and refspec can be propagated to all
1061 * submodules. This check can be skipped if the remote and refspec
1062 * won't be propagated due to the remote being unconfigured (e.g. a URL
1063 * instead of a remote name).
1064 */
1065 if (remote->origin != REMOTE_UNCONFIGURED) {
1066 char *head;
1067 struct object_id head_oid;
1068
1069 head = resolve_refdup("HEAD", 0, &head_oid, NULL);
1070 if (!head)
1071 die(_("Failed to resolve HEAD as a valid ref."));
1072
1073 for (i = 0; i < needs_pushing.nr; i++)
1074 submodule_push_check(needs_pushing.items[i].string,
1075 head, remote, rs);
1076 free(head);
1077 }
1078
1079 /* Actually push the submodules */
1080 for (i = 0; i < needs_pushing.nr; i++) {
1081 const char *path = needs_pushing.items[i].string;
1082 fprintf(stderr, "Pushing submodule '%s'\n", path);
1083 if (!push_submodule(path, remote, rs,
1084 push_options, dry_run)) {
1085 fprintf(stderr, "Unable to push submodule '%s'\n", path);
1086 ret = 0;
1087 }
1088 }
1089
1090 string_list_clear(&needs_pushing, 0);
1091
1092 return ret;
1093 }
1094
1095 static int append_oid_to_array(const char *ref, const struct object_id *oid,
1096 int flags, void *data)
1097 {
1098 struct oid_array *array = data;
1099 oid_array_append(array, oid);
1100 return 0;
1101 }
1102
1103 void check_for_new_submodule_commits(struct object_id *oid)
1104 {
1105 if (!initialized_fetch_ref_tips) {
1106 for_each_ref(append_oid_to_array, &ref_tips_before_fetch);
1107 initialized_fetch_ref_tips = 1;
1108 }
1109
1110 oid_array_append(&ref_tips_after_fetch, oid);
1111 }
1112
1113 static void calculate_changed_submodule_paths(void)
1114 {
1115 struct argv_array argv = ARGV_ARRAY_INIT;
1116 struct string_list changed_submodules = STRING_LIST_INIT_DUP;
1117 const struct string_list_item *name;
1118
1119 /* No need to check if there are no submodules configured */
1120 if (!submodule_from_path(the_repository, NULL, NULL))
1121 return;
1122
1123 argv_array_push(&argv, "--"); /* argv[0] program name */
1124 oid_array_for_each_unique(&ref_tips_after_fetch,
1125 append_oid_to_argv, &argv);
1126 argv_array_push(&argv, "--not");
1127 oid_array_for_each_unique(&ref_tips_before_fetch,
1128 append_oid_to_argv, &argv);
1129
1130 /*
1131 * Collect all submodules (whether checked out or not) for which new
1132 * commits have been recorded upstream in "changed_submodule_names".
1133 */
1134 collect_changed_submodules(&changed_submodules, &argv);
1135
1136 for_each_string_list_item(name, &changed_submodules) {
1137 struct oid_array *commits = name->util;
1138 const struct submodule *submodule;
1139 const char *path = NULL;
1140
1141 submodule = submodule_from_name(the_repository, &null_oid, name->string);
1142 if (submodule)
1143 path = submodule->path;
1144 else
1145 path = default_name_or_path(name->string);
1146
1147 if (!path)
1148 continue;
1149
1150 if (!submodule_has_commits(path, commits))
1151 string_list_append(&changed_submodule_names, name->string);
1152 }
1153
1154 free_submodules_oids(&changed_submodules);
1155 argv_array_clear(&argv);
1156 oid_array_clear(&ref_tips_before_fetch);
1157 oid_array_clear(&ref_tips_after_fetch);
1158 initialized_fetch_ref_tips = 0;
1159 }
1160
1161 int submodule_touches_in_range(struct object_id *excl_oid,
1162 struct object_id *incl_oid)
1163 {
1164 struct string_list subs = STRING_LIST_INIT_DUP;
1165 struct argv_array args = ARGV_ARRAY_INIT;
1166 int ret;
1167
1168 /* No need to check if there are no submodules configured */
1169 if (!submodule_from_path(the_repository, NULL, NULL))
1170 return 0;
1171
1172 argv_array_push(&args, "--"); /* args[0] program name */
1173 argv_array_push(&args, oid_to_hex(incl_oid));
1174 if (!is_null_oid(excl_oid)) {
1175 argv_array_push(&args, "--not");
1176 argv_array_push(&args, oid_to_hex(excl_oid));
1177 }
1178
1179 collect_changed_submodules(&subs, &args);
1180 ret = subs.nr;
1181
1182 argv_array_clear(&args);
1183
1184 free_submodules_oids(&subs);
1185 return ret;
1186 }
1187
1188 struct submodule_parallel_fetch {
1189 int count;
1190 struct argv_array args;
1191 struct repository *r;
1192 const char *prefix;
1193 int command_line_option;
1194 int default_option;
1195 int quiet;
1196 int result;
1197 };
1198 #define SPF_INIT {0, ARGV_ARRAY_INIT, NULL, NULL, 0, 0, 0, 0}
1199
1200 static int get_fetch_recurse_config(const struct submodule *submodule,
1201 struct submodule_parallel_fetch *spf)
1202 {
1203 if (spf->command_line_option != RECURSE_SUBMODULES_DEFAULT)
1204 return spf->command_line_option;
1205
1206 if (submodule) {
1207 char *key;
1208 const char *value;
1209
1210 int fetch_recurse = submodule->fetch_recurse;
1211 key = xstrfmt("submodule.%s.fetchRecurseSubmodules", submodule->name);
1212 if (!repo_config_get_string_const(spf->r, key, &value)) {
1213 fetch_recurse = parse_fetch_recurse_submodules_arg(key, value);
1214 }
1215 free(key);
1216
1217 if (fetch_recurse != RECURSE_SUBMODULES_NONE)
1218 /* local config overrules everything except commandline */
1219 return fetch_recurse;
1220 }
1221
1222 return spf->default_option;
1223 }
1224
1225 static int get_next_submodule(struct child_process *cp,
1226 struct strbuf *err, void *data, void **task_cb)
1227 {
1228 int ret = 0;
1229 struct submodule_parallel_fetch *spf = data;
1230
1231 for (; spf->count < spf->r->index->cache_nr; spf->count++) {
1232 struct strbuf submodule_path = STRBUF_INIT;
1233 struct strbuf submodule_git_dir = STRBUF_INIT;
1234 struct strbuf submodule_prefix = STRBUF_INIT;
1235 const struct cache_entry *ce = spf->r->index->cache[spf->count];
1236 const char *git_dir, *default_argv;
1237 const struct submodule *submodule;
1238 struct submodule default_submodule = SUBMODULE_INIT;
1239
1240 if (!S_ISGITLINK(ce->ce_mode))
1241 continue;
1242
1243 submodule = submodule_from_path(spf->r, &null_oid, ce->name);
1244 if (!submodule) {
1245 const char *name = default_name_or_path(ce->name);
1246 if (name) {
1247 default_submodule.path = default_submodule.name = name;
1248 submodule = &default_submodule;
1249 }
1250 }
1251
1252 switch (get_fetch_recurse_config(submodule, spf))
1253 {
1254 default:
1255 case RECURSE_SUBMODULES_DEFAULT:
1256 case RECURSE_SUBMODULES_ON_DEMAND:
1257 if (!submodule || !unsorted_string_list_lookup(&changed_submodule_names,
1258 submodule->name))
1259 continue;
1260 default_argv = "on-demand";
1261 break;
1262 case RECURSE_SUBMODULES_ON:
1263 default_argv = "yes";
1264 break;
1265 case RECURSE_SUBMODULES_OFF:
1266 continue;
1267 }
1268
1269 strbuf_repo_worktree_path(&submodule_path, spf->r, "%s", ce->name);
1270 strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
1271 strbuf_addf(&submodule_prefix, "%s%s/", spf->prefix, ce->name);
1272 git_dir = read_gitfile(submodule_git_dir.buf);
1273 if (!git_dir)
1274 git_dir = submodule_git_dir.buf;
1275 if (is_directory(git_dir)) {
1276 child_process_init(cp);
1277 cp->dir = strbuf_detach(&submodule_path, NULL);
1278 prepare_submodule_repo_env(&cp->env_array);
1279 cp->git_cmd = 1;
1280 if (!spf->quiet)
1281 strbuf_addf(err, "Fetching submodule %s%s\n",
1282 spf->prefix, ce->name);
1283 argv_array_init(&cp->args);
1284 argv_array_pushv(&cp->args, spf->args.argv);
1285 argv_array_push(&cp->args, default_argv);
1286 argv_array_push(&cp->args, "--submodule-prefix");
1287 argv_array_push(&cp->args, submodule_prefix.buf);
1288 ret = 1;
1289 }
1290 strbuf_release(&submodule_path);
1291 strbuf_release(&submodule_git_dir);
1292 strbuf_release(&submodule_prefix);
1293 if (ret) {
1294 spf->count++;
1295 return 1;
1296 }
1297 }
1298 return 0;
1299 }
1300
1301 static int fetch_start_failure(struct strbuf *err,
1302 void *cb, void *task_cb)
1303 {
1304 struct submodule_parallel_fetch *spf = cb;
1305
1306 spf->result = 1;
1307
1308 return 0;
1309 }
1310
1311 static int fetch_finish(int retvalue, struct strbuf *err,
1312 void *cb, void *task_cb)
1313 {
1314 struct submodule_parallel_fetch *spf = cb;
1315
1316 if (retvalue)
1317 spf->result = 1;
1318
1319 return 0;
1320 }
1321
1322 int fetch_populated_submodules(struct repository *r,
1323 const struct argv_array *options,
1324 const char *prefix, int command_line_option,
1325 int default_option,
1326 int quiet, int max_parallel_jobs)
1327 {
1328 int i;
1329 struct submodule_parallel_fetch spf = SPF_INIT;
1330
1331 spf.r = r;
1332 spf.command_line_option = command_line_option;
1333 spf.default_option = default_option;
1334 spf.quiet = quiet;
1335 spf.prefix = prefix;
1336
1337 if (!r->worktree)
1338 goto out;
1339
1340 if (repo_read_index(r) < 0)
1341 die("index file corrupt");
1342
1343 argv_array_push(&spf.args, "fetch");
1344 for (i = 0; i < options->argc; i++)
1345 argv_array_push(&spf.args, options->argv[i]);
1346 argv_array_push(&spf.args, "--recurse-submodules-default");
1347 /* default value, "--submodule-prefix" and its value are added later */
1348
1349 calculate_changed_submodule_paths();
1350 run_processes_parallel(max_parallel_jobs,
1351 get_next_submodule,
1352 fetch_start_failure,
1353 fetch_finish,
1354 &spf);
1355
1356 argv_array_clear(&spf.args);
1357 out:
1358 string_list_clear(&changed_submodule_names, 1);
1359 return spf.result;
1360 }
1361
1362 unsigned is_submodule_modified(const char *path, int ignore_untracked)
1363 {
1364 struct child_process cp = CHILD_PROCESS_INIT;
1365 struct strbuf buf = STRBUF_INIT;
1366 FILE *fp;
1367 unsigned dirty_submodule = 0;
1368 const char *git_dir;
1369 int ignore_cp_exit_code = 0;
1370
1371 strbuf_addf(&buf, "%s/.git", path);
1372 git_dir = read_gitfile(buf.buf);
1373 if (!git_dir)
1374 git_dir = buf.buf;
1375 if (!is_git_directory(git_dir)) {
1376 if (is_directory(git_dir))
1377 die(_("'%s' not recognized as a git repository"), git_dir);
1378 strbuf_release(&buf);
1379 /* The submodule is not checked out, so it is not modified */
1380 return 0;
1381 }
1382 strbuf_reset(&buf);
1383
1384 argv_array_pushl(&cp.args, "status", "--porcelain=2", NULL);
1385 if (ignore_untracked)
1386 argv_array_push(&cp.args, "-uno");
1387
1388 prepare_submodule_repo_env(&cp.env_array);
1389 cp.git_cmd = 1;
1390 cp.no_stdin = 1;
1391 cp.out = -1;
1392 cp.dir = path;
1393 if (start_command(&cp))
1394 die("Could not run 'git status --porcelain=2' in submodule %s", path);
1395
1396 fp = xfdopen(cp.out, "r");
1397 while (strbuf_getwholeline(&buf, fp, '\n') != EOF) {
1398 /* regular untracked files */
1399 if (buf.buf[0] == '?')
1400 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
1401
1402 if (buf.buf[0] == 'u' ||
1403 buf.buf[0] == '1' ||
1404 buf.buf[0] == '2') {
1405 /* T = line type, XY = status, SSSS = submodule state */
1406 if (buf.len < strlen("T XY SSSS"))
1407 BUG("invalid status --porcelain=2 line %s",
1408 buf.buf);
1409
1410 if (buf.buf[5] == 'S' && buf.buf[8] == 'U')
1411 /* nested untracked file */
1412 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
1413
1414 if (buf.buf[0] == 'u' ||
1415 buf.buf[0] == '2' ||
1416 memcmp(buf.buf + 5, "S..U", 4))
1417 /* other change */
1418 dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
1419 }
1420
1421 if ((dirty_submodule & DIRTY_SUBMODULE_MODIFIED) &&
1422 ((dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ||
1423 ignore_untracked)) {
1424 /*
1425 * We're not interested in any further information from
1426 * the child any more, neither output nor its exit code.
1427 */
1428 ignore_cp_exit_code = 1;
1429 break;
1430 }
1431 }
1432 fclose(fp);
1433
1434 if (finish_command(&cp) && !ignore_cp_exit_code)
1435 die("'git status --porcelain=2' failed in submodule %s", path);
1436
1437 strbuf_release(&buf);
1438 return dirty_submodule;
1439 }
1440
1441 int submodule_uses_gitfile(const char *path)
1442 {
1443 struct child_process cp = CHILD_PROCESS_INIT;
1444 const char *argv[] = {
1445 "submodule",
1446 "foreach",
1447 "--quiet",
1448 "--recursive",
1449 "test -f .git",
1450 NULL,
1451 };
1452 struct strbuf buf = STRBUF_INIT;
1453 const char *git_dir;
1454
1455 strbuf_addf(&buf, "%s/.git", path);
1456 git_dir = read_gitfile(buf.buf);
1457 if (!git_dir) {
1458 strbuf_release(&buf);
1459 return 0;
1460 }
1461 strbuf_release(&buf);
1462
1463 /* Now test that all nested submodules use a gitfile too */
1464 cp.argv = argv;
1465 prepare_submodule_repo_env(&cp.env_array);
1466 cp.git_cmd = 1;
1467 cp.no_stdin = 1;
1468 cp.no_stderr = 1;
1469 cp.no_stdout = 1;
1470 cp.dir = path;
1471 if (run_command(&cp))
1472 return 0;
1473
1474 return 1;
1475 }
1476
1477 /*
1478 * Check if it is a bad idea to remove a submodule, i.e. if we'd lose data
1479 * when doing so.
1480 *
1481 * Return 1 if we'd lose data, return 0 if the removal is fine,
1482 * and negative values for errors.
1483 */
1484 int bad_to_remove_submodule(const char *path, unsigned flags)
1485 {
1486 ssize_t len;
1487 struct child_process cp = CHILD_PROCESS_INIT;
1488 struct strbuf buf = STRBUF_INIT;
1489 int ret = 0;
1490
1491 if (!file_exists(path) || is_empty_dir(path))
1492 return 0;
1493
1494 if (!submodule_uses_gitfile(path))
1495 return 1;
1496
1497 argv_array_pushl(&cp.args, "status", "--porcelain",
1498 "--ignore-submodules=none", NULL);
1499
1500 if (flags & SUBMODULE_REMOVAL_IGNORE_UNTRACKED)
1501 argv_array_push(&cp.args, "-uno");
1502 else
1503 argv_array_push(&cp.args, "-uall");
1504
1505 if (!(flags & SUBMODULE_REMOVAL_IGNORE_IGNORED_UNTRACKED))
1506 argv_array_push(&cp.args, "--ignored");
1507
1508 prepare_submodule_repo_env(&cp.env_array);
1509 cp.git_cmd = 1;
1510 cp.no_stdin = 1;
1511 cp.out = -1;
1512 cp.dir = path;
1513 if (start_command(&cp)) {
1514 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
1515 die(_("could not start 'git status' in submodule '%s'"),
1516 path);
1517 ret = -1;
1518 goto out;
1519 }
1520
1521 len = strbuf_read(&buf, cp.out, 1024);
1522 if (len > 2)
1523 ret = 1;
1524 close(cp.out);
1525
1526 if (finish_command(&cp)) {
1527 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
1528 die(_("could not run 'git status' in submodule '%s'"),
1529 path);
1530 ret = -1;
1531 }
1532 out:
1533 strbuf_release(&buf);
1534 return ret;
1535 }
1536
1537 void submodule_unset_core_worktree(const struct submodule *sub)
1538 {
1539 char *config_path = xstrfmt("%s/modules/%s/config",
1540 get_git_common_dir(), sub->name);
1541
1542 if (git_config_set_in_file_gently(config_path, "core.worktree", NULL))
1543 warning(_("Could not unset core.worktree setting in submodule '%s'"),
1544 sub->path);
1545
1546 free(config_path);
1547 }
1548
1549 static const char *get_super_prefix_or_empty(void)
1550 {
1551 const char *s = get_super_prefix();
1552 if (!s)
1553 s = "";
1554 return s;
1555 }
1556
1557 static int submodule_has_dirty_index(const struct submodule *sub)
1558 {
1559 struct child_process cp = CHILD_PROCESS_INIT;
1560
1561 prepare_submodule_repo_env(&cp.env_array);
1562
1563 cp.git_cmd = 1;
1564 argv_array_pushl(&cp.args, "diff-index", "--quiet",
1565 "--cached", "HEAD", NULL);
1566 cp.no_stdin = 1;
1567 cp.no_stdout = 1;
1568 cp.dir = sub->path;
1569 if (start_command(&cp))
1570 die("could not recurse into submodule '%s'", sub->path);
1571
1572 return finish_command(&cp);
1573 }
1574
1575 static void submodule_reset_index(const char *path)
1576 {
1577 struct child_process cp = CHILD_PROCESS_INIT;
1578 prepare_submodule_repo_env(&cp.env_array);
1579
1580 cp.git_cmd = 1;
1581 cp.no_stdin = 1;
1582 cp.dir = path;
1583
1584 argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
1585 get_super_prefix_or_empty(), path);
1586 argv_array_pushl(&cp.args, "read-tree", "-u", "--reset", NULL);
1587
1588 argv_array_push(&cp.args, empty_tree_oid_hex());
1589
1590 if (run_command(&cp))
1591 die("could not reset submodule index");
1592 }
1593
1594 /**
1595 * Moves a submodule at a given path from a given head to another new head.
1596 * For edge cases (a submodule coming into existence or removing a submodule)
1597 * pass NULL for old or new respectively.
1598 */
1599 int submodule_move_head(const char *path,
1600 const char *old_head,
1601 const char *new_head,
1602 unsigned flags)
1603 {
1604 int ret = 0;
1605 struct child_process cp = CHILD_PROCESS_INIT;
1606 const struct submodule *sub;
1607 int *error_code_ptr, error_code;
1608
1609 if (!is_submodule_active(the_repository, path))
1610 return 0;
1611
1612 if (flags & SUBMODULE_MOVE_HEAD_FORCE)
1613 /*
1614 * Pass non NULL pointer to is_submodule_populated_gently
1615 * to prevent die()-ing. We'll use connect_work_tree_and_git_dir
1616 * to fixup the submodule in the force case later.
1617 */
1618 error_code_ptr = &error_code;
1619 else
1620 error_code_ptr = NULL;
1621
1622 if (old_head && !is_submodule_populated_gently(path, error_code_ptr))
1623 return 0;
1624
1625 sub = submodule_from_path(the_repository, &null_oid, path);
1626
1627 if (!sub)
1628 BUG("could not get submodule information for '%s'", path);
1629
1630 if (old_head && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) {
1631 /* Check if the submodule has a dirty index. */
1632 if (submodule_has_dirty_index(sub))
1633 return error(_("submodule '%s' has dirty index"), path);
1634 }
1635
1636 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1637 if (old_head) {
1638 if (!submodule_uses_gitfile(path))
1639 absorb_git_dir_into_superproject("", path,
1640 ABSORB_GITDIR_RECURSE_SUBMODULES);
1641 } else {
1642 char *gitdir = xstrfmt("%s/modules/%s",
1643 get_git_common_dir(), sub->name);
1644 connect_work_tree_and_git_dir(path, gitdir, 0);
1645 free(gitdir);
1646
1647 /* make sure the index is clean as well */
1648 submodule_reset_index(path);
1649 }
1650
1651 if (old_head && (flags & SUBMODULE_MOVE_HEAD_FORCE)) {
1652 char *gitdir = xstrfmt("%s/modules/%s",
1653 get_git_common_dir(), sub->name);
1654 connect_work_tree_and_git_dir(path, gitdir, 1);
1655 free(gitdir);
1656 }
1657 }
1658
1659 prepare_submodule_repo_env(&cp.env_array);
1660
1661 cp.git_cmd = 1;
1662 cp.no_stdin = 1;
1663 cp.dir = path;
1664
1665 argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
1666 get_super_prefix_or_empty(), path);
1667 argv_array_pushl(&cp.args, "read-tree", "--recurse-submodules", NULL);
1668
1669 if (flags & SUBMODULE_MOVE_HEAD_DRY_RUN)
1670 argv_array_push(&cp.args, "-n");
1671 else
1672 argv_array_push(&cp.args, "-u");
1673
1674 if (flags & SUBMODULE_MOVE_HEAD_FORCE)
1675 argv_array_push(&cp.args, "--reset");
1676 else
1677 argv_array_push(&cp.args, "-m");
1678
1679 if (!(flags & SUBMODULE_MOVE_HEAD_FORCE))
1680 argv_array_push(&cp.args, old_head ? old_head : empty_tree_oid_hex());
1681
1682 argv_array_push(&cp.args, new_head ? new_head : empty_tree_oid_hex());
1683
1684 if (run_command(&cp)) {
1685 ret = error(_("Submodule '%s' could not be updated."), path);
1686 goto out;
1687 }
1688
1689 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1690 if (new_head) {
1691 child_process_init(&cp);
1692 /* also set the HEAD accordingly */
1693 cp.git_cmd = 1;
1694 cp.no_stdin = 1;
1695 cp.dir = path;
1696
1697 prepare_submodule_repo_env(&cp.env_array);
1698 argv_array_pushl(&cp.args, "update-ref", "HEAD",
1699 "--no-deref", new_head, NULL);
1700
1701 if (run_command(&cp)) {
1702 ret = -1;
1703 goto out;
1704 }
1705 } else {
1706 struct strbuf sb = STRBUF_INIT;
1707
1708 strbuf_addf(&sb, "%s/.git", path);
1709 unlink_or_warn(sb.buf);
1710 strbuf_release(&sb);
1711
1712 if (is_empty_dir(path))
1713 rmdir_or_warn(path);
1714
1715 submodule_unset_core_worktree(sub);
1716 }
1717 }
1718 out:
1719 return ret;
1720 }
1721
1722 /*
1723 * Embeds a single submodules git directory into the superprojects git dir,
1724 * non recursively.
1725 */
1726 static void relocate_single_git_dir_into_superproject(const char *prefix,
1727 const char *path)
1728 {
1729 char *old_git_dir = NULL, *real_old_git_dir = NULL, *real_new_git_dir = NULL;
1730 const char *new_git_dir;
1731 const struct submodule *sub;
1732
1733 if (submodule_uses_worktrees(path))
1734 die(_("relocate_gitdir for submodule '%s' with "
1735 "more than one worktree not supported"), path);
1736
1737 old_git_dir = xstrfmt("%s/.git", path);
1738 if (read_gitfile(old_git_dir))
1739 /* If it is an actual gitfile, it doesn't need migration. */
1740 return;
1741
1742 real_old_git_dir = real_pathdup(old_git_dir, 1);
1743
1744 sub = submodule_from_path(the_repository, &null_oid, path);
1745 if (!sub)
1746 die(_("could not lookup name for submodule '%s'"), path);
1747
1748 new_git_dir = git_path("modules/%s", sub->name);
1749 if (safe_create_leading_directories_const(new_git_dir) < 0)
1750 die(_("could not create directory '%s'"), new_git_dir);
1751 real_new_git_dir = real_pathdup(new_git_dir, 1);
1752
1753 fprintf(stderr, _("Migrating git directory of '%s%s' from\n'%s' to\n'%s'\n"),
1754 get_super_prefix_or_empty(), path,
1755 real_old_git_dir, real_new_git_dir);
1756
1757 relocate_gitdir(path, real_old_git_dir, real_new_git_dir);
1758
1759 free(old_git_dir);
1760 free(real_old_git_dir);
1761 free(real_new_git_dir);
1762 }
1763
1764 /*
1765 * Migrate the git directory of the submodule given by path from
1766 * having its git directory within the working tree to the git dir nested
1767 * in its superprojects git dir under modules/.
1768 */
1769 void absorb_git_dir_into_superproject(const char *prefix,
1770 const char *path,
1771 unsigned flags)
1772 {
1773 int err_code;
1774 const char *sub_git_dir;
1775 struct strbuf gitdir = STRBUF_INIT;
1776 strbuf_addf(&gitdir, "%s/.git", path);
1777 sub_git_dir = resolve_gitdir_gently(gitdir.buf, &err_code);
1778
1779 /* Not populated? */
1780 if (!sub_git_dir) {
1781 const struct submodule *sub;
1782
1783 if (err_code == READ_GITFILE_ERR_STAT_FAILED) {
1784 /* unpopulated as expected */
1785 strbuf_release(&gitdir);
1786 return;
1787 }
1788
1789 if (err_code != READ_GITFILE_ERR_NOT_A_REPO)
1790 /* We don't know what broke here. */
1791 read_gitfile_error_die(err_code, path, NULL);
1792
1793 /*
1794 * Maybe populated, but no git directory was found?
1795 * This can happen if the superproject is a submodule
1796 * itself and was just absorbed. The absorption of the
1797 * superproject did not rewrite the git file links yet,
1798 * fix it now.
1799 */
1800 sub = submodule_from_path(the_repository, &null_oid, path);
1801 if (!sub)
1802 die(_("could not lookup name for submodule '%s'"), path);
1803 connect_work_tree_and_git_dir(path,
1804 git_path("modules/%s", sub->name), 0);
1805 } else {
1806 /* Is it already absorbed into the superprojects git dir? */
1807 char *real_sub_git_dir = real_pathdup(sub_git_dir, 1);
1808 char *real_common_git_dir = real_pathdup(get_git_common_dir(), 1);
1809
1810 if (!starts_with(real_sub_git_dir, real_common_git_dir))
1811 relocate_single_git_dir_into_superproject(prefix, path);
1812
1813 free(real_sub_git_dir);
1814 free(real_common_git_dir);
1815 }
1816 strbuf_release(&gitdir);
1817
1818 if (flags & ABSORB_GITDIR_RECURSE_SUBMODULES) {
1819 struct child_process cp = CHILD_PROCESS_INIT;
1820 struct strbuf sb = STRBUF_INIT;
1821
1822 if (flags & ~ABSORB_GITDIR_RECURSE_SUBMODULES)
1823 BUG("we don't know how to pass the flags down?");
1824
1825 strbuf_addstr(&sb, get_super_prefix_or_empty());
1826 strbuf_addstr(&sb, path);
1827 strbuf_addch(&sb, '/');
1828
1829 cp.dir = path;
1830 cp.git_cmd = 1;
1831 cp.no_stdin = 1;
1832 argv_array_pushl(&cp.args, "--super-prefix", sb.buf,
1833 "submodule--helper",
1834 "absorb-git-dirs", NULL);
1835 prepare_submodule_repo_env(&cp.env_array);
1836 if (run_command(&cp))
1837 die(_("could not recurse into submodule '%s'"), path);
1838
1839 strbuf_release(&sb);
1840 }
1841 }
1842
1843 const char *get_superproject_working_tree(void)
1844 {
1845 struct child_process cp = CHILD_PROCESS_INIT;
1846 struct strbuf sb = STRBUF_INIT;
1847 const char *one_up = real_path_if_valid("../");
1848 const char *cwd = xgetcwd();
1849 const char *ret = NULL;
1850 const char *subpath;
1851 int code;
1852 ssize_t len;
1853
1854 if (!is_inside_work_tree())
1855 /*
1856 * FIXME:
1857 * We might have a superproject, but it is harder
1858 * to determine.
1859 */
1860 return NULL;
1861
1862 if (!one_up)
1863 return NULL;
1864
1865 subpath = relative_path(cwd, one_up, &sb);
1866
1867 prepare_submodule_repo_env(&cp.env_array);
1868 argv_array_pop(&cp.env_array);
1869
1870 argv_array_pushl(&cp.args, "--literal-pathspecs", "-C", "..",
1871 "ls-files", "-z", "--stage", "--full-name", "--",
1872 subpath, NULL);
1873 strbuf_reset(&sb);
1874
1875 cp.no_stdin = 1;
1876 cp.no_stderr = 1;
1877 cp.out = -1;
1878 cp.git_cmd = 1;
1879
1880 if (start_command(&cp))
1881 die(_("could not start ls-files in .."));
1882
1883 len = strbuf_read(&sb, cp.out, PATH_MAX);
1884 close(cp.out);
1885
1886 if (starts_with(sb.buf, "160000")) {
1887 int super_sub_len;
1888 int cwd_len = strlen(cwd);
1889 char *super_sub, *super_wt;
1890
1891 /*
1892 * There is a superproject having this repo as a submodule.
1893 * The format is <mode> SP <hash> SP <stage> TAB <full name> \0,
1894 * We're only interested in the name after the tab.
1895 */
1896 super_sub = strchr(sb.buf, '\t') + 1;
1897 super_sub_len = sb.buf + sb.len - super_sub - 1;
1898
1899 if (super_sub_len > cwd_len ||
1900 strcmp(&cwd[cwd_len - super_sub_len], super_sub))
1901 BUG("returned path string doesn't match cwd?");
1902
1903 super_wt = xstrdup(cwd);
1904 super_wt[cwd_len - super_sub_len] = '\0';
1905
1906 ret = real_path(super_wt);
1907 free(super_wt);
1908 }
1909 strbuf_release(&sb);
1910
1911 code = finish_command(&cp);
1912
1913 if (code == 128)
1914 /* '../' is not a git repository */
1915 return NULL;
1916 if (code == 0 && len == 0)
1917 /* There is an unrelated git repository at '../' */
1918 return NULL;
1919 if (code)
1920 die(_("ls-tree returned unexpected return code %d"), code);
1921
1922 return ret;
1923 }
1924
1925 /*
1926 * Put the gitdir for a submodule (given relative to the main
1927 * repository worktree) into `buf`, or return -1 on error.
1928 */
1929 int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
1930 {
1931 const struct submodule *sub;
1932 const char *git_dir;
1933 int ret = 0;
1934
1935 strbuf_reset(buf);
1936 strbuf_addstr(buf, submodule);
1937 strbuf_complete(buf, '/');
1938 strbuf_addstr(buf, ".git");
1939
1940 git_dir = read_gitfile(buf->buf);
1941 if (git_dir) {
1942 strbuf_reset(buf);
1943 strbuf_addstr(buf, git_dir);
1944 }
1945 if (!is_git_directory(buf->buf)) {
1946 sub = submodule_from_path(the_repository, &null_oid, submodule);
1947 if (!sub) {
1948 ret = -1;
1949 goto cleanup;
1950 }
1951 strbuf_reset(buf);
1952 strbuf_git_path(buf, "%s/%s", "modules", sub->name);
1953 }
1954
1955 cleanup:
1956 return ret;
1957 }
git for Debian