submodule: add die_in_unpopulated_submodule function
[git/git.git] / submodule.c
CommitLineData
752c0c24 1#include "cache.h"
851e18c3 2#include "submodule-config.h"
752c0c24
JS
3#include "submodule.h"
4#include "dir.h"
5#include "diff.h"
6#include "commit.h"
7#include "revision.h"
ee6fc514 8#include "run-command.h"
c7e1a736 9#include "diffcore.h"
68d03e4a 10#include "refs.h"
aee9c7d6 11#include "string-list.h"
6859de45 12#include "sha1-array.h"
c1189cae 13#include "argv-array.h"
5fee9952 14#include "blob.h"
fe85ee6e 15#include "thread-utils.h"
4638728c 16#include "quote.h"
06bf4ad1 17#include "remote.h"
f6f85861 18#include "worktree.h"
aee9c7d6 19
88a21979 20static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND;
cf055e46 21static int config_update_recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
a028a193 22static int parallel_jobs = 1;
2721ce21 23static struct string_list changed_submodule_paths = STRING_LIST_INIT_NODUP;
6859de45 24static int initialized_fetch_ref_tips;
910650d2 25static struct oid_array ref_tips_before_fetch;
26static struct oid_array ref_tips_after_fetch;
6859de45 27
d4e98b58
JL
28/*
29 * The following flag is set if the .gitmodules file is unmerged. We then
30 * disable recursion for all submodules where .git/config doesn't have a
31 * matching config entry because we can't guess what might be configured in
32 * .gitmodules unless the user resolves the conflict. When a command line
33 * option is given (which always overrides configuration) this flag will be
34 * ignored.
35 */
36static int gitmodules_is_unmerged;
752c0c24 37
5fee9952
JL
38/*
39 * This flag is set if the .gitmodules file had unstaged modifications on
40 * startup. This must be checked before allowing modifications to the
41 * .gitmodules file with the intention to stage them later, because when
42 * continuing we would stage the modifications the user didn't stage herself
43 * too. That might change in a future version when we learn to stage the
44 * changes we do ourselves without staging any previous modifications.
45 */
46static int gitmodules_is_modified;
47
5fee9952
JL
48int is_staging_gitmodules_ok(void)
49{
50 return !gitmodules_is_modified;
51}
52
0656781f
JL
53/*
54 * Try to update the "path" entry in the "submodule.<name>" section of the
55 * .gitmodules file. Return 0 only if a .gitmodules file was found, a section
56 * with the correct path=<oldpath> setting was found and we could update it.
57 */
58int update_path_in_gitmodules(const char *oldpath, const char *newpath)
59{
60 struct strbuf entry = STRBUF_INIT;
851e18c3 61 const struct submodule *submodule;
0656781f
JL
62
63 if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */
64 return -1;
65
66 if (gitmodules_is_unmerged)
67 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
68
851e18c3
HV
69 submodule = submodule_from_path(null_sha1, oldpath);
70 if (!submodule || !submodule->name) {
0656781f
JL
71 warning(_("Could not find section in .gitmodules where path=%s"), oldpath);
72 return -1;
73 }
74 strbuf_addstr(&entry, "submodule.");
851e18c3 75 strbuf_addstr(&entry, submodule->name);
0656781f 76 strbuf_addstr(&entry, ".path");
30598ad0 77 if (git_config_set_in_file_gently(".gitmodules", entry.buf, newpath) < 0) {
0656781f
JL
78 /* Maybe the user already did that, don't error out here */
79 warning(_("Could not update .gitmodules entry %s"), entry.buf);
80 strbuf_release(&entry);
81 return -1;
82 }
83 strbuf_release(&entry);
84 return 0;
85}
86
95c16418
JL
87/*
88 * Try to remove the "submodule.<name>" section from .gitmodules where the given
89 * path is configured. Return 0 only if a .gitmodules file was found, a section
90 * with the correct path=<path> setting was found and we could remove it.
91 */
92int remove_path_from_gitmodules(const char *path)
93{
94 struct strbuf sect = STRBUF_INIT;
851e18c3 95 const struct submodule *submodule;
95c16418
JL
96
97 if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */
98 return -1;
99
100 if (gitmodules_is_unmerged)
101 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
102
851e18c3
HV
103 submodule = submodule_from_path(null_sha1, path);
104 if (!submodule || !submodule->name) {
95c16418
JL
105 warning(_("Could not find section in .gitmodules where path=%s"), path);
106 return -1;
107 }
108 strbuf_addstr(&sect, "submodule.");
851e18c3 109 strbuf_addstr(&sect, submodule->name);
95c16418
JL
110 if (git_config_rename_section_in_file(".gitmodules", sect.buf, NULL) < 0) {
111 /* Maybe the user already did that, don't error out here */
112 warning(_("Could not remove .gitmodules entry for %s"), path);
113 strbuf_release(&sect);
114 return -1;
115 }
116 strbuf_release(&sect);
117 return 0;
118}
119
5fee9952
JL
120void stage_updated_gitmodules(void)
121{
bc8d6b9b 122 if (add_file_to_cache(".gitmodules", 0))
5fee9952
JL
123 die(_("staging updated .gitmodules failed"));
124}
125
cb58c932 126static int add_submodule_odb(const char *path)
752c0c24
JS
127{
128 struct strbuf objects_directory = STRBUF_INIT;
de7a7960 129 int ret = 0;
752c0c24 130
99b43a61
JK
131 ret = strbuf_git_path_submodule(&objects_directory, path, "objects/");
132 if (ret)
133 goto done;
de7a7960
JL
134 if (!is_directory(objects_directory.buf)) {
135 ret = -1;
136 goto done;
137 }
a5b34d21 138 add_to_alternates_memory(objects_directory.buf);
de7a7960
JL
139done:
140 strbuf_release(&objects_directory);
141 return ret;
752c0c24
JS
142}
143
aee9c7d6
JL
144void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
145 const char *path)
146{
851e18c3
HV
147 const struct submodule *submodule = submodule_from_path(null_sha1, path);
148 if (submodule) {
149 if (submodule->ignore)
150 handle_ignore_submodules_arg(diffopt, submodule->ignore);
d4e98b58
JL
151 else if (gitmodules_is_unmerged)
152 DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
aee9c7d6
JL
153 }
154}
155
7dce19d3 156int submodule_config(const char *var, const char *value, void *cb)
302ad7a9 157{
a028a193
SB
158 if (!strcmp(var, "submodule.fetchjobs")) {
159 parallel_jobs = git_config_int(var, value);
160 if (parallel_jobs < 0)
161 die(_("negative values not allowed for submodule.fetchJobs"));
162 return 0;
163 } else if (starts_with(var, "submodule."))
302ad7a9 164 return parse_submodule_config_option(var, value);
be254a0e 165 else if (!strcmp(var, "fetch.recursesubmodules")) {
1fb25502 166 config_fetch_recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
be254a0e
JL
167 return 0;
168 }
302ad7a9
JL
169 return 0;
170}
171
172void gitmodules_config(void)
173{
174 const char *work_tree = get_git_work_tree();
175 if (work_tree) {
176 struct strbuf gitmodules_path = STRBUF_INIT;
d4e98b58 177 int pos;
302ad7a9
JL
178 strbuf_addstr(&gitmodules_path, work_tree);
179 strbuf_addstr(&gitmodules_path, "/.gitmodules");
d4e98b58
JL
180 if (read_cache() < 0)
181 die("index file corrupt");
182 pos = cache_name_pos(".gitmodules", 11);
183 if (pos < 0) { /* .gitmodules not found or isn't merged */
184 pos = -1 - pos;
185 if (active_nr > pos) { /* there is a .gitmodules */
186 const struct cache_entry *ce = active_cache[pos];
187 if (ce_namelen(ce) == 11 &&
188 !memcmp(ce->name, ".gitmodules", 11))
189 gitmodules_is_unmerged = 1;
190 }
5fee9952
JL
191 } else if (pos < active_nr) {
192 struct stat st;
193 if (lstat(".gitmodules", &st) == 0 &&
194 ce_match_stat(active_cache[pos], &st, 0) & DATA_CHANGED)
195 gitmodules_is_modified = 1;
d4e98b58
JL
196 }
197
198 if (!gitmodules_is_unmerged)
199 git_config_from_file(submodule_config, gitmodules_path.buf, NULL);
302ad7a9
JL
200 strbuf_release(&gitmodules_path);
201 }
202}
203
9ebf689a
BW
204void gitmodules_config_sha1(const unsigned char *commit_sha1)
205{
206 struct strbuf rev = STRBUF_INIT;
207 unsigned char sha1[20];
208
209 if (gitmodule_sha1_from_commit(commit_sha1, sha1, &rev)) {
210 git_config_from_blob_sha1(submodule_config, rev.buf,
211 sha1, NULL);
212 }
213 strbuf_release(&rev);
214}
215
f9f42560 216/*
a086f921
BW
217 * NEEDSWORK: With the addition of different configuration options to determine
218 * if a submodule is of interests, the validity of this function's name comes
219 * into question. Once the dust has settled and more concrete terminology is
220 * decided upon, come up with a more proper name for this function. One
221 * potential candidate could be 'is_submodule_active()'.
222 *
f9f42560
BW
223 * Determine if a submodule has been initialized at a given 'path'
224 */
225int is_submodule_initialized(const char *path)
226{
227 int ret = 0;
a086f921
BW
228 char *key = NULL;
229 char *value = NULL;
230 const struct string_list *sl;
231 const struct submodule *module = submodule_from_path(null_sha1, path);
f9f42560 232
a086f921
BW
233 /* early return if there isn't a path->module mapping */
234 if (!module)
235 return 0;
f9f42560 236
a086f921
BW
237 /* submodule.<name>.active is set */
238 key = xstrfmt("submodule.%s.active", module->name);
239 if (!git_config_get_bool(key, &ret)) {
240 free(key);
241 return ret;
242 }
243 free(key);
f9f42560 244
a086f921
BW
245 /* submodule.active is set */
246 sl = git_config_get_value_multi("submodule.active");
247 if (sl) {
248 struct pathspec ps;
249 struct argv_array args = ARGV_ARRAY_INIT;
250 const struct string_list_item *item;
f9f42560 251
a086f921
BW
252 for_each_string_list_item(item, sl) {
253 argv_array_push(&args, item->string);
254 }
255
256 parse_pathspec(&ps, 0, 0, NULL, args.argv);
257 ret = match_pathspec(&ps, path, strlen(path), 0, NULL, 1);
258
259 argv_array_clear(&args);
260 clear_pathspec(&ps);
261 return ret;
f9f42560
BW
262 }
263
a086f921
BW
264 /* fallback to checking if the URL is set */
265 key = xstrfmt("submodule.%s.url", module->name);
266 ret = !git_config_get_string(key, &value);
267
268 free(value);
269 free(key);
f9f42560
BW
270 return ret;
271}
272
15cdc647 273int is_submodule_populated_gently(const char *path, int *return_error_code)
5688c28d
BW
274{
275 int ret = 0;
276 char *gitdir = xstrfmt("%s/.git", path);
277
15cdc647 278 if (resolve_gitdir_gently(gitdir, return_error_code))
5688c28d
BW
279 ret = 1;
280
281 free(gitdir);
282 return ret;
283}
284
bdab9721
BW
285/*
286 * Dies if the provided 'prefix' corresponds to an unpopulated submodule
287 */
288void die_in_unpopulated_submodule(const struct index_state *istate,
289 const char *prefix)
290{
291 int i, prefixlen;
292
293 if (!prefix)
294 return;
295
296 prefixlen = strlen(prefix);
297
298 for (i = 0; i < istate->cache_nr; i++) {
299 struct cache_entry *ce = istate->cache[i];
300 int ce_len = ce_namelen(ce);
301
302 if (!S_ISGITLINK(ce->ce_mode))
303 continue;
304 if (prefixlen <= ce_len)
305 continue;
306 if (strncmp(ce->name, prefix, ce_len))
307 continue;
308 if (prefix[ce_len] != '/')
309 continue;
310
311 die(_("in unpopulated submodule '%s'"), ce->name);
312 }
313}
314
ea2fa5a3
SB
315int parse_submodule_update_strategy(const char *value,
316 struct submodule_update_strategy *dst)
317{
318 free((void*)dst->command);
319 dst->command = NULL;
320 if (!strcmp(value, "none"))
321 dst->type = SM_UPDATE_NONE;
322 else if (!strcmp(value, "checkout"))
323 dst->type = SM_UPDATE_CHECKOUT;
324 else if (!strcmp(value, "rebase"))
325 dst->type = SM_UPDATE_REBASE;
326 else if (!strcmp(value, "merge"))
327 dst->type = SM_UPDATE_MERGE;
328 else if (skip_prefix(value, "!", &value)) {
329 dst->type = SM_UPDATE_COMMAND;
330 dst->command = xstrdup(value);
331 } else
332 return -1;
333 return 0;
334}
335
3604242f
SB
336const char *submodule_strategy_to_string(const struct submodule_update_strategy *s)
337{
338 struct strbuf sb = STRBUF_INIT;
339 switch (s->type) {
340 case SM_UPDATE_CHECKOUT:
341 return "checkout";
342 case SM_UPDATE_MERGE:
343 return "merge";
344 case SM_UPDATE_REBASE:
345 return "rebase";
346 case SM_UPDATE_NONE:
347 return "none";
348 case SM_UPDATE_UNSPECIFIED:
349 return NULL;
350 case SM_UPDATE_COMMAND:
351 strbuf_addf(&sb, "!%s", s->command);
352 return strbuf_detach(&sb, NULL);
353 }
354 return NULL;
355}
356
46a958b3
JL
357void handle_ignore_submodules_arg(struct diff_options *diffopt,
358 const char *arg)
359{
be4f2b40
JS
360 DIFF_OPT_CLR(diffopt, IGNORE_SUBMODULES);
361 DIFF_OPT_CLR(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
362 DIFF_OPT_CLR(diffopt, IGNORE_DIRTY_SUBMODULES);
363
46a958b3
JL
364 if (!strcmp(arg, "all"))
365 DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
366 else if (!strcmp(arg, "untracked"))
367 DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
368 else if (!strcmp(arg, "dirty"))
369 DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
aee9c7d6 370 else if (strcmp(arg, "none"))
46a958b3
JL
371 die("bad --ignore-submodules argument: %s", arg);
372}
373
808a95dc
JN
374static int prepare_submodule_summary(struct rev_info *rev, const char *path,
375 struct commit *left, struct commit *right,
8e6df650 376 struct commit_list *merge_bases)
808a95dc 377{
8e6df650 378 struct commit_list *list;
808a95dc
JN
379
380 init_revisions(rev, NULL);
381 setup_revisions(0, NULL, rev, NULL);
382 rev->left_right = 1;
383 rev->first_parent_only = 1;
384 left->object.flags |= SYMMETRIC_LEFT;
385 add_pending_object(rev, &left->object, path);
386 add_pending_object(rev, &right->object, path);
808a95dc
JN
387 for (list = merge_bases; list; list = list->next) {
388 list->item->object.flags |= UNINTERESTING;
389 add_pending_object(rev, &list->item->object,
f2fd0760 390 oid_to_hex(&list->item->object.oid));
808a95dc
JN
391 }
392 return prepare_revision_walk(rev);
393}
394
395static void print_submodule_summary(struct rev_info *rev, FILE *f,
0f33a067 396 const char *line_prefix,
808a95dc
JN
397 const char *del, const char *add, const char *reset)
398{
399 static const char format[] = " %m %s";
400 struct strbuf sb = STRBUF_INIT;
401 struct commit *commit;
402
403 while ((commit = get_revision(rev))) {
404 struct pretty_print_context ctx = {0};
405 ctx.date_mode = rev->date_mode;
ecaee805 406 ctx.output_encoding = get_log_output_encoding();
808a95dc 407 strbuf_setlen(&sb, 0);
0f33a067 408 strbuf_addstr(&sb, line_prefix);
808a95dc
JN
409 if (commit->object.flags & SYMMETRIC_LEFT) {
410 if (del)
411 strbuf_addstr(&sb, del);
412 }
413 else if (add)
414 strbuf_addstr(&sb, add);
415 format_commit_message(commit, format, &sb, &ctx);
416 if (reset)
417 strbuf_addstr(&sb, reset);
418 strbuf_addch(&sb, '\n');
419 fprintf(f, "%s", sb.buf);
420 }
421 strbuf_release(&sb);
422}
423
6cd5757c
SB
424static void prepare_submodule_repo_env_no_git_dir(struct argv_array *out)
425{
426 const char * const *var;
427
428 for (var = local_repo_env; *var; var++) {
429 if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
430 argv_array_push(out, *var);
431 }
432}
433
434void prepare_submodule_repo_env(struct argv_array *out)
435{
436 prepare_submodule_repo_env_no_git_dir(out);
437 argv_array_pushf(out, "%s=%s", GIT_DIR_ENVIRONMENT,
438 DEFAULT_GIT_DIR_ENVIRONMENT);
439}
440
8e6df650
JK
441/* Helper function to display the submodule header line prior to the full
442 * summary output. If it can locate the submodule objects directory it will
443 * attempt to lookup both the left and right commits and put them into the
444 * left and right pointers.
445 */
446static void show_submodule_header(FILE *f, const char *path,
0f33a067 447 const char *line_prefix,
602a283a 448 struct object_id *one, struct object_id *two,
4e215131 449 unsigned dirty_submodule, const char *meta,
8e6df650
JK
450 const char *reset,
451 struct commit **left, struct commit **right,
452 struct commit_list **merge_bases)
752c0c24 453{
752c0c24
JS
454 const char *message = NULL;
455 struct strbuf sb = STRBUF_INIT;
752c0c24
JS
456 int fast_forward = 0, fast_backward = 0;
457
c7e1a736 458 if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
0f33a067
JK
459 fprintf(f, "%sSubmodule %s contains untracked content\n",
460 line_prefix, path);
c7e1a736 461 if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
0f33a067
JK
462 fprintf(f, "%sSubmodule %s contains modified content\n",
463 line_prefix, path);
c7e1a736 464
8e6df650
JK
465 if (is_null_oid(one))
466 message = "(new submodule)";
467 else if (is_null_oid(two))
468 message = "(submodule deleted)";
469
470 if (add_submodule_odb(path)) {
471 if (!message)
472 message = "(not initialized)";
473 goto output_header;
474 }
475
476 /*
477 * Attempt to lookup the commit references, and determine if this is
478 * a fast forward or fast backwards update.
479 */
480 *left = lookup_commit_reference(one->hash);
481 *right = lookup_commit_reference(two->hash);
482
483 /*
484 * Warn about missing commits in the submodule project, but only if
485 * they aren't null.
486 */
487 if ((!is_null_oid(one) && !*left) ||
488 (!is_null_oid(two) && !*right))
489 message = "(commits not present)";
490
491 *merge_bases = get_merge_bases(*left, *right);
492 if (*merge_bases) {
493 if ((*merge_bases)->item == *left)
494 fast_forward = 1;
495 else if ((*merge_bases)->item == *right)
496 fast_backward = 1;
497 }
498
602a283a 499 if (!oidcmp(one, two)) {
c7e1a736
JL
500 strbuf_release(&sb);
501 return;
502 }
503
8e6df650 504output_header:
a94bb683 505 strbuf_addf(&sb, "%s%sSubmodule %s ", line_prefix, meta, path);
69e65449 506 strbuf_add_unique_abbrev(&sb, one->hash, DEFAULT_ABBREV);
a94bb683 507 strbuf_addstr(&sb, (fast_backward || fast_forward) ? ".." : "...");
f0798e6c 508 strbuf_add_unique_abbrev(&sb, two->hash, DEFAULT_ABBREV);
752c0c24 509 if (message)
4e215131 510 strbuf_addf(&sb, " %s%s\n", message, reset);
752c0c24 511 else
4e215131 512 strbuf_addf(&sb, "%s:%s\n", fast_backward ? " (rewind)" : "", reset);
752c0c24
JS
513 fwrite(sb.buf, sb.len, 1, f);
514
752c0c24
JS
515 strbuf_release(&sb);
516}
ee6fc514 517
8e6df650
JK
518void show_submodule_summary(FILE *f, const char *path,
519 const char *line_prefix,
520 struct object_id *one, struct object_id *two,
521 unsigned dirty_submodule, const char *meta,
522 const char *del, const char *add, const char *reset)
523{
524 struct rev_info rev;
525 struct commit *left = NULL, *right = NULL;
526 struct commit_list *merge_bases = NULL;
527
528 show_submodule_header(f, path, line_prefix, one, two, dirty_submodule,
529 meta, reset, &left, &right, &merge_bases);
530
531 /*
532 * If we don't have both a left and a right pointer, there is no
533 * reason to try and display a summary. The header line should contain
534 * all the information the user needs.
535 */
536 if (!left || !right)
537 goto out;
538
539 /* Treat revision walker failure the same as missing commits */
540 if (prepare_submodule_summary(&rev, path, left, right, merge_bases)) {
541 fprintf(f, "%s(revision walker failed)\n", line_prefix);
542 goto out;
543 }
544
545 print_submodule_summary(&rev, f, line_prefix, del, add, reset);
546
547out:
548 if (merge_bases)
549 free_commit_list(merge_bases);
550 clear_commit_marks(left, ~0);
551 clear_commit_marks(right, ~0);
552}
553
fd47ae6a
JK
554void show_submodule_inline_diff(FILE *f, const char *path,
555 const char *line_prefix,
556 struct object_id *one, struct object_id *two,
557 unsigned dirty_submodule, const char *meta,
558 const char *del, const char *add, const char *reset,
559 const struct diff_options *o)
560{
561 const struct object_id *old = &empty_tree_oid, *new = &empty_tree_oid;
562 struct commit *left = NULL, *right = NULL;
563 struct commit_list *merge_bases = NULL;
564 struct strbuf submodule_dir = STRBUF_INIT;
565 struct child_process cp = CHILD_PROCESS_INIT;
566
567 show_submodule_header(f, path, line_prefix, one, two, dirty_submodule,
568 meta, reset, &left, &right, &merge_bases);
569
570 /* We need a valid left and right commit to display a difference */
571 if (!(left || is_null_oid(one)) ||
572 !(right || is_null_oid(two)))
573 goto done;
574
575 if (left)
576 old = one;
577 if (right)
578 new = two;
579
580 fflush(f);
581 cp.git_cmd = 1;
582 cp.dir = path;
583 cp.out = dup(fileno(f));
584 cp.no_stdin = 1;
585
586 /* TODO: other options may need to be passed here. */
587 argv_array_push(&cp.args, "diff");
588 argv_array_pushf(&cp.args, "--line-prefix=%s", line_prefix);
589 if (DIFF_OPT_TST(o, REVERSE_DIFF)) {
590 argv_array_pushf(&cp.args, "--src-prefix=%s%s/",
591 o->b_prefix, path);
592 argv_array_pushf(&cp.args, "--dst-prefix=%s%s/",
593 o->a_prefix, path);
594 } else {
595 argv_array_pushf(&cp.args, "--src-prefix=%s%s/",
596 o->a_prefix, path);
597 argv_array_pushf(&cp.args, "--dst-prefix=%s%s/",
598 o->b_prefix, path);
599 }
600 argv_array_push(&cp.args, oid_to_hex(old));
601 /*
602 * If the submodule has modified content, we will diff against the
603 * work tree, under the assumption that the user has asked for the
604 * diff format and wishes to actually see all differences even if they
605 * haven't yet been committed to the submodule yet.
606 */
607 if (!(dirty_submodule & DIRTY_SUBMODULE_MODIFIED))
608 argv_array_push(&cp.args, oid_to_hex(new));
609
17b254cd 610 prepare_submodule_repo_env(&cp.env_array);
fd47ae6a
JK
611 if (run_command(&cp))
612 fprintf(f, "(diff failed)\n");
613
614done:
615 strbuf_release(&submodule_dir);
616 if (merge_bases)
617 free_commit_list(merge_bases);
618 if (left)
619 clear_commit_marks(left, ~0);
620 if (right)
621 clear_commit_marks(right, ~0);
622}
623
be254a0e
JL
624void set_config_fetch_recurse_submodules(int value)
625{
626 config_fetch_recurse_submodules = value;
627}
628
cf055e46
SB
629void set_config_update_recurse_submodules(int value)
630{
631 config_update_recurse_submodules = value;
632}
633
84f8925e
SB
634int should_update_submodules(void)
635{
636 return config_update_recurse_submodules == RECURSE_SUBMODULES_ON;
637}
638
639const struct submodule *submodule_from_ce(const struct cache_entry *ce)
640{
641 if (!S_ISGITLINK(ce->ce_mode))
642 return NULL;
643
644 if (!should_update_submodules())
645 return NULL;
646
647 return submodule_from_path(null_sha1, ce->name);
648}
649
7290ef58
MH
650static int has_remote(const char *refname, const struct object_id *oid,
651 int flags, void *cb_data)
d2b17b32
FG
652{
653 return 1;
654}
655
1b7ba794 656static int append_oid_to_argv(const struct object_id *oid, void *data)
d2b17b32 657{
9cfa1c26 658 struct argv_array *argv = data;
1b7ba794 659 argv_array_push(argv, oid_to_hex(oid));
9cfa1c26
HV
660 return 0;
661}
662
1b7ba794 663static int check_has_commit(const struct object_id *oid, void *data)
d2b17b32 664{
5b6607d2
HV
665 int *has_commit = data;
666
1b7ba794 667 if (!lookup_commit_reference(oid->hash))
5b6607d2
HV
668 *has_commit = 0;
669
670 return 0;
671}
672
910650d2 673static int submodule_has_commits(const char *path, struct oid_array *commits)
5b6607d2
HV
674{
675 int has_commit = 1;
676
677 if (add_submodule_odb(path))
678 return 0;
679
910650d2 680 oid_array_for_each_unique(commits, check_has_commit, &has_commit);
5b6607d2
HV
681 return has_commit;
682}
683
910650d2 684static int submodule_needs_pushing(const char *path, struct oid_array *commits)
5b6607d2
HV
685{
686 if (!submodule_has_commits(path, commits))
250ab24a
HV
687 /*
688 * NOTE: We do consider it safe to return "no" here. The
689 * correct answer would be "We do not know" instead of
690 * "No push needed", but it is quite hard to change
691 * the submodule pointer without having the submodule
692 * around. If a user did however change the submodules
693 * without having the submodule around, this indicates
694 * an expert who knows what they are doing or a
695 * maintainer integrating work from other people. In
696 * both cases it should be safe to skip this check.
697 */
d2b17b32
FG
698 return 0;
699
700 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
d3180279 701 struct child_process cp = CHILD_PROCESS_INIT;
d2b17b32
FG
702 struct strbuf buf = STRBUF_INIT;
703 int needs_pushing = 0;
704
5b6607d2 705 argv_array_push(&cp.args, "rev-list");
910650d2 706 oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args);
5b6607d2
HV
707 argv_array_pushl(&cp.args, "--not", "--remotes", "-n", "1" , NULL);
708
c12e8656 709 prepare_submodule_repo_env(&cp.env_array);
d2b17b32
FG
710 cp.git_cmd = 1;
711 cp.no_stdin = 1;
712 cp.out = -1;
713 cp.dir = path;
714 if (start_command(&cp))
5b6607d2
HV
715 die("Could not run 'git rev-list <commits> --not --remotes -n 1' command in submodule %s",
716 path);
d2b17b32
FG
717 if (strbuf_read(&buf, cp.out, 41))
718 needs_pushing = 1;
719 finish_command(&cp);
720 close(cp.out);
721 strbuf_release(&buf);
722 return needs_pushing;
723 }
724
725 return 0;
726}
727
910650d2 728static struct oid_array *submodule_commits(struct string_list *submodules,
14739447
HV
729 const char *path)
730{
731 struct string_list_item *item;
732
733 item = string_list_insert(submodules, path);
734 if (item->util)
910650d2 735 return (struct oid_array *) item->util;
14739447 736
910650d2 737 /* NEEDSWORK: should we have oid_array_init()? */
738 item->util = xcalloc(1, sizeof(struct oid_array));
739 return (struct oid_array *) item->util;
14739447
HV
740}
741
d2b17b32
FG
742static void collect_submodules_from_diff(struct diff_queue_struct *q,
743 struct diff_options *options,
744 void *data)
745{
746 int i;
14739447 747 struct string_list *submodules = data;
d2b17b32
FG
748
749 for (i = 0; i < q->nr; i++) {
750 struct diff_filepair *p = q->queue[i];
910650d2 751 struct oid_array *commits;
d2b17b32
FG
752 if (!S_ISGITLINK(p->two->mode))
753 continue;
14739447 754 commits = submodule_commits(submodules, p->two->path);
910650d2 755 oid_array_append(commits, &p->two->oid);
d2b17b32
FG
756 }
757}
758
a762e51e
HV
759static void find_unpushed_submodule_commits(struct commit *commit,
760 struct string_list *needs_pushing)
d2b17b32 761{
d2b17b32
FG
762 struct rev_info rev;
763
d2b17b32
FG
764 init_revisions(&rev, NULL);
765 rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
766 rev.diffopt.format_callback = collect_submodules_from_diff;
767 rev.diffopt.format_callback_data = needs_pushing;
78e98eaf 768 diff_tree_combined_merge(commit, 1, &rev);
d2b17b32
FG
769}
770
14739447
HV
771static void free_submodules_sha1s(struct string_list *submodules)
772{
773 struct string_list_item *item;
774 for_each_string_list_item(item, submodules)
910650d2 775 oid_array_clear((struct oid_array *) item->util);
14739447
HV
776 string_list_clear(submodules, 1);
777}
778
910650d2 779int find_unpushed_submodules(struct oid_array *commits,
a762e51e 780 const char *remotes_name, struct string_list *needs_pushing)
d2b17b32
FG
781{
782 struct rev_info rev;
783 struct commit *commit;
14739447
HV
784 struct string_list submodules = STRING_LIST_INIT_DUP;
785 struct string_list_item *submodule;
9cfa1c26 786 struct argv_array argv = ARGV_ARRAY_INIT;
a762e51e 787
d2b17b32 788 init_revisions(&rev, NULL);
9cfa1c26
HV
789
790 /* argv.argv[0] will be ignored by setup_revisions */
791 argv_array_push(&argv, "find_unpushed_submodules");
910650d2 792 oid_array_for_each_unique(commits, append_oid_to_argv, &argv);
9cfa1c26
HV
793 argv_array_push(&argv, "--not");
794 argv_array_pushf(&argv, "--remotes=%s", remotes_name);
795
796 setup_revisions(argv.argc, argv.argv, &rev, NULL);
d2b17b32
FG
797 if (prepare_revision_walk(&rev))
798 die("revision walk setup failed");
799
a762e51e 800 while ((commit = get_revision(&rev)) != NULL)
14739447 801 find_unpushed_submodule_commits(commit, &submodules);
d2b17b32 802
bcc0a3ea 803 reset_revision_walk();
9cfa1c26 804 argv_array_clear(&argv);
d2b17b32 805
14739447 806 for_each_string_list_item(submodule, &submodules) {
910650d2 807 struct oid_array *commits = (struct oid_array *) submodule->util;
5b6607d2
HV
808
809 if (submodule_needs_pushing(submodule->string, commits))
810 string_list_insert(needs_pushing, submodule->string);
14739447
HV
811 }
812 free_submodules_sha1s(&submodules);
d2b17b32 813
a762e51e 814 return needs_pushing->nr;
d2b17b32
FG
815}
816
2a90556d 817static int push_submodule(const char *path,
06bf4ad1
BW
818 const struct remote *remote,
819 const char **refspec, int refspec_nr,
2a90556d
BW
820 const struct string_list *push_options,
821 int dry_run)
eb21c732
HV
822{
823 if (add_submodule_odb(path))
824 return 1;
825
826 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
d3180279 827 struct child_process cp = CHILD_PROCESS_INIT;
0301c821
BW
828 argv_array_push(&cp.args, "push");
829 if (dry_run)
830 argv_array_push(&cp.args, "--dry-run");
eb21c732 831
2a90556d
BW
832 if (push_options && push_options->nr) {
833 const struct string_list_item *item;
834 for_each_string_list_item(item, push_options)
835 argv_array_pushf(&cp.args, "--push-option=%s",
836 item->string);
837 }
06bf4ad1
BW
838
839 if (remote->origin != REMOTE_UNCONFIGURED) {
840 int i;
841 argv_array_push(&cp.args, remote->name);
842 for (i = 0; i < refspec_nr; i++)
843 argv_array_push(&cp.args, refspec[i]);
844 }
845
c12e8656 846 prepare_submodule_repo_env(&cp.env_array);
eb21c732
HV
847 cp.git_cmd = 1;
848 cp.no_stdin = 1;
849 cp.dir = path;
850 if (run_command(&cp))
851 return 0;
852 close(cp.out);
853 }
854
855 return 1;
856}
857
06bf4ad1
BW
858/*
859 * Perform a check in the submodule to see if the remote and refspec work.
860 * Die if the submodule can't be pushed.
861 */
862static void submodule_push_check(const char *path, const struct remote *remote,
863 const char **refspec, int refspec_nr)
864{
865 struct child_process cp = CHILD_PROCESS_INIT;
866 int i;
867
868 argv_array_push(&cp.args, "submodule--helper");
869 argv_array_push(&cp.args, "push-check");
870 argv_array_push(&cp.args, remote->name);
871
872 for (i = 0; i < refspec_nr; i++)
873 argv_array_push(&cp.args, refspec[i]);
874
875 prepare_submodule_repo_env(&cp.env_array);
876 cp.git_cmd = 1;
877 cp.no_stdin = 1;
878 cp.no_stdout = 1;
879 cp.dir = path;
880
881 /*
882 * Simply indicate if 'submodule--helper push-check' failed.
883 * More detailed error information will be provided by the
884 * child process.
885 */
886 if (run_command(&cp))
887 die("process for submodule '%s' failed", path);
888}
889
910650d2 890int push_unpushed_submodules(struct oid_array *commits,
06bf4ad1
BW
891 const struct remote *remote,
892 const char **refspec, int refspec_nr,
2a90556d 893 const struct string_list *push_options,
0301c821 894 int dry_run)
eb21c732
HV
895{
896 int i, ret = 1;
f93d7c6f 897 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
eb21c732 898
06bf4ad1 899 if (!find_unpushed_submodules(commits, remote->name, &needs_pushing))
eb21c732
HV
900 return 1;
901
06bf4ad1
BW
902 /*
903 * Verify that the remote and refspec can be propagated to all
904 * submodules. This check can be skipped if the remote and refspec
905 * won't be propagated due to the remote being unconfigured (e.g. a URL
906 * instead of a remote name).
907 */
908 if (remote->origin != REMOTE_UNCONFIGURED)
909 for (i = 0; i < needs_pushing.nr; i++)
910 submodule_push_check(needs_pushing.items[i].string,
911 remote, refspec, refspec_nr);
912
913 /* Actually push the submodules */
eb21c732
HV
914 for (i = 0; i < needs_pushing.nr; i++) {
915 const char *path = needs_pushing.items[i].string;
916 fprintf(stderr, "Pushing submodule '%s'\n", path);
06bf4ad1
BW
917 if (!push_submodule(path, remote, refspec, refspec_nr,
918 push_options, dry_run)) {
eb21c732
HV
919 fprintf(stderr, "Unable to push submodule '%s'\n", path);
920 ret = 0;
921 }
922 }
923
924 string_list_clear(&needs_pushing, 0);
925
926 return ret;
927}
928
c16c3e40
JL
929static int is_submodule_commit_present(const char *path, unsigned char sha1[20])
930{
931 int is_present = 0;
932 if (!add_submodule_odb(path) && lookup_commit_reference(sha1)) {
933 /* Even if the submodule is checked out and the commit is
934 * present, make sure it is reachable from a ref. */
d3180279 935 struct child_process cp = CHILD_PROCESS_INIT;
c16c3e40
JL
936 const char *argv[] = {"rev-list", "-n", "1", NULL, "--not", "--all", NULL};
937 struct strbuf buf = STRBUF_INIT;
938
939 argv[3] = sha1_to_hex(sha1);
c16c3e40 940 cp.argv = argv;
c12e8656 941 prepare_submodule_repo_env(&cp.env_array);
c16c3e40
JL
942 cp.git_cmd = 1;
943 cp.no_stdin = 1;
c16c3e40 944 cp.dir = path;
1d4974c9 945 if (!capture_command(&cp, &buf, 1024) && !buf.len)
c16c3e40
JL
946 is_present = 1;
947
c16c3e40
JL
948 strbuf_release(&buf);
949 }
950 return is_present;
951}
952
88a21979
JL
953static void submodule_collect_changed_cb(struct diff_queue_struct *q,
954 struct diff_options *options,
955 void *data)
956{
957 int i;
958 for (i = 0; i < q->nr; i++) {
959 struct diff_filepair *p = q->queue[i];
960 if (!S_ISGITLINK(p->two->mode))
961 continue;
962
963 if (S_ISGITLINK(p->one->mode)) {
964 /* NEEDSWORK: We should honor the name configured in
965 * the .gitmodules file of the commit we are examining
966 * here to be able to correctly follow submodules
967 * being moved around. */
968 struct string_list_item *path;
969 path = unsorted_string_list_lookup(&changed_submodule_paths, p->two->path);
a0d12c44 970 if (!path && !is_submodule_commit_present(p->two->path, p->two->oid.hash))
88a21979
JL
971 string_list_append(&changed_submodule_paths, xstrdup(p->two->path));
972 } else {
973 /* Submodule is new or was moved here */
974 /* NEEDSWORK: When the .git directories of submodules
975 * live inside the superprojects .git directory some
976 * day we should fetch new submodules directly into
977 * that location too when config or options request
978 * that so they can be checked out from there. */
979 continue;
980 }
981 }
982}
983
7290ef58 984static int add_sha1_to_array(const char *ref, const struct object_id *oid,
6859de45
JK
985 int flags, void *data)
986{
910650d2 987 oid_array_append(data, oid);
6859de45
JK
988 return 0;
989}
990
2eb80bcd 991void check_for_new_submodule_commits(struct object_id *oid)
6859de45
JK
992{
993 if (!initialized_fetch_ref_tips) {
994 for_each_ref(add_sha1_to_array, &ref_tips_before_fetch);
995 initialized_fetch_ref_tips = 1;
996 }
997
910650d2 998 oid_array_append(&ref_tips_after_fetch, oid);
6859de45
JK
999}
1000
1b7ba794 1001static int add_oid_to_argv(const struct object_id *oid, void *data)
6859de45 1002{
1b7ba794 1003 argv_array_push(data, oid_to_hex(oid));
16ddcd40 1004 return 0;
6859de45
JK
1005}
1006
1007static void calculate_changed_submodule_paths(void)
88a21979
JL
1008{
1009 struct rev_info rev;
1010 struct commit *commit;
c1189cae 1011 struct argv_array argv = ARGV_ARRAY_INIT;
88a21979 1012
18322bad 1013 /* No need to check if there are no submodules configured */
851e18c3 1014 if (!submodule_from_path(NULL, NULL))
18322bad
JL
1015 return;
1016
88a21979 1017 init_revisions(&rev, NULL);
c1189cae 1018 argv_array_push(&argv, "--"); /* argv[0] program name */
910650d2 1019 oid_array_for_each_unique(&ref_tips_after_fetch,
1b7ba794 1020 add_oid_to_argv, &argv);
c1189cae 1021 argv_array_push(&argv, "--not");
910650d2 1022 oid_array_for_each_unique(&ref_tips_before_fetch,
1b7ba794 1023 add_oid_to_argv, &argv);
6859de45 1024 setup_revisions(argv.argc, argv.argv, &rev, NULL);
88a21979
JL
1025 if (prepare_revision_walk(&rev))
1026 die("revision walk setup failed");
1027
1028 /*
1029 * Collect all submodules (whether checked out or not) for which new
1030 * commits have been recorded upstream in "changed_submodule_paths".
1031 */
1032 while ((commit = get_revision(&rev))) {
1033 struct commit_list *parent = commit->parents;
1034 while (parent) {
1035 struct diff_options diff_opts;
1036 diff_setup(&diff_opts);
ea2d325b 1037 DIFF_OPT_SET(&diff_opts, RECURSIVE);
88a21979
JL
1038 diff_opts.output_format |= DIFF_FORMAT_CALLBACK;
1039 diff_opts.format_callback = submodule_collect_changed_cb;
28452655 1040 diff_setup_done(&diff_opts);
ed1c9977 1041 diff_tree_sha1(parent->item->object.oid.hash, commit->object.oid.hash, "", &diff_opts);
88a21979
JL
1042 diffcore_std(&diff_opts);
1043 diff_flush(&diff_opts);
1044 parent = parent->next;
1045 }
1046 }
6859de45 1047
c1189cae 1048 argv_array_clear(&argv);
910650d2 1049 oid_array_clear(&ref_tips_before_fetch);
1050 oid_array_clear(&ref_tips_after_fetch);
6859de45 1051 initialized_fetch_ref_tips = 0;
88a21979
JL
1052}
1053
fe85ee6e
SB
1054struct submodule_parallel_fetch {
1055 int count;
1056 struct argv_array args;
1057 const char *work_tree;
1058 const char *prefix;
1059 int command_line_option;
1060 int quiet;
1061 int result;
1062};
1063#define SPF_INIT {0, ARGV_ARRAY_INIT, NULL, NULL, 0, 0, 0}
1064
1065static int get_next_submodule(struct child_process *cp,
1066 struct strbuf *err, void *data, void **task_cb)
7dce19d3 1067{
fe85ee6e
SB
1068 int ret = 0;
1069 struct submodule_parallel_fetch *spf = data;
6859de45 1070
fe85ee6e 1071 for (; spf->count < active_nr; spf->count++) {
7dce19d3
JL
1072 struct strbuf submodule_path = STRBUF_INIT;
1073 struct strbuf submodule_git_dir = STRBUF_INIT;
1074 struct strbuf submodule_prefix = STRBUF_INIT;
fe85ee6e 1075 const struct cache_entry *ce = active_cache[spf->count];
851e18c3
HV
1076 const char *git_dir, *default_argv;
1077 const struct submodule *submodule;
7dce19d3
JL
1078
1079 if (!S_ISGITLINK(ce->ce_mode))
1080 continue;
1081
851e18c3
HV
1082 submodule = submodule_from_path(null_sha1, ce->name);
1083 if (!submodule)
1084 submodule = submodule_from_name(null_sha1, ce->name);
7dce19d3 1085
88a21979 1086 default_argv = "yes";
fe85ee6e 1087 if (spf->command_line_option == RECURSE_SUBMODULES_DEFAULT) {
851e18c3
HV
1088 if (submodule &&
1089 submodule->fetch_recurse !=
1090 RECURSE_SUBMODULES_NONE) {
1091 if (submodule->fetch_recurse ==
1092 RECURSE_SUBMODULES_OFF)
c1a3c364 1093 continue;
851e18c3
HV
1094 if (submodule->fetch_recurse ==
1095 RECURSE_SUBMODULES_ON_DEMAND) {
bf42b384
JL
1096 if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
1097 continue;
1098 default_argv = "on-demand";
1099 }
c1a3c364 1100 } else {
d4e98b58
JL
1101 if ((config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF) ||
1102 gitmodules_is_unmerged)
c1a3c364 1103 continue;
88a21979
JL
1104 if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) {
1105 if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
1106 continue;
1107 default_argv = "on-demand";
1108 }
c1a3c364 1109 }
fe85ee6e 1110 } else if (spf->command_line_option == RECURSE_SUBMODULES_ON_DEMAND) {
8f0700dd
JL
1111 if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
1112 continue;
1113 default_argv = "on-demand";
be254a0e
JL
1114 }
1115
fe85ee6e 1116 strbuf_addf(&submodule_path, "%s/%s", spf->work_tree, ce->name);
7dce19d3 1117 strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
fe85ee6e 1118 strbuf_addf(&submodule_prefix, "%s%s/", spf->prefix, ce->name);
13d6ec91 1119 git_dir = read_gitfile(submodule_git_dir.buf);
7dce19d3
JL
1120 if (!git_dir)
1121 git_dir = submodule_git_dir.buf;
1122 if (is_directory(git_dir)) {
fe85ee6e
SB
1123 child_process_init(cp);
1124 cp->dir = strbuf_detach(&submodule_path, NULL);
c12e8656 1125 prepare_submodule_repo_env(&cp->env_array);
fe85ee6e
SB
1126 cp->git_cmd = 1;
1127 if (!spf->quiet)
1128 strbuf_addf(err, "Fetching submodule %s%s\n",
1129 spf->prefix, ce->name);
1130 argv_array_init(&cp->args);
1131 argv_array_pushv(&cp->args, spf->args.argv);
1132 argv_array_push(&cp->args, default_argv);
1133 argv_array_push(&cp->args, "--submodule-prefix");
1134 argv_array_push(&cp->args, submodule_prefix.buf);
1135 ret = 1;
7dce19d3
JL
1136 }
1137 strbuf_release(&submodule_path);
1138 strbuf_release(&submodule_git_dir);
1139 strbuf_release(&submodule_prefix);
fe85ee6e
SB
1140 if (ret) {
1141 spf->count++;
1142 return 1;
1143 }
7dce19d3 1144 }
fe85ee6e
SB
1145 return 0;
1146}
1147
2a73b3da 1148static int fetch_start_failure(struct strbuf *err,
fe85ee6e
SB
1149 void *cb, void *task_cb)
1150{
1151 struct submodule_parallel_fetch *spf = cb;
1152
1153 spf->result = 1;
1154
1155 return 0;
1156}
1157
2a73b3da
SB
1158static int fetch_finish(int retvalue, struct strbuf *err,
1159 void *cb, void *task_cb)
fe85ee6e
SB
1160{
1161 struct submodule_parallel_fetch *spf = cb;
1162
1163 if (retvalue)
1164 spf->result = 1;
1165
1166 return 0;
1167}
1168
1169int fetch_populated_submodules(const struct argv_array *options,
1170 const char *prefix, int command_line_option,
62104ba1 1171 int quiet, int max_parallel_jobs)
fe85ee6e
SB
1172{
1173 int i;
fe85ee6e
SB
1174 struct submodule_parallel_fetch spf = SPF_INIT;
1175
1176 spf.work_tree = get_git_work_tree();
1177 spf.command_line_option = command_line_option;
1178 spf.quiet = quiet;
1179 spf.prefix = prefix;
1180
1181 if (!spf.work_tree)
1182 goto out;
1183
1184 if (read_cache() < 0)
1185 die("index file corrupt");
1186
1187 argv_array_push(&spf.args, "fetch");
1188 for (i = 0; i < options->argc; i++)
1189 argv_array_push(&spf.args, options->argv[i]);
1190 argv_array_push(&spf.args, "--recurse-submodules-default");
1191 /* default value, "--submodule-prefix" and its value are added later */
1192
a028a193
SB
1193 if (max_parallel_jobs < 0)
1194 max_parallel_jobs = parallel_jobs;
1195
fe85ee6e
SB
1196 calculate_changed_submodule_paths();
1197 run_processes_parallel(max_parallel_jobs,
1198 get_next_submodule,
1199 fetch_start_failure,
1200 fetch_finish,
1201 &spf);
1202
1203 argv_array_clear(&spf.args);
88a21979
JL
1204out:
1205 string_list_clear(&changed_submodule_paths, 1);
fe85ee6e 1206 return spf.result;
7dce19d3
JL
1207}
1208
3bfc4504 1209unsigned is_submodule_modified(const char *path, int ignore_untracked)
ee6fc514 1210{
d3180279 1211 struct child_process cp = CHILD_PROCESS_INIT;
ee6fc514 1212 struct strbuf buf = STRBUF_INIT;
af6865a7 1213 FILE *fp;
c7e1a736 1214 unsigned dirty_submodule = 0;
eee49b6c 1215 const char *git_dir;
af6865a7 1216 int ignore_cp_exit_code = 0;
ee6fc514 1217
eee49b6c 1218 strbuf_addf(&buf, "%s/.git", path);
13d6ec91 1219 git_dir = read_gitfile(buf.buf);
eee49b6c
JL
1220 if (!git_dir)
1221 git_dir = buf.buf;
5c896f7c
SB
1222 if (!is_git_directory(git_dir)) {
1223 if (is_directory(git_dir))
1224 die(_("'%s' not recognized as a git repository"), git_dir);
ee6fc514
JL
1225 strbuf_release(&buf);
1226 /* The submodule is not checked out, so it is not modified */
1227 return 0;
ee6fc514
JL
1228 }
1229 strbuf_reset(&buf);
1230
fcecf0b9 1231 argv_array_pushl(&cp.args, "status", "--porcelain=2", NULL);
3bfc4504 1232 if (ignore_untracked)
d0d7fed1 1233 argv_array_push(&cp.args, "-uno");
3bfc4504 1234
c12e8656 1235 prepare_submodule_repo_env(&cp.env_array);
ee6fc514
JL
1236 cp.git_cmd = 1;
1237 cp.no_stdin = 1;
1238 cp.out = -1;
eee49b6c 1239 cp.dir = path;
ee6fc514 1240 if (start_command(&cp))
fcecf0b9 1241 die("Could not run 'git status --porcelain=2' in submodule %s", path);
ee6fc514 1242
af6865a7
SB
1243 fp = xfdopen(cp.out, "r");
1244 while (strbuf_getwholeline(&buf, fp, '\n') != EOF) {
fcecf0b9
SB
1245 /* regular untracked files */
1246 if (buf.buf[0] == '?')
c7e1a736 1247 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
40069d6e
SB
1248
1249 if (buf.buf[0] == 'u' ||
1250 buf.buf[0] == '1' ||
1251 buf.buf[0] == '2') {
1252 /* T = line type, XY = status, SSSS = submodule state */
1253 if (buf.len < strlen("T XY SSSS"))
1254 die("BUG: invalid status --porcelain=2 line %s",
1255 buf.buf);
1256
1257 if (buf.buf[5] == 'S' && buf.buf[8] == 'U')
1258 /* nested untracked file */
1259 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
1260
1261 if (buf.buf[0] == 'u' ||
1262 buf.buf[0] == '2' ||
1263 memcmp(buf.buf + 5, "S..U", 4))
1264 /* other change */
1265 dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
c7e1a736 1266 }
64f9a946
SB
1267
1268 if ((dirty_submodule & DIRTY_SUBMODULE_MODIFIED) &&
1269 ((dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ||
af6865a7
SB
1270 ignore_untracked)) {
1271 /*
1272 * We're not interested in any further information from
1273 * the child any more, neither output nor its exit code.
1274 */
1275 ignore_cp_exit_code = 1;
c7e1a736 1276 break;
af6865a7 1277 }
c7e1a736 1278 }
af6865a7 1279 fclose(fp);
ee6fc514 1280
af6865a7 1281 if (finish_command(&cp) && !ignore_cp_exit_code)
fcecf0b9 1282 die("'git status --porcelain=2' failed in submodule %s", path);
ee6fc514 1283
ee6fc514 1284 strbuf_release(&buf);
c7e1a736 1285 return dirty_submodule;
ee6fc514 1286}
68d03e4a 1287
293ab15e
JL
1288int submodule_uses_gitfile(const char *path)
1289{
d3180279 1290 struct child_process cp = CHILD_PROCESS_INIT;
293ab15e
JL
1291 const char *argv[] = {
1292 "submodule",
1293 "foreach",
1294 "--quiet",
1295 "--recursive",
1296 "test -f .git",
1297 NULL,
1298 };
1299 struct strbuf buf = STRBUF_INIT;
1300 const char *git_dir;
1301
1302 strbuf_addf(&buf, "%s/.git", path);
1303 git_dir = read_gitfile(buf.buf);
1304 if (!git_dir) {
1305 strbuf_release(&buf);
1306 return 0;
1307 }
1308 strbuf_release(&buf);
1309
1310 /* Now test that all nested submodules use a gitfile too */
293ab15e 1311 cp.argv = argv;
c12e8656 1312 prepare_submodule_repo_env(&cp.env_array);
293ab15e
JL
1313 cp.git_cmd = 1;
1314 cp.no_stdin = 1;
1315 cp.no_stderr = 1;
1316 cp.no_stdout = 1;
1317 cp.dir = path;
1318 if (run_command(&cp))
1319 return 0;
1320
1321 return 1;
1322}
1323
83b76966
SB
1324/*
1325 * Check if it is a bad idea to remove a submodule, i.e. if we'd lose data
1326 * when doing so.
1327 *
1328 * Return 1 if we'd lose data, return 0 if the removal is fine,
1329 * and negative values for errors.
1330 */
1331int bad_to_remove_submodule(const char *path, unsigned flags)
293ab15e 1332{
293ab15e 1333 ssize_t len;
d3180279 1334 struct child_process cp = CHILD_PROCESS_INIT;
293ab15e 1335 struct strbuf buf = STRBUF_INIT;
83b76966 1336 int ret = 0;
293ab15e 1337
dbe44faa 1338 if (!file_exists(path) || is_empty_dir(path))
83b76966 1339 return 0;
293ab15e
JL
1340
1341 if (!submodule_uses_gitfile(path))
83b76966 1342 return 1;
293ab15e 1343
83b76966 1344 argv_array_pushl(&cp.args, "status", "--porcelain",
5a1c824f 1345 "--ignore-submodules=none", NULL);
83b76966
SB
1346
1347 if (flags & SUBMODULE_REMOVAL_IGNORE_UNTRACKED)
1348 argv_array_push(&cp.args, "-uno");
1349 else
1350 argv_array_push(&cp.args, "-uall");
1351
1352 if (!(flags & SUBMODULE_REMOVAL_IGNORE_IGNORED_UNTRACKED))
1353 argv_array_push(&cp.args, "--ignored");
293ab15e 1354
c12e8656 1355 prepare_submodule_repo_env(&cp.env_array);
293ab15e
JL
1356 cp.git_cmd = 1;
1357 cp.no_stdin = 1;
1358 cp.out = -1;
1359 cp.dir = path;
83b76966
SB
1360 if (start_command(&cp)) {
1361 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
35ad44cb 1362 die(_("could not start 'git status' in submodule '%s'"),
83b76966
SB
1363 path);
1364 ret = -1;
1365 goto out;
1366 }
293ab15e
JL
1367
1368 len = strbuf_read(&buf, cp.out, 1024);
1369 if (len > 2)
83b76966 1370 ret = 1;
293ab15e
JL
1371 close(cp.out);
1372
83b76966
SB
1373 if (finish_command(&cp)) {
1374 if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
35ad44cb 1375 die(_("could not run 'git status' in submodule '%s'"),
83b76966
SB
1376 path);
1377 ret = -1;
1378 }
1379out:
293ab15e 1380 strbuf_release(&buf);
83b76966 1381 return ret;
293ab15e
JL
1382}
1383
202275b9
SB
1384static const char *get_super_prefix_or_empty(void)
1385{
1386 const char *s = get_super_prefix();
1387 if (!s)
1388 s = "";
1389 return s;
1390}
1391
6e3c1595
SB
1392static int submodule_has_dirty_index(const struct submodule *sub)
1393{
1394 struct child_process cp = CHILD_PROCESS_INIT;
1395
1396 prepare_submodule_repo_env_no_git_dir(&cp.env_array);
1397
1398 cp.git_cmd = 1;
1399 argv_array_pushl(&cp.args, "diff-index", "--quiet",
1400 "--cached", "HEAD", NULL);
1401 cp.no_stdin = 1;
1402 cp.no_stdout = 1;
1403 cp.dir = sub->path;
1404 if (start_command(&cp))
1405 die("could not recurse into submodule '%s'", sub->path);
1406
1407 return finish_command(&cp);
1408}
1409
1410static void submodule_reset_index(const char *path)
1411{
1412 struct child_process cp = CHILD_PROCESS_INIT;
1413 prepare_submodule_repo_env_no_git_dir(&cp.env_array);
1414
1415 cp.git_cmd = 1;
1416 cp.no_stdin = 1;
1417 cp.dir = path;
1418
1419 argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
1420 get_super_prefix_or_empty(), path);
1421 argv_array_pushl(&cp.args, "read-tree", "-u", "--reset", NULL);
1422
1423 argv_array_push(&cp.args, EMPTY_TREE_SHA1_HEX);
1424
1425 if (run_command(&cp))
1426 die("could not reset submodule index");
1427}
1428
1429/**
1430 * Moves a submodule at a given path from a given head to another new head.
1431 * For edge cases (a submodule coming into existence or removing a submodule)
1432 * pass NULL for old or new respectively.
1433 */
1434int submodule_move_head(const char *path,
1435 const char *old,
1436 const char *new,
1437 unsigned flags)
1438{
1439 int ret = 0;
1440 struct child_process cp = CHILD_PROCESS_INIT;
1441 const struct submodule *sub;
1442
1443 sub = submodule_from_path(null_sha1, path);
1444
1445 if (!sub)
1446 die("BUG: could not get submodule information for '%s'", path);
1447
1448 if (old && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) {
1449 /* Check if the submodule has a dirty index. */
1450 if (submodule_has_dirty_index(sub))
1451 return error(_("submodule '%s' has dirty index"), path);
1452 }
1453
1454 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1455 if (old) {
1456 if (!submodule_uses_gitfile(path))
1457 absorb_git_dir_into_superproject("", path,
1458 ABSORB_GITDIR_RECURSE_SUBMODULES);
1459 } else {
1460 struct strbuf sb = STRBUF_INIT;
1461 strbuf_addf(&sb, "%s/modules/%s",
1462 get_git_common_dir(), sub->name);
1463 connect_work_tree_and_git_dir(path, sb.buf);
1464 strbuf_release(&sb);
1465
1466 /* make sure the index is clean as well */
1467 submodule_reset_index(path);
1468 }
1469 }
1470
1471 prepare_submodule_repo_env_no_git_dir(&cp.env_array);
1472
1473 cp.git_cmd = 1;
1474 cp.no_stdin = 1;
1475 cp.dir = path;
1476
1477 argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
1478 get_super_prefix_or_empty(), path);
1479 argv_array_pushl(&cp.args, "read-tree", NULL);
1480
1481 if (flags & SUBMODULE_MOVE_HEAD_DRY_RUN)
1482 argv_array_push(&cp.args, "-n");
1483 else
1484 argv_array_push(&cp.args, "-u");
1485
1486 if (flags & SUBMODULE_MOVE_HEAD_FORCE)
1487 argv_array_push(&cp.args, "--reset");
1488 else
1489 argv_array_push(&cp.args, "-m");
1490
1491 argv_array_push(&cp.args, old ? old : EMPTY_TREE_SHA1_HEX);
1492 argv_array_push(&cp.args, new ? new : EMPTY_TREE_SHA1_HEX);
1493
1494 if (run_command(&cp)) {
1495 ret = -1;
1496 goto out;
1497 }
1498
1499 if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
1500 if (new) {
1501 struct child_process cp1 = CHILD_PROCESS_INIT;
1502 /* also set the HEAD accordingly */
1503 cp1.git_cmd = 1;
1504 cp1.no_stdin = 1;
1505 cp1.dir = path;
1506
731eb176 1507 argv_array_pushl(&cp1.args, "update-ref", "HEAD", new, NULL);
6e3c1595
SB
1508
1509 if (run_command(&cp1)) {
1510 ret = -1;
1511 goto out;
1512 }
1513 } else {
1514 struct strbuf sb = STRBUF_INIT;
1515
1516 strbuf_addf(&sb, "%s/.git", path);
1517 unlink_or_warn(sb.buf);
1518 strbuf_release(&sb);
1519
1520 if (is_empty_dir(path))
1521 rmdir_or_warn(path);
1522 }
1523 }
1524out:
1525 return ret;
1526}
1527
68d03e4a
HV
1528static int find_first_merges(struct object_array *result, const char *path,
1529 struct commit *a, struct commit *b)
1530{
1531 int i, j;
3826902d 1532 struct object_array merges = OBJECT_ARRAY_INIT;
68d03e4a
HV
1533 struct commit *commit;
1534 int contains_another;
1535
1536 char merged_revision[42];
1537 const char *rev_args[] = { "rev-list", "--merges", "--ancestry-path",
1538 "--all", merged_revision, NULL };
1539 struct rev_info revs;
1540 struct setup_revision_opt rev_opts;
1541
68d03e4a
HV
1542 memset(result, 0, sizeof(struct object_array));
1543 memset(&rev_opts, 0, sizeof(rev_opts));
1544
1545 /* get all revisions that merge commit a */
1a168e5c 1546 xsnprintf(merged_revision, sizeof(merged_revision), "^%s",
f2fd0760 1547 oid_to_hex(&a->object.oid));
68d03e4a
HV
1548 init_revisions(&revs, NULL);
1549 rev_opts.submodule = path;
94c0cc8f 1550 setup_revisions(ARRAY_SIZE(rev_args)-1, rev_args, &revs, &rev_opts);
68d03e4a
HV
1551
1552 /* save all revisions from the above list that contain b */
1553 if (prepare_revision_walk(&revs))
1554 die("revision walk setup failed");
1555 while ((commit = get_revision(&revs)) != NULL) {
1556 struct object *o = &(commit->object);
a20efee9 1557 if (in_merge_bases(b, commit))
68d03e4a
HV
1558 add_object_array(o, NULL, &merges);
1559 }
bcc0a3ea 1560 reset_revision_walk();
68d03e4a
HV
1561
1562 /* Now we've got all merges that contain a and b. Prune all
1563 * merges that contain another found merge and save them in
1564 * result.
1565 */
1566 for (i = 0; i < merges.nr; i++) {
1567 struct commit *m1 = (struct commit *) merges.objects[i].item;
1568
1569 contains_another = 0;
1570 for (j = 0; j < merges.nr; j++) {
1571 struct commit *m2 = (struct commit *) merges.objects[j].item;
a20efee9 1572 if (i != j && in_merge_bases(m2, m1)) {
68d03e4a
HV
1573 contains_another = 1;
1574 break;
1575 }
1576 }
1577
1578 if (!contains_another)
5de0c015 1579 add_object_array(merges.objects[i].item, NULL, result);
68d03e4a
HV
1580 }
1581
1582 free(merges.objects);
1583 return result->nr;
1584}
1585
1586static void print_commit(struct commit *commit)
1587{
1588 struct strbuf sb = STRBUF_INIT;
1589 struct pretty_print_context ctx = {0};
a5481a6c 1590 ctx.date_mode.type = DATE_NORMAL;
68d03e4a
HV
1591 format_commit_message(commit, " %h: %m %s", &sb, &ctx);
1592 fprintf(stderr, "%s\n", sb.buf);
1593 strbuf_release(&sb);
1594}
1595
1596#define MERGE_WARNING(path, msg) \
1597 warning("Failed to merge submodule %s (%s)", path, msg);
1598
1599int merge_submodule(unsigned char result[20], const char *path,
1600 const unsigned char base[20], const unsigned char a[20],
80988783 1601 const unsigned char b[20], int search)
68d03e4a
HV
1602{
1603 struct commit *commit_base, *commit_a, *commit_b;
1604 int parent_count;
1605 struct object_array merges;
1606
1607 int i;
1608
1609 /* store a in result in case we fail */
1610 hashcpy(result, a);
1611
1612 /* we can not handle deletion conflicts */
1613 if (is_null_sha1(base))
1614 return 0;
1615 if (is_null_sha1(a))
1616 return 0;
1617 if (is_null_sha1(b))
1618 return 0;
1619
1620 if (add_submodule_odb(path)) {
1621 MERGE_WARNING(path, "not checked out");
1622 return 0;
1623 }
1624
1625 if (!(commit_base = lookup_commit_reference(base)) ||
1626 !(commit_a = lookup_commit_reference(a)) ||
1627 !(commit_b = lookup_commit_reference(b))) {
1628 MERGE_WARNING(path, "commits not present");
1629 return 0;
1630 }
1631
1632 /* check whether both changes are forward */
a20efee9
JH
1633 if (!in_merge_bases(commit_base, commit_a) ||
1634 !in_merge_bases(commit_base, commit_b)) {
68d03e4a
HV
1635 MERGE_WARNING(path, "commits don't follow merge-base");
1636 return 0;
1637 }
1638
1639 /* Case #1: a is contained in b or vice versa */
a20efee9 1640 if (in_merge_bases(commit_a, commit_b)) {
68d03e4a
HV
1641 hashcpy(result, b);
1642 return 1;
1643 }
a20efee9 1644 if (in_merge_bases(commit_b, commit_a)) {
68d03e4a
HV
1645 hashcpy(result, a);
1646 return 1;
1647 }
1648
1649 /*
1650 * Case #2: There are one or more merges that contain a and b in
1651 * the submodule. If there is only one, then present it as a
1652 * suggestion to the user, but leave it marked unmerged so the
1653 * user needs to confirm the resolution.
1654 */
1655
80988783
BK
1656 /* Skip the search if makes no sense to the calling context. */
1657 if (!search)
1658 return 0;
1659
68d03e4a
HV
1660 /* find commit which merges them */
1661 parent_count = find_first_merges(&merges, path, commit_a, commit_b);
1662 switch (parent_count) {
1663 case 0:
1664 MERGE_WARNING(path, "merge following commits not found");
1665 break;
1666
1667 case 1:
1668 MERGE_WARNING(path, "not fast-forward");
1669 fprintf(stderr, "Found a possible merge resolution "
1670 "for the submodule:\n");
1671 print_commit((struct commit *) merges.objects[0].item);
1672 fprintf(stderr,
1673 "If this is correct simply add it to the index "
1674 "for example\n"
1675 "by using:\n\n"
1676 " git update-index --cacheinfo 160000 %s \"%s\"\n\n"
1677 "which will accept this suggestion.\n",
f2fd0760 1678 oid_to_hex(&merges.objects[0].item->oid), path);
68d03e4a
HV
1679 break;
1680
1681 default:
1682 MERGE_WARNING(path, "multiple merges found");
1683 for (i = 0; i < merges.nr; i++)
1684 print_commit((struct commit *) merges.objects[i].item);
1685 }
1686
1687 free(merges.objects);
1688 return 0;
1689}
a88c915d 1690
a028a193
SB
1691int parallel_submodules(void)
1692{
1693 return parallel_jobs;
1694}
e059388f 1695
f6f85861
SB
1696/*
1697 * Embeds a single submodules git directory into the superprojects git dir,
1698 * non recursively.
1699 */
1700static void relocate_single_git_dir_into_superproject(const char *prefix,
1701 const char *path)
1702{
1703 char *old_git_dir = NULL, *real_old_git_dir = NULL, *real_new_git_dir = NULL;
1704 const char *new_git_dir;
1705 const struct submodule *sub;
1706
1707 if (submodule_uses_worktrees(path))
1708 die(_("relocate_gitdir for submodule '%s' with "
1709 "more than one worktree not supported"), path);
1710
1711 old_git_dir = xstrfmt("%s/.git", path);
1712 if (read_gitfile(old_git_dir))
1713 /* If it is an actual gitfile, it doesn't need migration. */
1714 return;
1715
ce83eadd 1716 real_old_git_dir = real_pathdup(old_git_dir, 1);
f6f85861
SB
1717
1718 sub = submodule_from_path(null_sha1, path);
1719 if (!sub)
1720 die(_("could not lookup name for submodule '%s'"), path);
1721
1722 new_git_dir = git_path("modules/%s", sub->name);
1723 if (safe_create_leading_directories_const(new_git_dir) < 0)
1724 die(_("could not create directory '%s'"), new_git_dir);
ce83eadd 1725 real_new_git_dir = real_pathdup(new_git_dir, 1);
f6f85861 1726
f6f85861 1727 fprintf(stderr, _("Migrating git directory of '%s%s' from\n'%s' to\n'%s'\n"),
202275b9 1728 get_super_prefix_or_empty(), path,
f6f85861
SB
1729 real_old_git_dir, real_new_git_dir);
1730
1731 relocate_gitdir(path, real_old_git_dir, real_new_git_dir);
1732
1733 free(old_git_dir);
1734 free(real_old_git_dir);
1735 free(real_new_git_dir);
1736}
1737
1738/*
1739 * Migrate the git directory of the submodule given by path from
1740 * having its git directory within the working tree to the git dir nested
1741 * in its superprojects git dir under modules/.
1742 */
1743void absorb_git_dir_into_superproject(const char *prefix,
1744 const char *path,
1745 unsigned flags)
1746{
ec9629b3
SB
1747 int err_code;
1748 const char *sub_git_dir;
f6f85861 1749 struct strbuf gitdir = STRBUF_INIT;
f6f85861 1750 strbuf_addf(&gitdir, "%s/.git", path);
ec9629b3 1751 sub_git_dir = resolve_gitdir_gently(gitdir.buf, &err_code);
f6f85861
SB
1752
1753 /* Not populated? */
ec9629b3 1754 if (!sub_git_dir) {
ec9629b3
SB
1755 const struct submodule *sub;
1756
1757 if (err_code == READ_GITFILE_ERR_STAT_FAILED) {
1758 /* unpopulated as expected */
1759 strbuf_release(&gitdir);
1760 return;
1761 }
1762
1763 if (err_code != READ_GITFILE_ERR_NOT_A_REPO)
1764 /* We don't know what broke here. */
1765 read_gitfile_error_die(err_code, path, NULL);
1766
1767 /*
1768 * Maybe populated, but no git directory was found?
1769 * This can happen if the superproject is a submodule
1770 * itself and was just absorbed. The absorption of the
1771 * superproject did not rewrite the git file links yet,
1772 * fix it now.
1773 */
1774 sub = submodule_from_path(null_sha1, path);
1775 if (!sub)
1776 die(_("could not lookup name for submodule '%s'"), path);
365444a6
SB
1777 connect_work_tree_and_git_dir(path,
1778 git_path("modules/%s", sub->name));
ec9629b3
SB
1779 } else {
1780 /* Is it already absorbed into the superprojects git dir? */
ce83eadd
JS
1781 char *real_sub_git_dir = real_pathdup(sub_git_dir, 1);
1782 char *real_common_git_dir = real_pathdup(get_git_common_dir(), 1);
f6f85861 1783
ec9629b3
SB
1784 if (!starts_with(real_sub_git_dir, real_common_git_dir))
1785 relocate_single_git_dir_into_superproject(prefix, path);
1786
1787 free(real_sub_git_dir);
1788 free(real_common_git_dir);
1789 }
1790 strbuf_release(&gitdir);
f6f85861
SB
1791
1792 if (flags & ABSORB_GITDIR_RECURSE_SUBMODULES) {
1793 struct child_process cp = CHILD_PROCESS_INIT;
1794 struct strbuf sb = STRBUF_INIT;
1795
1796 if (flags & ~ABSORB_GITDIR_RECURSE_SUBMODULES)
1797 die("BUG: we don't know how to pass the flags down?");
1798
202275b9 1799 strbuf_addstr(&sb, get_super_prefix_or_empty());
f6f85861
SB
1800 strbuf_addstr(&sb, path);
1801 strbuf_addch(&sb, '/');
1802
1803 cp.dir = path;
1804 cp.git_cmd = 1;
1805 cp.no_stdin = 1;
1806 argv_array_pushl(&cp.args, "--super-prefix", sb.buf,
1807 "submodule--helper",
1808 "absorb-git-dirs", NULL);
1809 prepare_submodule_repo_env(&cp.env_array);
1810 if (run_command(&cp))
1811 die(_("could not recurse into submodule '%s'"), path);
1812
1813 strbuf_release(&sb);
1814 }
f6f85861 1815}
bf0231c6
SB
1816
1817const char *get_superproject_working_tree(void)
1818{
1819 struct child_process cp = CHILD_PROCESS_INIT;
1820 struct strbuf sb = STRBUF_INIT;
1821 const char *one_up = real_path_if_valid("../");
1822 const char *cwd = xgetcwd();
1823 const char *ret = NULL;
1824 const char *subpath;
1825 int code;
1826 ssize_t len;
1827
1828 if (!is_inside_work_tree())
1829 /*
1830 * FIXME:
1831 * We might have a superproject, but it is harder
1832 * to determine.
1833 */
1834 return NULL;
1835
1836 if (!one_up)
1837 return NULL;
1838
1839 subpath = relative_path(cwd, one_up, &sb);
1840
1841 prepare_submodule_repo_env(&cp.env_array);
1842 argv_array_pop(&cp.env_array);
1843
1844 argv_array_pushl(&cp.args, "--literal-pathspecs", "-C", "..",
1845 "ls-files", "-z", "--stage", "--full-name", "--",
1846 subpath, NULL);
1847 strbuf_reset(&sb);
1848
1849 cp.no_stdin = 1;
1850 cp.no_stderr = 1;
1851 cp.out = -1;
1852 cp.git_cmd = 1;
1853
1854 if (start_command(&cp))
1855 die(_("could not start ls-files in .."));
1856
1857 len = strbuf_read(&sb, cp.out, PATH_MAX);
1858 close(cp.out);
1859
1860 if (starts_with(sb.buf, "160000")) {
1861 int super_sub_len;
1862 int cwd_len = strlen(cwd);
1863 char *super_sub, *super_wt;
1864
1865 /*
1866 * There is a superproject having this repo as a submodule.
1867 * The format is <mode> SP <hash> SP <stage> TAB <full name> \0,
1868 * We're only interested in the name after the tab.
1869 */
1870 super_sub = strchr(sb.buf, '\t') + 1;
1871 super_sub_len = sb.buf + sb.len - super_sub - 1;
1872
1873 if (super_sub_len > cwd_len ||
1874 strcmp(&cwd[cwd_len - super_sub_len], super_sub))
1875 die (_("BUG: returned path string doesn't match cwd?"));
1876
1877 super_wt = xstrdup(cwd);
1878 super_wt[cwd_len - super_sub_len] = '\0';
1879
1880 ret = real_path(super_wt);
1881 free(super_wt);
1882 }
1883 strbuf_release(&sb);
1884
1885 code = finish_command(&cp);
1886
1887 if (code == 128)
1888 /* '../' is not a git repository */
1889 return NULL;
1890 if (code == 0 && len == 0)
1891 /* There is an unrelated git repository at '../' */
1892 return NULL;
1893 if (code)
1894 die(_("ls-tree returned unexpected return code %d"), code);
1895
1896 return ret;
1897}
bbbb7de7
NTND
1898
1899int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
1900{
1901 const struct submodule *sub;
1902 const char *git_dir;
1903 int ret = 0;
1904
1905 strbuf_reset(buf);
1906 strbuf_addstr(buf, submodule);
1907 strbuf_complete(buf, '/');
1908 strbuf_addstr(buf, ".git");
1909
1910 git_dir = read_gitfile(buf->buf);
1911 if (git_dir) {
1912 strbuf_reset(buf);
1913 strbuf_addstr(buf, git_dir);
1914 }
1915 if (!is_git_directory(buf->buf)) {
1916 gitmodules_config();
1917 sub = submodule_from_path(null_sha1, submodule);
1918 if (!sub) {
1919 ret = -1;
1920 goto cleanup;
1921 }
1922 strbuf_reset(buf);
1923 strbuf_git_path(buf, "%s/%s", "modules", sub->name);
1924 }
1925
1926cleanup:
1927 return ret;
1928}