cocci: avoid self-references in object_id transformations
[alt-git.git] / submodule.c
blob9d8d91c207e7a2c09bdf997ba05c67b1262d8091
1 #include "cache.h"
2 #include "submodule-config.h"
3 #include "submodule.h"
4 #include "dir.h"
5 #include "diff.h"
6 #include "commit.h"
7 #include "revision.h"
8 #include "run-command.h"
9 #include "diffcore.h"
10 #include "refs.h"
11 #include "string-list.h"
12 #include "sha1-array.h"
13 #include "argv-array.h"
14 #include "blob.h"
15 #include "thread-utils.h"
16 #include "quote.h"
18 static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND;
19 static int parallel_jobs = 1;
20 static struct string_list changed_submodule_paths = STRING_LIST_INIT_NODUP;
21 static int initialized_fetch_ref_tips;
22 static struct sha1_array ref_tips_before_fetch;
23 static struct sha1_array ref_tips_after_fetch;
26 * The following flag is set if the .gitmodules file is unmerged. We then
27 * disable recursion for all submodules where .git/config doesn't have a
28 * matching config entry because we can't guess what might be configured in
29 * .gitmodules unless the user resolves the conflict. When a command line
30 * option is given (which always overrides configuration) this flag will be
31 * ignored.
33 static int gitmodules_is_unmerged;
36 * This flag is set if the .gitmodules file had unstaged modifications on
37 * startup. This must be checked before allowing modifications to the
38 * .gitmodules file with the intention to stage them later, because when
39 * continuing we would stage the modifications the user didn't stage herself
40 * too. That might change in a future version when we learn to stage the
41 * changes we do ourselves without staging any previous modifications.
43 static int gitmodules_is_modified;
45 int is_staging_gitmodules_ok(void)
47 return !gitmodules_is_modified;
51 * Try to update the "path" entry in the "submodule.<name>" section of the
52 * .gitmodules file. Return 0 only if a .gitmodules file was found, a section
53 * with the correct path=<oldpath> setting was found and we could update it.
55 int update_path_in_gitmodules(const char *oldpath, const char *newpath)
57 struct strbuf entry = STRBUF_INIT;
58 const struct submodule *submodule;
60 if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */
61 return -1;
63 if (gitmodules_is_unmerged)
64 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
66 submodule = submodule_from_path(null_sha1, oldpath);
67 if (!submodule || !submodule->name) {
68 warning(_("Could not find section in .gitmodules where path=%s"), oldpath);
69 return -1;
71 strbuf_addstr(&entry, "submodule.");
72 strbuf_addstr(&entry, submodule->name);
73 strbuf_addstr(&entry, ".path");
74 if (git_config_set_in_file_gently(".gitmodules", entry.buf, newpath) < 0) {
75 /* Maybe the user already did that, don't error out here */
76 warning(_("Could not update .gitmodules entry %s"), entry.buf);
77 strbuf_release(&entry);
78 return -1;
80 strbuf_release(&entry);
81 return 0;
85 * Try to remove the "submodule.<name>" section from .gitmodules where the given
86 * path is configured. Return 0 only if a .gitmodules file was found, a section
87 * with the correct path=<path> setting was found and we could remove it.
89 int remove_path_from_gitmodules(const char *path)
91 struct strbuf sect = STRBUF_INIT;
92 const struct submodule *submodule;
94 if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */
95 return -1;
97 if (gitmodules_is_unmerged)
98 die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
100 submodule = submodule_from_path(null_sha1, path);
101 if (!submodule || !submodule->name) {
102 warning(_("Could not find section in .gitmodules where path=%s"), path);
103 return -1;
105 strbuf_addstr(&sect, "submodule.");
106 strbuf_addstr(&sect, submodule->name);
107 if (git_config_rename_section_in_file(".gitmodules", sect.buf, NULL) < 0) {
108 /* Maybe the user already did that, don't error out here */
109 warning(_("Could not remove .gitmodules entry for %s"), path);
110 strbuf_release(&sect);
111 return -1;
113 strbuf_release(&sect);
114 return 0;
117 void stage_updated_gitmodules(void)
119 if (add_file_to_cache(".gitmodules", 0))
120 die(_("staging updated .gitmodules failed"));
123 static int add_submodule_odb(const char *path)
125 struct strbuf objects_directory = STRBUF_INIT;
126 struct alternate_object_database *alt_odb;
127 int ret = 0;
128 size_t alloc;
130 strbuf_git_path_submodule(&objects_directory, path, "objects/");
131 if (!is_directory(objects_directory.buf)) {
132 ret = -1;
133 goto done;
135 /* avoid adding it twice */
136 prepare_alt_odb();
137 for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
138 if (alt_odb->name - alt_odb->base == objects_directory.len &&
139 !strncmp(alt_odb->base, objects_directory.buf,
140 objects_directory.len))
141 goto done;
143 alloc = st_add(objects_directory.len, 42); /* for "12/345..." sha1 */
144 alt_odb = xmalloc(st_add(sizeof(*alt_odb), alloc));
145 alt_odb->next = alt_odb_list;
146 xsnprintf(alt_odb->base, alloc, "%s", objects_directory.buf);
147 alt_odb->name = alt_odb->base + objects_directory.len;
148 alt_odb->name[2] = '/';
149 alt_odb->name[40] = '\0';
150 alt_odb->name[41] = '\0';
151 alt_odb_list = alt_odb;
153 /* add possible alternates from the submodule */
154 read_info_alternates(objects_directory.buf, 0);
155 done:
156 strbuf_release(&objects_directory);
157 return ret;
160 void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
161 const char *path)
163 const struct submodule *submodule = submodule_from_path(null_sha1, path);
164 if (submodule) {
165 if (submodule->ignore)
166 handle_ignore_submodules_arg(diffopt, submodule->ignore);
167 else if (gitmodules_is_unmerged)
168 DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
172 int submodule_config(const char *var, const char *value, void *cb)
174 if (!strcmp(var, "submodule.fetchjobs")) {
175 parallel_jobs = git_config_int(var, value);
176 if (parallel_jobs < 0)
177 die(_("negative values not allowed for submodule.fetchJobs"));
178 return 0;
179 } else if (starts_with(var, "submodule."))
180 return parse_submodule_config_option(var, value);
181 else if (!strcmp(var, "fetch.recursesubmodules")) {
182 config_fetch_recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
183 return 0;
185 return 0;
188 void gitmodules_config(void)
190 const char *work_tree = get_git_work_tree();
191 if (work_tree) {
192 struct strbuf gitmodules_path = STRBUF_INIT;
193 int pos;
194 strbuf_addstr(&gitmodules_path, work_tree);
195 strbuf_addstr(&gitmodules_path, "/.gitmodules");
196 if (read_cache() < 0)
197 die("index file corrupt");
198 pos = cache_name_pos(".gitmodules", 11);
199 if (pos < 0) { /* .gitmodules not found or isn't merged */
200 pos = -1 - pos;
201 if (active_nr > pos) { /* there is a .gitmodules */
202 const struct cache_entry *ce = active_cache[pos];
203 if (ce_namelen(ce) == 11 &&
204 !memcmp(ce->name, ".gitmodules", 11))
205 gitmodules_is_unmerged = 1;
207 } else if (pos < active_nr) {
208 struct stat st;
209 if (lstat(".gitmodules", &st) == 0 &&
210 ce_match_stat(active_cache[pos], &st, 0) & DATA_CHANGED)
211 gitmodules_is_modified = 1;
214 if (!gitmodules_is_unmerged)
215 git_config_from_file(submodule_config, gitmodules_path.buf, NULL);
216 strbuf_release(&gitmodules_path);
220 int parse_submodule_update_strategy(const char *value,
221 struct submodule_update_strategy *dst)
223 free((void*)dst->command);
224 dst->command = NULL;
225 if (!strcmp(value, "none"))
226 dst->type = SM_UPDATE_NONE;
227 else if (!strcmp(value, "checkout"))
228 dst->type = SM_UPDATE_CHECKOUT;
229 else if (!strcmp(value, "rebase"))
230 dst->type = SM_UPDATE_REBASE;
231 else if (!strcmp(value, "merge"))
232 dst->type = SM_UPDATE_MERGE;
233 else if (skip_prefix(value, "!", &value)) {
234 dst->type = SM_UPDATE_COMMAND;
235 dst->command = xstrdup(value);
236 } else
237 return -1;
238 return 0;
241 const char *submodule_strategy_to_string(const struct submodule_update_strategy *s)
243 struct strbuf sb = STRBUF_INIT;
244 switch (s->type) {
245 case SM_UPDATE_CHECKOUT:
246 return "checkout";
247 case SM_UPDATE_MERGE:
248 return "merge";
249 case SM_UPDATE_REBASE:
250 return "rebase";
251 case SM_UPDATE_NONE:
252 return "none";
253 case SM_UPDATE_UNSPECIFIED:
254 return NULL;
255 case SM_UPDATE_COMMAND:
256 strbuf_addf(&sb, "!%s", s->command);
257 return strbuf_detach(&sb, NULL);
259 return NULL;
262 void handle_ignore_submodules_arg(struct diff_options *diffopt,
263 const char *arg)
265 DIFF_OPT_CLR(diffopt, IGNORE_SUBMODULES);
266 DIFF_OPT_CLR(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
267 DIFF_OPT_CLR(diffopt, IGNORE_DIRTY_SUBMODULES);
269 if (!strcmp(arg, "all"))
270 DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
271 else if (!strcmp(arg, "untracked"))
272 DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
273 else if (!strcmp(arg, "dirty"))
274 DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
275 else if (strcmp(arg, "none"))
276 die("bad --ignore-submodules argument: %s", arg);
279 static int prepare_submodule_summary(struct rev_info *rev, const char *path,
280 struct commit *left, struct commit *right,
281 int *fast_forward, int *fast_backward)
283 struct commit_list *merge_bases, *list;
285 init_revisions(rev, NULL);
286 setup_revisions(0, NULL, rev, NULL);
287 rev->left_right = 1;
288 rev->first_parent_only = 1;
289 left->object.flags |= SYMMETRIC_LEFT;
290 add_pending_object(rev, &left->object, path);
291 add_pending_object(rev, &right->object, path);
292 merge_bases = get_merge_bases(left, right);
293 if (merge_bases) {
294 if (merge_bases->item == left)
295 *fast_forward = 1;
296 else if (merge_bases->item == right)
297 *fast_backward = 1;
299 for (list = merge_bases; list; list = list->next) {
300 list->item->object.flags |= UNINTERESTING;
301 add_pending_object(rev, &list->item->object,
302 oid_to_hex(&list->item->object.oid));
304 return prepare_revision_walk(rev);
307 static void print_submodule_summary(struct rev_info *rev, FILE *f,
308 const char *line_prefix,
309 const char *del, const char *add, const char *reset)
311 static const char format[] = " %m %s";
312 struct strbuf sb = STRBUF_INIT;
313 struct commit *commit;
315 while ((commit = get_revision(rev))) {
316 struct pretty_print_context ctx = {0};
317 ctx.date_mode = rev->date_mode;
318 ctx.output_encoding = get_log_output_encoding();
319 strbuf_setlen(&sb, 0);
320 strbuf_addstr(&sb, line_prefix);
321 if (commit->object.flags & SYMMETRIC_LEFT) {
322 if (del)
323 strbuf_addstr(&sb, del);
325 else if (add)
326 strbuf_addstr(&sb, add);
327 format_commit_message(commit, format, &sb, &ctx);
328 if (reset)
329 strbuf_addstr(&sb, reset);
330 strbuf_addch(&sb, '\n');
331 fprintf(f, "%s", sb.buf);
333 strbuf_release(&sb);
336 void show_submodule_summary(FILE *f, const char *path,
337 const char *line_prefix,
338 unsigned char one[20], unsigned char two[20],
339 unsigned dirty_submodule, const char *meta,
340 const char *del, const char *add, const char *reset)
342 struct rev_info rev;
343 struct commit *left = NULL, *right = NULL;
344 const char *message = NULL;
345 struct strbuf sb = STRBUF_INIT;
346 int fast_forward = 0, fast_backward = 0;
348 if (is_null_sha1(two))
349 message = "(submodule deleted)";
350 else if (add_submodule_odb(path))
351 message = "(not checked out)";
352 else if (is_null_sha1(one))
353 message = "(new submodule)";
354 else if (!(left = lookup_commit_reference(one)) ||
355 !(right = lookup_commit_reference(two)))
356 message = "(commits not present)";
357 else if (prepare_submodule_summary(&rev, path, left, right,
358 &fast_forward, &fast_backward))
359 message = "(revision walker failed)";
361 if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
362 fprintf(f, "%sSubmodule %s contains untracked content\n",
363 line_prefix, path);
364 if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
365 fprintf(f, "%sSubmodule %s contains modified content\n",
366 line_prefix, path);
368 if (!hashcmp(one, two)) {
369 strbuf_release(&sb);
370 return;
373 strbuf_addf(&sb, "%s%sSubmodule %s ", line_prefix, meta, path);
374 strbuf_add_unique_abbrev(&sb, one, DEFAULT_ABBREV);
375 strbuf_addstr(&sb, (fast_backward || fast_forward) ? ".." : "...");
376 strbuf_add_unique_abbrev(&sb, two, DEFAULT_ABBREV);
377 if (message)
378 strbuf_addf(&sb, " %s%s\n", message, reset);
379 else
380 strbuf_addf(&sb, "%s:%s\n", fast_backward ? " (rewind)" : "", reset);
381 fwrite(sb.buf, sb.len, 1, f);
383 if (!message) /* only NULL if we succeeded in setting up the walk */
384 print_submodule_summary(&rev, f, line_prefix, del, add, reset);
385 if (left)
386 clear_commit_marks(left, ~0);
387 if (right)
388 clear_commit_marks(right, ~0);
390 strbuf_release(&sb);
393 void set_config_fetch_recurse_submodules(int value)
395 config_fetch_recurse_submodules = value;
398 static int has_remote(const char *refname, const struct object_id *oid,
399 int flags, void *cb_data)
401 return 1;
404 static int submodule_needs_pushing(const char *path, const unsigned char sha1[20])
406 if (add_submodule_odb(path) || !lookup_commit_reference(sha1))
407 return 0;
409 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
410 struct child_process cp = CHILD_PROCESS_INIT;
411 const char *argv[] = {"rev-list", NULL, "--not", "--remotes", "-n", "1" , NULL};
412 struct strbuf buf = STRBUF_INIT;
413 int needs_pushing = 0;
415 argv[1] = sha1_to_hex(sha1);
416 cp.argv = argv;
417 prepare_submodule_repo_env(&cp.env_array);
418 cp.git_cmd = 1;
419 cp.no_stdin = 1;
420 cp.out = -1;
421 cp.dir = path;
422 if (start_command(&cp))
423 die("Could not run 'git rev-list %s --not --remotes -n 1' command in submodule %s",
424 sha1_to_hex(sha1), path);
425 if (strbuf_read(&buf, cp.out, 41))
426 needs_pushing = 1;
427 finish_command(&cp);
428 close(cp.out);
429 strbuf_release(&buf);
430 return needs_pushing;
433 return 0;
436 static void collect_submodules_from_diff(struct diff_queue_struct *q,
437 struct diff_options *options,
438 void *data)
440 int i;
441 struct string_list *needs_pushing = data;
443 for (i = 0; i < q->nr; i++) {
444 struct diff_filepair *p = q->queue[i];
445 if (!S_ISGITLINK(p->two->mode))
446 continue;
447 if (submodule_needs_pushing(p->two->path, p->two->oid.hash))
448 string_list_insert(needs_pushing, p->two->path);
452 static void find_unpushed_submodule_commits(struct commit *commit,
453 struct string_list *needs_pushing)
455 struct rev_info rev;
457 init_revisions(&rev, NULL);
458 rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
459 rev.diffopt.format_callback = collect_submodules_from_diff;
460 rev.diffopt.format_callback_data = needs_pushing;
461 diff_tree_combined_merge(commit, 1, &rev);
464 int find_unpushed_submodules(unsigned char new_sha1[20],
465 const char *remotes_name, struct string_list *needs_pushing)
467 struct rev_info rev;
468 struct commit *commit;
469 const char *argv[] = {NULL, NULL, "--not", "NULL", NULL};
470 int argc = ARRAY_SIZE(argv) - 1;
471 char *sha1_copy;
473 struct strbuf remotes_arg = STRBUF_INIT;
475 strbuf_addf(&remotes_arg, "--remotes=%s", remotes_name);
476 init_revisions(&rev, NULL);
477 sha1_copy = xstrdup(sha1_to_hex(new_sha1));
478 argv[1] = sha1_copy;
479 argv[3] = remotes_arg.buf;
480 setup_revisions(argc, argv, &rev, NULL);
481 if (prepare_revision_walk(&rev))
482 die("revision walk setup failed");
484 while ((commit = get_revision(&rev)) != NULL)
485 find_unpushed_submodule_commits(commit, needs_pushing);
487 reset_revision_walk();
488 free(sha1_copy);
489 strbuf_release(&remotes_arg);
491 return needs_pushing->nr;
494 static int push_submodule(const char *path)
496 if (add_submodule_odb(path))
497 return 1;
499 if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
500 struct child_process cp = CHILD_PROCESS_INIT;
501 const char *argv[] = {"push", NULL};
503 cp.argv = argv;
504 prepare_submodule_repo_env(&cp.env_array);
505 cp.git_cmd = 1;
506 cp.no_stdin = 1;
507 cp.dir = path;
508 if (run_command(&cp))
509 return 0;
510 close(cp.out);
513 return 1;
516 int push_unpushed_submodules(unsigned char new_sha1[20], const char *remotes_name)
518 int i, ret = 1;
519 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
521 if (!find_unpushed_submodules(new_sha1, remotes_name, &needs_pushing))
522 return 1;
524 for (i = 0; i < needs_pushing.nr; i++) {
525 const char *path = needs_pushing.items[i].string;
526 fprintf(stderr, "Pushing submodule '%s'\n", path);
527 if (!push_submodule(path)) {
528 fprintf(stderr, "Unable to push submodule '%s'\n", path);
529 ret = 0;
533 string_list_clear(&needs_pushing, 0);
535 return ret;
538 static int is_submodule_commit_present(const char *path, unsigned char sha1[20])
540 int is_present = 0;
541 if (!add_submodule_odb(path) && lookup_commit_reference(sha1)) {
542 /* Even if the submodule is checked out and the commit is
543 * present, make sure it is reachable from a ref. */
544 struct child_process cp = CHILD_PROCESS_INIT;
545 const char *argv[] = {"rev-list", "-n", "1", NULL, "--not", "--all", NULL};
546 struct strbuf buf = STRBUF_INIT;
548 argv[3] = sha1_to_hex(sha1);
549 cp.argv = argv;
550 prepare_submodule_repo_env(&cp.env_array);
551 cp.git_cmd = 1;
552 cp.no_stdin = 1;
553 cp.dir = path;
554 if (!capture_command(&cp, &buf, 1024) && !buf.len)
555 is_present = 1;
557 strbuf_release(&buf);
559 return is_present;
562 static void submodule_collect_changed_cb(struct diff_queue_struct *q,
563 struct diff_options *options,
564 void *data)
566 int i;
567 for (i = 0; i < q->nr; i++) {
568 struct diff_filepair *p = q->queue[i];
569 if (!S_ISGITLINK(p->two->mode))
570 continue;
572 if (S_ISGITLINK(p->one->mode)) {
573 /* NEEDSWORK: We should honor the name configured in
574 * the .gitmodules file of the commit we are examining
575 * here to be able to correctly follow submodules
576 * being moved around. */
577 struct string_list_item *path;
578 path = unsorted_string_list_lookup(&changed_submodule_paths, p->two->path);
579 if (!path && !is_submodule_commit_present(p->two->path, p->two->oid.hash))
580 string_list_append(&changed_submodule_paths, xstrdup(p->two->path));
581 } else {
582 /* Submodule is new or was moved here */
583 /* NEEDSWORK: When the .git directories of submodules
584 * live inside the superprojects .git directory some
585 * day we should fetch new submodules directly into
586 * that location too when config or options request
587 * that so they can be checked out from there. */
588 continue;
593 static int add_sha1_to_array(const char *ref, const struct object_id *oid,
594 int flags, void *data)
596 sha1_array_append(data, oid->hash);
597 return 0;
600 void check_for_new_submodule_commits(unsigned char new_sha1[20])
602 if (!initialized_fetch_ref_tips) {
603 for_each_ref(add_sha1_to_array, &ref_tips_before_fetch);
604 initialized_fetch_ref_tips = 1;
607 sha1_array_append(&ref_tips_after_fetch, new_sha1);
610 static void add_sha1_to_argv(const unsigned char sha1[20], void *data)
612 argv_array_push(data, sha1_to_hex(sha1));
615 static void calculate_changed_submodule_paths(void)
617 struct rev_info rev;
618 struct commit *commit;
619 struct argv_array argv = ARGV_ARRAY_INIT;
621 /* No need to check if there are no submodules configured */
622 if (!submodule_from_path(NULL, NULL))
623 return;
625 init_revisions(&rev, NULL);
626 argv_array_push(&argv, "--"); /* argv[0] program name */
627 sha1_array_for_each_unique(&ref_tips_after_fetch,
628 add_sha1_to_argv, &argv);
629 argv_array_push(&argv, "--not");
630 sha1_array_for_each_unique(&ref_tips_before_fetch,
631 add_sha1_to_argv, &argv);
632 setup_revisions(argv.argc, argv.argv, &rev, NULL);
633 if (prepare_revision_walk(&rev))
634 die("revision walk setup failed");
637 * Collect all submodules (whether checked out or not) for which new
638 * commits have been recorded upstream in "changed_submodule_paths".
640 while ((commit = get_revision(&rev))) {
641 struct commit_list *parent = commit->parents;
642 while (parent) {
643 struct diff_options diff_opts;
644 diff_setup(&diff_opts);
645 DIFF_OPT_SET(&diff_opts, RECURSIVE);
646 diff_opts.output_format |= DIFF_FORMAT_CALLBACK;
647 diff_opts.format_callback = submodule_collect_changed_cb;
648 diff_setup_done(&diff_opts);
649 diff_tree_sha1(parent->item->object.oid.hash, commit->object.oid.hash, "", &diff_opts);
650 diffcore_std(&diff_opts);
651 diff_flush(&diff_opts);
652 parent = parent->next;
656 argv_array_clear(&argv);
657 sha1_array_clear(&ref_tips_before_fetch);
658 sha1_array_clear(&ref_tips_after_fetch);
659 initialized_fetch_ref_tips = 0;
662 struct submodule_parallel_fetch {
663 int count;
664 struct argv_array args;
665 const char *work_tree;
666 const char *prefix;
667 int command_line_option;
668 int quiet;
669 int result;
671 #define SPF_INIT {0, ARGV_ARRAY_INIT, NULL, NULL, 0, 0, 0}
673 static int get_next_submodule(struct child_process *cp,
674 struct strbuf *err, void *data, void **task_cb)
676 int ret = 0;
677 struct submodule_parallel_fetch *spf = data;
679 for (; spf->count < active_nr; spf->count++) {
680 struct strbuf submodule_path = STRBUF_INIT;
681 struct strbuf submodule_git_dir = STRBUF_INIT;
682 struct strbuf submodule_prefix = STRBUF_INIT;
683 const struct cache_entry *ce = active_cache[spf->count];
684 const char *git_dir, *default_argv;
685 const struct submodule *submodule;
687 if (!S_ISGITLINK(ce->ce_mode))
688 continue;
690 submodule = submodule_from_path(null_sha1, ce->name);
691 if (!submodule)
692 submodule = submodule_from_name(null_sha1, ce->name);
694 default_argv = "yes";
695 if (spf->command_line_option == RECURSE_SUBMODULES_DEFAULT) {
696 if (submodule &&
697 submodule->fetch_recurse !=
698 RECURSE_SUBMODULES_NONE) {
699 if (submodule->fetch_recurse ==
700 RECURSE_SUBMODULES_OFF)
701 continue;
702 if (submodule->fetch_recurse ==
703 RECURSE_SUBMODULES_ON_DEMAND) {
704 if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
705 continue;
706 default_argv = "on-demand";
708 } else {
709 if ((config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF) ||
710 gitmodules_is_unmerged)
711 continue;
712 if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) {
713 if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
714 continue;
715 default_argv = "on-demand";
718 } else if (spf->command_line_option == RECURSE_SUBMODULES_ON_DEMAND) {
719 if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
720 continue;
721 default_argv = "on-demand";
724 strbuf_addf(&submodule_path, "%s/%s", spf->work_tree, ce->name);
725 strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
726 strbuf_addf(&submodule_prefix, "%s%s/", spf->prefix, ce->name);
727 git_dir = read_gitfile(submodule_git_dir.buf);
728 if (!git_dir)
729 git_dir = submodule_git_dir.buf;
730 if (is_directory(git_dir)) {
731 child_process_init(cp);
732 cp->dir = strbuf_detach(&submodule_path, NULL);
733 prepare_submodule_repo_env(&cp->env_array);
734 cp->git_cmd = 1;
735 if (!spf->quiet)
736 strbuf_addf(err, "Fetching submodule %s%s\n",
737 spf->prefix, ce->name);
738 argv_array_init(&cp->args);
739 argv_array_pushv(&cp->args, spf->args.argv);
740 argv_array_push(&cp->args, default_argv);
741 argv_array_push(&cp->args, "--submodule-prefix");
742 argv_array_push(&cp->args, submodule_prefix.buf);
743 ret = 1;
745 strbuf_release(&submodule_path);
746 strbuf_release(&submodule_git_dir);
747 strbuf_release(&submodule_prefix);
748 if (ret) {
749 spf->count++;
750 return 1;
753 return 0;
756 static int fetch_start_failure(struct strbuf *err,
757 void *cb, void *task_cb)
759 struct submodule_parallel_fetch *spf = cb;
761 spf->result = 1;
763 return 0;
766 static int fetch_finish(int retvalue, struct strbuf *err,
767 void *cb, void *task_cb)
769 struct submodule_parallel_fetch *spf = cb;
771 if (retvalue)
772 spf->result = 1;
774 return 0;
777 int fetch_populated_submodules(const struct argv_array *options,
778 const char *prefix, int command_line_option,
779 int quiet, int max_parallel_jobs)
781 int i;
782 struct submodule_parallel_fetch spf = SPF_INIT;
784 spf.work_tree = get_git_work_tree();
785 spf.command_line_option = command_line_option;
786 spf.quiet = quiet;
787 spf.prefix = prefix;
789 if (!spf.work_tree)
790 goto out;
792 if (read_cache() < 0)
793 die("index file corrupt");
795 argv_array_push(&spf.args, "fetch");
796 for (i = 0; i < options->argc; i++)
797 argv_array_push(&spf.args, options->argv[i]);
798 argv_array_push(&spf.args, "--recurse-submodules-default");
799 /* default value, "--submodule-prefix" and its value are added later */
801 if (max_parallel_jobs < 0)
802 max_parallel_jobs = parallel_jobs;
804 calculate_changed_submodule_paths();
805 run_processes_parallel(max_parallel_jobs,
806 get_next_submodule,
807 fetch_start_failure,
808 fetch_finish,
809 &spf);
811 argv_array_clear(&spf.args);
812 out:
813 string_list_clear(&changed_submodule_paths, 1);
814 return spf.result;
817 unsigned is_submodule_modified(const char *path, int ignore_untracked)
819 ssize_t len;
820 struct child_process cp = CHILD_PROCESS_INIT;
821 const char *argv[] = {
822 "status",
823 "--porcelain",
824 NULL,
825 NULL,
827 struct strbuf buf = STRBUF_INIT;
828 unsigned dirty_submodule = 0;
829 const char *line, *next_line;
830 const char *git_dir;
832 strbuf_addf(&buf, "%s/.git", path);
833 git_dir = read_gitfile(buf.buf);
834 if (!git_dir)
835 git_dir = buf.buf;
836 if (!is_directory(git_dir)) {
837 strbuf_release(&buf);
838 /* The submodule is not checked out, so it is not modified */
839 return 0;
842 strbuf_reset(&buf);
844 if (ignore_untracked)
845 argv[2] = "-uno";
847 cp.argv = argv;
848 prepare_submodule_repo_env(&cp.env_array);
849 cp.git_cmd = 1;
850 cp.no_stdin = 1;
851 cp.out = -1;
852 cp.dir = path;
853 if (start_command(&cp))
854 die("Could not run 'git status --porcelain' in submodule %s", path);
856 len = strbuf_read(&buf, cp.out, 1024);
857 line = buf.buf;
858 while (len > 2) {
859 if ((line[0] == '?') && (line[1] == '?')) {
860 dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
861 if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
862 break;
863 } else {
864 dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
865 if (ignore_untracked ||
866 (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
867 break;
869 next_line = strchr(line, '\n');
870 if (!next_line)
871 break;
872 next_line++;
873 len -= (next_line - line);
874 line = next_line;
876 close(cp.out);
878 if (finish_command(&cp))
879 die("'git status --porcelain' failed in submodule %s", path);
881 strbuf_release(&buf);
882 return dirty_submodule;
885 int submodule_uses_gitfile(const char *path)
887 struct child_process cp = CHILD_PROCESS_INIT;
888 const char *argv[] = {
889 "submodule",
890 "foreach",
891 "--quiet",
892 "--recursive",
893 "test -f .git",
894 NULL,
896 struct strbuf buf = STRBUF_INIT;
897 const char *git_dir;
899 strbuf_addf(&buf, "%s/.git", path);
900 git_dir = read_gitfile(buf.buf);
901 if (!git_dir) {
902 strbuf_release(&buf);
903 return 0;
905 strbuf_release(&buf);
907 /* Now test that all nested submodules use a gitfile too */
908 cp.argv = argv;
909 prepare_submodule_repo_env(&cp.env_array);
910 cp.git_cmd = 1;
911 cp.no_stdin = 1;
912 cp.no_stderr = 1;
913 cp.no_stdout = 1;
914 cp.dir = path;
915 if (run_command(&cp))
916 return 0;
918 return 1;
921 int ok_to_remove_submodule(const char *path)
923 ssize_t len;
924 struct child_process cp = CHILD_PROCESS_INIT;
925 const char *argv[] = {
926 "status",
927 "--porcelain",
928 "-u",
929 "--ignore-submodules=none",
930 NULL,
932 struct strbuf buf = STRBUF_INIT;
933 int ok_to_remove = 1;
935 if (!file_exists(path) || is_empty_dir(path))
936 return 1;
938 if (!submodule_uses_gitfile(path))
939 return 0;
941 cp.argv = argv;
942 prepare_submodule_repo_env(&cp.env_array);
943 cp.git_cmd = 1;
944 cp.no_stdin = 1;
945 cp.out = -1;
946 cp.dir = path;
947 if (start_command(&cp))
948 die("Could not run 'git status --porcelain -uall --ignore-submodules=none' in submodule %s", path);
950 len = strbuf_read(&buf, cp.out, 1024);
951 if (len > 2)
952 ok_to_remove = 0;
953 close(cp.out);
955 if (finish_command(&cp))
956 die("'git status --porcelain -uall --ignore-submodules=none' failed in submodule %s", path);
958 strbuf_release(&buf);
959 return ok_to_remove;
962 static int find_first_merges(struct object_array *result, const char *path,
963 struct commit *a, struct commit *b)
965 int i, j;
966 struct object_array merges = OBJECT_ARRAY_INIT;
967 struct commit *commit;
968 int contains_another;
970 char merged_revision[42];
971 const char *rev_args[] = { "rev-list", "--merges", "--ancestry-path",
972 "--all", merged_revision, NULL };
973 struct rev_info revs;
974 struct setup_revision_opt rev_opts;
976 memset(result, 0, sizeof(struct object_array));
977 memset(&rev_opts, 0, sizeof(rev_opts));
979 /* get all revisions that merge commit a */
980 snprintf(merged_revision, sizeof(merged_revision), "^%s",
981 oid_to_hex(&a->object.oid));
982 init_revisions(&revs, NULL);
983 rev_opts.submodule = path;
984 setup_revisions(ARRAY_SIZE(rev_args)-1, rev_args, &revs, &rev_opts);
986 /* save all revisions from the above list that contain b */
987 if (prepare_revision_walk(&revs))
988 die("revision walk setup failed");
989 while ((commit = get_revision(&revs)) != NULL) {
990 struct object *o = &(commit->object);
991 if (in_merge_bases(b, commit))
992 add_object_array(o, NULL, &merges);
994 reset_revision_walk();
996 /* Now we've got all merges that contain a and b. Prune all
997 * merges that contain another found merge and save them in
998 * result.
1000 for (i = 0; i < merges.nr; i++) {
1001 struct commit *m1 = (struct commit *) merges.objects[i].item;
1003 contains_another = 0;
1004 for (j = 0; j < merges.nr; j++) {
1005 struct commit *m2 = (struct commit *) merges.objects[j].item;
1006 if (i != j && in_merge_bases(m2, m1)) {
1007 contains_another = 1;
1008 break;
1012 if (!contains_another)
1013 add_object_array(merges.objects[i].item, NULL, result);
1016 free(merges.objects);
1017 return result->nr;
1020 static void print_commit(struct commit *commit)
1022 struct strbuf sb = STRBUF_INIT;
1023 struct pretty_print_context ctx = {0};
1024 ctx.date_mode.type = DATE_NORMAL;
1025 format_commit_message(commit, " %h: %m %s", &sb, &ctx);
1026 fprintf(stderr, "%s\n", sb.buf);
1027 strbuf_release(&sb);
1030 #define MERGE_WARNING(path, msg) \
1031 warning("Failed to merge submodule %s (%s)", path, msg);
1033 int merge_submodule(unsigned char result[20], const char *path,
1034 const unsigned char base[20], const unsigned char a[20],
1035 const unsigned char b[20], int search)
1037 struct commit *commit_base, *commit_a, *commit_b;
1038 int parent_count;
1039 struct object_array merges;
1041 int i;
1043 /* store a in result in case we fail */
1044 hashcpy(result, a);
1046 /* we can not handle deletion conflicts */
1047 if (is_null_sha1(base))
1048 return 0;
1049 if (is_null_sha1(a))
1050 return 0;
1051 if (is_null_sha1(b))
1052 return 0;
1054 if (add_submodule_odb(path)) {
1055 MERGE_WARNING(path, "not checked out");
1056 return 0;
1059 if (!(commit_base = lookup_commit_reference(base)) ||
1060 !(commit_a = lookup_commit_reference(a)) ||
1061 !(commit_b = lookup_commit_reference(b))) {
1062 MERGE_WARNING(path, "commits not present");
1063 return 0;
1066 /* check whether both changes are forward */
1067 if (!in_merge_bases(commit_base, commit_a) ||
1068 !in_merge_bases(commit_base, commit_b)) {
1069 MERGE_WARNING(path, "commits don't follow merge-base");
1070 return 0;
1073 /* Case #1: a is contained in b or vice versa */
1074 if (in_merge_bases(commit_a, commit_b)) {
1075 hashcpy(result, b);
1076 return 1;
1078 if (in_merge_bases(commit_b, commit_a)) {
1079 hashcpy(result, a);
1080 return 1;
1084 * Case #2: There are one or more merges that contain a and b in
1085 * the submodule. If there is only one, then present it as a
1086 * suggestion to the user, but leave it marked unmerged so the
1087 * user needs to confirm the resolution.
1090 /* Skip the search if makes no sense to the calling context. */
1091 if (!search)
1092 return 0;
1094 /* find commit which merges them */
1095 parent_count = find_first_merges(&merges, path, commit_a, commit_b);
1096 switch (parent_count) {
1097 case 0:
1098 MERGE_WARNING(path, "merge following commits not found");
1099 break;
1101 case 1:
1102 MERGE_WARNING(path, "not fast-forward");
1103 fprintf(stderr, "Found a possible merge resolution "
1104 "for the submodule:\n");
1105 print_commit((struct commit *) merges.objects[0].item);
1106 fprintf(stderr,
1107 "If this is correct simply add it to the index "
1108 "for example\n"
1109 "by using:\n\n"
1110 " git update-index --cacheinfo 160000 %s \"%s\"\n\n"
1111 "which will accept this suggestion.\n",
1112 oid_to_hex(&merges.objects[0].item->oid), path);
1113 break;
1115 default:
1116 MERGE_WARNING(path, "multiple merges found");
1117 for (i = 0; i < merges.nr; i++)
1118 print_commit((struct commit *) merges.objects[i].item);
1121 free(merges.objects);
1122 return 0;
1125 /* Update gitfile and core.worktree setting to connect work tree and git dir */
1126 void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir)
1128 struct strbuf file_name = STRBUF_INIT;
1129 struct strbuf rel_path = STRBUF_INIT;
1130 const char *real_work_tree = xstrdup(real_path(work_tree));
1132 /* Update gitfile */
1133 strbuf_addf(&file_name, "%s/.git", work_tree);
1134 write_file(file_name.buf, "gitdir: %s",
1135 relative_path(git_dir, real_work_tree, &rel_path));
1137 /* Update core.worktree setting */
1138 strbuf_reset(&file_name);
1139 strbuf_addf(&file_name, "%s/config", git_dir);
1140 git_config_set_in_file(file_name.buf, "core.worktree",
1141 relative_path(real_work_tree, git_dir,
1142 &rel_path));
1144 strbuf_release(&file_name);
1145 strbuf_release(&rel_path);
1146 free((void *)real_work_tree);
1149 int parallel_submodules(void)
1151 return parallel_jobs;
1154 void prepare_submodule_repo_env(struct argv_array *out)
1156 const char * const *var;
1158 for (var = local_repo_env; *var; var++) {
1159 if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
1160 argv_array_push(out, *var);
1162 argv_array_push(out, "GIT_DIR=.git");