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1 | #include "cache.h" | |
2 | #include "submodule.h" | |
3 | #include "dir.h" | |
4 | #include "diff.h" | |
5 | #include "commit.h" | |
6 | #include "revision.h" | |
7 | #include "run-command.h" | |
8 | #include "diffcore.h" | |
9 | #include "refs.h" | |
10 | #include "string-list.h" | |
11 | #include "sha1-array.h" | |
12 | #include "argv-array.h" | |
13 | ||
14 | static struct string_list config_name_for_path; | |
15 | static struct string_list config_fetch_recurse_submodules_for_name; | |
16 | static struct string_list config_ignore_for_name; | |
17 | static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND; | |
18 | static struct string_list changed_submodule_paths; | |
19 | static int initialized_fetch_ref_tips; | |
20 | static struct sha1_array ref_tips_before_fetch; | |
21 | static struct sha1_array ref_tips_after_fetch; | |
22 | ||
23 | /* | |
24 | * The following flag is set if the .gitmodules file is unmerged. We then | |
25 | * disable recursion for all submodules where .git/config doesn't have a | |
26 | * matching config entry because we can't guess what might be configured in | |
27 | * .gitmodules unless the user resolves the conflict. When a command line | |
28 | * option is given (which always overrides configuration) this flag will be | |
29 | * ignored. | |
30 | */ | |
31 | static int gitmodules_is_unmerged; | |
32 | ||
33 | static int add_submodule_odb(const char *path) | |
34 | { | |
35 | struct strbuf objects_directory = STRBUF_INIT; | |
36 | struct alternate_object_database *alt_odb; | |
37 | int ret = 0; | |
38 | const char *git_dir; | |
39 | ||
40 | strbuf_addf(&objects_directory, "%s/.git", path); | |
41 | git_dir = read_gitfile(objects_directory.buf); | |
42 | if (git_dir) { | |
43 | strbuf_reset(&objects_directory); | |
44 | strbuf_addstr(&objects_directory, git_dir); | |
45 | } | |
46 | strbuf_addstr(&objects_directory, "/objects/"); | |
47 | if (!is_directory(objects_directory.buf)) { | |
48 | ret = -1; | |
49 | goto done; | |
50 | } | |
51 | /* avoid adding it twice */ | |
52 | for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next) | |
53 | if (alt_odb->name - alt_odb->base == objects_directory.len && | |
54 | !strncmp(alt_odb->base, objects_directory.buf, | |
55 | objects_directory.len)) | |
56 | goto done; | |
57 | ||
58 | alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb)); | |
59 | alt_odb->next = alt_odb_list; | |
60 | strcpy(alt_odb->base, objects_directory.buf); | |
61 | alt_odb->name = alt_odb->base + objects_directory.len; | |
62 | alt_odb->name[2] = '/'; | |
63 | alt_odb->name[40] = '\0'; | |
64 | alt_odb->name[41] = '\0'; | |
65 | alt_odb_list = alt_odb; | |
66 | ||
67 | /* add possible alternates from the submodule */ | |
68 | read_info_alternates(objects_directory.buf, 0); | |
69 | prepare_alt_odb(); | |
70 | done: | |
71 | strbuf_release(&objects_directory); | |
72 | return ret; | |
73 | } | |
74 | ||
75 | void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt, | |
76 | const char *path) | |
77 | { | |
78 | struct string_list_item *path_option, *ignore_option; | |
79 | path_option = unsorted_string_list_lookup(&config_name_for_path, path); | |
80 | if (path_option) { | |
81 | ignore_option = unsorted_string_list_lookup(&config_ignore_for_name, path_option->util); | |
82 | if (ignore_option) | |
83 | handle_ignore_submodules_arg(diffopt, ignore_option->util); | |
84 | else if (gitmodules_is_unmerged) | |
85 | DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES); | |
86 | } | |
87 | } | |
88 | ||
89 | int submodule_config(const char *var, const char *value, void *cb) | |
90 | { | |
91 | if (!prefixcmp(var, "submodule.")) | |
92 | return parse_submodule_config_option(var, value); | |
93 | else if (!strcmp(var, "fetch.recursesubmodules")) { | |
94 | config_fetch_recurse_submodules = parse_fetch_recurse_submodules_arg(var, value); | |
95 | return 0; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
100 | void gitmodules_config(void) | |
101 | { | |
102 | const char *work_tree = get_git_work_tree(); | |
103 | if (work_tree) { | |
104 | struct strbuf gitmodules_path = STRBUF_INIT; | |
105 | int pos; | |
106 | strbuf_addstr(&gitmodules_path, work_tree); | |
107 | strbuf_addstr(&gitmodules_path, "/.gitmodules"); | |
108 | if (read_cache() < 0) | |
109 | die("index file corrupt"); | |
110 | pos = cache_name_pos(".gitmodules", 11); | |
111 | if (pos < 0) { /* .gitmodules not found or isn't merged */ | |
112 | pos = -1 - pos; | |
113 | if (active_nr > pos) { /* there is a .gitmodules */ | |
114 | const struct cache_entry *ce = active_cache[pos]; | |
115 | if (ce_namelen(ce) == 11 && | |
116 | !memcmp(ce->name, ".gitmodules", 11)) | |
117 | gitmodules_is_unmerged = 1; | |
118 | } | |
119 | } | |
120 | ||
121 | if (!gitmodules_is_unmerged) | |
122 | git_config_from_file(submodule_config, gitmodules_path.buf, NULL); | |
123 | strbuf_release(&gitmodules_path); | |
124 | } | |
125 | } | |
126 | ||
127 | int parse_submodule_config_option(const char *var, const char *value) | |
128 | { | |
129 | struct string_list_item *config; | |
130 | const char *name, *key; | |
131 | int namelen; | |
132 | ||
133 | if (parse_config_key(var, "submodule", &name, &namelen, &key) < 0 || !name) | |
134 | return 0; | |
135 | ||
136 | if (!strcmp(key, "path")) { | |
137 | config = unsorted_string_list_lookup(&config_name_for_path, value); | |
138 | if (config) | |
139 | free(config->util); | |
140 | else | |
141 | config = string_list_append(&config_name_for_path, xstrdup(value)); | |
142 | config->util = xmemdupz(name, namelen); | |
143 | } else if (!strcmp(key, "fetchrecursesubmodules")) { | |
144 | char *name_cstr = xmemdupz(name, namelen); | |
145 | config = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name_cstr); | |
146 | if (!config) | |
147 | config = string_list_append(&config_fetch_recurse_submodules_for_name, name_cstr); | |
148 | else | |
149 | free(name_cstr); | |
150 | config->util = (void *)(intptr_t)parse_fetch_recurse_submodules_arg(var, value); | |
151 | } else if (!strcmp(key, "ignore")) { | |
152 | char *name_cstr; | |
153 | ||
154 | if (strcmp(value, "untracked") && strcmp(value, "dirty") && | |
155 | strcmp(value, "all") && strcmp(value, "none")) { | |
156 | warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | name_cstr = xmemdupz(name, namelen); | |
161 | config = unsorted_string_list_lookup(&config_ignore_for_name, name_cstr); | |
162 | if (config) { | |
163 | free(config->util); | |
164 | free(name_cstr); | |
165 | } else | |
166 | config = string_list_append(&config_ignore_for_name, name_cstr); | |
167 | config->util = xstrdup(value); | |
168 | return 0; | |
169 | } | |
170 | return 0; | |
171 | } | |
172 | ||
173 | void handle_ignore_submodules_arg(struct diff_options *diffopt, | |
174 | const char *arg) | |
175 | { | |
176 | DIFF_OPT_CLR(diffopt, IGNORE_SUBMODULES); | |
177 | DIFF_OPT_CLR(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES); | |
178 | DIFF_OPT_CLR(diffopt, IGNORE_DIRTY_SUBMODULES); | |
179 | ||
180 | if (!strcmp(arg, "all")) | |
181 | DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES); | |
182 | else if (!strcmp(arg, "untracked")) | |
183 | DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES); | |
184 | else if (!strcmp(arg, "dirty")) | |
185 | DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES); | |
186 | else if (strcmp(arg, "none")) | |
187 | die("bad --ignore-submodules argument: %s", arg); | |
188 | } | |
189 | ||
190 | static int prepare_submodule_summary(struct rev_info *rev, const char *path, | |
191 | struct commit *left, struct commit *right, | |
192 | int *fast_forward, int *fast_backward) | |
193 | { | |
194 | struct commit_list *merge_bases, *list; | |
195 | ||
196 | init_revisions(rev, NULL); | |
197 | setup_revisions(0, NULL, rev, NULL); | |
198 | rev->left_right = 1; | |
199 | rev->first_parent_only = 1; | |
200 | left->object.flags |= SYMMETRIC_LEFT; | |
201 | add_pending_object(rev, &left->object, path); | |
202 | add_pending_object(rev, &right->object, path); | |
203 | merge_bases = get_merge_bases(left, right, 1); | |
204 | if (merge_bases) { | |
205 | if (merge_bases->item == left) | |
206 | *fast_forward = 1; | |
207 | else if (merge_bases->item == right) | |
208 | *fast_backward = 1; | |
209 | } | |
210 | for (list = merge_bases; list; list = list->next) { | |
211 | list->item->object.flags |= UNINTERESTING; | |
212 | add_pending_object(rev, &list->item->object, | |
213 | sha1_to_hex(list->item->object.sha1)); | |
214 | } | |
215 | return prepare_revision_walk(rev); | |
216 | } | |
217 | ||
218 | static void print_submodule_summary(struct rev_info *rev, FILE *f, | |
219 | const char *line_prefix, | |
220 | const char *del, const char *add, const char *reset) | |
221 | { | |
222 | static const char format[] = " %m %s"; | |
223 | struct strbuf sb = STRBUF_INIT; | |
224 | struct commit *commit; | |
225 | ||
226 | while ((commit = get_revision(rev))) { | |
227 | struct pretty_print_context ctx = {0}; | |
228 | ctx.date_mode = rev->date_mode; | |
229 | ctx.output_encoding = get_log_output_encoding(); | |
230 | strbuf_setlen(&sb, 0); | |
231 | strbuf_addstr(&sb, line_prefix); | |
232 | if (commit->object.flags & SYMMETRIC_LEFT) { | |
233 | if (del) | |
234 | strbuf_addstr(&sb, del); | |
235 | } | |
236 | else if (add) | |
237 | strbuf_addstr(&sb, add); | |
238 | format_commit_message(commit, format, &sb, &ctx); | |
239 | if (reset) | |
240 | strbuf_addstr(&sb, reset); | |
241 | strbuf_addch(&sb, '\n'); | |
242 | fprintf(f, "%s", sb.buf); | |
243 | } | |
244 | strbuf_release(&sb); | |
245 | } | |
246 | ||
247 | int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg) | |
248 | { | |
249 | switch (git_config_maybe_bool(opt, arg)) { | |
250 | case 1: | |
251 | return RECURSE_SUBMODULES_ON; | |
252 | case 0: | |
253 | return RECURSE_SUBMODULES_OFF; | |
254 | default: | |
255 | if (!strcmp(arg, "on-demand")) | |
256 | return RECURSE_SUBMODULES_ON_DEMAND; | |
257 | die("bad %s argument: %s", opt, arg); | |
258 | } | |
259 | } | |
260 | ||
261 | void show_submodule_summary(FILE *f, const char *path, | |
262 | const char *line_prefix, | |
263 | unsigned char one[20], unsigned char two[20], | |
264 | unsigned dirty_submodule, const char *meta, | |
265 | const char *del, const char *add, const char *reset) | |
266 | { | |
267 | struct rev_info rev; | |
268 | struct commit *left = NULL, *right = NULL; | |
269 | const char *message = NULL; | |
270 | struct strbuf sb = STRBUF_INIT; | |
271 | int fast_forward = 0, fast_backward = 0; | |
272 | ||
273 | if (is_null_sha1(two)) | |
274 | message = "(submodule deleted)"; | |
275 | else if (add_submodule_odb(path)) | |
276 | message = "(not checked out)"; | |
277 | else if (is_null_sha1(one)) | |
278 | message = "(new submodule)"; | |
279 | else if (!(left = lookup_commit_reference(one)) || | |
280 | !(right = lookup_commit_reference(two))) | |
281 | message = "(commits not present)"; | |
282 | else if (prepare_submodule_summary(&rev, path, left, right, | |
283 | &fast_forward, &fast_backward)) | |
284 | message = "(revision walker failed)"; | |
285 | ||
286 | if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) | |
287 | fprintf(f, "%sSubmodule %s contains untracked content\n", | |
288 | line_prefix, path); | |
289 | if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED) | |
290 | fprintf(f, "%sSubmodule %s contains modified content\n", | |
291 | line_prefix, path); | |
292 | ||
293 | if (!hashcmp(one, two)) { | |
294 | strbuf_release(&sb); | |
295 | return; | |
296 | } | |
297 | ||
298 | strbuf_addf(&sb, "%s%sSubmodule %s %s..", line_prefix, meta, path, | |
299 | find_unique_abbrev(one, DEFAULT_ABBREV)); | |
300 | if (!fast_backward && !fast_forward) | |
301 | strbuf_addch(&sb, '.'); | |
302 | strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV)); | |
303 | if (message) | |
304 | strbuf_addf(&sb, " %s%s\n", message, reset); | |
305 | else | |
306 | strbuf_addf(&sb, "%s:%s\n", fast_backward ? " (rewind)" : "", reset); | |
307 | fwrite(sb.buf, sb.len, 1, f); | |
308 | ||
309 | if (!message) /* only NULL if we succeeded in setting up the walk */ | |
310 | print_submodule_summary(&rev, f, line_prefix, del, add, reset); | |
311 | if (left) | |
312 | clear_commit_marks(left, ~0); | |
313 | if (right) | |
314 | clear_commit_marks(right, ~0); | |
315 | ||
316 | strbuf_release(&sb); | |
317 | } | |
318 | ||
319 | void set_config_fetch_recurse_submodules(int value) | |
320 | { | |
321 | config_fetch_recurse_submodules = value; | |
322 | } | |
323 | ||
324 | static int has_remote(const char *refname, const unsigned char *sha1, int flags, void *cb_data) | |
325 | { | |
326 | return 1; | |
327 | } | |
328 | ||
329 | static int submodule_needs_pushing(const char *path, const unsigned char sha1[20]) | |
330 | { | |
331 | if (add_submodule_odb(path) || !lookup_commit_reference(sha1)) | |
332 | return 0; | |
333 | ||
334 | if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) { | |
335 | struct child_process cp; | |
336 | const char *argv[] = {"rev-list", NULL, "--not", "--remotes", "-n", "1" , NULL}; | |
337 | struct strbuf buf = STRBUF_INIT; | |
338 | int needs_pushing = 0; | |
339 | ||
340 | argv[1] = sha1_to_hex(sha1); | |
341 | memset(&cp, 0, sizeof(cp)); | |
342 | cp.argv = argv; | |
343 | cp.env = local_repo_env; | |
344 | cp.git_cmd = 1; | |
345 | cp.no_stdin = 1; | |
346 | cp.out = -1; | |
347 | cp.dir = path; | |
348 | if (start_command(&cp)) | |
349 | die("Could not run 'git rev-list %s --not --remotes -n 1' command in submodule %s", | |
350 | sha1_to_hex(sha1), path); | |
351 | if (strbuf_read(&buf, cp.out, 41)) | |
352 | needs_pushing = 1; | |
353 | finish_command(&cp); | |
354 | close(cp.out); | |
355 | strbuf_release(&buf); | |
356 | return needs_pushing; | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | static void collect_submodules_from_diff(struct diff_queue_struct *q, | |
363 | struct diff_options *options, | |
364 | void *data) | |
365 | { | |
366 | int i; | |
367 | struct string_list *needs_pushing = data; | |
368 | ||
369 | for (i = 0; i < q->nr; i++) { | |
370 | struct diff_filepair *p = q->queue[i]; | |
371 | if (!S_ISGITLINK(p->two->mode)) | |
372 | continue; | |
373 | if (submodule_needs_pushing(p->two->path, p->two->sha1)) | |
374 | string_list_insert(needs_pushing, p->two->path); | |
375 | } | |
376 | } | |
377 | ||
378 | static void find_unpushed_submodule_commits(struct commit *commit, | |
379 | struct string_list *needs_pushing) | |
380 | { | |
381 | struct rev_info rev; | |
382 | ||
383 | init_revisions(&rev, NULL); | |
384 | rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK; | |
385 | rev.diffopt.format_callback = collect_submodules_from_diff; | |
386 | rev.diffopt.format_callback_data = needs_pushing; | |
387 | diff_tree_combined_merge(commit, 1, &rev); | |
388 | } | |
389 | ||
390 | int find_unpushed_submodules(unsigned char new_sha1[20], | |
391 | const char *remotes_name, struct string_list *needs_pushing) | |
392 | { | |
393 | struct rev_info rev; | |
394 | struct commit *commit; | |
395 | const char *argv[] = {NULL, NULL, "--not", "NULL", NULL}; | |
396 | int argc = ARRAY_SIZE(argv) - 1; | |
397 | char *sha1_copy; | |
398 | ||
399 | struct strbuf remotes_arg = STRBUF_INIT; | |
400 | ||
401 | strbuf_addf(&remotes_arg, "--remotes=%s", remotes_name); | |
402 | init_revisions(&rev, NULL); | |
403 | sha1_copy = xstrdup(sha1_to_hex(new_sha1)); | |
404 | argv[1] = sha1_copy; | |
405 | argv[3] = remotes_arg.buf; | |
406 | setup_revisions(argc, argv, &rev, NULL); | |
407 | if (prepare_revision_walk(&rev)) | |
408 | die("revision walk setup failed"); | |
409 | ||
410 | while ((commit = get_revision(&rev)) != NULL) | |
411 | find_unpushed_submodule_commits(commit, needs_pushing); | |
412 | ||
413 | reset_revision_walk(); | |
414 | free(sha1_copy); | |
415 | strbuf_release(&remotes_arg); | |
416 | ||
417 | return needs_pushing->nr; | |
418 | } | |
419 | ||
420 | static int push_submodule(const char *path) | |
421 | { | |
422 | if (add_submodule_odb(path)) | |
423 | return 1; | |
424 | ||
425 | if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) { | |
426 | struct child_process cp; | |
427 | const char *argv[] = {"push", NULL}; | |
428 | ||
429 | memset(&cp, 0, sizeof(cp)); | |
430 | cp.argv = argv; | |
431 | cp.env = local_repo_env; | |
432 | cp.git_cmd = 1; | |
433 | cp.no_stdin = 1; | |
434 | cp.dir = path; | |
435 | if (run_command(&cp)) | |
436 | return 0; | |
437 | close(cp.out); | |
438 | } | |
439 | ||
440 | return 1; | |
441 | } | |
442 | ||
443 | int push_unpushed_submodules(unsigned char new_sha1[20], const char *remotes_name) | |
444 | { | |
445 | int i, ret = 1; | |
446 | struct string_list needs_pushing; | |
447 | ||
448 | memset(&needs_pushing, 0, sizeof(struct string_list)); | |
449 | needs_pushing.strdup_strings = 1; | |
450 | ||
451 | if (!find_unpushed_submodules(new_sha1, remotes_name, &needs_pushing)) | |
452 | return 1; | |
453 | ||
454 | for (i = 0; i < needs_pushing.nr; i++) { | |
455 | const char *path = needs_pushing.items[i].string; | |
456 | fprintf(stderr, "Pushing submodule '%s'\n", path); | |
457 | if (!push_submodule(path)) { | |
458 | fprintf(stderr, "Unable to push submodule '%s'\n", path); | |
459 | ret = 0; | |
460 | } | |
461 | } | |
462 | ||
463 | string_list_clear(&needs_pushing, 0); | |
464 | ||
465 | return ret; | |
466 | } | |
467 | ||
468 | static int is_submodule_commit_present(const char *path, unsigned char sha1[20]) | |
469 | { | |
470 | int is_present = 0; | |
471 | if (!add_submodule_odb(path) && lookup_commit_reference(sha1)) { | |
472 | /* Even if the submodule is checked out and the commit is | |
473 | * present, make sure it is reachable from a ref. */ | |
474 | struct child_process cp; | |
475 | const char *argv[] = {"rev-list", "-n", "1", NULL, "--not", "--all", NULL}; | |
476 | struct strbuf buf = STRBUF_INIT; | |
477 | ||
478 | argv[3] = sha1_to_hex(sha1); | |
479 | memset(&cp, 0, sizeof(cp)); | |
480 | cp.argv = argv; | |
481 | cp.env = local_repo_env; | |
482 | cp.git_cmd = 1; | |
483 | cp.no_stdin = 1; | |
484 | cp.out = -1; | |
485 | cp.dir = path; | |
486 | if (!run_command(&cp) && !strbuf_read(&buf, cp.out, 1024)) | |
487 | is_present = 1; | |
488 | ||
489 | close(cp.out); | |
490 | strbuf_release(&buf); | |
491 | } | |
492 | return is_present; | |
493 | } | |
494 | ||
495 | static void submodule_collect_changed_cb(struct diff_queue_struct *q, | |
496 | struct diff_options *options, | |
497 | void *data) | |
498 | { | |
499 | int i; | |
500 | for (i = 0; i < q->nr; i++) { | |
501 | struct diff_filepair *p = q->queue[i]; | |
502 | if (!S_ISGITLINK(p->two->mode)) | |
503 | continue; | |
504 | ||
505 | if (S_ISGITLINK(p->one->mode)) { | |
506 | /* NEEDSWORK: We should honor the name configured in | |
507 | * the .gitmodules file of the commit we are examining | |
508 | * here to be able to correctly follow submodules | |
509 | * being moved around. */ | |
510 | struct string_list_item *path; | |
511 | path = unsorted_string_list_lookup(&changed_submodule_paths, p->two->path); | |
512 | if (!path && !is_submodule_commit_present(p->two->path, p->two->sha1)) | |
513 | string_list_append(&changed_submodule_paths, xstrdup(p->two->path)); | |
514 | } else { | |
515 | /* Submodule is new or was moved here */ | |
516 | /* NEEDSWORK: When the .git directories of submodules | |
517 | * live inside the superprojects .git directory some | |
518 | * day we should fetch new submodules directly into | |
519 | * that location too when config or options request | |
520 | * that so they can be checked out from there. */ | |
521 | continue; | |
522 | } | |
523 | } | |
524 | } | |
525 | ||
526 | static int add_sha1_to_array(const char *ref, const unsigned char *sha1, | |
527 | int flags, void *data) | |
528 | { | |
529 | sha1_array_append(data, sha1); | |
530 | return 0; | |
531 | } | |
532 | ||
533 | void check_for_new_submodule_commits(unsigned char new_sha1[20]) | |
534 | { | |
535 | if (!initialized_fetch_ref_tips) { | |
536 | for_each_ref(add_sha1_to_array, &ref_tips_before_fetch); | |
537 | initialized_fetch_ref_tips = 1; | |
538 | } | |
539 | ||
540 | sha1_array_append(&ref_tips_after_fetch, new_sha1); | |
541 | } | |
542 | ||
543 | static void add_sha1_to_argv(const unsigned char sha1[20], void *data) | |
544 | { | |
545 | argv_array_push(data, sha1_to_hex(sha1)); | |
546 | } | |
547 | ||
548 | static void calculate_changed_submodule_paths(void) | |
549 | { | |
550 | struct rev_info rev; | |
551 | struct commit *commit; | |
552 | struct argv_array argv = ARGV_ARRAY_INIT; | |
553 | ||
554 | /* No need to check if there are no submodules configured */ | |
555 | if (!config_name_for_path.nr) | |
556 | return; | |
557 | ||
558 | init_revisions(&rev, NULL); | |
559 | argv_array_push(&argv, "--"); /* argv[0] program name */ | |
560 | sha1_array_for_each_unique(&ref_tips_after_fetch, | |
561 | add_sha1_to_argv, &argv); | |
562 | argv_array_push(&argv, "--not"); | |
563 | sha1_array_for_each_unique(&ref_tips_before_fetch, | |
564 | add_sha1_to_argv, &argv); | |
565 | setup_revisions(argv.argc, argv.argv, &rev, NULL); | |
566 | if (prepare_revision_walk(&rev)) | |
567 | die("revision walk setup failed"); | |
568 | ||
569 | /* | |
570 | * Collect all submodules (whether checked out or not) for which new | |
571 | * commits have been recorded upstream in "changed_submodule_paths". | |
572 | */ | |
573 | while ((commit = get_revision(&rev))) { | |
574 | struct commit_list *parent = commit->parents; | |
575 | while (parent) { | |
576 | struct diff_options diff_opts; | |
577 | diff_setup(&diff_opts); | |
578 | DIFF_OPT_SET(&diff_opts, RECURSIVE); | |
579 | diff_opts.output_format |= DIFF_FORMAT_CALLBACK; | |
580 | diff_opts.format_callback = submodule_collect_changed_cb; | |
581 | diff_setup_done(&diff_opts); | |
582 | diff_tree_sha1(parent->item->object.sha1, commit->object.sha1, "", &diff_opts); | |
583 | diffcore_std(&diff_opts); | |
584 | diff_flush(&diff_opts); | |
585 | parent = parent->next; | |
586 | } | |
587 | } | |
588 | ||
589 | argv_array_clear(&argv); | |
590 | sha1_array_clear(&ref_tips_before_fetch); | |
591 | sha1_array_clear(&ref_tips_after_fetch); | |
592 | initialized_fetch_ref_tips = 0; | |
593 | } | |
594 | ||
595 | int fetch_populated_submodules(const struct argv_array *options, | |
596 | const char *prefix, int command_line_option, | |
597 | int quiet) | |
598 | { | |
599 | int i, result = 0; | |
600 | struct child_process cp; | |
601 | struct argv_array argv = ARGV_ARRAY_INIT; | |
602 | struct string_list_item *name_for_path; | |
603 | const char *work_tree = get_git_work_tree(); | |
604 | if (!work_tree) | |
605 | goto out; | |
606 | ||
607 | if (read_cache() < 0) | |
608 | die("index file corrupt"); | |
609 | ||
610 | argv_array_push(&argv, "fetch"); | |
611 | for (i = 0; i < options->argc; i++) | |
612 | argv_array_push(&argv, options->argv[i]); | |
613 | argv_array_push(&argv, "--recurse-submodules-default"); | |
614 | /* default value, "--submodule-prefix" and its value are added later */ | |
615 | ||
616 | memset(&cp, 0, sizeof(cp)); | |
617 | cp.env = local_repo_env; | |
618 | cp.git_cmd = 1; | |
619 | cp.no_stdin = 1; | |
620 | ||
621 | calculate_changed_submodule_paths(); | |
622 | ||
623 | for (i = 0; i < active_nr; i++) { | |
624 | struct strbuf submodule_path = STRBUF_INIT; | |
625 | struct strbuf submodule_git_dir = STRBUF_INIT; | |
626 | struct strbuf submodule_prefix = STRBUF_INIT; | |
627 | struct cache_entry *ce = active_cache[i]; | |
628 | const char *git_dir, *name, *default_argv; | |
629 | ||
630 | if (!S_ISGITLINK(ce->ce_mode)) | |
631 | continue; | |
632 | ||
633 | name = ce->name; | |
634 | name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name); | |
635 | if (name_for_path) | |
636 | name = name_for_path->util; | |
637 | ||
638 | default_argv = "yes"; | |
639 | if (command_line_option == RECURSE_SUBMODULES_DEFAULT) { | |
640 | struct string_list_item *fetch_recurse_submodules_option; | |
641 | fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name); | |
642 | if (fetch_recurse_submodules_option) { | |
643 | if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_OFF) | |
644 | continue; | |
645 | if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_ON_DEMAND) { | |
646 | if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name)) | |
647 | continue; | |
648 | default_argv = "on-demand"; | |
649 | } | |
650 | } else { | |
651 | if ((config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF) || | |
652 | gitmodules_is_unmerged) | |
653 | continue; | |
654 | if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) { | |
655 | if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name)) | |
656 | continue; | |
657 | default_argv = "on-demand"; | |
658 | } | |
659 | } | |
660 | } else if (command_line_option == RECURSE_SUBMODULES_ON_DEMAND) { | |
661 | if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name)) | |
662 | continue; | |
663 | default_argv = "on-demand"; | |
664 | } | |
665 | ||
666 | strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name); | |
667 | strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf); | |
668 | strbuf_addf(&submodule_prefix, "%s%s/", prefix, ce->name); | |
669 | git_dir = read_gitfile(submodule_git_dir.buf); | |
670 | if (!git_dir) | |
671 | git_dir = submodule_git_dir.buf; | |
672 | if (is_directory(git_dir)) { | |
673 | if (!quiet) | |
674 | printf("Fetching submodule %s%s\n", prefix, ce->name); | |
675 | cp.dir = submodule_path.buf; | |
676 | argv_array_push(&argv, default_argv); | |
677 | argv_array_push(&argv, "--submodule-prefix"); | |
678 | argv_array_push(&argv, submodule_prefix.buf); | |
679 | cp.argv = argv.argv; | |
680 | if (run_command(&cp)) | |
681 | result = 1; | |
682 | argv_array_pop(&argv); | |
683 | argv_array_pop(&argv); | |
684 | argv_array_pop(&argv); | |
685 | } | |
686 | strbuf_release(&submodule_path); | |
687 | strbuf_release(&submodule_git_dir); | |
688 | strbuf_release(&submodule_prefix); | |
689 | } | |
690 | argv_array_clear(&argv); | |
691 | out: | |
692 | string_list_clear(&changed_submodule_paths, 1); | |
693 | return result; | |
694 | } | |
695 | ||
696 | unsigned is_submodule_modified(const char *path, int ignore_untracked) | |
697 | { | |
698 | ssize_t len; | |
699 | struct child_process cp; | |
700 | const char *argv[] = { | |
701 | "status", | |
702 | "--porcelain", | |
703 | NULL, | |
704 | NULL, | |
705 | }; | |
706 | struct strbuf buf = STRBUF_INIT; | |
707 | unsigned dirty_submodule = 0; | |
708 | const char *line, *next_line; | |
709 | const char *git_dir; | |
710 | ||
711 | strbuf_addf(&buf, "%s/.git", path); | |
712 | git_dir = read_gitfile(buf.buf); | |
713 | if (!git_dir) | |
714 | git_dir = buf.buf; | |
715 | if (!is_directory(git_dir)) { | |
716 | strbuf_release(&buf); | |
717 | /* The submodule is not checked out, so it is not modified */ | |
718 | return 0; | |
719 | ||
720 | } | |
721 | strbuf_reset(&buf); | |
722 | ||
723 | if (ignore_untracked) | |
724 | argv[2] = "-uno"; | |
725 | ||
726 | memset(&cp, 0, sizeof(cp)); | |
727 | cp.argv = argv; | |
728 | cp.env = local_repo_env; | |
729 | cp.git_cmd = 1; | |
730 | cp.no_stdin = 1; | |
731 | cp.out = -1; | |
732 | cp.dir = path; | |
733 | if (start_command(&cp)) | |
734 | die("Could not run 'git status --porcelain' in submodule %s", path); | |
735 | ||
736 | len = strbuf_read(&buf, cp.out, 1024); | |
737 | line = buf.buf; | |
738 | while (len > 2) { | |
739 | if ((line[0] == '?') && (line[1] == '?')) { | |
740 | dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED; | |
741 | if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED) | |
742 | break; | |
743 | } else { | |
744 | dirty_submodule |= DIRTY_SUBMODULE_MODIFIED; | |
745 | if (ignore_untracked || | |
746 | (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)) | |
747 | break; | |
748 | } | |
749 | next_line = strchr(line, '\n'); | |
750 | if (!next_line) | |
751 | break; | |
752 | next_line++; | |
753 | len -= (next_line - line); | |
754 | line = next_line; | |
755 | } | |
756 | close(cp.out); | |
757 | ||
758 | if (finish_command(&cp)) | |
759 | die("'git status --porcelain' failed in submodule %s", path); | |
760 | ||
761 | strbuf_release(&buf); | |
762 | return dirty_submodule; | |
763 | } | |
764 | ||
765 | int submodule_uses_gitfile(const char *path) | |
766 | { | |
767 | struct child_process cp; | |
768 | const char *argv[] = { | |
769 | "submodule", | |
770 | "foreach", | |
771 | "--quiet", | |
772 | "--recursive", | |
773 | "test -f .git", | |
774 | NULL, | |
775 | }; | |
776 | struct strbuf buf = STRBUF_INIT; | |
777 | const char *git_dir; | |
778 | ||
779 | strbuf_addf(&buf, "%s/.git", path); | |
780 | git_dir = read_gitfile(buf.buf); | |
781 | if (!git_dir) { | |
782 | strbuf_release(&buf); | |
783 | return 0; | |
784 | } | |
785 | strbuf_release(&buf); | |
786 | ||
787 | /* Now test that all nested submodules use a gitfile too */ | |
788 | memset(&cp, 0, sizeof(cp)); | |
789 | cp.argv = argv; | |
790 | cp.env = local_repo_env; | |
791 | cp.git_cmd = 1; | |
792 | cp.no_stdin = 1; | |
793 | cp.no_stderr = 1; | |
794 | cp.no_stdout = 1; | |
795 | cp.dir = path; | |
796 | if (run_command(&cp)) | |
797 | return 0; | |
798 | ||
799 | return 1; | |
800 | } | |
801 | ||
802 | int ok_to_remove_submodule(const char *path) | |
803 | { | |
804 | struct stat st; | |
805 | ssize_t len; | |
806 | struct child_process cp; | |
807 | const char *argv[] = { | |
808 | "status", | |
809 | "--porcelain", | |
810 | "-u", | |
811 | "--ignore-submodules=none", | |
812 | NULL, | |
813 | }; | |
814 | struct strbuf buf = STRBUF_INIT; | |
815 | int ok_to_remove = 1; | |
816 | ||
817 | if ((lstat(path, &st) < 0) || is_empty_dir(path)) | |
818 | return 1; | |
819 | ||
820 | if (!submodule_uses_gitfile(path)) | |
821 | return 0; | |
822 | ||
823 | memset(&cp, 0, sizeof(cp)); | |
824 | cp.argv = argv; | |
825 | cp.env = local_repo_env; | |
826 | cp.git_cmd = 1; | |
827 | cp.no_stdin = 1; | |
828 | cp.out = -1; | |
829 | cp.dir = path; | |
830 | if (start_command(&cp)) | |
831 | die("Could not run 'git status --porcelain -uall --ignore-submodules=none' in submodule %s", path); | |
832 | ||
833 | len = strbuf_read(&buf, cp.out, 1024); | |
834 | if (len > 2) | |
835 | ok_to_remove = 0; | |
836 | close(cp.out); | |
837 | ||
838 | if (finish_command(&cp)) | |
839 | die("'git status --porcelain -uall --ignore-submodules=none' failed in submodule %s", path); | |
840 | ||
841 | strbuf_release(&buf); | |
842 | return ok_to_remove; | |
843 | } | |
844 | ||
845 | static int find_first_merges(struct object_array *result, const char *path, | |
846 | struct commit *a, struct commit *b) | |
847 | { | |
848 | int i, j; | |
849 | struct object_array merges = OBJECT_ARRAY_INIT; | |
850 | struct commit *commit; | |
851 | int contains_another; | |
852 | ||
853 | char merged_revision[42]; | |
854 | const char *rev_args[] = { "rev-list", "--merges", "--ancestry-path", | |
855 | "--all", merged_revision, NULL }; | |
856 | struct rev_info revs; | |
857 | struct setup_revision_opt rev_opts; | |
858 | ||
859 | memset(result, 0, sizeof(struct object_array)); | |
860 | memset(&rev_opts, 0, sizeof(rev_opts)); | |
861 | ||
862 | /* get all revisions that merge commit a */ | |
863 | snprintf(merged_revision, sizeof(merged_revision), "^%s", | |
864 | sha1_to_hex(a->object.sha1)); | |
865 | init_revisions(&revs, NULL); | |
866 | rev_opts.submodule = path; | |
867 | setup_revisions(sizeof(rev_args)/sizeof(char *)-1, rev_args, &revs, &rev_opts); | |
868 | ||
869 | /* save all revisions from the above list that contain b */ | |
870 | if (prepare_revision_walk(&revs)) | |
871 | die("revision walk setup failed"); | |
872 | while ((commit = get_revision(&revs)) != NULL) { | |
873 | struct object *o = &(commit->object); | |
874 | if (in_merge_bases(b, commit)) | |
875 | add_object_array(o, NULL, &merges); | |
876 | } | |
877 | reset_revision_walk(); | |
878 | ||
879 | /* Now we've got all merges that contain a and b. Prune all | |
880 | * merges that contain another found merge and save them in | |
881 | * result. | |
882 | */ | |
883 | for (i = 0; i < merges.nr; i++) { | |
884 | struct commit *m1 = (struct commit *) merges.objects[i].item; | |
885 | ||
886 | contains_another = 0; | |
887 | for (j = 0; j < merges.nr; j++) { | |
888 | struct commit *m2 = (struct commit *) merges.objects[j].item; | |
889 | if (i != j && in_merge_bases(m2, m1)) { | |
890 | contains_another = 1; | |
891 | break; | |
892 | } | |
893 | } | |
894 | ||
895 | if (!contains_another) | |
896 | add_object_array(merges.objects[i].item, NULL, result); | |
897 | } | |
898 | ||
899 | free(merges.objects); | |
900 | return result->nr; | |
901 | } | |
902 | ||
903 | static void print_commit(struct commit *commit) | |
904 | { | |
905 | struct strbuf sb = STRBUF_INIT; | |
906 | struct pretty_print_context ctx = {0}; | |
907 | ctx.date_mode = DATE_NORMAL; | |
908 | format_commit_message(commit, " %h: %m %s", &sb, &ctx); | |
909 | fprintf(stderr, "%s\n", sb.buf); | |
910 | strbuf_release(&sb); | |
911 | } | |
912 | ||
913 | #define MERGE_WARNING(path, msg) \ | |
914 | warning("Failed to merge submodule %s (%s)", path, msg); | |
915 | ||
916 | int merge_submodule(unsigned char result[20], const char *path, | |
917 | const unsigned char base[20], const unsigned char a[20], | |
918 | const unsigned char b[20], int search) | |
919 | { | |
920 | struct commit *commit_base, *commit_a, *commit_b; | |
921 | int parent_count; | |
922 | struct object_array merges; | |
923 | ||
924 | int i; | |
925 | ||
926 | /* store a in result in case we fail */ | |
927 | hashcpy(result, a); | |
928 | ||
929 | /* we can not handle deletion conflicts */ | |
930 | if (is_null_sha1(base)) | |
931 | return 0; | |
932 | if (is_null_sha1(a)) | |
933 | return 0; | |
934 | if (is_null_sha1(b)) | |
935 | return 0; | |
936 | ||
937 | if (add_submodule_odb(path)) { | |
938 | MERGE_WARNING(path, "not checked out"); | |
939 | return 0; | |
940 | } | |
941 | ||
942 | if (!(commit_base = lookup_commit_reference(base)) || | |
943 | !(commit_a = lookup_commit_reference(a)) || | |
944 | !(commit_b = lookup_commit_reference(b))) { | |
945 | MERGE_WARNING(path, "commits not present"); | |
946 | return 0; | |
947 | } | |
948 | ||
949 | /* check whether both changes are forward */ | |
950 | if (!in_merge_bases(commit_base, commit_a) || | |
951 | !in_merge_bases(commit_base, commit_b)) { | |
952 | MERGE_WARNING(path, "commits don't follow merge-base"); | |
953 | return 0; | |
954 | } | |
955 | ||
956 | /* Case #1: a is contained in b or vice versa */ | |
957 | if (in_merge_bases(commit_a, commit_b)) { | |
958 | hashcpy(result, b); | |
959 | return 1; | |
960 | } | |
961 | if (in_merge_bases(commit_b, commit_a)) { | |
962 | hashcpy(result, a); | |
963 | return 1; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Case #2: There are one or more merges that contain a and b in | |
968 | * the submodule. If there is only one, then present it as a | |
969 | * suggestion to the user, but leave it marked unmerged so the | |
970 | * user needs to confirm the resolution. | |
971 | */ | |
972 | ||
973 | /* Skip the search if makes no sense to the calling context. */ | |
974 | if (!search) | |
975 | return 0; | |
976 | ||
977 | /* find commit which merges them */ | |
978 | parent_count = find_first_merges(&merges, path, commit_a, commit_b); | |
979 | switch (parent_count) { | |
980 | case 0: | |
981 | MERGE_WARNING(path, "merge following commits not found"); | |
982 | break; | |
983 | ||
984 | case 1: | |
985 | MERGE_WARNING(path, "not fast-forward"); | |
986 | fprintf(stderr, "Found a possible merge resolution " | |
987 | "for the submodule:\n"); | |
988 | print_commit((struct commit *) merges.objects[0].item); | |
989 | fprintf(stderr, | |
990 | "If this is correct simply add it to the index " | |
991 | "for example\n" | |
992 | "by using:\n\n" | |
993 | " git update-index --cacheinfo 160000 %s \"%s\"\n\n" | |
994 | "which will accept this suggestion.\n", | |
995 | sha1_to_hex(merges.objects[0].item->sha1), path); | |
996 | break; | |
997 | ||
998 | default: | |
999 | MERGE_WARNING(path, "multiple merges found"); | |
1000 | for (i = 0; i < merges.nr; i++) | |
1001 | print_commit((struct commit *) merges.objects[i].item); | |
1002 | } | |
1003 | ||
1004 | free(merges.objects); | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | /* Update gitfile and core.worktree setting to connect work tree and git dir */ | |
1009 | void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir) | |
1010 | { | |
1011 | struct strbuf file_name = STRBUF_INIT; | |
1012 | struct strbuf rel_path = STRBUF_INIT; | |
1013 | const char *real_work_tree = xstrdup(real_path(work_tree)); | |
1014 | FILE *fp; | |
1015 | ||
1016 | /* Update gitfile */ | |
1017 | strbuf_addf(&file_name, "%s/.git", work_tree); | |
1018 | fp = fopen(file_name.buf, "w"); | |
1019 | if (!fp) | |
1020 | die(_("Could not create git link %s"), file_name.buf); | |
1021 | fprintf(fp, "gitdir: %s\n", relative_path(git_dir, real_work_tree, | |
1022 | &rel_path)); | |
1023 | fclose(fp); | |
1024 | ||
1025 | /* Update core.worktree setting */ | |
1026 | strbuf_reset(&file_name); | |
1027 | strbuf_addf(&file_name, "%s/config", git_dir); | |
1028 | if (git_config_set_in_file(file_name.buf, "core.worktree", | |
1029 | relative_path(real_work_tree, git_dir, | |
1030 | &rel_path))) | |
1031 | die(_("Could not set core.worktree in %s"), | |
1032 | file_name.buf); | |
1033 | ||
1034 | strbuf_release(&file_name); | |
1035 | strbuf_release(&rel_path); | |
1036 | free((void *)real_work_tree); | |
1037 | } |