1#include "builtin.h"
2#include "cache.h"
3#include "parse-options.h"
4#include "quote.h"
5#include "pathspec.h"
6#include "dir.h"
7#include "utf8.h"
8#include "submodule.h"
9#include "submodule-config.h"
10#include "string-list.h"
11#include "run-command.h"
12
13struct module_list {
14 const struct cache_entry **entries;
15 int alloc, nr;
16};
17#define MODULE_LIST_INIT { NULL, 0, 0 }
18
19static int module_list_compute(int argc, const char **argv,
20 const char *prefix,
21 struct pathspec *pathspec,
22 struct module_list *list)
23{
24 int i, result = 0;
25 char *max_prefix, *ps_matched = NULL;
26 int max_prefix_len;
27 parse_pathspec(pathspec, 0,
28 PATHSPEC_PREFER_FULL |
29 PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
30 prefix, argv);
31
32 /* Find common prefix for all pathspec's */
33 max_prefix = common_prefix(pathspec);
34 max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
35
36 if (pathspec->nr)
37 ps_matched = xcalloc(pathspec->nr, 1);
38
39 if (read_cache() < 0)
40 die(_("index file corrupt"));
41
42 for (i = 0; i < active_nr; i++) {
43 const struct cache_entry *ce = active_cache[i];
44
45 if (!S_ISGITLINK(ce->ce_mode) ||
46 !match_pathspec(pathspec, ce->name, ce_namelen(ce),
47 max_prefix_len, ps_matched, 1))
48 continue;
49
50 ALLOC_GROW(list->entries, list->nr + 1, list->alloc);
51 list->entries[list->nr++] = ce;
52 while (i + 1 < active_nr &&
53 !strcmp(ce->name, active_cache[i + 1]->name))
54 /*
55 * Skip entries with the same name in different stages
56 * to make sure an entry is returned only once.
57 */
58 i++;
59 }
60 free(max_prefix);
61
62 if (ps_matched && report_path_error(ps_matched, pathspec, prefix))
63 result = -1;
64
65 free(ps_matched);
66
67 return result;
68}
69
70static int module_list(int argc, const char **argv, const char *prefix)
71{
72 int i;
73 struct pathspec pathspec;
74 struct module_list list = MODULE_LIST_INIT;
75
76 struct option module_list_options[] = {
77 OPT_STRING(0, "prefix", &prefix,
78 N_("path"),
79 N_("alternative anchor for relative paths")),
80 OPT_END()
81 };
82
83 const char *const git_submodule_helper_usage[] = {
84 N_("git submodule--helper list [--prefix=<path>] [<path>...]"),
85 NULL
86 };
87
88 argc = parse_options(argc, argv, prefix, module_list_options,
89 git_submodule_helper_usage, 0);
90
91 if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0) {
92 printf("#unmatched\n");
93 return 1;
94 }
95
96 for (i = 0; i < list.nr; i++) {
97 const struct cache_entry *ce = list.entries[i];
98
99 if (ce_stage(ce))
100 printf("%06o %s U\t", ce->ce_mode, sha1_to_hex(null_sha1));
101 else
102 printf("%06o %s %d\t", ce->ce_mode, sha1_to_hex(ce->sha1), ce_stage(ce));
103
104 utf8_fprintf(stdout, "%s\n", ce->name);
105 }
106 return 0;
107}
108
109static int module_name(int argc, const char **argv, const char *prefix)
110{
111 const struct submodule *sub;
112
113 if (argc != 2)
114 usage(_("git submodule--helper name <path>"));
115
116 gitmodules_config();
117 sub = submodule_from_path(null_sha1, argv[1]);
118
119 if (!sub)
120 die(_("no submodule mapping found in .gitmodules for path '%s'"),
121 argv[1]);
122
123 printf("%s\n", sub->name);
124
125 return 0;
126}
127static int clone_submodule(const char *path, const char *gitdir, const char *url,
128 const char *depth, const char *reference, int quiet)
129{
130 struct child_process cp;
131 child_process_init(&cp);
132
133 argv_array_push(&cp.args, "clone");
134 argv_array_push(&cp.args, "--no-checkout");
135 if (quiet)
136 argv_array_push(&cp.args, "--quiet");
137 if (depth && *depth)
138 argv_array_pushl(&cp.args, "--depth", depth, NULL);
139 if (reference && *reference)
140 argv_array_pushl(&cp.args, "--reference", reference, NULL);
141 if (gitdir && *gitdir)
142 argv_array_pushl(&cp.args, "--separate-git-dir", gitdir, NULL);
143
144 argv_array_push(&cp.args, url);
145 argv_array_push(&cp.args, path);
146
147 cp.git_cmd = 1;
148 cp.env = local_repo_env;
149 cp.no_stdin = 1;
150
151 return run_command(&cp);
152}
153
154static int module_clone(int argc, const char **argv, const char *prefix)
155{
156 const char *name = NULL, *url = NULL;
157 const char *reference = NULL, *depth = NULL;
158 int quiet = 0;
159 FILE *submodule_dot_git;
160 char *p, *path = NULL, *sm_gitdir;
161 struct strbuf rel_path = STRBUF_INIT;
162 struct strbuf sb = STRBUF_INIT;
163
164 struct option module_clone_options[] = {
165 OPT_STRING(0, "prefix", &prefix,
166 N_("path"),
167 N_("alternative anchor for relative paths")),
168 OPT_STRING(0, "path", &path,
169 N_("path"),
170 N_("where the new submodule will be cloned to")),
171 OPT_STRING(0, "name", &name,
172 N_("string"),
173 N_("name of the new submodule")),
174 OPT_STRING(0, "url", &url,
175 N_("string"),
176 N_("url where to clone the submodule from")),
177 OPT_STRING(0, "reference", &reference,
178 N_("string"),
179 N_("reference repository")),
180 OPT_STRING(0, "depth", &depth,
181 N_("string"),
182 N_("depth for shallow clones")),
183 OPT__QUIET(&quiet, "Suppress output for cloning a submodule"),
184 OPT_END()
185 };
186
187 const char *const git_submodule_helper_usage[] = {
188 N_("git submodule--helper clone [--prefix=<path>] [--quiet] "
189 "[--reference <repository>] [--name <name>] [--url <url>]"
190 "[--depth <depth>] [--] [<path>...]"),
191 NULL
192 };
193
194 argc = parse_options(argc, argv, prefix, module_clone_options,
195 git_submodule_helper_usage, 0);
196
197 if (!path || !*path)
198 die(_("submodule--helper: unspecified or empty --path"));
199
200 strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
201 sm_gitdir = xstrdup(absolute_path(sb.buf));
202 strbuf_reset(&sb);
203
204 if (!is_absolute_path(path)) {
205 strbuf_addf(&sb, "%s/%s", get_git_work_tree(), path);
206 path = strbuf_detach(&sb, NULL);
207 } else
208 path = xstrdup(path);
209
210 if (!file_exists(sm_gitdir)) {
211 if (safe_create_leading_directories_const(sm_gitdir) < 0)
212 die(_("could not create directory '%s'"), sm_gitdir);
213 if (clone_submodule(path, sm_gitdir, url, depth, reference, quiet))
214 die(_("clone of '%s' into submodule path '%s' failed"),
215 url, path);
216 } else {
217 if (safe_create_leading_directories_const(path) < 0)
218 die(_("could not create directory '%s'"), path);
219 strbuf_addf(&sb, "%s/index", sm_gitdir);
220 unlink_or_warn(sb.buf);
221 strbuf_reset(&sb);
222 }
223
224 /* Write a .git file in the submodule to redirect to the superproject. */
225 strbuf_addf(&sb, "%s/.git", path);
226 if (safe_create_leading_directories_const(sb.buf) < 0)
227 die(_("could not create leading directories of '%s'"), sb.buf);
228 submodule_dot_git = fopen(sb.buf, "w");
229 if (!submodule_dot_git)
230 die_errno(_("cannot open file '%s'"), sb.buf);
231
232 fprintf_or_die(submodule_dot_git, "gitdir: %s\n",
233 relative_path(sm_gitdir, path, &rel_path));
234 if (fclose(submodule_dot_git))
235 die(_("could not close file %s"), sb.buf);
236 strbuf_reset(&sb);
237 strbuf_reset(&rel_path);
238
239 /* Redirect the worktree of the submodule in the superproject's config */
240 p = git_pathdup_submodule(path, "config");
241 if (!p)
242 die(_("could not get submodule directory for '%s'"), path);
243 git_config_set_in_file(p, "core.worktree",
244 relative_path(path, sm_gitdir, &rel_path));
245 strbuf_release(&sb);
246 strbuf_release(&rel_path);
247 free(sm_gitdir);
248 free(path);
249 free(p);
250 return 0;
251}
252
253struct submodule_update_clone {
254 /* index into 'list', the list of submodules to look into for cloning */
255 int current;
256 struct module_list list;
257 unsigned warn_if_uninitialized : 1;
258
259 /* update parameter passed via commandline */
260 struct submodule_update_strategy update;
261
262 /* configuration parameters which are passed on to the children */
263 int quiet;
264 const char *reference;
265 const char *depth;
266 const char *recursive_prefix;
267 const char *prefix;
268
269 /* Machine-readable status lines to be consumed by git-submodule.sh */
270 struct string_list projectlines;
271
272 /* If we want to stop as fast as possible and return an error */
273 unsigned quickstop : 1;
274};
275#define SUBMODULE_UPDATE_CLONE_INIT {0, MODULE_LIST_INIT, 0, \
276 SUBMODULE_UPDATE_STRATEGY_INIT, 0, NULL, NULL, NULL, NULL, \
277 STRING_LIST_INIT_DUP, 0}
278
279/**
280 * Determine whether 'ce' needs to be cloned. If so, prepare the 'child' to
281 * run the clone. Returns 1 if 'ce' needs to be cloned, 0 otherwise.
282 */
283static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
284 struct child_process *child,
285 struct submodule_update_clone *suc,
286 struct strbuf *out)
287{
288 const struct submodule *sub = NULL;
289 struct strbuf displaypath_sb = STRBUF_INIT;
290 struct strbuf sb = STRBUF_INIT;
291 const char *displaypath = NULL;
292 char *url = NULL;
293 int needs_cloning = 0;
294
295 if (ce_stage(ce)) {
296 if (suc->recursive_prefix)
297 strbuf_addf(&sb, "%s/%s", suc->recursive_prefix, ce->name);
298 else
299 strbuf_addf(&sb, "%s", ce->name);
300 strbuf_addf(out, _("Skipping unmerged submodule %s"), sb.buf);
301 strbuf_addch(out, '\n');
302 goto cleanup;
303 }
304
305 sub = submodule_from_path(null_sha1, ce->name);
306
307 if (suc->recursive_prefix)
308 displaypath = relative_path(suc->recursive_prefix,
309 ce->name, &displaypath_sb);
310 else
311 displaypath = ce->name;
312
313 if (suc->update.type == SM_UPDATE_NONE
314 || (suc->update.type == SM_UPDATE_UNSPECIFIED
315 && sub->update_strategy.type == SM_UPDATE_NONE)) {
316 strbuf_addf(out, _("Skipping submodule '%s'"), displaypath);
317 strbuf_addch(out, '\n');
318 goto cleanup;
319 }
320
321 /*
322 * Looking up the url in .git/config.
323 * We must not fall back to .gitmodules as we only want
324 * to process configured submodules.
325 */
326 strbuf_reset(&sb);
327 strbuf_addf(&sb, "submodule.%s.url", sub->name);
328 git_config_get_string(sb.buf, &url);
329 if (!url) {
330 /*
331 * Only mention uninitialized submodules when their
332 * path have been specified
333 */
334 if (suc->warn_if_uninitialized) {
335 strbuf_addf(out,
336 _("Submodule path '%s' not initialized"),
337 displaypath);
338 strbuf_addch(out, '\n');
339 strbuf_addstr(out,
340 _("Maybe you want to use 'update --init'?"));
341 strbuf_addch(out, '\n');
342 }
343 goto cleanup;
344 }
345
346 strbuf_reset(&sb);
347 strbuf_addf(&sb, "%s/.git", ce->name);
348 needs_cloning = !file_exists(sb.buf);
349
350 strbuf_reset(&sb);
351 strbuf_addf(&sb, "%06o %s %d %d\t%s\n", ce->ce_mode,
352 sha1_to_hex(ce->sha1), ce_stage(ce),
353 needs_cloning, ce->name);
354 string_list_append(&suc->projectlines, sb.buf);
355
356 if (!needs_cloning)
357 goto cleanup;
358
359 child->git_cmd = 1;
360 child->no_stdin = 1;
361 child->stdout_to_stderr = 1;
362 child->err = -1;
363 argv_array_push(&child->args, "submodule--helper");
364 argv_array_push(&child->args, "clone");
365 if (suc->quiet)
366 argv_array_push(&child->args, "--quiet");
367 if (suc->prefix)
368 argv_array_pushl(&child->args, "--prefix", suc->prefix, NULL);
369 argv_array_pushl(&child->args, "--path", sub->path, NULL);
370 argv_array_pushl(&child->args, "--name", sub->name, NULL);
371 argv_array_pushl(&child->args, "--url", url, NULL);
372 if (suc->reference)
373 argv_array_push(&child->args, suc->reference);
374 if (suc->depth)
375 argv_array_push(&child->args, suc->depth);
376
377cleanup:
378 free(url);
379 strbuf_reset(&displaypath_sb);
380 strbuf_reset(&sb);
381
382 return needs_cloning;
383}
384
385static int update_clone_get_next_task(struct child_process *child,
386 struct strbuf *err,
387 void *suc_cb,
388 void **void_task_cb)
389{
390 struct submodule_update_clone *suc = suc_cb;
391
392 for (; suc->current < suc->list.nr; suc->current++) {
393 const struct cache_entry *ce = suc->list.entries[suc->current];
394 if (prepare_to_clone_next_submodule(ce, child, suc, err)) {
395 suc->current++;
396 return 1;
397 }
398 }
399 return 0;
400}
401
402static int update_clone_start_failure(struct strbuf *err,
403 void *suc_cb,
404 void *void_task_cb)
405{
406 struct submodule_update_clone *suc = suc_cb;
407 suc->quickstop = 1;
408 return 1;
409}
410
411static int update_clone_task_finished(int result,
412 struct strbuf *err,
413 void *suc_cb,
414 void *void_task_cb)
415{
416 struct submodule_update_clone *suc = suc_cb;
417
418 if (!result)
419 return 0;
420
421 suc->quickstop = 1;
422 return 1;
423}
424
425static int update_clone(int argc, const char **argv, const char *prefix)
426{
427 const char *update = NULL;
428 int max_jobs = -1;
429 struct string_list_item *item;
430 struct pathspec pathspec;
431 struct submodule_update_clone suc = SUBMODULE_UPDATE_CLONE_INIT;
432
433 struct option module_update_clone_options[] = {
434 OPT_STRING(0, "prefix", &prefix,
435 N_("path"),
436 N_("path into the working tree")),
437 OPT_STRING(0, "recursive-prefix", &suc.recursive_prefix,
438 N_("path"),
439 N_("path into the working tree, across nested "
440 "submodule boundaries")),
441 OPT_STRING(0, "update", &update,
442 N_("string"),
443 N_("rebase, merge, checkout or none")),
444 OPT_STRING(0, "reference", &suc.reference, N_("repo"),
445 N_("reference repository")),
446 OPT_STRING(0, "depth", &suc.depth, "<depth>",
447 N_("Create a shallow clone truncated to the "
448 "specified number of revisions")),
449 OPT_INTEGER('j', "jobs", &max_jobs,
450 N_("parallel jobs")),
451 OPT__QUIET(&suc.quiet, N_("don't print cloning progress")),
452 OPT_END()
453 };
454
455 const char *const git_submodule_helper_usage[] = {
456 N_("git submodule--helper update_clone [--prefix=<path>] [<path>...]"),
457 NULL
458 };
459 suc.prefix = prefix;
460
461 argc = parse_options(argc, argv, prefix, module_update_clone_options,
462 git_submodule_helper_usage, 0);
463
464 if (update)
465 if (parse_submodule_update_strategy(update, &suc.update) < 0)
466 die(_("bad value for update parameter"));
467
468 if (module_list_compute(argc, argv, prefix, &pathspec, &suc.list) < 0)
469 return 1;
470
471 if (pathspec.nr)
472 suc.warn_if_uninitialized = 1;
473
474 /* Overlay the parsed .gitmodules file with .git/config */
475 gitmodules_config();
476 git_config(submodule_config, NULL);
477
478 if (max_jobs < 0)
479 max_jobs = parallel_submodules();
480
481 run_processes_parallel(max_jobs,
482 update_clone_get_next_task,
483 update_clone_start_failure,
484 update_clone_task_finished,
485 &suc);
486
487 /*
488 * We saved the output and put it out all at once now.
489 * That means:
490 * - the listener does not have to interleave their (checkout)
491 * work with our fetching. The writes involved in a
492 * checkout involve more straightforward sequential I/O.
493 * - the listener can avoid doing any work if fetching failed.
494 */
495 if (suc.quickstop)
496 return 1;
497
498 for_each_string_list_item(item, &suc.projectlines)
499 utf8_fprintf(stdout, "%s", item->string);
500
501 return 0;
502}
503
504struct cmd_struct {
505 const char *cmd;
506 int (*fn)(int, const char **, const char *);
507};
508
509static struct cmd_struct commands[] = {
510 {"list", module_list},
511 {"name", module_name},
512 {"clone", module_clone},
513 {"update-clone", update_clone}
514};
515
516int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
517{
518 int i;
519 if (argc < 2)
520 die(_("submodule--helper subcommand must be "
521 "called with a subcommand"));
522
523 for (i = 0; i < ARRAY_SIZE(commands); i++)
524 if (!strcmp(argv[1], commands[i].cmd))
525 return commands[i].fn(argc - 1, argv + 1, prefix);
526
527 die(_("'%s' is not a valid submodule--helper "
528 "subcommand"), argv[1]);
529}