Bug Summary

File:remote.c
Location:line 928, column 15
Description:Null pointer argument in call to string length function

Annotated Source Code

1#include "cache.h"
2#include "remote.h"
3#include "refs.h"
4#include "commit.h"
5#include "diff.h"
6#include "revision.h"
7#include "dir.h"
8#include "tag.h"
9#include "string-list.h"
10#include "mergesort.h"
11#include "argv-array.h"
12
13enum map_direction { FROM_SRC, FROM_DST };
14
15static struct refspec s_tag_refspec = {
16 0,
17 1,
18 0,
19 0,
20 "refs/tags/*",
21 "refs/tags/*"
22};
23
24const struct refspec *tag_refspec = &s_tag_refspec;
25
26struct counted_string {
27 size_t len;
28 const char *s;
29};
30struct rewrite {
31 const char *base;
32 size_t baselen;
33 struct counted_string *instead_of;
34 int instead_of_nr;
35 int instead_of_alloc;
36};
37struct rewrites {
38 struct rewrite **rewrite;
39 int rewrite_alloc;
40 int rewrite_nr;
41};
42
43static struct remote **remotes;
44static int remotes_alloc;
45static int remotes_nr;
46static struct hashmap remotes_hash;
47
48static struct branch **branches;
49static int branches_alloc;
50static int branches_nr;
51
52static struct branch *current_branch;
53static const char *pushremote_name;
54
55static struct rewrites rewrites;
56static struct rewrites rewrites_push;
57
58static int valid_remote(const struct remote *remote)
59{
60 return (!!remote->url) || (!!remote->foreign_vcs);
61}
62
63static const char *alias_url(const char *url, struct rewrites *r)
64{
65 int i, j;
66 struct counted_string *longest;
67 int longest_i;
68
69 longest = NULL((void*)0);
70 longest_i = -1;
71 for (i = 0; i < r->rewrite_nr; i++) {
72 if (!r->rewrite[i])
73 continue;
74 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
75 if (starts_with(url, r->rewrite[i]->instead_of[j].s) &&
76 (!longest ||
77 longest->len < r->rewrite[i]->instead_of[j].len)) {
78 longest = &(r->rewrite[i]->instead_of[j]);
79 longest_i = i;
80 }
81 }
82 }
83 if (!longest)
84 return url;
85
86 return xstrfmt("%s%s", r->rewrite[longest_i]->base, url + longest->len);
87}
88
89static void add_push_refspec(struct remote *remote, const char *ref)
90{
91 ALLOC_GROW(remote->push_refspec,do { if ((remote->push_refspec_nr + 1) > remote->push_refspec_alloc
) { if ((((remote->push_refspec_alloc)+16)*3/2) < (remote
->push_refspec_nr + 1)) remote->push_refspec_alloc = (remote
->push_refspec_nr + 1); else remote->push_refspec_alloc
= (((remote->push_refspec_alloc)+16)*3/2); (remote->push_refspec
) = xrealloc((remote->push_refspec), st_mult(sizeof(*(remote
->push_refspec)), (remote->push_refspec_alloc))); } } while
(0)
92 remote->push_refspec_nr + 1,do { if ((remote->push_refspec_nr + 1) > remote->push_refspec_alloc
) { if ((((remote->push_refspec_alloc)+16)*3/2) < (remote
->push_refspec_nr + 1)) remote->push_refspec_alloc = (remote
->push_refspec_nr + 1); else remote->push_refspec_alloc
= (((remote->push_refspec_alloc)+16)*3/2); (remote->push_refspec
) = xrealloc((remote->push_refspec), st_mult(sizeof(*(remote
->push_refspec)), (remote->push_refspec_alloc))); } } while
(0)
93 remote->push_refspec_alloc)do { if ((remote->push_refspec_nr + 1) > remote->push_refspec_alloc
) { if ((((remote->push_refspec_alloc)+16)*3/2) < (remote
->push_refspec_nr + 1)) remote->push_refspec_alloc = (remote
->push_refspec_nr + 1); else remote->push_refspec_alloc
= (((remote->push_refspec_alloc)+16)*3/2); (remote->push_refspec
) = xrealloc((remote->push_refspec), st_mult(sizeof(*(remote
->push_refspec)), (remote->push_refspec_alloc))); } } while
(0);
94 remote->push_refspec[remote->push_refspec_nr++] = ref;
95}
96
97static void add_fetch_refspec(struct remote *remote, const char *ref)
98{
99 ALLOC_GROW(remote->fetch_refspec,do { if ((remote->fetch_refspec_nr + 1) > remote->fetch_refspec_alloc
) { if ((((remote->fetch_refspec_alloc)+16)*3/2) < (remote
->fetch_refspec_nr + 1)) remote->fetch_refspec_alloc = (
remote->fetch_refspec_nr + 1); else remote->fetch_refspec_alloc
= (((remote->fetch_refspec_alloc)+16)*3/2); (remote->fetch_refspec
) = xrealloc((remote->fetch_refspec), st_mult(sizeof(*(remote
->fetch_refspec)), (remote->fetch_refspec_alloc))); } }
while (0)
100 remote->fetch_refspec_nr + 1,do { if ((remote->fetch_refspec_nr + 1) > remote->fetch_refspec_alloc
) { if ((((remote->fetch_refspec_alloc)+16)*3/2) < (remote
->fetch_refspec_nr + 1)) remote->fetch_refspec_alloc = (
remote->fetch_refspec_nr + 1); else remote->fetch_refspec_alloc
= (((remote->fetch_refspec_alloc)+16)*3/2); (remote->fetch_refspec
) = xrealloc((remote->fetch_refspec), st_mult(sizeof(*(remote
->fetch_refspec)), (remote->fetch_refspec_alloc))); } }
while (0)
101 remote->fetch_refspec_alloc)do { if ((remote->fetch_refspec_nr + 1) > remote->fetch_refspec_alloc
) { if ((((remote->fetch_refspec_alloc)+16)*3/2) < (remote
->fetch_refspec_nr + 1)) remote->fetch_refspec_alloc = (
remote->fetch_refspec_nr + 1); else remote->fetch_refspec_alloc
= (((remote->fetch_refspec_alloc)+16)*3/2); (remote->fetch_refspec
) = xrealloc((remote->fetch_refspec), st_mult(sizeof(*(remote
->fetch_refspec)), (remote->fetch_refspec_alloc))); } }
while (0);
102 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
103}
104
105static void add_url(struct remote *remote, const char *url)
106{
107 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc)do { if ((remote->url_nr + 1) > remote->url_alloc) {
if ((((remote->url_alloc)+16)*3/2) < (remote->url_nr
+ 1)) remote->url_alloc = (remote->url_nr + 1); else remote
->url_alloc = (((remote->url_alloc)+16)*3/2); (remote->
url) = xrealloc((remote->url), st_mult(sizeof(*(remote->
url)), (remote->url_alloc))); } } while (0);
108 remote->url[remote->url_nr++] = url;
109}
110
111static void add_pushurl(struct remote *remote, const char *pushurl)
112{
113 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc)do { if ((remote->pushurl_nr + 1) > remote->pushurl_alloc
) { if ((((remote->pushurl_alloc)+16)*3/2) < (remote->
pushurl_nr + 1)) remote->pushurl_alloc = (remote->pushurl_nr
+ 1); else remote->pushurl_alloc = (((remote->pushurl_alloc
)+16)*3/2); (remote->pushurl) = xrealloc((remote->pushurl
), st_mult(sizeof(*(remote->pushurl)), (remote->pushurl_alloc
))); } } while (0);
114 remote->pushurl[remote->pushurl_nr++] = pushurl;
115}
116
117static void add_pushurl_alias(struct remote *remote, const char *url)
118{
119 const char *pushurl = alias_url(url, &rewrites_push);
120 if (pushurl != url)
121 add_pushurl(remote, pushurl);
122}
123
124static void add_url_alias(struct remote *remote, const char *url)
125{
126 add_url(remote, alias_url(url, &rewrites));
127 add_pushurl_alias(remote, url);
128}
129
130struct remotes_hash_key {
131 const char *str;
132 int len;
133};
134
135static int remotes_hash_cmp(const struct remote *a, const struct remote *b, const struct remotes_hash_key *key)
136{
137 if (key)
138 return strncmp(a->name, key->str, key->len) || a->name[key->len];
139 else
140 return strcmp(a->name, b->name);
141}
142
143static inline void init_remotes_hash(void)
144{
145 if (!remotes_hash.cmpfn)
146 hashmap_init(&remotes_hash, (hashmap_cmp_fn)remotes_hash_cmp, 0);
147}
148
149static struct remote *make_remote(const char *name, int len)
150{
151 struct remote *ret, *replaced;
152 struct remotes_hash_key lookup;
153 struct hashmap_entry lookup_entry;
154
155 if (!len)
156 len = strlen(name);
157
158 init_remotes_hash();
159 lookup.str = name;
160 lookup.len = len;
161 hashmap_entry_init(&lookup_entry, memhash(name, len));
162
163 if ((ret = hashmap_get(&remotes_hash, &lookup_entry, &lookup)) != NULL((void*)0))
164 return ret;
165
166 ret = xcalloc(1, sizeof(struct remote));
167 ret->prune = -1; /* unspecified */
168 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc)do { if ((remotes_nr + 1) > remotes_alloc) { if ((((remotes_alloc
)+16)*3/2) < (remotes_nr + 1)) remotes_alloc = (remotes_nr
+ 1); else remotes_alloc = (((remotes_alloc)+16)*3/2); (remotes
) = xrealloc((remotes), st_mult(sizeof(*(remotes)), (remotes_alloc
))); } } while (0);
169 remotes[remotes_nr++] = ret;
170 ret->name = xstrndup(name, len);
171
172 hashmap_entry_init(ret, lookup_entry.hash);
173 replaced = hashmap_put(&remotes_hash, ret);
174 assert(replaced == NULL)(__builtin_expect(!(replaced == ((void*)0)), 0) ? __assert_rtn
(__func__, "remote.c", 174, "replaced == NULL") : (void)0); /* no previous entry overwritten */
175 return ret;
176}
177
178static void add_merge(struct branch *branch, const char *name)
179{
180 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,do { if ((branch->merge_nr + 1) > branch->merge_alloc
) { if ((((branch->merge_alloc)+16)*3/2) < (branch->
merge_nr + 1)) branch->merge_alloc = (branch->merge_nr +
1); else branch->merge_alloc = (((branch->merge_alloc)
+16)*3/2); (branch->merge_name) = xrealloc((branch->merge_name
), st_mult(sizeof(*(branch->merge_name)), (branch->merge_alloc
))); } } while (0)
181 branch->merge_alloc)do { if ((branch->merge_nr + 1) > branch->merge_alloc
) { if ((((branch->merge_alloc)+16)*3/2) < (branch->
merge_nr + 1)) branch->merge_alloc = (branch->merge_nr +
1); else branch->merge_alloc = (((branch->merge_alloc)
+16)*3/2); (branch->merge_name) = xrealloc((branch->merge_name
), st_mult(sizeof(*(branch->merge_name)), (branch->merge_alloc
))); } } while (0);
182 branch->merge_name[branch->merge_nr++] = name;
183}
184
185static struct branch *make_branch(const char *name, int len)
186{
187 struct branch *ret;
188 int i;
189
190 for (i = 0; i < branches_nr; i++) {
191 if (len ? (!strncmp(name, branches[i]->name, len) &&
192 !branches[i]->name[len]) :
193 !strcmp(name, branches[i]->name))
194 return branches[i];
195 }
196
197 ALLOC_GROW(branches, branches_nr + 1, branches_alloc)do { if ((branches_nr + 1) > branches_alloc) { if ((((branches_alloc
)+16)*3/2) < (branches_nr + 1)) branches_alloc = (branches_nr
+ 1); else branches_alloc = (((branches_alloc)+16)*3/2); (branches
) = xrealloc((branches), st_mult(sizeof(*(branches)), (branches_alloc
))); } } while (0);
198 ret = xcalloc(1, sizeof(struct branch));
199 branches[branches_nr++] = ret;
200 if (len)
201 ret->name = xstrndup(name, len);
202 else
203 ret->name = xstrdup(name);
204 ret->refname = xstrfmt("refs/heads/%s", ret->name);
205
206 return ret;
207}
208
209static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
210{
211 struct rewrite *ret;
212 int i;
213
214 for (i = 0; i < r->rewrite_nr; i++) {
215 if (len
216 ? (len == r->rewrite[i]->baselen &&
217 !strncmp(base, r->rewrite[i]->base, len))
218 : !strcmp(base, r->rewrite[i]->base))
219 return r->rewrite[i];
220 }
221
222 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc)do { if ((r->rewrite_nr + 1) > r->rewrite_alloc) { if
((((r->rewrite_alloc)+16)*3/2) < (r->rewrite_nr + 1
)) r->rewrite_alloc = (r->rewrite_nr + 1); else r->rewrite_alloc
= (((r->rewrite_alloc)+16)*3/2); (r->rewrite) = xrealloc
((r->rewrite), st_mult(sizeof(*(r->rewrite)), (r->rewrite_alloc
))); } } while (0);
223 ret = xcalloc(1, sizeof(struct rewrite));
224 r->rewrite[r->rewrite_nr++] = ret;
225 if (len) {
226 ret->base = xstrndup(base, len);
227 ret->baselen = len;
228 }
229 else {
230 ret->base = xstrdup(base);
231 ret->baselen = strlen(base);
232 }
233 return ret;
234}
235
236static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
237{
238 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc)do { if ((rewrite->instead_of_nr + 1) > rewrite->instead_of_alloc
) { if ((((rewrite->instead_of_alloc)+16)*3/2) < (rewrite
->instead_of_nr + 1)) rewrite->instead_of_alloc = (rewrite
->instead_of_nr + 1); else rewrite->instead_of_alloc = (
((rewrite->instead_of_alloc)+16)*3/2); (rewrite->instead_of
) = xrealloc((rewrite->instead_of), st_mult(sizeof(*(rewrite
->instead_of)), (rewrite->instead_of_alloc))); } } while
(0);
239 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
240 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
241 rewrite->instead_of_nr++;
242}
243
244static const char *skip_spaces(const char *s)
245{
246 while (isspace(*s)((sane_ctype[(unsigned char)(*s)] & (0x01)) != 0))
247 s++;
248 return s;
249}
250
251static void read_remotes_file(struct remote *remote)
252{
253 struct strbuf buf = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
254 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
255
256 if (!f)
257 return;
258 remote->configured_in_repo = 1;
259 remote->origin = REMOTE_REMOTES;
260 while (strbuf_getline(&buf, f) != EOF(-1)) {
261 const char *v;
262
263 strbuf_rtrim(&buf);
264
265 if (skip_prefix(buf.buf, "URL:", &v))
266 add_url_alias(remote, xstrdup(skip_spaces(v)));
267 else if (skip_prefix(buf.buf, "Push:", &v))
268 add_push_refspec(remote, xstrdup(skip_spaces(v)));
269 else if (skip_prefix(buf.buf, "Pull:", &v))
270 add_fetch_refspec(remote, xstrdup(skip_spaces(v)));
271 }
272 strbuf_release(&buf);
273 fclose(f);
274}
275
276static void read_branches_file(struct remote *remote)
277{
278 char *frag;
279 struct strbuf buf = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
280 FILE *f = fopen(git_path("branches/%s", remote->name), "r");
281
282 if (!f)
283 return;
284
285 strbuf_getline_lf(&buf, f);
286 fclose(f);
287 strbuf_trim(&buf);
288 if (!buf.len) {
289 strbuf_release(&buf);
290 return;
291 }
292
293 remote->configured_in_repo = 1;
294 remote->origin = REMOTE_BRANCHES;
295
296 /*
297 * The branches file would have URL and optionally
298 * #branch specified. The "master" (or specified) branch is
299 * fetched and stored in the local branch matching the
300 * remote name.
301 */
302 frag = strchr(buf.buf, '#');
303 if (frag)
304 *(frag++) = '\0';
305 else
306 frag = "master";
307
308 add_url_alias(remote, strbuf_detach(&buf, NULL((void*)0)));
309 add_fetch_refspec(remote, xstrfmt("refs/heads/%s:refs/heads/%s",
310 frag, remote->name));
311
312 /*
313 * Cogito compatible push: push current HEAD to remote #branch
314 * (master if missing)
315 */
316 add_push_refspec(remote, xstrfmt("HEAD:refs/heads/%s", frag));
317 remote->fetch_tags = 1; /* always auto-follow */
318}
319
320static int handle_config(const char *key, const char *value, void *cb)
321{
322 const char *name;
323 int namelen;
324 const char *subkey;
325 struct remote *remote;
326 struct branch *branch;
327 if (parse_config_key(key, "branch", &name, &namelen, &subkey) >= 0) {
328 if (!name)
329 return 0;
330 branch = make_branch(name, namelen);
331 if (!strcmp(subkey, "remote")) {
332 return git_config_string(&branch->remote_name, key, value);
333 } else if (!strcmp(subkey, "pushremote")) {
334 return git_config_string(&branch->pushremote_name, key, value);
335 } else if (!strcmp(subkey, "merge")) {
336 if (!value)
337 return config_error_nonbool(key)(config_error_nonbool(key), const_error());
338 add_merge(branch, xstrdup(value));
339 }
340 return 0;
341 }
342 if (parse_config_key(key, "url", &name, &namelen, &subkey) >= 0) {
343 struct rewrite *rewrite;
344 if (!name)
345 return 0;
346 if (!strcmp(subkey, "insteadof")) {
347 rewrite = make_rewrite(&rewrites, name, namelen);
348 if (!value)
349 return config_error_nonbool(key)(config_error_nonbool(key), const_error());
350 add_instead_of(rewrite, xstrdup(value));
351 } else if (!strcmp(subkey, "pushinsteadof")) {
352 rewrite = make_rewrite(&rewrites_push, name, namelen);
353 if (!value)
354 return config_error_nonbool(key)(config_error_nonbool(key), const_error());
355 add_instead_of(rewrite, xstrdup(value));
356 }
357 }
358
359 if (parse_config_key(key, "remote", &name, &namelen, &subkey) < 0)
360 return 0;
361
362 /* Handle remote.* variables */
363 if (!name && !strcmp(subkey, "pushdefault"))
364 return git_config_string(&pushremote_name, key, value);
365
366 if (!name)
367 return 0;
368 /* Handle remote.<name>.* variables */
369 if (*name == '/') {
370 warning("Config remote shorthand cannot begin with '/': %s",
371 name);
372 return 0;
373 }
374 remote = make_remote(name, namelen);
375 remote->origin = REMOTE_CONFIG;
376 if (current_config_scope() == CONFIG_SCOPE_REPO)
377 remote->configured_in_repo = 1;
378 if (!strcmp(subkey, "mirror"))
379 remote->mirror = git_config_bool(key, value);
380 else if (!strcmp(subkey, "skipdefaultupdate"))
381 remote->skip_default_update = git_config_bool(key, value);
382 else if (!strcmp(subkey, "skipfetchall"))
383 remote->skip_default_update = git_config_bool(key, value);
384 else if (!strcmp(subkey, "prune"))
385 remote->prune = git_config_bool(key, value);
386 else if (!strcmp(subkey, "url")) {
387 const char *v;
388 if (git_config_string(&v, key, value))
389 return -1;
390 add_url(remote, v);
391 } else if (!strcmp(subkey, "pushurl")) {
392 const char *v;
393 if (git_config_string(&v, key, value))
394 return -1;
395 add_pushurl(remote, v);
396 } else if (!strcmp(subkey, "push")) {
397 const char *v;
398 if (git_config_string(&v, key, value))
399 return -1;
400 add_push_refspec(remote, v);
401 } else if (!strcmp(subkey, "fetch")) {
402 const char *v;
403 if (git_config_string(&v, key, value))
404 return -1;
405 add_fetch_refspec(remote, v);
406 } else if (!strcmp(subkey, "receivepack")) {
407 const char *v;
408 if (git_config_string(&v, key, value))
409 return -1;
410 if (!remote->receivepack)
411 remote->receivepack = v;
412 else
413 error("more than one receivepack given, using the first")(error("more than one receivepack given, using the first"), const_error
());
414 } else if (!strcmp(subkey, "uploadpack")) {
415 const char *v;
416 if (git_config_string(&v, key, value))
417 return -1;
418 if (!remote->uploadpack)
419 remote->uploadpack = v;
420 else
421 error("more than one uploadpack given, using the first")(error("more than one uploadpack given, using the first"), const_error
());
422 } else if (!strcmp(subkey, "tagopt")) {
423 if (!strcmp(value, "--no-tags"))
424 remote->fetch_tags = -1;
425 else if (!strcmp(value, "--tags"))
426 remote->fetch_tags = 2;
427 } else if (!strcmp(subkey, "proxy")) {
428 return git_config_string((const char **)&remote->http_proxy,
429 key, value);
430 } else if (!strcmp(subkey, "proxyauthmethod")) {
431 return git_config_string((const char **)&remote->http_proxy_authmethod,
432 key, value);
433 } else if (!strcmp(subkey, "vcs")) {
434 return git_config_string(&remote->foreign_vcs, key, value);
435 }
436 return 0;
437}
438
439static void alias_all_urls(void)
440{
441 int i, j;
442 for (i = 0; i < remotes_nr; i++) {
443 int add_pushurl_aliases;
444 if (!remotes[i])
445 continue;
446 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
447 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
448 }
449 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
450 for (j = 0; j < remotes[i]->url_nr; j++) {
451 if (add_pushurl_aliases)
452 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
453 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
454 }
455 }
456}
457
458static void read_config(void)
459{
460 static int loaded;
461 struct object_id oid;
462 int flag;
463
464 if (loaded)
465 return;
466 loaded = 1;
467
468 current_branch = NULL((void*)0);
469 if (startup_info->have_repository) {
470 const char *head_ref = resolve_ref_unsafe("HEAD", 0, oid.hash, &flag);
471 if (head_ref && (flag & REF_ISSYMREF0x01) &&
472 skip_prefix(head_ref, "refs/heads/", &head_ref)) {
473 current_branch = make_branch(head_ref, 0);
474 }
475 }
476 git_config(handle_config, NULL((void*)0));
477 alias_all_urls();
478}
479
480/*
481 * This function frees a refspec array.
482 * Warning: code paths should be checked to ensure that the src
483 * and dst pointers are always freeable pointers as well
484 * as the refspec pointer itself.
485 */
486static void free_refspecs(struct refspec *refspec, int nr_refspec)
487{
488 int i;
489
490 if (!refspec)
491 return;
492
493 for (i = 0; i < nr_refspec; i++) {
494 free(refspec[i].src);
495 free(refspec[i].dst);
496 }
497 free(refspec);
498}
499
500static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
501{
502 int i;
503 struct refspec *rs = xcalloc(nr_refspec, sizeof(*rs));
504
505 for (i = 0; i < nr_refspec; i++) {
506 size_t llen;
507 int is_glob;
508 const char *lhs, *rhs;
509 int flags;
510
511 is_glob = 0;
512
513 lhs = refspec[i];
514 if (*lhs == '+') {
515 rs[i].force = 1;
516 lhs++;
517 }
518
519 rhs = strrchr(lhs, ':');
520
521 /*
522 * Before going on, special case ":" (or "+:") as a refspec
523 * for pushing matching refs.
524 */
525 if (!fetch && rhs == lhs && rhs[1] == '\0') {
526 rs[i].matching = 1;
527 continue;
528 }
529
530 if (rhs) {
531 size_t rlen = strlen(++rhs);
532 is_glob = (1 <= rlen && strchr(rhs, '*'));
533 rs[i].dst = xstrndup(rhs, rlen);
534 }
535
536 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
537 if (1 <= llen && memchr(lhs, '*', llen)) {
538 if ((rhs && !is_glob) || (!rhs && fetch))
539 goto invalid;
540 is_glob = 1;
541 } else if (rhs && is_glob) {
542 goto invalid;
543 }
544
545 rs[i].pattern = is_glob;
546 rs[i].src = xstrndup(lhs, llen);
547 flags = REFNAME_ALLOW_ONELEVEL1 | (is_glob ? REFNAME_REFSPEC_PATTERN2 : 0);
548
549 if (fetch) {
550 struct object_id unused;
551
552 /* LHS */
553 if (!*rs[i].src)
554 ; /* empty is ok; it means "HEAD" */
555 else if (llen == GIT_SHA1_HEXSZ(2 * 20) && !get_oid_hex(rs[i].src, &unused))
556 rs[i].exact_sha1 = 1; /* ok */
557 else if (!check_refname_format(rs[i].src, flags))
558 ; /* valid looking ref is ok */
559 else
560 goto invalid;
561 /* RHS */
562 if (!rs[i].dst)
563 ; /* missing is ok; it is the same as empty */
564 else if (!*rs[i].dst)
565 ; /* empty is ok; it means "do not store" */
566 else if (!check_refname_format(rs[i].dst, flags))
567 ; /* valid looking ref is ok */
568 else
569 goto invalid;
570 } else {
571 /*
572 * LHS
573 * - empty is allowed; it means delete.
574 * - when wildcarded, it must be a valid looking ref.
575 * - otherwise, it must be an extended SHA-1, but
576 * there is no existing way to validate this.
577 */
578 if (!*rs[i].src)
579 ; /* empty is ok */
580 else if (is_glob) {
581 if (check_refname_format(rs[i].src, flags))
582 goto invalid;
583 }
584 else
585 ; /* anything goes, for now */
586 /*
587 * RHS
588 * - missing is allowed, but LHS then must be a
589 * valid looking ref.
590 * - empty is not allowed.
591 * - otherwise it must be a valid looking ref.
592 */
593 if (!rs[i].dst) {
594 if (check_refname_format(rs[i].src, flags))
595 goto invalid;
596 } else if (!*rs[i].dst) {
597 goto invalid;
598 } else {
599 if (check_refname_format(rs[i].dst, flags))
600 goto invalid;
601 }
602 }
603 }
604 return rs;
605
606 invalid:
607 if (verify) {
608 /*
609 * nr_refspec must be greater than zero and i must be valid
610 * since it is only possible to reach this point from within
611 * the for loop above.
612 */
613 free_refspecs(rs, i+1);
614 return NULL((void*)0);
615 }
616 die("Invalid refspec '%s'", refspec[i]);
617}
618
619int valid_fetch_refspec(const char *fetch_refspec_str)
620{
621 struct refspec *refspec;
622
623 refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
624 free_refspecs(refspec, 1);
625 return !!refspec;
626}
627
628struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
629{
630 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
631}
632
633static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
634{
635 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
636}
637
638void free_refspec(int nr_refspec, struct refspec *refspec)
639{
640 int i;
641 for (i = 0; i < nr_refspec; i++) {
642 free(refspec[i].src);
643 free(refspec[i].dst);
644 }
645 free(refspec);
646}
647
648static int valid_remote_nick(const char *name)
649{
650 if (!name[0] || is_dot_or_dotdot(name))
651 return 0;
652 return !strchr(name, '/'); /* no slash */
653}
654
655const char *remote_for_branch(struct branch *branch, int *explicit)
656{
657 if (branch && branch->remote_name) {
658 if (explicit)
659 *explicit = 1;
660 return branch->remote_name;
661 }
662 if (explicit)
663 *explicit = 0;
664 return "origin";
665}
666
667const char *pushremote_for_branch(struct branch *branch, int *explicit)
668{
669 if (branch && branch->pushremote_name) {
670 if (explicit)
671 *explicit = 1;
672 return branch->pushremote_name;
673 }
674 if (pushremote_name) {
675 if (explicit)
676 *explicit = 1;
677 return pushremote_name;
678 }
679 return remote_for_branch(branch, explicit);
680}
681
682static struct remote *remote_get_1(const char *name,
683 const char *(*get_default)(struct branch *, int *))
684{
685 struct remote *ret;
686 int name_given = 0;
687
688 read_config();
689
690 if (name)
691 name_given = 1;
692 else
693 name = get_default(current_branch, &name_given);
694
695 ret = make_remote(name, 0);
696 if (valid_remote_nick(name)) {
697 if (!valid_remote(ret))
698 read_remotes_file(ret);
699 if (!valid_remote(ret))
700 read_branches_file(ret);
701 }
702 if (name_given && !valid_remote(ret))
703 add_url_alias(ret, name);
704 if (!valid_remote(ret))
705 return NULL((void*)0);
706 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
707 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
708 return ret;
709}
710
711struct remote *remote_get(const char *name)
712{
713 return remote_get_1(name, remote_for_branch);
714}
715
716struct remote *pushremote_get(const char *name)
717{
718 return remote_get_1(name, pushremote_for_branch);
719}
720
721int remote_is_configured(struct remote *remote, int in_repo)
722{
723 if (!remote)
724 return 0;
725 if (in_repo)
726 return remote->configured_in_repo;
727 return !!remote->origin;
728}
729
730int for_each_remote(each_remote_fn fn, void *priv)
731{
732 int i, result = 0;
733 read_config();
734 for (i = 0; i < remotes_nr && !result; i++) {
735 struct remote *r = remotes[i];
736 if (!r)
737 continue;
738 if (!r->fetch)
739 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
740 r->fetch_refspec);
741 if (!r->push)
742 r->push = parse_push_refspec(r->push_refspec_nr,
743 r->push_refspec);
744 result = fn(r, priv);
745 }
746 return result;
747}
748
749static void handle_duplicate(struct ref *ref1, struct ref *ref2)
750{
751 if (strcmp(ref1->name, ref2->name)) {
752 if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
753 ref2->fetch_head_status != FETCH_HEAD_IGNORE) {
754 die(_("Cannot fetch both %s and %s to %s"),
755 ref1->name, ref2->name, ref2->peer_ref->name);
756 } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
757 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
758 warning(_("%s usually tracks %s, not %s"),
759 ref2->peer_ref->name, ref2->name, ref1->name);
760 } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE &&
761 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
762 die(_("%s tracks both %s and %s"),
763 ref2->peer_ref->name, ref1->name, ref2->name);
764 } else {
765 /*
766 * This last possibility doesn't occur because
767 * FETCH_HEAD_IGNORE entries always appear at
768 * the end of the list.
769 */
770 die(_("Internal error"));
771 }
772 }
773 free(ref2->peer_ref);
774 free(ref2);
775}
776
777struct ref *ref_remove_duplicates(struct ref *ref_map)
778{
779 struct string_list refs = STRING_LIST_INIT_NODUP{ ((void*)0), 0, 0, 0, ((void*)0) };
780 struct ref *retval = NULL((void*)0);
781 struct ref **p = &retval;
782
783 while (ref_map) {
784 struct ref *ref = ref_map;
785
786 ref_map = ref_map->next;
787 ref->next = NULL((void*)0);
788
789 if (!ref->peer_ref) {
790 *p = ref;
791 p = &ref->next;
792 } else {
793 struct string_list_item *item =
794 string_list_insert(&refs, ref->peer_ref->name);
795
796 if (item->util) {
797 /* Entry already existed */
798 handle_duplicate((struct ref *)item->util, ref);
799 } else {
800 *p = ref;
801 p = &ref->next;
802 item->util = ref;
803 }
804 }
805 }
806
807 string_list_clear(&refs, 0);
808 return retval;
809}
810
811int remote_has_url(struct remote *remote, const char *url)
812{
813 int i;
814 for (i = 0; i < remote->url_nr; i++) {
815 if (!strcmp(remote->url[i], url))
816 return 1;
817 }
818 return 0;
819}
820
821static int match_name_with_pattern(const char *key, const char *name,
822 const char *value, char **result)
823{
824 const char *kstar = strchr(key, '*');
825 size_t klen;
826 size_t ksuffixlen;
827 size_t namelen;
828 int ret;
829 if (!kstar)
6
←
Assuming 'kstar' is non-null
→
7
←
Taking false branch
→
12
←
Assuming 'kstar' is non-null
→
13
←
Taking false branch
→
19
←
Assuming 'kstar' is non-null
→
20
←
Taking false branch
→
830 die("Key '%s' of pattern had no '*'", key);
831 klen = kstar - key;
832 ksuffixlen = strlen(kstar + 1);
833 namelen = strlen(name);
834 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
835 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
836 if (ret && value) {
21
←
Taking false branch
→
837 struct strbuf sb = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
838 const char *vstar = strchr(value, '*');
839 if (!vstar)
840 die("Value '%s' of pattern has no '*'", value);
841 strbuf_add(&sb, value, vstar - value);
842 strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen);
843 strbuf_addstr(&sb, vstar + 1);
844 *result = strbuf_detach(&sb, NULL((void*)0));
845 }
846 return ret;
847}
848
849static void query_refspecs_multiple(struct refspec *refs, int ref_count, struct refspec *query, struct string_list *results)
850{
851 int i;
852 int find_src = !query->src;
853
854 if (find_src && !query->dst)
855 error("query_refspecs_multiple: need either src or dst")(error("query_refspecs_multiple: need either src or dst"), const_error
());
856
857 for (i = 0; i < ref_count; i++) {
858 struct refspec *refspec = &refs[i];
859 const char *key = find_src ? refspec->dst : refspec->src;
860 const char *value = find_src ? refspec->src : refspec->dst;
861 const char *needle = find_src ? query->dst : query->src;
862 char **result = find_src ? &query->src : &query->dst;
863
864 if (!refspec->dst)
865 continue;
866 if (refspec->pattern) {
867 if (match_name_with_pattern(key, needle, value, result))
868 string_list_append_nodup(results, *result);
869 } else if (!strcmp(needle, key)) {
870 string_list_append(results, value);
871 }
872 }
873}
874
875int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
876{
877 int i;
878 int find_src = !query->src;
879 const char *needle = find_src ? query->dst : query->src;
880 char **result = find_src ? &query->src : &query->dst;
881
882 if (find_src && !query->dst)
883 return error("query_refspecs: need either src or dst")(error("query_refspecs: need either src or dst"), const_error
());
884
885 for (i = 0; i < ref_count; i++) {
886 struct refspec *refspec = &refs[i];
887 const char *key = find_src ? refspec->dst : refspec->src;
888 const char *value = find_src ? refspec->src : refspec->dst;
889
890 if (!refspec->dst)
891 continue;
892 if (refspec->pattern) {
893 if (match_name_with_pattern(key, needle, value, result)) {
894 query->force = refspec->force;
895 return 0;
896 }
897 } else if (!strcmp(needle, key)) {
898 *result = xstrdup(value);
899 query->force = refspec->force;
900 return 0;
901 }
902 }
903 return -1;
904}
905
906char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
907 const char *name)
908{
909 struct refspec query;
910
911 memset(&query, 0, sizeof(struct refspec))__builtin___memset_chk (&query, 0, sizeof(struct refspec)
, __builtin_object_size (&query, 0));
912 query.src = (char *)name;
913
914 if (query_refspecs(refspecs, nr_refspec, &query))
915 return NULL((void*)0);
916
917 return query.dst;
918}
919
920int remote_find_tracking(struct remote *remote, struct refspec *refspec)
921{
922 return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
923}
924
925static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
926 const char *name)
927{
928 size_t len = strlen(name);
28
←
Null pointer argument in call to string length function
929 struct ref *ref = xcalloc(1, st_add4(sizeof(*ref), prefixlen, len, 1)st_add(st_add(st_add(((sizeof(*ref))),((prefixlen))),((len)))
,(1)));
930 memcpy(ref->name, prefix, prefixlen)__builtin___memcpy_chk (ref->name, prefix, prefixlen, __builtin_object_size
(ref->name, 0));
931 memcpy(ref->name + prefixlen, name, len)__builtin___memcpy_chk (ref->name + prefixlen, name, len, __builtin_object_size
(ref->name + prefixlen, 0));
932 return ref;
933}
934
935struct ref *alloc_ref(const char *name)
936{
937 return alloc_ref_with_prefix("", 0, name);
26
←
Passing null pointer value via 3rd parameter 'name'
→
27
←
Calling 'alloc_ref_with_prefix'
→
938}
939
940struct ref *copy_ref(const struct ref *ref)
941{
942 struct ref *cpy;
943 size_t len;
944 if (!ref)
945 return NULL((void*)0);
946 len = st_add3(sizeof(struct ref), strlen(ref->name), 1)st_add(st_add((sizeof(struct ref)),(strlen(ref->name))),(1
));
947 cpy = xmalloc(len);
948 memcpy(cpy, ref, len)__builtin___memcpy_chk (cpy, ref, len, __builtin_object_size (
cpy, 0));
949 cpy->next = NULL((void*)0);
950 cpy->symref = xstrdup_or_null(ref->symref);
951 cpy->remote_status = xstrdup_or_null(ref->remote_status);
952 cpy->peer_ref = copy_ref(ref->peer_ref);
953 return cpy;
954}
955
956struct ref *copy_ref_list(const struct ref *ref)
957{
958 struct ref *ret = NULL((void*)0);
959 struct ref **tail = &ret;
960 while (ref) {
961 *tail = copy_ref(ref);
962 ref = ref->next;
963 tail = &((*tail)->next);
964 }
965 return ret;
966}
967
968static void free_ref(struct ref *ref)
969{
970 if (!ref)
971 return;
972 free_ref(ref->peer_ref);
973 free(ref->remote_status);
974 free(ref->symref);
975 free(ref);
976}
977
978void free_refs(struct ref *ref)
979{
980 struct ref *next;
981 while (ref) {
982 next = ref->next;
983 free_ref(ref);
984 ref = next;
985 }
986}
987
988int ref_compare_name(const void *va, const void *vb)
989{
990 const struct ref *a = va, *b = vb;
991 return strcmp(a->name, b->name);
992}
993
994static void *ref_list_get_next(const void *a)
995{
996 return ((const struct ref *)a)->next;
997}
998
999static void ref_list_set_next(void *a, void *next)
1000{
1001 ((struct ref *)a)->next = next;
1002}
1003
1004void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
1005{
1006 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
1007}
1008
1009int count_refspec_match(const char *pattern,
1010 struct ref *refs,
1011 struct ref **matched_ref)
1012{
1013 int patlen = strlen(pattern);
1014 struct ref *matched_weak = NULL((void*)0);
1015 struct ref *matched = NULL((void*)0);
1016 int weak_match = 0;
1017 int match = 0;
1018
1019 for (weak_match = match = 0; refs; refs = refs->next) {
1020 char *name = refs->name;
1021 int namelen = strlen(name);
1022
1023 if (!refname_match(pattern, name))
1024 continue;
1025
1026 /* A match is "weak" if it is with refs outside
1027 * heads or tags, and did not specify the pattern
1028 * in full (e.g. "refs/remotes/origin/master") or at
1029 * least from the toplevel (e.g. "remotes/origin/master");
1030 * otherwise "git push $URL master" would result in
1031 * ambiguity between remotes/origin/master and heads/master
1032 * at the remote site.
1033 */
1034 if (namelen != patlen &&
1035 patlen != namelen - 5 &&
1036 !starts_with(name, "refs/heads/") &&
1037 !starts_with(name, "refs/tags/")) {
1038 /* We want to catch the case where only weak
1039 * matches are found and there are multiple
1040 * matches, and where more than one strong
1041 * matches are found, as ambiguous. One
1042 * strong match with zero or more weak matches
1043 * are acceptable as a unique match.
1044 */
1045 matched_weak = refs;
1046 weak_match++;
1047 }
1048 else {
1049 matched = refs;
1050 match++;
1051 }
1052 }
1053 if (!matched) {
1054 if (matched_ref)
1055 *matched_ref = matched_weak;
1056 return weak_match;
1057 }
1058 else {
1059 if (matched_ref)
1060 *matched_ref = matched;
1061 return match;
1062 }
1063}
1064
1065static void tail_link_ref(struct ref *ref, struct ref ***tail)
1066{
1067 **tail = ref;
1068 while (ref->next)
1069 ref = ref->next;
1070 *tail = &ref->next;
1071}
1072
1073static struct ref *alloc_delete_ref(void)
1074{
1075 struct ref *ref = alloc_ref("(delete)");
1076 oidclr(&ref->new_oid);
1077 return ref;
1078}
1079
1080static int try_explicit_object_name(const char *name,
1081 struct ref **match)
1082{
1083 struct object_id oid;
1084
1085 if (!*name) {
1086 if (match)
1087 *match = alloc_delete_ref();
1088 return 0;
1089 }
1090
1091 if (get_sha1(name, oid.hash))
1092 return -1;
1093
1094 if (match) {
1095 *match = alloc_ref(name);
1096 oidcpy(&(*match)->new_oid, &oid);
1097 }
1098 return 0;
1099}
1100
1101static struct ref *make_linked_ref(const char *name, struct ref ***tail)
1102{
1103 struct ref *ret = alloc_ref(name);
1104 tail_link_ref(ret, tail);
1105 return ret;
1106}
1107
1108static char *guess_ref(const char *name, struct ref *peer)
1109{
1110 struct strbuf buf = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
1111 struct object_id oid;
1112
1113 const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING0x01,
1114 oid.hash, NULL((void*)0));
1115 if (!r)
1116 return NULL((void*)0);
1117
1118 if (starts_with(r, "refs/heads/"))
1119 strbuf_addstr(&buf, "refs/heads/");
1120 else if (starts_with(r, "refs/tags/"))
1121 strbuf_addstr(&buf, "refs/tags/");
1122 else
1123 return NULL((void*)0);
1124
1125 strbuf_addstr(&buf, name);
1126 return strbuf_detach(&buf, NULL((void*)0));
1127}
1128
1129static int match_explicit_lhs(struct ref *src,
1130 struct refspec *rs,
1131 struct ref **match,
1132 int *allocated_match)
1133{
1134 switch (count_refspec_match(rs->src, src, match)) {
1135 case 1:
1136 if (allocated_match)
1137 *allocated_match = 0;
1138 return 0;
1139 case 0:
1140 /* The source could be in the get_sha1() format
1141 * not a reference name. :refs/other is a
1142 * way to delete 'other' ref at the remote end.
1143 */
1144 if (try_explicit_object_name(rs->src, match) < 0)
1145 return error("src refspec %s does not match any.", rs->src)(error("src refspec %s does not match any.", rs->src), const_error
());
1146 if (allocated_match)
1147 *allocated_match = 1;
1148 return 0;
1149 default:
1150 return error("src refspec %s matches more than one.", rs->src)(error("src refspec %s matches more than one.", rs->src), const_error
());
1151 }
1152}
1153
1154static int match_explicit(struct ref *src, struct ref *dst,
1155 struct ref ***dst_tail,
1156 struct refspec *rs)
1157{
1158 struct ref *matched_src, *matched_dst;
1159 int allocated_src;
1160
1161 const char *dst_value = rs->dst;
1162 char *dst_guess;
1163
1164 if (rs->pattern || rs->matching)
1165 return 0;
1166
1167 matched_src = matched_dst = NULL((void*)0);
1168 if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0)
1169 return -1;
1170
1171 if (!dst_value) {
1172 struct object_id oid;
1173 int flag;
1174
1175 dst_value = resolve_ref_unsafe(matched_src->name,
1176 RESOLVE_REF_READING0x01,
1177 oid.hash, &flag);
1178 if (!dst_value ||
1179 ((flag & REF_ISSYMREF0x01) &&
1180 !starts_with(dst_value, "refs/heads/")))
1181 die("%s cannot be resolved to branch.",
1182 matched_src->name);
1183 }
1184
1185 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1186 case 1:
1187 break;
1188 case 0:
1189 if (starts_with(dst_value, "refs/"))
1190 matched_dst = make_linked_ref(dst_value, dst_tail);
1191 else if (is_null_oid(&matched_src->new_oid))
1192 error("unable to delete '%s': remote ref does not exist",(error("unable to delete '%s': remote ref does not exist", dst_value
), const_error())
1193 dst_value)(error("unable to delete '%s': remote ref does not exist", dst_value
), const_error());
1194 else if ((dst_guess = guess_ref(dst_value, matched_src)))
1195 matched_dst = make_linked_ref(dst_guess, dst_tail);
1196 else
1197 error("unable to push to unqualified destination: %s\n"(error("unable to push to unqualified destination: %s\n" "The destination refspec neither matches an "
"existing ref on the remote nor\n" "begins with refs/, and we are unable to "
"guess a prefix based on the source ref.", dst_value), const_error
())
1198 "The destination refspec neither matches an "(error("unable to push to unqualified destination: %s\n" "The destination refspec neither matches an "
"existing ref on the remote nor\n" "begins with refs/, and we are unable to "
"guess a prefix based on the source ref.", dst_value), const_error
())
1199 "existing ref on the remote nor\n"(error("unable to push to unqualified destination: %s\n" "The destination refspec neither matches an "
"existing ref on the remote nor\n" "begins with refs/, and we are unable to "
"guess a prefix based on the source ref.", dst_value), const_error
())
1200 "begins with refs/, and we are unable to "(error("unable to push to unqualified destination: %s\n" "The destination refspec neither matches an "
"existing ref on the remote nor\n" "begins with refs/, and we are unable to "
"guess a prefix based on the source ref.", dst_value), const_error
())
1201 "guess a prefix based on the source ref.",(error("unable to push to unqualified destination: %s\n" "The destination refspec neither matches an "
"existing ref on the remote nor\n" "begins with refs/, and we are unable to "
"guess a prefix based on the source ref.", dst_value), const_error
())
1202 dst_value)(error("unable to push to unqualified destination: %s\n" "The destination refspec neither matches an "
"existing ref on the remote nor\n" "begins with refs/, and we are unable to "
"guess a prefix based on the source ref.", dst_value), const_error
());
1203 break;
1204 default:
1205 matched_dst = NULL((void*)0);
1206 error("dst refspec %s matches more than one.",(error("dst refspec %s matches more than one.", dst_value), const_error
())
1207 dst_value)(error("dst refspec %s matches more than one.", dst_value), const_error
());
1208 break;
1209 }
1210 if (!matched_dst)
1211 return -1;
1212 if (matched_dst->peer_ref)
1213 return error("dst ref %s receives from more than one src.",(error("dst ref %s receives from more than one src.", matched_dst
->name), const_error())
1214 matched_dst->name)(error("dst ref %s receives from more than one src.", matched_dst
->name), const_error());
1215 else {
1216 matched_dst->peer_ref = allocated_src ?
1217 matched_src :
1218 copy_ref(matched_src);
1219 matched_dst->force = rs->force;
1220 }
1221 return 0;
1222}
1223
1224static int match_explicit_refs(struct ref *src, struct ref *dst,
1225 struct ref ***dst_tail, struct refspec *rs,
1226 int rs_nr)
1227{
1228 int i, errs;
1229 for (i = errs = 0; i < rs_nr; i++)
1230 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1231 return errs;
1232}
1233
1234static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
1235 int send_mirror, int direction, const struct refspec **ret_pat)
1236{
1237 const struct refspec *pat;
1238 char *name;
1239 int i;
1240 int matching_refs = -1;
1241 for (i = 0; i < rs_nr; i++) {
1242 if (rs[i].matching &&
1243 (matching_refs == -1 || rs[i].force)) {
1244 matching_refs = i;
1245 continue;
1246 }
1247
1248 if (rs[i].pattern) {
1249 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
1250 int match;
1251 if (direction == FROM_SRC)
1252 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1253 else
1254 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1255 if (match) {
1256 matching_refs = i;
1257 break;
1258 }
1259 }
1260 }
1261 if (matching_refs == -1)
1262 return NULL((void*)0);
1263
1264 pat = rs + matching_refs;
1265 if (pat->matching) {
1266 /*
1267 * "matching refs"; traditionally we pushed everything
1268 * including refs outside refs/heads/ hierarchy, but
1269 * that does not make much sense these days.
1270 */
1271 if (!send_mirror && !starts_with(ref->name, "refs/heads/"))
1272 return NULL((void*)0);
1273 name = xstrdup(ref->name);
1274 }
1275 if (ret_pat)
1276 *ret_pat = pat;
1277 return name;
1278}
1279
1280static struct ref **tail_ref(struct ref **head)
1281{
1282 struct ref **tail = head;
1283 while (*tail)
1284 tail = &((*tail)->next);
1285 return tail;
1286}
1287
1288struct tips {
1289 struct commit **tip;
1290 int nr, alloc;
1291};
1292
1293static void add_to_tips(struct tips *tips, const struct object_id *oid)
1294{
1295 struct commit *commit;
1296
1297 if (is_null_oid(oid))
1298 return;
1299 commit = lookup_commit_reference_gently(oid->hash, 1);
1300 if (!commit || (commit->object.flags & TMP_MARK(1u<<4)))
1301 return;
1302 commit->object.flags |= TMP_MARK(1u<<4);
1303 ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc)do { if ((tips->nr + 1) > tips->alloc) { if ((((tips
->alloc)+16)*3/2) < (tips->nr + 1)) tips->alloc =
(tips->nr + 1); else tips->alloc = (((tips->alloc)+
16)*3/2); (tips->tip) = xrealloc((tips->tip), st_mult(sizeof
(*(tips->tip)), (tips->alloc))); } } while (0);
1304 tips->tip[tips->nr++] = commit;
1305}
1306
1307static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
1308{
1309 struct string_list dst_tag = STRING_LIST_INIT_NODUP{ ((void*)0), 0, 0, 0, ((void*)0) };
1310 struct string_list src_tag = STRING_LIST_INIT_NODUP{ ((void*)0), 0, 0, 0, ((void*)0) };
1311 struct string_list_item *item;
1312 struct ref *ref;
1313 struct tips sent_tips;
1314
1315 /*
1316 * Collect everything we know they would have at the end of
1317 * this push, and collect all tags they have.
1318 */
1319 memset(&sent_tips, 0, sizeof(sent_tips))__builtin___memset_chk (&sent_tips, 0, sizeof(sent_tips),
__builtin_object_size (&sent_tips, 0));
1320 for (ref = *dst; ref; ref = ref->next) {
1321 if (ref->peer_ref &&
1322 !is_null_oid(&ref->peer_ref->new_oid))
1323 add_to_tips(&sent_tips, &ref->peer_ref->new_oid);
1324 else
1325 add_to_tips(&sent_tips, &ref->old_oid);
1326 if (starts_with(ref->name, "refs/tags/"))
1327 string_list_append(&dst_tag, ref->name);
1328 }
1329 clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK(1u<<4));
1330
1331 string_list_sort(&dst_tag);
1332
1333 /* Collect tags they do not have. */
1334 for (ref = src; ref; ref = ref->next) {
1335 if (!starts_with(ref->name, "refs/tags/"))
1336 continue; /* not a tag */
1337 if (string_list_has_string(&dst_tag, ref->name))
1338 continue; /* they already have it */
1339 if (sha1_object_info(ref->new_oid.hash, NULL((void*)0)) != OBJ_TAG)
1340 continue; /* be conservative */
1341 item = string_list_append(&src_tag, ref->name);
1342 item->util = ref;
1343 }
1344 string_list_clear(&dst_tag, 0);
1345
1346 /*
1347 * At this point, src_tag lists tags that are missing from
1348 * dst, and sent_tips lists the tips we are pushing or those
1349 * that we know they already have. An element in the src_tag
1350 * that is an ancestor of any of the sent_tips needs to be
1351 * sent to the other side.
1352 */
1353 if (sent_tips.nr) {
1354 for_each_string_list_item(item, &src_tag)for (item = (&src_tag)->items; item < (&src_tag
)->items + (&src_tag)->nr; ++item) {
1355 struct ref *ref = item->util;
1356 struct ref *dst_ref;
1357 struct commit *commit;
1358
1359 if (is_null_oid(&ref->new_oid))
1360 continue;
1361 commit = lookup_commit_reference_gently(ref->new_oid.hash, 1);
1362 if (!commit)
1363 /* not pushing a commit, which is not an error */
1364 continue;
1365
1366 /*
1367 * Is this tag, which they do not have, reachable from
1368 * any of the commits we are sending?
1369 */
1370 if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
1371 continue;
1372
1373 /* Add it in */
1374 dst_ref = make_linked_ref(ref->name, dst_tail);
1375 oidcpy(&dst_ref->new_oid, &ref->new_oid);
1376 dst_ref->peer_ref = copy_ref(ref);
1377 }
1378 }
1379 string_list_clear(&src_tag, 0);
1380 free(sent_tips.tip);
1381}
1382
1383struct ref *find_ref_by_name(const struct ref *list, const char *name)
1384{
1385 for ( ; list; list = list->next)
1386 if (!strcmp(list->name, name))
1387 return (struct ref *)list;
1388 return NULL((void*)0);
1389}
1390
1391static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
1392{
1393 for ( ; ref; ref = ref->next)
1394 string_list_append_nodup(ref_index, ref->name)->util = ref;
1395
1396 string_list_sort(ref_index);
1397}
1398
1399/*
1400 * Given only the set of local refs, sanity-check the set of push
1401 * refspecs. We can't catch all errors that match_push_refs would,
1402 * but we can catch some errors early before even talking to the
1403 * remote side.
1404 */
1405int check_push_refs(struct ref *src, int nr_refspec, const char **refspec_names)
1406{
1407 struct refspec *refspec = parse_push_refspec(nr_refspec, refspec_names);
1408 int ret = 0;
1409 int i;
1410
1411 for (i = 0; i < nr_refspec; i++) {
1412 struct refspec *rs = refspec + i;
1413
1414 if (rs->pattern || rs->matching)
1415 continue;
1416
1417 ret |= match_explicit_lhs(src, rs, NULL((void*)0), NULL((void*)0));
1418 }
1419
1420 free_refspec(nr_refspec, refspec);
1421 return ret;
1422}
1423
1424/*
1425 * Given the set of refs the local repository has, the set of refs the
1426 * remote repository has, and the refspec used for push, determine
1427 * what remote refs we will update and with what value by setting
1428 * peer_ref (which object is being pushed) and force (if the push is
1429 * forced) in elements of "dst". The function may add new elements to
1430 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
1431 */
1432int match_push_refs(struct ref *src, struct ref **dst,
1433 int nr_refspec, const char **refspec, int flags)
1434{
1435 struct refspec *rs;
1436 int send_all = flags & MATCH_REFS_ALL;
1437 int send_mirror = flags & MATCH_REFS_MIRROR;
1438 int send_prune = flags & MATCH_REFS_PRUNE;
1439 int errs;
1440 static const char *default_refspec[] = { ":", NULL((void*)0) };
1441 struct ref *ref, **dst_tail = tail_ref(dst);
1442 struct string_list dst_ref_index = STRING_LIST_INIT_NODUP{ ((void*)0), 0, 0, 0, ((void*)0) };
1443
1444 if (!nr_refspec) {
1445 nr_refspec = 1;
1446 refspec = default_refspec;
1447 }
1448 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
1449 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
1450
1451 /* pick the remainder */
1452 for (ref = src; ref; ref = ref->next) {
1453 struct string_list_item *dst_item;
1454 struct ref *dst_peer;
1455 const struct refspec *pat = NULL((void*)0);
1456 char *dst_name;
1457
1458 dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
1459 if (!dst_name)
1460 continue;
1461
1462 if (!dst_ref_index.nr)
1463 prepare_ref_index(&dst_ref_index, *dst);
1464
1465 dst_item = string_list_lookup(&dst_ref_index, dst_name);
1466 dst_peer = dst_item ? dst_item->util : NULL((void*)0);
1467 if (dst_peer) {
1468 if (dst_peer->peer_ref)
1469 /* We're already sending something to this ref. */
1470 goto free_name;
1471 } else {
1472 if (pat->matching && !(send_all || send_mirror))
1473 /*
1474 * Remote doesn't have it, and we have no
1475 * explicit pattern, and we don't have
1476 * --all or --mirror.
1477 */
1478 goto free_name;
1479
1480 /* Create a new one and link it */
1481 dst_peer = make_linked_ref(dst_name, &dst_tail);
1482 oidcpy(&dst_peer->new_oid, &ref->new_oid);
1483 string_list_insert(&dst_ref_index,
1484 dst_peer->name)->util = dst_peer;
1485 }
1486 dst_peer->peer_ref = copy_ref(ref);
1487 dst_peer->force = pat->force;
1488 free_name:
1489 free(dst_name);
1490 }
1491
1492 string_list_clear(&dst_ref_index, 0);
1493
1494 if (flags & MATCH_REFS_FOLLOW_TAGS)
1495 add_missing_tags(src, dst, &dst_tail);
1496
1497 if (send_prune) {
1498 struct string_list src_ref_index = STRING_LIST_INIT_NODUP{ ((void*)0), 0, 0, 0, ((void*)0) };
1499 /* check for missing refs on the remote */
1500 for (ref = *dst; ref; ref = ref->next) {
1501 char *src_name;
1502
1503 if (ref->peer_ref)
1504 /* We're already sending something to this ref. */
1505 continue;
1506
1507 src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL((void*)0));
1508 if (src_name) {
1509 if (!src_ref_index.nr)
1510 prepare_ref_index(&src_ref_index, src);
1511 if (!string_list_has_string(&src_ref_index,
1512 src_name))
1513 ref->peer_ref = alloc_delete_ref();
1514 free(src_name);
1515 }
1516 }
1517 string_list_clear(&src_ref_index, 0);
1518 }
1519 if (errs)
1520 return -1;
1521 return 0;
1522}
1523
1524void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
1525 int force_update)
1526{
1527 struct ref *ref;
1528
1529 for (ref = remote_refs; ref; ref = ref->next) {
1530 int force_ref_update = ref->force || force_update;
1531 int reject_reason = 0;
1532
1533 if (ref->peer_ref)
1534 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1535 else if (!send_mirror)
1536 continue;
1537
1538 ref->deletion = is_null_oid(&ref->new_oid);
1539 if (!ref->deletion &&
1540 !oidcmp(&ref->old_oid, &ref->new_oid)) {
1541 ref->status = REF_STATUS_UPTODATE;
1542 continue;
1543 }
1544
1545 /*
1546 * If the remote ref has moved and is now different
1547 * from what we expect, reject any push.
1548 *
1549 * It also is an error if the user told us to check
1550 * with the remote-tracking branch to find the value
1551 * to expect, but we did not have such a tracking
1552 * branch.
1553 */
1554 if (ref->expect_old_sha1) {
1555 if (oidcmp(&ref->old_oid, &ref->old_oid_expect))
1556 reject_reason = REF_STATUS_REJECT_STALE;
1557 else
1558 /* If the ref isn't stale then force the update. */
1559 force_ref_update = 1;
1560 }
1561
1562 /*
1563 * If the update isn't already rejected then check
1564 * the usual "must fast-forward" rules.
1565 *
1566 * Decide whether an individual refspec A:B can be
1567 * pushed. The push will succeed if any of the
1568 * following are true:
1569 *
1570 * (1) the remote reference B does not exist
1571 *
1572 * (2) the remote reference B is being removed (i.e.,
1573 * pushing :B where no source is specified)
1574 *
1575 * (3) the destination is not under refs/tags/, and
1576 * if the old and new value is a commit, the new
1577 * is a descendant of the old.
1578 *
1579 * (4) it is forced using the +A:B notation, or by
1580 * passing the --force argument
1581 */
1582
1583 if (!reject_reason && !ref->deletion && !is_null_oid(&ref->old_oid)) {
1584 if (starts_with(ref->name, "refs/tags/"))
1585 reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
1586 else if (!has_object_file(&ref->old_oid))
1587 reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
1588 else if (!lookup_commit_reference_gently(ref->old_oid.hash, 1) ||
1589 !lookup_commit_reference_gently(ref->new_oid.hash, 1))
1590 reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
1591 else if (!ref_newer(&ref->new_oid, &ref->old_oid))
1592 reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
1593 }
1594
1595 /*
1596 * "--force" will defeat any rejection implemented
1597 * by the rules above.
1598 */
1599 if (!force_ref_update)
1600 ref->status = reject_reason;
1601 else if (reject_reason)
1602 ref->forced_update = 1;
1603 }
1604}
1605
1606static void set_merge(struct branch *ret)
1607{
1608 struct remote *remote;
1609 char *ref;
1610 struct object_id oid;
1611 int i;
1612
1613 if (!ret)
1614 return; /* no branch */
1615 if (ret->merge)
1616 return; /* already run */
1617 if (!ret->remote_name || !ret->merge_nr) {
1618 /*
1619 * no merge config; let's make sure we don't confuse callers
1620 * with a non-zero merge_nr but a NULL merge
1621 */
1622 ret->merge_nr = 0;
1623 return;
1624 }
1625
1626 remote = remote_get(ret->remote_name);
1627
1628 ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
1629 for (i = 0; i < ret->merge_nr; i++) {
1630 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1631 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
1632 if (!remote_find_tracking(remote, ret->merge[i]) ||
1633 strcmp(ret->remote_name, "."))
1634 continue;
1635 if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
1636 oid.hash, &ref) == 1)
1637 ret->merge[i]->dst = ref;
1638 else
1639 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1640 }
1641}
1642
1643struct branch *branch_get(const char *name)
1644{
1645 struct branch *ret;
1646
1647 read_config();
1648 if (!name || !*name || !strcmp(name, "HEAD"))
1649 ret = current_branch;
1650 else
1651 ret = make_branch(name, 0);
1652 set_merge(ret);
1653 return ret;
1654}
1655
1656int branch_has_merge_config(struct branch *branch)
1657{
1658 return branch && !!branch->merge;
1659}
1660
1661int branch_merge_matches(struct branch *branch,
1662 int i,
1663 const char *refname)
1664{
1665 if (!branch || i < 0 || i >= branch->merge_nr)
1666 return 0;
1667 return refname_match(branch->merge[i]->src, refname);
1668}
1669
1670__attribute__((format (printf,2,3)))
1671static const char *error_buf(struct strbuf *err, const char *fmt, ...)
1672{
1673 if (err) {
1674 va_list ap;
1675 va_start(ap, fmt)__builtin_va_start(ap, fmt);
1676 strbuf_vaddf(err, fmt, ap);
1677 va_end(ap)__builtin_va_end(ap);
1678 }
1679 return NULL((void*)0);
1680}
1681
1682const char *branch_get_upstream(struct branch *branch, struct strbuf *err)
1683{
1684 if (!branch)
1685 return error_buf(err, _("HEAD does not point to a branch"));
1686
1687 if (!branch->merge || !branch->merge[0]) {
1688 /*
1689 * no merge config; is it because the user didn't define any,
1690 * or because it is not a real branch, and get_branch
1691 * auto-vivified it?
1692 */
1693 if (!ref_exists(branch->refname))
1694 return error_buf(err, _("no such branch: '%s'"),
1695 branch->name);
1696 return error_buf(err,
1697 _("no upstream configured for branch '%s'"),
1698 branch->name);
1699 }
1700
1701 if (!branch->merge[0]->dst)
1702 return error_buf(err,
1703 _("upstream branch '%s' not stored as a remote-tracking branch"),
1704 branch->merge[0]->src);
1705
1706 return branch->merge[0]->dst;
1707}
1708
1709static const char *tracking_for_push_dest(struct remote *remote,
1710 const char *refname,
1711 struct strbuf *err)
1712{
1713 char *ret;
1714
1715 ret = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
1716 if (!ret)
1717 return error_buf(err,
1718 _("push destination '%s' on remote '%s' has no local tracking branch"),
1719 refname, remote->name);
1720 return ret;
1721}
1722
1723static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
1724{
1725 struct remote *remote;
1726
1727 remote = remote_get(pushremote_for_branch(branch, NULL((void*)0)));
1728 if (!remote)
1729 return error_buf(err,
1730 _("branch '%s' has no remote for pushing"),
1731 branch->name);
1732
1733 if (remote->push_refspec_nr) {
1734 char *dst;
1735 const char *ret;
1736
1737 dst = apply_refspecs(remote->push, remote->push_refspec_nr,
1738 branch->refname);
1739 if (!dst)
1740 return error_buf(err,
1741 _("push refspecs for '%s' do not include '%s'"),
1742 remote->name, branch->name);
1743
1744 ret = tracking_for_push_dest(remote, dst, err);
1745 free(dst);
1746 return ret;
1747 }
1748
1749 if (remote->mirror)
1750 return tracking_for_push_dest(remote, branch->refname, err);
1751
1752 switch (push_default) {
1753 case PUSH_DEFAULT_NOTHING:
1754 return error_buf(err, _("push has no destination (push.default is 'nothing')"));
1755
1756 case PUSH_DEFAULT_MATCHING:
1757 case PUSH_DEFAULT_CURRENT:
1758 return tracking_for_push_dest(remote, branch->refname, err);
1759
1760 case PUSH_DEFAULT_UPSTREAM:
1761 return branch_get_upstream(branch, err);
1762
1763 case PUSH_DEFAULT_UNSPECIFIED:
1764 case PUSH_DEFAULT_SIMPLE:
1765 {
1766 const char *up, *cur;
1767
1768 up = branch_get_upstream(branch, err);
1769 if (!up)
1770 return NULL((void*)0);
1771 cur = tracking_for_push_dest(remote, branch->refname, err);
1772 if (!cur)
1773 return NULL((void*)0);
1774 if (strcmp(cur, up))
1775 return error_buf(err,
1776 _("cannot resolve 'simple' push to a single destination"));
1777 return cur;
1778 }
1779 }
1780
1781 die("BUG: unhandled push situation");
1782}
1783
1784const char *branch_get_push(struct branch *branch, struct strbuf *err)
1785{
1786 if (!branch)
1787 return error_buf(err, _("HEAD does not point to a branch"));
1788
1789 if (!branch->push_tracking_ref)
1790 branch->push_tracking_ref = branch_get_push_1(branch, err);
1791 return branch->push_tracking_ref;
1792}
1793
1794static int ignore_symref_update(const char *refname)
1795{
1796 struct object_id oid;
1797 int flag;
1798
1799 if (!resolve_ref_unsafe(refname, 0, oid.hash, &flag))
1800 return 0; /* non-existing refs are OK */
1801 return (flag & REF_ISSYMREF0x01);
1802}
1803
1804/*
1805 * Create and return a list of (struct ref) consisting of copies of
1806 * each remote_ref that matches refspec. refspec must be a pattern.
1807 * Fill in the copies' peer_ref to describe the local tracking refs to
1808 * which they map. Omit any references that would map to an existing
1809 * local symbolic ref.
1810 */
1811static struct ref *get_expanded_map(const struct ref *remote_refs,
1812 const struct refspec *refspec)
1813{
1814 const struct ref *ref;
1815 struct ref *ret = NULL((void*)0);
1816 struct ref **tail = &ret;
1817
1818 for (ref = remote_refs; ref; ref = ref->next) {
3
←
Loop condition is true. Entering loop body
→
9
←
Loop condition is true. Entering loop body
→
15
←
Loop condition is true. Entering loop body
→
1819 char *expn_name = NULL((void*)0);
16
←
'expn_name' initialized to a null pointer value
→
1820
1821 if (strchr(ref->name, '^'))
4
←
Taking false branch
→
10
←
Taking false branch
→
17
←
Taking false branch
→
1822 continue; /* a dereference item */
1823 if (match_name_with_pattern(refspec->src, ref->name,
5
←
Calling 'match_name_with_pattern'
→
8
←
Returning from 'match_name_with_pattern'
→
11
←
Calling 'match_name_with_pattern'
→
14
←
Returning from 'match_name_with_pattern'
→
18
←
Calling 'match_name_with_pattern'
→
22
←
Returning from 'match_name_with_pattern'
→
23
←
Taking true branch
→
1824 refspec->dst, &expn_name) &&
1825 !ignore_symref_update(expn_name)) {
1826 struct ref *cpy = copy_ref(ref);
1827
1828 cpy->peer_ref = alloc_ref(expn_name);
24
←
Passing null pointer value via 1st parameter 'name'
→
25
←
Calling 'alloc_ref'
→
1829 if (refspec->force)
1830 cpy->peer_ref->force = 1;
1831 *tail = cpy;
1832 tail = &cpy->next;
1833 }
1834 free(expn_name);
1835 }
1836
1837 return ret;
1838}
1839
1840static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
1841{
1842 const struct ref *ref;
1843 for (ref = refs; ref; ref = ref->next) {
1844 if (refname_match(name, ref->name))
1845 return ref;
1846 }
1847 return NULL((void*)0);
1848}
1849
1850struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
1851{
1852 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
1853
1854 if (!ref)
1855 return NULL((void*)0);
1856
1857 return copy_ref(ref);
1858}
1859
1860static struct ref *get_local_ref(const char *name)
1861{
1862 if (!name || name[0] == '\0')
1863 return NULL((void*)0);
1864
1865 if (starts_with(name, "refs/"))
1866 return alloc_ref(name);
1867
1868 if (starts_with(name, "heads/") ||
1869 starts_with(name, "tags/") ||
1870 starts_with(name, "remotes/"))
1871 return alloc_ref_with_prefix("refs/", 5, name);
1872
1873 return alloc_ref_with_prefix("refs/heads/", 11, name);
1874}
1875
1876int get_fetch_map(const struct ref *remote_refs,
1877 const struct refspec *refspec,
1878 struct ref ***tail,
1879 int missing_ok)
1880{
1881 struct ref *ref_map, **rmp;
1882
1883 if (refspec->pattern) {
1
Taking true branch
→
1884 ref_map = get_expanded_map(remote_refs, refspec);
2
←
Calling 'get_expanded_map'
→
1885 } else {
1886 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1887
1888 if (refspec->exact_sha1) {
1889 ref_map = alloc_ref(name);
1890 get_oid_hex(name, &ref_map->old_oid);
1891 } else {
1892 ref_map = get_remote_ref(remote_refs, name);
1893 }
1894 if (!missing_ok && !ref_map)
1895 die("Couldn't find remote ref %s", name);
1896 if (ref_map) {
1897 ref_map->peer_ref = get_local_ref(refspec->dst);
1898 if (ref_map->peer_ref && refspec->force)
1899 ref_map->peer_ref->force = 1;
1900 }
1901 }
1902
1903 for (rmp = &ref_map; *rmp; ) {
1904 if ((*rmp)->peer_ref) {
1905 if (!starts_with((*rmp)->peer_ref->name, "refs/") ||
1906 check_refname_format((*rmp)->peer_ref->name, 0)) {
1907 struct ref *ignore = *rmp;
1908 error("* Ignoring funny ref '%s' locally",(error("* Ignoring funny ref '%s' locally", (*rmp)->peer_ref
->name), const_error())
1909 (*rmp)->peer_ref->name)(error("* Ignoring funny ref '%s' locally", (*rmp)->peer_ref
->name), const_error());
1910 *rmp = (*rmp)->next;
1911 free(ignore->peer_ref);
1912 free(ignore);
1913 continue;
1914 }
1915 }
1916 rmp = &((*rmp)->next);
1917 }
1918
1919 if (ref_map)
1920 tail_link_ref(ref_map, tail);
1921
1922 return 0;
1923}
1924
1925int resolve_remote_symref(struct ref *ref, struct ref *list)
1926{
1927 if (!ref->symref)
1928 return 0;
1929 for (; list; list = list->next)
1930 if (!strcmp(ref->symref, list->name)) {
1931 oidcpy(&ref->old_oid, &list->old_oid);
1932 return 0;
1933 }
1934 return 1;
1935}
1936
1937static void unmark_and_free(struct commit_list *list, unsigned int mark)
1938{
1939 while (list) {
1940 struct commit *commit = pop_commit(&list);
1941 commit->object.flags &= ~mark;
1942 }
1943}
1944
1945int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid)
1946{
1947 struct object *o;
1948 struct commit *old, *new;
1949 struct commit_list *list, *used;
1950 int found = 0;
1951
1952 /*
1953 * Both new and old must be commit-ish and new is descendant of
1954 * old. Otherwise we require --force.
1955 */
1956 o = deref_tag(parse_object(old_oid->hash), NULL((void*)0), 0);
1957 if (!o || o->type != OBJ_COMMIT)
1958 return 0;
1959 old = (struct commit *) o;
1960
1961 o = deref_tag(parse_object(new_oid->hash), NULL((void*)0), 0);
1962 if (!o || o->type != OBJ_COMMIT)
1963 return 0;
1964 new = (struct commit *) o;
1965
1966 if (parse_commit(new) < 0)
1967 return 0;
1968
1969 used = list = NULL((void*)0);
1970 commit_list_insert(new, &list);
1971 while (list) {
1972 new = pop_most_recent_commit(&list, TMP_MARK(1u<<4));
1973 commit_list_insert(new, &used);
1974 if (new == old) {
1975 found = 1;
1976 break;
1977 }
1978 }
1979 unmark_and_free(list, TMP_MARK(1u<<4));
1980 unmark_and_free(used, TMP_MARK(1u<<4));
1981 return found;
1982}
1983
1984/*
1985 * Compare a branch with its upstream, and save their differences (number
1986 * of commits) in *num_ours and *num_theirs. The name of the upstream branch
1987 * (or NULL if no upstream is defined) is returned via *upstream_name, if it
1988 * is not itself NULL.
1989 *
1990 * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
1991 * upstream defined, or ref does not exist), 0 otherwise.
1992 */
1993int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
1994 const char **upstream_name)
1995{
1996 struct object_id oid;
1997 struct commit *ours, *theirs;
1998 struct rev_info revs;
1999 const char *base;
2000 struct argv_array argv = ARGV_ARRAY_INIT{ empty_argv, 0, 0 };
2001
2002 /* Cannot stat unless we are marked to build on top of somebody else. */
2003 base = branch_get_upstream(branch, NULL((void*)0));
2004 if (upstream_name)
2005 *upstream_name = base;
2006 if (!base)
2007 return -1;
2008
2009 /* Cannot stat if what we used to build on no longer exists */
2010 if (read_ref(base, oid.hash))
2011 return -1;
2012 theirs = lookup_commit_reference(oid.hash);
2013 if (!theirs)
2014 return -1;
2015
2016 if (read_ref(branch->refname, oid.hash))
2017 return -1;
2018 ours = lookup_commit_reference(oid.hash);
2019 if (!ours)
2020 return -1;
2021
2022 /* are we the same? */
2023 if (theirs == ours) {
2024 *num_theirs = *num_ours = 0;
2025 return 0;
2026 }
2027
2028 /* Run "rev-list --left-right ours...theirs" internally... */
2029 argv_array_push(&argv, ""); /* ignored */
2030 argv_array_push(&argv, "--left-right");
2031 argv_array_pushf(&argv, "%s...%s",
2032 oid_to_hex(&ours->object.oid),
2033 oid_to_hex(&theirs->object.oid));
2034 argv_array_push(&argv, "--");
2035
2036 init_revisions(&revs, NULL((void*)0));
2037 setup_revisions(argv.argc, argv.argv, &revs, NULL((void*)0));
2038 if (prepare_revision_walk(&revs))
2039 die("revision walk setup failed");
2040
2041 /* ... and count the commits on each side. */
2042 *num_ours = 0;
2043 *num_theirs = 0;
2044 while (1) {
2045 struct commit *c = get_revision(&revs);
2046 if (!c)
2047 break;
2048 if (c->object.flags & SYMMETRIC_LEFT(1u<<8))
2049 (*num_ours)++;
2050 else
2051 (*num_theirs)++;
2052 }
2053
2054 /* clear object flags smudged by the above traversal */
2055 clear_commit_marks(ours, ALL_REV_FLAGS(((1u<<11)-1) | (1u<<26)));
2056 clear_commit_marks(theirs, ALL_REV_FLAGS(((1u<<11)-1) | (1u<<26)));
2057
2058 argv_array_clear(&argv);
2059 return 0;
2060}
2061
2062/*
2063 * Return true when there is anything to report, otherwise false.
2064 */
2065int format_tracking_info(struct branch *branch, struct strbuf *sb)
2066{
2067 int ours, theirs;
2068 const char *full_base;
2069 char *base;
2070 int upstream_is_gone = 0;
2071
2072 if (stat_tracking_info(branch, &ours, &theirs, &full_base) < 0) {
2073 if (!full_base)
2074 return 0;
2075 upstream_is_gone = 1;
2076 }
2077
2078 base = shorten_unambiguous_ref(full_base, 0);
2079 if (upstream_is_gone) {
2080 strbuf_addf(sb,
2081 _("Your branch is based on '%s', but the upstream is gone.\n"),
2082 base);
2083 if (advice_status_hints)
2084 strbuf_addstr(sb,
2085 _(" (use \"git branch --unset-upstream\" to fixup)\n"));
2086 } else if (!ours && !theirs) {
2087 strbuf_addf(sb,
2088 _("Your branch is up-to-date with '%s'.\n"),
2089 base);
2090 } else if (!theirs) {
2091 strbuf_addf(sb,
2092 Q_("Your branch is ahead of '%s' by %d commit.\n",
2093 "Your branch is ahead of '%s' by %d commits.\n",
2094 ours),
2095 base, ours);
2096 if (advice_status_hints)
2097 strbuf_addstr(sb,
2098 _(" (use \"git push\" to publish your local commits)\n"));
2099 } else if (!ours) {
2100 strbuf_addf(sb,
2101 Q_("Your branch is behind '%s' by %d commit, "
2102 "and can be fast-forwarded.\n",
2103 "Your branch is behind '%s' by %d commits, "
2104 "and can be fast-forwarded.\n",
2105 theirs),
2106 base, theirs);
2107 if (advice_status_hints)
2108 strbuf_addstr(sb,
2109 _(" (use \"git pull\" to update your local branch)\n"));
2110 } else {
2111 strbuf_addf(sb,
2112 Q_("Your branch and '%s' have diverged,\n"
2113 "and have %d and %d different commit each, "
2114 "respectively.\n",
2115 "Your branch and '%s' have diverged,\n"
2116 "and have %d and %d different commits each, "
2117 "respectively.\n",
2118 ours + theirs),
2119 base, ours, theirs);
2120 if (advice_status_hints)
2121 strbuf_addstr(sb,
2122 _(" (use \"git pull\" to merge the remote branch into yours)\n"));
2123 }
2124 free(base);
2125 return 1;
2126}
2127
2128static int one_local_ref(const char *refname, const struct object_id *oid,
2129 int flag, void *cb_data)
2130{
2131 struct ref ***local_tail = cb_data;
2132 struct ref *ref;
2133
2134 /* we already know it starts with refs/ to get here */
2135 if (check_refname_format(refname + 5, 0))
2136 return 0;
2137
2138 ref = alloc_ref(refname);
2139 oidcpy(&ref->new_oid, oid);
2140 **local_tail = ref;
2141 *local_tail = &ref->next;
2142 return 0;
2143}
2144
2145struct ref *get_local_heads(void)
2146{
2147 struct ref *local_refs = NULL((void*)0), **local_tail = &local_refs;
2148
2149 for_each_ref(one_local_ref, &local_tail);
2150 return local_refs;
2151}
2152
2153struct ref *guess_remote_head(const struct ref *head,
2154 const struct ref *refs,
2155 int all)
2156{
2157 const struct ref *r;
2158 struct ref *list = NULL((void*)0);
2159 struct ref **tail = &list;
2160
2161 if (!head)
2162 return NULL((void*)0);
2163
2164 /*
2165 * Some transports support directly peeking at
2166 * where HEAD points; if that is the case, then
2167 * we don't have to guess.
2168 */
2169 if (head->symref)
2170 return copy_ref(find_ref_by_name(refs, head->symref));
2171
2172 /* If refs/heads/master could be right, it is. */
2173 if (!all) {
2174 r = find_ref_by_name(refs, "refs/heads/master");
2175 if (r && !oidcmp(&r->old_oid, &head->old_oid))
2176 return copy_ref(r);
2177 }
2178
2179 /* Look for another ref that points there */
2180 for (r = refs; r; r = r->next) {
2181 if (r != head &&
2182 starts_with(r->name, "refs/heads/") &&
2183 !oidcmp(&r->old_oid, &head->old_oid)) {
2184 *tail = copy_ref(r);
2185 tail = &((*tail)->next);
2186 if (!all)
2187 break;
2188 }
2189 }
2190
2191 return list;
2192}
2193
2194struct stale_heads_info {
2195 struct string_list *ref_names;
2196 struct ref **stale_refs_tail;
2197 struct refspec *refs;
2198 int ref_count;
2199};
2200
2201static int get_stale_heads_cb(const char *refname, const struct object_id *oid,
2202 int flags, void *cb_data)
2203{
2204 struct stale_heads_info *info = cb_data;
2205 struct string_list matches = STRING_LIST_INIT_DUP{ ((void*)0), 0, 0, 1, ((void*)0) };
2206 struct refspec query;
2207 int i, stale = 1;
2208 memset(&query, 0, sizeof(struct refspec))__builtin___memset_chk (&query, 0, sizeof(struct refspec)
, __builtin_object_size (&query, 0));
2209 query.dst = (char *)refname;
2210
2211 query_refspecs_multiple(info->refs, info->ref_count, &query, &matches);
2212 if (matches.nr == 0)
2213 goto clean_exit; /* No matches */
2214
2215 /*
2216 * If we did find a suitable refspec and it's not a symref and
2217 * it's not in the list of refs that currently exist in that
2218 * remote, we consider it to be stale. In order to deal with
2219 * overlapping refspecs, we need to go over all of the
2220 * matching refs.
2221 */
2222 if (flags & REF_ISSYMREF0x01)
2223 goto clean_exit;
2224
2225 for (i = 0; stale && i < matches.nr; i++)
2226 if (string_list_has_string(info->ref_names, matches.items[i].string))
2227 stale = 0;
2228
2229 if (stale) {
2230 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
2231 oidcpy(&ref->new_oid, oid);
2232 }
2233
2234clean_exit:
2235 string_list_clear(&matches, 0);
2236 return 0;
2237}
2238
2239struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map)
2240{
2241 struct ref *ref, *stale_refs = NULL((void*)0);
2242 struct string_list ref_names = STRING_LIST_INIT_NODUP{ ((void*)0), 0, 0, 0, ((void*)0) };
2243 struct stale_heads_info info;
2244
2245 info.ref_names = &ref_names;
2246 info.stale_refs_tail = &stale_refs;
2247 info.refs = refs;
2248 info.ref_count = ref_count;
2249 for (ref = fetch_map; ref; ref = ref->next)
2250 string_list_append(&ref_names, ref->name);
2251 string_list_sort(&ref_names);
2252 for_each_ref(get_stale_heads_cb, &info);
2253 string_list_clear(&ref_names, 0);
2254 return stale_refs;
2255}
2256
2257/*
2258 * Compare-and-swap
2259 */
2260static void clear_cas_option(struct push_cas_option *cas)
2261{
2262 int i;
2263
2264 for (i = 0; i < cas->nr; i++)
2265 free(cas->entry[i].refname);
2266 free(cas->entry);
2267 memset(cas, 0, sizeof(*cas))__builtin___memset_chk (cas, 0, sizeof(*cas), __builtin_object_size
(cas, 0));
2268}
2269
2270static struct push_cas *add_cas_entry(struct push_cas_option *cas,
2271 const char *refname,
2272 size_t refnamelen)
2273{
2274 struct push_cas *entry;
2275 ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc)do { if ((cas->nr + 1) > cas->alloc) { if ((((cas->
alloc)+16)*3/2) < (cas->nr + 1)) cas->alloc = (cas->
nr + 1); else cas->alloc = (((cas->alloc)+16)*3/2); (cas
->entry) = xrealloc((cas->entry), st_mult(sizeof(*(cas->
entry)), (cas->alloc))); } } while (0);
2276 entry = &cas->entry[cas->nr++];
2277 memset(entry, 0, sizeof(*entry))__builtin___memset_chk (entry, 0, sizeof(*entry), __builtin_object_size
(entry, 0));
2278 entry->refname = xmemdupz(refname, refnamelen);
2279 return entry;
2280}
2281
2282int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
2283{
2284 const char *colon;
2285 struct push_cas *entry;
2286
2287 if (unset) {
2288 /* "--no-<option>" */
2289 clear_cas_option(cas);
2290 return 0;
2291 }
2292
2293 if (!arg) {
2294 /* just "--<option>" */
2295 cas->use_tracking_for_rest = 1;
2296 return 0;
2297 }
2298
2299 /* "--<option>=refname" or "--<option>=refname:value" */
2300 colon = strchrnulgitstrchrnul(arg, ':');
2301 entry = add_cas_entry(cas, arg, colon - arg);
2302 if (!*colon)
2303 entry->use_tracking = 1;
2304 else if (!colon[1])
2305 hashclr(entry->expect);
2306 else if (get_sha1(colon + 1, entry->expect))
2307 return error("cannot parse expected object name '%s'", colon + 1)(error("cannot parse expected object name '%s'", colon + 1), const_error
());
2308 return 0;
2309}
2310
2311int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset)
2312{
2313 return parse_push_cas_option(opt->value, arg, unset);
2314}
2315
2316int is_empty_cas(const struct push_cas_option *cas)
2317{
2318 return !cas->use_tracking_for_rest && !cas->nr;
2319}
2320
2321/*
2322 * Look at remote.fetch refspec and see if we have a remote
2323 * tracking branch for the refname there. Fill its current
2324 * value in sha1[].
2325 * If we cannot do so, return negative to signal an error.
2326 */
2327static int remote_tracking(struct remote *remote, const char *refname,
2328 struct object_id *oid)
2329{
2330 char *dst;
2331
2332 dst = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
2333 if (!dst)
2334 return -1; /* no tracking ref for refname at remote */
2335 if (read_ref(dst, oid->hash))
2336 return -1; /* we know what the tracking ref is but we cannot read it */
2337 return 0;
2338}
2339
2340static void apply_cas(struct push_cas_option *cas,
2341 struct remote *remote,
2342 struct ref *ref)
2343{
2344 int i;
2345
2346 /* Find an explicit --<option>=<name>[:<value>] entry */
2347 for (i = 0; i < cas->nr; i++) {
2348 struct push_cas *entry = &cas->entry[i];
2349 if (!refname_match(entry->refname, ref->name))
2350 continue;
2351 ref->expect_old_sha1 = 1;
2352 if (!entry->use_tracking)
2353 hashcpy(ref->old_oid_expect.hash, cas->entry[i].expect);
2354 else if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
2355 oidclr(&ref->old_oid_expect);
2356 return;
2357 }
2358
2359 /* Are we using "--<option>" to cover all? */
2360 if (!cas->use_tracking_for_rest)
2361 return;
2362
2363 ref->expect_old_sha1 = 1;
2364 if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
2365 oidclr(&ref->old_oid_expect);
2366}
2367
2368void apply_push_cas(struct push_cas_option *cas,
2369 struct remote *remote,
2370 struct ref *remote_refs)
2371{
2372 struct ref *ref;
2373 for (ref = remote_refs; ref; ref = ref->next)
2374 apply_cas(cas, remote, ref);
2375}