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Commit | Line | Data |
---|---|---|
26c8a533 | 1 | /* |
3a429d3b | 2 | * Utilities for paths and pathnames |
26c8a533 LT |
3 | */ |
4 | #include "cache.h" | |
c14c234f | 5 | #include "repository.h" |
395de250 | 6 | #include "strbuf.h" |
a5ccdbe4 | 7 | #include "string-list.h" |
77a6d840 | 8 | #include "dir.h" |
2e641d58 | 9 | #include "worktree.h" |
99b43a61 | 10 | #include "submodule-config.h" |
e7d72d07 | 11 | #include "path.h" |
0abe14f6 | 12 | #include "packfile.h" |
90c62155 | 13 | #include "object-store.h" |
26c8a533 | 14 | |
f66450ae | 15 | static int get_st_mode_bits(const char *path, int *mode) |
0117c2f0 TB |
16 | { |
17 | struct stat st; | |
18 | if (lstat(path, &st) < 0) | |
19 | return -1; | |
20 | *mode = st.st_mode; | |
21 | return 0; | |
22 | } | |
0117c2f0 | 23 | |
26c8a533 LT |
24 | static char bad_path[] = "/bad-path/"; |
25 | ||
4ef9caf5 | 26 | static struct strbuf *get_pathname(void) |
e7676d2f | 27 | { |
4ef9caf5 NTND |
28 | static struct strbuf pathname_array[4] = { |
29 | STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT | |
30 | }; | |
e7676d2f | 31 | static int index; |
bb84735c RS |
32 | struct strbuf *sb = &pathname_array[index]; |
33 | index = (index + 1) % ARRAY_SIZE(pathname_array); | |
4ef9caf5 NTND |
34 | strbuf_reset(sb); |
35 | return sb; | |
e7676d2f LT |
36 | } |
37 | ||
8262715b | 38 | static const char *cleanup_path(const char *path) |
26c8a533 LT |
39 | { |
40 | /* Clean it up */ | |
8262715b | 41 | if (skip_prefix(path, "./", &path)) { |
26c8a533 LT |
42 | while (*path == '/') |
43 | path++; | |
44 | } | |
45 | return path; | |
46 | } | |
47 | ||
4ef9caf5 NTND |
48 | static void strbuf_cleanup_path(struct strbuf *sb) |
49 | { | |
8262715b | 50 | const char *path = cleanup_path(sb->buf); |
4ef9caf5 NTND |
51 | if (path > sb->buf) |
52 | strbuf_remove(sb, 0, path - sb->buf); | |
53 | } | |
54 | ||
108bebea AR |
55 | char *mksnpath(char *buf, size_t n, const char *fmt, ...) |
56 | { | |
57 | va_list args; | |
58 | unsigned len; | |
59 | ||
60 | va_start(args, fmt); | |
61 | len = vsnprintf(buf, n, fmt, args); | |
62 | va_end(args); | |
63 | if (len >= n) { | |
9db56f71 | 64 | strlcpy(buf, bad_path, n); |
108bebea AR |
65 | return buf; |
66 | } | |
8262715b | 67 | return (char *)cleanup_path(buf); |
108bebea AR |
68 | } |
69 | ||
557bd833 | 70 | static int dir_prefix(const char *buf, const char *dir) |
fe2d7776 | 71 | { |
557bd833 NTND |
72 | int len = strlen(dir); |
73 | return !strncmp(buf, dir, len) && | |
74 | (is_dir_sep(buf[len]) || buf[len] == '\0'); | |
75 | } | |
fe2d7776 | 76 | |
557bd833 NTND |
77 | /* $buf =~ m|$dir/+$file| but without regex */ |
78 | static int is_dir_file(const char *buf, const char *dir, const char *file) | |
79 | { | |
80 | int len = strlen(dir); | |
81 | if (strncmp(buf, dir, len) || !is_dir_sep(buf[len])) | |
82 | return 0; | |
83 | while (is_dir_sep(buf[len])) | |
84 | len++; | |
85 | return !strcmp(buf + len, file); | |
86 | } | |
87 | ||
88 | static void replace_dir(struct strbuf *buf, int len, const char *newdir) | |
89 | { | |
90 | int newlen = strlen(newdir); | |
91 | int need_sep = (buf->buf[len] && !is_dir_sep(buf->buf[len])) && | |
92 | !is_dir_sep(newdir[newlen - 1]); | |
93 | if (need_sep) | |
94 | len--; /* keep one char, to be replaced with '/' */ | |
95 | strbuf_splice(buf, 0, len, newdir, newlen); | |
96 | if (need_sep) | |
97 | buf->buf[newlen] = '/'; | |
98 | } | |
99 | ||
0701530c DT |
100 | struct common_dir { |
101 | /* Not considered garbage for report_linked_checkout_garbage */ | |
102 | unsigned ignore_garbage:1; | |
103 | unsigned is_dir:1; | |
104 | /* Not common even though its parent is */ | |
105 | unsigned exclude:1; | |
106 | const char *dirname; | |
107 | }; | |
108 | ||
109 | static struct common_dir common_list[] = { | |
110 | { 0, 1, 0, "branches" }, | |
111 | { 0, 1, 0, "hooks" }, | |
112 | { 0, 1, 0, "info" }, | |
113 | { 0, 0, 1, "info/sparse-checkout" }, | |
114 | { 1, 1, 0, "logs" }, | |
115 | { 1, 1, 1, "logs/HEAD" }, | |
ce414b33 | 116 | { 0, 1, 1, "logs/refs/bisect" }, |
0701530c DT |
117 | { 0, 1, 0, "lost-found" }, |
118 | { 0, 1, 0, "objects" }, | |
119 | { 0, 1, 0, "refs" }, | |
ce414b33 | 120 | { 0, 1, 1, "refs/bisect" }, |
0701530c DT |
121 | { 0, 1, 0, "remotes" }, |
122 | { 0, 1, 0, "worktrees" }, | |
123 | { 0, 1, 0, "rr-cache" }, | |
124 | { 0, 1, 0, "svn" }, | |
125 | { 0, 0, 0, "config" }, | |
126 | { 1, 0, 0, "gc.pid" }, | |
127 | { 0, 0, 0, "packed-refs" }, | |
128 | { 0, 0, 0, "shallow" }, | |
129 | { 0, 0, 0, NULL } | |
c7b3a3d2 NTND |
130 | }; |
131 | ||
4e09cf2a DT |
132 | /* |
133 | * A compressed trie. A trie node consists of zero or more characters that | |
134 | * are common to all elements with this prefix, optionally followed by some | |
135 | * children. If value is not NULL, the trie node is a terminal node. | |
136 | * | |
137 | * For example, consider the following set of strings: | |
138 | * abc | |
139 | * def | |
140 | * definite | |
141 | * definition | |
142 | * | |
832c0e5e | 143 | * The trie would look like: |
4e09cf2a DT |
144 | * root: len = 0, children a and d non-NULL, value = NULL. |
145 | * a: len = 2, contents = bc, value = (data for "abc") | |
146 | * d: len = 2, contents = ef, children i non-NULL, value = (data for "def") | |
147 | * i: len = 3, contents = nit, children e and i non-NULL, value = NULL | |
148 | * e: len = 0, children all NULL, value = (data for "definite") | |
149 | * i: len = 2, contents = on, children all NULL, | |
150 | * value = (data for "definition") | |
151 | */ | |
152 | struct trie { | |
153 | struct trie *children[256]; | |
154 | int len; | |
155 | char *contents; | |
156 | void *value; | |
157 | }; | |
158 | ||
159 | static struct trie *make_trie_node(const char *key, void *value) | |
c7b3a3d2 | 160 | { |
4e09cf2a DT |
161 | struct trie *new_node = xcalloc(1, sizeof(*new_node)); |
162 | new_node->len = strlen(key); | |
163 | if (new_node->len) { | |
164 | new_node->contents = xmalloc(new_node->len); | |
165 | memcpy(new_node->contents, key, new_node->len); | |
166 | } | |
167 | new_node->value = value; | |
168 | return new_node; | |
169 | } | |
c7b3a3d2 | 170 | |
4e09cf2a DT |
171 | /* |
172 | * Add a key/value pair to a trie. The key is assumed to be \0-terminated. | |
173 | * If there was an existing value for this key, return it. | |
174 | */ | |
175 | static void *add_to_trie(struct trie *root, const char *key, void *value) | |
176 | { | |
177 | struct trie *child; | |
178 | void *old; | |
179 | int i; | |
180 | ||
181 | if (!*key) { | |
182 | /* we have reached the end of the key */ | |
183 | old = root->value; | |
184 | root->value = value; | |
185 | return old; | |
186 | } | |
187 | ||
188 | for (i = 0; i < root->len; i++) { | |
189 | if (root->contents[i] == key[i]) | |
190 | continue; | |
191 | ||
192 | /* | |
193 | * Split this node: child will contain this node's | |
194 | * existing children. | |
195 | */ | |
55d7d158 | 196 | child = xmalloc(sizeof(*child)); |
4e09cf2a DT |
197 | memcpy(child->children, root->children, sizeof(root->children)); |
198 | ||
199 | child->len = root->len - i - 1; | |
200 | if (child->len) { | |
201 | child->contents = xstrndup(root->contents + i + 1, | |
202 | child->len); | |
c7b3a3d2 | 203 | } |
4e09cf2a DT |
204 | child->value = root->value; |
205 | root->value = NULL; | |
206 | root->len = i; | |
207 | ||
208 | memset(root->children, 0, sizeof(root->children)); | |
209 | root->children[(unsigned char)root->contents[i]] = child; | |
210 | ||
211 | /* This is the newly-added child. */ | |
212 | root->children[(unsigned char)key[i]] = | |
213 | make_trie_node(key + i + 1, value); | |
214 | return NULL; | |
215 | } | |
216 | ||
217 | /* We have matched the entire compressed section */ | |
218 | if (key[i]) { | |
219 | child = root->children[(unsigned char)key[root->len]]; | |
220 | if (child) { | |
221 | return add_to_trie(child, key + root->len + 1, value); | |
222 | } else { | |
223 | child = make_trie_node(key + root->len + 1, value); | |
224 | root->children[(unsigned char)key[root->len]] = child; | |
225 | return NULL; | |
c7b3a3d2 NTND |
226 | } |
227 | } | |
4e09cf2a DT |
228 | |
229 | old = root->value; | |
230 | root->value = value; | |
231 | return old; | |
232 | } | |
233 | ||
234 | typedef int (*match_fn)(const char *unmatched, void *data, void *baton); | |
235 | ||
236 | /* | |
237 | * Search a trie for some key. Find the longest /-or-\0-terminated | |
238 | * prefix of the key for which the trie contains a value. Call fn | |
239 | * with the unmatched portion of the key and the found value, and | |
240 | * return its return value. If there is no such prefix, return -1. | |
241 | * | |
242 | * The key is partially normalized: consecutive slashes are skipped. | |
243 | * | |
244 | * For example, consider the trie containing only [refs, | |
245 | * refs/worktree] (both with values). | |
246 | * | |
247 | * | key | unmatched | val from node | return value | | |
248 | * |-----------------|------------|---------------|--------------| | |
249 | * | a | not called | n/a | -1 | | |
250 | * | refs | \0 | refs | as per fn | | |
251 | * | refs/ | / | refs | as per fn | | |
252 | * | refs/w | /w | refs | as per fn | | |
253 | * | refs/worktree | \0 | refs/worktree | as per fn | | |
254 | * | refs/worktree/ | / | refs/worktree | as per fn | | |
255 | * | refs/worktree/a | /a | refs/worktree | as per fn | | |
256 | * |-----------------|------------|---------------|--------------| | |
257 | * | |
258 | */ | |
259 | static int trie_find(struct trie *root, const char *key, match_fn fn, | |
260 | void *baton) | |
261 | { | |
262 | int i; | |
263 | int result; | |
264 | struct trie *child; | |
265 | ||
266 | if (!*key) { | |
267 | /* we have reached the end of the key */ | |
268 | if (root->value && !root->len) | |
269 | return fn(key, root->value, baton); | |
270 | else | |
271 | return -1; | |
272 | } | |
273 | ||
274 | for (i = 0; i < root->len; i++) { | |
275 | /* Partial path normalization: skip consecutive slashes. */ | |
276 | if (key[i] == '/' && key[i+1] == '/') { | |
277 | key++; | |
278 | continue; | |
279 | } | |
280 | if (root->contents[i] != key[i]) | |
281 | return -1; | |
282 | } | |
283 | ||
284 | /* Matched the entire compressed section */ | |
285 | key += i; | |
286 | if (!*key) | |
287 | /* End of key */ | |
288 | return fn(key, root->value, baton); | |
289 | ||
290 | /* Partial path normalization: skip consecutive slashes */ | |
291 | while (key[0] == '/' && key[1] == '/') | |
292 | key++; | |
293 | ||
294 | child = root->children[(unsigned char)*key]; | |
295 | if (child) | |
296 | result = trie_find(child, key + 1, fn, baton); | |
297 | else | |
298 | result = -1; | |
299 | ||
300 | if (result >= 0 || (*key != '/' && *key != 0)) | |
301 | return result; | |
302 | if (root->value) | |
303 | return fn(key, root->value, baton); | |
304 | else | |
305 | return -1; | |
306 | } | |
307 | ||
308 | static struct trie common_trie; | |
309 | static int common_trie_done_setup; | |
310 | ||
311 | static void init_common_trie(void) | |
312 | { | |
313 | struct common_dir *p; | |
314 | ||
315 | if (common_trie_done_setup) | |
316 | return; | |
317 | ||
318 | for (p = common_list; p->dirname; p++) | |
319 | add_to_trie(&common_trie, p->dirname, p); | |
320 | ||
321 | common_trie_done_setup = 1; | |
322 | } | |
323 | ||
324 | /* | |
325 | * Helper function for update_common_dir: returns 1 if the dir | |
326 | * prefix is common. | |
327 | */ | |
328 | static int check_common(const char *unmatched, void *value, void *baton) | |
329 | { | |
330 | struct common_dir *dir = value; | |
331 | ||
332 | if (!dir) | |
333 | return 0; | |
334 | ||
335 | if (dir->is_dir && (unmatched[0] == 0 || unmatched[0] == '/')) | |
336 | return !dir->exclude; | |
337 | ||
338 | if (!dir->is_dir && unmatched[0] == 0) | |
339 | return !dir->exclude; | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
1c630bad JH |
344 | static void update_common_dir(struct strbuf *buf, int git_dir_len, |
345 | const char *common_dir) | |
4e09cf2a DT |
346 | { |
347 | char *base = buf->buf + git_dir_len; | |
348 | init_common_trie(); | |
349 | if (trie_find(&common_trie, base, check_common, NULL) > 0) | |
1c630bad | 350 | replace_dir(buf, git_dir_len, common_dir); |
c7b3a3d2 NTND |
351 | } |
352 | ||
77a6d840 NTND |
353 | void report_linked_checkout_garbage(void) |
354 | { | |
355 | struct strbuf sb = STRBUF_INIT; | |
0701530c | 356 | const struct common_dir *p; |
77a6d840 NTND |
357 | int len; |
358 | ||
c14c234f | 359 | if (!the_repository->different_commondir) |
77a6d840 NTND |
360 | return; |
361 | strbuf_addf(&sb, "%s/", get_git_dir()); | |
362 | len = sb.len; | |
0701530c DT |
363 | for (p = common_list; p->dirname; p++) { |
364 | const char *path = p->dirname; | |
365 | if (p->ignore_garbage) | |
77a6d840 NTND |
366 | continue; |
367 | strbuf_setlen(&sb, len); | |
368 | strbuf_addstr(&sb, path); | |
369 | if (file_exists(sb.buf)) | |
0a489b06 | 370 | report_garbage(PACKDIR_FILE_GARBAGE, sb.buf); |
77a6d840 NTND |
371 | } |
372 | strbuf_release(&sb); | |
fe2d7776 AR |
373 | } |
374 | ||
f9a8a47e BW |
375 | static void adjust_git_path(const struct repository *repo, |
376 | struct strbuf *buf, int git_dir_len) | |
557bd833 NTND |
377 | { |
378 | const char *base = buf->buf + git_dir_len; | |
c14c234f | 379 | if (is_dir_file(base, "info", "grafts")) |
557bd833 | 380 | strbuf_splice(buf, 0, buf->len, |
f9a8a47e | 381 | repo->graft_file, strlen(repo->graft_file)); |
c14c234f | 382 | else if (!strcmp(base, "index")) |
557bd833 | 383 | strbuf_splice(buf, 0, buf->len, |
f9a8a47e | 384 | repo->index_file, strlen(repo->index_file)); |
c14c234f | 385 | else if (dir_prefix(base, "objects")) |
90c62155 | 386 | replace_dir(buf, git_dir_len + 7, repo->objects->objectdir); |
9445b492 JS |
387 | else if (git_hooks_path && dir_prefix(base, "hooks")) |
388 | replace_dir(buf, git_dir_len + 5, git_hooks_path); | |
f9a8a47e BW |
389 | else if (repo->different_commondir) |
390 | update_common_dir(buf, git_dir_len, repo->commondir); | |
557bd833 NTND |
391 | } |
392 | ||
f9a8a47e BW |
393 | static void strbuf_worktree_gitdir(struct strbuf *buf, |
394 | const struct repository *repo, | |
395 | const struct worktree *wt) | |
396 | { | |
397 | if (!wt) | |
398 | strbuf_addstr(buf, repo->gitdir); | |
399 | else if (!wt->id) | |
400 | strbuf_addstr(buf, repo->commondir); | |
401 | else | |
402 | strbuf_git_common_path(buf, repo, "worktrees/%s", wt->id); | |
403 | } | |
404 | ||
405 | static void do_git_path(const struct repository *repo, | |
406 | const struct worktree *wt, struct strbuf *buf, | |
2e641d58 | 407 | const char *fmt, va_list args) |
fe2d7776 | 408 | { |
557bd833 | 409 | int gitdir_len; |
f9a8a47e | 410 | strbuf_worktree_gitdir(buf, repo, wt); |
4ef9caf5 NTND |
411 | if (buf->len && !is_dir_sep(buf->buf[buf->len - 1])) |
412 | strbuf_addch(buf, '/'); | |
557bd833 | 413 | gitdir_len = buf->len; |
4ef9caf5 | 414 | strbuf_vaddf(buf, fmt, args); |
54310733 BW |
415 | if (!wt) |
416 | adjust_git_path(repo, buf, gitdir_len); | |
4ef9caf5 | 417 | strbuf_cleanup_path(buf); |
fe2d7776 AR |
418 | } |
419 | ||
3181d863 BW |
420 | char *repo_git_path(const struct repository *repo, |
421 | const char *fmt, ...) | |
422 | { | |
423 | struct strbuf path = STRBUF_INIT; | |
424 | va_list args; | |
425 | va_start(args, fmt); | |
426 | do_git_path(repo, NULL, &path, fmt, args); | |
427 | va_end(args); | |
428 | return strbuf_detach(&path, NULL); | |
429 | } | |
430 | ||
431 | void strbuf_repo_git_path(struct strbuf *sb, | |
432 | const struct repository *repo, | |
433 | const char *fmt, ...) | |
434 | { | |
435 | va_list args; | |
436 | va_start(args, fmt); | |
437 | do_git_path(repo, NULL, sb, fmt, args); | |
438 | va_end(args); | |
439 | } | |
440 | ||
bb3788ce JK |
441 | char *git_path_buf(struct strbuf *buf, const char *fmt, ...) |
442 | { | |
443 | va_list args; | |
444 | strbuf_reset(buf); | |
445 | va_start(args, fmt); | |
f9a8a47e | 446 | do_git_path(the_repository, NULL, buf, fmt, args); |
bb3788ce JK |
447 | va_end(args); |
448 | return buf->buf; | |
449 | } | |
450 | ||
1a83c240 | 451 | void strbuf_git_path(struct strbuf *sb, const char *fmt, ...) |
aba13e7c AR |
452 | { |
453 | va_list args; | |
454 | va_start(args, fmt); | |
f9a8a47e | 455 | do_git_path(the_repository, NULL, sb, fmt, args); |
aba13e7c | 456 | va_end(args); |
aba13e7c AR |
457 | } |
458 | ||
57a23b77 | 459 | const char *git_path(const char *fmt, ...) |
aba13e7c | 460 | { |
57a23b77 | 461 | struct strbuf *pathname = get_pathname(); |
aba13e7c AR |
462 | va_list args; |
463 | va_start(args, fmt); | |
f9a8a47e | 464 | do_git_path(the_repository, NULL, pathname, fmt, args); |
aba13e7c | 465 | va_end(args); |
57a23b77 | 466 | return pathname->buf; |
aba13e7c AR |
467 | } |
468 | ||
aba13e7c | 469 | char *git_pathdup(const char *fmt, ...) |
21cf3227 | 470 | { |
4ef9caf5 | 471 | struct strbuf path = STRBUF_INIT; |
21cf3227 | 472 | va_list args; |
21cf3227 | 473 | va_start(args, fmt); |
f9a8a47e | 474 | do_git_path(the_repository, NULL, &path, fmt, args); |
21cf3227 | 475 | va_end(args); |
4ef9caf5 | 476 | return strbuf_detach(&path, NULL); |
21cf3227 HKNN |
477 | } |
478 | ||
21cf3227 | 479 | char *mkpathdup(const char *fmt, ...) |
26c8a533 | 480 | { |
21cf3227 | 481 | struct strbuf sb = STRBUF_INIT; |
26c8a533 | 482 | va_list args; |
26c8a533 | 483 | va_start(args, fmt); |
21cf3227 | 484 | strbuf_vaddf(&sb, fmt, args); |
26c8a533 | 485 | va_end(args); |
4ef9caf5 NTND |
486 | strbuf_cleanup_path(&sb); |
487 | return strbuf_detach(&sb, NULL); | |
26c8a533 LT |
488 | } |
489 | ||
dcf69262 | 490 | const char *mkpath(const char *fmt, ...) |
26c8a533 | 491 | { |
26c8a533 | 492 | va_list args; |
4ef9caf5 | 493 | struct strbuf *pathname = get_pathname(); |
26c8a533 | 494 | va_start(args, fmt); |
4ef9caf5 | 495 | strbuf_vaddf(pathname, fmt, args); |
26c8a533 | 496 | va_end(args); |
4ef9caf5 | 497 | return cleanup_path(pathname->buf); |
26c8a533 | 498 | } |
f2db68ed | 499 | |
2e641d58 NTND |
500 | const char *worktree_git_path(const struct worktree *wt, const char *fmt, ...) |
501 | { | |
502 | struct strbuf *pathname = get_pathname(); | |
503 | va_list args; | |
504 | va_start(args, fmt); | |
f9a8a47e | 505 | do_git_path(the_repository, wt, pathname, fmt, args); |
2e641d58 NTND |
506 | va_end(args); |
507 | return pathname->buf; | |
508 | } | |
509 | ||
b42b0c09 BW |
510 | static void do_worktree_path(const struct repository *repo, |
511 | struct strbuf *buf, | |
512 | const char *fmt, va_list args) | |
513 | { | |
514 | strbuf_addstr(buf, repo->worktree); | |
515 | if(buf->len && !is_dir_sep(buf->buf[buf->len - 1])) | |
516 | strbuf_addch(buf, '/'); | |
517 | ||
518 | strbuf_vaddf(buf, fmt, args); | |
519 | strbuf_cleanup_path(buf); | |
520 | } | |
521 | ||
522 | char *repo_worktree_path(const struct repository *repo, const char *fmt, ...) | |
523 | { | |
524 | struct strbuf path = STRBUF_INIT; | |
525 | va_list args; | |
526 | ||
527 | if (!repo->worktree) | |
528 | return NULL; | |
529 | ||
530 | va_start(args, fmt); | |
531 | do_worktree_path(repo, &path, fmt, args); | |
532 | va_end(args); | |
533 | ||
534 | return strbuf_detach(&path, NULL); | |
535 | } | |
536 | ||
537 | void strbuf_repo_worktree_path(struct strbuf *sb, | |
538 | const struct repository *repo, | |
539 | const char *fmt, ...) | |
540 | { | |
541 | va_list args; | |
542 | ||
543 | if (!repo->worktree) | |
544 | return; | |
545 | ||
546 | va_start(args, fmt); | |
547 | do_worktree_path(repo, sb, fmt, args); | |
548 | va_end(args); | |
549 | } | |
550 | ||
99b43a61 | 551 | /* Returns 0 on success, negative on failure. */ |
99b43a61 JK |
552 | static int do_submodule_path(struct strbuf *buf, const char *path, |
553 | const char *fmt, va_list args) | |
0bad611b | 554 | { |
11f9dd71 MK |
555 | struct strbuf git_submodule_common_dir = STRBUF_INIT; |
556 | struct strbuf git_submodule_dir = STRBUF_INIT; | |
bbbb7de7 | 557 | int ret; |
0bad611b | 558 | |
bbbb7de7 NTND |
559 | ret = submodule_to_gitdir(&git_submodule_dir, path); |
560 | if (ret) | |
561 | goto cleanup; | |
0bad611b | 562 | |
bbbb7de7 NTND |
563 | strbuf_complete(&git_submodule_dir, '/'); |
564 | strbuf_addbuf(buf, &git_submodule_dir); | |
4ef9caf5 | 565 | strbuf_vaddf(buf, fmt, args); |
11f9dd71 MK |
566 | |
567 | if (get_common_dir_noenv(&git_submodule_common_dir, git_submodule_dir.buf)) | |
568 | update_common_dir(buf, git_submodule_dir.len, git_submodule_common_dir.buf); | |
569 | ||
4ef9caf5 | 570 | strbuf_cleanup_path(buf); |
11f9dd71 | 571 | |
99b43a61 | 572 | cleanup: |
11f9dd71 MK |
573 | strbuf_release(&git_submodule_dir); |
574 | strbuf_release(&git_submodule_common_dir); | |
bbbb7de7 | 575 | return ret; |
f5895fd3 JK |
576 | } |
577 | ||
f5895fd3 JK |
578 | char *git_pathdup_submodule(const char *path, const char *fmt, ...) |
579 | { | |
99b43a61 | 580 | int err; |
f5895fd3 JK |
581 | va_list args; |
582 | struct strbuf buf = STRBUF_INIT; | |
583 | va_start(args, fmt); | |
99b43a61 | 584 | err = do_submodule_path(&buf, path, fmt, args); |
f5895fd3 | 585 | va_end(args); |
99b43a61 JK |
586 | if (err) { |
587 | strbuf_release(&buf); | |
588 | return NULL; | |
589 | } | |
f5895fd3 JK |
590 | return strbuf_detach(&buf, NULL); |
591 | } | |
592 | ||
99b43a61 JK |
593 | int strbuf_git_path_submodule(struct strbuf *buf, const char *path, |
594 | const char *fmt, ...) | |
f5895fd3 | 595 | { |
99b43a61 | 596 | int err; |
f5895fd3 JK |
597 | va_list args; |
598 | va_start(args, fmt); | |
99b43a61 | 599 | err = do_submodule_path(buf, path, fmt, args); |
f5895fd3 | 600 | va_end(args); |
99b43a61 JK |
601 | |
602 | return err; | |
f5895fd3 JK |
603 | } |
604 | ||
b337172c BW |
605 | static void do_git_common_path(const struct repository *repo, |
606 | struct strbuf *buf, | |
15cdfea7 NTND |
607 | const char *fmt, |
608 | va_list args) | |
609 | { | |
b337172c | 610 | strbuf_addstr(buf, repo->commondir); |
15cdfea7 NTND |
611 | if (buf->len && !is_dir_sep(buf->buf[buf->len - 1])) |
612 | strbuf_addch(buf, '/'); | |
613 | strbuf_vaddf(buf, fmt, args); | |
614 | strbuf_cleanup_path(buf); | |
615 | } | |
616 | ||
617 | const char *git_common_path(const char *fmt, ...) | |
618 | { | |
619 | struct strbuf *pathname = get_pathname(); | |
620 | va_list args; | |
621 | va_start(args, fmt); | |
b337172c | 622 | do_git_common_path(the_repository, pathname, fmt, args); |
15cdfea7 NTND |
623 | va_end(args); |
624 | return pathname->buf; | |
625 | } | |
626 | ||
b337172c BW |
627 | void strbuf_git_common_path(struct strbuf *sb, |
628 | const struct repository *repo, | |
629 | const char *fmt, ...) | |
15cdfea7 NTND |
630 | { |
631 | va_list args; | |
632 | va_start(args, fmt); | |
b337172c | 633 | do_git_common_path(repo, sb, fmt, args); |
15cdfea7 NTND |
634 | va_end(args); |
635 | } | |
636 | ||
c847f537 | 637 | int validate_headref(const char *path) |
0870ca7f JH |
638 | { |
639 | struct stat st; | |
7eb4b9d0 JK |
640 | char buffer[256]; |
641 | const char *refname; | |
0bca165f | 642 | struct object_id oid; |
0104ca09 HO |
643 | int fd; |
644 | ssize_t len; | |
0870ca7f JH |
645 | |
646 | if (lstat(path, &st) < 0) | |
647 | return -1; | |
648 | ||
649 | /* Make sure it is a "refs/.." symlink */ | |
650 | if (S_ISLNK(st.st_mode)) { | |
651 | len = readlink(path, buffer, sizeof(buffer)-1); | |
222b1673 | 652 | if (len >= 5 && !memcmp("refs/", buffer, 5)) |
0870ca7f JH |
653 | return 0; |
654 | return -1; | |
655 | } | |
656 | ||
657 | /* | |
658 | * Anything else, just open it and try to see if it is a symbolic ref. | |
659 | */ | |
660 | fd = open(path, O_RDONLY); | |
661 | if (fd < 0) | |
662 | return -1; | |
93d26e4c | 663 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
0870ca7f JH |
664 | close(fd); |
665 | ||
6e68c914 JK |
666 | if (len < 0) |
667 | return -1; | |
668 | buffer[len] = '\0'; | |
669 | ||
0870ca7f JH |
670 | /* |
671 | * Is it a symbolic ref? | |
672 | */ | |
7eb4b9d0 JK |
673 | if (skip_prefix(buffer, "ref:", &refname)) { |
674 | while (isspace(*refname)) | |
675 | refname++; | |
676 | if (starts_with(refname, "refs/")) | |
c847f537 JH |
677 | return 0; |
678 | } | |
679 | ||
680 | /* | |
681 | * Is this a detached HEAD? | |
682 | */ | |
0bca165f | 683 | if (!get_oid_hex(buffer, &oid)) |
0870ca7f | 684 | return 0; |
c847f537 | 685 | |
0870ca7f JH |
686 | return -1; |
687 | } | |
688 | ||
395de250 | 689 | static struct passwd *getpw_str(const char *username, size_t len) |
54f4b874 | 690 | { |
d79374c7 | 691 | struct passwd *pw; |
5c0b13f8 | 692 | char *username_z = xmemdupz(username, len); |
395de250 MM |
693 | pw = getpwnam(username_z); |
694 | free(username_z); | |
695 | return pw; | |
696 | } | |
54f4b874 | 697 | |
395de250 MM |
698 | /* |
699 | * Return a string with ~ and ~user expanded via getpw*. If buf != NULL, | |
700 | * then it is a newly allocated string. Returns NULL on getpw failure or | |
701 | * if path is NULL. | |
4aad2f16 NTND |
702 | * |
703 | * If real_home is true, real_path($HOME) is used in the expansion. | |
395de250 | 704 | */ |
4aad2f16 | 705 | char *expand_user_path(const char *path, int real_home) |
395de250 MM |
706 | { |
707 | struct strbuf user_path = STRBUF_INIT; | |
395de250 MM |
708 | const char *to_copy = path; |
709 | ||
710 | if (path == NULL) | |
711 | goto return_null; | |
712 | if (path[0] == '~') { | |
53ec551c | 713 | const char *first_slash = strchrnul(path, '/'); |
395de250 MM |
714 | const char *username = path + 1; |
715 | size_t username_len = first_slash - username; | |
df2a79f4 MM |
716 | if (username_len == 0) { |
717 | const char *home = getenv("HOME"); | |
79bf1490 JN |
718 | if (!home) |
719 | goto return_null; | |
4aad2f16 | 720 | if (real_home) |
fa2bb344 | 721 | strbuf_add_real_path(&user_path, home); |
4aad2f16 NTND |
722 | else |
723 | strbuf_addstr(&user_path, home); | |
5ca6b7bb JS |
724 | #ifdef GIT_WINDOWS_NATIVE |
725 | convert_slashes(user_path.buf); | |
726 | #endif | |
df2a79f4 MM |
727 | } else { |
728 | struct passwd *pw = getpw_str(username, username_len); | |
729 | if (!pw) | |
730 | goto return_null; | |
cedc61a9 | 731 | strbuf_addstr(&user_path, pw->pw_dir); |
54f4b874 | 732 | } |
395de250 | 733 | to_copy = first_slash; |
d79374c7 | 734 | } |
cedc61a9 | 735 | strbuf_addstr(&user_path, to_copy); |
395de250 MM |
736 | return strbuf_detach(&user_path, NULL); |
737 | return_null: | |
738 | strbuf_release(&user_path); | |
739 | return NULL; | |
54f4b874 AE |
740 | } |
741 | ||
d79374c7 JH |
742 | /* |
743 | * First, one directory to try is determined by the following algorithm. | |
744 | * | |
745 | * (0) If "strict" is given, the path is used as given and no DWIM is | |
746 | * done. Otherwise: | |
747 | * (1) "~/path" to mean path under the running user's home directory; | |
748 | * (2) "~user/path" to mean path under named user's home directory; | |
749 | * (3) "relative/path" to mean cwd relative directory; or | |
750 | * (4) "/absolute/path" to mean absolute directory. | |
751 | * | |
c8c3f1d0 PT |
752 | * Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git" |
753 | * in this order. We select the first one that is a valid git repository, and | |
754 | * chdir() to it. If none match, or we fail to chdir, we return NULL. | |
d79374c7 JH |
755 | * |
756 | * If all goes well, we return the directory we used to chdir() (but | |
757 | * before ~user is expanded), avoiding getcwd() resolving symbolic | |
758 | * links. User relative paths are also returned as they are given, | |
759 | * except DWIM suffixing. | |
760 | */ | |
1c64b48e | 761 | const char *enter_repo(const char *path, int strict) |
54f4b874 | 762 | { |
e9ba6781 JK |
763 | static struct strbuf validated_path = STRBUF_INIT; |
764 | static struct strbuf used_path = STRBUF_INIT; | |
d79374c7 JH |
765 | |
766 | if (!path) | |
54f4b874 AE |
767 | return NULL; |
768 | ||
d79374c7 JH |
769 | if (!strict) { |
770 | static const char *suffix[] = { | |
b3256eb8 | 771 | "/.git", "", ".git/.git", ".git", NULL, |
d79374c7 | 772 | }; |
03106768 | 773 | const char *gitfile; |
d79374c7 JH |
774 | int len = strlen(path); |
775 | int i; | |
1c64b48e | 776 | while ((1 < len) && (path[len-1] == '/')) |
d79374c7 | 777 | len--; |
1c64b48e | 778 | |
e9ba6781 JK |
779 | /* |
780 | * We can handle arbitrary-sized buffers, but this remains as a | |
781 | * sanity check on untrusted input. | |
782 | */ | |
d79374c7 | 783 | if (PATH_MAX <= len) |
54f4b874 | 784 | return NULL; |
1c64b48e | 785 | |
e9ba6781 JK |
786 | strbuf_reset(&used_path); |
787 | strbuf_reset(&validated_path); | |
788 | strbuf_add(&used_path, path, len); | |
789 | strbuf_add(&validated_path, path, len); | |
790 | ||
791 | if (used_path.buf[0] == '~') { | |
4aad2f16 | 792 | char *newpath = expand_user_path(used_path.buf, 0); |
e9ba6781 | 793 | if (!newpath) |
d79374c7 | 794 | return NULL; |
e9ba6781 JK |
795 | strbuf_attach(&used_path, newpath, strlen(newpath), |
796 | strlen(newpath)); | |
d79374c7 | 797 | } |
d79374c7 | 798 | for (i = 0; suffix[i]; i++) { |
b3256eb8 | 799 | struct stat st; |
e9ba6781 JK |
800 | size_t baselen = used_path.len; |
801 | strbuf_addstr(&used_path, suffix[i]); | |
802 | if (!stat(used_path.buf, &st) && | |
b3256eb8 | 803 | (S_ISREG(st.st_mode) || |
e9ba6781 JK |
804 | (S_ISDIR(st.st_mode) && is_git_directory(used_path.buf)))) { |
805 | strbuf_addstr(&validated_path, suffix[i]); | |
d79374c7 JH |
806 | break; |
807 | } | |
e9ba6781 | 808 | strbuf_setlen(&used_path, baselen); |
d79374c7 | 809 | } |
03106768 PH |
810 | if (!suffix[i]) |
811 | return NULL; | |
78891795 | 812 | gitfile = read_gitfile(used_path.buf); |
e9ba6781 JK |
813 | if (gitfile) { |
814 | strbuf_reset(&used_path); | |
815 | strbuf_addstr(&used_path, gitfile); | |
816 | } | |
817 | if (chdir(used_path.buf)) | |
0870ca7f | 818 | return NULL; |
e9ba6781 | 819 | path = validated_path.buf; |
0870ca7f | 820 | } |
1f5fbe1f NTND |
821 | else { |
822 | const char *gitfile = read_gitfile(path); | |
823 | if (gitfile) | |
824 | path = gitfile; | |
825 | if (chdir(path)) | |
826 | return NULL; | |
827 | } | |
54f4b874 | 828 | |
0f64cc40 | 829 | if (is_git_directory(".")) { |
717c3972 | 830 | set_git_dir("."); |
1644162a | 831 | check_repository_format(); |
d79374c7 | 832 | return path; |
54f4b874 AE |
833 | } |
834 | ||
835 | return NULL; | |
836 | } | |
138086a7 | 837 | |
cbe43b84 | 838 | static int calc_shared_perm(int mode) |
138086a7 | 839 | { |
cbe43b84 | 840 | int tweak; |
138086a7 | 841 | |
7875acb6 JK |
842 | if (get_shared_repository() < 0) |
843 | tweak = -get_shared_repository(); | |
5a688fe4 | 844 | else |
7875acb6 | 845 | tweak = get_shared_repository(); |
5a688fe4 JH |
846 | |
847 | if (!(mode & S_IWUSR)) | |
848 | tweak &= ~0222; | |
849 | if (mode & S_IXUSR) | |
850 | /* Copy read bits to execute bits */ | |
851 | tweak |= (tweak & 0444) >> 2; | |
7875acb6 | 852 | if (get_shared_repository() < 0) |
5a688fe4 JH |
853 | mode = (mode & ~0777) | tweak; |
854 | else | |
8c6202d8 | 855 | mode |= tweak; |
06cbe855 | 856 | |
cbe43b84 TB |
857 | return mode; |
858 | } | |
859 | ||
860 | ||
861 | int adjust_shared_perm(const char *path) | |
862 | { | |
863 | int old_mode, new_mode; | |
864 | ||
7875acb6 | 865 | if (!get_shared_repository()) |
cbe43b84 TB |
866 | return 0; |
867 | if (get_st_mode_bits(path, &old_mode) < 0) | |
868 | return -1; | |
869 | ||
870 | new_mode = calc_shared_perm(old_mode); | |
871 | if (S_ISDIR(old_mode)) { | |
06cbe855 | 872 | /* Copy read bits to execute bits */ |
cbe43b84 TB |
873 | new_mode |= (new_mode & 0444) >> 2; |
874 | new_mode |= FORCE_DIR_SET_GID; | |
06cbe855 HO |
875 | } |
876 | ||
cbe43b84 TB |
877 | if (((old_mode ^ new_mode) & ~S_IFMT) && |
878 | chmod(path, (new_mode & ~S_IFMT)) < 0) | |
138086a7 JH |
879 | return -2; |
880 | return 0; | |
881 | } | |
e5392c51 | 882 | |
eb33876c DT |
883 | void safe_create_dir(const char *dir, int share) |
884 | { | |
885 | if (mkdir(dir, 0777) < 0) { | |
886 | if (errno != EEXIST) { | |
887 | perror(dir); | |
888 | exit(1); | |
889 | } | |
890 | } | |
891 | else if (share && adjust_shared_perm(dir)) | |
892 | die(_("Could not make %s writable by group"), dir); | |
893 | } | |
894 | ||
7fbd4221 JX |
895 | static int have_same_root(const char *path1, const char *path2) |
896 | { | |
897 | int is_abs1, is_abs2; | |
898 | ||
899 | is_abs1 = is_absolute_path(path1); | |
900 | is_abs2 = is_absolute_path(path2); | |
901 | return (is_abs1 && is_abs2 && tolower(path1[0]) == tolower(path2[0])) || | |
902 | (!is_abs1 && !is_abs2); | |
903 | } | |
904 | ||
e02ca72f JX |
905 | /* |
906 | * Give path as relative to prefix. | |
907 | * | |
908 | * The strbuf may or may not be used, so do not assume it contains the | |
909 | * returned path. | |
910 | */ | |
911 | const char *relative_path(const char *in, const char *prefix, | |
912 | struct strbuf *sb) | |
044bbbcb | 913 | { |
e02ca72f JX |
914 | int in_len = in ? strlen(in) : 0; |
915 | int prefix_len = prefix ? strlen(prefix) : 0; | |
916 | int in_off = 0; | |
917 | int prefix_off = 0; | |
288123f0 JH |
918 | int i = 0, j = 0; |
919 | ||
e02ca72f JX |
920 | if (!in_len) |
921 | return "./"; | |
922 | else if (!prefix_len) | |
923 | return in; | |
924 | ||
2f36eed9 | 925 | if (have_same_root(in, prefix)) |
7fbd4221 | 926 | /* bypass dos_drive, for "c:" is identical to "C:" */ |
2f36eed9 JS |
927 | i = j = has_dos_drive_prefix(in); |
928 | else { | |
7fbd4221 JX |
929 | return in; |
930 | } | |
931 | ||
e02ca72f JX |
932 | while (i < prefix_len && j < in_len && prefix[i] == in[j]) { |
933 | if (is_dir_sep(prefix[i])) { | |
934 | while (is_dir_sep(prefix[i])) | |
288123f0 | 935 | i++; |
e02ca72f JX |
936 | while (is_dir_sep(in[j])) |
937 | j++; | |
938 | prefix_off = i; | |
939 | in_off = j; | |
940 | } else { | |
941 | i++; | |
942 | j++; | |
943 | } | |
944 | } | |
945 | ||
946 | if ( | |
947 | /* "prefix" seems like prefix of "in" */ | |
948 | i >= prefix_len && | |
949 | /* | |
950 | * but "/foo" is not a prefix of "/foobar" | |
951 | * (i.e. prefix not end with '/') | |
952 | */ | |
953 | prefix_off < prefix_len) { | |
954 | if (j >= in_len) { | |
955 | /* in="/a/b", prefix="/a/b" */ | |
956 | in_off = in_len; | |
957 | } else if (is_dir_sep(in[j])) { | |
958 | /* in="/a/b/c", prefix="/a/b" */ | |
959 | while (is_dir_sep(in[j])) | |
288123f0 | 960 | j++; |
e02ca72f JX |
961 | in_off = j; |
962 | } else { | |
963 | /* in="/a/bbb/c", prefix="/a/b" */ | |
964 | i = prefix_off; | |
965 | } | |
966 | } else if ( | |
967 | /* "in" is short than "prefix" */ | |
968 | j >= in_len && | |
969 | /* "in" not end with '/' */ | |
970 | in_off < in_len) { | |
971 | if (is_dir_sep(prefix[i])) { | |
972 | /* in="/a/b", prefix="/a/b/c/" */ | |
973 | while (is_dir_sep(prefix[i])) | |
974 | i++; | |
975 | in_off = in_len; | |
976 | } | |
977 | } | |
978 | in += in_off; | |
979 | in_len -= in_off; | |
980 | ||
981 | if (i >= prefix_len) { | |
982 | if (!in_len) | |
983 | return "./"; | |
984 | else | |
985 | return in; | |
986 | } | |
987 | ||
988 | strbuf_reset(sb); | |
989 | strbuf_grow(sb, in_len); | |
990 | ||
991 | while (i < prefix_len) { | |
992 | if (is_dir_sep(prefix[i])) { | |
993 | strbuf_addstr(sb, "../"); | |
994 | while (is_dir_sep(prefix[i])) | |
995 | i++; | |
288123f0 | 996 | continue; |
288123f0 JH |
997 | } |
998 | i++; | |
288123f0 | 999 | } |
e02ca72f JX |
1000 | if (!is_dir_sep(prefix[prefix_len - 1])) |
1001 | strbuf_addstr(sb, "../"); | |
1002 | ||
1003 | strbuf_addstr(sb, in); | |
1004 | ||
1005 | return sb->buf; | |
044bbbcb | 1006 | } |
ae299be0 | 1007 | |
41894ae3 JX |
1008 | /* |
1009 | * A simpler implementation of relative_path | |
1010 | * | |
1011 | * Get relative path by removing "prefix" from "in". This function | |
1012 | * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter | |
1013 | * to increase performance when traversing the path to work_tree. | |
1014 | */ | |
1015 | const char *remove_leading_path(const char *in, const char *prefix) | |
1016 | { | |
46357688 | 1017 | static struct strbuf buf = STRBUF_INIT; |
41894ae3 JX |
1018 | int i = 0, j = 0; |
1019 | ||
1020 | if (!prefix || !prefix[0]) | |
1021 | return in; | |
1022 | while (prefix[i]) { | |
1023 | if (is_dir_sep(prefix[i])) { | |
1024 | if (!is_dir_sep(in[j])) | |
1025 | return in; | |
1026 | while (is_dir_sep(prefix[i])) | |
1027 | i++; | |
1028 | while (is_dir_sep(in[j])) | |
1029 | j++; | |
1030 | continue; | |
1031 | } else if (in[j] != prefix[i]) { | |
1032 | return in; | |
1033 | } | |
1034 | i++; | |
1035 | j++; | |
1036 | } | |
1037 | if ( | |
1038 | /* "/foo" is a prefix of "/foo" */ | |
1039 | in[j] && | |
1040 | /* "/foo" is not a prefix of "/foobar" */ | |
1041 | !is_dir_sep(prefix[i-1]) && !is_dir_sep(in[j]) | |
1042 | ) | |
1043 | return in; | |
1044 | while (is_dir_sep(in[j])) | |
1045 | j++; | |
46357688 JK |
1046 | |
1047 | strbuf_reset(&buf); | |
41894ae3 | 1048 | if (!in[j]) |
46357688 | 1049 | strbuf_addstr(&buf, "."); |
41894ae3 | 1050 | else |
46357688 JK |
1051 | strbuf_addstr(&buf, in + j); |
1052 | return buf.buf; | |
41894ae3 JX |
1053 | } |
1054 | ||
ae299be0 | 1055 | /* |
f2a782b8 | 1056 | * It is okay if dst == src, but they should not overlap otherwise. |
ae299be0 | 1057 | * |
f2a782b8 JS |
1058 | * Performs the following normalizations on src, storing the result in dst: |
1059 | * - Ensures that components are separated by '/' (Windows only) | |
7814fbe3 | 1060 | * - Squashes sequences of '/' except "//server/share" on Windows |
ae299be0 DR |
1061 | * - Removes "." components. |
1062 | * - Removes ".." components, and the components the precede them. | |
f2a782b8 JS |
1063 | * Returns failure (non-zero) if a ".." component appears as first path |
1064 | * component anytime during the normalization. Otherwise, returns success (0). | |
ae299be0 DR |
1065 | * |
1066 | * Note that this function is purely textual. It does not follow symlinks, | |
1067 | * verify the existence of the path, or make any system calls. | |
645a29c4 NTND |
1068 | * |
1069 | * prefix_len != NULL is for a specific case of prefix_pathspec(): | |
1070 | * assume that src == dst and src[0..prefix_len-1] is already | |
1071 | * normalized, any time "../" eats up to the prefix_len part, | |
1072 | * prefix_len is reduced. In the end prefix_len is the remaining | |
1073 | * prefix that has not been overridden by user pathspec. | |
b2a7123b RD |
1074 | * |
1075 | * NEEDSWORK: This function doesn't perform normalization w.r.t. trailing '/'. | |
1076 | * For everything but the root folder itself, the normalized path should not | |
1077 | * end with a '/', then the callers need to be fixed up accordingly. | |
1078 | * | |
ae299be0 | 1079 | */ |
645a29c4 | 1080 | int normalize_path_copy_len(char *dst, const char *src, int *prefix_len) |
ae299be0 | 1081 | { |
f3cad0ad | 1082 | char *dst0; |
7814fbe3 | 1083 | const char *end; |
ae299be0 | 1084 | |
7814fbe3 JS |
1085 | /* |
1086 | * Copy initial part of absolute path: "/", "C:/", "//server/share/". | |
1087 | */ | |
1088 | end = src + offset_1st_component(src); | |
1089 | while (src < end) { | |
1090 | char c = *src++; | |
1091 | if (is_dir_sep(c)) | |
1092 | c = '/'; | |
1093 | *dst++ = c; | |
1094 | } | |
f3cad0ad | 1095 | dst0 = dst; |
ae299be0 | 1096 | |
7814fbe3 JS |
1097 | while (is_dir_sep(*src)) |
1098 | src++; | |
f3cad0ad JS |
1099 | |
1100 | for (;;) { | |
1101 | char c = *src; | |
1102 | ||
1103 | /* | |
1104 | * A path component that begins with . could be | |
1105 | * special: | |
1106 | * (1) "." and ends -- ignore and terminate. | |
1107 | * (2) "./" -- ignore them, eat slash and continue. | |
1108 | * (3) ".." and ends -- strip one and terminate. | |
1109 | * (4) "../" -- strip one, eat slash and continue. | |
1110 | */ | |
1111 | if (c == '.') { | |
1112 | if (!src[1]) { | |
1113 | /* (1) */ | |
1114 | src++; | |
1115 | } else if (is_dir_sep(src[1])) { | |
1116 | /* (2) */ | |
1117 | src += 2; | |
1118 | while (is_dir_sep(*src)) | |
1119 | src++; | |
1120 | continue; | |
1121 | } else if (src[1] == '.') { | |
1122 | if (!src[2]) { | |
1123 | /* (3) */ | |
1124 | src += 2; | |
1125 | goto up_one; | |
1126 | } else if (is_dir_sep(src[2])) { | |
1127 | /* (4) */ | |
1128 | src += 3; | |
1129 | while (is_dir_sep(*src)) | |
1130 | src++; | |
1131 | goto up_one; | |
1132 | } | |
1133 | } | |
1134 | } | |
ae299be0 | 1135 | |
f3cad0ad JS |
1136 | /* copy up to the next '/', and eat all '/' */ |
1137 | while ((c = *src++) != '\0' && !is_dir_sep(c)) | |
1138 | *dst++ = c; | |
1139 | if (is_dir_sep(c)) { | |
1140 | *dst++ = '/'; | |
1141 | while (is_dir_sep(c)) | |
1142 | c = *src++; | |
1143 | src--; | |
1144 | } else if (!c) | |
1145 | break; | |
1146 | continue; | |
1147 | ||
1148 | up_one: | |
1149 | /* | |
1150 | * dst0..dst is prefix portion, and dst[-1] is '/'; | |
1151 | * go up one level. | |
1152 | */ | |
f42302b4 JS |
1153 | dst--; /* go to trailing '/' */ |
1154 | if (dst <= dst0) | |
f3cad0ad | 1155 | return -1; |
f42302b4 JS |
1156 | /* Windows: dst[-1] cannot be backslash anymore */ |
1157 | while (dst0 < dst && dst[-1] != '/') | |
1158 | dst--; | |
645a29c4 NTND |
1159 | if (prefix_len && *prefix_len > dst - dst0) |
1160 | *prefix_len = dst - dst0; | |
f3cad0ad | 1161 | } |
ae299be0 | 1162 | *dst = '\0'; |
f3cad0ad | 1163 | return 0; |
ae299be0 | 1164 | } |
0454dd93 | 1165 | |
645a29c4 NTND |
1166 | int normalize_path_copy(char *dst, const char *src) |
1167 | { | |
1168 | return normalize_path_copy_len(dst, src, NULL); | |
1169 | } | |
1170 | ||
0454dd93 DR |
1171 | /* |
1172 | * path = Canonical absolute path | |
9e2326c7 MH |
1173 | * prefixes = string_list containing normalized, absolute paths without |
1174 | * trailing slashes (except for the root directory, which is denoted by "/"). | |
0454dd93 | 1175 | * |
9e2326c7 | 1176 | * Determines, for each path in prefixes, whether the "prefix" |
0454dd93 DR |
1177 | * is an ancestor directory of path. Returns the length of the longest |
1178 | * ancestor directory, excluding any trailing slashes, or -1 if no prefix | |
31171d9e MH |
1179 | * is an ancestor. (Note that this means 0 is returned if prefixes is |
1180 | * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories | |
0454dd93 DR |
1181 | * are not considered to be their own ancestors. path must be in a |
1182 | * canonical form: empty components, or "." or ".." components are not | |
9e2326c7 | 1183 | * allowed. |
0454dd93 | 1184 | */ |
31171d9e | 1185 | int longest_ancestor_length(const char *path, struct string_list *prefixes) |
0454dd93 | 1186 | { |
a5ccdbe4 | 1187 | int i, max_len = -1; |
0454dd93 | 1188 | |
31171d9e | 1189 | if (!strcmp(path, "/")) |
0454dd93 DR |
1190 | return -1; |
1191 | ||
31171d9e MH |
1192 | for (i = 0; i < prefixes->nr; i++) { |
1193 | const char *ceil = prefixes->items[i].string; | |
a5ccdbe4 MH |
1194 | int len = strlen(ceil); |
1195 | ||
9e2326c7 MH |
1196 | if (len == 1 && ceil[0] == '/') |
1197 | len = 0; /* root matches anything, with length 0 */ | |
1198 | else if (!strncmp(path, ceil, len) && path[len] == '/') | |
1199 | ; /* match of length len */ | |
1200 | else | |
1201 | continue; /* no match */ | |
0454dd93 | 1202 | |
9e2326c7 | 1203 | if (len > max_len) |
0454dd93 | 1204 | max_len = len; |
0454dd93 DR |
1205 | } |
1206 | ||
1207 | return max_len; | |
1208 | } | |
4fcc86b0 JS |
1209 | |
1210 | /* strip arbitrary amount of directory separators at end of path */ | |
1211 | static inline int chomp_trailing_dir_sep(const char *path, int len) | |
1212 | { | |
1213 | while (len && is_dir_sep(path[len - 1])) | |
1214 | len--; | |
1215 | return len; | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * If path ends with suffix (complete path components), returns the | |
1220 | * part before suffix (sans trailing directory separators). | |
1221 | * Otherwise returns NULL. | |
1222 | */ | |
1223 | char *strip_path_suffix(const char *path, const char *suffix) | |
1224 | { | |
1225 | int path_len = strlen(path), suffix_len = strlen(suffix); | |
1226 | ||
1227 | while (suffix_len) { | |
1228 | if (!path_len) | |
1229 | return NULL; | |
1230 | ||
1231 | if (is_dir_sep(path[path_len - 1])) { | |
1232 | if (!is_dir_sep(suffix[suffix_len - 1])) | |
1233 | return NULL; | |
1234 | path_len = chomp_trailing_dir_sep(path, path_len); | |
1235 | suffix_len = chomp_trailing_dir_sep(suffix, suffix_len); | |
1236 | } | |
1237 | else if (path[--path_len] != suffix[--suffix_len]) | |
1238 | return NULL; | |
1239 | } | |
1240 | ||
1241 | if (path_len && !is_dir_sep(path[path_len - 1])) | |
1242 | return NULL; | |
1243 | return xstrndup(path, chomp_trailing_dir_sep(path, path_len)); | |
1244 | } | |
34b6cb8b SP |
1245 | |
1246 | int daemon_avoid_alias(const char *p) | |
1247 | { | |
1248 | int sl, ndot; | |
1249 | ||
1250 | /* | |
1251 | * This resurrects the belts and suspenders paranoia check by HPA | |
1252 | * done in <435560F7.4080006@zytor.com> thread, now enter_repo() | |
9517e6b8 | 1253 | * does not do getcwd() based path canonicalization. |
34b6cb8b SP |
1254 | * |
1255 | * sl becomes true immediately after seeing '/' and continues to | |
1256 | * be true as long as dots continue after that without intervening | |
1257 | * non-dot character. | |
1258 | */ | |
1259 | if (!p || (*p != '/' && *p != '~')) | |
1260 | return -1; | |
1261 | sl = 1; ndot = 0; | |
1262 | p++; | |
1263 | ||
1264 | while (1) { | |
1265 | char ch = *p++; | |
1266 | if (sl) { | |
1267 | if (ch == '.') | |
1268 | ndot++; | |
1269 | else if (ch == '/') { | |
1270 | if (ndot < 3) | |
1271 | /* reject //, /./ and /../ */ | |
1272 | return -1; | |
1273 | ndot = 0; | |
1274 | } | |
1275 | else if (ch == 0) { | |
1276 | if (0 < ndot && ndot < 3) | |
1277 | /* reject /.$ and /..$ */ | |
1278 | return -1; | |
1279 | return 0; | |
1280 | } | |
1281 | else | |
1282 | sl = ndot = 0; | |
1283 | } | |
1284 | else if (ch == 0) | |
1285 | return 0; | |
1286 | else if (ch == '/') { | |
1287 | sl = 1; | |
1288 | ndot = 0; | |
1289 | } | |
1290 | } | |
1291 | } | |
4bb43de2 | 1292 | |
1d1d69bc JS |
1293 | static int only_spaces_and_periods(const char *path, size_t len, size_t skip) |
1294 | { | |
1295 | if (len < skip) | |
1296 | return 0; | |
1297 | len -= skip; | |
1298 | path += skip; | |
1299 | while (len-- > 0) { | |
1300 | char c = *(path++); | |
1301 | if (c != ' ' && c != '.') | |
1302 | return 0; | |
1303 | } | |
1304 | return 1; | |
1305 | } | |
1306 | ||
1307 | int is_ntfs_dotgit(const char *name) | |
1308 | { | |
11a9f4d8 | 1309 | size_t len; |
1d1d69bc JS |
1310 | |
1311 | for (len = 0; ; len++) | |
1312 | if (!name[len] || name[len] == '\\' || is_dir_sep(name[len])) { | |
1313 | if (only_spaces_and_periods(name, len, 4) && | |
1314 | !strncasecmp(name, ".git", 4)) | |
1315 | return 1; | |
1316 | if (only_spaces_and_periods(name, len, 5) && | |
1317 | !strncasecmp(name, "git~1", 5)) | |
1318 | return 1; | |
1319 | if (name[len] != '\\') | |
1320 | return 0; | |
1321 | name += len + 1; | |
1322 | len = -1; | |
1323 | } | |
1324 | } | |
ea19289b | 1325 | |
e7cb0b44 JS |
1326 | static int is_ntfs_dot_generic(const char *name, |
1327 | const char *dotgit_name, | |
1328 | size_t len, | |
1329 | const char *dotgit_ntfs_shortname_prefix) | |
1330 | { | |
1331 | int saw_tilde; | |
1332 | size_t i; | |
1333 | ||
1334 | if ((name[0] == '.' && !strncasecmp(name + 1, dotgit_name, len))) { | |
1335 | i = len + 1; | |
1336 | only_spaces_and_periods: | |
1337 | for (;;) { | |
1338 | char c = name[i++]; | |
1339 | if (!c) | |
1340 | return 1; | |
1341 | if (c != ' ' && c != '.') | |
1342 | return 0; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * Is it a regular NTFS short name, i.e. shortened to 6 characters, | |
1348 | * followed by ~1, ... ~4? | |
1349 | */ | |
1350 | if (!strncasecmp(name, dotgit_name, 6) && name[6] == '~' && | |
1351 | name[7] >= '1' && name[7] <= '4') { | |
1352 | i = 8; | |
1353 | goto only_spaces_and_periods; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * Is it a fall-back NTFS short name (for details, see | |
1358 | * https://en.wikipedia.org/wiki/8.3_filename? | |
1359 | */ | |
1360 | for (i = 0, saw_tilde = 0; i < 8; i++) | |
1361 | if (name[i] == '\0') | |
1362 | return 0; | |
1363 | else if (saw_tilde) { | |
1364 | if (name[i] < '0' || name[i] > '9') | |
1365 | return 0; | |
1366 | } else if (name[i] == '~') { | |
1367 | if (name[++i] < '1' || name[i] > '9') | |
1368 | return 0; | |
1369 | saw_tilde = 1; | |
1370 | } else if (i >= 6) | |
1371 | return 0; | |
1372 | else if (name[i] < 0) { | |
1373 | /* | |
1374 | * We know our needles contain only ASCII, so we clamp | |
1375 | * here to make the results of tolower() sane. | |
1376 | */ | |
1377 | return 0; | |
1378 | } else if (tolower(name[i]) != dotgit_ntfs_shortname_prefix[i]) | |
1379 | return 0; | |
1380 | ||
1381 | goto only_spaces_and_periods; | |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * Inline helper to make sure compiler resolves strlen() on literals at | |
1386 | * compile time. | |
1387 | */ | |
1388 | static inline int is_ntfs_dot_str(const char *name, const char *dotgit_name, | |
1389 | const char *dotgit_ntfs_shortname_prefix) | |
1390 | { | |
1391 | return is_ntfs_dot_generic(name, dotgit_name, strlen(dotgit_name), | |
1392 | dotgit_ntfs_shortname_prefix); | |
1393 | } | |
1394 | ||
1395 | int is_ntfs_dotgitmodules(const char *name) | |
1396 | { | |
1397 | return is_ntfs_dot_str(name, "gitmodules", "gi7eba"); | |
1398 | } | |
1399 | ||
1400 | int is_ntfs_dotgitignore(const char *name) | |
1401 | { | |
1402 | return is_ntfs_dot_str(name, "gitignore", "gi250a"); | |
1403 | } | |
1404 | ||
1405 | int is_ntfs_dotgitattributes(const char *name) | |
1406 | { | |
1407 | return is_ntfs_dot_str(name, "gitattributes", "gi7d29"); | |
1408 | } | |
1409 | ||
2491f77b JK |
1410 | int looks_like_command_line_option(const char *str) |
1411 | { | |
1412 | return str && str[0] == '-'; | |
1413 | } | |
1414 | ||
ea19289b PT |
1415 | char *xdg_config_home(const char *filename) |
1416 | { | |
1417 | const char *home, *config_home; | |
1418 | ||
1419 | assert(filename); | |
1420 | config_home = getenv("XDG_CONFIG_HOME"); | |
1421 | if (config_home && *config_home) | |
1422 | return mkpathdup("%s/git/%s", config_home, filename); | |
1423 | ||
1424 | home = getenv("HOME"); | |
1425 | if (home) | |
1426 | return mkpathdup("%s/.config/git/%s", home, filename); | |
1427 | return NULL; | |
1428 | } | |
f932729c | 1429 | |
e7f136bf DL |
1430 | char *xdg_cache_home(const char *filename) |
1431 | { | |
1432 | const char *home, *cache_home; | |
1433 | ||
1434 | assert(filename); | |
1435 | cache_home = getenv("XDG_CACHE_HOME"); | |
1436 | if (cache_home && *cache_home) | |
1437 | return mkpathdup("%s/git/%s", cache_home, filename); | |
1438 | ||
1439 | home = getenv("HOME"); | |
1440 | if (home) | |
1441 | return mkpathdup("%s/.cache/git/%s", home, filename); | |
1442 | return NULL; | |
1443 | } | |
1444 | ||
102de880 SB |
1445 | REPO_GIT_PATH_FUNC(cherry_pick_head, "CHERRY_PICK_HEAD") |
1446 | REPO_GIT_PATH_FUNC(revert_head, "REVERT_HEAD") | |
1447 | REPO_GIT_PATH_FUNC(squash_msg, "SQUASH_MSG") | |
1448 | REPO_GIT_PATH_FUNC(merge_msg, "MERGE_MSG") | |
1449 | REPO_GIT_PATH_FUNC(merge_rr, "MERGE_RR") | |
1450 | REPO_GIT_PATH_FUNC(merge_mode, "MERGE_MODE") | |
1451 | REPO_GIT_PATH_FUNC(merge_head, "MERGE_HEAD") | |
1452 | REPO_GIT_PATH_FUNC(fetch_head, "FETCH_HEAD") | |
1453 | REPO_GIT_PATH_FUNC(shallow, "shallow") |