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Commit | Line | Data |
---|---|---|
26c8a533 | 1 | /* |
3a429d3b | 2 | * Utilities for paths and pathnames |
26c8a533 LT |
3 | */ |
4 | #include "cache.h" | |
395de250 | 5 | #include "strbuf.h" |
a5ccdbe4 | 6 | #include "string-list.h" |
77a6d840 | 7 | #include "dir.h" |
2e641d58 | 8 | #include "worktree.h" |
99b43a61 | 9 | #include "submodule-config.h" |
26c8a533 | 10 | |
f66450ae | 11 | static int get_st_mode_bits(const char *path, int *mode) |
0117c2f0 TB |
12 | { |
13 | struct stat st; | |
14 | if (lstat(path, &st) < 0) | |
15 | return -1; | |
16 | *mode = st.st_mode; | |
17 | return 0; | |
18 | } | |
0117c2f0 | 19 | |
26c8a533 LT |
20 | static char bad_path[] = "/bad-path/"; |
21 | ||
4ef9caf5 | 22 | static struct strbuf *get_pathname(void) |
e7676d2f | 23 | { |
4ef9caf5 NTND |
24 | static struct strbuf pathname_array[4] = { |
25 | STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT | |
26 | }; | |
e7676d2f | 27 | static int index; |
bb84735c RS |
28 | struct strbuf *sb = &pathname_array[index]; |
29 | index = (index + 1) % ARRAY_SIZE(pathname_array); | |
4ef9caf5 NTND |
30 | strbuf_reset(sb); |
31 | return sb; | |
e7676d2f LT |
32 | } |
33 | ||
26c8a533 LT |
34 | static char *cleanup_path(char *path) |
35 | { | |
36 | /* Clean it up */ | |
37 | if (!memcmp(path, "./", 2)) { | |
38 | path += 2; | |
39 | while (*path == '/') | |
40 | path++; | |
41 | } | |
42 | return path; | |
43 | } | |
44 | ||
4ef9caf5 NTND |
45 | static void strbuf_cleanup_path(struct strbuf *sb) |
46 | { | |
47 | char *path = cleanup_path(sb->buf); | |
48 | if (path > sb->buf) | |
49 | strbuf_remove(sb, 0, path - sb->buf); | |
50 | } | |
51 | ||
108bebea AR |
52 | char *mksnpath(char *buf, size_t n, const char *fmt, ...) |
53 | { | |
54 | va_list args; | |
55 | unsigned len; | |
56 | ||
57 | va_start(args, fmt); | |
58 | len = vsnprintf(buf, n, fmt, args); | |
59 | va_end(args); | |
60 | if (len >= n) { | |
9db56f71 | 61 | strlcpy(buf, bad_path, n); |
108bebea AR |
62 | return buf; |
63 | } | |
64 | return cleanup_path(buf); | |
65 | } | |
66 | ||
557bd833 | 67 | static int dir_prefix(const char *buf, const char *dir) |
fe2d7776 | 68 | { |
557bd833 NTND |
69 | int len = strlen(dir); |
70 | return !strncmp(buf, dir, len) && | |
71 | (is_dir_sep(buf[len]) || buf[len] == '\0'); | |
72 | } | |
fe2d7776 | 73 | |
557bd833 NTND |
74 | /* $buf =~ m|$dir/+$file| but without regex */ |
75 | static int is_dir_file(const char *buf, const char *dir, const char *file) | |
76 | { | |
77 | int len = strlen(dir); | |
78 | if (strncmp(buf, dir, len) || !is_dir_sep(buf[len])) | |
79 | return 0; | |
80 | while (is_dir_sep(buf[len])) | |
81 | len++; | |
82 | return !strcmp(buf + len, file); | |
83 | } | |
84 | ||
85 | static void replace_dir(struct strbuf *buf, int len, const char *newdir) | |
86 | { | |
87 | int newlen = strlen(newdir); | |
88 | int need_sep = (buf->buf[len] && !is_dir_sep(buf->buf[len])) && | |
89 | !is_dir_sep(newdir[newlen - 1]); | |
90 | if (need_sep) | |
91 | len--; /* keep one char, to be replaced with '/' */ | |
92 | strbuf_splice(buf, 0, len, newdir, newlen); | |
93 | if (need_sep) | |
94 | buf->buf[newlen] = '/'; | |
95 | } | |
96 | ||
0701530c DT |
97 | struct common_dir { |
98 | /* Not considered garbage for report_linked_checkout_garbage */ | |
99 | unsigned ignore_garbage:1; | |
100 | unsigned is_dir:1; | |
101 | /* Not common even though its parent is */ | |
102 | unsigned exclude:1; | |
103 | const char *dirname; | |
104 | }; | |
105 | ||
106 | static struct common_dir common_list[] = { | |
107 | { 0, 1, 0, "branches" }, | |
108 | { 0, 1, 0, "hooks" }, | |
109 | { 0, 1, 0, "info" }, | |
110 | { 0, 0, 1, "info/sparse-checkout" }, | |
111 | { 1, 1, 0, "logs" }, | |
112 | { 1, 1, 1, "logs/HEAD" }, | |
ce414b33 | 113 | { 0, 1, 1, "logs/refs/bisect" }, |
0701530c DT |
114 | { 0, 1, 0, "lost-found" }, |
115 | { 0, 1, 0, "objects" }, | |
116 | { 0, 1, 0, "refs" }, | |
ce414b33 | 117 | { 0, 1, 1, "refs/bisect" }, |
0701530c DT |
118 | { 0, 1, 0, "remotes" }, |
119 | { 0, 1, 0, "worktrees" }, | |
120 | { 0, 1, 0, "rr-cache" }, | |
121 | { 0, 1, 0, "svn" }, | |
122 | { 0, 0, 0, "config" }, | |
123 | { 1, 0, 0, "gc.pid" }, | |
124 | { 0, 0, 0, "packed-refs" }, | |
125 | { 0, 0, 0, "shallow" }, | |
126 | { 0, 0, 0, NULL } | |
c7b3a3d2 NTND |
127 | }; |
128 | ||
4e09cf2a DT |
129 | /* |
130 | * A compressed trie. A trie node consists of zero or more characters that | |
131 | * are common to all elements with this prefix, optionally followed by some | |
132 | * children. If value is not NULL, the trie node is a terminal node. | |
133 | * | |
134 | * For example, consider the following set of strings: | |
135 | * abc | |
136 | * def | |
137 | * definite | |
138 | * definition | |
139 | * | |
832c0e5e | 140 | * The trie would look like: |
4e09cf2a DT |
141 | * root: len = 0, children a and d non-NULL, value = NULL. |
142 | * a: len = 2, contents = bc, value = (data for "abc") | |
143 | * d: len = 2, contents = ef, children i non-NULL, value = (data for "def") | |
144 | * i: len = 3, contents = nit, children e and i non-NULL, value = NULL | |
145 | * e: len = 0, children all NULL, value = (data for "definite") | |
146 | * i: len = 2, contents = on, children all NULL, | |
147 | * value = (data for "definition") | |
148 | */ | |
149 | struct trie { | |
150 | struct trie *children[256]; | |
151 | int len; | |
152 | char *contents; | |
153 | void *value; | |
154 | }; | |
155 | ||
156 | static struct trie *make_trie_node(const char *key, void *value) | |
c7b3a3d2 | 157 | { |
4e09cf2a DT |
158 | struct trie *new_node = xcalloc(1, sizeof(*new_node)); |
159 | new_node->len = strlen(key); | |
160 | if (new_node->len) { | |
161 | new_node->contents = xmalloc(new_node->len); | |
162 | memcpy(new_node->contents, key, new_node->len); | |
163 | } | |
164 | new_node->value = value; | |
165 | return new_node; | |
166 | } | |
c7b3a3d2 | 167 | |
4e09cf2a DT |
168 | /* |
169 | * Add a key/value pair to a trie. The key is assumed to be \0-terminated. | |
170 | * If there was an existing value for this key, return it. | |
171 | */ | |
172 | static void *add_to_trie(struct trie *root, const char *key, void *value) | |
173 | { | |
174 | struct trie *child; | |
175 | void *old; | |
176 | int i; | |
177 | ||
178 | if (!*key) { | |
179 | /* we have reached the end of the key */ | |
180 | old = root->value; | |
181 | root->value = value; | |
182 | return old; | |
183 | } | |
184 | ||
185 | for (i = 0; i < root->len; i++) { | |
186 | if (root->contents[i] == key[i]) | |
187 | continue; | |
188 | ||
189 | /* | |
190 | * Split this node: child will contain this node's | |
191 | * existing children. | |
192 | */ | |
193 | child = malloc(sizeof(*child)); | |
194 | memcpy(child->children, root->children, sizeof(root->children)); | |
195 | ||
196 | child->len = root->len - i - 1; | |
197 | if (child->len) { | |
198 | child->contents = xstrndup(root->contents + i + 1, | |
199 | child->len); | |
c7b3a3d2 | 200 | } |
4e09cf2a DT |
201 | child->value = root->value; |
202 | root->value = NULL; | |
203 | root->len = i; | |
204 | ||
205 | memset(root->children, 0, sizeof(root->children)); | |
206 | root->children[(unsigned char)root->contents[i]] = child; | |
207 | ||
208 | /* This is the newly-added child. */ | |
209 | root->children[(unsigned char)key[i]] = | |
210 | make_trie_node(key + i + 1, value); | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | /* We have matched the entire compressed section */ | |
215 | if (key[i]) { | |
216 | child = root->children[(unsigned char)key[root->len]]; | |
217 | if (child) { | |
218 | return add_to_trie(child, key + root->len + 1, value); | |
219 | } else { | |
220 | child = make_trie_node(key + root->len + 1, value); | |
221 | root->children[(unsigned char)key[root->len]] = child; | |
222 | return NULL; | |
c7b3a3d2 NTND |
223 | } |
224 | } | |
4e09cf2a DT |
225 | |
226 | old = root->value; | |
227 | root->value = value; | |
228 | return old; | |
229 | } | |
230 | ||
231 | typedef int (*match_fn)(const char *unmatched, void *data, void *baton); | |
232 | ||
233 | /* | |
234 | * Search a trie for some key. Find the longest /-or-\0-terminated | |
235 | * prefix of the key for which the trie contains a value. Call fn | |
236 | * with the unmatched portion of the key and the found value, and | |
237 | * return its return value. If there is no such prefix, return -1. | |
238 | * | |
239 | * The key is partially normalized: consecutive slashes are skipped. | |
240 | * | |
241 | * For example, consider the trie containing only [refs, | |
242 | * refs/worktree] (both with values). | |
243 | * | |
244 | * | key | unmatched | val from node | return value | | |
245 | * |-----------------|------------|---------------|--------------| | |
246 | * | a | not called | n/a | -1 | | |
247 | * | refs | \0 | refs | as per fn | | |
248 | * | refs/ | / | refs | as per fn | | |
249 | * | refs/w | /w | refs | as per fn | | |
250 | * | refs/worktree | \0 | refs/worktree | as per fn | | |
251 | * | refs/worktree/ | / | refs/worktree | as per fn | | |
252 | * | refs/worktree/a | /a | refs/worktree | as per fn | | |
253 | * |-----------------|------------|---------------|--------------| | |
254 | * | |
255 | */ | |
256 | static int trie_find(struct trie *root, const char *key, match_fn fn, | |
257 | void *baton) | |
258 | { | |
259 | int i; | |
260 | int result; | |
261 | struct trie *child; | |
262 | ||
263 | if (!*key) { | |
264 | /* we have reached the end of the key */ | |
265 | if (root->value && !root->len) | |
266 | return fn(key, root->value, baton); | |
267 | else | |
268 | return -1; | |
269 | } | |
270 | ||
271 | for (i = 0; i < root->len; i++) { | |
272 | /* Partial path normalization: skip consecutive slashes. */ | |
273 | if (key[i] == '/' && key[i+1] == '/') { | |
274 | key++; | |
275 | continue; | |
276 | } | |
277 | if (root->contents[i] != key[i]) | |
278 | return -1; | |
279 | } | |
280 | ||
281 | /* Matched the entire compressed section */ | |
282 | key += i; | |
283 | if (!*key) | |
284 | /* End of key */ | |
285 | return fn(key, root->value, baton); | |
286 | ||
287 | /* Partial path normalization: skip consecutive slashes */ | |
288 | while (key[0] == '/' && key[1] == '/') | |
289 | key++; | |
290 | ||
291 | child = root->children[(unsigned char)*key]; | |
292 | if (child) | |
293 | result = trie_find(child, key + 1, fn, baton); | |
294 | else | |
295 | result = -1; | |
296 | ||
297 | if (result >= 0 || (*key != '/' && *key != 0)) | |
298 | return result; | |
299 | if (root->value) | |
300 | return fn(key, root->value, baton); | |
301 | else | |
302 | return -1; | |
303 | } | |
304 | ||
305 | static struct trie common_trie; | |
306 | static int common_trie_done_setup; | |
307 | ||
308 | static void init_common_trie(void) | |
309 | { | |
310 | struct common_dir *p; | |
311 | ||
312 | if (common_trie_done_setup) | |
313 | return; | |
314 | ||
315 | for (p = common_list; p->dirname; p++) | |
316 | add_to_trie(&common_trie, p->dirname, p); | |
317 | ||
318 | common_trie_done_setup = 1; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Helper function for update_common_dir: returns 1 if the dir | |
323 | * prefix is common. | |
324 | */ | |
325 | static int check_common(const char *unmatched, void *value, void *baton) | |
326 | { | |
327 | struct common_dir *dir = value; | |
328 | ||
329 | if (!dir) | |
330 | return 0; | |
331 | ||
332 | if (dir->is_dir && (unmatched[0] == 0 || unmatched[0] == '/')) | |
333 | return !dir->exclude; | |
334 | ||
335 | if (!dir->is_dir && unmatched[0] == 0) | |
336 | return !dir->exclude; | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
1c630bad JH |
341 | static void update_common_dir(struct strbuf *buf, int git_dir_len, |
342 | const char *common_dir) | |
4e09cf2a DT |
343 | { |
344 | char *base = buf->buf + git_dir_len; | |
345 | init_common_trie(); | |
1c630bad JH |
346 | if (!common_dir) |
347 | common_dir = get_git_common_dir(); | |
4e09cf2a | 348 | if (trie_find(&common_trie, base, check_common, NULL) > 0) |
1c630bad | 349 | replace_dir(buf, git_dir_len, common_dir); |
c7b3a3d2 NTND |
350 | } |
351 | ||
77a6d840 NTND |
352 | void report_linked_checkout_garbage(void) |
353 | { | |
354 | struct strbuf sb = STRBUF_INIT; | |
0701530c | 355 | const struct common_dir *p; |
77a6d840 NTND |
356 | int len; |
357 | ||
358 | if (!git_common_dir_env) | |
359 | return; | |
360 | strbuf_addf(&sb, "%s/", get_git_dir()); | |
361 | len = sb.len; | |
0701530c DT |
362 | for (p = common_list; p->dirname; p++) { |
363 | const char *path = p->dirname; | |
364 | if (p->ignore_garbage) | |
77a6d840 NTND |
365 | continue; |
366 | strbuf_setlen(&sb, len); | |
367 | strbuf_addstr(&sb, path); | |
368 | if (file_exists(sb.buf)) | |
0a489b06 | 369 | report_garbage(PACKDIR_FILE_GARBAGE, sb.buf); |
77a6d840 NTND |
370 | } |
371 | strbuf_release(&sb); | |
fe2d7776 AR |
372 | } |
373 | ||
557bd833 NTND |
374 | static void adjust_git_path(struct strbuf *buf, int git_dir_len) |
375 | { | |
376 | const char *base = buf->buf + git_dir_len; | |
377 | if (git_graft_env && is_dir_file(base, "info", "grafts")) | |
378 | strbuf_splice(buf, 0, buf->len, | |
379 | get_graft_file(), strlen(get_graft_file())); | |
380 | else if (git_index_env && !strcmp(base, "index")) | |
381 | strbuf_splice(buf, 0, buf->len, | |
382 | get_index_file(), strlen(get_index_file())); | |
383 | else if (git_db_env && dir_prefix(base, "objects")) | |
384 | replace_dir(buf, git_dir_len + 7, get_object_directory()); | |
9445b492 JS |
385 | else if (git_hooks_path && dir_prefix(base, "hooks")) |
386 | replace_dir(buf, git_dir_len + 5, git_hooks_path); | |
c7b3a3d2 | 387 | else if (git_common_dir_env) |
11f9dd71 | 388 | update_common_dir(buf, git_dir_len, NULL); |
557bd833 NTND |
389 | } |
390 | ||
2e641d58 NTND |
391 | static void do_git_path(const struct worktree *wt, struct strbuf *buf, |
392 | const char *fmt, va_list args) | |
fe2d7776 | 393 | { |
557bd833 | 394 | int gitdir_len; |
2e641d58 | 395 | strbuf_addstr(buf, get_worktree_git_dir(wt)); |
4ef9caf5 NTND |
396 | if (buf->len && !is_dir_sep(buf->buf[buf->len - 1])) |
397 | strbuf_addch(buf, '/'); | |
557bd833 | 398 | gitdir_len = buf->len; |
4ef9caf5 | 399 | strbuf_vaddf(buf, fmt, args); |
557bd833 | 400 | adjust_git_path(buf, gitdir_len); |
4ef9caf5 | 401 | strbuf_cleanup_path(buf); |
fe2d7776 AR |
402 | } |
403 | ||
bb3788ce JK |
404 | char *git_path_buf(struct strbuf *buf, const char *fmt, ...) |
405 | { | |
406 | va_list args; | |
407 | strbuf_reset(buf); | |
408 | va_start(args, fmt); | |
2e641d58 | 409 | do_git_path(NULL, buf, fmt, args); |
bb3788ce JK |
410 | va_end(args); |
411 | return buf->buf; | |
412 | } | |
413 | ||
1a83c240 | 414 | void strbuf_git_path(struct strbuf *sb, const char *fmt, ...) |
aba13e7c AR |
415 | { |
416 | va_list args; | |
417 | va_start(args, fmt); | |
2e641d58 | 418 | do_git_path(NULL, sb, fmt, args); |
aba13e7c | 419 | va_end(args); |
aba13e7c AR |
420 | } |
421 | ||
57a23b77 | 422 | const char *git_path(const char *fmt, ...) |
aba13e7c | 423 | { |
57a23b77 | 424 | struct strbuf *pathname = get_pathname(); |
aba13e7c AR |
425 | va_list args; |
426 | va_start(args, fmt); | |
2e641d58 | 427 | do_git_path(NULL, pathname, fmt, args); |
aba13e7c | 428 | va_end(args); |
57a23b77 | 429 | return pathname->buf; |
aba13e7c AR |
430 | } |
431 | ||
aba13e7c | 432 | char *git_pathdup(const char *fmt, ...) |
21cf3227 | 433 | { |
4ef9caf5 | 434 | struct strbuf path = STRBUF_INIT; |
21cf3227 | 435 | va_list args; |
21cf3227 | 436 | va_start(args, fmt); |
2e641d58 | 437 | do_git_path(NULL, &path, fmt, args); |
21cf3227 | 438 | va_end(args); |
4ef9caf5 | 439 | return strbuf_detach(&path, NULL); |
21cf3227 HKNN |
440 | } |
441 | ||
21cf3227 | 442 | char *mkpathdup(const char *fmt, ...) |
26c8a533 | 443 | { |
21cf3227 | 444 | struct strbuf sb = STRBUF_INIT; |
26c8a533 | 445 | va_list args; |
26c8a533 | 446 | va_start(args, fmt); |
21cf3227 | 447 | strbuf_vaddf(&sb, fmt, args); |
26c8a533 | 448 | va_end(args); |
4ef9caf5 NTND |
449 | strbuf_cleanup_path(&sb); |
450 | return strbuf_detach(&sb, NULL); | |
26c8a533 LT |
451 | } |
452 | ||
dcf69262 | 453 | const char *mkpath(const char *fmt, ...) |
26c8a533 | 454 | { |
26c8a533 | 455 | va_list args; |
4ef9caf5 | 456 | struct strbuf *pathname = get_pathname(); |
26c8a533 | 457 | va_start(args, fmt); |
4ef9caf5 | 458 | strbuf_vaddf(pathname, fmt, args); |
26c8a533 | 459 | va_end(args); |
4ef9caf5 | 460 | return cleanup_path(pathname->buf); |
26c8a533 | 461 | } |
f2db68ed | 462 | |
2e641d58 NTND |
463 | const char *worktree_git_path(const struct worktree *wt, const char *fmt, ...) |
464 | { | |
465 | struct strbuf *pathname = get_pathname(); | |
466 | va_list args; | |
467 | va_start(args, fmt); | |
468 | do_git_path(wt, pathname, fmt, args); | |
469 | va_end(args); | |
470 | return pathname->buf; | |
471 | } | |
472 | ||
99b43a61 JK |
473 | /* Returns 0 on success, negative on failure. */ |
474 | #define SUBMODULE_PATH_ERR_NOT_CONFIGURED -1 | |
475 | static int do_submodule_path(struct strbuf *buf, const char *path, | |
476 | const char *fmt, va_list args) | |
0bad611b | 477 | { |
0bad611b | 478 | const char *git_dir; |
11f9dd71 MK |
479 | struct strbuf git_submodule_common_dir = STRBUF_INIT; |
480 | struct strbuf git_submodule_dir = STRBUF_INIT; | |
99b43a61 JK |
481 | const struct submodule *sub; |
482 | int err = 0; | |
0bad611b | 483 | |
4ef9caf5 | 484 | strbuf_addstr(buf, path); |
00b6c178 | 485 | strbuf_complete(buf, '/'); |
4ef9caf5 | 486 | strbuf_addstr(buf, ".git"); |
0bad611b | 487 | |
4ef9caf5 | 488 | git_dir = read_gitfile(buf->buf); |
0bad611b | 489 | if (git_dir) { |
4ef9caf5 NTND |
490 | strbuf_reset(buf); |
491 | strbuf_addstr(buf, git_dir); | |
0bad611b | 492 | } |
99b43a61 JK |
493 | if (!is_git_directory(buf->buf)) { |
494 | gitmodules_config(); | |
495 | sub = submodule_from_path(null_sha1, path); | |
496 | if (!sub) { | |
497 | err = SUBMODULE_PATH_ERR_NOT_CONFIGURED; | |
498 | goto cleanup; | |
499 | } | |
500 | strbuf_reset(buf); | |
501 | strbuf_git_path(buf, "%s/%s", "modules", sub->name); | |
502 | } | |
503 | ||
4ef9caf5 | 504 | strbuf_addch(buf, '/'); |
8109984d | 505 | strbuf_addbuf(&git_submodule_dir, buf); |
0bad611b | 506 | |
4ef9caf5 | 507 | strbuf_vaddf(buf, fmt, args); |
11f9dd71 MK |
508 | |
509 | if (get_common_dir_noenv(&git_submodule_common_dir, git_submodule_dir.buf)) | |
510 | update_common_dir(buf, git_submodule_dir.len, git_submodule_common_dir.buf); | |
511 | ||
4ef9caf5 | 512 | strbuf_cleanup_path(buf); |
11f9dd71 | 513 | |
99b43a61 | 514 | cleanup: |
11f9dd71 MK |
515 | strbuf_release(&git_submodule_dir); |
516 | strbuf_release(&git_submodule_common_dir); | |
99b43a61 JK |
517 | |
518 | return err; | |
f5895fd3 JK |
519 | } |
520 | ||
f5895fd3 JK |
521 | char *git_pathdup_submodule(const char *path, const char *fmt, ...) |
522 | { | |
99b43a61 | 523 | int err; |
f5895fd3 JK |
524 | va_list args; |
525 | struct strbuf buf = STRBUF_INIT; | |
526 | va_start(args, fmt); | |
99b43a61 | 527 | err = do_submodule_path(&buf, path, fmt, args); |
f5895fd3 | 528 | va_end(args); |
99b43a61 JK |
529 | if (err) { |
530 | strbuf_release(&buf); | |
531 | return NULL; | |
532 | } | |
f5895fd3 JK |
533 | return strbuf_detach(&buf, NULL); |
534 | } | |
535 | ||
99b43a61 JK |
536 | int strbuf_git_path_submodule(struct strbuf *buf, const char *path, |
537 | const char *fmt, ...) | |
f5895fd3 | 538 | { |
99b43a61 | 539 | int err; |
f5895fd3 JK |
540 | va_list args; |
541 | va_start(args, fmt); | |
99b43a61 | 542 | err = do_submodule_path(buf, path, fmt, args); |
f5895fd3 | 543 | va_end(args); |
99b43a61 JK |
544 | |
545 | return err; | |
f5895fd3 JK |
546 | } |
547 | ||
15cdfea7 NTND |
548 | static void do_git_common_path(struct strbuf *buf, |
549 | const char *fmt, | |
550 | va_list args) | |
551 | { | |
552 | strbuf_addstr(buf, get_git_common_dir()); | |
553 | if (buf->len && !is_dir_sep(buf->buf[buf->len - 1])) | |
554 | strbuf_addch(buf, '/'); | |
555 | strbuf_vaddf(buf, fmt, args); | |
556 | strbuf_cleanup_path(buf); | |
557 | } | |
558 | ||
559 | const char *git_common_path(const char *fmt, ...) | |
560 | { | |
561 | struct strbuf *pathname = get_pathname(); | |
562 | va_list args; | |
563 | va_start(args, fmt); | |
564 | do_git_common_path(pathname, fmt, args); | |
565 | va_end(args); | |
566 | return pathname->buf; | |
567 | } | |
568 | ||
569 | void strbuf_git_common_path(struct strbuf *sb, const char *fmt, ...) | |
570 | { | |
571 | va_list args; | |
572 | va_start(args, fmt); | |
573 | do_git_common_path(sb, fmt, args); | |
574 | va_end(args); | |
575 | } | |
576 | ||
c847f537 | 577 | int validate_headref(const char *path) |
0870ca7f JH |
578 | { |
579 | struct stat st; | |
580 | char *buf, buffer[256]; | |
c847f537 | 581 | unsigned char sha1[20]; |
0104ca09 HO |
582 | int fd; |
583 | ssize_t len; | |
0870ca7f JH |
584 | |
585 | if (lstat(path, &st) < 0) | |
586 | return -1; | |
587 | ||
588 | /* Make sure it is a "refs/.." symlink */ | |
589 | if (S_ISLNK(st.st_mode)) { | |
590 | len = readlink(path, buffer, sizeof(buffer)-1); | |
222b1673 | 591 | if (len >= 5 && !memcmp("refs/", buffer, 5)) |
0870ca7f JH |
592 | return 0; |
593 | return -1; | |
594 | } | |
595 | ||
596 | /* | |
597 | * Anything else, just open it and try to see if it is a symbolic ref. | |
598 | */ | |
599 | fd = open(path, O_RDONLY); | |
600 | if (fd < 0) | |
601 | return -1; | |
93d26e4c | 602 | len = read_in_full(fd, buffer, sizeof(buffer)-1); |
0870ca7f JH |
603 | close(fd); |
604 | ||
605 | /* | |
606 | * Is it a symbolic ref? | |
607 | */ | |
c847f537 | 608 | if (len < 4) |
0870ca7f | 609 | return -1; |
c847f537 JH |
610 | if (!memcmp("ref:", buffer, 4)) { |
611 | buf = buffer + 4; | |
612 | len -= 4; | |
613 | while (len && isspace(*buf)) | |
614 | buf++, len--; | |
222b1673 | 615 | if (len >= 5 && !memcmp("refs/", buf, 5)) |
c847f537 JH |
616 | return 0; |
617 | } | |
618 | ||
619 | /* | |
620 | * Is this a detached HEAD? | |
621 | */ | |
622 | if (!get_sha1_hex(buffer, sha1)) | |
0870ca7f | 623 | return 0; |
c847f537 | 624 | |
0870ca7f JH |
625 | return -1; |
626 | } | |
627 | ||
395de250 | 628 | static struct passwd *getpw_str(const char *username, size_t len) |
54f4b874 | 629 | { |
d79374c7 | 630 | struct passwd *pw; |
5c0b13f8 | 631 | char *username_z = xmemdupz(username, len); |
395de250 MM |
632 | pw = getpwnam(username_z); |
633 | free(username_z); | |
634 | return pw; | |
635 | } | |
54f4b874 | 636 | |
395de250 MM |
637 | /* |
638 | * Return a string with ~ and ~user expanded via getpw*. If buf != NULL, | |
639 | * then it is a newly allocated string. Returns NULL on getpw failure or | |
640 | * if path is NULL. | |
641 | */ | |
642 | char *expand_user_path(const char *path) | |
643 | { | |
644 | struct strbuf user_path = STRBUF_INIT; | |
395de250 MM |
645 | const char *to_copy = path; |
646 | ||
647 | if (path == NULL) | |
648 | goto return_null; | |
649 | if (path[0] == '~') { | |
53ec551c | 650 | const char *first_slash = strchrnul(path, '/'); |
395de250 MM |
651 | const char *username = path + 1; |
652 | size_t username_len = first_slash - username; | |
df2a79f4 MM |
653 | if (username_len == 0) { |
654 | const char *home = getenv("HOME"); | |
79bf1490 JN |
655 | if (!home) |
656 | goto return_null; | |
cedc61a9 | 657 | strbuf_addstr(&user_path, home); |
5ca6b7bb JS |
658 | #ifdef GIT_WINDOWS_NATIVE |
659 | convert_slashes(user_path.buf); | |
660 | #endif | |
df2a79f4 MM |
661 | } else { |
662 | struct passwd *pw = getpw_str(username, username_len); | |
663 | if (!pw) | |
664 | goto return_null; | |
cedc61a9 | 665 | strbuf_addstr(&user_path, pw->pw_dir); |
54f4b874 | 666 | } |
395de250 | 667 | to_copy = first_slash; |
d79374c7 | 668 | } |
cedc61a9 | 669 | strbuf_addstr(&user_path, to_copy); |
395de250 MM |
670 | return strbuf_detach(&user_path, NULL); |
671 | return_null: | |
672 | strbuf_release(&user_path); | |
673 | return NULL; | |
54f4b874 AE |
674 | } |
675 | ||
d79374c7 JH |
676 | /* |
677 | * First, one directory to try is determined by the following algorithm. | |
678 | * | |
679 | * (0) If "strict" is given, the path is used as given and no DWIM is | |
680 | * done. Otherwise: | |
681 | * (1) "~/path" to mean path under the running user's home directory; | |
682 | * (2) "~user/path" to mean path under named user's home directory; | |
683 | * (3) "relative/path" to mean cwd relative directory; or | |
684 | * (4) "/absolute/path" to mean absolute directory. | |
685 | * | |
c8c3f1d0 PT |
686 | * Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git" |
687 | * in this order. We select the first one that is a valid git repository, and | |
688 | * chdir() to it. If none match, or we fail to chdir, we return NULL. | |
d79374c7 JH |
689 | * |
690 | * If all goes well, we return the directory we used to chdir() (but | |
691 | * before ~user is expanded), avoiding getcwd() resolving symbolic | |
692 | * links. User relative paths are also returned as they are given, | |
693 | * except DWIM suffixing. | |
694 | */ | |
1c64b48e | 695 | const char *enter_repo(const char *path, int strict) |
54f4b874 | 696 | { |
e9ba6781 JK |
697 | static struct strbuf validated_path = STRBUF_INIT; |
698 | static struct strbuf used_path = STRBUF_INIT; | |
d79374c7 JH |
699 | |
700 | if (!path) | |
54f4b874 AE |
701 | return NULL; |
702 | ||
d79374c7 JH |
703 | if (!strict) { |
704 | static const char *suffix[] = { | |
b3256eb8 | 705 | "/.git", "", ".git/.git", ".git", NULL, |
d79374c7 | 706 | }; |
03106768 | 707 | const char *gitfile; |
d79374c7 JH |
708 | int len = strlen(path); |
709 | int i; | |
1c64b48e | 710 | while ((1 < len) && (path[len-1] == '/')) |
d79374c7 | 711 | len--; |
1c64b48e | 712 | |
e9ba6781 JK |
713 | /* |
714 | * We can handle arbitrary-sized buffers, but this remains as a | |
715 | * sanity check on untrusted input. | |
716 | */ | |
d79374c7 | 717 | if (PATH_MAX <= len) |
54f4b874 | 718 | return NULL; |
1c64b48e | 719 | |
e9ba6781 JK |
720 | strbuf_reset(&used_path); |
721 | strbuf_reset(&validated_path); | |
722 | strbuf_add(&used_path, path, len); | |
723 | strbuf_add(&validated_path, path, len); | |
724 | ||
725 | if (used_path.buf[0] == '~') { | |
726 | char *newpath = expand_user_path(used_path.buf); | |
727 | if (!newpath) | |
d79374c7 | 728 | return NULL; |
e9ba6781 JK |
729 | strbuf_attach(&used_path, newpath, strlen(newpath), |
730 | strlen(newpath)); | |
d79374c7 | 731 | } |
d79374c7 | 732 | for (i = 0; suffix[i]; i++) { |
b3256eb8 | 733 | struct stat st; |
e9ba6781 JK |
734 | size_t baselen = used_path.len; |
735 | strbuf_addstr(&used_path, suffix[i]); | |
736 | if (!stat(used_path.buf, &st) && | |
b3256eb8 | 737 | (S_ISREG(st.st_mode) || |
e9ba6781 JK |
738 | (S_ISDIR(st.st_mode) && is_git_directory(used_path.buf)))) { |
739 | strbuf_addstr(&validated_path, suffix[i]); | |
d79374c7 JH |
740 | break; |
741 | } | |
e9ba6781 | 742 | strbuf_setlen(&used_path, baselen); |
d79374c7 | 743 | } |
03106768 PH |
744 | if (!suffix[i]) |
745 | return NULL; | |
78891795 | 746 | gitfile = read_gitfile(used_path.buf); |
e9ba6781 JK |
747 | if (gitfile) { |
748 | strbuf_reset(&used_path); | |
749 | strbuf_addstr(&used_path, gitfile); | |
750 | } | |
751 | if (chdir(used_path.buf)) | |
0870ca7f | 752 | return NULL; |
e9ba6781 | 753 | path = validated_path.buf; |
0870ca7f | 754 | } |
1f5fbe1f NTND |
755 | else { |
756 | const char *gitfile = read_gitfile(path); | |
757 | if (gitfile) | |
758 | path = gitfile; | |
759 | if (chdir(path)) | |
760 | return NULL; | |
761 | } | |
54f4b874 | 762 | |
0f64cc40 | 763 | if (is_git_directory(".")) { |
717c3972 | 764 | set_git_dir("."); |
1644162a | 765 | check_repository_format(); |
d79374c7 | 766 | return path; |
54f4b874 AE |
767 | } |
768 | ||
769 | return NULL; | |
770 | } | |
138086a7 | 771 | |
cbe43b84 | 772 | static int calc_shared_perm(int mode) |
138086a7 | 773 | { |
cbe43b84 | 774 | int tweak; |
138086a7 | 775 | |
7875acb6 JK |
776 | if (get_shared_repository() < 0) |
777 | tweak = -get_shared_repository(); | |
5a688fe4 | 778 | else |
7875acb6 | 779 | tweak = get_shared_repository(); |
5a688fe4 JH |
780 | |
781 | if (!(mode & S_IWUSR)) | |
782 | tweak &= ~0222; | |
783 | if (mode & S_IXUSR) | |
784 | /* Copy read bits to execute bits */ | |
785 | tweak |= (tweak & 0444) >> 2; | |
7875acb6 | 786 | if (get_shared_repository() < 0) |
5a688fe4 JH |
787 | mode = (mode & ~0777) | tweak; |
788 | else | |
8c6202d8 | 789 | mode |= tweak; |
06cbe855 | 790 | |
cbe43b84 TB |
791 | return mode; |
792 | } | |
793 | ||
794 | ||
795 | int adjust_shared_perm(const char *path) | |
796 | { | |
797 | int old_mode, new_mode; | |
798 | ||
7875acb6 | 799 | if (!get_shared_repository()) |
cbe43b84 TB |
800 | return 0; |
801 | if (get_st_mode_bits(path, &old_mode) < 0) | |
802 | return -1; | |
803 | ||
804 | new_mode = calc_shared_perm(old_mode); | |
805 | if (S_ISDIR(old_mode)) { | |
06cbe855 | 806 | /* Copy read bits to execute bits */ |
cbe43b84 TB |
807 | new_mode |= (new_mode & 0444) >> 2; |
808 | new_mode |= FORCE_DIR_SET_GID; | |
06cbe855 HO |
809 | } |
810 | ||
cbe43b84 TB |
811 | if (((old_mode ^ new_mode) & ~S_IFMT) && |
812 | chmod(path, (new_mode & ~S_IFMT)) < 0) | |
138086a7 JH |
813 | return -2; |
814 | return 0; | |
815 | } | |
e5392c51 | 816 | |
eb33876c DT |
817 | void safe_create_dir(const char *dir, int share) |
818 | { | |
819 | if (mkdir(dir, 0777) < 0) { | |
820 | if (errno != EEXIST) { | |
821 | perror(dir); | |
822 | exit(1); | |
823 | } | |
824 | } | |
825 | else if (share && adjust_shared_perm(dir)) | |
826 | die(_("Could not make %s writable by group"), dir); | |
827 | } | |
828 | ||
7fbd4221 JX |
829 | static int have_same_root(const char *path1, const char *path2) |
830 | { | |
831 | int is_abs1, is_abs2; | |
832 | ||
833 | is_abs1 = is_absolute_path(path1); | |
834 | is_abs2 = is_absolute_path(path2); | |
835 | return (is_abs1 && is_abs2 && tolower(path1[0]) == tolower(path2[0])) || | |
836 | (!is_abs1 && !is_abs2); | |
837 | } | |
838 | ||
e02ca72f JX |
839 | /* |
840 | * Give path as relative to prefix. | |
841 | * | |
842 | * The strbuf may or may not be used, so do not assume it contains the | |
843 | * returned path. | |
844 | */ | |
845 | const char *relative_path(const char *in, const char *prefix, | |
846 | struct strbuf *sb) | |
044bbbcb | 847 | { |
e02ca72f JX |
848 | int in_len = in ? strlen(in) : 0; |
849 | int prefix_len = prefix ? strlen(prefix) : 0; | |
850 | int in_off = 0; | |
851 | int prefix_off = 0; | |
288123f0 JH |
852 | int i = 0, j = 0; |
853 | ||
e02ca72f JX |
854 | if (!in_len) |
855 | return "./"; | |
856 | else if (!prefix_len) | |
857 | return in; | |
858 | ||
2f36eed9 | 859 | if (have_same_root(in, prefix)) |
7fbd4221 | 860 | /* bypass dos_drive, for "c:" is identical to "C:" */ |
2f36eed9 JS |
861 | i = j = has_dos_drive_prefix(in); |
862 | else { | |
7fbd4221 JX |
863 | return in; |
864 | } | |
865 | ||
e02ca72f JX |
866 | while (i < prefix_len && j < in_len && prefix[i] == in[j]) { |
867 | if (is_dir_sep(prefix[i])) { | |
868 | while (is_dir_sep(prefix[i])) | |
288123f0 | 869 | i++; |
e02ca72f JX |
870 | while (is_dir_sep(in[j])) |
871 | j++; | |
872 | prefix_off = i; | |
873 | in_off = j; | |
874 | } else { | |
875 | i++; | |
876 | j++; | |
877 | } | |
878 | } | |
879 | ||
880 | if ( | |
881 | /* "prefix" seems like prefix of "in" */ | |
882 | i >= prefix_len && | |
883 | /* | |
884 | * but "/foo" is not a prefix of "/foobar" | |
885 | * (i.e. prefix not end with '/') | |
886 | */ | |
887 | prefix_off < prefix_len) { | |
888 | if (j >= in_len) { | |
889 | /* in="/a/b", prefix="/a/b" */ | |
890 | in_off = in_len; | |
891 | } else if (is_dir_sep(in[j])) { | |
892 | /* in="/a/b/c", prefix="/a/b" */ | |
893 | while (is_dir_sep(in[j])) | |
288123f0 | 894 | j++; |
e02ca72f JX |
895 | in_off = j; |
896 | } else { | |
897 | /* in="/a/bbb/c", prefix="/a/b" */ | |
898 | i = prefix_off; | |
899 | } | |
900 | } else if ( | |
901 | /* "in" is short than "prefix" */ | |
902 | j >= in_len && | |
903 | /* "in" not end with '/' */ | |
904 | in_off < in_len) { | |
905 | if (is_dir_sep(prefix[i])) { | |
906 | /* in="/a/b", prefix="/a/b/c/" */ | |
907 | while (is_dir_sep(prefix[i])) | |
908 | i++; | |
909 | in_off = in_len; | |
910 | } | |
911 | } | |
912 | in += in_off; | |
913 | in_len -= in_off; | |
914 | ||
915 | if (i >= prefix_len) { | |
916 | if (!in_len) | |
917 | return "./"; | |
918 | else | |
919 | return in; | |
920 | } | |
921 | ||
922 | strbuf_reset(sb); | |
923 | strbuf_grow(sb, in_len); | |
924 | ||
925 | while (i < prefix_len) { | |
926 | if (is_dir_sep(prefix[i])) { | |
927 | strbuf_addstr(sb, "../"); | |
928 | while (is_dir_sep(prefix[i])) | |
929 | i++; | |
288123f0 | 930 | continue; |
288123f0 JH |
931 | } |
932 | i++; | |
288123f0 | 933 | } |
e02ca72f JX |
934 | if (!is_dir_sep(prefix[prefix_len - 1])) |
935 | strbuf_addstr(sb, "../"); | |
936 | ||
937 | strbuf_addstr(sb, in); | |
938 | ||
939 | return sb->buf; | |
044bbbcb | 940 | } |
ae299be0 | 941 | |
41894ae3 JX |
942 | /* |
943 | * A simpler implementation of relative_path | |
944 | * | |
945 | * Get relative path by removing "prefix" from "in". This function | |
946 | * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter | |
947 | * to increase performance when traversing the path to work_tree. | |
948 | */ | |
949 | const char *remove_leading_path(const char *in, const char *prefix) | |
950 | { | |
46357688 | 951 | static struct strbuf buf = STRBUF_INIT; |
41894ae3 JX |
952 | int i = 0, j = 0; |
953 | ||
954 | if (!prefix || !prefix[0]) | |
955 | return in; | |
956 | while (prefix[i]) { | |
957 | if (is_dir_sep(prefix[i])) { | |
958 | if (!is_dir_sep(in[j])) | |
959 | return in; | |
960 | while (is_dir_sep(prefix[i])) | |
961 | i++; | |
962 | while (is_dir_sep(in[j])) | |
963 | j++; | |
964 | continue; | |
965 | } else if (in[j] != prefix[i]) { | |
966 | return in; | |
967 | } | |
968 | i++; | |
969 | j++; | |
970 | } | |
971 | if ( | |
972 | /* "/foo" is a prefix of "/foo" */ | |
973 | in[j] && | |
974 | /* "/foo" is not a prefix of "/foobar" */ | |
975 | !is_dir_sep(prefix[i-1]) && !is_dir_sep(in[j]) | |
976 | ) | |
977 | return in; | |
978 | while (is_dir_sep(in[j])) | |
979 | j++; | |
46357688 JK |
980 | |
981 | strbuf_reset(&buf); | |
41894ae3 | 982 | if (!in[j]) |
46357688 | 983 | strbuf_addstr(&buf, "."); |
41894ae3 | 984 | else |
46357688 JK |
985 | strbuf_addstr(&buf, in + j); |
986 | return buf.buf; | |
41894ae3 JX |
987 | } |
988 | ||
ae299be0 | 989 | /* |
f2a782b8 | 990 | * It is okay if dst == src, but they should not overlap otherwise. |
ae299be0 | 991 | * |
f2a782b8 JS |
992 | * Performs the following normalizations on src, storing the result in dst: |
993 | * - Ensures that components are separated by '/' (Windows only) | |
7814fbe3 | 994 | * - Squashes sequences of '/' except "//server/share" on Windows |
ae299be0 DR |
995 | * - Removes "." components. |
996 | * - Removes ".." components, and the components the precede them. | |
f2a782b8 JS |
997 | * Returns failure (non-zero) if a ".." component appears as first path |
998 | * component anytime during the normalization. Otherwise, returns success (0). | |
ae299be0 DR |
999 | * |
1000 | * Note that this function is purely textual. It does not follow symlinks, | |
1001 | * verify the existence of the path, or make any system calls. | |
645a29c4 NTND |
1002 | * |
1003 | * prefix_len != NULL is for a specific case of prefix_pathspec(): | |
1004 | * assume that src == dst and src[0..prefix_len-1] is already | |
1005 | * normalized, any time "../" eats up to the prefix_len part, | |
1006 | * prefix_len is reduced. In the end prefix_len is the remaining | |
1007 | * prefix that has not been overridden by user pathspec. | |
b2a7123b RD |
1008 | * |
1009 | * NEEDSWORK: This function doesn't perform normalization w.r.t. trailing '/'. | |
1010 | * For everything but the root folder itself, the normalized path should not | |
1011 | * end with a '/', then the callers need to be fixed up accordingly. | |
1012 | * | |
ae299be0 | 1013 | */ |
645a29c4 | 1014 | int normalize_path_copy_len(char *dst, const char *src, int *prefix_len) |
ae299be0 | 1015 | { |
f3cad0ad | 1016 | char *dst0; |
7814fbe3 | 1017 | const char *end; |
ae299be0 | 1018 | |
7814fbe3 JS |
1019 | /* |
1020 | * Copy initial part of absolute path: "/", "C:/", "//server/share/". | |
1021 | */ | |
1022 | end = src + offset_1st_component(src); | |
1023 | while (src < end) { | |
1024 | char c = *src++; | |
1025 | if (is_dir_sep(c)) | |
1026 | c = '/'; | |
1027 | *dst++ = c; | |
1028 | } | |
f3cad0ad | 1029 | dst0 = dst; |
ae299be0 | 1030 | |
7814fbe3 JS |
1031 | while (is_dir_sep(*src)) |
1032 | src++; | |
f3cad0ad JS |
1033 | |
1034 | for (;;) { | |
1035 | char c = *src; | |
1036 | ||
1037 | /* | |
1038 | * A path component that begins with . could be | |
1039 | * special: | |
1040 | * (1) "." and ends -- ignore and terminate. | |
1041 | * (2) "./" -- ignore them, eat slash and continue. | |
1042 | * (3) ".." and ends -- strip one and terminate. | |
1043 | * (4) "../" -- strip one, eat slash and continue. | |
1044 | */ | |
1045 | if (c == '.') { | |
1046 | if (!src[1]) { | |
1047 | /* (1) */ | |
1048 | src++; | |
1049 | } else if (is_dir_sep(src[1])) { | |
1050 | /* (2) */ | |
1051 | src += 2; | |
1052 | while (is_dir_sep(*src)) | |
1053 | src++; | |
1054 | continue; | |
1055 | } else if (src[1] == '.') { | |
1056 | if (!src[2]) { | |
1057 | /* (3) */ | |
1058 | src += 2; | |
1059 | goto up_one; | |
1060 | } else if (is_dir_sep(src[2])) { | |
1061 | /* (4) */ | |
1062 | src += 3; | |
1063 | while (is_dir_sep(*src)) | |
1064 | src++; | |
1065 | goto up_one; | |
1066 | } | |
1067 | } | |
1068 | } | |
ae299be0 | 1069 | |
f3cad0ad JS |
1070 | /* copy up to the next '/', and eat all '/' */ |
1071 | while ((c = *src++) != '\0' && !is_dir_sep(c)) | |
1072 | *dst++ = c; | |
1073 | if (is_dir_sep(c)) { | |
1074 | *dst++ = '/'; | |
1075 | while (is_dir_sep(c)) | |
1076 | c = *src++; | |
1077 | src--; | |
1078 | } else if (!c) | |
1079 | break; | |
1080 | continue; | |
1081 | ||
1082 | up_one: | |
1083 | /* | |
1084 | * dst0..dst is prefix portion, and dst[-1] is '/'; | |
1085 | * go up one level. | |
1086 | */ | |
f42302b4 JS |
1087 | dst--; /* go to trailing '/' */ |
1088 | if (dst <= dst0) | |
f3cad0ad | 1089 | return -1; |
f42302b4 JS |
1090 | /* Windows: dst[-1] cannot be backslash anymore */ |
1091 | while (dst0 < dst && dst[-1] != '/') | |
1092 | dst--; | |
645a29c4 NTND |
1093 | if (prefix_len && *prefix_len > dst - dst0) |
1094 | *prefix_len = dst - dst0; | |
f3cad0ad | 1095 | } |
ae299be0 | 1096 | *dst = '\0'; |
f3cad0ad | 1097 | return 0; |
ae299be0 | 1098 | } |
0454dd93 | 1099 | |
645a29c4 NTND |
1100 | int normalize_path_copy(char *dst, const char *src) |
1101 | { | |
1102 | return normalize_path_copy_len(dst, src, NULL); | |
1103 | } | |
1104 | ||
0454dd93 DR |
1105 | /* |
1106 | * path = Canonical absolute path | |
9e2326c7 MH |
1107 | * prefixes = string_list containing normalized, absolute paths without |
1108 | * trailing slashes (except for the root directory, which is denoted by "/"). | |
0454dd93 | 1109 | * |
9e2326c7 | 1110 | * Determines, for each path in prefixes, whether the "prefix" |
0454dd93 DR |
1111 | * is an ancestor directory of path. Returns the length of the longest |
1112 | * ancestor directory, excluding any trailing slashes, or -1 if no prefix | |
31171d9e MH |
1113 | * is an ancestor. (Note that this means 0 is returned if prefixes is |
1114 | * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories | |
0454dd93 DR |
1115 | * are not considered to be their own ancestors. path must be in a |
1116 | * canonical form: empty components, or "." or ".." components are not | |
9e2326c7 | 1117 | * allowed. |
0454dd93 | 1118 | */ |
31171d9e | 1119 | int longest_ancestor_length(const char *path, struct string_list *prefixes) |
0454dd93 | 1120 | { |
a5ccdbe4 | 1121 | int i, max_len = -1; |
0454dd93 | 1122 | |
31171d9e | 1123 | if (!strcmp(path, "/")) |
0454dd93 DR |
1124 | return -1; |
1125 | ||
31171d9e MH |
1126 | for (i = 0; i < prefixes->nr; i++) { |
1127 | const char *ceil = prefixes->items[i].string; | |
a5ccdbe4 MH |
1128 | int len = strlen(ceil); |
1129 | ||
9e2326c7 MH |
1130 | if (len == 1 && ceil[0] == '/') |
1131 | len = 0; /* root matches anything, with length 0 */ | |
1132 | else if (!strncmp(path, ceil, len) && path[len] == '/') | |
1133 | ; /* match of length len */ | |
1134 | else | |
1135 | continue; /* no match */ | |
0454dd93 | 1136 | |
9e2326c7 | 1137 | if (len > max_len) |
0454dd93 | 1138 | max_len = len; |
0454dd93 DR |
1139 | } |
1140 | ||
1141 | return max_len; | |
1142 | } | |
4fcc86b0 JS |
1143 | |
1144 | /* strip arbitrary amount of directory separators at end of path */ | |
1145 | static inline int chomp_trailing_dir_sep(const char *path, int len) | |
1146 | { | |
1147 | while (len && is_dir_sep(path[len - 1])) | |
1148 | len--; | |
1149 | return len; | |
1150 | } | |
1151 | ||
1152 | /* | |
1153 | * If path ends with suffix (complete path components), returns the | |
1154 | * part before suffix (sans trailing directory separators). | |
1155 | * Otherwise returns NULL. | |
1156 | */ | |
1157 | char *strip_path_suffix(const char *path, const char *suffix) | |
1158 | { | |
1159 | int path_len = strlen(path), suffix_len = strlen(suffix); | |
1160 | ||
1161 | while (suffix_len) { | |
1162 | if (!path_len) | |
1163 | return NULL; | |
1164 | ||
1165 | if (is_dir_sep(path[path_len - 1])) { | |
1166 | if (!is_dir_sep(suffix[suffix_len - 1])) | |
1167 | return NULL; | |
1168 | path_len = chomp_trailing_dir_sep(path, path_len); | |
1169 | suffix_len = chomp_trailing_dir_sep(suffix, suffix_len); | |
1170 | } | |
1171 | else if (path[--path_len] != suffix[--suffix_len]) | |
1172 | return NULL; | |
1173 | } | |
1174 | ||
1175 | if (path_len && !is_dir_sep(path[path_len - 1])) | |
1176 | return NULL; | |
1177 | return xstrndup(path, chomp_trailing_dir_sep(path, path_len)); | |
1178 | } | |
34b6cb8b SP |
1179 | |
1180 | int daemon_avoid_alias(const char *p) | |
1181 | { | |
1182 | int sl, ndot; | |
1183 | ||
1184 | /* | |
1185 | * This resurrects the belts and suspenders paranoia check by HPA | |
1186 | * done in <435560F7.4080006@zytor.com> thread, now enter_repo() | |
9517e6b8 | 1187 | * does not do getcwd() based path canonicalization. |
34b6cb8b SP |
1188 | * |
1189 | * sl becomes true immediately after seeing '/' and continues to | |
1190 | * be true as long as dots continue after that without intervening | |
1191 | * non-dot character. | |
1192 | */ | |
1193 | if (!p || (*p != '/' && *p != '~')) | |
1194 | return -1; | |
1195 | sl = 1; ndot = 0; | |
1196 | p++; | |
1197 | ||
1198 | while (1) { | |
1199 | char ch = *p++; | |
1200 | if (sl) { | |
1201 | if (ch == '.') | |
1202 | ndot++; | |
1203 | else if (ch == '/') { | |
1204 | if (ndot < 3) | |
1205 | /* reject //, /./ and /../ */ | |
1206 | return -1; | |
1207 | ndot = 0; | |
1208 | } | |
1209 | else if (ch == 0) { | |
1210 | if (0 < ndot && ndot < 3) | |
1211 | /* reject /.$ and /..$ */ | |
1212 | return -1; | |
1213 | return 0; | |
1214 | } | |
1215 | else | |
1216 | sl = ndot = 0; | |
1217 | } | |
1218 | else if (ch == 0) | |
1219 | return 0; | |
1220 | else if (ch == '/') { | |
1221 | sl = 1; | |
1222 | ndot = 0; | |
1223 | } | |
1224 | } | |
1225 | } | |
4bb43de2 | 1226 | |
1d1d69bc JS |
1227 | static int only_spaces_and_periods(const char *path, size_t len, size_t skip) |
1228 | { | |
1229 | if (len < skip) | |
1230 | return 0; | |
1231 | len -= skip; | |
1232 | path += skip; | |
1233 | while (len-- > 0) { | |
1234 | char c = *(path++); | |
1235 | if (c != ' ' && c != '.') | |
1236 | return 0; | |
1237 | } | |
1238 | return 1; | |
1239 | } | |
1240 | ||
1241 | int is_ntfs_dotgit(const char *name) | |
1242 | { | |
1243 | int len; | |
1244 | ||
1245 | for (len = 0; ; len++) | |
1246 | if (!name[len] || name[len] == '\\' || is_dir_sep(name[len])) { | |
1247 | if (only_spaces_and_periods(name, len, 4) && | |
1248 | !strncasecmp(name, ".git", 4)) | |
1249 | return 1; | |
1250 | if (only_spaces_and_periods(name, len, 5) && | |
1251 | !strncasecmp(name, "git~1", 5)) | |
1252 | return 1; | |
1253 | if (name[len] != '\\') | |
1254 | return 0; | |
1255 | name += len + 1; | |
1256 | len = -1; | |
1257 | } | |
1258 | } | |
ea19289b PT |
1259 | |
1260 | char *xdg_config_home(const char *filename) | |
1261 | { | |
1262 | const char *home, *config_home; | |
1263 | ||
1264 | assert(filename); | |
1265 | config_home = getenv("XDG_CONFIG_HOME"); | |
1266 | if (config_home && *config_home) | |
1267 | return mkpathdup("%s/git/%s", config_home, filename); | |
1268 | ||
1269 | home = getenv("HOME"); | |
1270 | if (home) | |
1271 | return mkpathdup("%s/.config/git/%s", home, filename); | |
1272 | return NULL; | |
1273 | } | |
f932729c JK |
1274 | |
1275 | GIT_PATH_FUNC(git_path_cherry_pick_head, "CHERRY_PICK_HEAD") | |
1276 | GIT_PATH_FUNC(git_path_revert_head, "REVERT_HEAD") | |
1277 | GIT_PATH_FUNC(git_path_squash_msg, "SQUASH_MSG") | |
1278 | GIT_PATH_FUNC(git_path_merge_msg, "MERGE_MSG") | |
1279 | GIT_PATH_FUNC(git_path_merge_rr, "MERGE_RR") | |
1280 | GIT_PATH_FUNC(git_path_merge_mode, "MERGE_MODE") | |
1281 | GIT_PATH_FUNC(git_path_merge_head, "MERGE_HEAD") | |
1282 | GIT_PATH_FUNC(git_path_fetch_head, "FETCH_HEAD") | |
1283 | GIT_PATH_FUNC(git_path_shallow, "shallow") |