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Commit | Line | Data |
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d288a700 | 1 | #include "cache.h" |
e90fdc39 JS |
2 | #include "dir.h" |
3 | ||
4 | static int inside_git_dir = -1; | |
5 | static int inside_work_tree = -1; | |
d288a700 | 6 | |
edc54fb5 | 7 | char *prefix_path(const char *prefix, int len, const char *path) |
d089ebaa JH |
8 | { |
9 | const char *orig = path; | |
18e051a3 CMAB |
10 | char *sanitized; |
11 | if (is_absolute_path(orig)) { | |
e2a57aac | 12 | const char *temp = real_path(path); |
18e051a3 CMAB |
13 | sanitized = xmalloc(len + strlen(temp) + 1); |
14 | strcpy(sanitized, temp); | |
15 | } else { | |
16 | sanitized = xmalloc(len + strlen(path) + 1); | |
d089ebaa JH |
17 | if (len) |
18 | memcpy(sanitized, prefix, len); | |
19 | strcpy(sanitized + len, path); | |
f332726e | 20 | } |
f3cad0ad | 21 | if (normalize_path_copy(sanitized, sanitized)) |
d089ebaa | 22 | goto error_out; |
9a13ba1b | 23 | if (is_absolute_path(orig)) { |
72ec8ba6 | 24 | size_t root_len, len, total; |
d089ebaa | 25 | const char *work_tree = get_git_work_tree(); |
b3100fd5 JH |
26 | if (!work_tree) |
27 | goto error_out; | |
28 | len = strlen(work_tree); | |
72ec8ba6 | 29 | root_len = offset_1st_component(work_tree); |
b3100fd5 | 30 | total = strlen(sanitized) + 1; |
d089ebaa | 31 | if (strncmp(sanitized, work_tree, len) || |
72ec8ba6 | 32 | (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) { |
d089ebaa | 33 | error_out: |
62525ef7 | 34 | die("'%s' is outside repository", orig); |
d089ebaa JH |
35 | } |
36 | if (sanitized[len] == '/') | |
37 | len++; | |
38 | memmove(sanitized, sanitized + len, total - len); | |
39 | } | |
40 | return sanitized; | |
f332726e LT |
41 | } |
42 | ||
c6e8c800 JH |
43 | int check_filename(const char *prefix, const char *arg) |
44 | { | |
45 | const char *name; | |
46 | struct stat st; | |
47 | ||
48 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
49 | if (!lstat(name, &st)) | |
50 | return 1; /* file exists */ | |
51 | if (errno == ENOENT || errno == ENOTDIR) | |
52 | return 0; /* file does not exist */ | |
53 | die_errno("failed to stat '%s'", arg); | |
54 | } | |
55 | ||
009fee47 MM |
56 | static void NORETURN die_verify_filename(const char *prefix, const char *arg) |
57 | { | |
58 | unsigned char sha1[20]; | |
59 | unsigned mode; | |
0e539dca JH |
60 | |
61 | /* | |
62 | * Saying "'(icase)foo' does not exist in the index" when the | |
63 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
64 | * begins with a colon and is followed by a non-alnum; do not | |
65 | * let get_sha1_with_mode_1(only_to_die=1) to even trigger. | |
66 | */ | |
67 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
68 | /* try a detailed diagnostic ... */ | |
69 | get_sha1_with_mode_1(arg, sha1, &mode, 1, prefix); | |
70 | ||
009fee47 MM |
71 | /* ... or fall back the most general message. */ |
72 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
73 | "Use '--' to separate paths from revisions", arg); | |
74 | ||
75 | } | |
76 | ||
e23d0b4a LT |
77 | /* |
78 | * Verify a filename that we got as an argument for a pathspec | |
79 | * entry. Note that a filename that begins with "-" never verifies | |
80 | * as true, because even if such a filename were to exist, we want | |
81 | * it to be preceded by the "--" marker (or we want the user to | |
82 | * use a format like "./-filename") | |
83 | */ | |
84 | void verify_filename(const char *prefix, const char *arg) | |
85 | { | |
e23d0b4a LT |
86 | if (*arg == '-') |
87 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 88 | if (check_filename(prefix, arg)) |
e23d0b4a | 89 | return; |
009fee47 | 90 | die_verify_filename(prefix, arg); |
e23d0b4a LT |
91 | } |
92 | ||
ea92f41f JH |
93 | /* |
94 | * Opposite of the above: the command line did not have -- marker | |
95 | * and we parsed the arg as a refname. It should not be interpretable | |
96 | * as a filename. | |
97 | */ | |
98 | void verify_non_filename(const char *prefix, const char *arg) | |
99 | { | |
7ae3df8c | 100 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 101 | return; |
ea92f41f JH |
102 | if (*arg == '-') |
103 | return; /* flag */ | |
c6e8c800 JH |
104 | if (!check_filename(prefix, arg)) |
105 | return; | |
106 | die("ambiguous argument '%s': both revision and filename\n" | |
107 | "Use '--' to separate filenames from revisions", arg); | |
ea92f41f JH |
108 | } |
109 | ||
8a42c985 JH |
110 | /* |
111 | * Magic pathspec | |
112 | * | |
113 | * NEEDSWORK: These need to be moved to dir.h or even to a new | |
114 | * pathspec.h when we restructure get_pathspec() users to use the | |
115 | * "struct pathspec" interface. | |
116 | * | |
117 | * Possible future magic semantics include stuff like: | |
118 | * | |
119 | * { PATHSPEC_NOGLOB, '!', "noglob" }, | |
6d942927 | 120 | * { PATHSPEC_ICASE, '\0', "icase" }, |
8a42c985 JH |
121 | * { PATHSPEC_RECURSIVE, '*', "recursive" }, |
122 | * { PATHSPEC_REGEXP, '\0', "regexp" }, | |
123 | * | |
124 | */ | |
125 | #define PATHSPEC_FROMTOP (1<<0) | |
126 | ||
488201c8 | 127 | static struct pathspec_magic { |
8a42c985 JH |
128 | unsigned bit; |
129 | char mnemonic; /* this cannot be ':'! */ | |
130 | const char *name; | |
131 | } pathspec_magic[] = { | |
132 | { PATHSPEC_FROMTOP, '/', "top" }, | |
133 | }; | |
134 | ||
135 | /* | |
136 | * Take an element of a pathspec and check for magic signatures. | |
137 | * Append the result to the prefix. | |
138 | * | |
139 | * For now, we only parse the syntax and throw out anything other than | |
140 | * "top" magic. | |
141 | * | |
142 | * NEEDSWORK: This needs to be rewritten when we start migrating | |
143 | * get_pathspec() users to use the "struct pathspec" interface. For | |
144 | * example, a pathspec element may be marked as case-insensitive, but | |
145 | * the prefix part must always match literally, and a single stupid | |
146 | * string cannot express such a case. | |
147 | */ | |
488201c8 | 148 | static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt) |
8a42c985 JH |
149 | { |
150 | unsigned magic = 0; | |
151 | const char *copyfrom = elt; | |
6d942927 | 152 | int i; |
8a42c985 JH |
153 | |
154 | if (elt[0] != ':') { | |
155 | ; /* nothing to do */ | |
156 | } else if (elt[1] == '(') { | |
157 | /* longhand */ | |
158 | const char *nextat; | |
159 | for (copyfrom = elt + 2; | |
160 | *copyfrom && *copyfrom != ')'; | |
161 | copyfrom = nextat) { | |
162 | size_t len = strcspn(copyfrom, ",)"); | |
163 | if (copyfrom[len] == ')') | |
164 | nextat = copyfrom + len; | |
165 | else | |
166 | nextat = copyfrom + len + 1; | |
167 | if (!len) | |
168 | continue; | |
169 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) | |
170 | if (strlen(pathspec_magic[i].name) == len && | |
171 | !strncmp(pathspec_magic[i].name, copyfrom, len)) { | |
172 | magic |= pathspec_magic[i].bit; | |
173 | break; | |
174 | } | |
175 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
176 | die("Invalid pathspec magic '%.*s' in '%s'", | |
177 | (int) len, copyfrom, elt); | |
178 | } | |
179 | if (*copyfrom == ')') | |
180 | copyfrom++; | |
181 | } else { | |
182 | /* shorthand */ | |
183 | for (copyfrom = elt + 1; | |
184 | *copyfrom && *copyfrom != ':'; | |
185 | copyfrom++) { | |
186 | char ch = *copyfrom; | |
2f6c9760 JH |
187 | |
188 | if (!is_pathspec_magic(ch)) | |
189 | break; | |
8a42c985 JH |
190 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) |
191 | if (pathspec_magic[i].mnemonic == ch) { | |
192 | magic |= pathspec_magic[i].bit; | |
193 | break; | |
194 | } | |
195 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
2f6c9760 JH |
196 | die("Unimplemented pathspec magic '%c' in '%s'", |
197 | ch, elt); | |
8a42c985 JH |
198 | } |
199 | if (*copyfrom == ':') | |
200 | copyfrom++; | |
201 | } | |
202 | ||
203 | if (magic & PATHSPEC_FROMTOP) | |
6d942927 | 204 | return xstrdup(copyfrom); |
8a42c985 | 205 | else |
6d942927 | 206 | return prefix_path(prefix, prefixlen, copyfrom); |
8a42c985 JH |
207 | } |
208 | ||
6b5ee137 | 209 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 210 | { |
6b5ee137 | 211 | const char *entry = *pathspec; |
d089ebaa | 212 | const char **src, **dst; |
d288a700 LT |
213 | int prefixlen; |
214 | ||
f332726e LT |
215 | if (!prefix && !entry) |
216 | return NULL; | |
d288a700 LT |
217 | |
218 | if (!entry) { | |
219 | static const char *spec[2]; | |
220 | spec[0] = prefix; | |
221 | spec[1] = NULL; | |
222 | return spec; | |
223 | } | |
224 | ||
225 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
226 | src = pathspec; |
227 | dst = pathspec; | |
f332726e | 228 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa | 229 | while (*src) { |
8a42c985 | 230 | *(dst++) = prefix_pathspec(prefix, prefixlen, *src); |
d089ebaa JH |
231 | src++; |
232 | } | |
233 | *dst = NULL; | |
234 | if (!*pathspec) | |
235 | return NULL; | |
236 | return pathspec; | |
d288a700 LT |
237 | } |
238 | ||
8894d535 CB |
239 | const char *pathspec_prefix(const char *prefix, const char **pathspec) |
240 | { | |
241 | const char **p, *n, *prev; | |
242 | unsigned long max; | |
243 | ||
244 | if (!pathspec) | |
245 | return prefix ? xmemdupz(prefix, strlen(prefix)) : NULL; | |
246 | ||
247 | prev = NULL; | |
248 | max = PATH_MAX; | |
249 | for (p = pathspec; (n = *p) != NULL; p++) { | |
250 | int i, len = 0; | |
251 | for (i = 0; i < max; i++) { | |
252 | char c = n[i]; | |
253 | if (prev && prev[i] != c) | |
254 | break; | |
255 | if (!c || c == '*' || c == '?') | |
256 | break; | |
257 | if (c == '/') | |
258 | len = i+1; | |
259 | } | |
260 | prev = n; | |
261 | if (len < max) { | |
262 | max = len; | |
263 | if (!max) | |
264 | break; | |
265 | } | |
266 | } | |
267 | ||
268 | return max ? xmemdupz(prev, max) : NULL; | |
269 | } | |
270 | ||
5f5608bc | 271 | /* |
ad1a382f | 272 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 273 | * We want to see: |
5f5608bc | 274 | * |
790296fd | 275 | * - either an objects/ directory _or_ the proper |
5f5608bc | 276 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 277 | * - a refs/ directory |
8098a178 | 278 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
279 | * a proper "ref:", or a regular file HEAD that has a properly |
280 | * formatted sha1 object name. | |
5f5608bc | 281 | */ |
ad1a382f | 282 | static int is_git_directory(const char *suspect) |
5f5608bc | 283 | { |
ad1a382f SP |
284 | char path[PATH_MAX]; |
285 | size_t len = strlen(suspect); | |
286 | ||
3c9d0414 GB |
287 | if (PATH_MAX <= len + strlen("/objects")) |
288 | die("Too long path: %.*s", 60, suspect); | |
ad1a382f SP |
289 | strcpy(path, suspect); |
290 | if (getenv(DB_ENVIRONMENT)) { | |
291 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
292 | return 0; | |
293 | } | |
294 | else { | |
295 | strcpy(path + len, "/objects"); | |
296 | if (access(path, X_OK)) | |
297 | return 0; | |
298 | } | |
299 | ||
300 | strcpy(path + len, "/refs"); | |
301 | if (access(path, X_OK)) | |
8098a178 | 302 | return 0; |
ad1a382f SP |
303 | |
304 | strcpy(path + len, "/HEAD"); | |
c847f537 | 305 | if (validate_headref(path)) |
ad1a382f SP |
306 | return 0; |
307 | ||
8098a178 | 308 | return 1; |
5f5608bc LT |
309 | } |
310 | ||
68025633 JS |
311 | int is_inside_git_dir(void) |
312 | { | |
e90fdc39 JS |
313 | if (inside_git_dir < 0) |
314 | inside_git_dir = is_inside_dir(get_git_dir()); | |
315 | return inside_git_dir; | |
892c41b9 ML |
316 | } |
317 | ||
892c41b9 ML |
318 | int is_inside_work_tree(void) |
319 | { | |
e90fdc39 JS |
320 | if (inside_work_tree < 0) |
321 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
322 | return inside_work_tree; | |
892c41b9 ML |
323 | } |
324 | ||
f3fa1838 JH |
325 | void setup_work_tree(void) |
326 | { | |
354e6534 JS |
327 | const char *work_tree, *git_dir; |
328 | static int initialized = 0; | |
329 | ||
330 | if (initialized) | |
331 | return; | |
332 | work_tree = get_git_work_tree(); | |
333 | git_dir = get_git_dir(); | |
59f0f2f3 | 334 | if (!is_absolute_path(git_dir)) |
e2a57aac | 335 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
336 | if (!work_tree || chdir(work_tree)) |
337 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
338 | |
339 | /* | |
340 | * Make sure subsequent git processes find correct worktree | |
341 | * if $GIT_WORK_TREE is set relative | |
342 | */ | |
343 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
344 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
345 | ||
e2a57aac | 346 | set_git_dir(relative_path(git_dir, work_tree)); |
354e6534 | 347 | initialized = 1; |
59f0f2f3 MH |
348 | } |
349 | ||
337e51ce | 350 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 351 | { |
337e51ce NTND |
352 | char repo_config[PATH_MAX+1]; |
353 | ||
354 | /* | |
355 | * git_config() can't be used here because it calls git_pathdup() | |
356 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
357 | * set git_dir to ".git". | |
358 | * | |
359 | * We are in gitdir setup, no git dir has been found useable yet. | |
360 | * Use a gentler version of git_config() to check if this repo | |
361 | * is a good one. | |
362 | */ | |
363 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
364 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
365 | if (GIT_REPO_VERSION < repository_format_version) { |
366 | if (!nongit_ok) | |
367 | die ("Expected git repo version <= %d, found %d", | |
368 | GIT_REPO_VERSION, repository_format_version); | |
369 | warning("Expected git repo version <= %d, found %d", | |
370 | GIT_REPO_VERSION, repository_format_version); | |
371 | warning("Please upgrade Git"); | |
372 | *nongit_ok = -1; | |
373 | return -1; | |
374 | } | |
375 | return 0; | |
376 | } | |
377 | ||
b44ebb19 LH |
378 | /* |
379 | * Try to read the location of the git directory from the .git file, | |
380 | * return path to git directory if found. | |
381 | */ | |
13d6ec91 | 382 | const char *read_gitfile(const char *path) |
b44ebb19 LH |
383 | { |
384 | char *buf; | |
40c813e0 BK |
385 | char *dir; |
386 | const char *slash; | |
b44ebb19 LH |
387 | struct stat st; |
388 | int fd; | |
b1905aea | 389 | ssize_t len; |
b44ebb19 LH |
390 | |
391 | if (stat(path, &st)) | |
392 | return NULL; | |
393 | if (!S_ISREG(st.st_mode)) | |
394 | return NULL; | |
395 | fd = open(path, O_RDONLY); | |
396 | if (fd < 0) | |
d824cbba | 397 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
398 | buf = xmalloc(st.st_size + 1); |
399 | len = read_in_full(fd, buf, st.st_size); | |
400 | close(fd); | |
401 | if (len != st.st_size) | |
402 | die("Error reading %s", path); | |
403 | buf[len] = '\0'; | |
404 | if (prefixcmp(buf, "gitdir: ")) | |
405 | die("Invalid gitfile format: %s", path); | |
406 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
407 | len--; | |
408 | if (len < 9) | |
409 | die("No path in gitfile: %s", path); | |
410 | buf[len] = '\0'; | |
40c813e0 BK |
411 | dir = buf + 8; |
412 | ||
413 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
414 | size_t pathlen = slash+1 - path; | |
415 | size_t dirlen = pathlen + len - 8; | |
416 | dir = xmalloc(dirlen + 1); | |
417 | strncpy(dir, path, pathlen); | |
418 | strncpy(dir + pathlen, buf + 8, len - 8); | |
419 | dir[dirlen] = '\0'; | |
420 | free(buf); | |
421 | buf = dir; | |
422 | } | |
423 | ||
424 | if (!is_git_directory(dir)) | |
425 | die("Not a git repository: %s", dir); | |
e2a57aac | 426 | path = real_path(dir); |
40c813e0 | 427 | |
b44ebb19 LH |
428 | free(buf); |
429 | return path; | |
430 | } | |
431 | ||
e4e30347 | 432 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
b3f66fd3 NTND |
433 | char *cwd, int len, |
434 | int *nongit_ok) | |
e4e30347 | 435 | { |
b3f66fd3 NTND |
436 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
437 | const char *worktree; | |
438 | char *gitfile; | |
9b125da4 | 439 | int offset; |
e4e30347 JN |
440 | |
441 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
442 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 443 | |
13d6ec91 | 444 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
445 | if (gitfile) { |
446 | gitfile = xstrdup(gitfile); | |
447 | gitdirenv = gitfile; | |
448 | } | |
449 | ||
e4e30347 JN |
450 | if (!is_git_directory(gitdirenv)) { |
451 | if (nongit_ok) { | |
452 | *nongit_ok = 1; | |
b3f66fd3 | 453 | free(gitfile); |
e4e30347 JN |
454 | return NULL; |
455 | } | |
456 | die("Not a git repository: '%s'", gitdirenv); | |
457 | } | |
b3f66fd3 NTND |
458 | |
459 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
460 | free(gitfile); | |
461 | return NULL; | |
e4e30347 | 462 | } |
b3f66fd3 NTND |
463 | |
464 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
465 | if (work_tree_env) | |
466 | set_git_work_tree(work_tree_env); | |
467 | else if (is_bare_repository_cfg > 0) { | |
468 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
469 | die("core.bare and core.worktree do not make sense"); | |
470 | ||
471 | /* #18, #26 */ | |
472 | set_git_dir(gitdirenv); | |
473 | free(gitfile); | |
e4e30347 | 474 | return NULL; |
b3f66fd3 NTND |
475 | } |
476 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
477 | if (is_absolute_path(git_work_tree_cfg)) | |
478 | set_git_work_tree(git_work_tree_cfg); | |
479 | else { | |
480 | char core_worktree[PATH_MAX]; | |
481 | if (chdir(gitdirenv)) | |
482 | die_errno("Could not chdir to '%s'", gitdirenv); | |
483 | if (chdir(git_work_tree_cfg)) | |
484 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
485 | if (!getcwd(core_worktree, PATH_MAX)) | |
486 | die_errno("Could not get directory '%s'", git_work_tree_cfg); | |
487 | if (chdir(cwd)) | |
488 | die_errno("Could not come back to cwd"); | |
489 | set_git_work_tree(core_worktree); | |
490 | } | |
491 | } | |
492 | else /* #2, #10 */ | |
493 | set_git_work_tree("."); | |
494 | ||
495 | /* set_git_work_tree() must have been called by now */ | |
496 | worktree = get_git_work_tree(); | |
497 | ||
498 | /* both get_git_work_tree() and cwd are already normalized */ | |
499 | if (!strcmp(cwd, worktree)) { /* cwd == worktree */ | |
500 | set_git_dir(gitdirenv); | |
501 | free(gitfile); | |
e4e30347 | 502 | return NULL; |
b3f66fd3 | 503 | } |
e4e30347 | 504 | |
9b125da4 NTND |
505 | offset = dir_inside_of(cwd, worktree); |
506 | if (offset >= 0) { /* cwd inside worktree? */ | |
e2a57aac | 507 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
508 | if (chdir(worktree)) |
509 | die_errno("Could not chdir to '%s'", worktree); | |
510 | cwd[len++] = '/'; | |
511 | cwd[len] = '\0'; | |
512 | free(gitfile); | |
9b125da4 | 513 | return cwd + offset; |
93a00542 | 514 | } |
b3f66fd3 NTND |
515 | |
516 | /* cwd outside worktree */ | |
517 | set_git_dir(gitdirenv); | |
518 | free(gitfile); | |
519 | return NULL; | |
93a00542 JN |
520 | } |
521 | ||
9951d3b3 NTND |
522 | static const char *setup_discovered_git_dir(const char *gitdir, |
523 | char *cwd, int offset, int len, | |
524 | int *nongit_ok) | |
98937bef | 525 | { |
9951d3b3 NTND |
526 | if (check_repository_format_gently(gitdir, nongit_ok)) |
527 | return NULL; | |
98937bef | 528 | |
4868b2ea JN |
529 | /* --work-tree is set without --git-dir; use discovered one */ |
530 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
531 | if (offset != len && !is_absolute_path(gitdir)) | |
e2a57aac | 532 | gitdir = xstrdup(real_path(gitdir)); |
4868b2ea JN |
533 | if (chdir(cwd)) |
534 | die_errno("Could not come back to cwd"); | |
535 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
536 | } | |
537 | ||
9951d3b3 NTND |
538 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
539 | if (is_bare_repository_cfg > 0) { | |
e2a57aac | 540 | set_git_dir(offset == len ? gitdir : real_path(gitdir)); |
9951d3b3 NTND |
541 | if (chdir(cwd)) |
542 | die_errno("Could not come back to cwd"); | |
98937bef | 543 | return NULL; |
9951d3b3 | 544 | } |
98937bef | 545 | |
9951d3b3 NTND |
546 | /* #0, #1, #5, #8, #9, #12, #13 */ |
547 | set_git_work_tree("."); | |
548 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
549 | set_git_dir(gitdir); | |
98937bef | 550 | inside_git_dir = 0; |
9951d3b3 | 551 | inside_work_tree = 1; |
98937bef NTND |
552 | if (offset == len) |
553 | return NULL; | |
554 | ||
555 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
556 | offset++; | |
557 | cwd[len++] = '/'; | |
558 | cwd[len] = 0; | |
559 | return cwd + offset; | |
560 | } | |
561 | ||
1cd8031b NTND |
562 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
563 | static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok) | |
68698da5 JN |
564 | { |
565 | int root_len; | |
566 | ||
1cd8031b NTND |
567 | if (check_repository_format_gently(".", nongit_ok)) |
568 | return NULL; | |
569 | ||
4868b2ea JN |
570 | /* --work-tree is set without --git-dir; use discovered one */ |
571 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
572 | const char *gitdir; | |
573 | ||
574 | gitdir = offset == len ? "." : xmemdupz(cwd, offset); | |
575 | if (chdir(cwd)) | |
576 | die_errno("Could not come back to cwd"); | |
577 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
578 | } | |
579 | ||
68698da5 | 580 | inside_git_dir = 1; |
1cd8031b | 581 | inside_work_tree = 0; |
68698da5 | 582 | if (offset != len) { |
8fc0ae80 NTND |
583 | if (chdir(cwd)) |
584 | die_errno("Cannot come back to cwd"); | |
68698da5 JN |
585 | root_len = offset_1st_component(cwd); |
586 | cwd[offset > root_len ? offset : root_len] = '\0'; | |
587 | set_git_dir(cwd); | |
337e51ce | 588 | } |
1cd8031b | 589 | else |
68698da5 | 590 | set_git_dir("."); |
68698da5 JN |
591 | return NULL; |
592 | } | |
593 | ||
f161edeb JN |
594 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
595 | { | |
596 | if (!nongit_ok) | |
597 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
598 | if (chdir(cwd)) | |
599 | die_errno("Cannot come back to cwd"); | |
600 | *nongit_ok = 1; | |
601 | return NULL; | |
602 | } | |
603 | ||
60c98d1e JN |
604 | static dev_t get_device_or_die(const char *path, const char *prefix) |
605 | { | |
606 | struct stat buf; | |
607 | if (stat(path, &buf)) | |
608 | die_errno("failed to stat '%s%s%s'", | |
609 | prefix ? prefix : "", | |
610 | prefix ? "/" : "", path); | |
611 | return buf.st_dev; | |
612 | } | |
613 | ||
e90fdc39 JS |
614 | /* |
615 | * We cannot decide in this function whether we are in the work tree or | |
616 | * not, since the config can only be read _after_ this function was called. | |
617 | */ | |
a60645f9 | 618 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 619 | { |
0454dd93 | 620 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
d288a700 | 621 | static char cwd[PATH_MAX+1]; |
9951d3b3 NTND |
622 | const char *gitdirenv, *ret; |
623 | char *gitfile; | |
98937bef | 624 | int len, offset, ceil_offset; |
c7d1d1b1 RH |
625 | dev_t current_device = 0; |
626 | int one_filesystem = 1; | |
d288a700 | 627 | |
af05d679 SG |
628 | /* |
629 | * Let's assume that we are in a git repository. | |
630 | * If it turns out later that we are somewhere else, the value will be | |
631 | * updated accordingly. | |
632 | */ | |
633 | if (nongit_ok) | |
634 | *nongit_ok = 0; | |
635 | ||
b3f66fd3 NTND |
636 | if (!getcwd(cwd, sizeof(cwd)-1)) |
637 | die_errno("Unable to read current working directory"); | |
638 | offset = len = strlen(cwd); | |
639 | ||
e90fdc39 JS |
640 | /* |
641 | * If GIT_DIR is set explicitly, we're not going | |
642 | * to do any discovery, but we still do repository | |
643 | * validation. | |
644 | */ | |
ad1a382f | 645 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 646 | if (gitdirenv) |
b3f66fd3 | 647 | return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok); |
d288a700 | 648 | |
0454dd93 | 649 | ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs); |
17d778e7 JH |
650 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
651 | ceil_offset = 1; | |
d288a700 | 652 | |
892c41b9 | 653 | /* |
e90fdc39 | 654 | * Test in the following order (relative to the cwd): |
b44ebb19 | 655 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
656 | * - .git/ |
657 | * - ./ (bare) | |
b44ebb19 | 658 | * - ../.git |
e90fdc39 JS |
659 | * - ../.git/ |
660 | * - ../ (bare) | |
661 | * - ../../.git/ | |
662 | * etc. | |
892c41b9 | 663 | */ |
cf87463e | 664 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e JN |
665 | if (one_filesystem) |
666 | current_device = get_device_or_die(".", NULL); | |
e90fdc39 | 667 | for (;;) { |
13d6ec91 | 668 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
669 | if (gitfile) |
670 | gitdirenv = gitfile = xstrdup(gitfile); | |
671 | else { | |
672 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
673 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
674 | } | |
675 | ||
676 | if (gitdirenv) { | |
677 | ret = setup_discovered_git_dir(gitdirenv, | |
678 | cwd, offset, len, | |
679 | nongit_ok); | |
680 | free(gitfile); | |
681 | return ret; | |
682 | } | |
683 | free(gitfile); | |
684 | ||
68698da5 | 685 | if (is_git_directory(".")) |
1cd8031b NTND |
686 | return setup_bare_git_dir(cwd, offset, len, nongit_ok); |
687 | ||
0454dd93 | 688 | while (--offset > ceil_offset && cwd[offset] != '/'); |
f161edeb JN |
689 | if (offset <= ceil_offset) |
690 | return setup_nongit(cwd, nongit_ok); | |
8030e442 | 691 | if (one_filesystem) { |
60c98d1e JN |
692 | dev_t parent_device = get_device_or_die("..", cwd); |
693 | if (parent_device != current_device) { | |
8030e442 LD |
694 | if (nongit_ok) { |
695 | if (chdir(cwd)) | |
696 | die_errno("Cannot come back to cwd"); | |
697 | *nongit_ok = 1; | |
698 | return NULL; | |
699 | } | |
700 | cwd[offset] = '\0'; | |
701 | die("Not a git repository (or any parent up to mount parent %s)\n" | |
cf87463e | 702 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); |
8030e442 LD |
703 | } |
704 | } | |
502ffe34 LD |
705 | if (chdir("..")) { |
706 | cwd[offset] = '\0'; | |
d824cbba | 707 | die_errno("Cannot change to '%s/..'", cwd); |
502ffe34 | 708 | } |
892c41b9 | 709 | } |
d288a700 | 710 | } |
5e7bfe25 | 711 | |
a60645f9 NTND |
712 | const char *setup_git_directory_gently(int *nongit_ok) |
713 | { | |
714 | const char *prefix; | |
715 | ||
716 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f DA |
717 | if (prefix) |
718 | setenv("GIT_PREFIX", prefix, 1); | |
719 | else | |
720 | setenv("GIT_PREFIX", "", 1); | |
721 | ||
f07d6a1a | 722 | if (startup_info) { |
a60645f9 | 723 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
724 | startup_info->prefix = prefix; |
725 | } | |
a60645f9 NTND |
726 | return prefix; |
727 | } | |
728 | ||
94df2506 JH |
729 | int git_config_perm(const char *var, const char *value) |
730 | { | |
06cbe855 HO |
731 | int i; |
732 | char *endptr; | |
733 | ||
734 | if (value == NULL) | |
735 | return PERM_GROUP; | |
736 | ||
737 | if (!strcmp(value, "umask")) | |
738 | return PERM_UMASK; | |
739 | if (!strcmp(value, "group")) | |
740 | return PERM_GROUP; | |
741 | if (!strcmp(value, "all") || | |
742 | !strcmp(value, "world") || | |
743 | !strcmp(value, "everybody")) | |
744 | return PERM_EVERYBODY; | |
745 | ||
746 | /* Parse octal numbers */ | |
747 | i = strtol(value, &endptr, 8); | |
748 | ||
749 | /* If not an octal number, maybe true/false? */ | |
750 | if (*endptr != 0) | |
751 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
752 | ||
753 | /* | |
754 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 755 | * a chmod value to restrict to. |
06cbe855 HO |
756 | */ |
757 | switch (i) { | |
758 | case PERM_UMASK: /* 0 */ | |
759 | return PERM_UMASK; | |
760 | case OLD_PERM_GROUP: /* 1 */ | |
761 | return PERM_GROUP; | |
762 | case OLD_PERM_EVERYBODY: /* 2 */ | |
763 | return PERM_EVERYBODY; | |
94df2506 | 764 | } |
06cbe855 HO |
765 | |
766 | /* A filemode value was given: 0xxx */ | |
767 | ||
768 | if ((i & 0600) != 0600) | |
769 | die("Problem with core.sharedRepository filemode value " | |
770 | "(0%.3o).\nThe owner of files must always have " | |
771 | "read and write permissions.", i); | |
772 | ||
773 | /* | |
774 | * Mask filemode value. Others can not get write permission. | |
775 | * x flags for directories are handled separately. | |
776 | */ | |
5a688fe4 | 777 | return -(i & 0666); |
94df2506 JH |
778 | } |
779 | ||
ef90d6d4 | 780 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 781 | { |
299726d5 JS |
782 | if (strcmp(var, "core.repositoryformatversion") == 0) |
783 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 784 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 785 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
786 | else if (strcmp(var, "core.bare") == 0) { |
787 | is_bare_repository_cfg = git_config_bool(var, value); | |
788 | if (is_bare_repository_cfg == 1) | |
789 | inside_work_tree = -1; | |
790 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
791 | if (!value) |
792 | return config_error_nonbool(var); | |
8e0f7003 | 793 | free(git_work_tree_cfg); |
e90fdc39 JS |
794 | git_work_tree_cfg = xstrdup(value); |
795 | inside_work_tree = -1; | |
796 | } | |
299726d5 | 797 | return 0; |
ab9cb76f JH |
798 | } |
799 | ||
800 | int check_repository_format(void) | |
801 | { | |
337e51ce | 802 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
803 | } |
804 | ||
e1e5ec86 CB |
805 | /* |
806 | * Returns the "prefix", a path to the current working directory | |
807 | * relative to the work tree root, or NULL, if the current working | |
808 | * directory is not a strict subdirectory of the work tree root. The | |
809 | * prefix always ends with a '/' character. | |
810 | */ | |
5e7bfe25 JH |
811 | const char *setup_git_directory(void) |
812 | { | |
b3f66fd3 | 813 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 814 | } |