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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; | |
10 | char *sanitized = xmalloc(len + strlen(path) + 1); | |
9a13ba1b | 11 | if (is_absolute_path(orig)) |
d089ebaa JH |
12 | strcpy(sanitized, path); |
13 | else { | |
14 | if (len) | |
15 | memcpy(sanitized, prefix, len); | |
16 | strcpy(sanitized + len, path); | |
f332726e | 17 | } |
f3cad0ad | 18 | if (normalize_path_copy(sanitized, sanitized)) |
d089ebaa | 19 | goto error_out; |
9a13ba1b | 20 | if (is_absolute_path(orig)) { |
72ec8ba6 | 21 | size_t root_len, len, total; |
d089ebaa | 22 | const char *work_tree = get_git_work_tree(); |
b3100fd5 JH |
23 | if (!work_tree) |
24 | goto error_out; | |
25 | len = strlen(work_tree); | |
72ec8ba6 | 26 | root_len = offset_1st_component(work_tree); |
b3100fd5 | 27 | total = strlen(sanitized) + 1; |
d089ebaa | 28 | if (strncmp(sanitized, work_tree, len) || |
72ec8ba6 | 29 | (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) { |
d089ebaa | 30 | error_out: |
62525ef7 | 31 | die("'%s' is outside repository", orig); |
d089ebaa JH |
32 | } |
33 | if (sanitized[len] == '/') | |
34 | len++; | |
35 | memmove(sanitized, sanitized + len, total - len); | |
36 | } | |
37 | return sanitized; | |
f332726e LT |
38 | } |
39 | ||
a6080a0a | 40 | /* |
4ca06608 JH |
41 | * Unlike prefix_path, this should be used if the named file does |
42 | * not have to interact with index entry; i.e. name of a random file | |
43 | * on the filesystem. | |
44 | */ | |
45 | const char *prefix_filename(const char *pfx, int pfx_len, const char *arg) | |
46 | { | |
47 | static char path[PATH_MAX]; | |
71064e3f | 48 | #ifndef WIN32 |
9e5f5d4c | 49 | if (!pfx_len || is_absolute_path(arg)) |
4ca06608 JH |
50 | return arg; |
51 | memcpy(path, pfx, pfx_len); | |
52 | strcpy(path + pfx_len, arg); | |
25fe217b JS |
53 | #else |
54 | char *p; | |
55 | /* don't add prefix to absolute paths, but still replace '\' by '/' */ | |
56 | if (is_absolute_path(arg)) | |
57 | pfx_len = 0; | |
9e5f5d4c | 58 | else if (pfx_len) |
25fe217b JS |
59 | memcpy(path, pfx, pfx_len); |
60 | strcpy(path + pfx_len, arg); | |
61 | for (p = path + pfx_len; *p; p++) | |
62 | if (*p == '\\') | |
63 | *p = '/'; | |
64 | #endif | |
4ca06608 JH |
65 | return path; |
66 | } | |
67 | ||
c6e8c800 JH |
68 | int check_filename(const char *prefix, const char *arg) |
69 | { | |
70 | const char *name; | |
71 | struct stat st; | |
72 | ||
73 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
74 | if (!lstat(name, &st)) | |
75 | return 1; /* file exists */ | |
76 | if (errno == ENOENT || errno == ENOTDIR) | |
77 | return 0; /* file does not exist */ | |
78 | die_errno("failed to stat '%s'", arg); | |
79 | } | |
80 | ||
009fee47 MM |
81 | static void NORETURN die_verify_filename(const char *prefix, const char *arg) |
82 | { | |
83 | unsigned char sha1[20]; | |
84 | unsigned mode; | |
85 | /* try a detailed diagnostic ... */ | |
86 | get_sha1_with_mode_1(arg, sha1, &mode, 0, prefix); | |
87 | /* ... or fall back the most general message. */ | |
88 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
89 | "Use '--' to separate paths from revisions", arg); | |
90 | ||
91 | } | |
92 | ||
e23d0b4a LT |
93 | /* |
94 | * Verify a filename that we got as an argument for a pathspec | |
95 | * entry. Note that a filename that begins with "-" never verifies | |
96 | * as true, because even if such a filename were to exist, we want | |
97 | * it to be preceded by the "--" marker (or we want the user to | |
98 | * use a format like "./-filename") | |
99 | */ | |
100 | void verify_filename(const char *prefix, const char *arg) | |
101 | { | |
e23d0b4a LT |
102 | if (*arg == '-') |
103 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 104 | if (check_filename(prefix, arg)) |
e23d0b4a | 105 | return; |
009fee47 | 106 | die_verify_filename(prefix, arg); |
e23d0b4a LT |
107 | } |
108 | ||
ea92f41f JH |
109 | /* |
110 | * Opposite of the above: the command line did not have -- marker | |
111 | * and we parsed the arg as a refname. It should not be interpretable | |
112 | * as a filename. | |
113 | */ | |
114 | void verify_non_filename(const char *prefix, const char *arg) | |
115 | { | |
7ae3df8c | 116 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 117 | return; |
ea92f41f JH |
118 | if (*arg == '-') |
119 | return; /* flag */ | |
c6e8c800 JH |
120 | if (!check_filename(prefix, arg)) |
121 | return; | |
122 | die("ambiguous argument '%s': both revision and filename\n" | |
123 | "Use '--' to separate filenames from revisions", arg); | |
ea92f41f JH |
124 | } |
125 | ||
6b5ee137 | 126 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 127 | { |
6b5ee137 | 128 | const char *entry = *pathspec; |
d089ebaa | 129 | const char **src, **dst; |
d288a700 LT |
130 | int prefixlen; |
131 | ||
f332726e LT |
132 | if (!prefix && !entry) |
133 | return NULL; | |
d288a700 LT |
134 | |
135 | if (!entry) { | |
136 | static const char *spec[2]; | |
137 | spec[0] = prefix; | |
138 | spec[1] = NULL; | |
139 | return spec; | |
140 | } | |
141 | ||
142 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
143 | src = pathspec; |
144 | dst = pathspec; | |
f332726e | 145 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa JH |
146 | while (*src) { |
147 | const char *p = prefix_path(prefix, prefixlen, *src); | |
62525ef7 | 148 | *(dst++) = p; |
d089ebaa JH |
149 | src++; |
150 | } | |
151 | *dst = NULL; | |
152 | if (!*pathspec) | |
153 | return NULL; | |
154 | return pathspec; | |
d288a700 LT |
155 | } |
156 | ||
5f5608bc | 157 | /* |
ad1a382f | 158 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 159 | * We want to see: |
5f5608bc | 160 | * |
790296fd | 161 | * - either an objects/ directory _or_ the proper |
5f5608bc | 162 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 163 | * - a refs/ directory |
8098a178 | 164 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
165 | * a proper "ref:", or a regular file HEAD that has a properly |
166 | * formatted sha1 object name. | |
5f5608bc | 167 | */ |
ad1a382f | 168 | static int is_git_directory(const char *suspect) |
5f5608bc | 169 | { |
ad1a382f SP |
170 | char path[PATH_MAX]; |
171 | size_t len = strlen(suspect); | |
172 | ||
3c9d0414 GB |
173 | if (PATH_MAX <= len + strlen("/objects")) |
174 | die("Too long path: %.*s", 60, suspect); | |
ad1a382f SP |
175 | strcpy(path, suspect); |
176 | if (getenv(DB_ENVIRONMENT)) { | |
177 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
178 | return 0; | |
179 | } | |
180 | else { | |
181 | strcpy(path + len, "/objects"); | |
182 | if (access(path, X_OK)) | |
183 | return 0; | |
184 | } | |
185 | ||
186 | strcpy(path + len, "/refs"); | |
187 | if (access(path, X_OK)) | |
8098a178 | 188 | return 0; |
ad1a382f SP |
189 | |
190 | strcpy(path + len, "/HEAD"); | |
c847f537 | 191 | if (validate_headref(path)) |
ad1a382f SP |
192 | return 0; |
193 | ||
8098a178 | 194 | return 1; |
5f5608bc LT |
195 | } |
196 | ||
68025633 JS |
197 | int is_inside_git_dir(void) |
198 | { | |
e90fdc39 JS |
199 | if (inside_git_dir < 0) |
200 | inside_git_dir = is_inside_dir(get_git_dir()); | |
201 | return inside_git_dir; | |
892c41b9 ML |
202 | } |
203 | ||
892c41b9 ML |
204 | int is_inside_work_tree(void) |
205 | { | |
e90fdc39 JS |
206 | if (inside_work_tree < 0) |
207 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
208 | return inside_work_tree; | |
892c41b9 ML |
209 | } |
210 | ||
f3fa1838 JH |
211 | void setup_work_tree(void) |
212 | { | |
354e6534 JS |
213 | const char *work_tree, *git_dir; |
214 | static int initialized = 0; | |
215 | ||
216 | if (initialized) | |
217 | return; | |
218 | work_tree = get_git_work_tree(); | |
219 | git_dir = get_git_dir(); | |
59f0f2f3 | 220 | if (!is_absolute_path(git_dir)) |
044bbbcb | 221 | git_dir = make_absolute_path(git_dir); |
59f0f2f3 MH |
222 | if (!work_tree || chdir(work_tree)) |
223 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
224 | |
225 | /* | |
226 | * Make sure subsequent git processes find correct worktree | |
227 | * if $GIT_WORK_TREE is set relative | |
228 | */ | |
229 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
230 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
231 | ||
044bbbcb | 232 | set_git_dir(make_relative_path(git_dir, work_tree)); |
354e6534 | 233 | initialized = 1; |
59f0f2f3 MH |
234 | } |
235 | ||
337e51ce | 236 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 237 | { |
337e51ce NTND |
238 | char repo_config[PATH_MAX+1]; |
239 | ||
240 | /* | |
241 | * git_config() can't be used here because it calls git_pathdup() | |
242 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
243 | * set git_dir to ".git". | |
244 | * | |
245 | * We are in gitdir setup, no git dir has been found useable yet. | |
246 | * Use a gentler version of git_config() to check if this repo | |
247 | * is a good one. | |
248 | */ | |
249 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
250 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
251 | if (GIT_REPO_VERSION < repository_format_version) { |
252 | if (!nongit_ok) | |
253 | die ("Expected git repo version <= %d, found %d", | |
254 | GIT_REPO_VERSION, repository_format_version); | |
255 | warning("Expected git repo version <= %d, found %d", | |
256 | GIT_REPO_VERSION, repository_format_version); | |
257 | warning("Please upgrade Git"); | |
258 | *nongit_ok = -1; | |
259 | return -1; | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
b44ebb19 LH |
264 | /* |
265 | * Try to read the location of the git directory from the .git file, | |
266 | * return path to git directory if found. | |
267 | */ | |
268 | const char *read_gitfile_gently(const char *path) | |
269 | { | |
270 | char *buf; | |
40c813e0 BK |
271 | char *dir; |
272 | const char *slash; | |
b44ebb19 LH |
273 | struct stat st; |
274 | int fd; | |
275 | size_t len; | |
276 | ||
277 | if (stat(path, &st)) | |
278 | return NULL; | |
279 | if (!S_ISREG(st.st_mode)) | |
280 | return NULL; | |
281 | fd = open(path, O_RDONLY); | |
282 | if (fd < 0) | |
d824cbba | 283 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
284 | buf = xmalloc(st.st_size + 1); |
285 | len = read_in_full(fd, buf, st.st_size); | |
286 | close(fd); | |
287 | if (len != st.st_size) | |
288 | die("Error reading %s", path); | |
289 | buf[len] = '\0'; | |
290 | if (prefixcmp(buf, "gitdir: ")) | |
291 | die("Invalid gitfile format: %s", path); | |
292 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
293 | len--; | |
294 | if (len < 9) | |
295 | die("No path in gitfile: %s", path); | |
296 | buf[len] = '\0'; | |
40c813e0 BK |
297 | dir = buf + 8; |
298 | ||
299 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
300 | size_t pathlen = slash+1 - path; | |
301 | size_t dirlen = pathlen + len - 8; | |
302 | dir = xmalloc(dirlen + 1); | |
303 | strncpy(dir, path, pathlen); | |
304 | strncpy(dir + pathlen, buf + 8, len - 8); | |
305 | dir[dirlen] = '\0'; | |
306 | free(buf); | |
307 | buf = dir; | |
308 | } | |
309 | ||
310 | if (!is_git_directory(dir)) | |
311 | die("Not a git repository: %s", dir); | |
312 | path = make_absolute_path(dir); | |
313 | ||
b44ebb19 LH |
314 | free(buf); |
315 | return path; | |
316 | } | |
317 | ||
e4e30347 | 318 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
b3f66fd3 NTND |
319 | char *cwd, int len, |
320 | int *nongit_ok) | |
e4e30347 | 321 | { |
b3f66fd3 NTND |
322 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
323 | const char *worktree; | |
324 | char *gitfile; | |
9b125da4 | 325 | int offset; |
e4e30347 JN |
326 | |
327 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
328 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 NTND |
329 | |
330 | gitfile = (char*)read_gitfile_gently(gitdirenv); | |
331 | if (gitfile) { | |
332 | gitfile = xstrdup(gitfile); | |
333 | gitdirenv = gitfile; | |
334 | } | |
335 | ||
e4e30347 JN |
336 | if (!is_git_directory(gitdirenv)) { |
337 | if (nongit_ok) { | |
338 | *nongit_ok = 1; | |
b3f66fd3 | 339 | free(gitfile); |
e4e30347 JN |
340 | return NULL; |
341 | } | |
342 | die("Not a git repository: '%s'", gitdirenv); | |
343 | } | |
b3f66fd3 NTND |
344 | |
345 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
346 | free(gitfile); | |
347 | return NULL; | |
e4e30347 | 348 | } |
b3f66fd3 NTND |
349 | |
350 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
351 | if (work_tree_env) | |
352 | set_git_work_tree(work_tree_env); | |
353 | else if (is_bare_repository_cfg > 0) { | |
354 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
355 | die("core.bare and core.worktree do not make sense"); | |
356 | ||
357 | /* #18, #26 */ | |
358 | set_git_dir(gitdirenv); | |
359 | free(gitfile); | |
e4e30347 | 360 | return NULL; |
b3f66fd3 NTND |
361 | } |
362 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
363 | if (is_absolute_path(git_work_tree_cfg)) | |
364 | set_git_work_tree(git_work_tree_cfg); | |
365 | else { | |
366 | char core_worktree[PATH_MAX]; | |
367 | if (chdir(gitdirenv)) | |
368 | die_errno("Could not chdir to '%s'", gitdirenv); | |
369 | if (chdir(git_work_tree_cfg)) | |
370 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
371 | if (!getcwd(core_worktree, PATH_MAX)) | |
372 | die_errno("Could not get directory '%s'", git_work_tree_cfg); | |
373 | if (chdir(cwd)) | |
374 | die_errno("Could not come back to cwd"); | |
375 | set_git_work_tree(core_worktree); | |
376 | } | |
377 | } | |
378 | else /* #2, #10 */ | |
379 | set_git_work_tree("."); | |
380 | ||
381 | /* set_git_work_tree() must have been called by now */ | |
382 | worktree = get_git_work_tree(); | |
383 | ||
384 | /* both get_git_work_tree() and cwd are already normalized */ | |
385 | if (!strcmp(cwd, worktree)) { /* cwd == worktree */ | |
386 | set_git_dir(gitdirenv); | |
387 | free(gitfile); | |
e4e30347 | 388 | return NULL; |
b3f66fd3 | 389 | } |
e4e30347 | 390 | |
9b125da4 NTND |
391 | offset = dir_inside_of(cwd, worktree); |
392 | if (offset >= 0) { /* cwd inside worktree? */ | |
b3f66fd3 NTND |
393 | set_git_dir(make_absolute_path(gitdirenv)); |
394 | if (chdir(worktree)) | |
395 | die_errno("Could not chdir to '%s'", worktree); | |
396 | cwd[len++] = '/'; | |
397 | cwd[len] = '\0'; | |
398 | free(gitfile); | |
9b125da4 | 399 | return cwd + offset; |
93a00542 | 400 | } |
b3f66fd3 NTND |
401 | |
402 | /* cwd outside worktree */ | |
403 | set_git_dir(gitdirenv); | |
404 | free(gitfile); | |
405 | return NULL; | |
93a00542 JN |
406 | } |
407 | ||
9951d3b3 NTND |
408 | static const char *setup_discovered_git_dir(const char *gitdir, |
409 | char *cwd, int offset, int len, | |
410 | int *nongit_ok) | |
98937bef | 411 | { |
9951d3b3 NTND |
412 | if (check_repository_format_gently(gitdir, nongit_ok)) |
413 | return NULL; | |
98937bef | 414 | |
4868b2ea JN |
415 | /* --work-tree is set without --git-dir; use discovered one */ |
416 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
417 | if (offset != len && !is_absolute_path(gitdir)) | |
418 | gitdir = xstrdup(make_absolute_path(gitdir)); | |
419 | if (chdir(cwd)) | |
420 | die_errno("Could not come back to cwd"); | |
421 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
422 | } | |
423 | ||
9951d3b3 NTND |
424 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
425 | if (is_bare_repository_cfg > 0) { | |
426 | set_git_dir(offset == len ? gitdir : make_absolute_path(gitdir)); | |
427 | if (chdir(cwd)) | |
428 | die_errno("Could not come back to cwd"); | |
98937bef | 429 | return NULL; |
9951d3b3 | 430 | } |
98937bef | 431 | |
9951d3b3 NTND |
432 | /* #0, #1, #5, #8, #9, #12, #13 */ |
433 | set_git_work_tree("."); | |
434 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
435 | set_git_dir(gitdir); | |
98937bef | 436 | inside_git_dir = 0; |
9951d3b3 | 437 | inside_work_tree = 1; |
98937bef NTND |
438 | if (offset == len) |
439 | return NULL; | |
440 | ||
441 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
442 | offset++; | |
443 | cwd[len++] = '/'; | |
444 | cwd[len] = 0; | |
445 | return cwd + offset; | |
446 | } | |
447 | ||
1cd8031b NTND |
448 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
449 | static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok) | |
68698da5 JN |
450 | { |
451 | int root_len; | |
452 | ||
1cd8031b NTND |
453 | if (check_repository_format_gently(".", nongit_ok)) |
454 | return NULL; | |
455 | ||
4868b2ea JN |
456 | /* --work-tree is set without --git-dir; use discovered one */ |
457 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
458 | const char *gitdir; | |
459 | ||
460 | gitdir = offset == len ? "." : xmemdupz(cwd, offset); | |
461 | if (chdir(cwd)) | |
462 | die_errno("Could not come back to cwd"); | |
463 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
464 | } | |
465 | ||
68698da5 | 466 | inside_git_dir = 1; |
1cd8031b | 467 | inside_work_tree = 0; |
68698da5 | 468 | if (offset != len) { |
8fc0ae80 NTND |
469 | if (chdir(cwd)) |
470 | die_errno("Cannot come back to cwd"); | |
68698da5 JN |
471 | root_len = offset_1st_component(cwd); |
472 | cwd[offset > root_len ? offset : root_len] = '\0'; | |
473 | set_git_dir(cwd); | |
337e51ce | 474 | } |
1cd8031b | 475 | else |
68698da5 | 476 | set_git_dir("."); |
68698da5 JN |
477 | return NULL; |
478 | } | |
479 | ||
f161edeb JN |
480 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
481 | { | |
482 | if (!nongit_ok) | |
483 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
484 | if (chdir(cwd)) | |
485 | die_errno("Cannot come back to cwd"); | |
486 | *nongit_ok = 1; | |
487 | return NULL; | |
488 | } | |
489 | ||
60c98d1e JN |
490 | static dev_t get_device_or_die(const char *path, const char *prefix) |
491 | { | |
492 | struct stat buf; | |
493 | if (stat(path, &buf)) | |
494 | die_errno("failed to stat '%s%s%s'", | |
495 | prefix ? prefix : "", | |
496 | prefix ? "/" : "", path); | |
497 | return buf.st_dev; | |
498 | } | |
499 | ||
e90fdc39 JS |
500 | /* |
501 | * We cannot decide in this function whether we are in the work tree or | |
502 | * not, since the config can only be read _after_ this function was called. | |
503 | */ | |
a60645f9 | 504 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 505 | { |
0454dd93 | 506 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
d288a700 | 507 | static char cwd[PATH_MAX+1]; |
9951d3b3 NTND |
508 | const char *gitdirenv, *ret; |
509 | char *gitfile; | |
98937bef | 510 | int len, offset, ceil_offset; |
c7d1d1b1 RH |
511 | dev_t current_device = 0; |
512 | int one_filesystem = 1; | |
d288a700 | 513 | |
af05d679 SG |
514 | /* |
515 | * Let's assume that we are in a git repository. | |
516 | * If it turns out later that we are somewhere else, the value will be | |
517 | * updated accordingly. | |
518 | */ | |
519 | if (nongit_ok) | |
520 | *nongit_ok = 0; | |
521 | ||
b3f66fd3 NTND |
522 | if (!getcwd(cwd, sizeof(cwd)-1)) |
523 | die_errno("Unable to read current working directory"); | |
524 | offset = len = strlen(cwd); | |
525 | ||
e90fdc39 JS |
526 | /* |
527 | * If GIT_DIR is set explicitly, we're not going | |
528 | * to do any discovery, but we still do repository | |
529 | * validation. | |
530 | */ | |
ad1a382f | 531 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 532 | if (gitdirenv) |
b3f66fd3 | 533 | return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok); |
d288a700 | 534 | |
0454dd93 | 535 | ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs); |
17d778e7 JH |
536 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
537 | ceil_offset = 1; | |
d288a700 | 538 | |
892c41b9 | 539 | /* |
e90fdc39 | 540 | * Test in the following order (relative to the cwd): |
b44ebb19 | 541 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
542 | * - .git/ |
543 | * - ./ (bare) | |
b44ebb19 | 544 | * - ../.git |
e90fdc39 JS |
545 | * - ../.git/ |
546 | * - ../ (bare) | |
547 | * - ../../.git/ | |
548 | * etc. | |
892c41b9 | 549 | */ |
cf87463e | 550 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e JN |
551 | if (one_filesystem) |
552 | current_device = get_device_or_die(".", NULL); | |
e90fdc39 | 553 | for (;;) { |
9951d3b3 NTND |
554 | gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); |
555 | if (gitfile) | |
556 | gitdirenv = gitfile = xstrdup(gitfile); | |
557 | else { | |
558 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
559 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
560 | } | |
561 | ||
562 | if (gitdirenv) { | |
563 | ret = setup_discovered_git_dir(gitdirenv, | |
564 | cwd, offset, len, | |
565 | nongit_ok); | |
566 | free(gitfile); | |
567 | return ret; | |
568 | } | |
569 | free(gitfile); | |
570 | ||
68698da5 | 571 | if (is_git_directory(".")) |
1cd8031b NTND |
572 | return setup_bare_git_dir(cwd, offset, len, nongit_ok); |
573 | ||
0454dd93 | 574 | while (--offset > ceil_offset && cwd[offset] != '/'); |
f161edeb JN |
575 | if (offset <= ceil_offset) |
576 | return setup_nongit(cwd, nongit_ok); | |
8030e442 | 577 | if (one_filesystem) { |
60c98d1e JN |
578 | dev_t parent_device = get_device_or_die("..", cwd); |
579 | if (parent_device != current_device) { | |
8030e442 LD |
580 | if (nongit_ok) { |
581 | if (chdir(cwd)) | |
582 | die_errno("Cannot come back to cwd"); | |
583 | *nongit_ok = 1; | |
584 | return NULL; | |
585 | } | |
586 | cwd[offset] = '\0'; | |
587 | die("Not a git repository (or any parent up to mount parent %s)\n" | |
cf87463e | 588 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); |
8030e442 LD |
589 | } |
590 | } | |
502ffe34 LD |
591 | if (chdir("..")) { |
592 | cwd[offset] = '\0'; | |
d824cbba | 593 | die_errno("Cannot change to '%s/..'", cwd); |
502ffe34 | 594 | } |
892c41b9 | 595 | } |
d288a700 | 596 | } |
5e7bfe25 | 597 | |
a60645f9 NTND |
598 | const char *setup_git_directory_gently(int *nongit_ok) |
599 | { | |
600 | const char *prefix; | |
601 | ||
602 | prefix = setup_git_directory_gently_1(nongit_ok); | |
f07d6a1a | 603 | if (startup_info) { |
a60645f9 | 604 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
605 | startup_info->prefix = prefix; |
606 | } | |
a60645f9 NTND |
607 | return prefix; |
608 | } | |
609 | ||
94df2506 JH |
610 | int git_config_perm(const char *var, const char *value) |
611 | { | |
06cbe855 HO |
612 | int i; |
613 | char *endptr; | |
614 | ||
615 | if (value == NULL) | |
616 | return PERM_GROUP; | |
617 | ||
618 | if (!strcmp(value, "umask")) | |
619 | return PERM_UMASK; | |
620 | if (!strcmp(value, "group")) | |
621 | return PERM_GROUP; | |
622 | if (!strcmp(value, "all") || | |
623 | !strcmp(value, "world") || | |
624 | !strcmp(value, "everybody")) | |
625 | return PERM_EVERYBODY; | |
626 | ||
627 | /* Parse octal numbers */ | |
628 | i = strtol(value, &endptr, 8); | |
629 | ||
630 | /* If not an octal number, maybe true/false? */ | |
631 | if (*endptr != 0) | |
632 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
633 | ||
634 | /* | |
635 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 636 | * a chmod value to restrict to. |
06cbe855 HO |
637 | */ |
638 | switch (i) { | |
639 | case PERM_UMASK: /* 0 */ | |
640 | return PERM_UMASK; | |
641 | case OLD_PERM_GROUP: /* 1 */ | |
642 | return PERM_GROUP; | |
643 | case OLD_PERM_EVERYBODY: /* 2 */ | |
644 | return PERM_EVERYBODY; | |
94df2506 | 645 | } |
06cbe855 HO |
646 | |
647 | /* A filemode value was given: 0xxx */ | |
648 | ||
649 | if ((i & 0600) != 0600) | |
650 | die("Problem with core.sharedRepository filemode value " | |
651 | "(0%.3o).\nThe owner of files must always have " | |
652 | "read and write permissions.", i); | |
653 | ||
654 | /* | |
655 | * Mask filemode value. Others can not get write permission. | |
656 | * x flags for directories are handled separately. | |
657 | */ | |
5a688fe4 | 658 | return -(i & 0666); |
94df2506 JH |
659 | } |
660 | ||
ef90d6d4 | 661 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 662 | { |
299726d5 JS |
663 | if (strcmp(var, "core.repositoryformatversion") == 0) |
664 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 665 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 666 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
667 | else if (strcmp(var, "core.bare") == 0) { |
668 | is_bare_repository_cfg = git_config_bool(var, value); | |
669 | if (is_bare_repository_cfg == 1) | |
670 | inside_work_tree = -1; | |
671 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
672 | if (!value) |
673 | return config_error_nonbool(var); | |
8e0f7003 | 674 | free(git_work_tree_cfg); |
e90fdc39 JS |
675 | git_work_tree_cfg = xstrdup(value); |
676 | inside_work_tree = -1; | |
677 | } | |
299726d5 | 678 | return 0; |
ab9cb76f JH |
679 | } |
680 | ||
681 | int check_repository_format(void) | |
682 | { | |
337e51ce | 683 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
684 | } |
685 | ||
e1e5ec86 CB |
686 | /* |
687 | * Returns the "prefix", a path to the current working directory | |
688 | * relative to the work tree root, or NULL, if the current working | |
689 | * directory is not a strict subdirectory of the work tree root. The | |
690 | * prefix always ends with a '/' character. | |
691 | */ | |
5e7bfe25 JH |
692 | const char *setup_git_directory(void) |
693 | { | |
b3f66fd3 | 694 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 695 | } |