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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 | ||
a6080a0a | 43 | /* |
4ca06608 JH |
44 | * Unlike prefix_path, this should be used if the named file does |
45 | * not have to interact with index entry; i.e. name of a random file | |
46 | * on the filesystem. | |
47 | */ | |
48 | const char *prefix_filename(const char *pfx, int pfx_len, const char *arg) | |
49 | { | |
50 | static char path[PATH_MAX]; | |
71064e3f | 51 | #ifndef WIN32 |
9e5f5d4c | 52 | if (!pfx_len || is_absolute_path(arg)) |
4ca06608 JH |
53 | return arg; |
54 | memcpy(path, pfx, pfx_len); | |
55 | strcpy(path + pfx_len, arg); | |
25fe217b JS |
56 | #else |
57 | char *p; | |
58 | /* don't add prefix to absolute paths, but still replace '\' by '/' */ | |
59 | if (is_absolute_path(arg)) | |
60 | pfx_len = 0; | |
9e5f5d4c | 61 | else if (pfx_len) |
25fe217b JS |
62 | memcpy(path, pfx, pfx_len); |
63 | strcpy(path + pfx_len, arg); | |
64 | for (p = path + pfx_len; *p; p++) | |
65 | if (*p == '\\') | |
66 | *p = '/'; | |
67 | #endif | |
4ca06608 JH |
68 | return path; |
69 | } | |
70 | ||
c6e8c800 JH |
71 | int check_filename(const char *prefix, const char *arg) |
72 | { | |
73 | const char *name; | |
74 | struct stat st; | |
75 | ||
76 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
77 | if (!lstat(name, &st)) | |
78 | return 1; /* file exists */ | |
79 | if (errno == ENOENT || errno == ENOTDIR) | |
80 | return 0; /* file does not exist */ | |
81 | die_errno("failed to stat '%s'", arg); | |
82 | } | |
83 | ||
009fee47 MM |
84 | static void NORETURN die_verify_filename(const char *prefix, const char *arg) |
85 | { | |
86 | unsigned char sha1[20]; | |
87 | unsigned mode; | |
88 | /* try a detailed diagnostic ... */ | |
89 | get_sha1_with_mode_1(arg, sha1, &mode, 0, prefix); | |
90 | /* ... or fall back the most general message. */ | |
91 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
92 | "Use '--' to separate paths from revisions", arg); | |
93 | ||
94 | } | |
95 | ||
e23d0b4a LT |
96 | /* |
97 | * Verify a filename that we got as an argument for a pathspec | |
98 | * entry. Note that a filename that begins with "-" never verifies | |
99 | * as true, because even if such a filename were to exist, we want | |
100 | * it to be preceded by the "--" marker (or we want the user to | |
101 | * use a format like "./-filename") | |
102 | */ | |
103 | void verify_filename(const char *prefix, const char *arg) | |
104 | { | |
e23d0b4a LT |
105 | if (*arg == '-') |
106 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 107 | if (check_filename(prefix, arg)) |
e23d0b4a | 108 | return; |
009fee47 | 109 | die_verify_filename(prefix, arg); |
e23d0b4a LT |
110 | } |
111 | ||
ea92f41f JH |
112 | /* |
113 | * Opposite of the above: the command line did not have -- marker | |
114 | * and we parsed the arg as a refname. It should not be interpretable | |
115 | * as a filename. | |
116 | */ | |
117 | void verify_non_filename(const char *prefix, const char *arg) | |
118 | { | |
7ae3df8c | 119 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 120 | return; |
ea92f41f JH |
121 | if (*arg == '-') |
122 | return; /* flag */ | |
c6e8c800 JH |
123 | if (!check_filename(prefix, arg)) |
124 | return; | |
125 | die("ambiguous argument '%s': both revision and filename\n" | |
126 | "Use '--' to separate filenames from revisions", arg); | |
ea92f41f JH |
127 | } |
128 | ||
6b5ee137 | 129 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 130 | { |
6b5ee137 | 131 | const char *entry = *pathspec; |
d089ebaa | 132 | const char **src, **dst; |
d288a700 LT |
133 | int prefixlen; |
134 | ||
f332726e LT |
135 | if (!prefix && !entry) |
136 | return NULL; | |
d288a700 LT |
137 | |
138 | if (!entry) { | |
139 | static const char *spec[2]; | |
140 | spec[0] = prefix; | |
141 | spec[1] = NULL; | |
142 | return spec; | |
143 | } | |
144 | ||
145 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
146 | src = pathspec; |
147 | dst = pathspec; | |
f332726e | 148 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa JH |
149 | while (*src) { |
150 | const char *p = prefix_path(prefix, prefixlen, *src); | |
62525ef7 | 151 | *(dst++) = p; |
d089ebaa JH |
152 | src++; |
153 | } | |
154 | *dst = NULL; | |
155 | if (!*pathspec) | |
156 | return NULL; | |
157 | return pathspec; | |
d288a700 LT |
158 | } |
159 | ||
5f5608bc | 160 | /* |
ad1a382f | 161 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 162 | * We want to see: |
5f5608bc | 163 | * |
790296fd | 164 | * - either an objects/ directory _or_ the proper |
5f5608bc | 165 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 166 | * - a refs/ directory |
8098a178 | 167 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
168 | * a proper "ref:", or a regular file HEAD that has a properly |
169 | * formatted sha1 object name. | |
5f5608bc | 170 | */ |
ad1a382f | 171 | static int is_git_directory(const char *suspect) |
5f5608bc | 172 | { |
ad1a382f SP |
173 | char path[PATH_MAX]; |
174 | size_t len = strlen(suspect); | |
175 | ||
3c9d0414 GB |
176 | if (PATH_MAX <= len + strlen("/objects")) |
177 | die("Too long path: %.*s", 60, suspect); | |
ad1a382f SP |
178 | strcpy(path, suspect); |
179 | if (getenv(DB_ENVIRONMENT)) { | |
180 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
181 | return 0; | |
182 | } | |
183 | else { | |
184 | strcpy(path + len, "/objects"); | |
185 | if (access(path, X_OK)) | |
186 | return 0; | |
187 | } | |
188 | ||
189 | strcpy(path + len, "/refs"); | |
190 | if (access(path, X_OK)) | |
8098a178 | 191 | return 0; |
ad1a382f SP |
192 | |
193 | strcpy(path + len, "/HEAD"); | |
c847f537 | 194 | if (validate_headref(path)) |
ad1a382f SP |
195 | return 0; |
196 | ||
8098a178 | 197 | return 1; |
5f5608bc LT |
198 | } |
199 | ||
68025633 JS |
200 | int is_inside_git_dir(void) |
201 | { | |
e90fdc39 JS |
202 | if (inside_git_dir < 0) |
203 | inside_git_dir = is_inside_dir(get_git_dir()); | |
204 | return inside_git_dir; | |
892c41b9 ML |
205 | } |
206 | ||
892c41b9 ML |
207 | int is_inside_work_tree(void) |
208 | { | |
e90fdc39 JS |
209 | if (inside_work_tree < 0) |
210 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
211 | return inside_work_tree; | |
892c41b9 ML |
212 | } |
213 | ||
f3fa1838 JH |
214 | void setup_work_tree(void) |
215 | { | |
354e6534 JS |
216 | const char *work_tree, *git_dir; |
217 | static int initialized = 0; | |
218 | ||
219 | if (initialized) | |
220 | return; | |
221 | work_tree = get_git_work_tree(); | |
222 | git_dir = get_git_dir(); | |
59f0f2f3 | 223 | if (!is_absolute_path(git_dir)) |
e2a57aac | 224 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
225 | if (!work_tree || chdir(work_tree)) |
226 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
227 | |
228 | /* | |
229 | * Make sure subsequent git processes find correct worktree | |
230 | * if $GIT_WORK_TREE is set relative | |
231 | */ | |
232 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
233 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
234 | ||
e2a57aac | 235 | set_git_dir(relative_path(git_dir, work_tree)); |
354e6534 | 236 | initialized = 1; |
59f0f2f3 MH |
237 | } |
238 | ||
337e51ce | 239 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 240 | { |
337e51ce NTND |
241 | char repo_config[PATH_MAX+1]; |
242 | ||
243 | /* | |
244 | * git_config() can't be used here because it calls git_pathdup() | |
245 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
246 | * set git_dir to ".git". | |
247 | * | |
248 | * We are in gitdir setup, no git dir has been found useable yet. | |
249 | * Use a gentler version of git_config() to check if this repo | |
250 | * is a good one. | |
251 | */ | |
252 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
253 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
254 | if (GIT_REPO_VERSION < repository_format_version) { |
255 | if (!nongit_ok) | |
256 | die ("Expected git repo version <= %d, found %d", | |
257 | GIT_REPO_VERSION, repository_format_version); | |
258 | warning("Expected git repo version <= %d, found %d", | |
259 | GIT_REPO_VERSION, repository_format_version); | |
260 | warning("Please upgrade Git"); | |
261 | *nongit_ok = -1; | |
262 | return -1; | |
263 | } | |
264 | return 0; | |
265 | } | |
266 | ||
b44ebb19 LH |
267 | /* |
268 | * Try to read the location of the git directory from the .git file, | |
269 | * return path to git directory if found. | |
270 | */ | |
271 | const char *read_gitfile_gently(const char *path) | |
272 | { | |
273 | char *buf; | |
40c813e0 BK |
274 | char *dir; |
275 | const char *slash; | |
b44ebb19 LH |
276 | struct stat st; |
277 | int fd; | |
278 | size_t len; | |
279 | ||
280 | if (stat(path, &st)) | |
281 | return NULL; | |
282 | if (!S_ISREG(st.st_mode)) | |
283 | return NULL; | |
284 | fd = open(path, O_RDONLY); | |
285 | if (fd < 0) | |
d824cbba | 286 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
287 | buf = xmalloc(st.st_size + 1); |
288 | len = read_in_full(fd, buf, st.st_size); | |
289 | close(fd); | |
290 | if (len != st.st_size) | |
291 | die("Error reading %s", path); | |
292 | buf[len] = '\0'; | |
293 | if (prefixcmp(buf, "gitdir: ")) | |
294 | die("Invalid gitfile format: %s", path); | |
295 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
296 | len--; | |
297 | if (len < 9) | |
298 | die("No path in gitfile: %s", path); | |
299 | buf[len] = '\0'; | |
40c813e0 BK |
300 | dir = buf + 8; |
301 | ||
302 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
303 | size_t pathlen = slash+1 - path; | |
304 | size_t dirlen = pathlen + len - 8; | |
305 | dir = xmalloc(dirlen + 1); | |
306 | strncpy(dir, path, pathlen); | |
307 | strncpy(dir + pathlen, buf + 8, len - 8); | |
308 | dir[dirlen] = '\0'; | |
309 | free(buf); | |
310 | buf = dir; | |
311 | } | |
312 | ||
313 | if (!is_git_directory(dir)) | |
314 | die("Not a git repository: %s", dir); | |
e2a57aac | 315 | path = real_path(dir); |
40c813e0 | 316 | |
b44ebb19 LH |
317 | free(buf); |
318 | return path; | |
319 | } | |
320 | ||
e4e30347 | 321 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
b3f66fd3 NTND |
322 | char *cwd, int len, |
323 | int *nongit_ok) | |
e4e30347 | 324 | { |
b3f66fd3 NTND |
325 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
326 | const char *worktree; | |
327 | char *gitfile; | |
e4e30347 JN |
328 | |
329 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
330 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 NTND |
331 | |
332 | gitfile = (char*)read_gitfile_gently(gitdirenv); | |
333 | if (gitfile) { | |
334 | gitfile = xstrdup(gitfile); | |
335 | gitdirenv = gitfile; | |
336 | } | |
337 | ||
e4e30347 JN |
338 | if (!is_git_directory(gitdirenv)) { |
339 | if (nongit_ok) { | |
340 | *nongit_ok = 1; | |
b3f66fd3 | 341 | free(gitfile); |
e4e30347 JN |
342 | return NULL; |
343 | } | |
344 | die("Not a git repository: '%s'", gitdirenv); | |
345 | } | |
b3f66fd3 NTND |
346 | |
347 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
348 | free(gitfile); | |
349 | return NULL; | |
e4e30347 | 350 | } |
b3f66fd3 NTND |
351 | |
352 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
353 | if (work_tree_env) | |
354 | set_git_work_tree(work_tree_env); | |
355 | else if (is_bare_repository_cfg > 0) { | |
356 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
357 | die("core.bare and core.worktree do not make sense"); | |
358 | ||
359 | /* #18, #26 */ | |
360 | set_git_dir(gitdirenv); | |
361 | free(gitfile); | |
e4e30347 | 362 | return NULL; |
b3f66fd3 NTND |
363 | } |
364 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
365 | if (is_absolute_path(git_work_tree_cfg)) | |
366 | set_git_work_tree(git_work_tree_cfg); | |
367 | else { | |
368 | char core_worktree[PATH_MAX]; | |
369 | if (chdir(gitdirenv)) | |
370 | die_errno("Could not chdir to '%s'", gitdirenv); | |
371 | if (chdir(git_work_tree_cfg)) | |
372 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
373 | if (!getcwd(core_worktree, PATH_MAX)) | |
374 | die_errno("Could not get directory '%s'", git_work_tree_cfg); | |
375 | if (chdir(cwd)) | |
376 | die_errno("Could not come back to cwd"); | |
377 | set_git_work_tree(core_worktree); | |
378 | } | |
379 | } | |
380 | else /* #2, #10 */ | |
381 | set_git_work_tree("."); | |
382 | ||
383 | /* set_git_work_tree() must have been called by now */ | |
384 | worktree = get_git_work_tree(); | |
385 | ||
386 | /* both get_git_work_tree() and cwd are already normalized */ | |
387 | if (!strcmp(cwd, worktree)) { /* cwd == worktree */ | |
388 | set_git_dir(gitdirenv); | |
389 | free(gitfile); | |
e4e30347 | 390 | return NULL; |
b3f66fd3 | 391 | } |
e4e30347 | 392 | |
b3f66fd3 NTND |
393 | if (!prefixcmp(cwd, worktree) && |
394 | cwd[strlen(worktree)] == '/') { /* cwd inside worktree */ | |
e2a57aac | 395 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
396 | if (chdir(worktree)) |
397 | die_errno("Could not chdir to '%s'", worktree); | |
398 | cwd[len++] = '/'; | |
399 | cwd[len] = '\0'; | |
400 | free(gitfile); | |
401 | return cwd + strlen(worktree) + 1; | |
93a00542 | 402 | } |
b3f66fd3 NTND |
403 | |
404 | /* cwd outside worktree */ | |
405 | set_git_dir(gitdirenv); | |
406 | free(gitfile); | |
407 | return NULL; | |
93a00542 JN |
408 | } |
409 | ||
9951d3b3 NTND |
410 | static const char *setup_discovered_git_dir(const char *gitdir, |
411 | char *cwd, int offset, int len, | |
412 | int *nongit_ok) | |
98937bef | 413 | { |
9951d3b3 NTND |
414 | if (check_repository_format_gently(gitdir, nongit_ok)) |
415 | return NULL; | |
98937bef | 416 | |
4868b2ea JN |
417 | /* --work-tree is set without --git-dir; use discovered one */ |
418 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
419 | if (offset != len && !is_absolute_path(gitdir)) | |
e2a57aac | 420 | gitdir = xstrdup(real_path(gitdir)); |
4868b2ea JN |
421 | if (chdir(cwd)) |
422 | die_errno("Could not come back to cwd"); | |
423 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
424 | } | |
425 | ||
9951d3b3 NTND |
426 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
427 | if (is_bare_repository_cfg > 0) { | |
e2a57aac | 428 | set_git_dir(offset == len ? gitdir : real_path(gitdir)); |
9951d3b3 NTND |
429 | if (chdir(cwd)) |
430 | die_errno("Could not come back to cwd"); | |
98937bef | 431 | return NULL; |
9951d3b3 | 432 | } |
98937bef | 433 | |
9951d3b3 NTND |
434 | /* #0, #1, #5, #8, #9, #12, #13 */ |
435 | set_git_work_tree("."); | |
436 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
437 | set_git_dir(gitdir); | |
98937bef | 438 | inside_git_dir = 0; |
9951d3b3 | 439 | inside_work_tree = 1; |
98937bef NTND |
440 | if (offset == len) |
441 | return NULL; | |
442 | ||
443 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
444 | offset++; | |
445 | cwd[len++] = '/'; | |
446 | cwd[len] = 0; | |
447 | return cwd + offset; | |
448 | } | |
449 | ||
1cd8031b NTND |
450 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
451 | static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok) | |
68698da5 JN |
452 | { |
453 | int root_len; | |
454 | ||
1cd8031b NTND |
455 | if (check_repository_format_gently(".", nongit_ok)) |
456 | return NULL; | |
457 | ||
4868b2ea JN |
458 | /* --work-tree is set without --git-dir; use discovered one */ |
459 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
460 | const char *gitdir; | |
461 | ||
462 | gitdir = offset == len ? "." : xmemdupz(cwd, offset); | |
463 | if (chdir(cwd)) | |
464 | die_errno("Could not come back to cwd"); | |
465 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
466 | } | |
467 | ||
68698da5 | 468 | inside_git_dir = 1; |
1cd8031b | 469 | inside_work_tree = 0; |
68698da5 | 470 | if (offset != len) { |
8fc0ae80 NTND |
471 | if (chdir(cwd)) |
472 | die_errno("Cannot come back to cwd"); | |
68698da5 JN |
473 | root_len = offset_1st_component(cwd); |
474 | cwd[offset > root_len ? offset : root_len] = '\0'; | |
475 | set_git_dir(cwd); | |
337e51ce | 476 | } |
1cd8031b | 477 | else |
68698da5 | 478 | set_git_dir("."); |
68698da5 JN |
479 | return NULL; |
480 | } | |
481 | ||
f161edeb JN |
482 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
483 | { | |
484 | if (!nongit_ok) | |
485 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
486 | if (chdir(cwd)) | |
487 | die_errno("Cannot come back to cwd"); | |
488 | *nongit_ok = 1; | |
489 | return NULL; | |
490 | } | |
491 | ||
60c98d1e JN |
492 | static dev_t get_device_or_die(const char *path, const char *prefix) |
493 | { | |
494 | struct stat buf; | |
495 | if (stat(path, &buf)) | |
496 | die_errno("failed to stat '%s%s%s'", | |
497 | prefix ? prefix : "", | |
498 | prefix ? "/" : "", path); | |
499 | return buf.st_dev; | |
500 | } | |
501 | ||
e90fdc39 JS |
502 | /* |
503 | * We cannot decide in this function whether we are in the work tree or | |
504 | * not, since the config can only be read _after_ this function was called. | |
505 | */ | |
a60645f9 | 506 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 507 | { |
0454dd93 | 508 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
d288a700 | 509 | static char cwd[PATH_MAX+1]; |
9951d3b3 NTND |
510 | const char *gitdirenv, *ret; |
511 | char *gitfile; | |
98937bef | 512 | int len, offset, ceil_offset; |
c7d1d1b1 RH |
513 | dev_t current_device = 0; |
514 | int one_filesystem = 1; | |
d288a700 | 515 | |
af05d679 SG |
516 | /* |
517 | * Let's assume that we are in a git repository. | |
518 | * If it turns out later that we are somewhere else, the value will be | |
519 | * updated accordingly. | |
520 | */ | |
521 | if (nongit_ok) | |
522 | *nongit_ok = 0; | |
523 | ||
b3f66fd3 NTND |
524 | if (!getcwd(cwd, sizeof(cwd)-1)) |
525 | die_errno("Unable to read current working directory"); | |
526 | offset = len = strlen(cwd); | |
527 | ||
e90fdc39 JS |
528 | /* |
529 | * If GIT_DIR is set explicitly, we're not going | |
530 | * to do any discovery, but we still do repository | |
531 | * validation. | |
532 | */ | |
ad1a382f | 533 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 534 | if (gitdirenv) |
b3f66fd3 | 535 | return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok); |
d288a700 | 536 | |
0454dd93 | 537 | ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs); |
17d778e7 JH |
538 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
539 | ceil_offset = 1; | |
d288a700 | 540 | |
892c41b9 | 541 | /* |
e90fdc39 | 542 | * Test in the following order (relative to the cwd): |
b44ebb19 | 543 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
544 | * - .git/ |
545 | * - ./ (bare) | |
b44ebb19 | 546 | * - ../.git |
e90fdc39 JS |
547 | * - ../.git/ |
548 | * - ../ (bare) | |
549 | * - ../../.git/ | |
550 | * etc. | |
892c41b9 | 551 | */ |
cf87463e | 552 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e JN |
553 | if (one_filesystem) |
554 | current_device = get_device_or_die(".", NULL); | |
e90fdc39 | 555 | for (;;) { |
9951d3b3 NTND |
556 | gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); |
557 | if (gitfile) | |
558 | gitdirenv = gitfile = xstrdup(gitfile); | |
559 | else { | |
560 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
561 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
562 | } | |
563 | ||
564 | if (gitdirenv) { | |
565 | ret = setup_discovered_git_dir(gitdirenv, | |
566 | cwd, offset, len, | |
567 | nongit_ok); | |
568 | free(gitfile); | |
569 | return ret; | |
570 | } | |
571 | free(gitfile); | |
572 | ||
68698da5 | 573 | if (is_git_directory(".")) |
1cd8031b NTND |
574 | return setup_bare_git_dir(cwd, offset, len, nongit_ok); |
575 | ||
0454dd93 | 576 | while (--offset > ceil_offset && cwd[offset] != '/'); |
f161edeb JN |
577 | if (offset <= ceil_offset) |
578 | return setup_nongit(cwd, nongit_ok); | |
8030e442 | 579 | if (one_filesystem) { |
60c98d1e JN |
580 | dev_t parent_device = get_device_or_die("..", cwd); |
581 | if (parent_device != current_device) { | |
8030e442 LD |
582 | if (nongit_ok) { |
583 | if (chdir(cwd)) | |
584 | die_errno("Cannot come back to cwd"); | |
585 | *nongit_ok = 1; | |
586 | return NULL; | |
587 | } | |
588 | cwd[offset] = '\0'; | |
589 | die("Not a git repository (or any parent up to mount parent %s)\n" | |
cf87463e | 590 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); |
8030e442 LD |
591 | } |
592 | } | |
502ffe34 LD |
593 | if (chdir("..")) { |
594 | cwd[offset] = '\0'; | |
d824cbba | 595 | die_errno("Cannot change to '%s/..'", cwd); |
502ffe34 | 596 | } |
892c41b9 | 597 | } |
d288a700 | 598 | } |
5e7bfe25 | 599 | |
a60645f9 NTND |
600 | const char *setup_git_directory_gently(int *nongit_ok) |
601 | { | |
602 | const char *prefix; | |
603 | ||
604 | prefix = setup_git_directory_gently_1(nongit_ok); | |
f07d6a1a | 605 | if (startup_info) { |
a60645f9 | 606 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
607 | startup_info->prefix = prefix; |
608 | } | |
a60645f9 NTND |
609 | return prefix; |
610 | } | |
611 | ||
94df2506 JH |
612 | int git_config_perm(const char *var, const char *value) |
613 | { | |
06cbe855 HO |
614 | int i; |
615 | char *endptr; | |
616 | ||
617 | if (value == NULL) | |
618 | return PERM_GROUP; | |
619 | ||
620 | if (!strcmp(value, "umask")) | |
621 | return PERM_UMASK; | |
622 | if (!strcmp(value, "group")) | |
623 | return PERM_GROUP; | |
624 | if (!strcmp(value, "all") || | |
625 | !strcmp(value, "world") || | |
626 | !strcmp(value, "everybody")) | |
627 | return PERM_EVERYBODY; | |
628 | ||
629 | /* Parse octal numbers */ | |
630 | i = strtol(value, &endptr, 8); | |
631 | ||
632 | /* If not an octal number, maybe true/false? */ | |
633 | if (*endptr != 0) | |
634 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
635 | ||
636 | /* | |
637 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 638 | * a chmod value to restrict to. |
06cbe855 HO |
639 | */ |
640 | switch (i) { | |
641 | case PERM_UMASK: /* 0 */ | |
642 | return PERM_UMASK; | |
643 | case OLD_PERM_GROUP: /* 1 */ | |
644 | return PERM_GROUP; | |
645 | case OLD_PERM_EVERYBODY: /* 2 */ | |
646 | return PERM_EVERYBODY; | |
94df2506 | 647 | } |
06cbe855 HO |
648 | |
649 | /* A filemode value was given: 0xxx */ | |
650 | ||
651 | if ((i & 0600) != 0600) | |
652 | die("Problem with core.sharedRepository filemode value " | |
653 | "(0%.3o).\nThe owner of files must always have " | |
654 | "read and write permissions.", i); | |
655 | ||
656 | /* | |
657 | * Mask filemode value. Others can not get write permission. | |
658 | * x flags for directories are handled separately. | |
659 | */ | |
5a688fe4 | 660 | return -(i & 0666); |
94df2506 JH |
661 | } |
662 | ||
ef90d6d4 | 663 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 664 | { |
299726d5 JS |
665 | if (strcmp(var, "core.repositoryformatversion") == 0) |
666 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 667 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 668 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
669 | else if (strcmp(var, "core.bare") == 0) { |
670 | is_bare_repository_cfg = git_config_bool(var, value); | |
671 | if (is_bare_repository_cfg == 1) | |
672 | inside_work_tree = -1; | |
673 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
674 | if (!value) |
675 | return config_error_nonbool(var); | |
8e0f7003 | 676 | free(git_work_tree_cfg); |
e90fdc39 JS |
677 | git_work_tree_cfg = xstrdup(value); |
678 | inside_work_tree = -1; | |
679 | } | |
299726d5 | 680 | return 0; |
ab9cb76f JH |
681 | } |
682 | ||
683 | int check_repository_format(void) | |
684 | { | |
337e51ce | 685 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
686 | } |
687 | ||
e1e5ec86 CB |
688 | /* |
689 | * Returns the "prefix", a path to the current working directory | |
690 | * relative to the work tree root, or NULL, if the current working | |
691 | * directory is not a strict subdirectory of the work tree root. The | |
692 | * prefix always ends with a '/' character. | |
693 | */ | |
5e7bfe25 JH |
694 | const char *setup_git_directory(void) |
695 | { | |
b3f66fd3 | 696 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 697 | } |