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Commit | Line | Data |
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d288a700 | 1 | #include "cache.h" |
e90fdc39 | 2 | #include "dir.h" |
31171d9e | 3 | #include "string-list.h" |
e90fdc39 JS |
4 | |
5 | static int inside_git_dir = -1; | |
6 | static int inside_work_tree = -1; | |
d288a700 | 7 | |
ddc2a628 MEW |
8 | /* |
9 | * The input parameter must contain an absolute path, and it must already be | |
10 | * normalized. | |
11 | * | |
12 | * Find the part of an absolute path that lies inside the work tree by | |
13 | * dereferencing symlinks outside the work tree, for example: | |
14 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
15 | * /dir/file (work tree is /) -> dir/file | |
16 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
17 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
18 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
19 | */ | |
20 | static int abspath_part_inside_repo(char *path) | |
21 | { | |
22 | size_t len; | |
23 | size_t wtlen; | |
24 | char *path0; | |
25 | int off; | |
26 | const char *work_tree = get_git_work_tree(); | |
27 | ||
28 | if (!work_tree) | |
29 | return -1; | |
30 | wtlen = strlen(work_tree); | |
31 | len = strlen(path); | |
6127ff63 | 32 | off = offset_1st_component(path); |
ddc2a628 MEW |
33 | |
34 | /* check if work tree is already the prefix */ | |
35 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
36 | if (path[wtlen] == '/') { | |
37 | memmove(path, path + wtlen + 1, len - wtlen); | |
38 | return 0; | |
39 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
40 | /* work tree is the root, or the whole path */ | |
41 | memmove(path, path + wtlen, len - wtlen + 1); | |
42 | return 0; | |
43 | } | |
44 | /* work tree might match beginning of a symlink to work tree */ | |
45 | off = wtlen; | |
46 | } | |
47 | path0 = path; | |
6127ff63 | 48 | path += off; |
ddc2a628 MEW |
49 | |
50 | /* check each '/'-terminated level */ | |
51 | while (*path) { | |
52 | path++; | |
53 | if (*path == '/') { | |
54 | *path = '\0'; | |
55 | if (strcmp(real_path(path0), work_tree) == 0) { | |
56 | memmove(path0, path + 1, len - (path - path0)); | |
57 | return 0; | |
58 | } | |
59 | *path = '/'; | |
60 | } | |
61 | } | |
62 | ||
63 | /* check whole path */ | |
64 | if (strcmp(real_path(path0), work_tree) == 0) { | |
65 | *path0 = '\0'; | |
66 | return 0; | |
67 | } | |
68 | ||
69 | return -1; | |
70 | } | |
71 | ||
645a29c4 NTND |
72 | /* |
73 | * Normalize "path", prepending the "prefix" for relative paths. If | |
74 | * remaining_prefix is not NULL, return the actual prefix still | |
75 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
76 | * | |
77 | * foo -> sub1/sub2/foo (full prefix) | |
78 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
79 | * ../../bar -> bar (no remaining prefix) | |
80 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
81 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
82 | */ | |
83 | char *prefix_path_gently(const char *prefix, int len, | |
84 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
85 | { |
86 | const char *orig = path; | |
18e051a3 CMAB |
87 | char *sanitized; |
88 | if (is_absolute_path(orig)) { | |
655ee9ea | 89 | sanitized = xmalloc(strlen(path) + 1); |
645a29c4 NTND |
90 | if (remaining_prefix) |
91 | *remaining_prefix = 0; | |
655ee9ea MEW |
92 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
93 | free(sanitized); | |
94 | return NULL; | |
95 | } | |
96 | if (abspath_part_inside_repo(sanitized)) { | |
97 | free(sanitized); | |
98 | return NULL; | |
99 | } | |
18e051a3 CMAB |
100 | } else { |
101 | sanitized = xmalloc(len + strlen(path) + 1); | |
d089ebaa JH |
102 | if (len) |
103 | memcpy(sanitized, prefix, len); | |
104 | strcpy(sanitized + len, path); | |
645a29c4 NTND |
105 | if (remaining_prefix) |
106 | *remaining_prefix = len; | |
655ee9ea | 107 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
108 | free(sanitized); |
109 | return NULL; | |
d089ebaa | 110 | } |
d089ebaa JH |
111 | } |
112 | return sanitized; | |
f332726e LT |
113 | } |
114 | ||
546e0fd9 JK |
115 | char *prefix_path(const char *prefix, int len, const char *path) |
116 | { | |
645a29c4 | 117 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
118 | if (!r) |
119 | die("'%s' is outside repository", path); | |
120 | return r; | |
121 | } | |
122 | ||
123 | int path_inside_repo(const char *prefix, const char *path) | |
124 | { | |
125 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 126 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
127 | if (r) { |
128 | free(r); | |
129 | return 1; | |
130 | } | |
131 | return 0; | |
132 | } | |
133 | ||
c6e8c800 JH |
134 | int check_filename(const char *prefix, const char *arg) |
135 | { | |
136 | const char *name; | |
137 | struct stat st; | |
138 | ||
59556548 | 139 | if (starts_with(arg, ":/")) { |
4db86e8b NTND |
140 | if (arg[2] == '\0') /* ":/" is root dir, always exists */ |
141 | return 1; | |
142 | name = arg + 2; | |
143 | } else if (prefix) | |
144 | name = prefix_filename(prefix, strlen(prefix), arg); | |
145 | else | |
146 | name = arg; | |
c6e8c800 JH |
147 | if (!lstat(name, &st)) |
148 | return 1; /* file exists */ | |
149 | if (errno == ENOENT || errno == ENOTDIR) | |
150 | return 0; /* file does not exist */ | |
151 | die_errno("failed to stat '%s'", arg); | |
152 | } | |
153 | ||
023e37c3 MM |
154 | static void NORETURN die_verify_filename(const char *prefix, |
155 | const char *arg, | |
156 | int diagnose_misspelt_rev) | |
009fee47 | 157 | { |
023e37c3 MM |
158 | if (!diagnose_misspelt_rev) |
159 | die("%s: no such path in the working tree.\n" | |
4d4b5739 | 160 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally.", |
023e37c3 | 161 | arg); |
0e539dca JH |
162 | /* |
163 | * Saying "'(icase)foo' does not exist in the index" when the | |
164 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
165 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 166 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
167 | */ |
168 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 169 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 170 | |
009fee47 MM |
171 | /* ... or fall back the most general message. */ |
172 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
4d4b5739 MM |
173 | "Use '--' to separate paths from revisions, like this:\n" |
174 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
009fee47 MM |
175 | |
176 | } | |
177 | ||
e23d0b4a LT |
178 | /* |
179 | * Verify a filename that we got as an argument for a pathspec | |
180 | * entry. Note that a filename that begins with "-" never verifies | |
181 | * as true, because even if such a filename were to exist, we want | |
182 | * it to be preceded by the "--" marker (or we want the user to | |
183 | * use a format like "./-filename") | |
023e37c3 MM |
184 | * |
185 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
186 | * diagnosis when dying upon finding that "name" is not a pathname. | |
187 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
188 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
189 | * will only complain about an inexisting file. | |
190 | * | |
191 | * This function is typically called to check that a "file or rev" | |
192 | * argument is unambiguous. In this case, the caller will want | |
193 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
194 | * argument (which could have been a revision), and | |
195 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
196 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 197 | */ |
023e37c3 MM |
198 | void verify_filename(const char *prefix, |
199 | const char *arg, | |
200 | int diagnose_misspelt_rev) | |
e23d0b4a | 201 | { |
e23d0b4a LT |
202 | if (*arg == '-') |
203 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 204 | if (check_filename(prefix, arg)) |
e23d0b4a | 205 | return; |
023e37c3 | 206 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
207 | } |
208 | ||
ea92f41f JH |
209 | /* |
210 | * Opposite of the above: the command line did not have -- marker | |
211 | * and we parsed the arg as a refname. It should not be interpretable | |
212 | * as a filename. | |
213 | */ | |
214 | void verify_non_filename(const char *prefix, const char *arg) | |
215 | { | |
7ae3df8c | 216 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 217 | return; |
ea92f41f JH |
218 | if (*arg == '-') |
219 | return; /* flag */ | |
c6e8c800 JH |
220 | if (!check_filename(prefix, arg)) |
221 | return; | |
222 | die("ambiguous argument '%s': both revision and filename\n" | |
4d4b5739 MM |
223 | "Use '--' to separate paths from revisions, like this:\n" |
224 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
ea92f41f JH |
225 | } |
226 | ||
d288a700 | 227 | |
5f5608bc | 228 | /* |
ad1a382f | 229 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 230 | * We want to see: |
5f5608bc | 231 | * |
790296fd | 232 | * - either an objects/ directory _or_ the proper |
5f5608bc | 233 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 234 | * - a refs/ directory |
8098a178 | 235 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
236 | * a proper "ref:", or a regular file HEAD that has a properly |
237 | * formatted sha1 object name. | |
5f5608bc | 238 | */ |
b3256eb8 | 239 | int is_git_directory(const char *suspect) |
5f5608bc | 240 | { |
1d186b6f NTND |
241 | struct strbuf path = STRBUF_INIT; |
242 | int ret = 0; | |
243 | size_t len; | |
ad1a382f | 244 | |
1d186b6f NTND |
245 | strbuf_addstr(&path, suspect); |
246 | len = path.len; | |
ad1a382f SP |
247 | if (getenv(DB_ENVIRONMENT)) { |
248 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 249 | goto done; |
ad1a382f SP |
250 | } |
251 | else { | |
1d186b6f NTND |
252 | strbuf_addstr(&path, "/objects"); |
253 | if (access(path.buf, X_OK)) | |
254 | goto done; | |
ad1a382f SP |
255 | } |
256 | ||
1d186b6f NTND |
257 | strbuf_setlen(&path, len); |
258 | strbuf_addstr(&path, "/refs"); | |
259 | if (access(path.buf, X_OK)) | |
260 | goto done; | |
ad1a382f | 261 | |
1d186b6f NTND |
262 | strbuf_setlen(&path, len); |
263 | strbuf_addstr(&path, "/HEAD"); | |
264 | if (validate_headref(path.buf)) | |
265 | goto done; | |
ad1a382f | 266 | |
1d186b6f NTND |
267 | ret = 1; |
268 | done: | |
269 | strbuf_release(&path); | |
270 | return ret; | |
5f5608bc LT |
271 | } |
272 | ||
68025633 JS |
273 | int is_inside_git_dir(void) |
274 | { | |
e90fdc39 JS |
275 | if (inside_git_dir < 0) |
276 | inside_git_dir = is_inside_dir(get_git_dir()); | |
277 | return inside_git_dir; | |
892c41b9 ML |
278 | } |
279 | ||
892c41b9 ML |
280 | int is_inside_work_tree(void) |
281 | { | |
e90fdc39 JS |
282 | if (inside_work_tree < 0) |
283 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
284 | return inside_work_tree; | |
892c41b9 ML |
285 | } |
286 | ||
f3fa1838 JH |
287 | void setup_work_tree(void) |
288 | { | |
354e6534 JS |
289 | const char *work_tree, *git_dir; |
290 | static int initialized = 0; | |
291 | ||
292 | if (initialized) | |
293 | return; | |
294 | work_tree = get_git_work_tree(); | |
295 | git_dir = get_git_dir(); | |
59f0f2f3 | 296 | if (!is_absolute_path(git_dir)) |
e2a57aac | 297 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
298 | if (!work_tree || chdir(work_tree)) |
299 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
300 | |
301 | /* | |
302 | * Make sure subsequent git processes find correct worktree | |
303 | * if $GIT_WORK_TREE is set relative | |
304 | */ | |
305 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
306 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
307 | ||
41894ae3 | 308 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 309 | initialized = 1; |
59f0f2f3 MH |
310 | } |
311 | ||
337e51ce | 312 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 313 | { |
337e51ce NTND |
314 | char repo_config[PATH_MAX+1]; |
315 | ||
316 | /* | |
317 | * git_config() can't be used here because it calls git_pathdup() | |
318 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
319 | * set git_dir to ".git". | |
320 | * | |
321 | * We are in gitdir setup, no git dir has been found useable yet. | |
322 | * Use a gentler version of git_config() to check if this repo | |
323 | * is a good one. | |
324 | */ | |
325 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
326 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
327 | if (GIT_REPO_VERSION < repository_format_version) { |
328 | if (!nongit_ok) | |
329 | die ("Expected git repo version <= %d, found %d", | |
330 | GIT_REPO_VERSION, repository_format_version); | |
331 | warning("Expected git repo version <= %d, found %d", | |
332 | GIT_REPO_VERSION, repository_format_version); | |
333 | warning("Please upgrade Git"); | |
334 | *nongit_ok = -1; | |
335 | return -1; | |
336 | } | |
337 | return 0; | |
338 | } | |
339 | ||
b44ebb19 LH |
340 | /* |
341 | * Try to read the location of the git directory from the .git file, | |
342 | * return path to git directory if found. | |
343 | */ | |
13d6ec91 | 344 | const char *read_gitfile(const char *path) |
b44ebb19 LH |
345 | { |
346 | char *buf; | |
40c813e0 BK |
347 | char *dir; |
348 | const char *slash; | |
b44ebb19 LH |
349 | struct stat st; |
350 | int fd; | |
b1905aea | 351 | ssize_t len; |
b44ebb19 LH |
352 | |
353 | if (stat(path, &st)) | |
354 | return NULL; | |
355 | if (!S_ISREG(st.st_mode)) | |
356 | return NULL; | |
357 | fd = open(path, O_RDONLY); | |
358 | if (fd < 0) | |
d824cbba | 359 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
360 | buf = xmalloc(st.st_size + 1); |
361 | len = read_in_full(fd, buf, st.st_size); | |
362 | close(fd); | |
363 | if (len != st.st_size) | |
364 | die("Error reading %s", path); | |
365 | buf[len] = '\0'; | |
59556548 | 366 | if (!starts_with(buf, "gitdir: ")) |
b44ebb19 LH |
367 | die("Invalid gitfile format: %s", path); |
368 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
369 | len--; | |
370 | if (len < 9) | |
371 | die("No path in gitfile: %s", path); | |
372 | buf[len] = '\0'; | |
40c813e0 BK |
373 | dir = buf + 8; |
374 | ||
375 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
376 | size_t pathlen = slash+1 - path; | |
377 | size_t dirlen = pathlen + len - 8; | |
378 | dir = xmalloc(dirlen + 1); | |
379 | strncpy(dir, path, pathlen); | |
380 | strncpy(dir + pathlen, buf + 8, len - 8); | |
381 | dir[dirlen] = '\0'; | |
382 | free(buf); | |
383 | buf = dir; | |
384 | } | |
385 | ||
386 | if (!is_git_directory(dir)) | |
387 | die("Not a git repository: %s", dir); | |
e2a57aac | 388 | path = real_path(dir); |
40c813e0 | 389 | |
b44ebb19 LH |
390 | free(buf); |
391 | return path; | |
392 | } | |
393 | ||
e4e30347 | 394 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 395 | struct strbuf *cwd, |
b3f66fd3 | 396 | int *nongit_ok) |
e4e30347 | 397 | { |
b3f66fd3 NTND |
398 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
399 | const char *worktree; | |
400 | char *gitfile; | |
9b125da4 | 401 | int offset; |
e4e30347 JN |
402 | |
403 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
404 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 405 | |
13d6ec91 | 406 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
407 | if (gitfile) { |
408 | gitfile = xstrdup(gitfile); | |
409 | gitdirenv = gitfile; | |
410 | } | |
411 | ||
e4e30347 JN |
412 | if (!is_git_directory(gitdirenv)) { |
413 | if (nongit_ok) { | |
414 | *nongit_ok = 1; | |
b3f66fd3 | 415 | free(gitfile); |
e4e30347 JN |
416 | return NULL; |
417 | } | |
418 | die("Not a git repository: '%s'", gitdirenv); | |
419 | } | |
b3f66fd3 NTND |
420 | |
421 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
422 | free(gitfile); | |
423 | return NULL; | |
e4e30347 | 424 | } |
b3f66fd3 NTND |
425 | |
426 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
427 | if (work_tree_env) | |
428 | set_git_work_tree(work_tree_env); | |
429 | else if (is_bare_repository_cfg > 0) { | |
430 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
431 | die("core.bare and core.worktree do not make sense"); | |
432 | ||
433 | /* #18, #26 */ | |
434 | set_git_dir(gitdirenv); | |
435 | free(gitfile); | |
e4e30347 | 436 | return NULL; |
b3f66fd3 NTND |
437 | } |
438 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
439 | if (is_absolute_path(git_work_tree_cfg)) | |
440 | set_git_work_tree(git_work_tree_cfg); | |
441 | else { | |
56b9f6e7 | 442 | char *core_worktree; |
b3f66fd3 NTND |
443 | if (chdir(gitdirenv)) |
444 | die_errno("Could not chdir to '%s'", gitdirenv); | |
445 | if (chdir(git_work_tree_cfg)) | |
446 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 447 | core_worktree = xgetcwd(); |
7333ed17 | 448 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
449 | die_errno("Could not come back to cwd"); |
450 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 451 | free(core_worktree); |
b3f66fd3 NTND |
452 | } |
453 | } | |
2cd83d10 JK |
454 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
455 | /* #16d */ | |
456 | set_git_dir(gitdirenv); | |
457 | free(gitfile); | |
458 | return NULL; | |
459 | } | |
b3f66fd3 NTND |
460 | else /* #2, #10 */ |
461 | set_git_work_tree("."); | |
462 | ||
463 | /* set_git_work_tree() must have been called by now */ | |
464 | worktree = get_git_work_tree(); | |
465 | ||
466 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 467 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
468 | set_git_dir(gitdirenv); |
469 | free(gitfile); | |
e4e30347 | 470 | return NULL; |
b3f66fd3 | 471 | } |
e4e30347 | 472 | |
7333ed17 | 473 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 474 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 475 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
476 | if (chdir(worktree)) |
477 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 478 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 479 | free(gitfile); |
7333ed17 | 480 | return cwd->buf + offset; |
93a00542 | 481 | } |
b3f66fd3 NTND |
482 | |
483 | /* cwd outside worktree */ | |
484 | set_git_dir(gitdirenv); | |
485 | free(gitfile); | |
486 | return NULL; | |
93a00542 JN |
487 | } |
488 | ||
9951d3b3 | 489 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 490 | struct strbuf *cwd, int offset, |
9951d3b3 | 491 | int *nongit_ok) |
98937bef | 492 | { |
9951d3b3 NTND |
493 | if (check_repository_format_gently(gitdir, nongit_ok)) |
494 | return NULL; | |
98937bef | 495 | |
4868b2ea JN |
496 | /* --work-tree is set without --git-dir; use discovered one */ |
497 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
7333ed17 | 498 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
e2a57aac | 499 | gitdir = xstrdup(real_path(gitdir)); |
7333ed17 | 500 | if (chdir(cwd->buf)) |
4868b2ea | 501 | die_errno("Could not come back to cwd"); |
7333ed17 | 502 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
503 | } |
504 | ||
9951d3b3 NTND |
505 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
506 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
507 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
508 | if (chdir(cwd->buf)) | |
9951d3b3 | 509 | die_errno("Could not come back to cwd"); |
98937bef | 510 | return NULL; |
9951d3b3 | 511 | } |
98937bef | 512 | |
9951d3b3 NTND |
513 | /* #0, #1, #5, #8, #9, #12, #13 */ |
514 | set_git_work_tree("."); | |
515 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
516 | set_git_dir(gitdir); | |
98937bef | 517 | inside_git_dir = 0; |
9951d3b3 | 518 | inside_work_tree = 1; |
7333ed17 | 519 | if (offset == cwd->len) |
98937bef NTND |
520 | return NULL; |
521 | ||
522 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
523 | offset++; | |
7333ed17 RS |
524 | strbuf_addch(cwd, '/'); |
525 | return cwd->buf + offset; | |
98937bef NTND |
526 | } |
527 | ||
1cd8031b | 528 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
529 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
530 | int *nongit_ok) | |
68698da5 JN |
531 | { |
532 | int root_len; | |
533 | ||
1cd8031b NTND |
534 | if (check_repository_format_gently(".", nongit_ok)) |
535 | return NULL; | |
536 | ||
2cd83d10 JK |
537 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
538 | ||
4868b2ea JN |
539 | /* --work-tree is set without --git-dir; use discovered one */ |
540 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
541 | const char *gitdir; | |
542 | ||
7333ed17 RS |
543 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
544 | if (chdir(cwd->buf)) | |
4868b2ea | 545 | die_errno("Could not come back to cwd"); |
7333ed17 | 546 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
547 | } |
548 | ||
68698da5 | 549 | inside_git_dir = 1; |
1cd8031b | 550 | inside_work_tree = 0; |
7333ed17 RS |
551 | if (offset != cwd->len) { |
552 | if (chdir(cwd->buf)) | |
8fc0ae80 | 553 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
554 | root_len = offset_1st_component(cwd->buf); |
555 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
556 | set_git_dir(cwd->buf); | |
337e51ce | 557 | } |
1cd8031b | 558 | else |
68698da5 | 559 | set_git_dir("."); |
68698da5 JN |
560 | return NULL; |
561 | } | |
562 | ||
f161edeb JN |
563 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
564 | { | |
565 | if (!nongit_ok) | |
566 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
567 | if (chdir(cwd)) | |
568 | die_errno("Cannot come back to cwd"); | |
569 | *nongit_ok = 1; | |
570 | return NULL; | |
571 | } | |
572 | ||
2565b43b | 573 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
574 | { |
575 | struct stat buf; | |
2565b43b CB |
576 | if (stat(path, &buf)) { |
577 | die_errno("failed to stat '%*s%s%s'", | |
578 | prefix_len, | |
60c98d1e JN |
579 | prefix ? prefix : "", |
580 | prefix ? "/" : "", path); | |
2565b43b | 581 | } |
60c98d1e JN |
582 | return buf.st_dev; |
583 | } | |
584 | ||
9e2326c7 | 585 | /* |
1b77d83c MH |
586 | * A "string_list_each_func_t" function that canonicalizes an entry |
587 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
588 | * discards it if unusable. The presence of an empty entry in |
589 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
590 | * subsequent entries. | |
9e2326c7 | 591 | */ |
1b77d83c | 592 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 593 | void *cb_data) |
9e2326c7 | 594 | { |
7ec30aaa | 595 | int *empty_entry_found = cb_data; |
1b77d83c | 596 | char *ceil = item->string; |
9e2326c7 | 597 | |
7ec30aaa MH |
598 | if (!*ceil) { |
599 | *empty_entry_found = 1; | |
9e2326c7 | 600 | return 0; |
7ec30aaa | 601 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 602 | return 0; |
7ec30aaa MH |
603 | } else if (*empty_entry_found) { |
604 | /* Keep entry but do not canonicalize it */ | |
605 | return 1; | |
606 | } else { | |
607 | const char *real_path = real_path_if_valid(ceil); | |
608 | if (!real_path) | |
609 | return 0; | |
610 | free(item->string); | |
611 | item->string = xstrdup(real_path); | |
612 | return 1; | |
613 | } | |
9e2326c7 MH |
614 | } |
615 | ||
e90fdc39 JS |
616 | /* |
617 | * We cannot decide in this function whether we are in the work tree or | |
618 | * not, since the config can only be read _after_ this function was called. | |
619 | */ | |
a60645f9 | 620 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 621 | { |
0454dd93 | 622 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 623 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
7333ed17 | 624 | static struct strbuf cwd = STRBUF_INIT; |
9951d3b3 NTND |
625 | const char *gitdirenv, *ret; |
626 | char *gitfile; | |
7333ed17 | 627 | int offset, offset_parent, ceil_offset = -1; |
c7d1d1b1 RH |
628 | dev_t current_device = 0; |
629 | int one_filesystem = 1; | |
d288a700 | 630 | |
3c8687a7 TA |
631 | /* |
632 | * We may have read an incomplete configuration before | |
633 | * setting-up the git directory. If so, clear the cache so | |
634 | * that the next queries to the configuration reload complete | |
635 | * configuration (including the per-repo config file that we | |
636 | * ignored previously). | |
637 | */ | |
638 | git_config_clear(); | |
639 | ||
af05d679 SG |
640 | /* |
641 | * Let's assume that we are in a git repository. | |
642 | * If it turns out later that we are somewhere else, the value will be | |
643 | * updated accordingly. | |
644 | */ | |
645 | if (nongit_ok) | |
646 | *nongit_ok = 0; | |
647 | ||
7333ed17 | 648 | if (strbuf_getcwd(&cwd)) |
b3f66fd3 | 649 | die_errno("Unable to read current working directory"); |
7333ed17 | 650 | offset = cwd.len; |
b3f66fd3 | 651 | |
e90fdc39 JS |
652 | /* |
653 | * If GIT_DIR is set explicitly, we're not going | |
654 | * to do any discovery, but we still do repository | |
655 | * validation. | |
656 | */ | |
ad1a382f | 657 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 658 | if (gitdirenv) |
7333ed17 | 659 | return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok); |
d288a700 | 660 | |
31171d9e | 661 | if (env_ceiling_dirs) { |
7ec30aaa MH |
662 | int empty_entry_found = 0; |
663 | ||
31171d9e | 664 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 665 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 666 | canonicalize_ceiling_entry, &empty_entry_found); |
7333ed17 | 667 | ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs); |
31171d9e MH |
668 | string_list_clear(&ceiling_dirs, 0); |
669 | } | |
670 | ||
7333ed17 | 671 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf)) |
17d778e7 | 672 | ceil_offset = 1; |
d288a700 | 673 | |
892c41b9 | 674 | /* |
e90fdc39 | 675 | * Test in the following order (relative to the cwd): |
b44ebb19 | 676 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
677 | * - .git/ |
678 | * - ./ (bare) | |
b44ebb19 | 679 | * - ../.git |
e90fdc39 JS |
680 | * - ../.git/ |
681 | * - ../ (bare) | |
682 | * - ../../.git/ | |
683 | * etc. | |
892c41b9 | 684 | */ |
cf87463e | 685 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 686 | if (one_filesystem) |
2565b43b | 687 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 688 | for (;;) { |
13d6ec91 | 689 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
690 | if (gitfile) |
691 | gitdirenv = gitfile = xstrdup(gitfile); | |
692 | else { | |
693 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
694 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
695 | } | |
696 | ||
697 | if (gitdirenv) { | |
698 | ret = setup_discovered_git_dir(gitdirenv, | |
7333ed17 | 699 | &cwd, offset, |
9951d3b3 NTND |
700 | nongit_ok); |
701 | free(gitfile); | |
702 | return ret; | |
703 | } | |
704 | free(gitfile); | |
705 | ||
68698da5 | 706 | if (is_git_directory(".")) |
7333ed17 | 707 | return setup_bare_git_dir(&cwd, offset, nongit_ok); |
1cd8031b | 708 | |
2565b43b | 709 | offset_parent = offset; |
7333ed17 | 710 | while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/'); |
2565b43b | 711 | if (offset_parent <= ceil_offset) |
7333ed17 | 712 | return setup_nongit(cwd.buf, nongit_ok); |
8030e442 | 713 | if (one_filesystem) { |
7333ed17 RS |
714 | dev_t parent_device = get_device_or_die("..", cwd.buf, |
715 | offset); | |
60c98d1e | 716 | if (parent_device != current_device) { |
8030e442 | 717 | if (nongit_ok) { |
7333ed17 | 718 | if (chdir(cwd.buf)) |
8030e442 LD |
719 | die_errno("Cannot come back to cwd"); |
720 | *nongit_ok = 1; | |
721 | return NULL; | |
722 | } | |
7333ed17 | 723 | strbuf_setlen(&cwd, offset); |
2565b43b | 724 | die("Not a git repository (or any parent up to mount point %s)\n" |
7333ed17 RS |
725 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", |
726 | cwd.buf); | |
8030e442 LD |
727 | } |
728 | } | |
502ffe34 | 729 | if (chdir("..")) { |
7333ed17 RS |
730 | strbuf_setlen(&cwd, offset); |
731 | die_errno("Cannot change to '%s/..'", cwd.buf); | |
502ffe34 | 732 | } |
2565b43b | 733 | offset = offset_parent; |
892c41b9 | 734 | } |
d288a700 | 735 | } |
5e7bfe25 | 736 | |
a60645f9 NTND |
737 | const char *setup_git_directory_gently(int *nongit_ok) |
738 | { | |
739 | const char *prefix; | |
740 | ||
741 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f | 742 | if (prefix) |
a6f7f9a3 | 743 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 744 | else |
a6f7f9a3 | 745 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 746 | |
f07d6a1a | 747 | if (startup_info) { |
a60645f9 | 748 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
749 | startup_info->prefix = prefix; |
750 | } | |
a60645f9 NTND |
751 | return prefix; |
752 | } | |
753 | ||
94df2506 JH |
754 | int git_config_perm(const char *var, const char *value) |
755 | { | |
06cbe855 HO |
756 | int i; |
757 | char *endptr; | |
758 | ||
759 | if (value == NULL) | |
760 | return PERM_GROUP; | |
761 | ||
762 | if (!strcmp(value, "umask")) | |
763 | return PERM_UMASK; | |
764 | if (!strcmp(value, "group")) | |
765 | return PERM_GROUP; | |
766 | if (!strcmp(value, "all") || | |
767 | !strcmp(value, "world") || | |
768 | !strcmp(value, "everybody")) | |
769 | return PERM_EVERYBODY; | |
770 | ||
771 | /* Parse octal numbers */ | |
772 | i = strtol(value, &endptr, 8); | |
773 | ||
774 | /* If not an octal number, maybe true/false? */ | |
775 | if (*endptr != 0) | |
776 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
777 | ||
778 | /* | |
779 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 780 | * a chmod value to restrict to. |
06cbe855 HO |
781 | */ |
782 | switch (i) { | |
783 | case PERM_UMASK: /* 0 */ | |
784 | return PERM_UMASK; | |
785 | case OLD_PERM_GROUP: /* 1 */ | |
786 | return PERM_GROUP; | |
787 | case OLD_PERM_EVERYBODY: /* 2 */ | |
788 | return PERM_EVERYBODY; | |
94df2506 | 789 | } |
06cbe855 HO |
790 | |
791 | /* A filemode value was given: 0xxx */ | |
792 | ||
793 | if ((i & 0600) != 0600) | |
794 | die("Problem with core.sharedRepository filemode value " | |
795 | "(0%.3o).\nThe owner of files must always have " | |
796 | "read and write permissions.", i); | |
797 | ||
798 | /* | |
799 | * Mask filemode value. Others can not get write permission. | |
800 | * x flags for directories are handled separately. | |
801 | */ | |
5a688fe4 | 802 | return -(i & 0666); |
94df2506 JH |
803 | } |
804 | ||
ef90d6d4 | 805 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 806 | { |
299726d5 JS |
807 | if (strcmp(var, "core.repositoryformatversion") == 0) |
808 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 809 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 810 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
811 | else if (strcmp(var, "core.bare") == 0) { |
812 | is_bare_repository_cfg = git_config_bool(var, value); | |
813 | if (is_bare_repository_cfg == 1) | |
814 | inside_work_tree = -1; | |
815 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
816 | if (!value) |
817 | return config_error_nonbool(var); | |
8e0f7003 | 818 | free(git_work_tree_cfg); |
e90fdc39 JS |
819 | git_work_tree_cfg = xstrdup(value); |
820 | inside_work_tree = -1; | |
821 | } | |
299726d5 | 822 | return 0; |
ab9cb76f JH |
823 | } |
824 | ||
825 | int check_repository_format(void) | |
826 | { | |
337e51ce | 827 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
828 | } |
829 | ||
e1e5ec86 CB |
830 | /* |
831 | * Returns the "prefix", a path to the current working directory | |
832 | * relative to the work tree root, or NULL, if the current working | |
833 | * directory is not a strict subdirectory of the work tree root. The | |
834 | * prefix always ends with a '/' character. | |
835 | */ | |
5e7bfe25 JH |
836 | const char *setup_git_directory(void) |
837 | { | |
b3f66fd3 | 838 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 839 | } |
abc06822 FG |
840 | |
841 | const char *resolve_gitdir(const char *suspect) | |
842 | { | |
843 | if (is_git_directory(suspect)) | |
844 | return suspect; | |
efc5fb6a | 845 | return read_gitfile(suspect); |
abc06822 | 846 | } |
1d999ddd TR |
847 | |
848 | /* if any standard file descriptor is missing open it to /dev/null */ | |
849 | void sanitize_stdfds(void) | |
850 | { | |
851 | int fd = open("/dev/null", O_RDWR, 0); | |
852 | while (fd != -1 && fd < 2) | |
853 | fd = dup(fd); | |
854 | if (fd == -1) | |
855 | die_errno("open /dev/null or dup failed"); | |
856 | if (fd > 2) | |
857 | close(fd); | |
858 | } | |
de0957ce NTND |
859 | |
860 | int daemonize(void) | |
861 | { | |
862 | #ifdef NO_POSIX_GOODIES | |
863 | errno = ENOSYS; | |
864 | return -1; | |
865 | #else | |
866 | switch (fork()) { | |
867 | case 0: | |
868 | break; | |
869 | case -1: | |
870 | die_errno("fork failed"); | |
871 | default: | |
872 | exit(0); | |
873 | } | |
874 | if (setsid() == -1) | |
875 | die_errno("setsid failed"); | |
876 | close(0); | |
877 | close(1); | |
878 | close(2); | |
879 | sanitize_stdfds(); | |
880 | return 0; | |
881 | #endif | |
882 | } |