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Commit | Line | Data |
---|---|---|
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 | ||
4dc4e145 NTND |
227 | static void get_common_dir(struct strbuf *sb, const char *gitdir) |
228 | { | |
229 | struct strbuf data = STRBUF_INIT; | |
230 | struct strbuf path = STRBUF_INIT; | |
231 | const char *git_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
232 | if (git_common_dir) { | |
233 | strbuf_addstr(sb, git_common_dir); | |
234 | return; | |
235 | } | |
236 | strbuf_addf(&path, "%s/commondir", gitdir); | |
237 | if (file_exists(path.buf)) { | |
238 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
239 | die_errno(_("failed to read %s"), path.buf); | |
240 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
241 | data.buf[data.len - 1] == '\r')) | |
242 | data.len--; | |
243 | data.buf[data.len] = '\0'; | |
244 | strbuf_reset(&path); | |
245 | if (!is_absolute_path(data.buf)) | |
246 | strbuf_addf(&path, "%s/", gitdir); | |
247 | strbuf_addbuf(&path, &data); | |
248 | strbuf_addstr(sb, real_path(path.buf)); | |
249 | } else | |
250 | strbuf_addstr(sb, gitdir); | |
251 | strbuf_release(&data); | |
252 | strbuf_release(&path); | |
253 | } | |
d288a700 | 254 | |
5f5608bc | 255 | /* |
ad1a382f | 256 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 257 | * We want to see: |
5f5608bc | 258 | * |
790296fd | 259 | * - either an objects/ directory _or_ the proper |
5f5608bc | 260 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 261 | * - a refs/ directory |
8098a178 | 262 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
263 | * a proper "ref:", or a regular file HEAD that has a properly |
264 | * formatted sha1 object name. | |
5f5608bc | 265 | */ |
b3256eb8 | 266 | int is_git_directory(const char *suspect) |
5f5608bc | 267 | { |
1d186b6f NTND |
268 | struct strbuf path = STRBUF_INIT; |
269 | int ret = 0; | |
270 | size_t len; | |
ad1a382f | 271 | |
4dc4e145 NTND |
272 | /* Check worktree-related signatures */ |
273 | strbuf_addf(&path, "%s/HEAD", suspect); | |
274 | if (validate_headref(path.buf)) | |
275 | goto done; | |
276 | ||
277 | strbuf_reset(&path); | |
278 | get_common_dir(&path, suspect); | |
1d186b6f | 279 | len = path.len; |
4dc4e145 NTND |
280 | |
281 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
282 | if (getenv(DB_ENVIRONMENT)) { |
283 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 284 | goto done; |
ad1a382f SP |
285 | } |
286 | else { | |
4dc4e145 | 287 | strbuf_setlen(&path, len); |
1d186b6f NTND |
288 | strbuf_addstr(&path, "/objects"); |
289 | if (access(path.buf, X_OK)) | |
290 | goto done; | |
ad1a382f SP |
291 | } |
292 | ||
1d186b6f NTND |
293 | strbuf_setlen(&path, len); |
294 | strbuf_addstr(&path, "/refs"); | |
295 | if (access(path.buf, X_OK)) | |
296 | goto done; | |
ad1a382f | 297 | |
1d186b6f NTND |
298 | ret = 1; |
299 | done: | |
300 | strbuf_release(&path); | |
301 | return ret; | |
5f5608bc LT |
302 | } |
303 | ||
68025633 JS |
304 | int is_inside_git_dir(void) |
305 | { | |
e90fdc39 JS |
306 | if (inside_git_dir < 0) |
307 | inside_git_dir = is_inside_dir(get_git_dir()); | |
308 | return inside_git_dir; | |
892c41b9 ML |
309 | } |
310 | ||
892c41b9 ML |
311 | int is_inside_work_tree(void) |
312 | { | |
e90fdc39 JS |
313 | if (inside_work_tree < 0) |
314 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
315 | return inside_work_tree; | |
892c41b9 ML |
316 | } |
317 | ||
f3fa1838 JH |
318 | void setup_work_tree(void) |
319 | { | |
354e6534 JS |
320 | const char *work_tree, *git_dir; |
321 | static int initialized = 0; | |
322 | ||
323 | if (initialized) | |
324 | return; | |
325 | work_tree = get_git_work_tree(); | |
326 | git_dir = get_git_dir(); | |
59f0f2f3 | 327 | if (!is_absolute_path(git_dir)) |
e2a57aac | 328 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
329 | if (!work_tree || chdir(work_tree)) |
330 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
331 | |
332 | /* | |
333 | * Make sure subsequent git processes find correct worktree | |
334 | * if $GIT_WORK_TREE is set relative | |
335 | */ | |
336 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
337 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
338 | ||
41894ae3 | 339 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 340 | initialized = 1; |
59f0f2f3 MH |
341 | } |
342 | ||
337e51ce | 343 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 344 | { |
337e51ce NTND |
345 | char repo_config[PATH_MAX+1]; |
346 | ||
347 | /* | |
348 | * git_config() can't be used here because it calls git_pathdup() | |
349 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
350 | * set git_dir to ".git". | |
351 | * | |
352 | * We are in gitdir setup, no git dir has been found useable yet. | |
353 | * Use a gentler version of git_config() to check if this repo | |
354 | * is a good one. | |
355 | */ | |
356 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
357 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
358 | if (GIT_REPO_VERSION < repository_format_version) { |
359 | if (!nongit_ok) | |
360 | die ("Expected git repo version <= %d, found %d", | |
361 | GIT_REPO_VERSION, repository_format_version); | |
362 | warning("Expected git repo version <= %d, found %d", | |
363 | GIT_REPO_VERSION, repository_format_version); | |
364 | warning("Please upgrade Git"); | |
365 | *nongit_ok = -1; | |
366 | return -1; | |
367 | } | |
368 | return 0; | |
369 | } | |
370 | ||
b44ebb19 LH |
371 | /* |
372 | * Try to read the location of the git directory from the .git file, | |
373 | * return path to git directory if found. | |
374 | */ | |
13d6ec91 | 375 | const char *read_gitfile(const char *path) |
b44ebb19 LH |
376 | { |
377 | char *buf; | |
40c813e0 BK |
378 | char *dir; |
379 | const char *slash; | |
b44ebb19 LH |
380 | struct stat st; |
381 | int fd; | |
b1905aea | 382 | ssize_t len; |
b44ebb19 LH |
383 | |
384 | if (stat(path, &st)) | |
385 | return NULL; | |
386 | if (!S_ISREG(st.st_mode)) | |
387 | return NULL; | |
388 | fd = open(path, O_RDONLY); | |
389 | if (fd < 0) | |
d824cbba | 390 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
391 | buf = xmalloc(st.st_size + 1); |
392 | len = read_in_full(fd, buf, st.st_size); | |
393 | close(fd); | |
394 | if (len != st.st_size) | |
395 | die("Error reading %s", path); | |
396 | buf[len] = '\0'; | |
59556548 | 397 | if (!starts_with(buf, "gitdir: ")) |
b44ebb19 LH |
398 | die("Invalid gitfile format: %s", path); |
399 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
400 | len--; | |
401 | if (len < 9) | |
402 | die("No path in gitfile: %s", path); | |
403 | buf[len] = '\0'; | |
40c813e0 BK |
404 | dir = buf + 8; |
405 | ||
406 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
407 | size_t pathlen = slash+1 - path; | |
408 | size_t dirlen = pathlen + len - 8; | |
409 | dir = xmalloc(dirlen + 1); | |
410 | strncpy(dir, path, pathlen); | |
411 | strncpy(dir + pathlen, buf + 8, len - 8); | |
412 | dir[dirlen] = '\0'; | |
413 | free(buf); | |
414 | buf = dir; | |
415 | } | |
416 | ||
417 | if (!is_git_directory(dir)) | |
418 | die("Not a git repository: %s", dir); | |
e2a57aac | 419 | path = real_path(dir); |
40c813e0 | 420 | |
b44ebb19 LH |
421 | free(buf); |
422 | return path; | |
423 | } | |
424 | ||
e4e30347 | 425 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 426 | struct strbuf *cwd, |
b3f66fd3 | 427 | int *nongit_ok) |
e4e30347 | 428 | { |
b3f66fd3 NTND |
429 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
430 | const char *worktree; | |
431 | char *gitfile; | |
9b125da4 | 432 | int offset; |
e4e30347 JN |
433 | |
434 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
435 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 436 | |
13d6ec91 | 437 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
438 | if (gitfile) { |
439 | gitfile = xstrdup(gitfile); | |
440 | gitdirenv = gitfile; | |
441 | } | |
442 | ||
e4e30347 JN |
443 | if (!is_git_directory(gitdirenv)) { |
444 | if (nongit_ok) { | |
445 | *nongit_ok = 1; | |
b3f66fd3 | 446 | free(gitfile); |
e4e30347 JN |
447 | return NULL; |
448 | } | |
449 | die("Not a git repository: '%s'", gitdirenv); | |
450 | } | |
b3f66fd3 NTND |
451 | |
452 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
453 | free(gitfile); | |
454 | return NULL; | |
e4e30347 | 455 | } |
b3f66fd3 NTND |
456 | |
457 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
458 | if (work_tree_env) | |
459 | set_git_work_tree(work_tree_env); | |
460 | else if (is_bare_repository_cfg > 0) { | |
461 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
462 | die("core.bare and core.worktree do not make sense"); | |
463 | ||
464 | /* #18, #26 */ | |
465 | set_git_dir(gitdirenv); | |
466 | free(gitfile); | |
e4e30347 | 467 | return NULL; |
b3f66fd3 NTND |
468 | } |
469 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
470 | if (is_absolute_path(git_work_tree_cfg)) | |
471 | set_git_work_tree(git_work_tree_cfg); | |
472 | else { | |
56b9f6e7 | 473 | char *core_worktree; |
b3f66fd3 NTND |
474 | if (chdir(gitdirenv)) |
475 | die_errno("Could not chdir to '%s'", gitdirenv); | |
476 | if (chdir(git_work_tree_cfg)) | |
477 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 478 | core_worktree = xgetcwd(); |
7333ed17 | 479 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
480 | die_errno("Could not come back to cwd"); |
481 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 482 | free(core_worktree); |
b3f66fd3 NTND |
483 | } |
484 | } | |
2cd83d10 JK |
485 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
486 | /* #16d */ | |
487 | set_git_dir(gitdirenv); | |
488 | free(gitfile); | |
489 | return NULL; | |
490 | } | |
b3f66fd3 NTND |
491 | else /* #2, #10 */ |
492 | set_git_work_tree("."); | |
493 | ||
494 | /* set_git_work_tree() must have been called by now */ | |
495 | worktree = get_git_work_tree(); | |
496 | ||
497 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 498 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
499 | set_git_dir(gitdirenv); |
500 | free(gitfile); | |
e4e30347 | 501 | return NULL; |
b3f66fd3 | 502 | } |
e4e30347 | 503 | |
7333ed17 | 504 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 505 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 506 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
507 | if (chdir(worktree)) |
508 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 509 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 510 | free(gitfile); |
7333ed17 | 511 | return cwd->buf + offset; |
93a00542 | 512 | } |
b3f66fd3 NTND |
513 | |
514 | /* cwd outside worktree */ | |
515 | set_git_dir(gitdirenv); | |
516 | free(gitfile); | |
517 | return NULL; | |
93a00542 JN |
518 | } |
519 | ||
9951d3b3 | 520 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 521 | struct strbuf *cwd, int offset, |
9951d3b3 | 522 | int *nongit_ok) |
98937bef | 523 | { |
9951d3b3 NTND |
524 | if (check_repository_format_gently(gitdir, nongit_ok)) |
525 | return NULL; | |
98937bef | 526 | |
4868b2ea JN |
527 | /* --work-tree is set without --git-dir; use discovered one */ |
528 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
7333ed17 | 529 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
e2a57aac | 530 | gitdir = xstrdup(real_path(gitdir)); |
7333ed17 | 531 | if (chdir(cwd->buf)) |
4868b2ea | 532 | die_errno("Could not come back to cwd"); |
7333ed17 | 533 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
534 | } |
535 | ||
9951d3b3 NTND |
536 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
537 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
538 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
539 | if (chdir(cwd->buf)) | |
9951d3b3 | 540 | die_errno("Could not come back to cwd"); |
98937bef | 541 | return NULL; |
9951d3b3 | 542 | } |
98937bef | 543 | |
9951d3b3 NTND |
544 | /* #0, #1, #5, #8, #9, #12, #13 */ |
545 | set_git_work_tree("."); | |
546 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
547 | set_git_dir(gitdir); | |
98937bef | 548 | inside_git_dir = 0; |
9951d3b3 | 549 | inside_work_tree = 1; |
7333ed17 | 550 | if (offset == cwd->len) |
98937bef NTND |
551 | return NULL; |
552 | ||
553 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
554 | offset++; | |
7333ed17 RS |
555 | strbuf_addch(cwd, '/'); |
556 | return cwd->buf + offset; | |
98937bef NTND |
557 | } |
558 | ||
1cd8031b | 559 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
560 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
561 | int *nongit_ok) | |
68698da5 JN |
562 | { |
563 | int root_len; | |
564 | ||
1cd8031b NTND |
565 | if (check_repository_format_gently(".", nongit_ok)) |
566 | return NULL; | |
567 | ||
2cd83d10 JK |
568 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
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 | ||
7333ed17 RS |
574 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
575 | if (chdir(cwd->buf)) | |
4868b2ea | 576 | die_errno("Could not come back to cwd"); |
7333ed17 | 577 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
578 | } |
579 | ||
68698da5 | 580 | inside_git_dir = 1; |
1cd8031b | 581 | inside_work_tree = 0; |
7333ed17 RS |
582 | if (offset != cwd->len) { |
583 | if (chdir(cwd->buf)) | |
8fc0ae80 | 584 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
585 | root_len = offset_1st_component(cwd->buf); |
586 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
587 | set_git_dir(cwd->buf); | |
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 | ||
2565b43b | 604 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
605 | { |
606 | struct stat buf; | |
2565b43b CB |
607 | if (stat(path, &buf)) { |
608 | die_errno("failed to stat '%*s%s%s'", | |
609 | prefix_len, | |
60c98d1e JN |
610 | prefix ? prefix : "", |
611 | prefix ? "/" : "", path); | |
2565b43b | 612 | } |
60c98d1e JN |
613 | return buf.st_dev; |
614 | } | |
615 | ||
9e2326c7 | 616 | /* |
1b77d83c MH |
617 | * A "string_list_each_func_t" function that canonicalizes an entry |
618 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
619 | * discards it if unusable. The presence of an empty entry in |
620 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
621 | * subsequent entries. | |
9e2326c7 | 622 | */ |
1b77d83c | 623 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 624 | void *cb_data) |
9e2326c7 | 625 | { |
7ec30aaa | 626 | int *empty_entry_found = cb_data; |
1b77d83c | 627 | char *ceil = item->string; |
9e2326c7 | 628 | |
7ec30aaa MH |
629 | if (!*ceil) { |
630 | *empty_entry_found = 1; | |
9e2326c7 | 631 | return 0; |
7ec30aaa | 632 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 633 | return 0; |
7ec30aaa MH |
634 | } else if (*empty_entry_found) { |
635 | /* Keep entry but do not canonicalize it */ | |
636 | return 1; | |
637 | } else { | |
638 | const char *real_path = real_path_if_valid(ceil); | |
639 | if (!real_path) | |
640 | return 0; | |
641 | free(item->string); | |
642 | item->string = xstrdup(real_path); | |
643 | return 1; | |
644 | } | |
9e2326c7 MH |
645 | } |
646 | ||
e90fdc39 JS |
647 | /* |
648 | * We cannot decide in this function whether we are in the work tree or | |
649 | * not, since the config can only be read _after_ this function was called. | |
650 | */ | |
a60645f9 | 651 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 652 | { |
0454dd93 | 653 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 654 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
7333ed17 | 655 | static struct strbuf cwd = STRBUF_INIT; |
9951d3b3 NTND |
656 | const char *gitdirenv, *ret; |
657 | char *gitfile; | |
7333ed17 | 658 | int offset, offset_parent, ceil_offset = -1; |
c7d1d1b1 RH |
659 | dev_t current_device = 0; |
660 | int one_filesystem = 1; | |
d288a700 | 661 | |
3c8687a7 TA |
662 | /* |
663 | * We may have read an incomplete configuration before | |
664 | * setting-up the git directory. If so, clear the cache so | |
665 | * that the next queries to the configuration reload complete | |
666 | * configuration (including the per-repo config file that we | |
667 | * ignored previously). | |
668 | */ | |
669 | git_config_clear(); | |
670 | ||
af05d679 SG |
671 | /* |
672 | * Let's assume that we are in a git repository. | |
673 | * If it turns out later that we are somewhere else, the value will be | |
674 | * updated accordingly. | |
675 | */ | |
676 | if (nongit_ok) | |
677 | *nongit_ok = 0; | |
678 | ||
7333ed17 | 679 | if (strbuf_getcwd(&cwd)) |
b3f66fd3 | 680 | die_errno("Unable to read current working directory"); |
7333ed17 | 681 | offset = cwd.len; |
b3f66fd3 | 682 | |
e90fdc39 JS |
683 | /* |
684 | * If GIT_DIR is set explicitly, we're not going | |
685 | * to do any discovery, but we still do repository | |
686 | * validation. | |
687 | */ | |
ad1a382f | 688 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 689 | if (gitdirenv) |
7333ed17 | 690 | return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok); |
d288a700 | 691 | |
31171d9e | 692 | if (env_ceiling_dirs) { |
7ec30aaa MH |
693 | int empty_entry_found = 0; |
694 | ||
31171d9e | 695 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 696 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 697 | canonicalize_ceiling_entry, &empty_entry_found); |
7333ed17 | 698 | ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs); |
31171d9e MH |
699 | string_list_clear(&ceiling_dirs, 0); |
700 | } | |
701 | ||
7333ed17 | 702 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf)) |
17d778e7 | 703 | ceil_offset = 1; |
d288a700 | 704 | |
892c41b9 | 705 | /* |
e90fdc39 | 706 | * Test in the following order (relative to the cwd): |
b44ebb19 | 707 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
708 | * - .git/ |
709 | * - ./ (bare) | |
b44ebb19 | 710 | * - ../.git |
e90fdc39 JS |
711 | * - ../.git/ |
712 | * - ../ (bare) | |
713 | * - ../../.git/ | |
714 | * etc. | |
892c41b9 | 715 | */ |
cf87463e | 716 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 717 | if (one_filesystem) |
2565b43b | 718 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 719 | for (;;) { |
13d6ec91 | 720 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
721 | if (gitfile) |
722 | gitdirenv = gitfile = xstrdup(gitfile); | |
723 | else { | |
724 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
725 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
726 | } | |
727 | ||
728 | if (gitdirenv) { | |
729 | ret = setup_discovered_git_dir(gitdirenv, | |
7333ed17 | 730 | &cwd, offset, |
9951d3b3 NTND |
731 | nongit_ok); |
732 | free(gitfile); | |
733 | return ret; | |
734 | } | |
735 | free(gitfile); | |
736 | ||
68698da5 | 737 | if (is_git_directory(".")) |
7333ed17 | 738 | return setup_bare_git_dir(&cwd, offset, nongit_ok); |
1cd8031b | 739 | |
2565b43b | 740 | offset_parent = offset; |
7333ed17 | 741 | while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/'); |
2565b43b | 742 | if (offset_parent <= ceil_offset) |
7333ed17 | 743 | return setup_nongit(cwd.buf, nongit_ok); |
8030e442 | 744 | if (one_filesystem) { |
7333ed17 RS |
745 | dev_t parent_device = get_device_or_die("..", cwd.buf, |
746 | offset); | |
60c98d1e | 747 | if (parent_device != current_device) { |
8030e442 | 748 | if (nongit_ok) { |
7333ed17 | 749 | if (chdir(cwd.buf)) |
8030e442 LD |
750 | die_errno("Cannot come back to cwd"); |
751 | *nongit_ok = 1; | |
752 | return NULL; | |
753 | } | |
7333ed17 | 754 | strbuf_setlen(&cwd, offset); |
2565b43b | 755 | die("Not a git repository (or any parent up to mount point %s)\n" |
7333ed17 RS |
756 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", |
757 | cwd.buf); | |
8030e442 LD |
758 | } |
759 | } | |
502ffe34 | 760 | if (chdir("..")) { |
7333ed17 RS |
761 | strbuf_setlen(&cwd, offset); |
762 | die_errno("Cannot change to '%s/..'", cwd.buf); | |
502ffe34 | 763 | } |
2565b43b | 764 | offset = offset_parent; |
892c41b9 | 765 | } |
d288a700 | 766 | } |
5e7bfe25 | 767 | |
a60645f9 NTND |
768 | const char *setup_git_directory_gently(int *nongit_ok) |
769 | { | |
770 | const char *prefix; | |
771 | ||
772 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f | 773 | if (prefix) |
a6f7f9a3 | 774 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 775 | else |
a6f7f9a3 | 776 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 777 | |
f07d6a1a | 778 | if (startup_info) { |
a60645f9 | 779 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
780 | startup_info->prefix = prefix; |
781 | } | |
a60645f9 NTND |
782 | return prefix; |
783 | } | |
784 | ||
94df2506 JH |
785 | int git_config_perm(const char *var, const char *value) |
786 | { | |
06cbe855 HO |
787 | int i; |
788 | char *endptr; | |
789 | ||
790 | if (value == NULL) | |
791 | return PERM_GROUP; | |
792 | ||
793 | if (!strcmp(value, "umask")) | |
794 | return PERM_UMASK; | |
795 | if (!strcmp(value, "group")) | |
796 | return PERM_GROUP; | |
797 | if (!strcmp(value, "all") || | |
798 | !strcmp(value, "world") || | |
799 | !strcmp(value, "everybody")) | |
800 | return PERM_EVERYBODY; | |
801 | ||
802 | /* Parse octal numbers */ | |
803 | i = strtol(value, &endptr, 8); | |
804 | ||
805 | /* If not an octal number, maybe true/false? */ | |
806 | if (*endptr != 0) | |
807 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
808 | ||
809 | /* | |
810 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 811 | * a chmod value to restrict to. |
06cbe855 HO |
812 | */ |
813 | switch (i) { | |
814 | case PERM_UMASK: /* 0 */ | |
815 | return PERM_UMASK; | |
816 | case OLD_PERM_GROUP: /* 1 */ | |
817 | return PERM_GROUP; | |
818 | case OLD_PERM_EVERYBODY: /* 2 */ | |
819 | return PERM_EVERYBODY; | |
94df2506 | 820 | } |
06cbe855 HO |
821 | |
822 | /* A filemode value was given: 0xxx */ | |
823 | ||
824 | if ((i & 0600) != 0600) | |
825 | die("Problem with core.sharedRepository filemode value " | |
826 | "(0%.3o).\nThe owner of files must always have " | |
827 | "read and write permissions.", i); | |
828 | ||
829 | /* | |
830 | * Mask filemode value. Others can not get write permission. | |
831 | * x flags for directories are handled separately. | |
832 | */ | |
5a688fe4 | 833 | return -(i & 0666); |
94df2506 JH |
834 | } |
835 | ||
ef90d6d4 | 836 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 837 | { |
299726d5 JS |
838 | if (strcmp(var, "core.repositoryformatversion") == 0) |
839 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 840 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 841 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
842 | else if (strcmp(var, "core.bare") == 0) { |
843 | is_bare_repository_cfg = git_config_bool(var, value); | |
844 | if (is_bare_repository_cfg == 1) | |
845 | inside_work_tree = -1; | |
846 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
847 | if (!value) |
848 | return config_error_nonbool(var); | |
8e0f7003 | 849 | free(git_work_tree_cfg); |
e90fdc39 JS |
850 | git_work_tree_cfg = xstrdup(value); |
851 | inside_work_tree = -1; | |
852 | } | |
299726d5 | 853 | return 0; |
ab9cb76f JH |
854 | } |
855 | ||
856 | int check_repository_format(void) | |
857 | { | |
337e51ce | 858 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
859 | } |
860 | ||
e1e5ec86 CB |
861 | /* |
862 | * Returns the "prefix", a path to the current working directory | |
863 | * relative to the work tree root, or NULL, if the current working | |
864 | * directory is not a strict subdirectory of the work tree root. The | |
865 | * prefix always ends with a '/' character. | |
866 | */ | |
5e7bfe25 JH |
867 | const char *setup_git_directory(void) |
868 | { | |
b3f66fd3 | 869 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 870 | } |
abc06822 FG |
871 | |
872 | const char *resolve_gitdir(const char *suspect) | |
873 | { | |
874 | if (is_git_directory(suspect)) | |
875 | return suspect; | |
efc5fb6a | 876 | return read_gitfile(suspect); |
abc06822 | 877 | } |
1d999ddd TR |
878 | |
879 | /* if any standard file descriptor is missing open it to /dev/null */ | |
880 | void sanitize_stdfds(void) | |
881 | { | |
882 | int fd = open("/dev/null", O_RDWR, 0); | |
883 | while (fd != -1 && fd < 2) | |
884 | fd = dup(fd); | |
885 | if (fd == -1) | |
886 | die_errno("open /dev/null or dup failed"); | |
887 | if (fd > 2) | |
888 | close(fd); | |
889 | } | |
de0957ce NTND |
890 | |
891 | int daemonize(void) | |
892 | { | |
893 | #ifdef NO_POSIX_GOODIES | |
894 | errno = ENOSYS; | |
895 | return -1; | |
896 | #else | |
897 | switch (fork()) { | |
898 | case 0: | |
899 | break; | |
900 | case -1: | |
901 | die_errno("fork failed"); | |
902 | default: | |
903 | exit(0); | |
904 | } | |
905 | if (setsid() == -1) | |
906 | die_errno("setsid failed"); | |
907 | close(0); | |
908 | close(1); | |
909 | close(2); | |
910 | sanitize_stdfds(); | |
911 | return 0; | |
912 | #endif | |
913 | } |