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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; | |
fada7674 | 7 | static int work_tree_config_is_bogus; |
d288a700 | 8 | |
ddc2a628 MEW |
9 | /* |
10 | * The input parameter must contain an absolute path, and it must already be | |
11 | * normalized. | |
12 | * | |
13 | * Find the part of an absolute path that lies inside the work tree by | |
14 | * dereferencing symlinks outside the work tree, for example: | |
15 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
16 | * /dir/file (work tree is /) -> dir/file | |
17 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
18 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
19 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
20 | */ | |
21 | static int abspath_part_inside_repo(char *path) | |
22 | { | |
23 | size_t len; | |
24 | size_t wtlen; | |
25 | char *path0; | |
26 | int off; | |
27 | const char *work_tree = get_git_work_tree(); | |
28 | ||
29 | if (!work_tree) | |
30 | return -1; | |
31 | wtlen = strlen(work_tree); | |
32 | len = strlen(path); | |
6127ff63 | 33 | off = offset_1st_component(path); |
ddc2a628 MEW |
34 | |
35 | /* check if work tree is already the prefix */ | |
36 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
37 | if (path[wtlen] == '/') { | |
38 | memmove(path, path + wtlen + 1, len - wtlen); | |
39 | return 0; | |
40 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
41 | /* work tree is the root, or the whole path */ | |
42 | memmove(path, path + wtlen, len - wtlen + 1); | |
43 | return 0; | |
44 | } | |
45 | /* work tree might match beginning of a symlink to work tree */ | |
46 | off = wtlen; | |
47 | } | |
48 | path0 = path; | |
6127ff63 | 49 | path += off; |
ddc2a628 MEW |
50 | |
51 | /* check each '/'-terminated level */ | |
52 | while (*path) { | |
53 | path++; | |
54 | if (*path == '/') { | |
55 | *path = '\0'; | |
56 | if (strcmp(real_path(path0), work_tree) == 0) { | |
57 | memmove(path0, path + 1, len - (path - path0)); | |
58 | return 0; | |
59 | } | |
60 | *path = '/'; | |
61 | } | |
62 | } | |
63 | ||
64 | /* check whole path */ | |
65 | if (strcmp(real_path(path0), work_tree) == 0) { | |
66 | *path0 = '\0'; | |
67 | return 0; | |
68 | } | |
69 | ||
70 | return -1; | |
71 | } | |
72 | ||
645a29c4 NTND |
73 | /* |
74 | * Normalize "path", prepending the "prefix" for relative paths. If | |
75 | * remaining_prefix is not NULL, return the actual prefix still | |
76 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
77 | * | |
78 | * foo -> sub1/sub2/foo (full prefix) | |
79 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
80 | * ../../bar -> bar (no remaining prefix) | |
81 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
82 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
83 | */ | |
84 | char *prefix_path_gently(const char *prefix, int len, | |
85 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
86 | { |
87 | const char *orig = path; | |
18e051a3 CMAB |
88 | char *sanitized; |
89 | if (is_absolute_path(orig)) { | |
655ee9ea | 90 | sanitized = xmalloc(strlen(path) + 1); |
645a29c4 NTND |
91 | if (remaining_prefix) |
92 | *remaining_prefix = 0; | |
655ee9ea MEW |
93 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
94 | free(sanitized); | |
95 | return NULL; | |
96 | } | |
97 | if (abspath_part_inside_repo(sanitized)) { | |
98 | free(sanitized); | |
99 | return NULL; | |
100 | } | |
18e051a3 CMAB |
101 | } else { |
102 | sanitized = xmalloc(len + strlen(path) + 1); | |
d089ebaa JH |
103 | if (len) |
104 | memcpy(sanitized, prefix, len); | |
105 | strcpy(sanitized + len, path); | |
645a29c4 NTND |
106 | if (remaining_prefix) |
107 | *remaining_prefix = len; | |
655ee9ea | 108 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
109 | free(sanitized); |
110 | return NULL; | |
d089ebaa | 111 | } |
d089ebaa JH |
112 | } |
113 | return sanitized; | |
f332726e LT |
114 | } |
115 | ||
546e0fd9 JK |
116 | char *prefix_path(const char *prefix, int len, const char *path) |
117 | { | |
645a29c4 | 118 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
119 | if (!r) |
120 | die("'%s' is outside repository", path); | |
121 | return r; | |
122 | } | |
123 | ||
124 | int path_inside_repo(const char *prefix, const char *path) | |
125 | { | |
126 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 127 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
128 | if (r) { |
129 | free(r); | |
130 | return 1; | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
c6e8c800 JH |
135 | int check_filename(const char *prefix, const char *arg) |
136 | { | |
137 | const char *name; | |
138 | struct stat st; | |
139 | ||
59556548 | 140 | if (starts_with(arg, ":/")) { |
4db86e8b NTND |
141 | if (arg[2] == '\0') /* ":/" is root dir, always exists */ |
142 | return 1; | |
143 | name = arg + 2; | |
28fcc0b7 NTND |
144 | } else if (!no_wildcard(arg)) |
145 | return 1; | |
146 | else if (prefix) | |
4db86e8b NTND |
147 | name = prefix_filename(prefix, strlen(prefix), arg); |
148 | else | |
149 | name = arg; | |
c6e8c800 JH |
150 | if (!lstat(name, &st)) |
151 | return 1; /* file exists */ | |
152 | if (errno == ENOENT || errno == ENOTDIR) | |
153 | return 0; /* file does not exist */ | |
154 | die_errno("failed to stat '%s'", arg); | |
155 | } | |
156 | ||
023e37c3 MM |
157 | static void NORETURN die_verify_filename(const char *prefix, |
158 | const char *arg, | |
159 | int diagnose_misspelt_rev) | |
009fee47 | 160 | { |
023e37c3 MM |
161 | if (!diagnose_misspelt_rev) |
162 | die("%s: no such path in the working tree.\n" | |
4d4b5739 | 163 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally.", |
023e37c3 | 164 | arg); |
0e539dca JH |
165 | /* |
166 | * Saying "'(icase)foo' does not exist in the index" when the | |
167 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
168 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 169 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
170 | */ |
171 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 172 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 173 | |
009fee47 MM |
174 | /* ... or fall back the most general message. */ |
175 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
4d4b5739 MM |
176 | "Use '--' to separate paths from revisions, like this:\n" |
177 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
009fee47 MM |
178 | |
179 | } | |
180 | ||
e23d0b4a LT |
181 | /* |
182 | * Verify a filename that we got as an argument for a pathspec | |
183 | * entry. Note that a filename that begins with "-" never verifies | |
184 | * as true, because even if such a filename were to exist, we want | |
185 | * it to be preceded by the "--" marker (or we want the user to | |
186 | * use a format like "./-filename") | |
023e37c3 MM |
187 | * |
188 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
189 | * diagnosis when dying upon finding that "name" is not a pathname. | |
190 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
191 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
192 | * will only complain about an inexisting file. | |
193 | * | |
194 | * This function is typically called to check that a "file or rev" | |
195 | * argument is unambiguous. In this case, the caller will want | |
196 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
197 | * argument (which could have been a revision), and | |
198 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
199 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 200 | */ |
023e37c3 MM |
201 | void verify_filename(const char *prefix, |
202 | const char *arg, | |
203 | int diagnose_misspelt_rev) | |
e23d0b4a | 204 | { |
e23d0b4a LT |
205 | if (*arg == '-') |
206 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 207 | if (check_filename(prefix, arg)) |
e23d0b4a | 208 | return; |
023e37c3 | 209 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
210 | } |
211 | ||
ea92f41f JH |
212 | /* |
213 | * Opposite of the above: the command line did not have -- marker | |
214 | * and we parsed the arg as a refname. It should not be interpretable | |
215 | * as a filename. | |
216 | */ | |
217 | void verify_non_filename(const char *prefix, const char *arg) | |
218 | { | |
7ae3df8c | 219 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 220 | return; |
ea92f41f JH |
221 | if (*arg == '-') |
222 | return; /* flag */ | |
c6e8c800 JH |
223 | if (!check_filename(prefix, arg)) |
224 | return; | |
225 | die("ambiguous argument '%s': both revision and filename\n" | |
4d4b5739 MM |
226 | "Use '--' to separate paths from revisions, like this:\n" |
227 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
ea92f41f JH |
228 | } |
229 | ||
31e26ebc | 230 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
4dc4e145 NTND |
231 | { |
232 | struct strbuf data = STRBUF_INIT; | |
233 | struct strbuf path = STRBUF_INIT; | |
234 | const char *git_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
31e26ebc | 235 | int ret = 0; |
4dc4e145 NTND |
236 | if (git_common_dir) { |
237 | strbuf_addstr(sb, git_common_dir); | |
31e26ebc | 238 | return 1; |
4dc4e145 NTND |
239 | } |
240 | strbuf_addf(&path, "%s/commondir", gitdir); | |
241 | if (file_exists(path.buf)) { | |
242 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
243 | die_errno(_("failed to read %s"), path.buf); | |
244 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
245 | data.buf[data.len - 1] == '\r')) | |
246 | data.len--; | |
247 | data.buf[data.len] = '\0'; | |
248 | strbuf_reset(&path); | |
249 | if (!is_absolute_path(data.buf)) | |
250 | strbuf_addf(&path, "%s/", gitdir); | |
251 | strbuf_addbuf(&path, &data); | |
252 | strbuf_addstr(sb, real_path(path.buf)); | |
31e26ebc | 253 | ret = 1; |
4dc4e145 NTND |
254 | } else |
255 | strbuf_addstr(sb, gitdir); | |
256 | strbuf_release(&data); | |
257 | strbuf_release(&path); | |
31e26ebc | 258 | return ret; |
4dc4e145 | 259 | } |
d288a700 | 260 | |
5f5608bc | 261 | /* |
ad1a382f | 262 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 263 | * We want to see: |
5f5608bc | 264 | * |
790296fd | 265 | * - either an objects/ directory _or_ the proper |
5f5608bc | 266 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 267 | * - a refs/ directory |
8098a178 | 268 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
269 | * a proper "ref:", or a regular file HEAD that has a properly |
270 | * formatted sha1 object name. | |
5f5608bc | 271 | */ |
b3256eb8 | 272 | int is_git_directory(const char *suspect) |
5f5608bc | 273 | { |
1d186b6f NTND |
274 | struct strbuf path = STRBUF_INIT; |
275 | int ret = 0; | |
276 | size_t len; | |
ad1a382f | 277 | |
4dc4e145 NTND |
278 | /* Check worktree-related signatures */ |
279 | strbuf_addf(&path, "%s/HEAD", suspect); | |
280 | if (validate_headref(path.buf)) | |
281 | goto done; | |
282 | ||
283 | strbuf_reset(&path); | |
284 | get_common_dir(&path, suspect); | |
1d186b6f | 285 | len = path.len; |
4dc4e145 NTND |
286 | |
287 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
288 | if (getenv(DB_ENVIRONMENT)) { |
289 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 290 | goto done; |
ad1a382f SP |
291 | } |
292 | else { | |
4dc4e145 | 293 | strbuf_setlen(&path, len); |
1d186b6f NTND |
294 | strbuf_addstr(&path, "/objects"); |
295 | if (access(path.buf, X_OK)) | |
296 | goto done; | |
ad1a382f SP |
297 | } |
298 | ||
1d186b6f NTND |
299 | strbuf_setlen(&path, len); |
300 | strbuf_addstr(&path, "/refs"); | |
301 | if (access(path.buf, X_OK)) | |
302 | goto done; | |
ad1a382f | 303 | |
1d186b6f NTND |
304 | ret = 1; |
305 | done: | |
306 | strbuf_release(&path); | |
307 | return ret; | |
5f5608bc LT |
308 | } |
309 | ||
68025633 JS |
310 | int is_inside_git_dir(void) |
311 | { | |
e90fdc39 JS |
312 | if (inside_git_dir < 0) |
313 | inside_git_dir = is_inside_dir(get_git_dir()); | |
314 | return inside_git_dir; | |
892c41b9 ML |
315 | } |
316 | ||
892c41b9 ML |
317 | int is_inside_work_tree(void) |
318 | { | |
e90fdc39 JS |
319 | if (inside_work_tree < 0) |
320 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
321 | return inside_work_tree; | |
892c41b9 ML |
322 | } |
323 | ||
f3fa1838 JH |
324 | void setup_work_tree(void) |
325 | { | |
354e6534 JS |
326 | const char *work_tree, *git_dir; |
327 | static int initialized = 0; | |
328 | ||
329 | if (initialized) | |
330 | return; | |
fada7674 JK |
331 | |
332 | if (work_tree_config_is_bogus) | |
333 | die("unable to set up work tree using invalid config"); | |
334 | ||
354e6534 JS |
335 | work_tree = get_git_work_tree(); |
336 | git_dir = get_git_dir(); | |
59f0f2f3 | 337 | if (!is_absolute_path(git_dir)) |
e2a57aac | 338 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
339 | if (!work_tree || chdir(work_tree)) |
340 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
341 | |
342 | /* | |
343 | * Make sure subsequent git processes find correct worktree | |
344 | * if $GIT_WORK_TREE is set relative | |
345 | */ | |
346 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
347 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
348 | ||
41894ae3 | 349 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 350 | initialized = 1; |
59f0f2f3 MH |
351 | } |
352 | ||
31e26ebc NTND |
353 | static int check_repo_format(const char *var, const char *value, void *cb) |
354 | { | |
355 | if (strcmp(var, "core.repositoryformatversion") == 0) | |
356 | repository_format_version = git_config_int(var, value); | |
357 | else if (strcmp(var, "core.sharedrepository") == 0) | |
358 | shared_repository = git_config_perm(var, value); | |
359 | return 0; | |
360 | } | |
361 | ||
337e51ce | 362 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 363 | { |
7d0fb0da NTND |
364 | struct strbuf sb = STRBUF_INIT; |
365 | const char *repo_config; | |
31e26ebc | 366 | config_fn_t fn; |
7d0fb0da | 367 | int ret = 0; |
337e51ce | 368 | |
31e26ebc NTND |
369 | if (get_common_dir(&sb, gitdir)) |
370 | fn = check_repo_format; | |
371 | else | |
372 | fn = check_repository_format_version; | |
e61a509a NTND |
373 | strbuf_addstr(&sb, "/config"); |
374 | repo_config = sb.buf; | |
375 | ||
337e51ce NTND |
376 | /* |
377 | * git_config() can't be used here because it calls git_pathdup() | |
378 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
379 | * set git_dir to ".git". | |
380 | * | |
381 | * We are in gitdir setup, no git dir has been found useable yet. | |
382 | * Use a gentler version of git_config() to check if this repo | |
383 | * is a good one. | |
384 | */ | |
31e26ebc | 385 | git_config_early(fn, NULL, repo_config); |
9459aa77 NTND |
386 | if (GIT_REPO_VERSION < repository_format_version) { |
387 | if (!nongit_ok) | |
388 | die ("Expected git repo version <= %d, found %d", | |
389 | GIT_REPO_VERSION, repository_format_version); | |
390 | warning("Expected git repo version <= %d, found %d", | |
391 | GIT_REPO_VERSION, repository_format_version); | |
392 | warning("Please upgrade Git"); | |
393 | *nongit_ok = -1; | |
7d0fb0da | 394 | ret = -1; |
9459aa77 | 395 | } |
7d0fb0da NTND |
396 | strbuf_release(&sb); |
397 | return ret; | |
9459aa77 NTND |
398 | } |
399 | ||
23af91d1 NTND |
400 | static void update_linked_gitdir(const char *gitfile, const char *gitdir) |
401 | { | |
402 | struct strbuf path = STRBUF_INIT; | |
403 | struct stat st; | |
404 | ||
405 | strbuf_addf(&path, "%s/gitfile", gitdir); | |
406 | if (stat(path.buf, &st) || st.st_mtime + 24 * 3600 < time(NULL)) | |
407 | write_file(path.buf, 0, "%s\n", gitfile); | |
408 | strbuf_release(&path); | |
409 | } | |
410 | ||
b44ebb19 LH |
411 | /* |
412 | * Try to read the location of the git directory from the .git file, | |
413 | * return path to git directory if found. | |
414 | */ | |
13d6ec91 | 415 | const char *read_gitfile(const char *path) |
b44ebb19 LH |
416 | { |
417 | char *buf; | |
40c813e0 BK |
418 | char *dir; |
419 | const char *slash; | |
b44ebb19 LH |
420 | struct stat st; |
421 | int fd; | |
b1905aea | 422 | ssize_t len; |
b44ebb19 LH |
423 | |
424 | if (stat(path, &st)) | |
425 | return NULL; | |
426 | if (!S_ISREG(st.st_mode)) | |
427 | return NULL; | |
428 | fd = open(path, O_RDONLY); | |
429 | if (fd < 0) | |
d824cbba | 430 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
431 | buf = xmalloc(st.st_size + 1); |
432 | len = read_in_full(fd, buf, st.st_size); | |
433 | close(fd); | |
434 | if (len != st.st_size) | |
435 | die("Error reading %s", path); | |
436 | buf[len] = '\0'; | |
59556548 | 437 | if (!starts_with(buf, "gitdir: ")) |
b44ebb19 LH |
438 | die("Invalid gitfile format: %s", path); |
439 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
440 | len--; | |
441 | if (len < 9) | |
442 | die("No path in gitfile: %s", path); | |
443 | buf[len] = '\0'; | |
40c813e0 BK |
444 | dir = buf + 8; |
445 | ||
446 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
447 | size_t pathlen = slash+1 - path; | |
448 | size_t dirlen = pathlen + len - 8; | |
449 | dir = xmalloc(dirlen + 1); | |
450 | strncpy(dir, path, pathlen); | |
451 | strncpy(dir + pathlen, buf + 8, len - 8); | |
452 | dir[dirlen] = '\0'; | |
453 | free(buf); | |
454 | buf = dir; | |
455 | } | |
456 | ||
457 | if (!is_git_directory(dir)) | |
458 | die("Not a git repository: %s", dir); | |
23af91d1 NTND |
459 | |
460 | update_linked_gitdir(path, dir); | |
e2a57aac | 461 | path = real_path(dir); |
40c813e0 | 462 | |
b44ebb19 LH |
463 | free(buf); |
464 | return path; | |
465 | } | |
466 | ||
e4e30347 | 467 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 468 | struct strbuf *cwd, |
b3f66fd3 | 469 | int *nongit_ok) |
e4e30347 | 470 | { |
b3f66fd3 NTND |
471 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
472 | const char *worktree; | |
473 | char *gitfile; | |
9b125da4 | 474 | int offset; |
e4e30347 JN |
475 | |
476 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
477 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 478 | |
13d6ec91 | 479 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
480 | if (gitfile) { |
481 | gitfile = xstrdup(gitfile); | |
482 | gitdirenv = gitfile; | |
483 | } | |
484 | ||
e4e30347 JN |
485 | if (!is_git_directory(gitdirenv)) { |
486 | if (nongit_ok) { | |
487 | *nongit_ok = 1; | |
b3f66fd3 | 488 | free(gitfile); |
e4e30347 JN |
489 | return NULL; |
490 | } | |
491 | die("Not a git repository: '%s'", gitdirenv); | |
492 | } | |
b3f66fd3 NTND |
493 | |
494 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
495 | free(gitfile); | |
496 | return NULL; | |
e4e30347 | 497 | } |
b3f66fd3 NTND |
498 | |
499 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
500 | if (work_tree_env) | |
501 | set_git_work_tree(work_tree_env); | |
502 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
503 | if (git_work_tree_cfg) { |
504 | /* #22.2, #30 */ | |
505 | warning("core.bare and core.worktree do not make sense"); | |
506 | work_tree_config_is_bogus = 1; | |
507 | } | |
b3f66fd3 NTND |
508 | |
509 | /* #18, #26 */ | |
510 | set_git_dir(gitdirenv); | |
511 | free(gitfile); | |
e4e30347 | 512 | return NULL; |
b3f66fd3 NTND |
513 | } |
514 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
515 | if (is_absolute_path(git_work_tree_cfg)) | |
516 | set_git_work_tree(git_work_tree_cfg); | |
517 | else { | |
56b9f6e7 | 518 | char *core_worktree; |
b3f66fd3 NTND |
519 | if (chdir(gitdirenv)) |
520 | die_errno("Could not chdir to '%s'", gitdirenv); | |
521 | if (chdir(git_work_tree_cfg)) | |
522 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 523 | core_worktree = xgetcwd(); |
7333ed17 | 524 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
525 | die_errno("Could not come back to cwd"); |
526 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 527 | free(core_worktree); |
b3f66fd3 NTND |
528 | } |
529 | } | |
2cd83d10 JK |
530 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
531 | /* #16d */ | |
532 | set_git_dir(gitdirenv); | |
533 | free(gitfile); | |
534 | return NULL; | |
535 | } | |
b3f66fd3 NTND |
536 | else /* #2, #10 */ |
537 | set_git_work_tree("."); | |
538 | ||
539 | /* set_git_work_tree() must have been called by now */ | |
540 | worktree = get_git_work_tree(); | |
541 | ||
542 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 543 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
544 | set_git_dir(gitdirenv); |
545 | free(gitfile); | |
e4e30347 | 546 | return NULL; |
b3f66fd3 | 547 | } |
e4e30347 | 548 | |
7333ed17 | 549 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 550 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 551 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
552 | if (chdir(worktree)) |
553 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 554 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 555 | free(gitfile); |
7333ed17 | 556 | return cwd->buf + offset; |
93a00542 | 557 | } |
b3f66fd3 NTND |
558 | |
559 | /* cwd outside worktree */ | |
560 | set_git_dir(gitdirenv); | |
561 | free(gitfile); | |
562 | return NULL; | |
93a00542 JN |
563 | } |
564 | ||
9951d3b3 | 565 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 566 | struct strbuf *cwd, int offset, |
9951d3b3 | 567 | int *nongit_ok) |
98937bef | 568 | { |
9951d3b3 NTND |
569 | if (check_repository_format_gently(gitdir, nongit_ok)) |
570 | return NULL; | |
98937bef | 571 | |
4868b2ea JN |
572 | /* --work-tree is set without --git-dir; use discovered one */ |
573 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
7333ed17 | 574 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
e2a57aac | 575 | gitdir = xstrdup(real_path(gitdir)); |
7333ed17 | 576 | if (chdir(cwd->buf)) |
4868b2ea | 577 | die_errno("Could not come back to cwd"); |
7333ed17 | 578 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
579 | } |
580 | ||
9951d3b3 NTND |
581 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
582 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
583 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
584 | if (chdir(cwd->buf)) | |
9951d3b3 | 585 | die_errno("Could not come back to cwd"); |
98937bef | 586 | return NULL; |
9951d3b3 | 587 | } |
98937bef | 588 | |
9951d3b3 NTND |
589 | /* #0, #1, #5, #8, #9, #12, #13 */ |
590 | set_git_work_tree("."); | |
591 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
592 | set_git_dir(gitdir); | |
98937bef | 593 | inside_git_dir = 0; |
9951d3b3 | 594 | inside_work_tree = 1; |
7333ed17 | 595 | if (offset == cwd->len) |
98937bef NTND |
596 | return NULL; |
597 | ||
598 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
599 | offset++; | |
7333ed17 RS |
600 | strbuf_addch(cwd, '/'); |
601 | return cwd->buf + offset; | |
98937bef NTND |
602 | } |
603 | ||
1cd8031b | 604 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
605 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
606 | int *nongit_ok) | |
68698da5 JN |
607 | { |
608 | int root_len; | |
609 | ||
1cd8031b NTND |
610 | if (check_repository_format_gently(".", nongit_ok)) |
611 | return NULL; | |
612 | ||
2cd83d10 JK |
613 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
614 | ||
4868b2ea JN |
615 | /* --work-tree is set without --git-dir; use discovered one */ |
616 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
617 | const char *gitdir; | |
618 | ||
7333ed17 RS |
619 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
620 | if (chdir(cwd->buf)) | |
4868b2ea | 621 | die_errno("Could not come back to cwd"); |
7333ed17 | 622 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
623 | } |
624 | ||
68698da5 | 625 | inside_git_dir = 1; |
1cd8031b | 626 | inside_work_tree = 0; |
7333ed17 RS |
627 | if (offset != cwd->len) { |
628 | if (chdir(cwd->buf)) | |
8fc0ae80 | 629 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
630 | root_len = offset_1st_component(cwd->buf); |
631 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
632 | set_git_dir(cwd->buf); | |
337e51ce | 633 | } |
1cd8031b | 634 | else |
68698da5 | 635 | set_git_dir("."); |
68698da5 JN |
636 | return NULL; |
637 | } | |
638 | ||
f161edeb JN |
639 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
640 | { | |
641 | if (!nongit_ok) | |
642 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
643 | if (chdir(cwd)) | |
644 | die_errno("Cannot come back to cwd"); | |
645 | *nongit_ok = 1; | |
646 | return NULL; | |
647 | } | |
648 | ||
2565b43b | 649 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
650 | { |
651 | struct stat buf; | |
2565b43b CB |
652 | if (stat(path, &buf)) { |
653 | die_errno("failed to stat '%*s%s%s'", | |
654 | prefix_len, | |
60c98d1e JN |
655 | prefix ? prefix : "", |
656 | prefix ? "/" : "", path); | |
2565b43b | 657 | } |
60c98d1e JN |
658 | return buf.st_dev; |
659 | } | |
660 | ||
9e2326c7 | 661 | /* |
1b77d83c MH |
662 | * A "string_list_each_func_t" function that canonicalizes an entry |
663 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
664 | * discards it if unusable. The presence of an empty entry in |
665 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
666 | * subsequent entries. | |
9e2326c7 | 667 | */ |
1b77d83c | 668 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 669 | void *cb_data) |
9e2326c7 | 670 | { |
7ec30aaa | 671 | int *empty_entry_found = cb_data; |
1b77d83c | 672 | char *ceil = item->string; |
9e2326c7 | 673 | |
7ec30aaa MH |
674 | if (!*ceil) { |
675 | *empty_entry_found = 1; | |
9e2326c7 | 676 | return 0; |
7ec30aaa | 677 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 678 | return 0; |
7ec30aaa MH |
679 | } else if (*empty_entry_found) { |
680 | /* Keep entry but do not canonicalize it */ | |
681 | return 1; | |
682 | } else { | |
683 | const char *real_path = real_path_if_valid(ceil); | |
684 | if (!real_path) | |
685 | return 0; | |
686 | free(item->string); | |
687 | item->string = xstrdup(real_path); | |
688 | return 1; | |
689 | } | |
9e2326c7 MH |
690 | } |
691 | ||
e90fdc39 JS |
692 | /* |
693 | * We cannot decide in this function whether we are in the work tree or | |
694 | * not, since the config can only be read _after_ this function was called. | |
695 | */ | |
a60645f9 | 696 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 697 | { |
0454dd93 | 698 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 699 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
7333ed17 | 700 | static struct strbuf cwd = STRBUF_INIT; |
9951d3b3 NTND |
701 | const char *gitdirenv, *ret; |
702 | char *gitfile; | |
7333ed17 | 703 | int offset, offset_parent, ceil_offset = -1; |
c7d1d1b1 RH |
704 | dev_t current_device = 0; |
705 | int one_filesystem = 1; | |
d288a700 | 706 | |
3c8687a7 TA |
707 | /* |
708 | * We may have read an incomplete configuration before | |
709 | * setting-up the git directory. If so, clear the cache so | |
710 | * that the next queries to the configuration reload complete | |
711 | * configuration (including the per-repo config file that we | |
712 | * ignored previously). | |
713 | */ | |
714 | git_config_clear(); | |
715 | ||
af05d679 SG |
716 | /* |
717 | * Let's assume that we are in a git repository. | |
718 | * If it turns out later that we are somewhere else, the value will be | |
719 | * updated accordingly. | |
720 | */ | |
721 | if (nongit_ok) | |
722 | *nongit_ok = 0; | |
723 | ||
7333ed17 | 724 | if (strbuf_getcwd(&cwd)) |
b3f66fd3 | 725 | die_errno("Unable to read current working directory"); |
7333ed17 | 726 | offset = cwd.len; |
b3f66fd3 | 727 | |
e90fdc39 JS |
728 | /* |
729 | * If GIT_DIR is set explicitly, we're not going | |
730 | * to do any discovery, but we still do repository | |
731 | * validation. | |
732 | */ | |
ad1a382f | 733 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 734 | if (gitdirenv) |
7333ed17 | 735 | return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok); |
d288a700 | 736 | |
31171d9e | 737 | if (env_ceiling_dirs) { |
7ec30aaa MH |
738 | int empty_entry_found = 0; |
739 | ||
31171d9e | 740 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 741 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 742 | canonicalize_ceiling_entry, &empty_entry_found); |
7333ed17 | 743 | ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs); |
31171d9e MH |
744 | string_list_clear(&ceiling_dirs, 0); |
745 | } | |
746 | ||
7333ed17 | 747 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf)) |
17d778e7 | 748 | ceil_offset = 1; |
d288a700 | 749 | |
892c41b9 | 750 | /* |
e90fdc39 | 751 | * Test in the following order (relative to the cwd): |
b44ebb19 | 752 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
753 | * - .git/ |
754 | * - ./ (bare) | |
b44ebb19 | 755 | * - ../.git |
e90fdc39 JS |
756 | * - ../.git/ |
757 | * - ../ (bare) | |
758 | * - ../../.git/ | |
759 | * etc. | |
892c41b9 | 760 | */ |
cf87463e | 761 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 762 | if (one_filesystem) |
2565b43b | 763 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 764 | for (;;) { |
13d6ec91 | 765 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
766 | if (gitfile) |
767 | gitdirenv = gitfile = xstrdup(gitfile); | |
768 | else { | |
769 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
770 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
771 | } | |
772 | ||
773 | if (gitdirenv) { | |
774 | ret = setup_discovered_git_dir(gitdirenv, | |
7333ed17 | 775 | &cwd, offset, |
9951d3b3 NTND |
776 | nongit_ok); |
777 | free(gitfile); | |
778 | return ret; | |
779 | } | |
780 | free(gitfile); | |
781 | ||
68698da5 | 782 | if (is_git_directory(".")) |
7333ed17 | 783 | return setup_bare_git_dir(&cwd, offset, nongit_ok); |
1cd8031b | 784 | |
2565b43b | 785 | offset_parent = offset; |
7333ed17 | 786 | while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/'); |
2565b43b | 787 | if (offset_parent <= ceil_offset) |
7333ed17 | 788 | return setup_nongit(cwd.buf, nongit_ok); |
8030e442 | 789 | if (one_filesystem) { |
7333ed17 RS |
790 | dev_t parent_device = get_device_or_die("..", cwd.buf, |
791 | offset); | |
60c98d1e | 792 | if (parent_device != current_device) { |
8030e442 | 793 | if (nongit_ok) { |
7333ed17 | 794 | if (chdir(cwd.buf)) |
8030e442 LD |
795 | die_errno("Cannot come back to cwd"); |
796 | *nongit_ok = 1; | |
797 | return NULL; | |
798 | } | |
7333ed17 | 799 | strbuf_setlen(&cwd, offset); |
2565b43b | 800 | die("Not a git repository (or any parent up to mount point %s)\n" |
7333ed17 RS |
801 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", |
802 | cwd.buf); | |
8030e442 LD |
803 | } |
804 | } | |
502ffe34 | 805 | if (chdir("..")) { |
7333ed17 RS |
806 | strbuf_setlen(&cwd, offset); |
807 | die_errno("Cannot change to '%s/..'", cwd.buf); | |
502ffe34 | 808 | } |
2565b43b | 809 | offset = offset_parent; |
892c41b9 | 810 | } |
d288a700 | 811 | } |
5e7bfe25 | 812 | |
a60645f9 NTND |
813 | const char *setup_git_directory_gently(int *nongit_ok) |
814 | { | |
815 | const char *prefix; | |
816 | ||
817 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f | 818 | if (prefix) |
a6f7f9a3 | 819 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 820 | else |
a6f7f9a3 | 821 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 822 | |
f07d6a1a | 823 | if (startup_info) { |
a60645f9 | 824 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
825 | startup_info->prefix = prefix; |
826 | } | |
a60645f9 NTND |
827 | return prefix; |
828 | } | |
829 | ||
94df2506 JH |
830 | int git_config_perm(const char *var, const char *value) |
831 | { | |
06cbe855 HO |
832 | int i; |
833 | char *endptr; | |
834 | ||
835 | if (value == NULL) | |
836 | return PERM_GROUP; | |
837 | ||
838 | if (!strcmp(value, "umask")) | |
839 | return PERM_UMASK; | |
840 | if (!strcmp(value, "group")) | |
841 | return PERM_GROUP; | |
842 | if (!strcmp(value, "all") || | |
843 | !strcmp(value, "world") || | |
844 | !strcmp(value, "everybody")) | |
845 | return PERM_EVERYBODY; | |
846 | ||
847 | /* Parse octal numbers */ | |
848 | i = strtol(value, &endptr, 8); | |
849 | ||
850 | /* If not an octal number, maybe true/false? */ | |
851 | if (*endptr != 0) | |
852 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
853 | ||
854 | /* | |
855 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 856 | * a chmod value to restrict to. |
06cbe855 HO |
857 | */ |
858 | switch (i) { | |
859 | case PERM_UMASK: /* 0 */ | |
860 | return PERM_UMASK; | |
861 | case OLD_PERM_GROUP: /* 1 */ | |
862 | return PERM_GROUP; | |
863 | case OLD_PERM_EVERYBODY: /* 2 */ | |
864 | return PERM_EVERYBODY; | |
94df2506 | 865 | } |
06cbe855 HO |
866 | |
867 | /* A filemode value was given: 0xxx */ | |
868 | ||
869 | if ((i & 0600) != 0600) | |
870 | die("Problem with core.sharedRepository filemode value " | |
871 | "(0%.3o).\nThe owner of files must always have " | |
872 | "read and write permissions.", i); | |
873 | ||
874 | /* | |
875 | * Mask filemode value. Others can not get write permission. | |
876 | * x flags for directories are handled separately. | |
877 | */ | |
5a688fe4 | 878 | return -(i & 0666); |
94df2506 JH |
879 | } |
880 | ||
ef90d6d4 | 881 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 882 | { |
31e26ebc NTND |
883 | int ret = check_repo_format(var, value, cb); |
884 | if (ret) | |
885 | return ret; | |
886 | if (strcmp(var, "core.bare") == 0) { | |
e90fdc39 JS |
887 | is_bare_repository_cfg = git_config_bool(var, value); |
888 | if (is_bare_repository_cfg == 1) | |
889 | inside_work_tree = -1; | |
890 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
891 | if (!value) |
892 | return config_error_nonbool(var); | |
8e0f7003 | 893 | free(git_work_tree_cfg); |
e90fdc39 JS |
894 | git_work_tree_cfg = xstrdup(value); |
895 | inside_work_tree = -1; | |
896 | } | |
299726d5 | 897 | return 0; |
ab9cb76f JH |
898 | } |
899 | ||
900 | int check_repository_format(void) | |
901 | { | |
337e51ce | 902 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
903 | } |
904 | ||
e1e5ec86 CB |
905 | /* |
906 | * Returns the "prefix", a path to the current working directory | |
907 | * relative to the work tree root, or NULL, if the current working | |
908 | * directory is not a strict subdirectory of the work tree root. The | |
909 | * prefix always ends with a '/' character. | |
910 | */ | |
5e7bfe25 JH |
911 | const char *setup_git_directory(void) |
912 | { | |
b3f66fd3 | 913 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 914 | } |
abc06822 FG |
915 | |
916 | const char *resolve_gitdir(const char *suspect) | |
917 | { | |
918 | if (is_git_directory(suspect)) | |
919 | return suspect; | |
efc5fb6a | 920 | return read_gitfile(suspect); |
abc06822 | 921 | } |
1d999ddd TR |
922 | |
923 | /* if any standard file descriptor is missing open it to /dev/null */ | |
924 | void sanitize_stdfds(void) | |
925 | { | |
926 | int fd = open("/dev/null", O_RDWR, 0); | |
927 | while (fd != -1 && fd < 2) | |
928 | fd = dup(fd); | |
929 | if (fd == -1) | |
930 | die_errno("open /dev/null or dup failed"); | |
931 | if (fd > 2) | |
932 | close(fd); | |
933 | } | |
de0957ce NTND |
934 | |
935 | int daemonize(void) | |
936 | { | |
937 | #ifdef NO_POSIX_GOODIES | |
938 | errno = ENOSYS; | |
939 | return -1; | |
940 | #else | |
941 | switch (fork()) { | |
942 | case 0: | |
943 | break; | |
944 | case -1: | |
945 | die_errno("fork failed"); | |
946 | default: | |
947 | exit(0); | |
948 | } | |
949 | if (setsid() == -1) | |
950 | die_errno("setsid failed"); | |
951 | close(0); | |
952 | close(1); | |
953 | close(2); | |
954 | sanitize_stdfds(); | |
955 | return 0; | |
956 | #endif | |
957 | } |