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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; | |
fada7674 | 7 | static int work_tree_config_is_bogus; |
d288a700 | 8 | |
46c3cd44 JK |
9 | static struct startup_info the_startup_info; |
10 | struct startup_info *startup_info = &the_startup_info; | |
11 | ||
ddc2a628 MEW |
12 | /* |
13 | * The input parameter must contain an absolute path, and it must already be | |
14 | * normalized. | |
15 | * | |
16 | * Find the part of an absolute path that lies inside the work tree by | |
17 | * dereferencing symlinks outside the work tree, for example: | |
18 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
19 | * /dir/file (work tree is /) -> dir/file | |
20 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
21 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
22 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
23 | */ | |
24 | static int abspath_part_inside_repo(char *path) | |
25 | { | |
26 | size_t len; | |
27 | size_t wtlen; | |
28 | char *path0; | |
29 | int off; | |
30 | const char *work_tree = get_git_work_tree(); | |
31 | ||
32 | if (!work_tree) | |
33 | return -1; | |
34 | wtlen = strlen(work_tree); | |
35 | len = strlen(path); | |
6127ff63 | 36 | off = offset_1st_component(path); |
ddc2a628 MEW |
37 | |
38 | /* check if work tree is already the prefix */ | |
39 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
40 | if (path[wtlen] == '/') { | |
41 | memmove(path, path + wtlen + 1, len - wtlen); | |
42 | return 0; | |
43 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
44 | /* work tree is the root, or the whole path */ | |
45 | memmove(path, path + wtlen, len - wtlen + 1); | |
46 | return 0; | |
47 | } | |
48 | /* work tree might match beginning of a symlink to work tree */ | |
49 | off = wtlen; | |
50 | } | |
51 | path0 = path; | |
6127ff63 | 52 | path += off; |
ddc2a628 MEW |
53 | |
54 | /* check each '/'-terminated level */ | |
55 | while (*path) { | |
56 | path++; | |
57 | if (*path == '/') { | |
58 | *path = '\0'; | |
59 | if (strcmp(real_path(path0), work_tree) == 0) { | |
60 | memmove(path0, path + 1, len - (path - path0)); | |
61 | return 0; | |
62 | } | |
63 | *path = '/'; | |
64 | } | |
65 | } | |
66 | ||
67 | /* check whole path */ | |
68 | if (strcmp(real_path(path0), work_tree) == 0) { | |
69 | *path0 = '\0'; | |
70 | return 0; | |
71 | } | |
72 | ||
73 | return -1; | |
74 | } | |
75 | ||
645a29c4 NTND |
76 | /* |
77 | * Normalize "path", prepending the "prefix" for relative paths. If | |
78 | * remaining_prefix is not NULL, return the actual prefix still | |
79 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
80 | * | |
81 | * foo -> sub1/sub2/foo (full prefix) | |
82 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
83 | * ../../bar -> bar (no remaining prefix) | |
84 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
85 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
86 | */ | |
87 | char *prefix_path_gently(const char *prefix, int len, | |
88 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
89 | { |
90 | const char *orig = path; | |
18e051a3 CMAB |
91 | char *sanitized; |
92 | if (is_absolute_path(orig)) { | |
3733e694 | 93 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
94 | if (remaining_prefix) |
95 | *remaining_prefix = 0; | |
655ee9ea MEW |
96 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
97 | free(sanitized); | |
98 | return NULL; | |
99 | } | |
100 | if (abspath_part_inside_repo(sanitized)) { | |
101 | free(sanitized); | |
102 | return NULL; | |
103 | } | |
18e051a3 | 104 | } else { |
24041d6b | 105 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", 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 | { | |
e4da43b1 | 137 | char *to_free = NULL; |
c6e8c800 JH |
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; | |
a08cbcda JK |
143 | arg += 2; |
144 | prefix = NULL; | |
145 | } | |
146 | ||
147 | if (prefix) | |
148 | arg = to_free = prefix_filename(prefix, arg); | |
149 | ||
150 | if (!lstat(arg, &st)) { | |
e4da43b1 | 151 | free(to_free); |
c6e8c800 | 152 | return 1; /* file exists */ |
e4da43b1 JK |
153 | } |
154 | if (errno == ENOENT || errno == ENOTDIR) { | |
155 | free(to_free); | |
c6e8c800 | 156 | return 0; /* file does not exist */ |
e4da43b1 | 157 | } |
c6e8c800 JH |
158 | die_errno("failed to stat '%s'", arg); |
159 | } | |
160 | ||
023e37c3 MM |
161 | static void NORETURN die_verify_filename(const char *prefix, |
162 | const char *arg, | |
163 | int diagnose_misspelt_rev) | |
009fee47 | 164 | { |
023e37c3 | 165 | if (!diagnose_misspelt_rev) |
ab33a76e VA |
166 | die(_("%s: no such path in the working tree.\n" |
167 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
023e37c3 | 168 | arg); |
0e539dca JH |
169 | /* |
170 | * Saying "'(icase)foo' does not exist in the index" when the | |
171 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
172 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 173 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
174 | */ |
175 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 176 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 177 | |
009fee47 | 178 | /* ... or fall back the most general message. */ |
ab33a76e VA |
179 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
180 | "Use '--' to separate paths from revisions, like this:\n" | |
181 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
009fee47 MM |
182 | |
183 | } | |
184 | ||
e23d0b4a LT |
185 | /* |
186 | * Verify a filename that we got as an argument for a pathspec | |
187 | * entry. Note that a filename that begins with "-" never verifies | |
188 | * as true, because even if such a filename were to exist, we want | |
189 | * it to be preceded by the "--" marker (or we want the user to | |
190 | * use a format like "./-filename") | |
023e37c3 MM |
191 | * |
192 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
193 | * diagnosis when dying upon finding that "name" is not a pathname. | |
194 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
195 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
196 | * will only complain about an inexisting file. | |
197 | * | |
198 | * This function is typically called to check that a "file or rev" | |
199 | * argument is unambiguous. In this case, the caller will want | |
200 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
201 | * argument (which could have been a revision), and | |
202 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
203 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 204 | */ |
023e37c3 MM |
205 | void verify_filename(const char *prefix, |
206 | const char *arg, | |
207 | int diagnose_misspelt_rev) | |
e23d0b4a | 208 | { |
e23d0b4a LT |
209 | if (*arg == '-') |
210 | die("bad flag '%s' used after filename", arg); | |
df714f81 | 211 | if (check_filename(prefix, arg) || !no_wildcard(arg)) |
e23d0b4a | 212 | return; |
023e37c3 | 213 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
214 | } |
215 | ||
ea92f41f JH |
216 | /* |
217 | * Opposite of the above: the command line did not have -- marker | |
218 | * and we parsed the arg as a refname. It should not be interpretable | |
219 | * as a filename. | |
220 | */ | |
221 | void verify_non_filename(const char *prefix, const char *arg) | |
222 | { | |
7ae3df8c | 223 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 224 | return; |
ea92f41f JH |
225 | if (*arg == '-') |
226 | return; /* flag */ | |
c6e8c800 JH |
227 | if (!check_filename(prefix, arg)) |
228 | return; | |
ab33a76e VA |
229 | die(_("ambiguous argument '%s': both revision and filename\n" |
230 | "Use '--' to separate paths from revisions, like this:\n" | |
231 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
ea92f41f JH |
232 | } |
233 | ||
31e26ebc | 234 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
235 | { |
236 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
237 | if (git_env_common_dir) { | |
238 | strbuf_addstr(sb, git_env_common_dir); | |
239 | return 1; | |
240 | } else { | |
241 | return get_common_dir_noenv(sb, gitdir); | |
242 | } | |
243 | } | |
244 | ||
245 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
246 | { |
247 | struct strbuf data = STRBUF_INIT; | |
248 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 249 | int ret = 0; |
11f9dd71 | 250 | |
4dc4e145 NTND |
251 | strbuf_addf(&path, "%s/commondir", gitdir); |
252 | if (file_exists(path.buf)) { | |
253 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
254 | die_errno(_("failed to read %s"), path.buf); | |
255 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
256 | data.buf[data.len - 1] == '\r')) | |
257 | data.len--; | |
258 | data.buf[data.len] = '\0'; | |
259 | strbuf_reset(&path); | |
260 | if (!is_absolute_path(data.buf)) | |
261 | strbuf_addf(&path, "%s/", gitdir); | |
262 | strbuf_addbuf(&path, &data); | |
33ad9ddd | 263 | strbuf_add_real_path(sb, path.buf); |
31e26ebc | 264 | ret = 1; |
4ac9006f | 265 | } else { |
4dc4e145 | 266 | strbuf_addstr(sb, gitdir); |
4ac9006f BW |
267 | } |
268 | ||
4dc4e145 NTND |
269 | strbuf_release(&data); |
270 | strbuf_release(&path); | |
31e26ebc | 271 | return ret; |
4dc4e145 | 272 | } |
d288a700 | 273 | |
5f5608bc | 274 | /* |
ad1a382f | 275 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 276 | * We want to see: |
5f5608bc | 277 | * |
790296fd | 278 | * - either an objects/ directory _or_ the proper |
5f5608bc | 279 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 280 | * - a refs/ directory |
8098a178 | 281 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
282 | * a proper "ref:", or a regular file HEAD that has a properly |
283 | * formatted sha1 object name. | |
5f5608bc | 284 | */ |
b3256eb8 | 285 | int is_git_directory(const char *suspect) |
5f5608bc | 286 | { |
1d186b6f NTND |
287 | struct strbuf path = STRBUF_INIT; |
288 | int ret = 0; | |
289 | size_t len; | |
ad1a382f | 290 | |
4dc4e145 NTND |
291 | /* Check worktree-related signatures */ |
292 | strbuf_addf(&path, "%s/HEAD", suspect); | |
293 | if (validate_headref(path.buf)) | |
294 | goto done; | |
295 | ||
296 | strbuf_reset(&path); | |
297 | get_common_dir(&path, suspect); | |
1d186b6f | 298 | len = path.len; |
4dc4e145 NTND |
299 | |
300 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
301 | if (getenv(DB_ENVIRONMENT)) { |
302 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 303 | goto done; |
ad1a382f SP |
304 | } |
305 | else { | |
4dc4e145 | 306 | strbuf_setlen(&path, len); |
1d186b6f NTND |
307 | strbuf_addstr(&path, "/objects"); |
308 | if (access(path.buf, X_OK)) | |
309 | goto done; | |
ad1a382f SP |
310 | } |
311 | ||
1d186b6f NTND |
312 | strbuf_setlen(&path, len); |
313 | strbuf_addstr(&path, "/refs"); | |
314 | if (access(path.buf, X_OK)) | |
315 | goto done; | |
ad1a382f | 316 | |
1d186b6f NTND |
317 | ret = 1; |
318 | done: | |
319 | strbuf_release(&path); | |
320 | return ret; | |
5f5608bc LT |
321 | } |
322 | ||
ffd036b1 JK |
323 | int is_nonbare_repository_dir(struct strbuf *path) |
324 | { | |
325 | int ret = 0; | |
326 | int gitfile_error; | |
327 | size_t orig_path_len = path->len; | |
328 | assert(orig_path_len != 0); | |
329 | strbuf_complete(path, '/'); | |
330 | strbuf_addstr(path, ".git"); | |
331 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
332 | ret = 1; | |
333 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
334 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
335 | ret = 1; | |
336 | strbuf_setlen(path, orig_path_len); | |
337 | return ret; | |
338 | } | |
339 | ||
68025633 JS |
340 | int is_inside_git_dir(void) |
341 | { | |
e90fdc39 JS |
342 | if (inside_git_dir < 0) |
343 | inside_git_dir = is_inside_dir(get_git_dir()); | |
344 | return inside_git_dir; | |
892c41b9 ML |
345 | } |
346 | ||
892c41b9 ML |
347 | int is_inside_work_tree(void) |
348 | { | |
e90fdc39 JS |
349 | if (inside_work_tree < 0) |
350 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
351 | return inside_work_tree; | |
892c41b9 ML |
352 | } |
353 | ||
f3fa1838 JH |
354 | void setup_work_tree(void) |
355 | { | |
354e6534 JS |
356 | const char *work_tree, *git_dir; |
357 | static int initialized = 0; | |
358 | ||
359 | if (initialized) | |
360 | return; | |
fada7674 JK |
361 | |
362 | if (work_tree_config_is_bogus) | |
363 | die("unable to set up work tree using invalid config"); | |
364 | ||
354e6534 JS |
365 | work_tree = get_git_work_tree(); |
366 | git_dir = get_git_dir(); | |
59f0f2f3 | 367 | if (!is_absolute_path(git_dir)) |
e2a57aac | 368 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
369 | if (!work_tree || chdir(work_tree)) |
370 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
371 | |
372 | /* | |
373 | * Make sure subsequent git processes find correct worktree | |
374 | * if $GIT_WORK_TREE is set relative | |
375 | */ | |
376 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
377 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
378 | ||
41894ae3 | 379 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 380 | initialized = 1; |
59f0f2f3 MH |
381 | } |
382 | ||
2cc7c2c7 | 383 | static int check_repo_format(const char *var, const char *value, void *vdata) |
31e26ebc | 384 | { |
2cc7c2c7 | 385 | struct repository_format *data = vdata; |
00a09d57 JK |
386 | const char *ext; |
387 | ||
31e26ebc | 388 | if (strcmp(var, "core.repositoryformatversion") == 0) |
2cc7c2c7 | 389 | data->version = git_config_int(var, value); |
00a09d57 JK |
390 | else if (skip_prefix(var, "extensions.", &ext)) { |
391 | /* | |
392 | * record any known extensions here; otherwise, | |
393 | * we fall through to recording it as unknown, and | |
394 | * check_repository_format will complain | |
395 | */ | |
396 | if (!strcmp(ext, "noop")) | |
397 | ; | |
067fbd41 | 398 | else if (!strcmp(ext, "preciousobjects")) |
2cc7c2c7 | 399 | data->precious_objects = git_config_bool(var, value); |
00a09d57 | 400 | else |
2cc7c2c7 | 401 | string_list_append(&data->unknown_extensions, ext); |
652f18ee JK |
402 | } else if (strcmp(var, "core.bare") == 0) { |
403 | data->is_bare = git_config_bool(var, value); | |
404 | } else if (strcmp(var, "core.worktree") == 0) { | |
405 | if (!value) | |
406 | return config_error_nonbool(var); | |
407 | data->work_tree = xstrdup(value); | |
00a09d57 | 408 | } |
31e26ebc NTND |
409 | return 0; |
410 | } | |
411 | ||
337e51ce | 412 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 413 | { |
7d0fb0da | 414 | struct strbuf sb = STRBUF_INIT; |
2cc7c2c7 JK |
415 | struct strbuf err = STRBUF_INIT; |
416 | struct repository_format candidate; | |
652f18ee | 417 | int has_common; |
00a09d57 | 418 | |
652f18ee | 419 | has_common = get_common_dir(&sb, gitdir); |
e61a509a | 420 | strbuf_addstr(&sb, "/config"); |
652f18ee | 421 | read_repository_format(&candidate, sb.buf); |
2cc7c2c7 | 422 | strbuf_release(&sb); |
e61a509a | 423 | |
337e51ce | 424 | /* |
2cc7c2c7 JK |
425 | * For historical use of check_repository_format() in git-init, |
426 | * we treat a missing config as a silent "ok", even when nongit_ok | |
427 | * is unset. | |
337e51ce | 428 | */ |
2cc7c2c7 JK |
429 | if (candidate.version < 0) |
430 | return 0; | |
431 | ||
432 | if (verify_repository_format(&candidate, &err) < 0) { | |
433 | if (nongit_ok) { | |
434 | warning("%s", err.buf); | |
435 | strbuf_release(&err); | |
436 | *nongit_ok = -1; | |
437 | return -1; | |
438 | } | |
439 | die("%s", err.buf); | |
440 | } | |
441 | ||
2cc7c2c7 JK |
442 | repository_format_precious_objects = candidate.precious_objects; |
443 | string_list_clear(&candidate.unknown_extensions, 0); | |
652f18ee JK |
444 | if (!has_common) { |
445 | if (candidate.is_bare != -1) { | |
446 | is_bare_repository_cfg = candidate.is_bare; | |
447 | if (is_bare_repository_cfg == 1) | |
448 | inside_work_tree = -1; | |
449 | } | |
450 | if (candidate.work_tree) { | |
451 | free(git_work_tree_cfg); | |
452 | git_work_tree_cfg = candidate.work_tree; | |
2cc7c2c7 | 453 | inside_work_tree = -1; |
652f18ee JK |
454 | } |
455 | } else { | |
456 | free(candidate.work_tree); | |
2cc7c2c7 JK |
457 | } |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
652f18ee | 462 | int read_repository_format(struct repository_format *format, const char *path) |
2cc7c2c7 JK |
463 | { |
464 | memset(format, 0, sizeof(*format)); | |
465 | format->version = -1; | |
466 | format->is_bare = -1; | |
467 | string_list_init(&format->unknown_extensions, 1); | |
652f18ee | 468 | git_config_from_file(check_repo_format, path, format); |
2cc7c2c7 JK |
469 | return format->version; |
470 | } | |
471 | ||
2cc7c2c7 JK |
472 | int verify_repository_format(const struct repository_format *format, |
473 | struct strbuf *err) | |
474 | { | |
475 | if (GIT_REPO_VERSION_READ < format->version) { | |
274db840 | 476 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
2cc7c2c7 JK |
477 | GIT_REPO_VERSION_READ, format->version); |
478 | return -1; | |
479 | } | |
480 | ||
481 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
00a09d57 JK |
482 | int i; |
483 | ||
274db840 | 484 | strbuf_addstr(err, _("unknown repository extensions found:")); |
00a09d57 | 485 | |
2cc7c2c7 JK |
486 | for (i = 0; i < format->unknown_extensions.nr; i++) |
487 | strbuf_addf(err, "\n\t%s", | |
488 | format->unknown_extensions.items[i].string); | |
489 | return -1; | |
00a09d57 JK |
490 | } |
491 | ||
2cc7c2c7 | 492 | return 0; |
9459aa77 NTND |
493 | } |
494 | ||
5f29433f SB |
495 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
496 | { | |
497 | switch (error_code) { | |
498 | case READ_GITFILE_ERR_STAT_FAILED: | |
499 | case READ_GITFILE_ERR_NOT_A_FILE: | |
500 | /* non-fatal; follow return path */ | |
501 | break; | |
502 | case READ_GITFILE_ERR_OPEN_FAILED: | |
503 | die_errno("Error opening '%s'", path); | |
504 | case READ_GITFILE_ERR_TOO_LARGE: | |
505 | die("Too large to be a .git file: '%s'", path); | |
506 | case READ_GITFILE_ERR_READ_FAILED: | |
507 | die("Error reading %s", path); | |
508 | case READ_GITFILE_ERR_INVALID_FORMAT: | |
509 | die("Invalid gitfile format: %s", path); | |
510 | case READ_GITFILE_ERR_NO_PATH: | |
511 | die("No path in gitfile: %s", path); | |
512 | case READ_GITFILE_ERR_NOT_A_REPO: | |
513 | die("Not a git repository: %s", dir); | |
514 | default: | |
515 | die("BUG: unknown error code"); | |
516 | } | |
517 | } | |
518 | ||
b44ebb19 LH |
519 | /* |
520 | * Try to read the location of the git directory from the .git file, | |
521 | * return path to git directory if found. | |
a93bedad EE |
522 | * |
523 | * On failure, if return_error_code is not NULL, return_error_code | |
524 | * will be set to an error code and NULL will be returned. If | |
525 | * return_error_code is NULL the function will die instead (for most | |
526 | * cases). | |
b44ebb19 | 527 | */ |
a93bedad | 528 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 529 | { |
921bdd96 | 530 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
531 | int error_code = 0; |
532 | char *buf = NULL; | |
533 | char *dir = NULL; | |
40c813e0 | 534 | const char *slash; |
b44ebb19 LH |
535 | struct stat st; |
536 | int fd; | |
b1905aea | 537 | ssize_t len; |
b44ebb19 | 538 | |
a93bedad | 539 | if (stat(path, &st)) { |
5c4003ca | 540 | /* NEEDSWORK: discern between ENOENT vs other errors */ |
a93bedad EE |
541 | error_code = READ_GITFILE_ERR_STAT_FAILED; |
542 | goto cleanup_return; | |
543 | } | |
544 | if (!S_ISREG(st.st_mode)) { | |
545 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
546 | goto cleanup_return; | |
547 | } | |
921bdd96 EE |
548 | if (st.st_size > max_file_size) { |
549 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
550 | goto cleanup_return; | |
551 | } | |
b44ebb19 | 552 | fd = open(path, O_RDONLY); |
a93bedad EE |
553 | if (fd < 0) { |
554 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
555 | goto cleanup_return; | |
556 | } | |
3733e694 | 557 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
558 | len = read_in_full(fd, buf, st.st_size); |
559 | close(fd); | |
a93bedad EE |
560 | if (len != st.st_size) { |
561 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
562 | goto cleanup_return; | |
563 | } | |
a93bedad EE |
564 | if (!starts_with(buf, "gitdir: ")) { |
565 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
566 | goto cleanup_return; | |
567 | } | |
b44ebb19 LH |
568 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
569 | len--; | |
a93bedad EE |
570 | if (len < 9) { |
571 | error_code = READ_GITFILE_ERR_NO_PATH; | |
572 | goto cleanup_return; | |
573 | } | |
b44ebb19 | 574 | buf[len] = '\0'; |
40c813e0 BK |
575 | dir = buf + 8; |
576 | ||
577 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
578 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
579 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
580 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
581 | free(buf); |
582 | buf = dir; | |
583 | } | |
a93bedad EE |
584 | if (!is_git_directory(dir)) { |
585 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
586 | goto cleanup_return; | |
587 | } | |
e2a57aac | 588 | path = real_path(dir); |
40c813e0 | 589 | |
a93bedad | 590 | cleanup_return: |
a93bedad EE |
591 | if (return_error_code) |
592 | *return_error_code = error_code; | |
5f29433f SB |
593 | else if (error_code) |
594 | read_gitfile_error_die(error_code, path, dir); | |
a93bedad | 595 | |
b44ebb19 | 596 | free(buf); |
38ae8784 | 597 | return error_code ? NULL : path; |
b44ebb19 LH |
598 | } |
599 | ||
e4e30347 | 600 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 601 | struct strbuf *cwd, |
b3f66fd3 | 602 | int *nongit_ok) |
e4e30347 | 603 | { |
b3f66fd3 NTND |
604 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
605 | const char *worktree; | |
606 | char *gitfile; | |
9b125da4 | 607 | int offset; |
e4e30347 JN |
608 | |
609 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
610 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 611 | |
13d6ec91 | 612 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
613 | if (gitfile) { |
614 | gitfile = xstrdup(gitfile); | |
615 | gitdirenv = gitfile; | |
616 | } | |
617 | ||
e4e30347 JN |
618 | if (!is_git_directory(gitdirenv)) { |
619 | if (nongit_ok) { | |
620 | *nongit_ok = 1; | |
b3f66fd3 | 621 | free(gitfile); |
e4e30347 JN |
622 | return NULL; |
623 | } | |
624 | die("Not a git repository: '%s'", gitdirenv); | |
625 | } | |
b3f66fd3 NTND |
626 | |
627 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
628 | free(gitfile); | |
629 | return NULL; | |
e4e30347 | 630 | } |
b3f66fd3 NTND |
631 | |
632 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
633 | if (work_tree_env) | |
634 | set_git_work_tree(work_tree_env); | |
635 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
636 | if (git_work_tree_cfg) { |
637 | /* #22.2, #30 */ | |
638 | warning("core.bare and core.worktree do not make sense"); | |
639 | work_tree_config_is_bogus = 1; | |
640 | } | |
b3f66fd3 NTND |
641 | |
642 | /* #18, #26 */ | |
643 | set_git_dir(gitdirenv); | |
644 | free(gitfile); | |
e4e30347 | 645 | return NULL; |
b3f66fd3 NTND |
646 | } |
647 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
648 | if (is_absolute_path(git_work_tree_cfg)) | |
649 | set_git_work_tree(git_work_tree_cfg); | |
650 | else { | |
56b9f6e7 | 651 | char *core_worktree; |
b3f66fd3 NTND |
652 | if (chdir(gitdirenv)) |
653 | die_errno("Could not chdir to '%s'", gitdirenv); | |
654 | if (chdir(git_work_tree_cfg)) | |
655 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 656 | core_worktree = xgetcwd(); |
7333ed17 | 657 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
658 | die_errno("Could not come back to cwd"); |
659 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 660 | free(core_worktree); |
b3f66fd3 NTND |
661 | } |
662 | } | |
2cd83d10 JK |
663 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
664 | /* #16d */ | |
665 | set_git_dir(gitdirenv); | |
666 | free(gitfile); | |
667 | return NULL; | |
668 | } | |
b3f66fd3 NTND |
669 | else /* #2, #10 */ |
670 | set_git_work_tree("."); | |
671 | ||
672 | /* set_git_work_tree() must have been called by now */ | |
673 | worktree = get_git_work_tree(); | |
674 | ||
675 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 676 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
677 | set_git_dir(gitdirenv); |
678 | free(gitfile); | |
e4e30347 | 679 | return NULL; |
b3f66fd3 | 680 | } |
e4e30347 | 681 | |
7333ed17 | 682 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 683 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 684 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
685 | if (chdir(worktree)) |
686 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 687 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 688 | free(gitfile); |
7333ed17 | 689 | return cwd->buf + offset; |
93a00542 | 690 | } |
b3f66fd3 NTND |
691 | |
692 | /* cwd outside worktree */ | |
693 | set_git_dir(gitdirenv); | |
694 | free(gitfile); | |
695 | return NULL; | |
93a00542 JN |
696 | } |
697 | ||
9951d3b3 | 698 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 699 | struct strbuf *cwd, int offset, |
9951d3b3 | 700 | int *nongit_ok) |
98937bef | 701 | { |
9951d3b3 NTND |
702 | if (check_repository_format_gently(gitdir, nongit_ok)) |
703 | return NULL; | |
98937bef | 704 | |
4868b2ea JN |
705 | /* --work-tree is set without --git-dir; use discovered one */ |
706 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
7333ed17 | 707 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
ce83eadd | 708 | gitdir = real_pathdup(gitdir, 1); |
7333ed17 | 709 | if (chdir(cwd->buf)) |
4868b2ea | 710 | die_errno("Could not come back to cwd"); |
7333ed17 | 711 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
712 | } |
713 | ||
9951d3b3 NTND |
714 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
715 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
716 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
717 | if (chdir(cwd->buf)) | |
9951d3b3 | 718 | die_errno("Could not come back to cwd"); |
98937bef | 719 | return NULL; |
9951d3b3 | 720 | } |
98937bef | 721 | |
9951d3b3 NTND |
722 | /* #0, #1, #5, #8, #9, #12, #13 */ |
723 | set_git_work_tree("."); | |
724 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
725 | set_git_dir(gitdir); | |
98937bef | 726 | inside_git_dir = 0; |
9951d3b3 | 727 | inside_work_tree = 1; |
7333ed17 | 728 | if (offset == cwd->len) |
98937bef NTND |
729 | return NULL; |
730 | ||
df380d58 JS |
731 | /* Make "offset" point past the '/' (already the case for root dirs) */ |
732 | if (offset != offset_1st_component(cwd->buf)) | |
733 | offset++; | |
734 | /* Add a '/' at the end */ | |
7333ed17 RS |
735 | strbuf_addch(cwd, '/'); |
736 | return cwd->buf + offset; | |
98937bef NTND |
737 | } |
738 | ||
1cd8031b | 739 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
740 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
741 | int *nongit_ok) | |
68698da5 JN |
742 | { |
743 | int root_len; | |
744 | ||
1cd8031b NTND |
745 | if (check_repository_format_gently(".", nongit_ok)) |
746 | return NULL; | |
747 | ||
2cd83d10 JK |
748 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
749 | ||
4868b2ea JN |
750 | /* --work-tree is set without --git-dir; use discovered one */ |
751 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
752 | const char *gitdir; | |
753 | ||
7333ed17 RS |
754 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
755 | if (chdir(cwd->buf)) | |
4868b2ea | 756 | die_errno("Could not come back to cwd"); |
7333ed17 | 757 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
758 | } |
759 | ||
68698da5 | 760 | inside_git_dir = 1; |
1cd8031b | 761 | inside_work_tree = 0; |
7333ed17 RS |
762 | if (offset != cwd->len) { |
763 | if (chdir(cwd->buf)) | |
8fc0ae80 | 764 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
765 | root_len = offset_1st_component(cwd->buf); |
766 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
767 | set_git_dir(cwd->buf); | |
337e51ce | 768 | } |
1cd8031b | 769 | else |
68698da5 | 770 | set_git_dir("."); |
68698da5 JN |
771 | return NULL; |
772 | } | |
773 | ||
f161edeb JN |
774 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
775 | { | |
776 | if (!nongit_ok) | |
2ff30e67 | 777 | die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT); |
f161edeb | 778 | if (chdir(cwd)) |
2ff30e67 | 779 | die_errno(_("Cannot come back to cwd")); |
f161edeb JN |
780 | *nongit_ok = 1; |
781 | return NULL; | |
782 | } | |
783 | ||
2565b43b | 784 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
785 | { |
786 | struct stat buf; | |
2565b43b CB |
787 | if (stat(path, &buf)) { |
788 | die_errno("failed to stat '%*s%s%s'", | |
789 | prefix_len, | |
60c98d1e JN |
790 | prefix ? prefix : "", |
791 | prefix ? "/" : "", path); | |
2565b43b | 792 | } |
60c98d1e JN |
793 | return buf.st_dev; |
794 | } | |
795 | ||
9e2326c7 | 796 | /* |
1b77d83c MH |
797 | * A "string_list_each_func_t" function that canonicalizes an entry |
798 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
799 | * discards it if unusable. The presence of an empty entry in |
800 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
801 | * subsequent entries. | |
9e2326c7 | 802 | */ |
1b77d83c | 803 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 804 | void *cb_data) |
9e2326c7 | 805 | { |
7ec30aaa | 806 | int *empty_entry_found = cb_data; |
1b77d83c | 807 | char *ceil = item->string; |
9e2326c7 | 808 | |
7ec30aaa MH |
809 | if (!*ceil) { |
810 | *empty_entry_found = 1; | |
9e2326c7 | 811 | return 0; |
7ec30aaa | 812 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 813 | return 0; |
7ec30aaa MH |
814 | } else if (*empty_entry_found) { |
815 | /* Keep entry but do not canonicalize it */ | |
816 | return 1; | |
817 | } else { | |
ce83eadd | 818 | char *real_path = real_pathdup(ceil, 0); |
4ac9006f | 819 | if (!real_path) { |
7ec30aaa | 820 | return 0; |
4ac9006f | 821 | } |
7ec30aaa | 822 | free(item->string); |
4ac9006f | 823 | item->string = real_path; |
7ec30aaa MH |
824 | return 1; |
825 | } | |
9e2326c7 MH |
826 | } |
827 | ||
ce9b8aab JS |
828 | enum discovery_result { |
829 | GIT_DIR_NONE = 0, | |
830 | GIT_DIR_EXPLICIT, | |
831 | GIT_DIR_DISCOVERED, | |
832 | GIT_DIR_BARE, | |
833 | /* these are errors */ | |
834 | GIT_DIR_HIT_CEILING = -1, | |
01017dce JS |
835 | GIT_DIR_HIT_MOUNT_POINT = -2, |
836 | GIT_DIR_INVALID_GITFILE = -3 | |
ce9b8aab JS |
837 | }; |
838 | ||
e90fdc39 JS |
839 | /* |
840 | * We cannot decide in this function whether we are in the work tree or | |
841 | * not, since the config can only be read _after_ this function was called. | |
ce9b8aab JS |
842 | * |
843 | * Also, we avoid changing any global state (such as the current working | |
844 | * directory) to allow early callers. | |
845 | * | |
846 | * The directory where the search should start needs to be passed in via the | |
847 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
848 | * the directory where the search ended, and `gitdir` will contain the path of | |
849 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
850 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
e90fdc39 | 851 | */ |
ce9b8aab | 852 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
01017dce JS |
853 | struct strbuf *gitdir, |
854 | int die_on_error) | |
d288a700 | 855 | { |
0454dd93 | 856 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 857 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
ce9b8aab JS |
858 | const char *gitdirenv; |
859 | int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1; | |
c7d1d1b1 RH |
860 | dev_t current_device = 0; |
861 | int one_filesystem = 1; | |
d288a700 | 862 | |
e90fdc39 JS |
863 | /* |
864 | * If GIT_DIR is set explicitly, we're not going | |
865 | * to do any discovery, but we still do repository | |
866 | * validation. | |
867 | */ | |
ad1a382f | 868 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
ce9b8aab JS |
869 | if (gitdirenv) { |
870 | strbuf_addstr(gitdir, gitdirenv); | |
871 | return GIT_DIR_EXPLICIT; | |
872 | } | |
d288a700 | 873 | |
31171d9e | 874 | if (env_ceiling_dirs) { |
7ec30aaa MH |
875 | int empty_entry_found = 0; |
876 | ||
31171d9e | 877 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 878 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 879 | canonicalize_ceiling_entry, &empty_entry_found); |
ce9b8aab | 880 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
31171d9e MH |
881 | string_list_clear(&ceiling_dirs, 0); |
882 | } | |
883 | ||
ce9b8aab JS |
884 | if (ceil_offset < 0) |
885 | ceil_offset = min_offset - 2; | |
d288a700 | 886 | |
892c41b9 | 887 | /* |
ce9b8aab | 888 | * Test in the following order (relative to the dir): |
b44ebb19 | 889 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
890 | * - .git/ |
891 | * - ./ (bare) | |
b44ebb19 | 892 | * - ../.git |
e90fdc39 JS |
893 | * - ../.git/ |
894 | * - ../ (bare) | |
895 | * - ../../.git/ | |
896 | * etc. | |
892c41b9 | 897 | */ |
cf87463e | 898 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 899 | if (one_filesystem) |
ce9b8aab | 900 | current_device = get_device_or_die(dir->buf, NULL, 0); |
e90fdc39 | 901 | for (;;) { |
01017dce | 902 | int offset = dir->len, error_code = 0; |
ce9b8aab JS |
903 | |
904 | if (offset > min_offset) | |
905 | strbuf_addch(dir, '/'); | |
906 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
01017dce JS |
907 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
908 | NULL : &error_code); | |
909 | if (!gitdirenv) { | |
910 | if (die_on_error || | |
911 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
5c4003ca | 912 | /* NEEDSWORK: fail if .git is not file nor dir */ |
01017dce JS |
913 | if (is_git_directory(dir->buf)) |
914 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
915 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
916 | return GIT_DIR_INVALID_GITFILE; | |
9951d3b3 | 917 | } |
ce9b8aab | 918 | strbuf_setlen(dir, offset); |
9951d3b3 | 919 | if (gitdirenv) { |
ce9b8aab JS |
920 | strbuf_addstr(gitdir, gitdirenv); |
921 | return GIT_DIR_DISCOVERED; | |
9951d3b3 | 922 | } |
9951d3b3 | 923 | |
ce9b8aab JS |
924 | if (is_git_directory(dir->buf)) { |
925 | strbuf_addstr(gitdir, "."); | |
926 | return GIT_DIR_BARE; | |
502ffe34 | 927 | } |
9951d3b3 | 928 | |
ce9b8aab JS |
929 | if (offset <= min_offset) |
930 | return GIT_DIR_HIT_CEILING; | |
1cd8031b | 931 | |
ce9b8aab | 932 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
6c1e6544 | 933 | ; /* continue */ |
ce9b8aab JS |
934 | if (offset <= ceil_offset) |
935 | return GIT_DIR_HIT_CEILING; | |
936 | ||
937 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
938 | if (one_filesystem && | |
939 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
940 | return GIT_DIR_HIT_MOUNT_POINT; | |
892c41b9 | 941 | } |
d288a700 | 942 | } |
5e7bfe25 | 943 | |
16ac8b8d JS |
944 | const char *discover_git_directory(struct strbuf *gitdir) |
945 | { | |
946 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
947 | size_t gitdir_offset = gitdir->len, cwd_len; | |
948 | struct repository_format candidate; | |
949 | ||
950 | if (strbuf_getcwd(&dir)) | |
951 | return NULL; | |
952 | ||
953 | cwd_len = dir.len; | |
01017dce | 954 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { |
16ac8b8d JS |
955 | strbuf_release(&dir); |
956 | return NULL; | |
957 | } | |
958 | ||
959 | /* | |
960 | * The returned gitdir is relative to dir, and if dir does not reflect | |
961 | * the current working directory, we simply make the gitdir absolute. | |
962 | */ | |
963 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
964 | /* Avoid a trailing "/." */ | |
965 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
966 | strbuf_setlen(gitdir, gitdir_offset); | |
967 | else | |
968 | strbuf_addch(&dir, '/'); | |
969 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
970 | } | |
971 | ||
972 | strbuf_reset(&dir); | |
973 | strbuf_addf(&dir, "%s/config", gitdir->buf + gitdir_offset); | |
974 | read_repository_format(&candidate, dir.buf); | |
975 | strbuf_release(&dir); | |
976 | ||
977 | if (verify_repository_format(&candidate, &err) < 0) { | |
978 | warning("ignoring git dir '%s': %s", | |
979 | gitdir->buf + gitdir_offset, err.buf); | |
980 | strbuf_release(&err); | |
981 | return NULL; | |
982 | } | |
983 | ||
984 | return gitdir->buf + gitdir_offset; | |
985 | } | |
986 | ||
a60645f9 NTND |
987 | const char *setup_git_directory_gently(int *nongit_ok) |
988 | { | |
ce9b8aab JS |
989 | static struct strbuf cwd = STRBUF_INIT; |
990 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
b58a68c1 | 991 | const char *prefix, *env_prefix; |
a60645f9 | 992 | |
ce9b8aab JS |
993 | /* |
994 | * We may have read an incomplete configuration before | |
995 | * setting-up the git directory. If so, clear the cache so | |
996 | * that the next queries to the configuration reload complete | |
997 | * configuration (including the per-repo config file that we | |
998 | * ignored previously). | |
999 | */ | |
1000 | git_config_clear(); | |
1001 | ||
1002 | /* | |
1003 | * Let's assume that we are in a git repository. | |
1004 | * If it turns out later that we are somewhere else, the value will be | |
1005 | * updated accordingly. | |
1006 | */ | |
1007 | if (nongit_ok) | |
1008 | *nongit_ok = 0; | |
1009 | ||
1010 | if (strbuf_getcwd(&cwd)) | |
1011 | die_errno(_("Unable to read current working directory")); | |
1012 | strbuf_addbuf(&dir, &cwd); | |
1013 | ||
01017dce | 1014 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { |
ce9b8aab JS |
1015 | case GIT_DIR_NONE: |
1016 | prefix = NULL; | |
1017 | break; | |
1018 | case GIT_DIR_EXPLICIT: | |
1019 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, nongit_ok); | |
1020 | break; | |
1021 | case GIT_DIR_DISCOVERED: | |
1022 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1023 | die(_("Cannot change to '%s'"), dir.buf); | |
1024 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, | |
1025 | nongit_ok); | |
1026 | break; | |
1027 | case GIT_DIR_BARE: | |
1028 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1029 | die(_("Cannot change to '%s'"), dir.buf); | |
1030 | prefix = setup_bare_git_dir(&cwd, dir.len, nongit_ok); | |
1031 | break; | |
1032 | case GIT_DIR_HIT_CEILING: | |
1033 | prefix = setup_nongit(cwd.buf, nongit_ok); | |
1034 | break; | |
1035 | case GIT_DIR_HIT_MOUNT_POINT: | |
1036 | if (nongit_ok) { | |
1037 | *nongit_ok = 1; | |
1038 | strbuf_release(&cwd); | |
1039 | strbuf_release(&dir); | |
1040 | return NULL; | |
1041 | } | |
1042 | die(_("Not a git repository (or any parent up to mount point %s)\n" | |
1043 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1044 | dir.buf); | |
1045 | default: | |
1046 | die("BUG: unhandled setup_git_directory_1() result"); | |
1047 | } | |
1048 | ||
3736c925 | 1049 | env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT); |
b58a68c1 BW |
1050 | if (env_prefix) |
1051 | prefix = env_prefix; | |
1052 | ||
1f5d271f | 1053 | if (prefix) |
a6f7f9a3 | 1054 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 1055 | else |
a6f7f9a3 | 1056 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 1057 | |
46c3cd44 JK |
1058 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
1059 | startup_info->prefix = prefix; | |
1060 | ||
ce9b8aab JS |
1061 | strbuf_release(&dir); |
1062 | strbuf_release(&gitdir); | |
1063 | ||
a60645f9 NTND |
1064 | return prefix; |
1065 | } | |
1066 | ||
94df2506 JH |
1067 | int git_config_perm(const char *var, const char *value) |
1068 | { | |
06cbe855 HO |
1069 | int i; |
1070 | char *endptr; | |
1071 | ||
1072 | if (value == NULL) | |
1073 | return PERM_GROUP; | |
1074 | ||
1075 | if (!strcmp(value, "umask")) | |
1076 | return PERM_UMASK; | |
1077 | if (!strcmp(value, "group")) | |
1078 | return PERM_GROUP; | |
1079 | if (!strcmp(value, "all") || | |
1080 | !strcmp(value, "world") || | |
1081 | !strcmp(value, "everybody")) | |
1082 | return PERM_EVERYBODY; | |
1083 | ||
1084 | /* Parse octal numbers */ | |
1085 | i = strtol(value, &endptr, 8); | |
1086 | ||
1087 | /* If not an octal number, maybe true/false? */ | |
1088 | if (*endptr != 0) | |
1089 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1090 | ||
1091 | /* | |
1092 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 1093 | * a chmod value to restrict to. |
06cbe855 HO |
1094 | */ |
1095 | switch (i) { | |
1096 | case PERM_UMASK: /* 0 */ | |
1097 | return PERM_UMASK; | |
1098 | case OLD_PERM_GROUP: /* 1 */ | |
1099 | return PERM_GROUP; | |
1100 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1101 | return PERM_EVERYBODY; | |
94df2506 | 1102 | } |
06cbe855 HO |
1103 | |
1104 | /* A filemode value was given: 0xxx */ | |
1105 | ||
1106 | if ((i & 0600) != 0600) | |
2ff30e67 | 1107 | die(_("Problem with core.sharedRepository filemode value " |
06cbe855 | 1108 | "(0%.3o).\nThe owner of files must always have " |
2ff30e67 | 1109 | "read and write permissions."), i); |
06cbe855 HO |
1110 | |
1111 | /* | |
1112 | * Mask filemode value. Others can not get write permission. | |
1113 | * x flags for directories are handled separately. | |
1114 | */ | |
5a688fe4 | 1115 | return -(i & 0666); |
94df2506 JH |
1116 | } |
1117 | ||
4b0d1eeb | 1118 | void check_repository_format(void) |
ab9cb76f | 1119 | { |
f1c126bd JK |
1120 | check_repository_format_gently(get_git_dir(), NULL); |
1121 | startup_info->have_repository = 1; | |
ab9cb76f JH |
1122 | } |
1123 | ||
e1e5ec86 CB |
1124 | /* |
1125 | * Returns the "prefix", a path to the current working directory | |
1126 | * relative to the work tree root, or NULL, if the current working | |
1127 | * directory is not a strict subdirectory of the work tree root. The | |
1128 | * prefix always ends with a '/' character. | |
1129 | */ | |
5e7bfe25 JH |
1130 | const char *setup_git_directory(void) |
1131 | { | |
b3f66fd3 | 1132 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 1133 | } |
abc06822 | 1134 | |
40d96325 | 1135 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
abc06822 FG |
1136 | { |
1137 | if (is_git_directory(suspect)) | |
1138 | return suspect; | |
40d96325 | 1139 | return read_gitfile_gently(suspect, return_error_code); |
abc06822 | 1140 | } |
1d999ddd TR |
1141 | |
1142 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1143 | void sanitize_stdfds(void) | |
1144 | { | |
1145 | int fd = open("/dev/null", O_RDWR, 0); | |
1146 | while (fd != -1 && fd < 2) | |
1147 | fd = dup(fd); | |
1148 | if (fd == -1) | |
1149 | die_errno("open /dev/null or dup failed"); | |
1150 | if (fd > 2) | |
1151 | close(fd); | |
1152 | } | |
de0957ce NTND |
1153 | |
1154 | int daemonize(void) | |
1155 | { | |
1156 | #ifdef NO_POSIX_GOODIES | |
1157 | errno = ENOSYS; | |
1158 | return -1; | |
1159 | #else | |
1160 | switch (fork()) { | |
1161 | case 0: | |
1162 | break; | |
1163 | case -1: | |
1164 | die_errno("fork failed"); | |
1165 | default: | |
1166 | exit(0); | |
1167 | } | |
1168 | if (setsid() == -1) | |
1169 | die_errno("setsid failed"); | |
1170 | close(0); | |
1171 | close(1); | |
1172 | close(2); | |
1173 | sanitize_stdfds(); | |
1174 | return 0; | |
1175 | #endif | |
1176 | } |