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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 | |
546e0fd9 | 8 | static char *prefix_path_gently(const char *prefix, int len, const char *path) |
d089ebaa JH |
9 | { |
10 | const char *orig = path; | |
18e051a3 CMAB |
11 | char *sanitized; |
12 | if (is_absolute_path(orig)) { | |
e2a57aac | 13 | const char *temp = real_path(path); |
18e051a3 CMAB |
14 | sanitized = xmalloc(len + strlen(temp) + 1); |
15 | strcpy(sanitized, temp); | |
16 | } else { | |
17 | sanitized = xmalloc(len + strlen(path) + 1); | |
d089ebaa JH |
18 | if (len) |
19 | memcpy(sanitized, prefix, len); | |
20 | strcpy(sanitized + len, path); | |
f332726e | 21 | } |
f3cad0ad | 22 | if (normalize_path_copy(sanitized, sanitized)) |
d089ebaa | 23 | goto error_out; |
9a13ba1b | 24 | if (is_absolute_path(orig)) { |
72ec8ba6 | 25 | size_t root_len, len, total; |
d089ebaa | 26 | const char *work_tree = get_git_work_tree(); |
b3100fd5 JH |
27 | if (!work_tree) |
28 | goto error_out; | |
29 | len = strlen(work_tree); | |
72ec8ba6 | 30 | root_len = offset_1st_component(work_tree); |
b3100fd5 | 31 | total = strlen(sanitized) + 1; |
d089ebaa | 32 | if (strncmp(sanitized, work_tree, len) || |
72ec8ba6 | 33 | (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) { |
d089ebaa | 34 | error_out: |
546e0fd9 JK |
35 | free(sanitized); |
36 | return NULL; | |
d089ebaa JH |
37 | } |
38 | if (sanitized[len] == '/') | |
39 | len++; | |
40 | memmove(sanitized, sanitized + len, total - len); | |
41 | } | |
42 | return sanitized; | |
f332726e LT |
43 | } |
44 | ||
546e0fd9 JK |
45 | char *prefix_path(const char *prefix, int len, const char *path) |
46 | { | |
47 | char *r = prefix_path_gently(prefix, len, path); | |
48 | if (!r) | |
49 | die("'%s' is outside repository", path); | |
50 | return r; | |
51 | } | |
52 | ||
53 | int path_inside_repo(const char *prefix, const char *path) | |
54 | { | |
55 | int len = prefix ? strlen(prefix) : 0; | |
56 | char *r = prefix_path_gently(prefix, len, path); | |
57 | if (r) { | |
58 | free(r); | |
59 | return 1; | |
60 | } | |
61 | return 0; | |
62 | } | |
63 | ||
c6e8c800 JH |
64 | int check_filename(const char *prefix, const char *arg) |
65 | { | |
66 | const char *name; | |
67 | struct stat st; | |
68 | ||
69 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
70 | if (!lstat(name, &st)) | |
71 | return 1; /* file exists */ | |
72 | if (errno == ENOENT || errno == ENOTDIR) | |
73 | return 0; /* file does not exist */ | |
74 | die_errno("failed to stat '%s'", arg); | |
75 | } | |
76 | ||
023e37c3 MM |
77 | static void NORETURN die_verify_filename(const char *prefix, |
78 | const char *arg, | |
79 | int diagnose_misspelt_rev) | |
009fee47 | 80 | { |
023e37c3 MM |
81 | if (!diagnose_misspelt_rev) |
82 | die("%s: no such path in the working tree.\n" | |
4d4b5739 | 83 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally.", |
023e37c3 | 84 | arg); |
0e539dca JH |
85 | /* |
86 | * Saying "'(icase)foo' does not exist in the index" when the | |
87 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
88 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 89 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
90 | */ |
91 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 92 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 93 | |
009fee47 MM |
94 | /* ... or fall back the most general message. */ |
95 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
4d4b5739 MM |
96 | "Use '--' to separate paths from revisions, like this:\n" |
97 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
009fee47 MM |
98 | |
99 | } | |
100 | ||
e23d0b4a LT |
101 | /* |
102 | * Verify a filename that we got as an argument for a pathspec | |
103 | * entry. Note that a filename that begins with "-" never verifies | |
104 | * as true, because even if such a filename were to exist, we want | |
105 | * it to be preceded by the "--" marker (or we want the user to | |
106 | * use a format like "./-filename") | |
023e37c3 MM |
107 | * |
108 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
109 | * diagnosis when dying upon finding that "name" is not a pathname. | |
110 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
111 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
112 | * will only complain about an inexisting file. | |
113 | * | |
114 | * This function is typically called to check that a "file or rev" | |
115 | * argument is unambiguous. In this case, the caller will want | |
116 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
117 | * argument (which could have been a revision), and | |
118 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
119 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 120 | */ |
023e37c3 MM |
121 | void verify_filename(const char *prefix, |
122 | const char *arg, | |
123 | int diagnose_misspelt_rev) | |
e23d0b4a | 124 | { |
e23d0b4a LT |
125 | if (*arg == '-') |
126 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 127 | if (check_filename(prefix, arg)) |
e23d0b4a | 128 | return; |
023e37c3 | 129 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
130 | } |
131 | ||
ea92f41f JH |
132 | /* |
133 | * Opposite of the above: the command line did not have -- marker | |
134 | * and we parsed the arg as a refname. It should not be interpretable | |
135 | * as a filename. | |
136 | */ | |
137 | void verify_non_filename(const char *prefix, const char *arg) | |
138 | { | |
7ae3df8c | 139 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 140 | return; |
ea92f41f JH |
141 | if (*arg == '-') |
142 | return; /* flag */ | |
c6e8c800 JH |
143 | if (!check_filename(prefix, arg)) |
144 | return; | |
145 | die("ambiguous argument '%s': both revision and filename\n" | |
4d4b5739 MM |
146 | "Use '--' to separate paths from revisions, like this:\n" |
147 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
ea92f41f JH |
148 | } |
149 | ||
8a42c985 JH |
150 | /* |
151 | * Magic pathspec | |
152 | * | |
153 | * NEEDSWORK: These need to be moved to dir.h or even to a new | |
154 | * pathspec.h when we restructure get_pathspec() users to use the | |
155 | * "struct pathspec" interface. | |
156 | * | |
157 | * Possible future magic semantics include stuff like: | |
158 | * | |
159 | * { PATHSPEC_NOGLOB, '!', "noglob" }, | |
6d942927 | 160 | * { PATHSPEC_ICASE, '\0', "icase" }, |
8a42c985 JH |
161 | * { PATHSPEC_RECURSIVE, '*', "recursive" }, |
162 | * { PATHSPEC_REGEXP, '\0', "regexp" }, | |
163 | * | |
164 | */ | |
165 | #define PATHSPEC_FROMTOP (1<<0) | |
166 | ||
488201c8 | 167 | static struct pathspec_magic { |
8a42c985 JH |
168 | unsigned bit; |
169 | char mnemonic; /* this cannot be ':'! */ | |
170 | const char *name; | |
171 | } pathspec_magic[] = { | |
172 | { PATHSPEC_FROMTOP, '/', "top" }, | |
173 | }; | |
174 | ||
175 | /* | |
176 | * Take an element of a pathspec and check for magic signatures. | |
177 | * Append the result to the prefix. | |
178 | * | |
179 | * For now, we only parse the syntax and throw out anything other than | |
180 | * "top" magic. | |
181 | * | |
182 | * NEEDSWORK: This needs to be rewritten when we start migrating | |
183 | * get_pathspec() users to use the "struct pathspec" interface. For | |
184 | * example, a pathspec element may be marked as case-insensitive, but | |
185 | * the prefix part must always match literally, and a single stupid | |
186 | * string cannot express such a case. | |
187 | */ | |
488201c8 | 188 | static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt) |
8a42c985 JH |
189 | { |
190 | unsigned magic = 0; | |
191 | const char *copyfrom = elt; | |
6d942927 | 192 | int i; |
8a42c985 JH |
193 | |
194 | if (elt[0] != ':') { | |
195 | ; /* nothing to do */ | |
196 | } else if (elt[1] == '(') { | |
197 | /* longhand */ | |
198 | const char *nextat; | |
199 | for (copyfrom = elt + 2; | |
200 | *copyfrom && *copyfrom != ')'; | |
201 | copyfrom = nextat) { | |
202 | size_t len = strcspn(copyfrom, ",)"); | |
203 | if (copyfrom[len] == ')') | |
204 | nextat = copyfrom + len; | |
205 | else | |
206 | nextat = copyfrom + len + 1; | |
207 | if (!len) | |
208 | continue; | |
209 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) | |
210 | if (strlen(pathspec_magic[i].name) == len && | |
211 | !strncmp(pathspec_magic[i].name, copyfrom, len)) { | |
212 | magic |= pathspec_magic[i].bit; | |
213 | break; | |
214 | } | |
215 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
216 | die("Invalid pathspec magic '%.*s' in '%s'", | |
217 | (int) len, copyfrom, elt); | |
218 | } | |
219 | if (*copyfrom == ')') | |
220 | copyfrom++; | |
221 | } else { | |
222 | /* shorthand */ | |
223 | for (copyfrom = elt + 1; | |
224 | *copyfrom && *copyfrom != ':'; | |
225 | copyfrom++) { | |
226 | char ch = *copyfrom; | |
2f6c9760 JH |
227 | |
228 | if (!is_pathspec_magic(ch)) | |
229 | break; | |
8a42c985 JH |
230 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) |
231 | if (pathspec_magic[i].mnemonic == ch) { | |
232 | magic |= pathspec_magic[i].bit; | |
233 | break; | |
234 | } | |
235 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
2f6c9760 JH |
236 | die("Unimplemented pathspec magic '%c' in '%s'", |
237 | ch, elt); | |
8a42c985 JH |
238 | } |
239 | if (*copyfrom == ':') | |
240 | copyfrom++; | |
241 | } | |
242 | ||
243 | if (magic & PATHSPEC_FROMTOP) | |
6d942927 | 244 | return xstrdup(copyfrom); |
8a42c985 | 245 | else |
6d942927 | 246 | return prefix_path(prefix, prefixlen, copyfrom); |
8a42c985 JH |
247 | } |
248 | ||
6b5ee137 | 249 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 250 | { |
6b5ee137 | 251 | const char *entry = *pathspec; |
d089ebaa | 252 | const char **src, **dst; |
d288a700 LT |
253 | int prefixlen; |
254 | ||
f332726e LT |
255 | if (!prefix && !entry) |
256 | return NULL; | |
d288a700 LT |
257 | |
258 | if (!entry) { | |
259 | static const char *spec[2]; | |
260 | spec[0] = prefix; | |
261 | spec[1] = NULL; | |
262 | return spec; | |
263 | } | |
264 | ||
265 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
266 | src = pathspec; |
267 | dst = pathspec; | |
f332726e | 268 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa | 269 | while (*src) { |
8a42c985 | 270 | *(dst++) = prefix_pathspec(prefix, prefixlen, *src); |
d089ebaa JH |
271 | src++; |
272 | } | |
273 | *dst = NULL; | |
274 | if (!*pathspec) | |
275 | return NULL; | |
276 | return pathspec; | |
d288a700 LT |
277 | } |
278 | ||
5f5608bc | 279 | /* |
ad1a382f | 280 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 281 | * We want to see: |
5f5608bc | 282 | * |
790296fd | 283 | * - either an objects/ directory _or_ the proper |
5f5608bc | 284 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 285 | * - a refs/ directory |
8098a178 | 286 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
287 | * a proper "ref:", or a regular file HEAD that has a properly |
288 | * formatted sha1 object name. | |
5f5608bc | 289 | */ |
b3256eb8 | 290 | int is_git_directory(const char *suspect) |
5f5608bc | 291 | { |
ad1a382f SP |
292 | char path[PATH_MAX]; |
293 | size_t len = strlen(suspect); | |
294 | ||
3c9d0414 GB |
295 | if (PATH_MAX <= len + strlen("/objects")) |
296 | die("Too long path: %.*s", 60, suspect); | |
ad1a382f SP |
297 | strcpy(path, suspect); |
298 | if (getenv(DB_ENVIRONMENT)) { | |
299 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
300 | return 0; | |
301 | } | |
302 | else { | |
303 | strcpy(path + len, "/objects"); | |
304 | if (access(path, X_OK)) | |
305 | return 0; | |
306 | } | |
307 | ||
308 | strcpy(path + len, "/refs"); | |
309 | if (access(path, X_OK)) | |
8098a178 | 310 | return 0; |
ad1a382f SP |
311 | |
312 | strcpy(path + len, "/HEAD"); | |
c847f537 | 313 | if (validate_headref(path)) |
ad1a382f SP |
314 | return 0; |
315 | ||
8098a178 | 316 | return 1; |
5f5608bc LT |
317 | } |
318 | ||
68025633 JS |
319 | int is_inside_git_dir(void) |
320 | { | |
e90fdc39 JS |
321 | if (inside_git_dir < 0) |
322 | inside_git_dir = is_inside_dir(get_git_dir()); | |
323 | return inside_git_dir; | |
892c41b9 ML |
324 | } |
325 | ||
892c41b9 ML |
326 | int is_inside_work_tree(void) |
327 | { | |
e90fdc39 JS |
328 | if (inside_work_tree < 0) |
329 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
330 | return inside_work_tree; | |
892c41b9 ML |
331 | } |
332 | ||
f3fa1838 JH |
333 | void setup_work_tree(void) |
334 | { | |
354e6534 JS |
335 | const char *work_tree, *git_dir; |
336 | static int initialized = 0; | |
337 | ||
338 | if (initialized) | |
339 | return; | |
340 | work_tree = get_git_work_tree(); | |
341 | git_dir = get_git_dir(); | |
59f0f2f3 | 342 | if (!is_absolute_path(git_dir)) |
e2a57aac | 343 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
344 | if (!work_tree || chdir(work_tree)) |
345 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
346 | |
347 | /* | |
348 | * Make sure subsequent git processes find correct worktree | |
349 | * if $GIT_WORK_TREE is set relative | |
350 | */ | |
351 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
352 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
353 | ||
e2a57aac | 354 | set_git_dir(relative_path(git_dir, work_tree)); |
354e6534 | 355 | initialized = 1; |
59f0f2f3 MH |
356 | } |
357 | ||
337e51ce | 358 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 359 | { |
337e51ce NTND |
360 | char repo_config[PATH_MAX+1]; |
361 | ||
362 | /* | |
363 | * git_config() can't be used here because it calls git_pathdup() | |
364 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
365 | * set git_dir to ".git". | |
366 | * | |
367 | * We are in gitdir setup, no git dir has been found useable yet. | |
368 | * Use a gentler version of git_config() to check if this repo | |
369 | * is a good one. | |
370 | */ | |
371 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
372 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
373 | if (GIT_REPO_VERSION < repository_format_version) { |
374 | if (!nongit_ok) | |
375 | die ("Expected git repo version <= %d, found %d", | |
376 | GIT_REPO_VERSION, repository_format_version); | |
377 | warning("Expected git repo version <= %d, found %d", | |
378 | GIT_REPO_VERSION, repository_format_version); | |
379 | warning("Please upgrade Git"); | |
380 | *nongit_ok = -1; | |
381 | return -1; | |
382 | } | |
383 | return 0; | |
384 | } | |
385 | ||
b44ebb19 LH |
386 | /* |
387 | * Try to read the location of the git directory from the .git file, | |
388 | * return path to git directory if found. | |
389 | */ | |
13d6ec91 | 390 | const char *read_gitfile(const char *path) |
b44ebb19 LH |
391 | { |
392 | char *buf; | |
40c813e0 BK |
393 | char *dir; |
394 | const char *slash; | |
b44ebb19 LH |
395 | struct stat st; |
396 | int fd; | |
b1905aea | 397 | ssize_t len; |
b44ebb19 LH |
398 | |
399 | if (stat(path, &st)) | |
400 | return NULL; | |
401 | if (!S_ISREG(st.st_mode)) | |
402 | return NULL; | |
403 | fd = open(path, O_RDONLY); | |
404 | if (fd < 0) | |
d824cbba | 405 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
406 | buf = xmalloc(st.st_size + 1); |
407 | len = read_in_full(fd, buf, st.st_size); | |
408 | close(fd); | |
409 | if (len != st.st_size) | |
410 | die("Error reading %s", path); | |
411 | buf[len] = '\0'; | |
412 | if (prefixcmp(buf, "gitdir: ")) | |
413 | die("Invalid gitfile format: %s", path); | |
414 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
415 | len--; | |
416 | if (len < 9) | |
417 | die("No path in gitfile: %s", path); | |
418 | buf[len] = '\0'; | |
40c813e0 BK |
419 | dir = buf + 8; |
420 | ||
421 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
422 | size_t pathlen = slash+1 - path; | |
423 | size_t dirlen = pathlen + len - 8; | |
424 | dir = xmalloc(dirlen + 1); | |
425 | strncpy(dir, path, pathlen); | |
426 | strncpy(dir + pathlen, buf + 8, len - 8); | |
427 | dir[dirlen] = '\0'; | |
428 | free(buf); | |
429 | buf = dir; | |
430 | } | |
431 | ||
432 | if (!is_git_directory(dir)) | |
433 | die("Not a git repository: %s", dir); | |
e2a57aac | 434 | path = real_path(dir); |
40c813e0 | 435 | |
b44ebb19 LH |
436 | free(buf); |
437 | return path; | |
438 | } | |
439 | ||
e4e30347 | 440 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
b3f66fd3 NTND |
441 | char *cwd, int len, |
442 | int *nongit_ok) | |
e4e30347 | 443 | { |
b3f66fd3 NTND |
444 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
445 | const char *worktree; | |
446 | char *gitfile; | |
9b125da4 | 447 | int offset; |
e4e30347 JN |
448 | |
449 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
450 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 451 | |
13d6ec91 | 452 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
453 | if (gitfile) { |
454 | gitfile = xstrdup(gitfile); | |
455 | gitdirenv = gitfile; | |
456 | } | |
457 | ||
e4e30347 JN |
458 | if (!is_git_directory(gitdirenv)) { |
459 | if (nongit_ok) { | |
460 | *nongit_ok = 1; | |
b3f66fd3 | 461 | free(gitfile); |
e4e30347 JN |
462 | return NULL; |
463 | } | |
464 | die("Not a git repository: '%s'", gitdirenv); | |
465 | } | |
b3f66fd3 NTND |
466 | |
467 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
468 | free(gitfile); | |
469 | return NULL; | |
e4e30347 | 470 | } |
b3f66fd3 NTND |
471 | |
472 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
473 | if (work_tree_env) | |
474 | set_git_work_tree(work_tree_env); | |
475 | else if (is_bare_repository_cfg > 0) { | |
476 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
477 | die("core.bare and core.worktree do not make sense"); | |
478 | ||
479 | /* #18, #26 */ | |
480 | set_git_dir(gitdirenv); | |
481 | free(gitfile); | |
e4e30347 | 482 | return NULL; |
b3f66fd3 NTND |
483 | } |
484 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
485 | if (is_absolute_path(git_work_tree_cfg)) | |
486 | set_git_work_tree(git_work_tree_cfg); | |
487 | else { | |
488 | char core_worktree[PATH_MAX]; | |
489 | if (chdir(gitdirenv)) | |
490 | die_errno("Could not chdir to '%s'", gitdirenv); | |
491 | if (chdir(git_work_tree_cfg)) | |
492 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
493 | if (!getcwd(core_worktree, PATH_MAX)) | |
494 | die_errno("Could not get directory '%s'", git_work_tree_cfg); | |
495 | if (chdir(cwd)) | |
496 | die_errno("Could not come back to cwd"); | |
497 | set_git_work_tree(core_worktree); | |
498 | } | |
499 | } | |
500 | else /* #2, #10 */ | |
501 | set_git_work_tree("."); | |
502 | ||
503 | /* set_git_work_tree() must have been called by now */ | |
504 | worktree = get_git_work_tree(); | |
505 | ||
506 | /* both get_git_work_tree() and cwd are already normalized */ | |
507 | if (!strcmp(cwd, worktree)) { /* cwd == worktree */ | |
508 | set_git_dir(gitdirenv); | |
509 | free(gitfile); | |
e4e30347 | 510 | return NULL; |
b3f66fd3 | 511 | } |
e4e30347 | 512 | |
9b125da4 NTND |
513 | offset = dir_inside_of(cwd, worktree); |
514 | if (offset >= 0) { /* cwd inside worktree? */ | |
e2a57aac | 515 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
516 | if (chdir(worktree)) |
517 | die_errno("Could not chdir to '%s'", worktree); | |
518 | cwd[len++] = '/'; | |
519 | cwd[len] = '\0'; | |
520 | free(gitfile); | |
9b125da4 | 521 | return cwd + offset; |
93a00542 | 522 | } |
b3f66fd3 NTND |
523 | |
524 | /* cwd outside worktree */ | |
525 | set_git_dir(gitdirenv); | |
526 | free(gitfile); | |
527 | return NULL; | |
93a00542 JN |
528 | } |
529 | ||
9951d3b3 NTND |
530 | static const char *setup_discovered_git_dir(const char *gitdir, |
531 | char *cwd, int offset, int len, | |
532 | int *nongit_ok) | |
98937bef | 533 | { |
9951d3b3 NTND |
534 | if (check_repository_format_gently(gitdir, nongit_ok)) |
535 | return NULL; | |
98937bef | 536 | |
4868b2ea JN |
537 | /* --work-tree is set without --git-dir; use discovered one */ |
538 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
539 | if (offset != len && !is_absolute_path(gitdir)) | |
e2a57aac | 540 | gitdir = xstrdup(real_path(gitdir)); |
4868b2ea JN |
541 | if (chdir(cwd)) |
542 | die_errno("Could not come back to cwd"); | |
543 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
544 | } | |
545 | ||
9951d3b3 NTND |
546 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
547 | if (is_bare_repository_cfg > 0) { | |
e2a57aac | 548 | set_git_dir(offset == len ? gitdir : real_path(gitdir)); |
9951d3b3 NTND |
549 | if (chdir(cwd)) |
550 | die_errno("Could not come back to cwd"); | |
98937bef | 551 | return NULL; |
9951d3b3 | 552 | } |
98937bef | 553 | |
9951d3b3 NTND |
554 | /* #0, #1, #5, #8, #9, #12, #13 */ |
555 | set_git_work_tree("."); | |
556 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
557 | set_git_dir(gitdir); | |
98937bef | 558 | inside_git_dir = 0; |
9951d3b3 | 559 | inside_work_tree = 1; |
98937bef NTND |
560 | if (offset == len) |
561 | return NULL; | |
562 | ||
563 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
564 | offset++; | |
565 | cwd[len++] = '/'; | |
566 | cwd[len] = 0; | |
567 | return cwd + offset; | |
568 | } | |
569 | ||
1cd8031b NTND |
570 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
571 | static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok) | |
68698da5 JN |
572 | { |
573 | int root_len; | |
574 | ||
1cd8031b NTND |
575 | if (check_repository_format_gently(".", nongit_ok)) |
576 | return NULL; | |
577 | ||
4868b2ea JN |
578 | /* --work-tree is set without --git-dir; use discovered one */ |
579 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
580 | const char *gitdir; | |
581 | ||
582 | gitdir = offset == len ? "." : xmemdupz(cwd, offset); | |
583 | if (chdir(cwd)) | |
584 | die_errno("Could not come back to cwd"); | |
585 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
586 | } | |
587 | ||
68698da5 | 588 | inside_git_dir = 1; |
1cd8031b | 589 | inside_work_tree = 0; |
68698da5 | 590 | if (offset != len) { |
8fc0ae80 NTND |
591 | if (chdir(cwd)) |
592 | die_errno("Cannot come back to cwd"); | |
68698da5 JN |
593 | root_len = offset_1st_component(cwd); |
594 | cwd[offset > root_len ? offset : root_len] = '\0'; | |
595 | set_git_dir(cwd); | |
337e51ce | 596 | } |
1cd8031b | 597 | else |
68698da5 | 598 | set_git_dir("."); |
68698da5 JN |
599 | return NULL; |
600 | } | |
601 | ||
f161edeb JN |
602 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
603 | { | |
604 | if (!nongit_ok) | |
605 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
606 | if (chdir(cwd)) | |
607 | die_errno("Cannot come back to cwd"); | |
608 | *nongit_ok = 1; | |
609 | return NULL; | |
610 | } | |
611 | ||
2565b43b | 612 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
613 | { |
614 | struct stat buf; | |
2565b43b CB |
615 | if (stat(path, &buf)) { |
616 | die_errno("failed to stat '%*s%s%s'", | |
617 | prefix_len, | |
60c98d1e JN |
618 | prefix ? prefix : "", |
619 | prefix ? "/" : "", path); | |
2565b43b | 620 | } |
60c98d1e JN |
621 | return buf.st_dev; |
622 | } | |
623 | ||
9e2326c7 | 624 | /* |
1b77d83c MH |
625 | * A "string_list_each_func_t" function that canonicalizes an entry |
626 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
627 | * discards it if unusable. The presence of an empty entry in |
628 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
629 | * subsequent entries. | |
9e2326c7 | 630 | */ |
1b77d83c | 631 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 632 | void *cb_data) |
9e2326c7 | 633 | { |
7ec30aaa | 634 | int *empty_entry_found = cb_data; |
1b77d83c | 635 | char *ceil = item->string; |
9e2326c7 | 636 | |
7ec30aaa MH |
637 | if (!*ceil) { |
638 | *empty_entry_found = 1; | |
9e2326c7 | 639 | return 0; |
7ec30aaa | 640 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 641 | return 0; |
7ec30aaa MH |
642 | } else if (*empty_entry_found) { |
643 | /* Keep entry but do not canonicalize it */ | |
644 | return 1; | |
645 | } else { | |
646 | const char *real_path = real_path_if_valid(ceil); | |
647 | if (!real_path) | |
648 | return 0; | |
649 | free(item->string); | |
650 | item->string = xstrdup(real_path); | |
651 | return 1; | |
652 | } | |
9e2326c7 MH |
653 | } |
654 | ||
e90fdc39 JS |
655 | /* |
656 | * We cannot decide in this function whether we are in the work tree or | |
657 | * not, since the config can only be read _after_ this function was called. | |
658 | */ | |
a60645f9 | 659 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 660 | { |
0454dd93 | 661 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 662 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
d288a700 | 663 | static char cwd[PATH_MAX+1]; |
9951d3b3 NTND |
664 | const char *gitdirenv, *ret; |
665 | char *gitfile; | |
31171d9e | 666 | int len, offset, offset_parent, ceil_offset = -1; |
c7d1d1b1 RH |
667 | dev_t current_device = 0; |
668 | int one_filesystem = 1; | |
d288a700 | 669 | |
af05d679 SG |
670 | /* |
671 | * Let's assume that we are in a git repository. | |
672 | * If it turns out later that we are somewhere else, the value will be | |
673 | * updated accordingly. | |
674 | */ | |
675 | if (nongit_ok) | |
676 | *nongit_ok = 0; | |
677 | ||
b3f66fd3 NTND |
678 | if (!getcwd(cwd, sizeof(cwd)-1)) |
679 | die_errno("Unable to read current working directory"); | |
680 | offset = len = strlen(cwd); | |
681 | ||
e90fdc39 JS |
682 | /* |
683 | * If GIT_DIR is set explicitly, we're not going | |
684 | * to do any discovery, but we still do repository | |
685 | * validation. | |
686 | */ | |
ad1a382f | 687 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 688 | if (gitdirenv) |
b3f66fd3 | 689 | return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok); |
d288a700 | 690 | |
31171d9e | 691 | if (env_ceiling_dirs) { |
7ec30aaa MH |
692 | int empty_entry_found = 0; |
693 | ||
31171d9e | 694 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 695 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 696 | canonicalize_ceiling_entry, &empty_entry_found); |
31171d9e MH |
697 | ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs); |
698 | string_list_clear(&ceiling_dirs, 0); | |
699 | } | |
700 | ||
17d778e7 JH |
701 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
702 | ceil_offset = 1; | |
d288a700 | 703 | |
892c41b9 | 704 | /* |
e90fdc39 | 705 | * Test in the following order (relative to the cwd): |
b44ebb19 | 706 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
707 | * - .git/ |
708 | * - ./ (bare) | |
b44ebb19 | 709 | * - ../.git |
e90fdc39 JS |
710 | * - ../.git/ |
711 | * - ../ (bare) | |
712 | * - ../../.git/ | |
713 | * etc. | |
892c41b9 | 714 | */ |
cf87463e | 715 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 716 | if (one_filesystem) |
2565b43b | 717 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 718 | for (;;) { |
13d6ec91 | 719 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
720 | if (gitfile) |
721 | gitdirenv = gitfile = xstrdup(gitfile); | |
722 | else { | |
723 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
724 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
725 | } | |
726 | ||
727 | if (gitdirenv) { | |
728 | ret = setup_discovered_git_dir(gitdirenv, | |
729 | cwd, offset, len, | |
730 | nongit_ok); | |
731 | free(gitfile); | |
732 | return ret; | |
733 | } | |
734 | free(gitfile); | |
735 | ||
68698da5 | 736 | if (is_git_directory(".")) |
1cd8031b NTND |
737 | return setup_bare_git_dir(cwd, offset, len, nongit_ok); |
738 | ||
2565b43b CB |
739 | offset_parent = offset; |
740 | while (--offset_parent > ceil_offset && cwd[offset_parent] != '/'); | |
741 | if (offset_parent <= ceil_offset) | |
f161edeb | 742 | return setup_nongit(cwd, nongit_ok); |
8030e442 | 743 | if (one_filesystem) { |
2565b43b | 744 | dev_t parent_device = get_device_or_die("..", cwd, offset); |
60c98d1e | 745 | if (parent_device != current_device) { |
8030e442 LD |
746 | if (nongit_ok) { |
747 | if (chdir(cwd)) | |
748 | die_errno("Cannot come back to cwd"); | |
749 | *nongit_ok = 1; | |
750 | return NULL; | |
751 | } | |
752 | cwd[offset] = '\0'; | |
2565b43b | 753 | die("Not a git repository (or any parent up to mount point %s)\n" |
cf87463e | 754 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); |
8030e442 LD |
755 | } |
756 | } | |
502ffe34 LD |
757 | if (chdir("..")) { |
758 | cwd[offset] = '\0'; | |
d824cbba | 759 | die_errno("Cannot change to '%s/..'", cwd); |
502ffe34 | 760 | } |
2565b43b | 761 | offset = offset_parent; |
892c41b9 | 762 | } |
d288a700 | 763 | } |
5e7bfe25 | 764 | |
a60645f9 NTND |
765 | const char *setup_git_directory_gently(int *nongit_ok) |
766 | { | |
767 | const char *prefix; | |
768 | ||
769 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f DA |
770 | if (prefix) |
771 | setenv("GIT_PREFIX", prefix, 1); | |
772 | else | |
773 | setenv("GIT_PREFIX", "", 1); | |
774 | ||
f07d6a1a | 775 | if (startup_info) { |
a60645f9 | 776 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
777 | startup_info->prefix = prefix; |
778 | } | |
a60645f9 NTND |
779 | return prefix; |
780 | } | |
781 | ||
94df2506 JH |
782 | int git_config_perm(const char *var, const char *value) |
783 | { | |
06cbe855 HO |
784 | int i; |
785 | char *endptr; | |
786 | ||
787 | if (value == NULL) | |
788 | return PERM_GROUP; | |
789 | ||
790 | if (!strcmp(value, "umask")) | |
791 | return PERM_UMASK; | |
792 | if (!strcmp(value, "group")) | |
793 | return PERM_GROUP; | |
794 | if (!strcmp(value, "all") || | |
795 | !strcmp(value, "world") || | |
796 | !strcmp(value, "everybody")) | |
797 | return PERM_EVERYBODY; | |
798 | ||
799 | /* Parse octal numbers */ | |
800 | i = strtol(value, &endptr, 8); | |
801 | ||
802 | /* If not an octal number, maybe true/false? */ | |
803 | if (*endptr != 0) | |
804 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
805 | ||
806 | /* | |
807 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 808 | * a chmod value to restrict to. |
06cbe855 HO |
809 | */ |
810 | switch (i) { | |
811 | case PERM_UMASK: /* 0 */ | |
812 | return PERM_UMASK; | |
813 | case OLD_PERM_GROUP: /* 1 */ | |
814 | return PERM_GROUP; | |
815 | case OLD_PERM_EVERYBODY: /* 2 */ | |
816 | return PERM_EVERYBODY; | |
94df2506 | 817 | } |
06cbe855 HO |
818 | |
819 | /* A filemode value was given: 0xxx */ | |
820 | ||
821 | if ((i & 0600) != 0600) | |
822 | die("Problem with core.sharedRepository filemode value " | |
823 | "(0%.3o).\nThe owner of files must always have " | |
824 | "read and write permissions.", i); | |
825 | ||
826 | /* | |
827 | * Mask filemode value. Others can not get write permission. | |
828 | * x flags for directories are handled separately. | |
829 | */ | |
5a688fe4 | 830 | return -(i & 0666); |
94df2506 JH |
831 | } |
832 | ||
ef90d6d4 | 833 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 834 | { |
299726d5 JS |
835 | if (strcmp(var, "core.repositoryformatversion") == 0) |
836 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 837 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 838 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
839 | else if (strcmp(var, "core.bare") == 0) { |
840 | is_bare_repository_cfg = git_config_bool(var, value); | |
841 | if (is_bare_repository_cfg == 1) | |
842 | inside_work_tree = -1; | |
843 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
844 | if (!value) |
845 | return config_error_nonbool(var); | |
8e0f7003 | 846 | free(git_work_tree_cfg); |
e90fdc39 JS |
847 | git_work_tree_cfg = xstrdup(value); |
848 | inside_work_tree = -1; | |
849 | } | |
299726d5 | 850 | return 0; |
ab9cb76f JH |
851 | } |
852 | ||
853 | int check_repository_format(void) | |
854 | { | |
337e51ce | 855 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
856 | } |
857 | ||
e1e5ec86 CB |
858 | /* |
859 | * Returns the "prefix", a path to the current working directory | |
860 | * relative to the work tree root, or NULL, if the current working | |
861 | * directory is not a strict subdirectory of the work tree root. The | |
862 | * prefix always ends with a '/' character. | |
863 | */ | |
5e7bfe25 JH |
864 | const char *setup_git_directory(void) |
865 | { | |
b3f66fd3 | 866 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 867 | } |
abc06822 FG |
868 | |
869 | const char *resolve_gitdir(const char *suspect) | |
870 | { | |
871 | if (is_git_directory(suspect)) | |
872 | return suspect; | |
efc5fb6a | 873 | return read_gitfile(suspect); |
abc06822 | 874 | } |