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Commit | Line | Data |
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d288a700 | 1 | #include "cache.h" |
e90fdc39 | 2 | #include "dir.h" |
31171d9e | 3 | #include "string-list.h" |
e90fdc39 JS |
4 | |
5 | static int inside_git_dir = -1; | |
6 | static int inside_work_tree = -1; | |
d288a700 | 7 | |
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 | ||
4db86e8b NTND |
69 | if (!prefixcmp(arg, ":/")) { |
70 | if (arg[2] == '\0') /* ":/" is root dir, always exists */ | |
71 | return 1; | |
72 | name = arg + 2; | |
73 | } else if (prefix) | |
74 | name = prefix_filename(prefix, strlen(prefix), arg); | |
75 | else | |
76 | name = arg; | |
c6e8c800 JH |
77 | if (!lstat(name, &st)) |
78 | return 1; /* file exists */ | |
79 | if (errno == ENOENT || errno == ENOTDIR) | |
80 | return 0; /* file does not exist */ | |
81 | die_errno("failed to stat '%s'", arg); | |
82 | } | |
83 | ||
023e37c3 MM |
84 | static void NORETURN die_verify_filename(const char *prefix, |
85 | const char *arg, | |
86 | int diagnose_misspelt_rev) | |
009fee47 | 87 | { |
023e37c3 MM |
88 | if (!diagnose_misspelt_rev) |
89 | die("%s: no such path in the working tree.\n" | |
4d4b5739 | 90 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally.", |
023e37c3 | 91 | arg); |
0e539dca JH |
92 | /* |
93 | * Saying "'(icase)foo' does not exist in the index" when the | |
94 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
95 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 96 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
97 | */ |
98 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 99 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 100 | |
009fee47 MM |
101 | /* ... or fall back the most general message. */ |
102 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
4d4b5739 MM |
103 | "Use '--' to separate paths from revisions, like this:\n" |
104 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
009fee47 MM |
105 | |
106 | } | |
107 | ||
e23d0b4a LT |
108 | /* |
109 | * Verify a filename that we got as an argument for a pathspec | |
110 | * entry. Note that a filename that begins with "-" never verifies | |
111 | * as true, because even if such a filename were to exist, we want | |
112 | * it to be preceded by the "--" marker (or we want the user to | |
113 | * use a format like "./-filename") | |
023e37c3 MM |
114 | * |
115 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
116 | * diagnosis when dying upon finding that "name" is not a pathname. | |
117 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
118 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
119 | * will only complain about an inexisting file. | |
120 | * | |
121 | * This function is typically called to check that a "file or rev" | |
122 | * argument is unambiguous. In this case, the caller will want | |
123 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
124 | * argument (which could have been a revision), and | |
125 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
126 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 127 | */ |
023e37c3 MM |
128 | void verify_filename(const char *prefix, |
129 | const char *arg, | |
130 | int diagnose_misspelt_rev) | |
e23d0b4a | 131 | { |
e23d0b4a LT |
132 | if (*arg == '-') |
133 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 134 | if (check_filename(prefix, arg)) |
e23d0b4a | 135 | return; |
023e37c3 | 136 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
137 | } |
138 | ||
ea92f41f JH |
139 | /* |
140 | * Opposite of the above: the command line did not have -- marker | |
141 | * and we parsed the arg as a refname. It should not be interpretable | |
142 | * as a filename. | |
143 | */ | |
144 | void verify_non_filename(const char *prefix, const char *arg) | |
145 | { | |
7ae3df8c | 146 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 147 | return; |
ea92f41f JH |
148 | if (*arg == '-') |
149 | return; /* flag */ | |
c6e8c800 JH |
150 | if (!check_filename(prefix, arg)) |
151 | return; | |
152 | die("ambiguous argument '%s': both revision and filename\n" | |
4d4b5739 MM |
153 | "Use '--' to separate paths from revisions, like this:\n" |
154 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
ea92f41f JH |
155 | } |
156 | ||
8a42c985 JH |
157 | /* |
158 | * Magic pathspec | |
159 | * | |
160 | * NEEDSWORK: These need to be moved to dir.h or even to a new | |
161 | * pathspec.h when we restructure get_pathspec() users to use the | |
162 | * "struct pathspec" interface. | |
163 | * | |
164 | * Possible future magic semantics include stuff like: | |
165 | * | |
166 | * { PATHSPEC_NOGLOB, '!', "noglob" }, | |
6d942927 | 167 | * { PATHSPEC_ICASE, '\0', "icase" }, |
8a42c985 JH |
168 | * { PATHSPEC_RECURSIVE, '*', "recursive" }, |
169 | * { PATHSPEC_REGEXP, '\0', "regexp" }, | |
170 | * | |
171 | */ | |
172 | #define PATHSPEC_FROMTOP (1<<0) | |
173 | ||
488201c8 | 174 | static struct pathspec_magic { |
8a42c985 JH |
175 | unsigned bit; |
176 | char mnemonic; /* this cannot be ':'! */ | |
177 | const char *name; | |
178 | } pathspec_magic[] = { | |
179 | { PATHSPEC_FROMTOP, '/', "top" }, | |
180 | }; | |
181 | ||
182 | /* | |
183 | * Take an element of a pathspec and check for magic signatures. | |
184 | * Append the result to the prefix. | |
185 | * | |
186 | * For now, we only parse the syntax and throw out anything other than | |
187 | * "top" magic. | |
188 | * | |
189 | * NEEDSWORK: This needs to be rewritten when we start migrating | |
190 | * get_pathspec() users to use the "struct pathspec" interface. For | |
191 | * example, a pathspec element may be marked as case-insensitive, but | |
192 | * the prefix part must always match literally, and a single stupid | |
193 | * string cannot express such a case. | |
194 | */ | |
488201c8 | 195 | static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt) |
8a42c985 JH |
196 | { |
197 | unsigned magic = 0; | |
198 | const char *copyfrom = elt; | |
6d942927 | 199 | int i; |
8a42c985 JH |
200 | |
201 | if (elt[0] != ':') { | |
202 | ; /* nothing to do */ | |
203 | } else if (elt[1] == '(') { | |
204 | /* longhand */ | |
205 | const char *nextat; | |
206 | for (copyfrom = elt + 2; | |
207 | *copyfrom && *copyfrom != ')'; | |
208 | copyfrom = nextat) { | |
209 | size_t len = strcspn(copyfrom, ",)"); | |
772e47cd | 210 | if (copyfrom[len] == ',') |
8a42c985 | 211 | nextat = copyfrom + len + 1; |
772e47cd AW |
212 | else |
213 | /* handle ')' and '\0' */ | |
214 | nextat = copyfrom + len; | |
8a42c985 JH |
215 | if (!len) |
216 | continue; | |
217 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) | |
218 | if (strlen(pathspec_magic[i].name) == len && | |
219 | !strncmp(pathspec_magic[i].name, copyfrom, len)) { | |
220 | magic |= pathspec_magic[i].bit; | |
221 | break; | |
222 | } | |
223 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
224 | die("Invalid pathspec magic '%.*s' in '%s'", | |
225 | (int) len, copyfrom, elt); | |
226 | } | |
f612a67e AW |
227 | if (*copyfrom != ')') |
228 | die("Missing ')' at the end of pathspec magic in '%s'", elt); | |
229 | copyfrom++; | |
8a42c985 JH |
230 | } else { |
231 | /* shorthand */ | |
232 | for (copyfrom = elt + 1; | |
233 | *copyfrom && *copyfrom != ':'; | |
234 | copyfrom++) { | |
235 | char ch = *copyfrom; | |
2f6c9760 JH |
236 | |
237 | if (!is_pathspec_magic(ch)) | |
238 | break; | |
8a42c985 JH |
239 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) |
240 | if (pathspec_magic[i].mnemonic == ch) { | |
241 | magic |= pathspec_magic[i].bit; | |
242 | break; | |
243 | } | |
244 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
2f6c9760 JH |
245 | die("Unimplemented pathspec magic '%c' in '%s'", |
246 | ch, elt); | |
8a42c985 JH |
247 | } |
248 | if (*copyfrom == ':') | |
249 | copyfrom++; | |
250 | } | |
251 | ||
252 | if (magic & PATHSPEC_FROMTOP) | |
6d942927 | 253 | return xstrdup(copyfrom); |
8a42c985 | 254 | else |
6d942927 | 255 | return prefix_path(prefix, prefixlen, copyfrom); |
8a42c985 JH |
256 | } |
257 | ||
1794e6e0 AS |
258 | /* |
259 | * N.B. get_pathspec() is deprecated in favor of the "struct pathspec" | |
260 | * based interface - see pathspec_magic above. | |
261 | * | |
262 | * Arguments: | |
263 | * - prefix - a path relative to the root of the working tree | |
264 | * - pathspec - a list of paths underneath the prefix path | |
265 | * | |
266 | * Iterates over pathspec, prepending each path with prefix, | |
267 | * and return the resulting list. | |
268 | * | |
269 | * If pathspec is empty, return a singleton list containing prefix. | |
270 | * | |
271 | * If pathspec and prefix are both empty, return an empty list. | |
272 | * | |
273 | * This is typically used by built-in commands such as add.c, in order | |
274 | * to normalize argv arguments provided to the built-in into a list of | |
275 | * paths to process, all relative to the root of the working tree. | |
276 | */ | |
6b5ee137 | 277 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 278 | { |
6b5ee137 | 279 | const char *entry = *pathspec; |
d089ebaa | 280 | const char **src, **dst; |
d288a700 LT |
281 | int prefixlen; |
282 | ||
f332726e LT |
283 | if (!prefix && !entry) |
284 | return NULL; | |
d288a700 LT |
285 | |
286 | if (!entry) { | |
287 | static const char *spec[2]; | |
288 | spec[0] = prefix; | |
289 | spec[1] = NULL; | |
290 | return spec; | |
291 | } | |
292 | ||
293 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
294 | src = pathspec; |
295 | dst = pathspec; | |
f332726e | 296 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa | 297 | while (*src) { |
8a42c985 | 298 | *(dst++) = prefix_pathspec(prefix, prefixlen, *src); |
d089ebaa JH |
299 | src++; |
300 | } | |
301 | *dst = NULL; | |
302 | if (!*pathspec) | |
303 | return NULL; | |
304 | return pathspec; | |
d288a700 LT |
305 | } |
306 | ||
5f5608bc | 307 | /* |
ad1a382f | 308 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 309 | * We want to see: |
5f5608bc | 310 | * |
790296fd | 311 | * - either an objects/ directory _or_ the proper |
5f5608bc | 312 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 313 | * - a refs/ directory |
8098a178 | 314 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
315 | * a proper "ref:", or a regular file HEAD that has a properly |
316 | * formatted sha1 object name. | |
5f5608bc | 317 | */ |
b3256eb8 | 318 | int is_git_directory(const char *suspect) |
5f5608bc | 319 | { |
ad1a382f SP |
320 | char path[PATH_MAX]; |
321 | size_t len = strlen(suspect); | |
322 | ||
3c9d0414 GB |
323 | if (PATH_MAX <= len + strlen("/objects")) |
324 | die("Too long path: %.*s", 60, suspect); | |
ad1a382f SP |
325 | strcpy(path, suspect); |
326 | if (getenv(DB_ENVIRONMENT)) { | |
327 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
328 | return 0; | |
329 | } | |
330 | else { | |
331 | strcpy(path + len, "/objects"); | |
332 | if (access(path, X_OK)) | |
333 | return 0; | |
334 | } | |
335 | ||
336 | strcpy(path + len, "/refs"); | |
337 | if (access(path, X_OK)) | |
8098a178 | 338 | return 0; |
ad1a382f SP |
339 | |
340 | strcpy(path + len, "/HEAD"); | |
c847f537 | 341 | if (validate_headref(path)) |
ad1a382f SP |
342 | return 0; |
343 | ||
8098a178 | 344 | return 1; |
5f5608bc LT |
345 | } |
346 | ||
68025633 JS |
347 | int is_inside_git_dir(void) |
348 | { | |
e90fdc39 JS |
349 | if (inside_git_dir < 0) |
350 | inside_git_dir = is_inside_dir(get_git_dir()); | |
351 | return inside_git_dir; | |
892c41b9 ML |
352 | } |
353 | ||
892c41b9 ML |
354 | int is_inside_work_tree(void) |
355 | { | |
e90fdc39 JS |
356 | if (inside_work_tree < 0) |
357 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
358 | return inside_work_tree; | |
892c41b9 ML |
359 | } |
360 | ||
f3fa1838 JH |
361 | void setup_work_tree(void) |
362 | { | |
354e6534 JS |
363 | const char *work_tree, *git_dir; |
364 | static int initialized = 0; | |
365 | ||
366 | if (initialized) | |
367 | return; | |
368 | work_tree = get_git_work_tree(); | |
369 | git_dir = get_git_dir(); | |
59f0f2f3 | 370 | if (!is_absolute_path(git_dir)) |
e2a57aac | 371 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
372 | if (!work_tree || chdir(work_tree)) |
373 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
374 | |
375 | /* | |
376 | * Make sure subsequent git processes find correct worktree | |
377 | * if $GIT_WORK_TREE is set relative | |
378 | */ | |
379 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
380 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
381 | ||
e2a57aac | 382 | set_git_dir(relative_path(git_dir, work_tree)); |
354e6534 | 383 | initialized = 1; |
59f0f2f3 MH |
384 | } |
385 | ||
337e51ce | 386 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 387 | { |
337e51ce NTND |
388 | char repo_config[PATH_MAX+1]; |
389 | ||
390 | /* | |
391 | * git_config() can't be used here because it calls git_pathdup() | |
392 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
393 | * set git_dir to ".git". | |
394 | * | |
395 | * We are in gitdir setup, no git dir has been found useable yet. | |
396 | * Use a gentler version of git_config() to check if this repo | |
397 | * is a good one. | |
398 | */ | |
399 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
400 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
401 | if (GIT_REPO_VERSION < repository_format_version) { |
402 | if (!nongit_ok) | |
403 | die ("Expected git repo version <= %d, found %d", | |
404 | GIT_REPO_VERSION, repository_format_version); | |
405 | warning("Expected git repo version <= %d, found %d", | |
406 | GIT_REPO_VERSION, repository_format_version); | |
407 | warning("Please upgrade Git"); | |
408 | *nongit_ok = -1; | |
409 | return -1; | |
410 | } | |
411 | return 0; | |
412 | } | |
413 | ||
b44ebb19 LH |
414 | /* |
415 | * Try to read the location of the git directory from the .git file, | |
416 | * return path to git directory if found. | |
417 | */ | |
13d6ec91 | 418 | const char *read_gitfile(const char *path) |
b44ebb19 LH |
419 | { |
420 | char *buf; | |
40c813e0 BK |
421 | char *dir; |
422 | const char *slash; | |
b44ebb19 LH |
423 | struct stat st; |
424 | int fd; | |
b1905aea | 425 | ssize_t len; |
b44ebb19 LH |
426 | |
427 | if (stat(path, &st)) | |
428 | return NULL; | |
429 | if (!S_ISREG(st.st_mode)) | |
430 | return NULL; | |
431 | fd = open(path, O_RDONLY); | |
432 | if (fd < 0) | |
d824cbba | 433 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
434 | buf = xmalloc(st.st_size + 1); |
435 | len = read_in_full(fd, buf, st.st_size); | |
436 | close(fd); | |
437 | if (len != st.st_size) | |
438 | die("Error reading %s", path); | |
439 | buf[len] = '\0'; | |
440 | if (prefixcmp(buf, "gitdir: ")) | |
441 | die("Invalid gitfile format: %s", path); | |
442 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
443 | len--; | |
444 | if (len < 9) | |
445 | die("No path in gitfile: %s", path); | |
446 | buf[len] = '\0'; | |
40c813e0 BK |
447 | dir = buf + 8; |
448 | ||
449 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
450 | size_t pathlen = slash+1 - path; | |
451 | size_t dirlen = pathlen + len - 8; | |
452 | dir = xmalloc(dirlen + 1); | |
453 | strncpy(dir, path, pathlen); | |
454 | strncpy(dir + pathlen, buf + 8, len - 8); | |
455 | dir[dirlen] = '\0'; | |
456 | free(buf); | |
457 | buf = dir; | |
458 | } | |
459 | ||
460 | if (!is_git_directory(dir)) | |
461 | die("Not a git repository: %s", dir); | |
e2a57aac | 462 | path = real_path(dir); |
40c813e0 | 463 | |
b44ebb19 LH |
464 | free(buf); |
465 | return path; | |
466 | } | |
467 | ||
e4e30347 | 468 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
b3f66fd3 NTND |
469 | char *cwd, int len, |
470 | int *nongit_ok) | |
e4e30347 | 471 | { |
b3f66fd3 NTND |
472 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
473 | const char *worktree; | |
474 | char *gitfile; | |
9b125da4 | 475 | int offset; |
e4e30347 JN |
476 | |
477 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
478 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 479 | |
13d6ec91 | 480 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
481 | if (gitfile) { |
482 | gitfile = xstrdup(gitfile); | |
483 | gitdirenv = gitfile; | |
484 | } | |
485 | ||
e4e30347 JN |
486 | if (!is_git_directory(gitdirenv)) { |
487 | if (nongit_ok) { | |
488 | *nongit_ok = 1; | |
b3f66fd3 | 489 | free(gitfile); |
e4e30347 JN |
490 | return NULL; |
491 | } | |
492 | die("Not a git repository: '%s'", gitdirenv); | |
493 | } | |
b3f66fd3 NTND |
494 | |
495 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
496 | free(gitfile); | |
497 | return NULL; | |
e4e30347 | 498 | } |
b3f66fd3 NTND |
499 | |
500 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
501 | if (work_tree_env) | |
502 | set_git_work_tree(work_tree_env); | |
503 | else if (is_bare_repository_cfg > 0) { | |
504 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
505 | die("core.bare and core.worktree do not make sense"); | |
506 | ||
507 | /* #18, #26 */ | |
508 | set_git_dir(gitdirenv); | |
509 | free(gitfile); | |
e4e30347 | 510 | return NULL; |
b3f66fd3 NTND |
511 | } |
512 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
513 | if (is_absolute_path(git_work_tree_cfg)) | |
514 | set_git_work_tree(git_work_tree_cfg); | |
515 | else { | |
516 | char core_worktree[PATH_MAX]; | |
517 | if (chdir(gitdirenv)) | |
518 | die_errno("Could not chdir to '%s'", gitdirenv); | |
519 | if (chdir(git_work_tree_cfg)) | |
520 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
521 | if (!getcwd(core_worktree, PATH_MAX)) | |
522 | die_errno("Could not get directory '%s'", git_work_tree_cfg); | |
523 | if (chdir(cwd)) | |
524 | die_errno("Could not come back to cwd"); | |
525 | set_git_work_tree(core_worktree); | |
526 | } | |
527 | } | |
2cd83d10 JK |
528 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
529 | /* #16d */ | |
530 | set_git_dir(gitdirenv); | |
531 | free(gitfile); | |
532 | return NULL; | |
533 | } | |
b3f66fd3 NTND |
534 | else /* #2, #10 */ |
535 | set_git_work_tree("."); | |
536 | ||
537 | /* set_git_work_tree() must have been called by now */ | |
538 | worktree = get_git_work_tree(); | |
539 | ||
540 | /* both get_git_work_tree() and cwd are already normalized */ | |
541 | if (!strcmp(cwd, worktree)) { /* cwd == worktree */ | |
542 | set_git_dir(gitdirenv); | |
543 | free(gitfile); | |
e4e30347 | 544 | return NULL; |
b3f66fd3 | 545 | } |
e4e30347 | 546 | |
9b125da4 NTND |
547 | offset = dir_inside_of(cwd, worktree); |
548 | if (offset >= 0) { /* cwd inside worktree? */ | |
e2a57aac | 549 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
550 | if (chdir(worktree)) |
551 | die_errno("Could not chdir to '%s'", worktree); | |
552 | cwd[len++] = '/'; | |
553 | cwd[len] = '\0'; | |
554 | free(gitfile); | |
9b125da4 | 555 | return cwd + offset; |
93a00542 | 556 | } |
b3f66fd3 NTND |
557 | |
558 | /* cwd outside worktree */ | |
559 | set_git_dir(gitdirenv); | |
560 | free(gitfile); | |
561 | return NULL; | |
93a00542 JN |
562 | } |
563 | ||
9951d3b3 NTND |
564 | static const char *setup_discovered_git_dir(const char *gitdir, |
565 | char *cwd, int offset, int len, | |
566 | int *nongit_ok) | |
98937bef | 567 | { |
9951d3b3 NTND |
568 | if (check_repository_format_gently(gitdir, nongit_ok)) |
569 | return NULL; | |
98937bef | 570 | |
4868b2ea JN |
571 | /* --work-tree is set without --git-dir; use discovered one */ |
572 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
573 | if (offset != len && !is_absolute_path(gitdir)) | |
e2a57aac | 574 | gitdir = xstrdup(real_path(gitdir)); |
4868b2ea JN |
575 | if (chdir(cwd)) |
576 | die_errno("Could not come back to cwd"); | |
577 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
578 | } | |
579 | ||
9951d3b3 NTND |
580 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
581 | if (is_bare_repository_cfg > 0) { | |
e2a57aac | 582 | set_git_dir(offset == len ? gitdir : real_path(gitdir)); |
9951d3b3 NTND |
583 | if (chdir(cwd)) |
584 | die_errno("Could not come back to cwd"); | |
98937bef | 585 | return NULL; |
9951d3b3 | 586 | } |
98937bef | 587 | |
9951d3b3 NTND |
588 | /* #0, #1, #5, #8, #9, #12, #13 */ |
589 | set_git_work_tree("."); | |
590 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
591 | set_git_dir(gitdir); | |
98937bef | 592 | inside_git_dir = 0; |
9951d3b3 | 593 | inside_work_tree = 1; |
98937bef NTND |
594 | if (offset == len) |
595 | return NULL; | |
596 | ||
597 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
598 | offset++; | |
599 | cwd[len++] = '/'; | |
600 | cwd[len] = 0; | |
601 | return cwd + offset; | |
602 | } | |
603 | ||
1cd8031b NTND |
604 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
605 | static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok) | |
68698da5 JN |
606 | { |
607 | int root_len; | |
608 | ||
1cd8031b NTND |
609 | if (check_repository_format_gently(".", nongit_ok)) |
610 | return NULL; | |
611 | ||
2cd83d10 JK |
612 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
613 | ||
4868b2ea JN |
614 | /* --work-tree is set without --git-dir; use discovered one */ |
615 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
616 | const char *gitdir; | |
617 | ||
618 | gitdir = offset == len ? "." : xmemdupz(cwd, offset); | |
619 | if (chdir(cwd)) | |
620 | die_errno("Could not come back to cwd"); | |
621 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
622 | } | |
623 | ||
68698da5 | 624 | inside_git_dir = 1; |
1cd8031b | 625 | inside_work_tree = 0; |
68698da5 | 626 | if (offset != len) { |
8fc0ae80 NTND |
627 | if (chdir(cwd)) |
628 | die_errno("Cannot come back to cwd"); | |
68698da5 JN |
629 | root_len = offset_1st_component(cwd); |
630 | cwd[offset > root_len ? offset : root_len] = '\0'; | |
631 | set_git_dir(cwd); | |
337e51ce | 632 | } |
1cd8031b | 633 | else |
68698da5 | 634 | set_git_dir("."); |
68698da5 JN |
635 | return NULL; |
636 | } | |
637 | ||
f161edeb JN |
638 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
639 | { | |
640 | if (!nongit_ok) | |
641 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
642 | if (chdir(cwd)) | |
643 | die_errno("Cannot come back to cwd"); | |
644 | *nongit_ok = 1; | |
645 | return NULL; | |
646 | } | |
647 | ||
2565b43b | 648 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
649 | { |
650 | struct stat buf; | |
2565b43b CB |
651 | if (stat(path, &buf)) { |
652 | die_errno("failed to stat '%*s%s%s'", | |
653 | prefix_len, | |
60c98d1e JN |
654 | prefix ? prefix : "", |
655 | prefix ? "/" : "", path); | |
2565b43b | 656 | } |
60c98d1e JN |
657 | return buf.st_dev; |
658 | } | |
659 | ||
9e2326c7 | 660 | /* |
1b77d83c MH |
661 | * A "string_list_each_func_t" function that canonicalizes an entry |
662 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
663 | * discards it if unusable. The presence of an empty entry in |
664 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
665 | * subsequent entries. | |
9e2326c7 | 666 | */ |
1b77d83c | 667 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 668 | void *cb_data) |
9e2326c7 | 669 | { |
7ec30aaa | 670 | int *empty_entry_found = cb_data; |
1b77d83c | 671 | char *ceil = item->string; |
9e2326c7 | 672 | |
7ec30aaa MH |
673 | if (!*ceil) { |
674 | *empty_entry_found = 1; | |
9e2326c7 | 675 | return 0; |
7ec30aaa | 676 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 677 | return 0; |
7ec30aaa MH |
678 | } else if (*empty_entry_found) { |
679 | /* Keep entry but do not canonicalize it */ | |
680 | return 1; | |
681 | } else { | |
682 | const char *real_path = real_path_if_valid(ceil); | |
683 | if (!real_path) | |
684 | return 0; | |
685 | free(item->string); | |
686 | item->string = xstrdup(real_path); | |
687 | return 1; | |
688 | } | |
9e2326c7 MH |
689 | } |
690 | ||
e90fdc39 JS |
691 | /* |
692 | * We cannot decide in this function whether we are in the work tree or | |
693 | * not, since the config can only be read _after_ this function was called. | |
694 | */ | |
a60645f9 | 695 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 696 | { |
0454dd93 | 697 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 698 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
d288a700 | 699 | static char cwd[PATH_MAX+1]; |
9951d3b3 NTND |
700 | const char *gitdirenv, *ret; |
701 | char *gitfile; | |
31171d9e | 702 | int len, offset, offset_parent, ceil_offset = -1; |
c7d1d1b1 RH |
703 | dev_t current_device = 0; |
704 | int one_filesystem = 1; | |
d288a700 | 705 | |
af05d679 SG |
706 | /* |
707 | * Let's assume that we are in a git repository. | |
708 | * If it turns out later that we are somewhere else, the value will be | |
709 | * updated accordingly. | |
710 | */ | |
711 | if (nongit_ok) | |
712 | *nongit_ok = 0; | |
713 | ||
b3f66fd3 NTND |
714 | if (!getcwd(cwd, sizeof(cwd)-1)) |
715 | die_errno("Unable to read current working directory"); | |
716 | offset = len = strlen(cwd); | |
717 | ||
e90fdc39 JS |
718 | /* |
719 | * If GIT_DIR is set explicitly, we're not going | |
720 | * to do any discovery, but we still do repository | |
721 | * validation. | |
722 | */ | |
ad1a382f | 723 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 724 | if (gitdirenv) |
b3f66fd3 | 725 | return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok); |
d288a700 | 726 | |
31171d9e | 727 | if (env_ceiling_dirs) { |
7ec30aaa MH |
728 | int empty_entry_found = 0; |
729 | ||
31171d9e | 730 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 731 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 732 | canonicalize_ceiling_entry, &empty_entry_found); |
31171d9e MH |
733 | ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs); |
734 | string_list_clear(&ceiling_dirs, 0); | |
735 | } | |
736 | ||
17d778e7 JH |
737 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
738 | ceil_offset = 1; | |
d288a700 | 739 | |
892c41b9 | 740 | /* |
e90fdc39 | 741 | * Test in the following order (relative to the cwd): |
b44ebb19 | 742 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
743 | * - .git/ |
744 | * - ./ (bare) | |
b44ebb19 | 745 | * - ../.git |
e90fdc39 JS |
746 | * - ../.git/ |
747 | * - ../ (bare) | |
748 | * - ../../.git/ | |
749 | * etc. | |
892c41b9 | 750 | */ |
cf87463e | 751 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 752 | if (one_filesystem) |
2565b43b | 753 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 754 | for (;;) { |
13d6ec91 | 755 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
756 | if (gitfile) |
757 | gitdirenv = gitfile = xstrdup(gitfile); | |
758 | else { | |
759 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
760 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
761 | } | |
762 | ||
763 | if (gitdirenv) { | |
764 | ret = setup_discovered_git_dir(gitdirenv, | |
765 | cwd, offset, len, | |
766 | nongit_ok); | |
767 | free(gitfile); | |
768 | return ret; | |
769 | } | |
770 | free(gitfile); | |
771 | ||
68698da5 | 772 | if (is_git_directory(".")) |
1cd8031b NTND |
773 | return setup_bare_git_dir(cwd, offset, len, nongit_ok); |
774 | ||
2565b43b CB |
775 | offset_parent = offset; |
776 | while (--offset_parent > ceil_offset && cwd[offset_parent] != '/'); | |
777 | if (offset_parent <= ceil_offset) | |
f161edeb | 778 | return setup_nongit(cwd, nongit_ok); |
8030e442 | 779 | if (one_filesystem) { |
2565b43b | 780 | dev_t parent_device = get_device_or_die("..", cwd, offset); |
60c98d1e | 781 | if (parent_device != current_device) { |
8030e442 LD |
782 | if (nongit_ok) { |
783 | if (chdir(cwd)) | |
784 | die_errno("Cannot come back to cwd"); | |
785 | *nongit_ok = 1; | |
786 | return NULL; | |
787 | } | |
788 | cwd[offset] = '\0'; | |
2565b43b | 789 | die("Not a git repository (or any parent up to mount point %s)\n" |
cf87463e | 790 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); |
8030e442 LD |
791 | } |
792 | } | |
502ffe34 LD |
793 | if (chdir("..")) { |
794 | cwd[offset] = '\0'; | |
d824cbba | 795 | die_errno("Cannot change to '%s/..'", cwd); |
502ffe34 | 796 | } |
2565b43b | 797 | offset = offset_parent; |
892c41b9 | 798 | } |
d288a700 | 799 | } |
5e7bfe25 | 800 | |
a60645f9 NTND |
801 | const char *setup_git_directory_gently(int *nongit_ok) |
802 | { | |
803 | const char *prefix; | |
804 | ||
805 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f | 806 | if (prefix) |
a6f7f9a3 | 807 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 808 | else |
a6f7f9a3 | 809 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 810 | |
f07d6a1a | 811 | if (startup_info) { |
a60645f9 | 812 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
813 | startup_info->prefix = prefix; |
814 | } | |
a60645f9 NTND |
815 | return prefix; |
816 | } | |
817 | ||
94df2506 JH |
818 | int git_config_perm(const char *var, const char *value) |
819 | { | |
06cbe855 HO |
820 | int i; |
821 | char *endptr; | |
822 | ||
823 | if (value == NULL) | |
824 | return PERM_GROUP; | |
825 | ||
826 | if (!strcmp(value, "umask")) | |
827 | return PERM_UMASK; | |
828 | if (!strcmp(value, "group")) | |
829 | return PERM_GROUP; | |
830 | if (!strcmp(value, "all") || | |
831 | !strcmp(value, "world") || | |
832 | !strcmp(value, "everybody")) | |
833 | return PERM_EVERYBODY; | |
834 | ||
835 | /* Parse octal numbers */ | |
836 | i = strtol(value, &endptr, 8); | |
837 | ||
838 | /* If not an octal number, maybe true/false? */ | |
839 | if (*endptr != 0) | |
840 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
841 | ||
842 | /* | |
843 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 844 | * a chmod value to restrict to. |
06cbe855 HO |
845 | */ |
846 | switch (i) { | |
847 | case PERM_UMASK: /* 0 */ | |
848 | return PERM_UMASK; | |
849 | case OLD_PERM_GROUP: /* 1 */ | |
850 | return PERM_GROUP; | |
851 | case OLD_PERM_EVERYBODY: /* 2 */ | |
852 | return PERM_EVERYBODY; | |
94df2506 | 853 | } |
06cbe855 HO |
854 | |
855 | /* A filemode value was given: 0xxx */ | |
856 | ||
857 | if ((i & 0600) != 0600) | |
858 | die("Problem with core.sharedRepository filemode value " | |
859 | "(0%.3o).\nThe owner of files must always have " | |
860 | "read and write permissions.", i); | |
861 | ||
862 | /* | |
863 | * Mask filemode value. Others can not get write permission. | |
864 | * x flags for directories are handled separately. | |
865 | */ | |
5a688fe4 | 866 | return -(i & 0666); |
94df2506 JH |
867 | } |
868 | ||
ef90d6d4 | 869 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 870 | { |
299726d5 JS |
871 | if (strcmp(var, "core.repositoryformatversion") == 0) |
872 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 873 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 874 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
875 | else if (strcmp(var, "core.bare") == 0) { |
876 | is_bare_repository_cfg = git_config_bool(var, value); | |
877 | if (is_bare_repository_cfg == 1) | |
878 | inside_work_tree = -1; | |
879 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
880 | if (!value) |
881 | return config_error_nonbool(var); | |
8e0f7003 | 882 | free(git_work_tree_cfg); |
e90fdc39 JS |
883 | git_work_tree_cfg = xstrdup(value); |
884 | inside_work_tree = -1; | |
885 | } | |
299726d5 | 886 | return 0; |
ab9cb76f JH |
887 | } |
888 | ||
889 | int check_repository_format(void) | |
890 | { | |
337e51ce | 891 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
892 | } |
893 | ||
e1e5ec86 CB |
894 | /* |
895 | * Returns the "prefix", a path to the current working directory | |
896 | * relative to the work tree root, or NULL, if the current working | |
897 | * directory is not a strict subdirectory of the work tree root. The | |
898 | * prefix always ends with a '/' character. | |
899 | */ | |
5e7bfe25 JH |
900 | const char *setup_git_directory(void) |
901 | { | |
b3f66fd3 | 902 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 903 | } |
abc06822 FG |
904 | |
905 | const char *resolve_gitdir(const char *suspect) | |
906 | { | |
907 | if (is_git_directory(suspect)) | |
908 | return suspect; | |
efc5fb6a | 909 | return read_gitfile(suspect); |
abc06822 | 910 | } |