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Commit | Line | Data |
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d288a700 | 1 | #include "cache.h" |
e90fdc39 JS |
2 | #include "dir.h" |
3 | ||
4 | static int inside_git_dir = -1; | |
5 | static int inside_work_tree = -1; | |
d288a700 | 6 | |
546e0fd9 | 7 | static char *prefix_path_gently(const char *prefix, int len, const char *path) |
d089ebaa JH |
8 | { |
9 | const char *orig = path; | |
18e051a3 CMAB |
10 | char *sanitized; |
11 | if (is_absolute_path(orig)) { | |
e2a57aac | 12 | const char *temp = real_path(path); |
18e051a3 CMAB |
13 | sanitized = xmalloc(len + strlen(temp) + 1); |
14 | strcpy(sanitized, temp); | |
15 | } else { | |
16 | sanitized = xmalloc(len + strlen(path) + 1); | |
d089ebaa JH |
17 | if (len) |
18 | memcpy(sanitized, prefix, len); | |
19 | strcpy(sanitized + len, path); | |
f332726e | 20 | } |
f3cad0ad | 21 | if (normalize_path_copy(sanitized, sanitized)) |
d089ebaa | 22 | goto error_out; |
9a13ba1b | 23 | if (is_absolute_path(orig)) { |
72ec8ba6 | 24 | size_t root_len, len, total; |
d089ebaa | 25 | const char *work_tree = get_git_work_tree(); |
b3100fd5 JH |
26 | if (!work_tree) |
27 | goto error_out; | |
28 | len = strlen(work_tree); | |
72ec8ba6 | 29 | root_len = offset_1st_component(work_tree); |
b3100fd5 | 30 | total = strlen(sanitized) + 1; |
d089ebaa | 31 | if (strncmp(sanitized, work_tree, len) || |
72ec8ba6 | 32 | (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) { |
d089ebaa | 33 | error_out: |
546e0fd9 JK |
34 | free(sanitized); |
35 | return NULL; | |
d089ebaa JH |
36 | } |
37 | if (sanitized[len] == '/') | |
38 | len++; | |
39 | memmove(sanitized, sanitized + len, total - len); | |
40 | } | |
41 | return sanitized; | |
f332726e LT |
42 | } |
43 | ||
546e0fd9 JK |
44 | char *prefix_path(const char *prefix, int len, const char *path) |
45 | { | |
46 | char *r = prefix_path_gently(prefix, len, path); | |
47 | if (!r) | |
48 | die("'%s' is outside repository", path); | |
49 | return r; | |
50 | } | |
51 | ||
52 | int path_inside_repo(const char *prefix, const char *path) | |
53 | { | |
54 | int len = prefix ? strlen(prefix) : 0; | |
55 | char *r = prefix_path_gently(prefix, len, path); | |
56 | if (r) { | |
57 | free(r); | |
58 | return 1; | |
59 | } | |
60 | return 0; | |
61 | } | |
62 | ||
c6e8c800 JH |
63 | int check_filename(const char *prefix, const char *arg) |
64 | { | |
65 | const char *name; | |
66 | struct stat st; | |
67 | ||
68 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
69 | if (!lstat(name, &st)) | |
70 | return 1; /* file exists */ | |
71 | if (errno == ENOENT || errno == ENOTDIR) | |
72 | return 0; /* file does not exist */ | |
73 | die_errno("failed to stat '%s'", arg); | |
74 | } | |
75 | ||
023e37c3 MM |
76 | static void NORETURN die_verify_filename(const char *prefix, |
77 | const char *arg, | |
78 | int diagnose_misspelt_rev) | |
009fee47 MM |
79 | { |
80 | unsigned char sha1[20]; | |
81 | unsigned mode; | |
0e539dca | 82 | |
023e37c3 MM |
83 | if (!diagnose_misspelt_rev) |
84 | die("%s: no such path in the working tree.\n" | |
85 | "Use '-- <path>...' to specify paths that do not exist locally.", | |
86 | arg); | |
0e539dca JH |
87 | /* |
88 | * Saying "'(icase)foo' does not exist in the index" when the | |
89 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
90 | * begins with a colon and is followed by a non-alnum; do not | |
91 | * let get_sha1_with_mode_1(only_to_die=1) to even trigger. | |
92 | */ | |
93 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
94 | /* try a detailed diagnostic ... */ | |
95 | get_sha1_with_mode_1(arg, sha1, &mode, 1, prefix); | |
96 | ||
009fee47 MM |
97 | /* ... or fall back the most general message. */ |
98 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
99 | "Use '--' to separate paths from revisions", arg); | |
100 | ||
101 | } | |
102 | ||
e23d0b4a LT |
103 | /* |
104 | * Verify a filename that we got as an argument for a pathspec | |
105 | * entry. Note that a filename that begins with "-" never verifies | |
106 | * as true, because even if such a filename were to exist, we want | |
107 | * it to be preceded by the "--" marker (or we want the user to | |
108 | * use a format like "./-filename") | |
023e37c3 MM |
109 | * |
110 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
111 | * diagnosis when dying upon finding that "name" is not a pathname. | |
112 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
113 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
114 | * will only complain about an inexisting file. | |
115 | * | |
116 | * This function is typically called to check that a "file or rev" | |
117 | * argument is unambiguous. In this case, the caller will want | |
118 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
119 | * argument (which could have been a revision), and | |
120 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
121 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 122 | */ |
023e37c3 MM |
123 | void verify_filename(const char *prefix, |
124 | const char *arg, | |
125 | int diagnose_misspelt_rev) | |
e23d0b4a | 126 | { |
e23d0b4a LT |
127 | if (*arg == '-') |
128 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 129 | if (check_filename(prefix, arg)) |
e23d0b4a | 130 | return; |
023e37c3 | 131 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
132 | } |
133 | ||
ea92f41f JH |
134 | /* |
135 | * Opposite of the above: the command line did not have -- marker | |
136 | * and we parsed the arg as a refname. It should not be interpretable | |
137 | * as a filename. | |
138 | */ | |
139 | void verify_non_filename(const char *prefix, const char *arg) | |
140 | { | |
7ae3df8c | 141 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 142 | return; |
ea92f41f JH |
143 | if (*arg == '-') |
144 | return; /* flag */ | |
c6e8c800 JH |
145 | if (!check_filename(prefix, arg)) |
146 | return; | |
147 | die("ambiguous argument '%s': both revision and filename\n" | |
148 | "Use '--' to separate filenames from revisions", arg); | |
ea92f41f JH |
149 | } |
150 | ||
8a42c985 JH |
151 | /* |
152 | * Magic pathspec | |
153 | * | |
154 | * NEEDSWORK: These need to be moved to dir.h or even to a new | |
155 | * pathspec.h when we restructure get_pathspec() users to use the | |
156 | * "struct pathspec" interface. | |
157 | * | |
158 | * Possible future magic semantics include stuff like: | |
159 | * | |
160 | * { PATHSPEC_NOGLOB, '!', "noglob" }, | |
6d942927 | 161 | * { PATHSPEC_ICASE, '\0', "icase" }, |
8a42c985 JH |
162 | * { PATHSPEC_RECURSIVE, '*', "recursive" }, |
163 | * { PATHSPEC_REGEXP, '\0', "regexp" }, | |
164 | * | |
165 | */ | |
166 | #define PATHSPEC_FROMTOP (1<<0) | |
167 | ||
488201c8 | 168 | static struct pathspec_magic { |
8a42c985 JH |
169 | unsigned bit; |
170 | char mnemonic; /* this cannot be ':'! */ | |
171 | const char *name; | |
172 | } pathspec_magic[] = { | |
173 | { PATHSPEC_FROMTOP, '/', "top" }, | |
174 | }; | |
175 | ||
176 | /* | |
177 | * Take an element of a pathspec and check for magic signatures. | |
178 | * Append the result to the prefix. | |
179 | * | |
180 | * For now, we only parse the syntax and throw out anything other than | |
181 | * "top" magic. | |
182 | * | |
183 | * NEEDSWORK: This needs to be rewritten when we start migrating | |
184 | * get_pathspec() users to use the "struct pathspec" interface. For | |
185 | * example, a pathspec element may be marked as case-insensitive, but | |
186 | * the prefix part must always match literally, and a single stupid | |
187 | * string cannot express such a case. | |
188 | */ | |
488201c8 | 189 | static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt) |
8a42c985 JH |
190 | { |
191 | unsigned magic = 0; | |
192 | const char *copyfrom = elt; | |
6d942927 | 193 | int i; |
8a42c985 JH |
194 | |
195 | if (elt[0] != ':') { | |
196 | ; /* nothing to do */ | |
197 | } else if (elt[1] == '(') { | |
198 | /* longhand */ | |
199 | const char *nextat; | |
200 | for (copyfrom = elt + 2; | |
201 | *copyfrom && *copyfrom != ')'; | |
202 | copyfrom = nextat) { | |
203 | size_t len = strcspn(copyfrom, ",)"); | |
204 | if (copyfrom[len] == ')') | |
205 | nextat = copyfrom + len; | |
206 | else | |
207 | nextat = copyfrom + len + 1; | |
208 | if (!len) | |
209 | continue; | |
210 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) | |
211 | if (strlen(pathspec_magic[i].name) == len && | |
212 | !strncmp(pathspec_magic[i].name, copyfrom, len)) { | |
213 | magic |= pathspec_magic[i].bit; | |
214 | break; | |
215 | } | |
216 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
217 | die("Invalid pathspec magic '%.*s' in '%s'", | |
218 | (int) len, copyfrom, elt); | |
219 | } | |
220 | if (*copyfrom == ')') | |
221 | copyfrom++; | |
222 | } else { | |
223 | /* shorthand */ | |
224 | for (copyfrom = elt + 1; | |
225 | *copyfrom && *copyfrom != ':'; | |
226 | copyfrom++) { | |
227 | char ch = *copyfrom; | |
2f6c9760 JH |
228 | |
229 | if (!is_pathspec_magic(ch)) | |
230 | break; | |
8a42c985 JH |
231 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) |
232 | if (pathspec_magic[i].mnemonic == ch) { | |
233 | magic |= pathspec_magic[i].bit; | |
234 | break; | |
235 | } | |
236 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
2f6c9760 JH |
237 | die("Unimplemented pathspec magic '%c' in '%s'", |
238 | ch, elt); | |
8a42c985 JH |
239 | } |
240 | if (*copyfrom == ':') | |
241 | copyfrom++; | |
242 | } | |
243 | ||
244 | if (magic & PATHSPEC_FROMTOP) | |
6d942927 | 245 | return xstrdup(copyfrom); |
8a42c985 | 246 | else |
6d942927 | 247 | return prefix_path(prefix, prefixlen, copyfrom); |
8a42c985 JH |
248 | } |
249 | ||
6b5ee137 | 250 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 251 | { |
6b5ee137 | 252 | const char *entry = *pathspec; |
d089ebaa | 253 | const char **src, **dst; |
d288a700 LT |
254 | int prefixlen; |
255 | ||
f332726e LT |
256 | if (!prefix && !entry) |
257 | return NULL; | |
d288a700 LT |
258 | |
259 | if (!entry) { | |
260 | static const char *spec[2]; | |
261 | spec[0] = prefix; | |
262 | spec[1] = NULL; | |
263 | return spec; | |
264 | } | |
265 | ||
266 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
267 | src = pathspec; |
268 | dst = pathspec; | |
f332726e | 269 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa | 270 | while (*src) { |
8a42c985 | 271 | *(dst++) = prefix_pathspec(prefix, prefixlen, *src); |
d089ebaa JH |
272 | src++; |
273 | } | |
274 | *dst = NULL; | |
275 | if (!*pathspec) | |
276 | return NULL; | |
277 | return pathspec; | |
d288a700 LT |
278 | } |
279 | ||
5f5608bc | 280 | /* |
ad1a382f | 281 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 282 | * We want to see: |
5f5608bc | 283 | * |
790296fd | 284 | * - either an objects/ directory _or_ the proper |
5f5608bc | 285 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 286 | * - a refs/ directory |
8098a178 | 287 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
288 | * a proper "ref:", or a regular file HEAD that has a properly |
289 | * formatted sha1 object name. | |
5f5608bc | 290 | */ |
b3256eb8 | 291 | int is_git_directory(const char *suspect) |
5f5608bc | 292 | { |
ad1a382f SP |
293 | char path[PATH_MAX]; |
294 | size_t len = strlen(suspect); | |
295 | ||
3c9d0414 GB |
296 | if (PATH_MAX <= len + strlen("/objects")) |
297 | die("Too long path: %.*s", 60, suspect); | |
ad1a382f SP |
298 | strcpy(path, suspect); |
299 | if (getenv(DB_ENVIRONMENT)) { | |
300 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
301 | return 0; | |
302 | } | |
303 | else { | |
304 | strcpy(path + len, "/objects"); | |
305 | if (access(path, X_OK)) | |
306 | return 0; | |
307 | } | |
308 | ||
309 | strcpy(path + len, "/refs"); | |
310 | if (access(path, X_OK)) | |
8098a178 | 311 | return 0; |
ad1a382f SP |
312 | |
313 | strcpy(path + len, "/HEAD"); | |
c847f537 | 314 | if (validate_headref(path)) |
ad1a382f SP |
315 | return 0; |
316 | ||
8098a178 | 317 | return 1; |
5f5608bc LT |
318 | } |
319 | ||
68025633 JS |
320 | int is_inside_git_dir(void) |
321 | { | |
e90fdc39 JS |
322 | if (inside_git_dir < 0) |
323 | inside_git_dir = is_inside_dir(get_git_dir()); | |
324 | return inside_git_dir; | |
892c41b9 ML |
325 | } |
326 | ||
892c41b9 ML |
327 | int is_inside_work_tree(void) |
328 | { | |
e90fdc39 JS |
329 | if (inside_work_tree < 0) |
330 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
331 | return inside_work_tree; | |
892c41b9 ML |
332 | } |
333 | ||
f3fa1838 JH |
334 | void setup_work_tree(void) |
335 | { | |
354e6534 JS |
336 | const char *work_tree, *git_dir; |
337 | static int initialized = 0; | |
338 | ||
339 | if (initialized) | |
340 | return; | |
341 | work_tree = get_git_work_tree(); | |
342 | git_dir = get_git_dir(); | |
59f0f2f3 | 343 | if (!is_absolute_path(git_dir)) |
e2a57aac | 344 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
345 | if (!work_tree || chdir(work_tree)) |
346 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
347 | |
348 | /* | |
349 | * Make sure subsequent git processes find correct worktree | |
350 | * if $GIT_WORK_TREE is set relative | |
351 | */ | |
352 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
353 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
354 | ||
e2a57aac | 355 | set_git_dir(relative_path(git_dir, work_tree)); |
354e6534 | 356 | initialized = 1; |
59f0f2f3 MH |
357 | } |
358 | ||
337e51ce | 359 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 360 | { |
337e51ce NTND |
361 | char repo_config[PATH_MAX+1]; |
362 | ||
363 | /* | |
364 | * git_config() can't be used here because it calls git_pathdup() | |
365 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
366 | * set git_dir to ".git". | |
367 | * | |
368 | * We are in gitdir setup, no git dir has been found useable yet. | |
369 | * Use a gentler version of git_config() to check if this repo | |
370 | * is a good one. | |
371 | */ | |
372 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
373 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
374 | if (GIT_REPO_VERSION < repository_format_version) { |
375 | if (!nongit_ok) | |
376 | die ("Expected git repo version <= %d, found %d", | |
377 | GIT_REPO_VERSION, repository_format_version); | |
378 | warning("Expected git repo version <= %d, found %d", | |
379 | GIT_REPO_VERSION, repository_format_version); | |
380 | warning("Please upgrade Git"); | |
381 | *nongit_ok = -1; | |
382 | return -1; | |
383 | } | |
384 | return 0; | |
385 | } | |
386 | ||
b44ebb19 LH |
387 | /* |
388 | * Try to read the location of the git directory from the .git file, | |
389 | * return path to git directory if found. | |
390 | */ | |
13d6ec91 | 391 | const char *read_gitfile(const char *path) |
b44ebb19 LH |
392 | { |
393 | char *buf; | |
40c813e0 BK |
394 | char *dir; |
395 | const char *slash; | |
b44ebb19 LH |
396 | struct stat st; |
397 | int fd; | |
b1905aea | 398 | ssize_t len; |
b44ebb19 LH |
399 | |
400 | if (stat(path, &st)) | |
401 | return NULL; | |
402 | if (!S_ISREG(st.st_mode)) | |
403 | return NULL; | |
404 | fd = open(path, O_RDONLY); | |
405 | if (fd < 0) | |
d824cbba | 406 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
407 | buf = xmalloc(st.st_size + 1); |
408 | len = read_in_full(fd, buf, st.st_size); | |
409 | close(fd); | |
410 | if (len != st.st_size) | |
411 | die("Error reading %s", path); | |
412 | buf[len] = '\0'; | |
413 | if (prefixcmp(buf, "gitdir: ")) | |
414 | die("Invalid gitfile format: %s", path); | |
415 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
416 | len--; | |
417 | if (len < 9) | |
418 | die("No path in gitfile: %s", path); | |
419 | buf[len] = '\0'; | |
40c813e0 BK |
420 | dir = buf + 8; |
421 | ||
422 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
423 | size_t pathlen = slash+1 - path; | |
424 | size_t dirlen = pathlen + len - 8; | |
425 | dir = xmalloc(dirlen + 1); | |
426 | strncpy(dir, path, pathlen); | |
427 | strncpy(dir + pathlen, buf + 8, len - 8); | |
428 | dir[dirlen] = '\0'; | |
429 | free(buf); | |
430 | buf = dir; | |
431 | } | |
432 | ||
433 | if (!is_git_directory(dir)) | |
434 | die("Not a git repository: %s", dir); | |
e2a57aac | 435 | path = real_path(dir); |
40c813e0 | 436 | |
b44ebb19 LH |
437 | free(buf); |
438 | return path; | |
439 | } | |
440 | ||
e4e30347 | 441 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
b3f66fd3 NTND |
442 | char *cwd, int len, |
443 | int *nongit_ok) | |
e4e30347 | 444 | { |
b3f66fd3 NTND |
445 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
446 | const char *worktree; | |
447 | char *gitfile; | |
9b125da4 | 448 | int offset; |
e4e30347 JN |
449 | |
450 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
451 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 452 | |
13d6ec91 | 453 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
454 | if (gitfile) { |
455 | gitfile = xstrdup(gitfile); | |
456 | gitdirenv = gitfile; | |
457 | } | |
458 | ||
e4e30347 JN |
459 | if (!is_git_directory(gitdirenv)) { |
460 | if (nongit_ok) { | |
461 | *nongit_ok = 1; | |
b3f66fd3 | 462 | free(gitfile); |
e4e30347 JN |
463 | return NULL; |
464 | } | |
465 | die("Not a git repository: '%s'", gitdirenv); | |
466 | } | |
b3f66fd3 NTND |
467 | |
468 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
469 | free(gitfile); | |
470 | return NULL; | |
e4e30347 | 471 | } |
b3f66fd3 NTND |
472 | |
473 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
474 | if (work_tree_env) | |
475 | set_git_work_tree(work_tree_env); | |
476 | else if (is_bare_repository_cfg > 0) { | |
477 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
478 | die("core.bare and core.worktree do not make sense"); | |
479 | ||
480 | /* #18, #26 */ | |
481 | set_git_dir(gitdirenv); | |
482 | free(gitfile); | |
e4e30347 | 483 | return NULL; |
b3f66fd3 NTND |
484 | } |
485 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
486 | if (is_absolute_path(git_work_tree_cfg)) | |
487 | set_git_work_tree(git_work_tree_cfg); | |
488 | else { | |
489 | char core_worktree[PATH_MAX]; | |
490 | if (chdir(gitdirenv)) | |
491 | die_errno("Could not chdir to '%s'", gitdirenv); | |
492 | if (chdir(git_work_tree_cfg)) | |
493 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
494 | if (!getcwd(core_worktree, PATH_MAX)) | |
495 | die_errno("Could not get directory '%s'", git_work_tree_cfg); | |
496 | if (chdir(cwd)) | |
497 | die_errno("Could not come back to cwd"); | |
498 | set_git_work_tree(core_worktree); | |
499 | } | |
500 | } | |
501 | else /* #2, #10 */ | |
502 | set_git_work_tree("."); | |
503 | ||
504 | /* set_git_work_tree() must have been called by now */ | |
505 | worktree = get_git_work_tree(); | |
506 | ||
507 | /* both get_git_work_tree() and cwd are already normalized */ | |
508 | if (!strcmp(cwd, worktree)) { /* cwd == worktree */ | |
509 | set_git_dir(gitdirenv); | |
510 | free(gitfile); | |
e4e30347 | 511 | return NULL; |
b3f66fd3 | 512 | } |
e4e30347 | 513 | |
9b125da4 NTND |
514 | offset = dir_inside_of(cwd, worktree); |
515 | if (offset >= 0) { /* cwd inside worktree? */ | |
e2a57aac | 516 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
517 | if (chdir(worktree)) |
518 | die_errno("Could not chdir to '%s'", worktree); | |
519 | cwd[len++] = '/'; | |
520 | cwd[len] = '\0'; | |
521 | free(gitfile); | |
9b125da4 | 522 | return cwd + offset; |
93a00542 | 523 | } |
b3f66fd3 NTND |
524 | |
525 | /* cwd outside worktree */ | |
526 | set_git_dir(gitdirenv); | |
527 | free(gitfile); | |
528 | return NULL; | |
93a00542 JN |
529 | } |
530 | ||
9951d3b3 NTND |
531 | static const char *setup_discovered_git_dir(const char *gitdir, |
532 | char *cwd, int offset, int len, | |
533 | int *nongit_ok) | |
98937bef | 534 | { |
9951d3b3 NTND |
535 | if (check_repository_format_gently(gitdir, nongit_ok)) |
536 | return NULL; | |
98937bef | 537 | |
4868b2ea JN |
538 | /* --work-tree is set without --git-dir; use discovered one */ |
539 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
540 | if (offset != len && !is_absolute_path(gitdir)) | |
e2a57aac | 541 | gitdir = xstrdup(real_path(gitdir)); |
4868b2ea JN |
542 | if (chdir(cwd)) |
543 | die_errno("Could not come back to cwd"); | |
544 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
545 | } | |
546 | ||
9951d3b3 NTND |
547 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
548 | if (is_bare_repository_cfg > 0) { | |
e2a57aac | 549 | set_git_dir(offset == len ? gitdir : real_path(gitdir)); |
9951d3b3 NTND |
550 | if (chdir(cwd)) |
551 | die_errno("Could not come back to cwd"); | |
98937bef | 552 | return NULL; |
9951d3b3 | 553 | } |
98937bef | 554 | |
9951d3b3 NTND |
555 | /* #0, #1, #5, #8, #9, #12, #13 */ |
556 | set_git_work_tree("."); | |
557 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
558 | set_git_dir(gitdir); | |
98937bef | 559 | inside_git_dir = 0; |
9951d3b3 | 560 | inside_work_tree = 1; |
98937bef NTND |
561 | if (offset == len) |
562 | return NULL; | |
563 | ||
564 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
565 | offset++; | |
566 | cwd[len++] = '/'; | |
567 | cwd[len] = 0; | |
568 | return cwd + offset; | |
569 | } | |
570 | ||
1cd8031b NTND |
571 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
572 | static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok) | |
68698da5 JN |
573 | { |
574 | int root_len; | |
575 | ||
1cd8031b NTND |
576 | if (check_repository_format_gently(".", nongit_ok)) |
577 | return NULL; | |
578 | ||
4868b2ea JN |
579 | /* --work-tree is set without --git-dir; use discovered one */ |
580 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
581 | const char *gitdir; | |
582 | ||
583 | gitdir = offset == len ? "." : xmemdupz(cwd, offset); | |
584 | if (chdir(cwd)) | |
585 | die_errno("Could not come back to cwd"); | |
586 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
587 | } | |
588 | ||
68698da5 | 589 | inside_git_dir = 1; |
1cd8031b | 590 | inside_work_tree = 0; |
68698da5 | 591 | if (offset != len) { |
8fc0ae80 NTND |
592 | if (chdir(cwd)) |
593 | die_errno("Cannot come back to cwd"); | |
68698da5 JN |
594 | root_len = offset_1st_component(cwd); |
595 | cwd[offset > root_len ? offset : root_len] = '\0'; | |
596 | set_git_dir(cwd); | |
337e51ce | 597 | } |
1cd8031b | 598 | else |
68698da5 | 599 | set_git_dir("."); |
68698da5 JN |
600 | return NULL; |
601 | } | |
602 | ||
f161edeb JN |
603 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
604 | { | |
605 | if (!nongit_ok) | |
606 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
607 | if (chdir(cwd)) | |
608 | die_errno("Cannot come back to cwd"); | |
609 | *nongit_ok = 1; | |
610 | return NULL; | |
611 | } | |
612 | ||
2565b43b | 613 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
614 | { |
615 | struct stat buf; | |
2565b43b CB |
616 | if (stat(path, &buf)) { |
617 | die_errno("failed to stat '%*s%s%s'", | |
618 | prefix_len, | |
60c98d1e JN |
619 | prefix ? prefix : "", |
620 | prefix ? "/" : "", path); | |
2565b43b | 621 | } |
60c98d1e JN |
622 | return buf.st_dev; |
623 | } | |
624 | ||
e90fdc39 JS |
625 | /* |
626 | * We cannot decide in this function whether we are in the work tree or | |
627 | * not, since the config can only be read _after_ this function was called. | |
628 | */ | |
a60645f9 | 629 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 630 | { |
0454dd93 | 631 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
d288a700 | 632 | static char cwd[PATH_MAX+1]; |
9951d3b3 NTND |
633 | const char *gitdirenv, *ret; |
634 | char *gitfile; | |
2565b43b | 635 | int len, offset, offset_parent, ceil_offset; |
c7d1d1b1 RH |
636 | dev_t current_device = 0; |
637 | int one_filesystem = 1; | |
d288a700 | 638 | |
af05d679 SG |
639 | /* |
640 | * Let's assume that we are in a git repository. | |
641 | * If it turns out later that we are somewhere else, the value will be | |
642 | * updated accordingly. | |
643 | */ | |
644 | if (nongit_ok) | |
645 | *nongit_ok = 0; | |
646 | ||
b3f66fd3 NTND |
647 | if (!getcwd(cwd, sizeof(cwd)-1)) |
648 | die_errno("Unable to read current working directory"); | |
649 | offset = len = strlen(cwd); | |
650 | ||
e90fdc39 JS |
651 | /* |
652 | * If GIT_DIR is set explicitly, we're not going | |
653 | * to do any discovery, but we still do repository | |
654 | * validation. | |
655 | */ | |
ad1a382f | 656 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 657 | if (gitdirenv) |
b3f66fd3 | 658 | return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok); |
d288a700 | 659 | |
0454dd93 | 660 | ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs); |
17d778e7 JH |
661 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
662 | ceil_offset = 1; | |
d288a700 | 663 | |
892c41b9 | 664 | /* |
e90fdc39 | 665 | * Test in the following order (relative to the cwd): |
b44ebb19 | 666 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
667 | * - .git/ |
668 | * - ./ (bare) | |
b44ebb19 | 669 | * - ../.git |
e90fdc39 JS |
670 | * - ../.git/ |
671 | * - ../ (bare) | |
672 | * - ../../.git/ | |
673 | * etc. | |
892c41b9 | 674 | */ |
cf87463e | 675 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 676 | if (one_filesystem) |
2565b43b | 677 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 678 | for (;;) { |
13d6ec91 | 679 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
680 | if (gitfile) |
681 | gitdirenv = gitfile = xstrdup(gitfile); | |
682 | else { | |
683 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
684 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
685 | } | |
686 | ||
687 | if (gitdirenv) { | |
688 | ret = setup_discovered_git_dir(gitdirenv, | |
689 | cwd, offset, len, | |
690 | nongit_ok); | |
691 | free(gitfile); | |
692 | return ret; | |
693 | } | |
694 | free(gitfile); | |
695 | ||
68698da5 | 696 | if (is_git_directory(".")) |
1cd8031b NTND |
697 | return setup_bare_git_dir(cwd, offset, len, nongit_ok); |
698 | ||
2565b43b CB |
699 | offset_parent = offset; |
700 | while (--offset_parent > ceil_offset && cwd[offset_parent] != '/'); | |
701 | if (offset_parent <= ceil_offset) | |
f161edeb | 702 | return setup_nongit(cwd, nongit_ok); |
8030e442 | 703 | if (one_filesystem) { |
2565b43b | 704 | dev_t parent_device = get_device_or_die("..", cwd, offset); |
60c98d1e | 705 | if (parent_device != current_device) { |
8030e442 LD |
706 | if (nongit_ok) { |
707 | if (chdir(cwd)) | |
708 | die_errno("Cannot come back to cwd"); | |
709 | *nongit_ok = 1; | |
710 | return NULL; | |
711 | } | |
712 | cwd[offset] = '\0'; | |
2565b43b | 713 | die("Not a git repository (or any parent up to mount point %s)\n" |
cf87463e | 714 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); |
8030e442 LD |
715 | } |
716 | } | |
502ffe34 LD |
717 | if (chdir("..")) { |
718 | cwd[offset] = '\0'; | |
d824cbba | 719 | die_errno("Cannot change to '%s/..'", cwd); |
502ffe34 | 720 | } |
2565b43b | 721 | offset = offset_parent; |
892c41b9 | 722 | } |
d288a700 | 723 | } |
5e7bfe25 | 724 | |
a60645f9 NTND |
725 | const char *setup_git_directory_gently(int *nongit_ok) |
726 | { | |
727 | const char *prefix; | |
728 | ||
729 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f DA |
730 | if (prefix) |
731 | setenv("GIT_PREFIX", prefix, 1); | |
732 | else | |
733 | setenv("GIT_PREFIX", "", 1); | |
734 | ||
f07d6a1a | 735 | if (startup_info) { |
a60645f9 | 736 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
737 | startup_info->prefix = prefix; |
738 | } | |
a60645f9 NTND |
739 | return prefix; |
740 | } | |
741 | ||
94df2506 JH |
742 | int git_config_perm(const char *var, const char *value) |
743 | { | |
06cbe855 HO |
744 | int i; |
745 | char *endptr; | |
746 | ||
747 | if (value == NULL) | |
748 | return PERM_GROUP; | |
749 | ||
750 | if (!strcmp(value, "umask")) | |
751 | return PERM_UMASK; | |
752 | if (!strcmp(value, "group")) | |
753 | return PERM_GROUP; | |
754 | if (!strcmp(value, "all") || | |
755 | !strcmp(value, "world") || | |
756 | !strcmp(value, "everybody")) | |
757 | return PERM_EVERYBODY; | |
758 | ||
759 | /* Parse octal numbers */ | |
760 | i = strtol(value, &endptr, 8); | |
761 | ||
762 | /* If not an octal number, maybe true/false? */ | |
763 | if (*endptr != 0) | |
764 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
765 | ||
766 | /* | |
767 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 768 | * a chmod value to restrict to. |
06cbe855 HO |
769 | */ |
770 | switch (i) { | |
771 | case PERM_UMASK: /* 0 */ | |
772 | return PERM_UMASK; | |
773 | case OLD_PERM_GROUP: /* 1 */ | |
774 | return PERM_GROUP; | |
775 | case OLD_PERM_EVERYBODY: /* 2 */ | |
776 | return PERM_EVERYBODY; | |
94df2506 | 777 | } |
06cbe855 HO |
778 | |
779 | /* A filemode value was given: 0xxx */ | |
780 | ||
781 | if ((i & 0600) != 0600) | |
782 | die("Problem with core.sharedRepository filemode value " | |
783 | "(0%.3o).\nThe owner of files must always have " | |
784 | "read and write permissions.", i); | |
785 | ||
786 | /* | |
787 | * Mask filemode value. Others can not get write permission. | |
788 | * x flags for directories are handled separately. | |
789 | */ | |
5a688fe4 | 790 | return -(i & 0666); |
94df2506 JH |
791 | } |
792 | ||
ef90d6d4 | 793 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 794 | { |
299726d5 JS |
795 | if (strcmp(var, "core.repositoryformatversion") == 0) |
796 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 797 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 798 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
799 | else if (strcmp(var, "core.bare") == 0) { |
800 | is_bare_repository_cfg = git_config_bool(var, value); | |
801 | if (is_bare_repository_cfg == 1) | |
802 | inside_work_tree = -1; | |
803 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
804 | if (!value) |
805 | return config_error_nonbool(var); | |
8e0f7003 | 806 | free(git_work_tree_cfg); |
e90fdc39 JS |
807 | git_work_tree_cfg = xstrdup(value); |
808 | inside_work_tree = -1; | |
809 | } | |
299726d5 | 810 | return 0; |
ab9cb76f JH |
811 | } |
812 | ||
813 | int check_repository_format(void) | |
814 | { | |
337e51ce | 815 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
816 | } |
817 | ||
e1e5ec86 CB |
818 | /* |
819 | * Returns the "prefix", a path to the current working directory | |
820 | * relative to the work tree root, or NULL, if the current working | |
821 | * directory is not a strict subdirectory of the work tree root. The | |
822 | * prefix always ends with a '/' character. | |
823 | */ | |
5e7bfe25 JH |
824 | const char *setup_git_directory(void) |
825 | { | |
b3f66fd3 | 826 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 827 | } |
abc06822 FG |
828 | |
829 | const char *resolve_gitdir(const char *suspect) | |
830 | { | |
831 | if (is_git_directory(suspect)) | |
832 | return suspect; | |
efc5fb6a | 833 | return read_gitfile(suspect); |
abc06822 | 834 | } |