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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 | |
edc54fb5 | 7 | char *prefix_path(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: |
62525ef7 | 34 | die("'%s' is outside repository", orig); |
d089ebaa JH |
35 | } |
36 | if (sanitized[len] == '/') | |
37 | len++; | |
38 | memmove(sanitized, sanitized + len, total - len); | |
39 | } | |
40 | return sanitized; | |
f332726e LT |
41 | } |
42 | ||
a6080a0a | 43 | /* |
4ca06608 JH |
44 | * Unlike prefix_path, this should be used if the named file does |
45 | * not have to interact with index entry; i.e. name of a random file | |
46 | * on the filesystem. | |
47 | */ | |
48 | const char *prefix_filename(const char *pfx, int pfx_len, const char *arg) | |
49 | { | |
50 | static char path[PATH_MAX]; | |
71064e3f | 51 | #ifndef WIN32 |
9e5f5d4c | 52 | if (!pfx_len || is_absolute_path(arg)) |
4ca06608 JH |
53 | return arg; |
54 | memcpy(path, pfx, pfx_len); | |
55 | strcpy(path + pfx_len, arg); | |
25fe217b JS |
56 | #else |
57 | char *p; | |
58 | /* don't add prefix to absolute paths, but still replace '\' by '/' */ | |
59 | if (is_absolute_path(arg)) | |
60 | pfx_len = 0; | |
9e5f5d4c | 61 | else if (pfx_len) |
25fe217b JS |
62 | memcpy(path, pfx, pfx_len); |
63 | strcpy(path + pfx_len, arg); | |
64 | for (p = path + pfx_len; *p; p++) | |
65 | if (*p == '\\') | |
66 | *p = '/'; | |
67 | #endif | |
4ca06608 JH |
68 | return path; |
69 | } | |
70 | ||
c6e8c800 JH |
71 | int check_filename(const char *prefix, const char *arg) |
72 | { | |
73 | const char *name; | |
74 | struct stat st; | |
75 | ||
76 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
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 | ||
009fee47 MM |
84 | static void NORETURN die_verify_filename(const char *prefix, const char *arg) |
85 | { | |
86 | unsigned char sha1[20]; | |
87 | unsigned mode; | |
88 | /* try a detailed diagnostic ... */ | |
2e83b66c | 89 | get_sha1_with_mode_1(arg, sha1, &mode, 1, prefix); |
009fee47 MM |
90 | /* ... or fall back the most general message. */ |
91 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
92 | "Use '--' to separate paths from revisions", arg); | |
93 | ||
94 | } | |
95 | ||
e23d0b4a LT |
96 | /* |
97 | * Verify a filename that we got as an argument for a pathspec | |
98 | * entry. Note that a filename that begins with "-" never verifies | |
99 | * as true, because even if such a filename were to exist, we want | |
100 | * it to be preceded by the "--" marker (or we want the user to | |
101 | * use a format like "./-filename") | |
102 | */ | |
103 | void verify_filename(const char *prefix, const char *arg) | |
104 | { | |
e23d0b4a LT |
105 | if (*arg == '-') |
106 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 107 | if (check_filename(prefix, arg)) |
e23d0b4a | 108 | return; |
009fee47 | 109 | die_verify_filename(prefix, arg); |
e23d0b4a LT |
110 | } |
111 | ||
ea92f41f JH |
112 | /* |
113 | * Opposite of the above: the command line did not have -- marker | |
114 | * and we parsed the arg as a refname. It should not be interpretable | |
115 | * as a filename. | |
116 | */ | |
117 | void verify_non_filename(const char *prefix, const char *arg) | |
118 | { | |
7ae3df8c | 119 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 120 | return; |
ea92f41f JH |
121 | if (*arg == '-') |
122 | return; /* flag */ | |
c6e8c800 JH |
123 | if (!check_filename(prefix, arg)) |
124 | return; | |
125 | die("ambiguous argument '%s': both revision and filename\n" | |
126 | "Use '--' to separate filenames from revisions", arg); | |
ea92f41f JH |
127 | } |
128 | ||
8a42c985 JH |
129 | /* |
130 | * Magic pathspec | |
131 | * | |
132 | * NEEDSWORK: These need to be moved to dir.h or even to a new | |
133 | * pathspec.h when we restructure get_pathspec() users to use the | |
134 | * "struct pathspec" interface. | |
135 | * | |
136 | * Possible future magic semantics include stuff like: | |
137 | * | |
138 | * { PATHSPEC_NOGLOB, '!', "noglob" }, | |
6d942927 | 139 | * { PATHSPEC_ICASE, '\0', "icase" }, |
8a42c985 JH |
140 | * { PATHSPEC_RECURSIVE, '*', "recursive" }, |
141 | * { PATHSPEC_REGEXP, '\0', "regexp" }, | |
142 | * | |
143 | */ | |
144 | #define PATHSPEC_FROMTOP (1<<0) | |
145 | ||
146 | struct pathspec_magic { | |
147 | unsigned bit; | |
148 | char mnemonic; /* this cannot be ':'! */ | |
149 | const char *name; | |
150 | } pathspec_magic[] = { | |
151 | { PATHSPEC_FROMTOP, '/', "top" }, | |
152 | }; | |
153 | ||
154 | /* | |
155 | * Take an element of a pathspec and check for magic signatures. | |
156 | * Append the result to the prefix. | |
157 | * | |
158 | * For now, we only parse the syntax and throw out anything other than | |
159 | * "top" magic. | |
160 | * | |
161 | * NEEDSWORK: This needs to be rewritten when we start migrating | |
162 | * get_pathspec() users to use the "struct pathspec" interface. For | |
163 | * example, a pathspec element may be marked as case-insensitive, but | |
164 | * the prefix part must always match literally, and a single stupid | |
165 | * string cannot express such a case. | |
166 | */ | |
167 | const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt) | |
168 | { | |
169 | unsigned magic = 0; | |
170 | const char *copyfrom = elt; | |
6d942927 | 171 | int i; |
8a42c985 JH |
172 | |
173 | if (elt[0] != ':') { | |
174 | ; /* nothing to do */ | |
175 | } else if (elt[1] == '(') { | |
176 | /* longhand */ | |
177 | const char *nextat; | |
178 | for (copyfrom = elt + 2; | |
179 | *copyfrom && *copyfrom != ')'; | |
180 | copyfrom = nextat) { | |
181 | size_t len = strcspn(copyfrom, ",)"); | |
182 | if (copyfrom[len] == ')') | |
183 | nextat = copyfrom + len; | |
184 | else | |
185 | nextat = copyfrom + len + 1; | |
186 | if (!len) | |
187 | continue; | |
188 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) | |
189 | if (strlen(pathspec_magic[i].name) == len && | |
190 | !strncmp(pathspec_magic[i].name, copyfrom, len)) { | |
191 | magic |= pathspec_magic[i].bit; | |
192 | break; | |
193 | } | |
194 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
195 | die("Invalid pathspec magic '%.*s' in '%s'", | |
196 | (int) len, copyfrom, elt); | |
197 | } | |
198 | if (*copyfrom == ')') | |
199 | copyfrom++; | |
200 | } else { | |
201 | /* shorthand */ | |
202 | for (copyfrom = elt + 1; | |
203 | *copyfrom && *copyfrom != ':'; | |
204 | copyfrom++) { | |
205 | char ch = *copyfrom; | |
2f6c9760 JH |
206 | |
207 | if (!is_pathspec_magic(ch)) | |
208 | break; | |
8a42c985 JH |
209 | for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) |
210 | if (pathspec_magic[i].mnemonic == ch) { | |
211 | magic |= pathspec_magic[i].bit; | |
212 | break; | |
213 | } | |
214 | if (ARRAY_SIZE(pathspec_magic) <= i) | |
2f6c9760 JH |
215 | die("Unimplemented pathspec magic '%c' in '%s'", |
216 | ch, elt); | |
8a42c985 JH |
217 | } |
218 | if (*copyfrom == ':') | |
219 | copyfrom++; | |
220 | } | |
221 | ||
222 | if (magic & PATHSPEC_FROMTOP) | |
6d942927 | 223 | return xstrdup(copyfrom); |
8a42c985 | 224 | else |
6d942927 | 225 | return prefix_path(prefix, prefixlen, copyfrom); |
8a42c985 JH |
226 | } |
227 | ||
6b5ee137 | 228 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 229 | { |
6b5ee137 | 230 | const char *entry = *pathspec; |
d089ebaa | 231 | const char **src, **dst; |
d288a700 LT |
232 | int prefixlen; |
233 | ||
f332726e LT |
234 | if (!prefix && !entry) |
235 | return NULL; | |
d288a700 LT |
236 | |
237 | if (!entry) { | |
238 | static const char *spec[2]; | |
239 | spec[0] = prefix; | |
240 | spec[1] = NULL; | |
241 | return spec; | |
242 | } | |
243 | ||
244 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
245 | src = pathspec; |
246 | dst = pathspec; | |
f332726e | 247 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa | 248 | while (*src) { |
8a42c985 | 249 | *(dst++) = prefix_pathspec(prefix, prefixlen, *src); |
d089ebaa JH |
250 | src++; |
251 | } | |
252 | *dst = NULL; | |
253 | if (!*pathspec) | |
254 | return NULL; | |
255 | return pathspec; | |
d288a700 LT |
256 | } |
257 | ||
5f5608bc | 258 | /* |
ad1a382f | 259 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 260 | * We want to see: |
5f5608bc | 261 | * |
790296fd | 262 | * - either an objects/ directory _or_ the proper |
5f5608bc | 263 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 264 | * - a refs/ directory |
8098a178 | 265 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
266 | * a proper "ref:", or a regular file HEAD that has a properly |
267 | * formatted sha1 object name. | |
5f5608bc | 268 | */ |
ad1a382f | 269 | static int is_git_directory(const char *suspect) |
5f5608bc | 270 | { |
ad1a382f SP |
271 | char path[PATH_MAX]; |
272 | size_t len = strlen(suspect); | |
273 | ||
3c9d0414 GB |
274 | if (PATH_MAX <= len + strlen("/objects")) |
275 | die("Too long path: %.*s", 60, suspect); | |
ad1a382f SP |
276 | strcpy(path, suspect); |
277 | if (getenv(DB_ENVIRONMENT)) { | |
278 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
279 | return 0; | |
280 | } | |
281 | else { | |
282 | strcpy(path + len, "/objects"); | |
283 | if (access(path, X_OK)) | |
284 | return 0; | |
285 | } | |
286 | ||
287 | strcpy(path + len, "/refs"); | |
288 | if (access(path, X_OK)) | |
8098a178 | 289 | return 0; |
ad1a382f SP |
290 | |
291 | strcpy(path + len, "/HEAD"); | |
c847f537 | 292 | if (validate_headref(path)) |
ad1a382f SP |
293 | return 0; |
294 | ||
8098a178 | 295 | return 1; |
5f5608bc LT |
296 | } |
297 | ||
68025633 JS |
298 | int is_inside_git_dir(void) |
299 | { | |
e90fdc39 JS |
300 | if (inside_git_dir < 0) |
301 | inside_git_dir = is_inside_dir(get_git_dir()); | |
302 | return inside_git_dir; | |
892c41b9 ML |
303 | } |
304 | ||
892c41b9 ML |
305 | int is_inside_work_tree(void) |
306 | { | |
e90fdc39 JS |
307 | if (inside_work_tree < 0) |
308 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
309 | return inside_work_tree; | |
892c41b9 ML |
310 | } |
311 | ||
f3fa1838 JH |
312 | void setup_work_tree(void) |
313 | { | |
354e6534 JS |
314 | const char *work_tree, *git_dir; |
315 | static int initialized = 0; | |
316 | ||
317 | if (initialized) | |
318 | return; | |
319 | work_tree = get_git_work_tree(); | |
320 | git_dir = get_git_dir(); | |
59f0f2f3 | 321 | if (!is_absolute_path(git_dir)) |
e2a57aac | 322 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
323 | if (!work_tree || chdir(work_tree)) |
324 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
325 | |
326 | /* | |
327 | * Make sure subsequent git processes find correct worktree | |
328 | * if $GIT_WORK_TREE is set relative | |
329 | */ | |
330 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
331 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
332 | ||
e2a57aac | 333 | set_git_dir(relative_path(git_dir, work_tree)); |
354e6534 | 334 | initialized = 1; |
59f0f2f3 MH |
335 | } |
336 | ||
337e51ce | 337 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 338 | { |
337e51ce NTND |
339 | char repo_config[PATH_MAX+1]; |
340 | ||
341 | /* | |
342 | * git_config() can't be used here because it calls git_pathdup() | |
343 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
344 | * set git_dir to ".git". | |
345 | * | |
346 | * We are in gitdir setup, no git dir has been found useable yet. | |
347 | * Use a gentler version of git_config() to check if this repo | |
348 | * is a good one. | |
349 | */ | |
350 | snprintf(repo_config, PATH_MAX, "%s/config", gitdir); | |
351 | git_config_early(check_repository_format_version, NULL, repo_config); | |
9459aa77 NTND |
352 | if (GIT_REPO_VERSION < repository_format_version) { |
353 | if (!nongit_ok) | |
354 | die ("Expected git repo version <= %d, found %d", | |
355 | GIT_REPO_VERSION, repository_format_version); | |
356 | warning("Expected git repo version <= %d, found %d", | |
357 | GIT_REPO_VERSION, repository_format_version); | |
358 | warning("Please upgrade Git"); | |
359 | *nongit_ok = -1; | |
360 | return -1; | |
361 | } | |
362 | return 0; | |
363 | } | |
364 | ||
b44ebb19 LH |
365 | /* |
366 | * Try to read the location of the git directory from the .git file, | |
367 | * return path to git directory if found. | |
368 | */ | |
369 | const char *read_gitfile_gently(const char *path) | |
370 | { | |
371 | char *buf; | |
40c813e0 BK |
372 | char *dir; |
373 | const char *slash; | |
b44ebb19 LH |
374 | struct stat st; |
375 | int fd; | |
376 | size_t len; | |
377 | ||
378 | if (stat(path, &st)) | |
379 | return NULL; | |
380 | if (!S_ISREG(st.st_mode)) | |
381 | return NULL; | |
382 | fd = open(path, O_RDONLY); | |
383 | if (fd < 0) | |
d824cbba | 384 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
385 | buf = xmalloc(st.st_size + 1); |
386 | len = read_in_full(fd, buf, st.st_size); | |
387 | close(fd); | |
388 | if (len != st.st_size) | |
389 | die("Error reading %s", path); | |
390 | buf[len] = '\0'; | |
391 | if (prefixcmp(buf, "gitdir: ")) | |
392 | die("Invalid gitfile format: %s", path); | |
393 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
394 | len--; | |
395 | if (len < 9) | |
396 | die("No path in gitfile: %s", path); | |
397 | buf[len] = '\0'; | |
40c813e0 BK |
398 | dir = buf + 8; |
399 | ||
400 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
401 | size_t pathlen = slash+1 - path; | |
402 | size_t dirlen = pathlen + len - 8; | |
403 | dir = xmalloc(dirlen + 1); | |
404 | strncpy(dir, path, pathlen); | |
405 | strncpy(dir + pathlen, buf + 8, len - 8); | |
406 | dir[dirlen] = '\0'; | |
407 | free(buf); | |
408 | buf = dir; | |
409 | } | |
410 | ||
411 | if (!is_git_directory(dir)) | |
412 | die("Not a git repository: %s", dir); | |
e2a57aac | 413 | path = real_path(dir); |
40c813e0 | 414 | |
b44ebb19 LH |
415 | free(buf); |
416 | return path; | |
417 | } | |
418 | ||
e4e30347 | 419 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
b3f66fd3 NTND |
420 | char *cwd, int len, |
421 | int *nongit_ok) | |
e4e30347 | 422 | { |
b3f66fd3 NTND |
423 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
424 | const char *worktree; | |
425 | char *gitfile; | |
e4e30347 JN |
426 | |
427 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
428 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 NTND |
429 | |
430 | gitfile = (char*)read_gitfile_gently(gitdirenv); | |
431 | if (gitfile) { | |
432 | gitfile = xstrdup(gitfile); | |
433 | gitdirenv = gitfile; | |
434 | } | |
435 | ||
e4e30347 JN |
436 | if (!is_git_directory(gitdirenv)) { |
437 | if (nongit_ok) { | |
438 | *nongit_ok = 1; | |
b3f66fd3 | 439 | free(gitfile); |
e4e30347 JN |
440 | return NULL; |
441 | } | |
442 | die("Not a git repository: '%s'", gitdirenv); | |
443 | } | |
b3f66fd3 NTND |
444 | |
445 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
446 | free(gitfile); | |
447 | return NULL; | |
e4e30347 | 448 | } |
b3f66fd3 NTND |
449 | |
450 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
451 | if (work_tree_env) | |
452 | set_git_work_tree(work_tree_env); | |
453 | else if (is_bare_repository_cfg > 0) { | |
454 | if (git_work_tree_cfg) /* #22.2, #30 */ | |
455 | die("core.bare and core.worktree do not make sense"); | |
456 | ||
457 | /* #18, #26 */ | |
458 | set_git_dir(gitdirenv); | |
459 | free(gitfile); | |
e4e30347 | 460 | return NULL; |
b3f66fd3 NTND |
461 | } |
462 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
463 | if (is_absolute_path(git_work_tree_cfg)) | |
464 | set_git_work_tree(git_work_tree_cfg); | |
465 | else { | |
466 | char core_worktree[PATH_MAX]; | |
467 | if (chdir(gitdirenv)) | |
468 | die_errno("Could not chdir to '%s'", gitdirenv); | |
469 | if (chdir(git_work_tree_cfg)) | |
470 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
471 | if (!getcwd(core_worktree, PATH_MAX)) | |
472 | die_errno("Could not get directory '%s'", git_work_tree_cfg); | |
473 | if (chdir(cwd)) | |
474 | die_errno("Could not come back to cwd"); | |
475 | set_git_work_tree(core_worktree); | |
476 | } | |
477 | } | |
478 | else /* #2, #10 */ | |
479 | set_git_work_tree("."); | |
480 | ||
481 | /* set_git_work_tree() must have been called by now */ | |
482 | worktree = get_git_work_tree(); | |
483 | ||
484 | /* both get_git_work_tree() and cwd are already normalized */ | |
485 | if (!strcmp(cwd, worktree)) { /* cwd == worktree */ | |
486 | set_git_dir(gitdirenv); | |
487 | free(gitfile); | |
e4e30347 | 488 | return NULL; |
b3f66fd3 | 489 | } |
e4e30347 | 490 | |
b3f66fd3 NTND |
491 | if (!prefixcmp(cwd, worktree) && |
492 | cwd[strlen(worktree)] == '/') { /* cwd inside worktree */ | |
e2a57aac | 493 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
494 | if (chdir(worktree)) |
495 | die_errno("Could not chdir to '%s'", worktree); | |
496 | cwd[len++] = '/'; | |
497 | cwd[len] = '\0'; | |
498 | free(gitfile); | |
499 | return cwd + strlen(worktree) + 1; | |
93a00542 | 500 | } |
b3f66fd3 NTND |
501 | |
502 | /* cwd outside worktree */ | |
503 | set_git_dir(gitdirenv); | |
504 | free(gitfile); | |
505 | return NULL; | |
93a00542 JN |
506 | } |
507 | ||
9951d3b3 NTND |
508 | static const char *setup_discovered_git_dir(const char *gitdir, |
509 | char *cwd, int offset, int len, | |
510 | int *nongit_ok) | |
98937bef | 511 | { |
9951d3b3 NTND |
512 | if (check_repository_format_gently(gitdir, nongit_ok)) |
513 | return NULL; | |
98937bef | 514 | |
4868b2ea JN |
515 | /* --work-tree is set without --git-dir; use discovered one */ |
516 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
517 | if (offset != len && !is_absolute_path(gitdir)) | |
e2a57aac | 518 | gitdir = xstrdup(real_path(gitdir)); |
4868b2ea JN |
519 | if (chdir(cwd)) |
520 | die_errno("Could not come back to cwd"); | |
521 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
522 | } | |
523 | ||
9951d3b3 NTND |
524 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
525 | if (is_bare_repository_cfg > 0) { | |
e2a57aac | 526 | set_git_dir(offset == len ? gitdir : real_path(gitdir)); |
9951d3b3 NTND |
527 | if (chdir(cwd)) |
528 | die_errno("Could not come back to cwd"); | |
98937bef | 529 | return NULL; |
9951d3b3 | 530 | } |
98937bef | 531 | |
9951d3b3 NTND |
532 | /* #0, #1, #5, #8, #9, #12, #13 */ |
533 | set_git_work_tree("."); | |
534 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
535 | set_git_dir(gitdir); | |
98937bef | 536 | inside_git_dir = 0; |
9951d3b3 | 537 | inside_work_tree = 1; |
98937bef NTND |
538 | if (offset == len) |
539 | return NULL; | |
540 | ||
541 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
542 | offset++; | |
543 | cwd[len++] = '/'; | |
544 | cwd[len] = 0; | |
545 | return cwd + offset; | |
546 | } | |
547 | ||
1cd8031b NTND |
548 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
549 | static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok) | |
68698da5 JN |
550 | { |
551 | int root_len; | |
552 | ||
1cd8031b NTND |
553 | if (check_repository_format_gently(".", nongit_ok)) |
554 | return NULL; | |
555 | ||
4868b2ea JN |
556 | /* --work-tree is set without --git-dir; use discovered one */ |
557 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
558 | const char *gitdir; | |
559 | ||
560 | gitdir = offset == len ? "." : xmemdupz(cwd, offset); | |
561 | if (chdir(cwd)) | |
562 | die_errno("Could not come back to cwd"); | |
563 | return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok); | |
564 | } | |
565 | ||
68698da5 | 566 | inside_git_dir = 1; |
1cd8031b | 567 | inside_work_tree = 0; |
68698da5 | 568 | if (offset != len) { |
8fc0ae80 NTND |
569 | if (chdir(cwd)) |
570 | die_errno("Cannot come back to cwd"); | |
68698da5 JN |
571 | root_len = offset_1st_component(cwd); |
572 | cwd[offset > root_len ? offset : root_len] = '\0'; | |
573 | set_git_dir(cwd); | |
337e51ce | 574 | } |
1cd8031b | 575 | else |
68698da5 | 576 | set_git_dir("."); |
68698da5 JN |
577 | return NULL; |
578 | } | |
579 | ||
f161edeb JN |
580 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
581 | { | |
582 | if (!nongit_ok) | |
583 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
584 | if (chdir(cwd)) | |
585 | die_errno("Cannot come back to cwd"); | |
586 | *nongit_ok = 1; | |
587 | return NULL; | |
588 | } | |
589 | ||
60c98d1e JN |
590 | static dev_t get_device_or_die(const char *path, const char *prefix) |
591 | { | |
592 | struct stat buf; | |
593 | if (stat(path, &buf)) | |
594 | die_errno("failed to stat '%s%s%s'", | |
595 | prefix ? prefix : "", | |
596 | prefix ? "/" : "", path); | |
597 | return buf.st_dev; | |
598 | } | |
599 | ||
e90fdc39 JS |
600 | /* |
601 | * We cannot decide in this function whether we are in the work tree or | |
602 | * not, since the config can only be read _after_ this function was called. | |
603 | */ | |
a60645f9 | 604 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 605 | { |
0454dd93 | 606 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
d288a700 | 607 | static char cwd[PATH_MAX+1]; |
9951d3b3 NTND |
608 | const char *gitdirenv, *ret; |
609 | char *gitfile; | |
98937bef | 610 | int len, offset, ceil_offset; |
c7d1d1b1 RH |
611 | dev_t current_device = 0; |
612 | int one_filesystem = 1; | |
d288a700 | 613 | |
af05d679 SG |
614 | /* |
615 | * Let's assume that we are in a git repository. | |
616 | * If it turns out later that we are somewhere else, the value will be | |
617 | * updated accordingly. | |
618 | */ | |
619 | if (nongit_ok) | |
620 | *nongit_ok = 0; | |
621 | ||
b3f66fd3 NTND |
622 | if (!getcwd(cwd, sizeof(cwd)-1)) |
623 | die_errno("Unable to read current working directory"); | |
624 | offset = len = strlen(cwd); | |
625 | ||
e90fdc39 JS |
626 | /* |
627 | * If GIT_DIR is set explicitly, we're not going | |
628 | * to do any discovery, but we still do repository | |
629 | * validation. | |
630 | */ | |
ad1a382f | 631 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 632 | if (gitdirenv) |
b3f66fd3 | 633 | return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok); |
d288a700 | 634 | |
0454dd93 | 635 | ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs); |
17d778e7 JH |
636 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
637 | ceil_offset = 1; | |
d288a700 | 638 | |
892c41b9 | 639 | /* |
e90fdc39 | 640 | * Test in the following order (relative to the cwd): |
b44ebb19 | 641 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
642 | * - .git/ |
643 | * - ./ (bare) | |
b44ebb19 | 644 | * - ../.git |
e90fdc39 JS |
645 | * - ../.git/ |
646 | * - ../ (bare) | |
647 | * - ../../.git/ | |
648 | * etc. | |
892c41b9 | 649 | */ |
cf87463e | 650 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e JN |
651 | if (one_filesystem) |
652 | current_device = get_device_or_die(".", NULL); | |
e90fdc39 | 653 | for (;;) { |
9951d3b3 NTND |
654 | gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); |
655 | if (gitfile) | |
656 | gitdirenv = gitfile = xstrdup(gitfile); | |
657 | else { | |
658 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
659 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
660 | } | |
661 | ||
662 | if (gitdirenv) { | |
663 | ret = setup_discovered_git_dir(gitdirenv, | |
664 | cwd, offset, len, | |
665 | nongit_ok); | |
666 | free(gitfile); | |
667 | return ret; | |
668 | } | |
669 | free(gitfile); | |
670 | ||
68698da5 | 671 | if (is_git_directory(".")) |
1cd8031b NTND |
672 | return setup_bare_git_dir(cwd, offset, len, nongit_ok); |
673 | ||
0454dd93 | 674 | while (--offset > ceil_offset && cwd[offset] != '/'); |
f161edeb JN |
675 | if (offset <= ceil_offset) |
676 | return setup_nongit(cwd, nongit_ok); | |
8030e442 | 677 | if (one_filesystem) { |
60c98d1e JN |
678 | dev_t parent_device = get_device_or_die("..", cwd); |
679 | if (parent_device != current_device) { | |
8030e442 LD |
680 | if (nongit_ok) { |
681 | if (chdir(cwd)) | |
682 | die_errno("Cannot come back to cwd"); | |
683 | *nongit_ok = 1; | |
684 | return NULL; | |
685 | } | |
686 | cwd[offset] = '\0'; | |
687 | die("Not a git repository (or any parent up to mount parent %s)\n" | |
cf87463e | 688 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd); |
8030e442 LD |
689 | } |
690 | } | |
502ffe34 LD |
691 | if (chdir("..")) { |
692 | cwd[offset] = '\0'; | |
d824cbba | 693 | die_errno("Cannot change to '%s/..'", cwd); |
502ffe34 | 694 | } |
892c41b9 | 695 | } |
d288a700 | 696 | } |
5e7bfe25 | 697 | |
a60645f9 NTND |
698 | const char *setup_git_directory_gently(int *nongit_ok) |
699 | { | |
700 | const char *prefix; | |
701 | ||
702 | prefix = setup_git_directory_gently_1(nongit_ok); | |
f07d6a1a | 703 | if (startup_info) { |
a60645f9 | 704 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
705 | startup_info->prefix = prefix; |
706 | } | |
a60645f9 NTND |
707 | return prefix; |
708 | } | |
709 | ||
94df2506 JH |
710 | int git_config_perm(const char *var, const char *value) |
711 | { | |
06cbe855 HO |
712 | int i; |
713 | char *endptr; | |
714 | ||
715 | if (value == NULL) | |
716 | return PERM_GROUP; | |
717 | ||
718 | if (!strcmp(value, "umask")) | |
719 | return PERM_UMASK; | |
720 | if (!strcmp(value, "group")) | |
721 | return PERM_GROUP; | |
722 | if (!strcmp(value, "all") || | |
723 | !strcmp(value, "world") || | |
724 | !strcmp(value, "everybody")) | |
725 | return PERM_EVERYBODY; | |
726 | ||
727 | /* Parse octal numbers */ | |
728 | i = strtol(value, &endptr, 8); | |
729 | ||
730 | /* If not an octal number, maybe true/false? */ | |
731 | if (*endptr != 0) | |
732 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
733 | ||
734 | /* | |
735 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 736 | * a chmod value to restrict to. |
06cbe855 HO |
737 | */ |
738 | switch (i) { | |
739 | case PERM_UMASK: /* 0 */ | |
740 | return PERM_UMASK; | |
741 | case OLD_PERM_GROUP: /* 1 */ | |
742 | return PERM_GROUP; | |
743 | case OLD_PERM_EVERYBODY: /* 2 */ | |
744 | return PERM_EVERYBODY; | |
94df2506 | 745 | } |
06cbe855 HO |
746 | |
747 | /* A filemode value was given: 0xxx */ | |
748 | ||
749 | if ((i & 0600) != 0600) | |
750 | die("Problem with core.sharedRepository filemode value " | |
751 | "(0%.3o).\nThe owner of files must always have " | |
752 | "read and write permissions.", i); | |
753 | ||
754 | /* | |
755 | * Mask filemode value. Others can not get write permission. | |
756 | * x flags for directories are handled separately. | |
757 | */ | |
5a688fe4 | 758 | return -(i & 0666); |
94df2506 JH |
759 | } |
760 | ||
ef90d6d4 | 761 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 762 | { |
299726d5 JS |
763 | if (strcmp(var, "core.repositoryformatversion") == 0) |
764 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 765 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 766 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
767 | else if (strcmp(var, "core.bare") == 0) { |
768 | is_bare_repository_cfg = git_config_bool(var, value); | |
769 | if (is_bare_repository_cfg == 1) | |
770 | inside_work_tree = -1; | |
771 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
772 | if (!value) |
773 | return config_error_nonbool(var); | |
8e0f7003 | 774 | free(git_work_tree_cfg); |
e90fdc39 JS |
775 | git_work_tree_cfg = xstrdup(value); |
776 | inside_work_tree = -1; | |
777 | } | |
299726d5 | 778 | return 0; |
ab9cb76f JH |
779 | } |
780 | ||
781 | int check_repository_format(void) | |
782 | { | |
337e51ce | 783 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
784 | } |
785 | ||
e1e5ec86 CB |
786 | /* |
787 | * Returns the "prefix", a path to the current working directory | |
788 | * relative to the work tree root, or NULL, if the current working | |
789 | * directory is not a strict subdirectory of the work tree root. The | |
790 | * prefix always ends with a '/' character. | |
791 | */ | |
5e7bfe25 JH |
792 | const char *setup_git_directory(void) |
793 | { | |
b3f66fd3 | 794 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 795 | } |