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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 | |
d089ebaa JH |
7 | const char *prefix_path(const char *prefix, int len, const char *path) |
8 | { | |
9 | const char *orig = path; | |
10 | char *sanitized = xmalloc(len + strlen(path) + 1); | |
9a13ba1b | 11 | if (is_absolute_path(orig)) |
d089ebaa JH |
12 | strcpy(sanitized, path); |
13 | else { | |
14 | if (len) | |
15 | memcpy(sanitized, prefix, len); | |
16 | strcpy(sanitized + len, path); | |
f332726e | 17 | } |
f3cad0ad | 18 | if (normalize_path_copy(sanitized, sanitized)) |
d089ebaa | 19 | goto error_out; |
9a13ba1b | 20 | if (is_absolute_path(orig)) { |
d089ebaa JH |
21 | const char *work_tree = get_git_work_tree(); |
22 | size_t len = strlen(work_tree); | |
23 | size_t total = strlen(sanitized) + 1; | |
24 | if (strncmp(sanitized, work_tree, len) || | |
25 | (sanitized[len] != '\0' && sanitized[len] != '/')) { | |
26 | error_out: | |
62525ef7 | 27 | die("'%s' is outside repository", orig); |
d089ebaa JH |
28 | } |
29 | if (sanitized[len] == '/') | |
30 | len++; | |
31 | memmove(sanitized, sanitized + len, total - len); | |
32 | } | |
33 | return sanitized; | |
f332726e LT |
34 | } |
35 | ||
a6080a0a | 36 | /* |
4ca06608 JH |
37 | * Unlike prefix_path, this should be used if the named file does |
38 | * not have to interact with index entry; i.e. name of a random file | |
39 | * on the filesystem. | |
40 | */ | |
41 | const char *prefix_filename(const char *pfx, int pfx_len, const char *arg) | |
42 | { | |
43 | static char path[PATH_MAX]; | |
25fe217b | 44 | #ifndef __MINGW32__ |
ecf4831d | 45 | if (!pfx || !*pfx || is_absolute_path(arg)) |
4ca06608 JH |
46 | return arg; |
47 | memcpy(path, pfx, pfx_len); | |
48 | strcpy(path + pfx_len, arg); | |
25fe217b JS |
49 | #else |
50 | char *p; | |
51 | /* don't add prefix to absolute paths, but still replace '\' by '/' */ | |
52 | if (is_absolute_path(arg)) | |
53 | pfx_len = 0; | |
54 | else | |
55 | memcpy(path, pfx, pfx_len); | |
56 | strcpy(path + pfx_len, arg); | |
57 | for (p = path + pfx_len; *p; p++) | |
58 | if (*p == '\\') | |
59 | *p = '/'; | |
60 | #endif | |
4ca06608 JH |
61 | return path; |
62 | } | |
63 | ||
e23d0b4a LT |
64 | /* |
65 | * Verify a filename that we got as an argument for a pathspec | |
66 | * entry. Note that a filename that begins with "-" never verifies | |
67 | * as true, because even if such a filename were to exist, we want | |
68 | * it to be preceded by the "--" marker (or we want the user to | |
69 | * use a format like "./-filename") | |
70 | */ | |
71 | void verify_filename(const char *prefix, const char *arg) | |
72 | { | |
73 | const char *name; | |
74 | struct stat st; | |
75 | ||
76 | if (*arg == '-') | |
77 | die("bad flag '%s' used after filename", arg); | |
78 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
79 | if (!lstat(name, &st)) | |
80 | return; | |
81 | if (errno == ENOENT) | |
ea92f41f JH |
82 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
83 | "Use '--' to separate paths from revisions", arg); | |
d824cbba | 84 | die_errno("failed to stat '%s'", arg); |
e23d0b4a LT |
85 | } |
86 | ||
ea92f41f JH |
87 | /* |
88 | * Opposite of the above: the command line did not have -- marker | |
89 | * and we parsed the arg as a refname. It should not be interpretable | |
90 | * as a filename. | |
91 | */ | |
92 | void verify_non_filename(const char *prefix, const char *arg) | |
93 | { | |
94 | const char *name; | |
95 | struct stat st; | |
96 | ||
7ae3df8c | 97 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 98 | return; |
ea92f41f JH |
99 | if (*arg == '-') |
100 | return; /* flag */ | |
101 | name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg; | |
102 | if (!lstat(name, &st)) | |
103 | die("ambiguous argument '%s': both revision and filename\n" | |
104 | "Use '--' to separate filenames from revisions", arg); | |
33a798c8 | 105 | if (errno != ENOENT && errno != ENOTDIR) |
d824cbba | 106 | die_errno("failed to stat '%s'", arg); |
ea92f41f JH |
107 | } |
108 | ||
6b5ee137 | 109 | const char **get_pathspec(const char *prefix, const char **pathspec) |
d288a700 | 110 | { |
6b5ee137 | 111 | const char *entry = *pathspec; |
d089ebaa | 112 | const char **src, **dst; |
d288a700 LT |
113 | int prefixlen; |
114 | ||
f332726e LT |
115 | if (!prefix && !entry) |
116 | return NULL; | |
d288a700 LT |
117 | |
118 | if (!entry) { | |
119 | static const char *spec[2]; | |
120 | spec[0] = prefix; | |
121 | spec[1] = NULL; | |
122 | return spec; | |
123 | } | |
124 | ||
125 | /* Otherwise we have to re-write the entries.. */ | |
d089ebaa JH |
126 | src = pathspec; |
127 | dst = pathspec; | |
f332726e | 128 | prefixlen = prefix ? strlen(prefix) : 0; |
d089ebaa JH |
129 | while (*src) { |
130 | const char *p = prefix_path(prefix, prefixlen, *src); | |
62525ef7 | 131 | *(dst++) = p; |
d089ebaa JH |
132 | src++; |
133 | } | |
134 | *dst = NULL; | |
135 | if (!*pathspec) | |
136 | return NULL; | |
137 | return pathspec; | |
d288a700 LT |
138 | } |
139 | ||
5f5608bc | 140 | /* |
ad1a382f | 141 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 142 | * We want to see: |
5f5608bc | 143 | * |
790296fd | 144 | * - either an objects/ directory _or_ the proper |
5f5608bc | 145 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 146 | * - a refs/ directory |
8098a178 | 147 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
148 | * a proper "ref:", or a regular file HEAD that has a properly |
149 | * formatted sha1 object name. | |
5f5608bc | 150 | */ |
ad1a382f | 151 | static int is_git_directory(const char *suspect) |
5f5608bc | 152 | { |
ad1a382f SP |
153 | char path[PATH_MAX]; |
154 | size_t len = strlen(suspect); | |
155 | ||
156 | strcpy(path, suspect); | |
157 | if (getenv(DB_ENVIRONMENT)) { | |
158 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
159 | return 0; | |
160 | } | |
161 | else { | |
162 | strcpy(path + len, "/objects"); | |
163 | if (access(path, X_OK)) | |
164 | return 0; | |
165 | } | |
166 | ||
167 | strcpy(path + len, "/refs"); | |
168 | if (access(path, X_OK)) | |
8098a178 | 169 | return 0; |
ad1a382f SP |
170 | |
171 | strcpy(path + len, "/HEAD"); | |
c847f537 | 172 | if (validate_headref(path)) |
ad1a382f SP |
173 | return 0; |
174 | ||
8098a178 | 175 | return 1; |
5f5608bc LT |
176 | } |
177 | ||
68025633 JS |
178 | int is_inside_git_dir(void) |
179 | { | |
e90fdc39 JS |
180 | if (inside_git_dir < 0) |
181 | inside_git_dir = is_inside_dir(get_git_dir()); | |
182 | return inside_git_dir; | |
892c41b9 ML |
183 | } |
184 | ||
892c41b9 ML |
185 | int is_inside_work_tree(void) |
186 | { | |
e90fdc39 JS |
187 | if (inside_work_tree < 0) |
188 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
189 | return inside_work_tree; | |
892c41b9 ML |
190 | } |
191 | ||
e90fdc39 | 192 | /* |
7efeb8f0 JS |
193 | * set_work_tree() is only ever called if you set GIT_DIR explicitely. |
194 | * The old behaviour (which we retain here) is to set the work tree root | |
195 | * to the cwd, unless overridden by the config, the command line, or | |
196 | * GIT_WORK_TREE. | |
e90fdc39 | 197 | */ |
7efeb8f0 | 198 | static const char *set_work_tree(const char *dir) |
892c41b9 | 199 | { |
7efeb8f0 | 200 | char buffer[PATH_MAX + 1]; |
e90fdc39 | 201 | |
7efeb8f0 JS |
202 | if (!getcwd(buffer, sizeof(buffer))) |
203 | die ("Could not get the current working directory"); | |
204 | git_work_tree_cfg = xstrdup(buffer); | |
e90fdc39 JS |
205 | inside_work_tree = 1; |
206 | ||
7efeb8f0 | 207 | return NULL; |
68025633 JS |
208 | } |
209 | ||
f3fa1838 JH |
210 | void setup_work_tree(void) |
211 | { | |
354e6534 JS |
212 | const char *work_tree, *git_dir; |
213 | static int initialized = 0; | |
214 | ||
215 | if (initialized) | |
216 | return; | |
217 | work_tree = get_git_work_tree(); | |
218 | git_dir = get_git_dir(); | |
59f0f2f3 | 219 | if (!is_absolute_path(git_dir)) |
044bbbcb | 220 | git_dir = make_absolute_path(git_dir); |
59f0f2f3 MH |
221 | if (!work_tree || chdir(work_tree)) |
222 | die("This operation must be run in a work tree"); | |
044bbbcb | 223 | set_git_dir(make_relative_path(git_dir, work_tree)); |
354e6534 | 224 | initialized = 1; |
59f0f2f3 MH |
225 | } |
226 | ||
9459aa77 NTND |
227 | static int check_repository_format_gently(int *nongit_ok) |
228 | { | |
ef90d6d4 | 229 | git_config(check_repository_format_version, NULL); |
9459aa77 NTND |
230 | if (GIT_REPO_VERSION < repository_format_version) { |
231 | if (!nongit_ok) | |
232 | die ("Expected git repo version <= %d, found %d", | |
233 | GIT_REPO_VERSION, repository_format_version); | |
234 | warning("Expected git repo version <= %d, found %d", | |
235 | GIT_REPO_VERSION, repository_format_version); | |
236 | warning("Please upgrade Git"); | |
237 | *nongit_ok = -1; | |
238 | return -1; | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | ||
b44ebb19 LH |
243 | /* |
244 | * Try to read the location of the git directory from the .git file, | |
245 | * return path to git directory if found. | |
246 | */ | |
247 | const char *read_gitfile_gently(const char *path) | |
248 | { | |
249 | char *buf; | |
250 | struct stat st; | |
251 | int fd; | |
252 | size_t len; | |
253 | ||
254 | if (stat(path, &st)) | |
255 | return NULL; | |
256 | if (!S_ISREG(st.st_mode)) | |
257 | return NULL; | |
258 | fd = open(path, O_RDONLY); | |
259 | if (fd < 0) | |
d824cbba | 260 | die_errno("Error opening '%s'", path); |
b44ebb19 LH |
261 | buf = xmalloc(st.st_size + 1); |
262 | len = read_in_full(fd, buf, st.st_size); | |
263 | close(fd); | |
264 | if (len != st.st_size) | |
265 | die("Error reading %s", path); | |
266 | buf[len] = '\0'; | |
267 | if (prefixcmp(buf, "gitdir: ")) | |
268 | die("Invalid gitfile format: %s", path); | |
269 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
270 | len--; | |
271 | if (len < 9) | |
272 | die("No path in gitfile: %s", path); | |
273 | buf[len] = '\0'; | |
274 | if (!is_git_directory(buf + 8)) | |
275 | die("Not a git repository: %s", buf + 8); | |
276 | path = make_absolute_path(buf + 8); | |
277 | free(buf); | |
278 | return path; | |
279 | } | |
280 | ||
e90fdc39 JS |
281 | /* |
282 | * We cannot decide in this function whether we are in the work tree or | |
283 | * not, since the config can only be read _after_ this function was called. | |
284 | */ | |
4ca06608 | 285 | const char *setup_git_directory_gently(int *nongit_ok) |
d288a700 | 286 | { |
e90fdc39 | 287 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
0454dd93 | 288 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
d288a700 | 289 | static char cwd[PATH_MAX+1]; |
e90fdc39 | 290 | const char *gitdirenv; |
b44ebb19 | 291 | const char *gitfile_dir; |
0454dd93 | 292 | int len, offset, ceil_offset; |
d288a700 | 293 | |
af05d679 SG |
294 | /* |
295 | * Let's assume that we are in a git repository. | |
296 | * If it turns out later that we are somewhere else, the value will be | |
297 | * updated accordingly. | |
298 | */ | |
299 | if (nongit_ok) | |
300 | *nongit_ok = 0; | |
301 | ||
e90fdc39 JS |
302 | /* |
303 | * If GIT_DIR is set explicitly, we're not going | |
304 | * to do any discovery, but we still do repository | |
305 | * validation. | |
306 | */ | |
ad1a382f | 307 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e90fdc39 JS |
308 | if (gitdirenv) { |
309 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
310 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
311 | if (is_git_directory(gitdirenv)) { | |
dd5c8af1 JS |
312 | static char buffer[1024 + 1]; |
313 | const char *retval; | |
314 | ||
138dd1e9 NTND |
315 | if (!work_tree_env) { |
316 | retval = set_work_tree(gitdirenv); | |
9459aa77 NTND |
317 | /* config may override worktree */ |
318 | if (check_repository_format_gently(nongit_ok)) | |
319 | return NULL; | |
138dd1e9 NTND |
320 | return retval; |
321 | } | |
9459aa77 NTND |
322 | if (check_repository_format_gently(nongit_ok)) |
323 | return NULL; | |
dd5c8af1 JS |
324 | retval = get_relative_cwd(buffer, sizeof(buffer) - 1, |
325 | get_git_work_tree()); | |
326 | if (!retval || !*retval) | |
327 | return NULL; | |
328 | set_git_dir(make_absolute_path(gitdirenv)); | |
329 | if (chdir(work_tree_env) < 0) | |
0721c314 | 330 | die_errno ("Could not chdir to '%s'", work_tree_env); |
dd5c8af1 JS |
331 | strcat(buffer, "/"); |
332 | return retval; | |
892c41b9 | 333 | } |
3a3c3fc4 | 334 | if (nongit_ok) { |
41e95f69 ML |
335 | *nongit_ok = 1; |
336 | return NULL; | |
337 | } | |
ad1a382f | 338 | die("Not a git repository: '%s'", gitdirenv); |
5e7bfe25 | 339 | } |
d288a700 | 340 | |
f66a4d68 | 341 | if (!getcwd(cwd, sizeof(cwd)-1)) |
0721c314 | 342 | die_errno("Unable to read current working directory"); |
d288a700 | 343 | |
0454dd93 | 344 | ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs); |
17d778e7 JH |
345 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd)) |
346 | ceil_offset = 1; | |
d288a700 | 347 | |
892c41b9 | 348 | /* |
e90fdc39 | 349 | * Test in the following order (relative to the cwd): |
b44ebb19 | 350 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
351 | * - .git/ |
352 | * - ./ (bare) | |
b44ebb19 | 353 | * - ../.git |
e90fdc39 JS |
354 | * - ../.git/ |
355 | * - ../ (bare) | |
356 | * - ../../.git/ | |
357 | * etc. | |
892c41b9 | 358 | */ |
e90fdc39 JS |
359 | offset = len = strlen(cwd); |
360 | for (;;) { | |
b44ebb19 LH |
361 | gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT); |
362 | if (gitfile_dir) { | |
363 | if (set_git_dir(gitfile_dir)) | |
364 | die("Repository setup failed"); | |
365 | break; | |
366 | } | |
e90fdc39 JS |
367 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) |
368 | break; | |
369 | if (is_git_directory(".")) { | |
370 | inside_git_dir = 1; | |
371 | if (!work_tree_env) | |
372 | inside_work_tree = 0; | |
72183cb2 SG |
373 | if (offset != len) { |
374 | cwd[offset] = '\0'; | |
375 | setenv(GIT_DIR_ENVIRONMENT, cwd, 1); | |
376 | } else | |
377 | setenv(GIT_DIR_ENVIRONMENT, ".", 1); | |
9459aa77 | 378 | check_repository_format_gently(nongit_ok); |
892c41b9 ML |
379 | return NULL; |
380 | } | |
0454dd93 DR |
381 | while (--offset > ceil_offset && cwd[offset] != '/'); |
382 | if (offset <= ceil_offset) { | |
383 | if (nongit_ok) { | |
384 | if (chdir(cwd)) | |
0721c314 | 385 | die_errno("Cannot come back to cwd"); |
0454dd93 DR |
386 | *nongit_ok = 1; |
387 | return NULL; | |
e90fdc39 | 388 | } |
f66bc5f9 | 389 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); |
0454dd93 | 390 | } |
7be77de2 | 391 | if (chdir("..")) |
d824cbba | 392 | die_errno("Cannot change to '%s/..'", cwd); |
892c41b9 ML |
393 | } |
394 | ||
e90fdc39 JS |
395 | inside_git_dir = 0; |
396 | if (!work_tree_env) | |
397 | inside_work_tree = 1; | |
398 | git_work_tree_cfg = xstrndup(cwd, offset); | |
9459aa77 NTND |
399 | if (check_repository_format_gently(nongit_ok)) |
400 | return NULL; | |
e90fdc39 | 401 | if (offset == len) |
d288a700 LT |
402 | return NULL; |
403 | ||
e90fdc39 JS |
404 | /* Make "offset" point to past the '/', and add a '/' at the end */ |
405 | offset++; | |
406 | cwd[len++] = '/'; | |
407 | cwd[len] = 0; | |
408 | return cwd + offset; | |
d288a700 | 409 | } |
5e7bfe25 | 410 | |
94df2506 JH |
411 | int git_config_perm(const char *var, const char *value) |
412 | { | |
06cbe855 HO |
413 | int i; |
414 | char *endptr; | |
415 | ||
416 | if (value == NULL) | |
417 | return PERM_GROUP; | |
418 | ||
419 | if (!strcmp(value, "umask")) | |
420 | return PERM_UMASK; | |
421 | if (!strcmp(value, "group")) | |
422 | return PERM_GROUP; | |
423 | if (!strcmp(value, "all") || | |
424 | !strcmp(value, "world") || | |
425 | !strcmp(value, "everybody")) | |
426 | return PERM_EVERYBODY; | |
427 | ||
428 | /* Parse octal numbers */ | |
429 | i = strtol(value, &endptr, 8); | |
430 | ||
431 | /* If not an octal number, maybe true/false? */ | |
432 | if (*endptr != 0) | |
433 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
434 | ||
435 | /* | |
436 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 437 | * a chmod value to restrict to. |
06cbe855 HO |
438 | */ |
439 | switch (i) { | |
440 | case PERM_UMASK: /* 0 */ | |
441 | return PERM_UMASK; | |
442 | case OLD_PERM_GROUP: /* 1 */ | |
443 | return PERM_GROUP; | |
444 | case OLD_PERM_EVERYBODY: /* 2 */ | |
445 | return PERM_EVERYBODY; | |
94df2506 | 446 | } |
06cbe855 HO |
447 | |
448 | /* A filemode value was given: 0xxx */ | |
449 | ||
450 | if ((i & 0600) != 0600) | |
451 | die("Problem with core.sharedRepository filemode value " | |
452 | "(0%.3o).\nThe owner of files must always have " | |
453 | "read and write permissions.", i); | |
454 | ||
455 | /* | |
456 | * Mask filemode value. Others can not get write permission. | |
457 | * x flags for directories are handled separately. | |
458 | */ | |
5a688fe4 | 459 | return -(i & 0666); |
94df2506 JH |
460 | } |
461 | ||
ef90d6d4 | 462 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 463 | { |
299726d5 JS |
464 | if (strcmp(var, "core.repositoryformatversion") == 0) |
465 | repository_format_version = git_config_int(var, value); | |
457f06d6 | 466 | else if (strcmp(var, "core.sharedrepository") == 0) |
94df2506 | 467 | shared_repository = git_config_perm(var, value); |
e90fdc39 JS |
468 | else if (strcmp(var, "core.bare") == 0) { |
469 | is_bare_repository_cfg = git_config_bool(var, value); | |
470 | if (is_bare_repository_cfg == 1) | |
471 | inside_work_tree = -1; | |
472 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
473 | if (!value) |
474 | return config_error_nonbool(var); | |
8e0f7003 | 475 | free(git_work_tree_cfg); |
e90fdc39 JS |
476 | git_work_tree_cfg = xstrdup(value); |
477 | inside_work_tree = -1; | |
478 | } | |
299726d5 | 479 | return 0; |
ab9cb76f JH |
480 | } |
481 | ||
482 | int check_repository_format(void) | |
483 | { | |
9459aa77 | 484 | return check_repository_format_gently(NULL); |
ab9cb76f JH |
485 | } |
486 | ||
5e7bfe25 JH |
487 | const char *setup_git_directory(void) |
488 | { | |
4ca06608 | 489 | const char *retval = setup_git_directory_gently(NULL); |
e90fdc39 JS |
490 | |
491 | /* If the work tree is not the default one, recompute prefix */ | |
492 | if (inside_work_tree < 0) { | |
493 | static char buffer[PATH_MAX + 1]; | |
494 | char *rel; | |
495 | if (retval && chdir(retval)) | |
0721c314 | 496 | die_errno ("Could not jump back into original cwd"); |
e90fdc39 | 497 | rel = get_relative_cwd(buffer, PATH_MAX, get_git_work_tree()); |
bb528633 | 498 | if (rel && *rel && chdir(get_git_work_tree())) |
0721c314 | 499 | die_errno ("Could not jump to working directory"); |
e90fdc39 JS |
500 | return rel && *rel ? strcat(rel, "/") : NULL; |
501 | } | |
502 | ||
5e7bfe25 JH |
503 | return retval; |
504 | } |