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Commit | Line | Data |
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8bc9a0c7 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
e83c5163 | 6 | #include "cache.h" |
c3c8835f | 7 | #include "builtin.h" |
a47d1813 | 8 | #include "exec_cmd.h" |
596f91ee | 9 | #include "parse-options.h" |
e83c5163 | 10 | |
d3af621b | 11 | #ifndef DEFAULT_GIT_TEMPLATE_DIR |
d52fd42a | 12 | #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates" |
d3af621b JH |
13 | #endif |
14 | ||
c869753e SP |
15 | #ifdef NO_TRUSTABLE_FILEMODE |
16 | #define TEST_FILEMODE 0 | |
17 | #else | |
18 | #define TEST_FILEMODE 1 | |
19 | #endif | |
20 | ||
0a2c7eea DM |
21 | static int init_is_bare_repository = 0; |
22 | static int init_shared_repository = -1; | |
23 | ||
af6e277c | 24 | static void safe_create_dir(const char *dir, int share) |
cb126d8d | 25 | { |
f312de01 | 26 | if (mkdir(dir, 0777) < 0) { |
cb126d8d ZW |
27 | if (errno != EEXIST) { |
28 | perror(dir); | |
29 | exit(1); | |
30 | } | |
31 | } | |
af6e277c | 32 | else if (share && adjust_shared_perm(dir)) |
d7530708 | 33 | die("Could not make %s writable by group", dir); |
cb126d8d ZW |
34 | } |
35 | ||
8d5afef0 JH |
36 | static void copy_templates_1(char *path, int baselen, |
37 | char *template, int template_baselen, | |
38 | DIR *dir) | |
39 | { | |
40 | struct dirent *de; | |
41 | ||
42 | /* Note: if ".git/hooks" file exists in the repository being | |
43 | * re-initialized, /etc/core-git/templates/hooks/update would | |
f18d244a | 44 | * cause "git init" to fail here. I think this is sane but |
8d5afef0 JH |
45 | * it means that the set of templates we ship by default, along |
46 | * with the way the namespace under .git/ is organized, should | |
47 | * be really carefully chosen. | |
48 | */ | |
af6e277c | 49 | safe_create_dir(path, 1); |
8d5afef0 JH |
50 | while ((de = readdir(dir)) != NULL) { |
51 | struct stat st_git, st_template; | |
52 | int namelen; | |
53 | int exists = 0; | |
54 | ||
55 | if (de->d_name[0] == '.') | |
56 | continue; | |
57 | namelen = strlen(de->d_name); | |
58 | if ((PATH_MAX <= baselen + namelen) || | |
59 | (PATH_MAX <= template_baselen + namelen)) | |
60 | die("insanely long template name %s", de->d_name); | |
61 | memcpy(path + baselen, de->d_name, namelen+1); | |
62 | memcpy(template + template_baselen, de->d_name, namelen+1); | |
63 | if (lstat(path, &st_git)) { | |
64 | if (errno != ENOENT) | |
0721c314 | 65 | die_errno("cannot stat '%s'", path); |
8d5afef0 JH |
66 | } |
67 | else | |
68 | exists = 1; | |
69 | ||
70 | if (lstat(template, &st_template)) | |
0721c314 | 71 | die_errno("cannot stat template '%s'", template); |
8d5afef0 JH |
72 | |
73 | if (S_ISDIR(st_template.st_mode)) { | |
74 | DIR *subdir = opendir(template); | |
75 | int baselen_sub = baselen + namelen; | |
76 | int template_baselen_sub = template_baselen + namelen; | |
77 | if (!subdir) | |
0721c314 | 78 | die_errno("cannot opendir '%s'", template); |
8d5afef0 JH |
79 | path[baselen_sub++] = |
80 | template[template_baselen_sub++] = '/'; | |
81 | path[baselen_sub] = | |
82 | template[template_baselen_sub] = 0; | |
83 | copy_templates_1(path, baselen_sub, | |
84 | template, template_baselen_sub, | |
85 | subdir); | |
86 | closedir(subdir); | |
87 | } | |
88 | else if (exists) | |
89 | continue; | |
90 | else if (S_ISLNK(st_template.st_mode)) { | |
91 | char lnk[256]; | |
92 | int len; | |
93 | len = readlink(template, lnk, sizeof(lnk)); | |
94 | if (len < 0) | |
0721c314 | 95 | die_errno("cannot readlink '%s'", template); |
8d5afef0 JH |
96 | if (sizeof(lnk) <= len) |
97 | die("insanely long symlink %s", template); | |
98 | lnk[len] = 0; | |
99 | if (symlink(lnk, path)) | |
0721c314 | 100 | die_errno("cannot symlink '%s' '%s'", lnk, path); |
8d5afef0 JH |
101 | } |
102 | else if (S_ISREG(st_template.st_mode)) { | |
103 | if (copy_file(path, template, st_template.st_mode)) | |
0721c314 TR |
104 | die_errno("cannot copy '%s' to '%s'", template, |
105 | path); | |
8d5afef0 JH |
106 | } |
107 | else | |
108 | error("ignoring template %s", template); | |
109 | } | |
110 | } | |
111 | ||
f225aeb2 | 112 | static void copy_templates(const char *template_dir) |
8d5afef0 JH |
113 | { |
114 | char path[PATH_MAX]; | |
115 | char template_path[PATH_MAX]; | |
d3af621b | 116 | int template_len; |
8d5afef0 | 117 | DIR *dir; |
f225aeb2 DB |
118 | const char *git_dir = get_git_dir(); |
119 | int len = strlen(git_dir); | |
8d5afef0 | 120 | |
a47d1813 | 121 | if (!template_dir) |
d4ebc36c | 122 | template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT); |
2de9de5e SP |
123 | if (!template_dir) |
124 | template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR); | |
172035f0 JK |
125 | if (!template_dir[0]) |
126 | return; | |
32d1776b FL |
127 | template_len = strlen(template_dir); |
128 | if (PATH_MAX <= (template_len+strlen("/config"))) | |
129 | die("insanely long template path %s", template_dir); | |
8d5afef0 | 130 | strcpy(template_path, template_dir); |
8d5afef0 JH |
131 | if (template_path[template_len-1] != '/') { |
132 | template_path[template_len++] = '/'; | |
133 | template_path[template_len] = 0; | |
134 | } | |
8d5afef0 | 135 | dir = opendir(template_path); |
d3af621b | 136 | if (!dir) { |
2fd8c0a5 | 137 | warning("templates not found %s", template_dir); |
8d5afef0 | 138 | return; |
d3af621b JH |
139 | } |
140 | ||
4f629539 JH |
141 | /* Make sure that template is from the correct vintage */ |
142 | strcpy(template_path + template_len, "config"); | |
143 | repository_format_version = 0; | |
144 | git_config_from_file(check_repository_format_version, | |
ef90d6d4 | 145 | template_path, NULL); |
4f629539 JH |
146 | template_path[template_len] = 0; |
147 | ||
148 | if (repository_format_version && | |
149 | repository_format_version != GIT_REPO_VERSION) { | |
2fd8c0a5 MV |
150 | warning("not copying templates of " |
151 | "a wrong format version %d from '%s'", | |
4f629539 JH |
152 | repository_format_version, |
153 | template_dir); | |
154 | closedir(dir); | |
155 | return; | |
156 | } | |
157 | ||
d3af621b | 158 | memcpy(path, git_dir, len); |
f225aeb2 DB |
159 | if (len && path[len - 1] != '/') |
160 | path[len++] = '/'; | |
1f961c19 | 161 | path[len] = 0; |
8d5afef0 JH |
162 | copy_templates_1(path, len, |
163 | template_path, template_len, | |
164 | dir); | |
165 | closedir(dir); | |
166 | } | |
167 | ||
f225aeb2 | 168 | static int create_default_files(const char *template_path) |
cad88fdf | 169 | { |
f225aeb2 | 170 | const char *git_dir = get_git_dir(); |
cad88fdf LT |
171 | unsigned len = strlen(git_dir); |
172 | static char path[PATH_MAX]; | |
4f629539 JH |
173 | struct stat st1; |
174 | char repo_version_string[10]; | |
5cc8f372 | 175 | char junk[2]; |
ef0a89a6 | 176 | int reinit; |
c869753e | 177 | int filemode; |
cad88fdf LT |
178 | |
179 | if (len > sizeof(path)-50) | |
180 | die("insane git directory %s", git_dir); | |
181 | memcpy(path, git_dir, len); | |
182 | ||
183 | if (len && path[len-1] != '/') | |
184 | path[len++] = '/'; | |
185 | ||
186 | /* | |
187 | * Create .git/refs/{heads,tags} | |
188 | */ | |
f225aeb2 DB |
189 | safe_create_dir(git_path("refs"), 1); |
190 | safe_create_dir(git_path("refs/heads"), 1); | |
191 | safe_create_dir(git_path("refs/tags"), 1); | |
cad88fdf | 192 | |
4f629539 JH |
193 | /* First copy the templates -- we might have the default |
194 | * config file there, in which case we would want to read | |
195 | * from it after installing. | |
196 | */ | |
f225aeb2 | 197 | copy_templates(template_path); |
4f629539 | 198 | |
ef90d6d4 | 199 | git_config(git_default_config, NULL); |
0a2c7eea | 200 | is_bare_repository_cfg = init_is_bare_repository; |
5a688fe4 JH |
201 | |
202 | /* reading existing config may have overwrote it */ | |
0a2c7eea DM |
203 | if (init_shared_repository != -1) |
204 | shared_repository = init_shared_repository; | |
4f629539 | 205 | |
138086a7 JH |
206 | /* |
207 | * We would have created the above under user's umask -- under | |
208 | * shared-repository settings, we would need to fix them up. | |
209 | */ | |
210 | if (shared_repository) { | |
f225aeb2 DB |
211 | adjust_shared_perm(get_git_dir()); |
212 | adjust_shared_perm(git_path("refs")); | |
213 | adjust_shared_perm(git_path("refs/heads")); | |
214 | adjust_shared_perm(git_path("refs/tags")); | |
138086a7 JH |
215 | } |
216 | ||
cad88fdf LT |
217 | /* |
218 | * Create the default symlink from ".git/HEAD" to the "master" | |
8098a178 | 219 | * branch, if it does not exist yet. |
cad88fdf LT |
220 | */ |
221 | strcpy(path + len, "HEAD"); | |
5cc8f372 JS |
222 | reinit = (!access(path, R_OK) |
223 | || readlink(path, junk, sizeof(junk)-1) != -1); | |
ef0a89a6 | 224 | if (!reinit) { |
8b5157e4 | 225 | if (create_symref("HEAD", "refs/heads/master", NULL) < 0) |
cad88fdf | 226 | exit(1); |
cad88fdf | 227 | } |
e24317b4 | 228 | |
4f629539 JH |
229 | /* This forces creation of new config file */ |
230 | sprintf(repo_version_string, "%d", GIT_REPO_VERSION); | |
231 | git_config_set("core.repositoryformatversion", repo_version_string); | |
232 | ||
233 | path[len] = 0; | |
e24317b4 | 234 | strcpy(path + len, "config"); |
4f629539 JH |
235 | |
236 | /* Check filemode trustability */ | |
c869753e SP |
237 | filemode = TEST_FILEMODE; |
238 | if (TEST_FILEMODE && !lstat(path, &st1)) { | |
4f629539 | 239 | struct stat st2; |
c869753e | 240 | filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) && |
4f629539 JH |
241 | !lstat(path, &st2) && |
242 | st1.st_mode != st2.st_mode); | |
e24317b4 | 243 | } |
c869753e | 244 | git_config_set("core.filemode", filemode ? "true" : "false"); |
ef0a89a6 | 245 | |
e90fdc39 | 246 | if (is_bare_repository()) |
7d1864ce | 247 | git_config_set("core.bare", "true"); |
7d1864ce | 248 | else { |
e90fdc39 | 249 | const char *work_tree = get_git_work_tree(); |
7d1864ce | 250 | git_config_set("core.bare", "false"); |
196055c2 AR |
251 | /* allow template config file to override the default */ |
252 | if (log_all_ref_updates == -1) | |
253 | git_config_set("core.logallrefupdates", "true"); | |
f225aeb2 DB |
254 | if (prefixcmp(git_dir, work_tree) || |
255 | strcmp(git_dir + strlen(work_tree), "/.git")) { | |
e90fdc39 | 256 | git_config_set("core.worktree", work_tree); |
f225aeb2 | 257 | } |
7d1864ce | 258 | } |
75d24499 | 259 | |
75d24499 | 260 | if (!reinit) { |
2455406a | 261 | /* Check if symlink is supported in the work tree */ |
75d24499 JH |
262 | path[len] = 0; |
263 | strcpy(path + len, "tXXXXXX"); | |
264 | if (!close(xmkstemp(path)) && | |
265 | !unlink(path) && | |
266 | !symlink("testing", path) && | |
267 | !lstat(path, &st1) && | |
268 | S_ISLNK(st1.st_mode)) | |
269 | unlink(path); /* good */ | |
270 | else | |
271 | git_config_set("core.symlinks", "false"); | |
2455406a DP |
272 | |
273 | /* Check if the filesystem is case-insensitive */ | |
274 | path[len] = 0; | |
275 | strcpy(path + len, "CoNfIg"); | |
276 | if (!access(path, F_OK)) | |
277 | git_config_set("core.ignorecase", "true"); | |
75d24499 JH |
278 | } |
279 | ||
ef0a89a6 | 280 | return reinit; |
cad88fdf LT |
281 | } |
282 | ||
f225aeb2 DB |
283 | int init_db(const char *template_dir, unsigned int flags) |
284 | { | |
285 | const char *sha1_dir; | |
286 | char *path; | |
287 | int len, reinit; | |
288 | ||
289 | safe_create_dir(get_git_dir(), 0); | |
290 | ||
0a2c7eea DM |
291 | init_is_bare_repository = is_bare_repository(); |
292 | ||
f225aeb2 DB |
293 | /* Check to see if the repository version is right. |
294 | * Note that a newly created repository does not have | |
295 | * config file, so this will not fail. What we are catching | |
296 | * is an attempt to reinitialize new repository with an old tool. | |
297 | */ | |
298 | check_repository_format(); | |
299 | ||
300 | reinit = create_default_files(template_dir); | |
301 | ||
302 | sha1_dir = get_object_directory(); | |
303 | len = strlen(sha1_dir); | |
304 | path = xmalloc(len + 40); | |
305 | memcpy(path, sha1_dir, len); | |
306 | ||
307 | safe_create_dir(sha1_dir, 1); | |
308 | strcpy(path+len, "/pack"); | |
309 | safe_create_dir(path, 1); | |
310 | strcpy(path+len, "/info"); | |
311 | safe_create_dir(path, 1); | |
312 | ||
313 | if (shared_repository) { | |
314 | char buf[10]; | |
315 | /* We do not spell "group" and such, so that | |
316 | * the configuration can be read by older version | |
317 | * of git. Note, we use octal numbers for new share modes, | |
318 | * and compatibility values for PERM_GROUP and | |
319 | * PERM_EVERYBODY. | |
320 | */ | |
5a688fe4 JH |
321 | if (shared_repository < 0) |
322 | /* force to the mode value */ | |
323 | sprintf(buf, "0%o", -shared_repository); | |
324 | else if (shared_repository == PERM_GROUP) | |
f225aeb2 DB |
325 | sprintf(buf, "%d", OLD_PERM_GROUP); |
326 | else if (shared_repository == PERM_EVERYBODY) | |
327 | sprintf(buf, "%d", OLD_PERM_EVERYBODY); | |
328 | else | |
5a688fe4 | 329 | die("oops"); |
f225aeb2 DB |
330 | git_config_set("core.sharedrepository", buf); |
331 | git_config_set("receive.denyNonFastforwards", "true"); | |
332 | } | |
333 | ||
334 | if (!(flags & INIT_DB_QUIET)) | |
335 | printf("%s%s Git repository in %s/\n", | |
336 | reinit ? "Reinitialized existing" : "Initialized empty", | |
337 | shared_repository ? " shared" : "", | |
338 | get_git_dir()); | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | static int guess_repository_type(const char *git_dir) | |
6adcca3f JH |
344 | { |
345 | char cwd[PATH_MAX]; | |
346 | const char *slash; | |
347 | ||
6adcca3f JH |
348 | /* |
349 | * "GIT_DIR=. git init" is always bare. | |
350 | * "GIT_DIR=`pwd` git init" too. | |
351 | */ | |
352 | if (!strcmp(".", git_dir)) | |
f225aeb2 | 353 | return 1; |
6adcca3f | 354 | if (!getcwd(cwd, sizeof(cwd))) |
0721c314 | 355 | die_errno("cannot tell cwd"); |
6adcca3f | 356 | if (!strcmp(git_dir, cwd)) |
f225aeb2 | 357 | return 1; |
6adcca3f JH |
358 | /* |
359 | * "GIT_DIR=.git or GIT_DIR=something/.git is usually not. | |
360 | */ | |
361 | if (!strcmp(git_dir, ".git")) | |
f225aeb2 | 362 | return 0; |
6adcca3f JH |
363 | slash = strrchr(git_dir, '/'); |
364 | if (slash && !strcmp(slash, "/.git")) | |
f225aeb2 | 365 | return 0; |
6adcca3f JH |
366 | |
367 | /* | |
368 | * Otherwise it is often bare. At this point | |
369 | * we are just guessing. | |
370 | */ | |
f225aeb2 | 371 | return 1; |
6adcca3f JH |
372 | } |
373 | ||
596f91ee MK |
374 | static int shared_callback(const struct option *opt, const char *arg, int unset) |
375 | { | |
376 | *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP; | |
377 | return 0; | |
378 | } | |
379 | ||
380 | static const char *const init_db_usage[] = { | |
0397ff24 | 381 | "git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [directory]", |
596f91ee MK |
382 | NULL |
383 | }; | |
d3af621b | 384 | |
4696cb93 ZW |
385 | /* |
386 | * If you want to, you can share the DB area with any number of branches. | |
387 | * That has advantages: you can save space by sharing all the SHA1 objects. | |
388 | * On the other hand, it might just make lookup slower and messier. You | |
389 | * be the judge. The default case is to have one DB per managed directory. | |
390 | */ | |
a633fca0 | 391 | int cmd_init_db(int argc, const char **argv, const char *prefix) |
e83c5163 | 392 | { |
cad88fdf | 393 | const char *git_dir; |
c3c8835f | 394 | const char *template_dir = NULL; |
f225aeb2 | 395 | unsigned int flags = 0; |
596f91ee MK |
396 | const struct option init_db_options[] = { |
397 | OPT_STRING(0, "template", &template_dir, "template-directory", | |
398 | "provide the directory from which templates will be used"), | |
399 | OPT_SET_INT(0, "bare", &is_bare_repository_cfg, | |
400 | "create a bare repository", 1), | |
401 | { OPTION_CALLBACK, 0, "shared", &init_shared_repository, | |
402 | "permissions", | |
403 | "specify that the git repository is to be shared amongst several users", | |
404 | PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0}, | |
405 | OPT_BIT('q', "quiet", &flags, "be quiet", INIT_DB_QUIET), | |
406 | OPT_END() | |
407 | }; | |
408 | ||
0397ff24 JH |
409 | argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0); |
410 | ||
411 | if (argc == 1) { | |
53d48885 NS |
412 | int mkdir_tried = 0; |
413 | retry: | |
0397ff24 | 414 | if (chdir(argv[0]) < 0) { |
53d48885 NS |
415 | if (!mkdir_tried) { |
416 | int saved; | |
417 | /* | |
418 | * At this point we haven't read any configuration, | |
419 | * and we know shared_repository should always be 0; | |
420 | * but just in case we play safe. | |
421 | */ | |
422 | saved = shared_repository; | |
423 | shared_repository = 0; | |
0397ff24 | 424 | switch (safe_create_leading_directories_const(argv[0])) { |
53d48885 NS |
425 | case -3: |
426 | errno = EEXIST; | |
427 | /* fallthru */ | |
428 | case -1: | |
0397ff24 | 429 | die_errno("cannot mkdir %s", argv[0]); |
53d48885 NS |
430 | break; |
431 | default: | |
432 | break; | |
433 | } | |
434 | shared_repository = saved; | |
0397ff24 JH |
435 | if (mkdir(argv[0], 0777) < 0) |
436 | die_errno("cannot mkdir %s", argv[0]); | |
53d48885 NS |
437 | mkdir_tried = 1; |
438 | goto retry; | |
439 | } | |
0397ff24 | 440 | die_errno("cannot chdir to %s", argv[0]); |
53d48885 | 441 | } |
0397ff24 JH |
442 | } else if (0 < argc) { |
443 | usage(init_db_usage[0]); | |
d3af621b | 444 | } |
0397ff24 | 445 | if (is_bare_repository_cfg == 1) { |
596f91ee | 446 | static char git_dir[PATH_MAX+1]; |
d3af621b | 447 | |
53d48885 NS |
448 | setenv(GIT_DIR_ENVIRONMENT, |
449 | getcwd(git_dir, sizeof(git_dir)), 0); | |
d3af621b JH |
450 | } |
451 | ||
5a688fe4 JH |
452 | if (init_shared_repository != -1) |
453 | shared_repository = init_shared_repository; | |
454 | ||
6adcca3f JH |
455 | /* |
456 | * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR | |
457 | * without --bare. Catch the error early. | |
458 | */ | |
459 | git_dir = getenv(GIT_DIR_ENVIRONMENT); | |
460 | if ((!git_dir || is_bare_repository_cfg == 1) | |
461 | && getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
462 | die("%s (or --work-tree=<directory>) not allowed without " | |
463 | "specifying %s (or --git-dir=<directory>)", | |
464 | GIT_WORK_TREE_ENVIRONMENT, | |
465 | GIT_DIR_ENVIRONMENT); | |
466 | ||
cad88fdf LT |
467 | /* |
468 | * Set up the default .git directory contents | |
469 | */ | |
ef0a89a6 | 470 | if (!git_dir) |
cad88fdf | 471 | git_dir = DEFAULT_GIT_DIR_ENVIRONMENT; |
af6e277c | 472 | |
f225aeb2 DB |
473 | if (is_bare_repository_cfg < 0) |
474 | is_bare_repository_cfg = guess_repository_type(git_dir); | |
475 | ||
476 | if (!is_bare_repository_cfg) { | |
477 | if (git_dir) { | |
478 | const char *git_dir_parent = strrchr(git_dir, '/'); | |
479 | if (git_dir_parent) { | |
480 | char *rel = xstrndup(git_dir, git_dir_parent - git_dir); | |
481 | git_work_tree_cfg = xstrdup(make_absolute_path(rel)); | |
482 | free(rel); | |
483 | } | |
484 | } | |
485 | if (!git_work_tree_cfg) { | |
486 | git_work_tree_cfg = xcalloc(PATH_MAX, 1); | |
487 | if (!getcwd(git_work_tree_cfg, PATH_MAX)) | |
0721c314 | 488 | die_errno ("Cannot access current working directory"); |
f225aeb2 DB |
489 | } |
490 | if (access(get_git_work_tree(), X_OK)) | |
0721c314 TR |
491 | die_errno ("Cannot access work tree '%s'", |
492 | get_git_work_tree()); | |
94df2506 | 493 | } |
af6e277c | 494 | |
f225aeb2 | 495 | set_git_dir(make_absolute_path(git_dir)); |
ef0a89a6 | 496 | |
f225aeb2 | 497 | return init_db(template_dir, flags); |
e83c5163 | 498 | } |