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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" |
e83c5163 | 9 | |
d3af621b | 10 | #ifndef DEFAULT_GIT_TEMPLATE_DIR |
d52fd42a | 11 | #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates" |
d3af621b JH |
12 | #endif |
13 | ||
c869753e SP |
14 | #ifdef NO_TRUSTABLE_FILEMODE |
15 | #define TEST_FILEMODE 0 | |
16 | #else | |
17 | #define TEST_FILEMODE 1 | |
18 | #endif | |
19 | ||
af6e277c | 20 | static void safe_create_dir(const char *dir, int share) |
cb126d8d | 21 | { |
f312de01 | 22 | if (mkdir(dir, 0777) < 0) { |
cb126d8d ZW |
23 | if (errno != EEXIST) { |
24 | perror(dir); | |
25 | exit(1); | |
26 | } | |
27 | } | |
af6e277c JS |
28 | else if (share && adjust_shared_perm(dir)) |
29 | die("Could not make %s writable by group\n", dir); | |
cb126d8d ZW |
30 | } |
31 | ||
8d5afef0 JH |
32 | static void copy_templates_1(char *path, int baselen, |
33 | char *template, int template_baselen, | |
34 | DIR *dir) | |
35 | { | |
36 | struct dirent *de; | |
37 | ||
38 | /* Note: if ".git/hooks" file exists in the repository being | |
39 | * re-initialized, /etc/core-git/templates/hooks/update would | |
5c94f87e | 40 | * cause git-init to fail here. I think this is sane but |
8d5afef0 JH |
41 | * it means that the set of templates we ship by default, along |
42 | * with the way the namespace under .git/ is organized, should | |
43 | * be really carefully chosen. | |
44 | */ | |
af6e277c | 45 | safe_create_dir(path, 1); |
8d5afef0 JH |
46 | while ((de = readdir(dir)) != NULL) { |
47 | struct stat st_git, st_template; | |
48 | int namelen; | |
49 | int exists = 0; | |
50 | ||
51 | if (de->d_name[0] == '.') | |
52 | continue; | |
53 | namelen = strlen(de->d_name); | |
54 | if ((PATH_MAX <= baselen + namelen) || | |
55 | (PATH_MAX <= template_baselen + namelen)) | |
56 | die("insanely long template name %s", de->d_name); | |
57 | memcpy(path + baselen, de->d_name, namelen+1); | |
58 | memcpy(template + template_baselen, de->d_name, namelen+1); | |
59 | if (lstat(path, &st_git)) { | |
60 | if (errno != ENOENT) | |
61 | die("cannot stat %s", path); | |
62 | } | |
63 | else | |
64 | exists = 1; | |
65 | ||
66 | if (lstat(template, &st_template)) | |
67 | die("cannot stat template %s", template); | |
68 | ||
69 | if (S_ISDIR(st_template.st_mode)) { | |
70 | DIR *subdir = opendir(template); | |
71 | int baselen_sub = baselen + namelen; | |
72 | int template_baselen_sub = template_baselen + namelen; | |
73 | if (!subdir) | |
74 | die("cannot opendir %s", template); | |
75 | path[baselen_sub++] = | |
76 | template[template_baselen_sub++] = '/'; | |
77 | path[baselen_sub] = | |
78 | template[template_baselen_sub] = 0; | |
79 | copy_templates_1(path, baselen_sub, | |
80 | template, template_baselen_sub, | |
81 | subdir); | |
82 | closedir(subdir); | |
83 | } | |
84 | else if (exists) | |
85 | continue; | |
86 | else if (S_ISLNK(st_template.st_mode)) { | |
87 | char lnk[256]; | |
88 | int len; | |
89 | len = readlink(template, lnk, sizeof(lnk)); | |
90 | if (len < 0) | |
91 | die("cannot readlink %s", template); | |
92 | if (sizeof(lnk) <= len) | |
93 | die("insanely long symlink %s", template); | |
94 | lnk[len] = 0; | |
95 | if (symlink(lnk, path)) | |
96 | die("cannot symlink %s %s", lnk, path); | |
97 | } | |
98 | else if (S_ISREG(st_template.st_mode)) { | |
99 | if (copy_file(path, template, st_template.st_mode)) | |
100 | die("cannot copy %s to %s", template, path); | |
101 | } | |
102 | else | |
103 | error("ignoring template %s", template); | |
104 | } | |
105 | } | |
106 | ||
f225aeb2 | 107 | static void copy_templates(const char *template_dir) |
8d5afef0 JH |
108 | { |
109 | char path[PATH_MAX]; | |
110 | char template_path[PATH_MAX]; | |
d3af621b | 111 | int template_len; |
8d5afef0 | 112 | DIR *dir; |
f225aeb2 DB |
113 | const char *git_dir = get_git_dir(); |
114 | int len = strlen(git_dir); | |
8d5afef0 | 115 | |
a47d1813 | 116 | if (!template_dir) |
d4ebc36c | 117 | template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT); |
2de9de5e SP |
118 | if (!template_dir) |
119 | template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR); | |
172035f0 JK |
120 | if (!template_dir[0]) |
121 | return; | |
8d5afef0 JH |
122 | strcpy(template_path, template_dir); |
123 | template_len = strlen(template_path); | |
124 | if (template_path[template_len-1] != '/') { | |
125 | template_path[template_len++] = '/'; | |
126 | template_path[template_len] = 0; | |
127 | } | |
8d5afef0 | 128 | dir = opendir(template_path); |
d3af621b JH |
129 | if (!dir) { |
130 | fprintf(stderr, "warning: templates not found %s\n", | |
131 | template_dir); | |
8d5afef0 | 132 | return; |
d3af621b JH |
133 | } |
134 | ||
4f629539 JH |
135 | /* Make sure that template is from the correct vintage */ |
136 | strcpy(template_path + template_len, "config"); | |
137 | repository_format_version = 0; | |
138 | git_config_from_file(check_repository_format_version, | |
ef90d6d4 | 139 | template_path, NULL); |
4f629539 JH |
140 | template_path[template_len] = 0; |
141 | ||
142 | if (repository_format_version && | |
143 | repository_format_version != GIT_REPO_VERSION) { | |
144 | fprintf(stderr, "warning: not copying templates of " | |
145 | "a wrong format version %d from '%s'\n", | |
146 | repository_format_version, | |
147 | template_dir); | |
148 | closedir(dir); | |
149 | return; | |
150 | } | |
151 | ||
d3af621b | 152 | memcpy(path, git_dir, len); |
f225aeb2 DB |
153 | if (len && path[len - 1] != '/') |
154 | path[len++] = '/'; | |
1f961c19 | 155 | path[len] = 0; |
8d5afef0 JH |
156 | copy_templates_1(path, len, |
157 | template_path, template_len, | |
158 | dir); | |
159 | closedir(dir); | |
160 | } | |
161 | ||
f225aeb2 | 162 | static int create_default_files(const char *template_path) |
cad88fdf | 163 | { |
f225aeb2 | 164 | const char *git_dir = get_git_dir(); |
cad88fdf LT |
165 | unsigned len = strlen(git_dir); |
166 | static char path[PATH_MAX]; | |
4f629539 JH |
167 | struct stat st1; |
168 | char repo_version_string[10]; | |
5cc8f372 | 169 | char junk[2]; |
ef0a89a6 | 170 | int reinit; |
c869753e | 171 | int filemode; |
cad88fdf LT |
172 | |
173 | if (len > sizeof(path)-50) | |
174 | die("insane git directory %s", git_dir); | |
175 | memcpy(path, git_dir, len); | |
176 | ||
177 | if (len && path[len-1] != '/') | |
178 | path[len++] = '/'; | |
179 | ||
180 | /* | |
181 | * Create .git/refs/{heads,tags} | |
182 | */ | |
f225aeb2 DB |
183 | safe_create_dir(git_path("refs"), 1); |
184 | safe_create_dir(git_path("refs/heads"), 1); | |
185 | safe_create_dir(git_path("refs/tags"), 1); | |
cad88fdf | 186 | |
4f629539 JH |
187 | /* First copy the templates -- we might have the default |
188 | * config file there, in which case we would want to read | |
189 | * from it after installing. | |
190 | */ | |
f225aeb2 | 191 | copy_templates(template_path); |
4f629539 | 192 | |
ef90d6d4 | 193 | git_config(git_default_config, NULL); |
4f629539 | 194 | |
138086a7 JH |
195 | /* |
196 | * We would have created the above under user's umask -- under | |
197 | * shared-repository settings, we would need to fix them up. | |
198 | */ | |
199 | if (shared_repository) { | |
f225aeb2 DB |
200 | adjust_shared_perm(get_git_dir()); |
201 | adjust_shared_perm(git_path("refs")); | |
202 | adjust_shared_perm(git_path("refs/heads")); | |
203 | adjust_shared_perm(git_path("refs/tags")); | |
138086a7 JH |
204 | } |
205 | ||
cad88fdf LT |
206 | /* |
207 | * Create the default symlink from ".git/HEAD" to the "master" | |
8098a178 | 208 | * branch, if it does not exist yet. |
cad88fdf LT |
209 | */ |
210 | strcpy(path + len, "HEAD"); | |
5cc8f372 JS |
211 | reinit = (!access(path, R_OK) |
212 | || readlink(path, junk, sizeof(junk)-1) != -1); | |
ef0a89a6 | 213 | if (!reinit) { |
8b5157e4 | 214 | if (create_symref("HEAD", "refs/heads/master", NULL) < 0) |
cad88fdf | 215 | exit(1); |
cad88fdf | 216 | } |
e24317b4 | 217 | |
4f629539 JH |
218 | /* This forces creation of new config file */ |
219 | sprintf(repo_version_string, "%d", GIT_REPO_VERSION); | |
220 | git_config_set("core.repositoryformatversion", repo_version_string); | |
221 | ||
222 | path[len] = 0; | |
e24317b4 | 223 | strcpy(path + len, "config"); |
4f629539 JH |
224 | |
225 | /* Check filemode trustability */ | |
c869753e SP |
226 | filemode = TEST_FILEMODE; |
227 | if (TEST_FILEMODE && !lstat(path, &st1)) { | |
4f629539 | 228 | struct stat st2; |
c869753e | 229 | filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) && |
4f629539 JH |
230 | !lstat(path, &st2) && |
231 | st1.st_mode != st2.st_mode); | |
e24317b4 | 232 | } |
c869753e | 233 | git_config_set("core.filemode", filemode ? "true" : "false"); |
ef0a89a6 | 234 | |
e90fdc39 | 235 | if (is_bare_repository()) |
7d1864ce | 236 | git_config_set("core.bare", "true"); |
7d1864ce | 237 | else { |
e90fdc39 | 238 | const char *work_tree = get_git_work_tree(); |
7d1864ce | 239 | git_config_set("core.bare", "false"); |
196055c2 AR |
240 | /* allow template config file to override the default */ |
241 | if (log_all_ref_updates == -1) | |
242 | git_config_set("core.logallrefupdates", "true"); | |
f225aeb2 DB |
243 | if (prefixcmp(git_dir, work_tree) || |
244 | strcmp(git_dir + strlen(work_tree), "/.git")) { | |
e90fdc39 | 245 | git_config_set("core.worktree", work_tree); |
f225aeb2 | 246 | } |
7d1864ce | 247 | } |
75d24499 | 248 | |
75d24499 | 249 | if (!reinit) { |
2455406a | 250 | /* Check if symlink is supported in the work tree */ |
75d24499 JH |
251 | path[len] = 0; |
252 | strcpy(path + len, "tXXXXXX"); | |
253 | if (!close(xmkstemp(path)) && | |
254 | !unlink(path) && | |
255 | !symlink("testing", path) && | |
256 | !lstat(path, &st1) && | |
257 | S_ISLNK(st1.st_mode)) | |
258 | unlink(path); /* good */ | |
259 | else | |
260 | git_config_set("core.symlinks", "false"); | |
2455406a DP |
261 | |
262 | /* Check if the filesystem is case-insensitive */ | |
263 | path[len] = 0; | |
264 | strcpy(path + len, "CoNfIg"); | |
265 | if (!access(path, F_OK)) | |
266 | git_config_set("core.ignorecase", "true"); | |
75d24499 JH |
267 | } |
268 | ||
ef0a89a6 | 269 | return reinit; |
cad88fdf LT |
270 | } |
271 | ||
f225aeb2 DB |
272 | int init_db(const char *template_dir, unsigned int flags) |
273 | { | |
274 | const char *sha1_dir; | |
275 | char *path; | |
276 | int len, reinit; | |
277 | ||
278 | safe_create_dir(get_git_dir(), 0); | |
279 | ||
280 | /* Check to see if the repository version is right. | |
281 | * Note that a newly created repository does not have | |
282 | * config file, so this will not fail. What we are catching | |
283 | * is an attempt to reinitialize new repository with an old tool. | |
284 | */ | |
285 | check_repository_format(); | |
286 | ||
287 | reinit = create_default_files(template_dir); | |
288 | ||
289 | sha1_dir = get_object_directory(); | |
290 | len = strlen(sha1_dir); | |
291 | path = xmalloc(len + 40); | |
292 | memcpy(path, sha1_dir, len); | |
293 | ||
294 | safe_create_dir(sha1_dir, 1); | |
295 | strcpy(path+len, "/pack"); | |
296 | safe_create_dir(path, 1); | |
297 | strcpy(path+len, "/info"); | |
298 | safe_create_dir(path, 1); | |
299 | ||
300 | if (shared_repository) { | |
301 | char buf[10]; | |
302 | /* We do not spell "group" and such, so that | |
303 | * the configuration can be read by older version | |
304 | * of git. Note, we use octal numbers for new share modes, | |
305 | * and compatibility values for PERM_GROUP and | |
306 | * PERM_EVERYBODY. | |
307 | */ | |
308 | if (shared_repository == PERM_GROUP) | |
309 | sprintf(buf, "%d", OLD_PERM_GROUP); | |
310 | else if (shared_repository == PERM_EVERYBODY) | |
311 | sprintf(buf, "%d", OLD_PERM_EVERYBODY); | |
312 | else | |
313 | sprintf(buf, "0%o", shared_repository); | |
314 | git_config_set("core.sharedrepository", buf); | |
315 | git_config_set("receive.denyNonFastforwards", "true"); | |
316 | } | |
317 | ||
318 | if (!(flags & INIT_DB_QUIET)) | |
319 | printf("%s%s Git repository in %s/\n", | |
320 | reinit ? "Reinitialized existing" : "Initialized empty", | |
321 | shared_repository ? " shared" : "", | |
322 | get_git_dir()); | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | static int guess_repository_type(const char *git_dir) | |
6adcca3f JH |
328 | { |
329 | char cwd[PATH_MAX]; | |
330 | const char *slash; | |
331 | ||
6adcca3f JH |
332 | /* |
333 | * "GIT_DIR=. git init" is always bare. | |
334 | * "GIT_DIR=`pwd` git init" too. | |
335 | */ | |
336 | if (!strcmp(".", git_dir)) | |
f225aeb2 | 337 | return 1; |
6adcca3f JH |
338 | if (!getcwd(cwd, sizeof(cwd))) |
339 | die("cannot tell cwd"); | |
340 | if (!strcmp(git_dir, cwd)) | |
f225aeb2 | 341 | return 1; |
6adcca3f JH |
342 | /* |
343 | * "GIT_DIR=.git or GIT_DIR=something/.git is usually not. | |
344 | */ | |
345 | if (!strcmp(git_dir, ".git")) | |
f225aeb2 | 346 | return 0; |
6adcca3f JH |
347 | slash = strrchr(git_dir, '/'); |
348 | if (slash && !strcmp(slash, "/.git")) | |
f225aeb2 | 349 | return 0; |
6adcca3f JH |
350 | |
351 | /* | |
352 | * Otherwise it is often bare. At this point | |
353 | * we are just guessing. | |
354 | */ | |
f225aeb2 | 355 | return 1; |
6adcca3f JH |
356 | } |
357 | ||
d3af621b | 358 | static const char init_db_usage[] = |
1b1dd23f | 359 | "git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]]"; |
d3af621b | 360 | |
4696cb93 ZW |
361 | /* |
362 | * If you want to, you can share the DB area with any number of branches. | |
363 | * That has advantages: you can save space by sharing all the SHA1 objects. | |
364 | * On the other hand, it might just make lookup slower and messier. You | |
365 | * be the judge. The default case is to have one DB per managed directory. | |
366 | */ | |
a633fca0 | 367 | int cmd_init_db(int argc, const char **argv, const char *prefix) |
e83c5163 | 368 | { |
cad88fdf | 369 | const char *git_dir; |
c3c8835f | 370 | const char *template_dir = NULL; |
f225aeb2 DB |
371 | unsigned int flags = 0; |
372 | int i; | |
e83c5163 | 373 | |
d3af621b | 374 | for (i = 1; i < argc; i++, argv++) { |
c3c8835f | 375 | const char *arg = argv[1]; |
cc44c765 | 376 | if (!prefixcmp(arg, "--template=")) |
d3af621b | 377 | template_dir = arg+11; |
74d3b23f LR |
378 | else if (!strcmp(arg, "--bare")) { |
379 | static char git_dir[PATH_MAX+1]; | |
380 | is_bare_repository_cfg = 1; | |
381 | setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, | |
382 | sizeof(git_dir)), 0); | |
383 | } else if (!strcmp(arg, "--shared")) | |
94df2506 | 384 | shared_repository = PERM_GROUP; |
cc44c765 | 385 | else if (!prefixcmp(arg, "--shared=")) |
94df2506 | 386 | shared_repository = git_config_perm("arg", arg+9); |
4576518d | 387 | else if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) |
f225aeb2 | 388 | flags |= INIT_DB_QUIET; |
d3af621b | 389 | else |
8cdf3364 | 390 | usage(init_db_usage); |
d3af621b JH |
391 | } |
392 | ||
6adcca3f JH |
393 | /* |
394 | * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR | |
395 | * without --bare. Catch the error early. | |
396 | */ | |
397 | git_dir = getenv(GIT_DIR_ENVIRONMENT); | |
398 | if ((!git_dir || is_bare_repository_cfg == 1) | |
399 | && getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
400 | die("%s (or --work-tree=<directory>) not allowed without " | |
401 | "specifying %s (or --git-dir=<directory>)", | |
402 | GIT_WORK_TREE_ENVIRONMENT, | |
403 | GIT_DIR_ENVIRONMENT); | |
404 | ||
cad88fdf LT |
405 | /* |
406 | * Set up the default .git directory contents | |
407 | */ | |
ef0a89a6 | 408 | if (!git_dir) |
cad88fdf | 409 | git_dir = DEFAULT_GIT_DIR_ENVIRONMENT; |
af6e277c | 410 | |
f225aeb2 DB |
411 | if (is_bare_repository_cfg < 0) |
412 | is_bare_repository_cfg = guess_repository_type(git_dir); | |
413 | ||
414 | if (!is_bare_repository_cfg) { | |
415 | if (git_dir) { | |
416 | const char *git_dir_parent = strrchr(git_dir, '/'); | |
417 | if (git_dir_parent) { | |
418 | char *rel = xstrndup(git_dir, git_dir_parent - git_dir); | |
419 | git_work_tree_cfg = xstrdup(make_absolute_path(rel)); | |
420 | free(rel); | |
421 | } | |
422 | } | |
423 | if (!git_work_tree_cfg) { | |
424 | git_work_tree_cfg = xcalloc(PATH_MAX, 1); | |
425 | if (!getcwd(git_work_tree_cfg, PATH_MAX)) | |
426 | die ("Cannot access current working directory."); | |
427 | } | |
428 | if (access(get_git_work_tree(), X_OK)) | |
429 | die ("Cannot access work tree '%s'", | |
430 | get_git_work_tree()); | |
94df2506 | 431 | } |
af6e277c | 432 | |
f225aeb2 | 433 | set_git_dir(make_absolute_path(git_dir)); |
ef0a89a6 | 434 | |
f225aeb2 | 435 | return init_db(template_dir, flags); |
e83c5163 | 436 | } |