/* * GIT - The information manager from hell * * Copyright (C) Linus Torvalds, 2005 */ #include "cache.h" #include "builtin.h" #include "exec_cmd.h" #include "parse-options.h" #ifndef DEFAULT_GIT_TEMPLATE_DIR #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates" #endif #ifdef NO_TRUSTABLE_FILEMODE #define TEST_FILEMODE 0 #else #define TEST_FILEMODE 1 #endif static int init_is_bare_repository = 0; static int init_shared_repository = -1; static void safe_create_dir(const char *dir, int share) { if (mkdir(dir, 0777) < 0) { if (errno != EEXIST) { perror(dir); exit(1); } } else if (share && adjust_shared_perm(dir)) die("Could not make %s writable by group", dir); } static void copy_templates_1(char *path, int baselen, char *template, int template_baselen, DIR *dir) { struct dirent *de; /* Note: if ".git/hooks" file exists in the repository being * re-initialized, /etc/core-git/templates/hooks/update would * cause "git init" to fail here. I think this is sane but * it means that the set of templates we ship by default, along * with the way the namespace under .git/ is organized, should * be really carefully chosen. */ safe_create_dir(path, 1); while ((de = readdir(dir)) != NULL) { struct stat st_git, st_template; int namelen; int exists = 0; if (de->d_name[0] == '.') continue; namelen = strlen(de->d_name); if ((PATH_MAX <= baselen + namelen) || (PATH_MAX <= template_baselen + namelen)) die("insanely long template name %s", de->d_name); memcpy(path + baselen, de->d_name, namelen+1); memcpy(template + template_baselen, de->d_name, namelen+1); if (lstat(path, &st_git)) { if (errno != ENOENT) die_errno("cannot stat '%s'", path); } else exists = 1; if (lstat(template, &st_template)) die_errno("cannot stat template '%s'", template); if (S_ISDIR(st_template.st_mode)) { DIR *subdir = opendir(template); int baselen_sub = baselen + namelen; int template_baselen_sub = template_baselen + namelen; if (!subdir) die_errno("cannot opendir '%s'", template); path[baselen_sub++] = template[template_baselen_sub++] = '/'; path[baselen_sub] = template[template_baselen_sub] = 0; copy_templates_1(path, baselen_sub, template, template_baselen_sub, subdir); closedir(subdir); } else if (exists) continue; else if (S_ISLNK(st_template.st_mode)) { char lnk[256]; int len; len = readlink(template, lnk, sizeof(lnk)); if (len < 0) die_errno("cannot readlink '%s'", template); if (sizeof(lnk) <= len) die("insanely long symlink %s", template); lnk[len] = 0; if (symlink(lnk, path)) die_errno("cannot symlink '%s' '%s'", lnk, path); } else if (S_ISREG(st_template.st_mode)) { if (copy_file(path, template, st_template.st_mode)) die_errno("cannot copy '%s' to '%s'", template, path); } else error("ignoring template %s", template); } } static void copy_templates(const char *template_dir) { char path[PATH_MAX]; char template_path[PATH_MAX]; int template_len; DIR *dir; const char *git_dir = get_git_dir(); int len = strlen(git_dir); if (!template_dir) template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT); if (!template_dir) template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR); if (!template_dir[0]) return; template_len = strlen(template_dir); if (PATH_MAX <= (template_len+strlen("/config"))) die("insanely long template path %s", template_dir); strcpy(template_path, template_dir); if (template_path[template_len-1] != '/') { template_path[template_len++] = '/'; template_path[template_len] = 0; } dir = opendir(template_path); if (!dir) { warning("templates not found %s", template_dir); return; } /* Make sure that template is from the correct vintage */ strcpy(template_path + template_len, "config"); repository_format_version = 0; git_config_from_file(check_repository_format_version, template_path, NULL); template_path[template_len] = 0; if (repository_format_version && repository_format_version != GIT_REPO_VERSION) { warning("not copying templates of " "a wrong format version %d from '%s'", repository_format_version, template_dir); closedir(dir); return; } memcpy(path, git_dir, len); if (len && path[len - 1] != '/') path[len++] = '/'; path[len] = 0; copy_templates_1(path, len, template_path, template_len, dir); closedir(dir); } static int create_default_files(const char *template_path) { const char *git_dir = get_git_dir(); unsigned len = strlen(git_dir); static char path[PATH_MAX]; struct stat st1; char repo_version_string[10]; char junk[2]; int reinit; int filemode; if (len > sizeof(path)-50) die("insane git directory %s", git_dir); memcpy(path, git_dir, len); if (len && path[len-1] != '/') path[len++] = '/'; /* * Create .git/refs/{heads,tags} */ safe_create_dir(git_path("refs"), 1); safe_create_dir(git_path("refs/heads"), 1); safe_create_dir(git_path("refs/tags"), 1); /* First copy the templates -- we might have the default * config file there, in which case we would want to read * from it after installing. */ copy_templates(template_path); git_config(git_default_config, NULL); is_bare_repository_cfg = init_is_bare_repository; /* reading existing config may have overwrote it */ if (init_shared_repository != -1) shared_repository = init_shared_repository; /* * We would have created the above under user's umask -- under * shared-repository settings, we would need to fix them up. */ if (shared_repository) { adjust_shared_perm(get_git_dir()); adjust_shared_perm(git_path("refs")); adjust_shared_perm(git_path("refs/heads")); adjust_shared_perm(git_path("refs/tags")); } /* * Create the default symlink from ".git/HEAD" to the "master" * branch, if it does not exist yet. */ strcpy(path + len, "HEAD"); reinit = (!access(path, R_OK) || readlink(path, junk, sizeof(junk)-1) != -1); if (!reinit) { if (create_symref("HEAD", "refs/heads/master", NULL) < 0) exit(1); } /* This forces creation of new config file */ sprintf(repo_version_string, "%d", GIT_REPO_VERSION); git_config_set("core.repositoryformatversion", repo_version_string); path[len] = 0; strcpy(path + len, "config"); /* Check filemode trustability */ filemode = TEST_FILEMODE; if (TEST_FILEMODE && !lstat(path, &st1)) { struct stat st2; filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) && !lstat(path, &st2) && st1.st_mode != st2.st_mode); } git_config_set("core.filemode", filemode ? "true" : "false"); if (is_bare_repository()) git_config_set("core.bare", "true"); else { const char *work_tree = get_git_work_tree(); git_config_set("core.bare", "false"); /* allow template config file to override the default */ if (log_all_ref_updates == -1) git_config_set("core.logallrefupdates", "true"); if (prefixcmp(git_dir, work_tree) || strcmp(git_dir + strlen(work_tree), "/.git")) { git_config_set("core.worktree", work_tree); } } if (!reinit) { /* Check if symlink is supported in the work tree */ path[len] = 0; strcpy(path + len, "tXXXXXX"); if (!close(xmkstemp(path)) && !unlink(path) && !symlink("testing", path) && !lstat(path, &st1) && S_ISLNK(st1.st_mode)) unlink(path); /* good */ else git_config_set("core.symlinks", "false"); /* Check if the filesystem is case-insensitive */ path[len] = 0; strcpy(path + len, "CoNfIg"); if (!access(path, F_OK)) git_config_set("core.ignorecase", "true"); } return reinit; } int init_db(const char *template_dir, unsigned int flags) { const char *sha1_dir; char *path; int len, reinit; safe_create_dir(get_git_dir(), 0); init_is_bare_repository = is_bare_repository(); /* Check to see if the repository version is right. * Note that a newly created repository does not have * config file, so this will not fail. What we are catching * is an attempt to reinitialize new repository with an old tool. */ check_repository_format(); reinit = create_default_files(template_dir); sha1_dir = get_object_directory(); len = strlen(sha1_dir); path = xmalloc(len + 40); memcpy(path, sha1_dir, len); safe_create_dir(sha1_dir, 1); strcpy(path+len, "/pack"); safe_create_dir(path, 1); strcpy(path+len, "/info"); safe_create_dir(path, 1); if (shared_repository) { char buf[10]; /* We do not spell "group" and such, so that * the configuration can be read by older version * of git. Note, we use octal numbers for new share modes, * and compatibility values for PERM_GROUP and * PERM_EVERYBODY. */ if (shared_repository < 0) /* force to the mode value */ sprintf(buf, "0%o", -shared_repository); else if (shared_repository == PERM_GROUP) sprintf(buf, "%d", OLD_PERM_GROUP); else if (shared_repository == PERM_EVERYBODY) sprintf(buf, "%d", OLD_PERM_EVERYBODY); else die("oops"); git_config_set("core.sharedrepository", buf); git_config_set("receive.denyNonFastforwards", "true"); } if (!(flags & INIT_DB_QUIET)) printf("%s%s Git repository in %s/\n", reinit ? "Reinitialized existing" : "Initialized empty", shared_repository ? " shared" : "", get_git_dir()); return 0; } static int guess_repository_type(const char *git_dir) { char cwd[PATH_MAX]; const char *slash; /* * "GIT_DIR=. git init" is always bare. * "GIT_DIR=`pwd` git init" too. */ if (!strcmp(".", git_dir)) return 1; if (!getcwd(cwd, sizeof(cwd))) die_errno("cannot tell cwd"); if (!strcmp(git_dir, cwd)) return 1; /* * "GIT_DIR=.git or GIT_DIR=something/.git is usually not. */ if (!strcmp(git_dir, ".git")) return 0; slash = strrchr(git_dir, '/'); if (slash && !strcmp(slash, "/.git")) return 0; /* * Otherwise it is often bare. At this point * we are just guessing. */ return 1; } static int shared_callback(const struct option *opt, const char *arg, int unset) { *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP; return 0; } static const char *const init_db_usage[] = { "git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [directory]", NULL }; /* * If you want to, you can share the DB area with any number of branches. * That has advantages: you can save space by sharing all the SHA1 objects. * On the other hand, it might just make lookup slower and messier. You * be the judge. The default case is to have one DB per managed directory. */ int cmd_init_db(int argc, const char **argv, const char *prefix) { const char *git_dir; const char *template_dir = NULL; unsigned int flags = 0; const struct option init_db_options[] = { OPT_STRING(0, "template", &template_dir, "template-directory", "provide the directory from which templates will be used"), OPT_SET_INT(0, "bare", &is_bare_repository_cfg, "create a bare repository", 1), { OPTION_CALLBACK, 0, "shared", &init_shared_repository, "permissions", "specify that the git repository is to be shared amongst several users", PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0}, OPT_BIT('q', "quiet", &flags, "be quiet", INIT_DB_QUIET), OPT_END() }; argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0); if (argc == 1) { int mkdir_tried = 0; retry: if (chdir(argv[0]) < 0) { if (!mkdir_tried) { int saved; /* * At this point we haven't read any configuration, * and we know shared_repository should always be 0; * but just in case we play safe. */ saved = shared_repository; shared_repository = 0; switch (safe_create_leading_directories_const(argv[0])) { case -3: errno = EEXIST; /* fallthru */ case -1: die_errno("cannot mkdir %s", argv[0]); break; default: break; } shared_repository = saved; if (mkdir(argv[0], 0777) < 0) die_errno("cannot mkdir %s", argv[0]); mkdir_tried = 1; goto retry; } die_errno("cannot chdir to %s", argv[0]); } } else if (0 < argc) { usage(init_db_usage[0]); } if (is_bare_repository_cfg == 1) { static char git_dir[PATH_MAX+1]; setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0); } if (init_shared_repository != -1) shared_repository = init_shared_repository; /* * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR * without --bare. Catch the error early. */ git_dir = getenv(GIT_DIR_ENVIRONMENT); if ((!git_dir || is_bare_repository_cfg == 1) && getenv(GIT_WORK_TREE_ENVIRONMENT)) die("%s (or --work-tree=<directory>) not allowed without " "specifying %s (or --git-dir=<directory>)", GIT_WORK_TREE_ENVIRONMENT, GIT_DIR_ENVIRONMENT); /* * Set up the default .git directory contents */ if (!git_dir) git_dir = DEFAULT_GIT_DIR_ENVIRONMENT; if (is_bare_repository_cfg < 0) is_bare_repository_cfg = guess_repository_type(git_dir); if (!is_bare_repository_cfg) { if (git_dir) { const char *git_dir_parent = strrchr(git_dir, '/'); if (git_dir_parent) { char *rel = xstrndup(git_dir, git_dir_parent - git_dir); git_work_tree_cfg = xstrdup(make_absolute_path(rel)); free(rel); } } if (!git_work_tree_cfg) { git_work_tree_cfg = xcalloc(PATH_MAX, 1); if (!getcwd(git_work_tree_cfg, PATH_MAX)) die_errno ("Cannot access current working directory"); } if (access(get_git_work_tree(), X_OK)) die_errno ("Cannot access work tree '%s'", get_git_work_tree()); } set_git_dir(make_absolute_path(git_dir)); return init_db(template_dir, flags); }