| /* |
| * 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); |
| } |