diff options
author | Elijah Newren <newren@gmail.com> | 2023-05-16 09:33:44 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2023-06-21 23:39:53 +0300 |
commit | e8cf8ef5075d7805846f0f7159f8d072b07e588e (patch) | |
tree | b69f575968eeff49cb682502e5687e1587f6374c /builtin | |
parent | fc8173505703a08bea5c648f1ab286013c3fd730 (diff) |
setup: adopt shared init-db & clone code
The functions init_db() and initialize_repository_version() were shared
by builtin/init-db.c and builtin/clone.c, and declared in cache.h.
Move these functions, plus their several helpers only used by these
functions, to setup.[ch].
Diff best viewed with `--color-moved`.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin')
-rw-r--r-- | builtin/init-db.c | 496 |
1 files changed, 0 insertions, 496 deletions
diff --git a/builtin/init-db.c b/builtin/init-db.c index ae0122534a..feb019a9de 100644 --- a/builtin/init-db.c +++ b/builtin/init-db.c @@ -6,511 +6,15 @@ #include "cache.h" #include "abspath.h" #include "config.h" -#include "copy.h" #include "environment.h" #include "gettext.h" -#include "refs.h" #include "builtin.h" -#include "exec-cmd.h" #include "object-file.h" #include "parse-options.h" #include "path.h" #include "setup.h" -#include "worktree.h" #include "wrapper.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 - -#define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH" - -static void copy_templates_1(struct strbuf *path, struct strbuf *template_path, - DIR *dir) -{ - size_t path_baselen = path->len; - size_t template_baselen = template_path->len; - 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->buf, 1); - while ((de = readdir(dir)) != NULL) { - struct stat st_git, st_template; - int exists = 0; - - strbuf_setlen(path, path_baselen); - strbuf_setlen(template_path, template_baselen); - - if (de->d_name[0] == '.') - continue; - strbuf_addstr(path, de->d_name); - strbuf_addstr(template_path, de->d_name); - if (lstat(path->buf, &st_git)) { - if (errno != ENOENT) - die_errno(_("cannot stat '%s'"), path->buf); - } - else - exists = 1; - - if (lstat(template_path->buf, &st_template)) - die_errno(_("cannot stat template '%s'"), template_path->buf); - - if (S_ISDIR(st_template.st_mode)) { - DIR *subdir = opendir(template_path->buf); - if (!subdir) - die_errno(_("cannot opendir '%s'"), template_path->buf); - strbuf_addch(path, '/'); - strbuf_addch(template_path, '/'); - copy_templates_1(path, template_path, subdir); - closedir(subdir); - } - else if (exists) - continue; - else if (S_ISLNK(st_template.st_mode)) { - struct strbuf lnk = STRBUF_INIT; - if (strbuf_readlink(&lnk, template_path->buf, - st_template.st_size) < 0) - die_errno(_("cannot readlink '%s'"), template_path->buf); - if (symlink(lnk.buf, path->buf)) - die_errno(_("cannot symlink '%s' '%s'"), - lnk.buf, path->buf); - strbuf_release(&lnk); - } - else if (S_ISREG(st_template.st_mode)) { - if (copy_file(path->buf, template_path->buf, st_template.st_mode)) - die_errno(_("cannot copy '%s' to '%s'"), - template_path->buf, path->buf); - } - else - error(_("ignoring template %s"), template_path->buf); - } -} - -static void copy_templates(const char *template_dir, const char *init_template_dir) -{ - struct strbuf path = STRBUF_INIT; - struct strbuf template_path = STRBUF_INIT; - size_t template_len; - struct repository_format template_format = REPOSITORY_FORMAT_INIT; - struct strbuf err = STRBUF_INIT; - DIR *dir; - char *to_free = NULL; - - if (!template_dir) - template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT); - if (!template_dir) - template_dir = init_template_dir; - if (!template_dir) - template_dir = to_free = system_path(DEFAULT_GIT_TEMPLATE_DIR); - if (!template_dir[0]) { - free(to_free); - return; - } - - strbuf_addstr(&template_path, template_dir); - strbuf_complete(&template_path, '/'); - template_len = template_path.len; - - dir = opendir(template_path.buf); - if (!dir) { - warning(_("templates not found in %s"), template_dir); - goto free_return; - } - - /* Make sure that template is from the correct vintage */ - strbuf_addstr(&template_path, "config"); - read_repository_format(&template_format, template_path.buf); - strbuf_setlen(&template_path, template_len); - - /* - * No mention of version at all is OK, but anything else should be - * verified. - */ - if (template_format.version >= 0 && - verify_repository_format(&template_format, &err) < 0) { - warning(_("not copying templates from '%s': %s"), - template_dir, err.buf); - strbuf_release(&err); - goto close_free_return; - } - - strbuf_addstr(&path, get_git_common_dir()); - strbuf_complete(&path, '/'); - copy_templates_1(&path, &template_path, dir); -close_free_return: - closedir(dir); -free_return: - free(to_free); - strbuf_release(&path); - strbuf_release(&template_path); - clear_repository_format(&template_format); -} - -/* - * If the git_dir is not directly inside the working tree, then git will not - * find it by default, and we need to set the worktree explicitly. - */ -static int needs_work_tree_config(const char *git_dir, const char *work_tree) -{ - if (!strcmp(work_tree, "/") && !strcmp(git_dir, "/.git")) - return 0; - if (skip_prefix(git_dir, work_tree, &git_dir) && - !strcmp(git_dir, "/.git")) - return 0; - return 1; -} - -void initialize_repository_version(int hash_algo, int reinit) -{ - char repo_version_string[10]; - int repo_version = GIT_REPO_VERSION; - - if (hash_algo != GIT_HASH_SHA1) - repo_version = GIT_REPO_VERSION_READ; - - /* This forces creation of new config file */ - xsnprintf(repo_version_string, sizeof(repo_version_string), - "%d", repo_version); - git_config_set("core.repositoryformatversion", repo_version_string); - - if (hash_algo != GIT_HASH_SHA1) - git_config_set("extensions.objectformat", - hash_algos[hash_algo].name); - else if (reinit) - git_config_set_gently("extensions.objectformat", NULL); -} - -static int create_default_files(const char *template_path, - const char *original_git_dir, - const char *initial_branch, - const struct repository_format *fmt, - int prev_bare_repository, - int init_shared_repository, - int quiet) -{ - struct stat st1; - struct strbuf buf = STRBUF_INIT; - char *path; - char junk[2]; - int reinit; - int filemode; - struct strbuf err = STRBUF_INIT; - const char *init_template_dir = NULL; - const char *work_tree = get_git_work_tree(); - - /* - * First copy the templates -- we might have the default - * config file there, in which case we would want to read - * from it after installing. - * - * Before reading that config, we also need to clear out any cached - * values (since we've just potentially changed what's available on - * disk). - */ - git_config_get_pathname("init.templatedir", &init_template_dir); - copy_templates(template_path, init_template_dir); - free((char *)init_template_dir); - git_config_clear(); - reset_shared_repository(); - git_config(git_default_config, NULL); - - /* - * We must make sure command-line options continue to override any - * values we might have just re-read from the config. - */ - if (init_shared_repository != -1) - set_shared_repository(init_shared_repository); - /* - * TODO: heed core.bare from config file in templates if no - * command-line override given - */ - is_bare_repository_cfg = prev_bare_repository || !work_tree; - /* TODO (continued): - * - * Unfortunately, the line above is equivalent to - * is_bare_repository_cfg = !work_tree; - * which ignores the config entirely even if no `--[no-]bare` - * command line option was present. - * - * To see why, note that before this function, there was this call: - * prev_bare_repository = is_bare_repository() - * expanding the right hand side: - * = is_bare_repository_cfg && !get_git_work_tree() - * = is_bare_repository_cfg && !work_tree - * note that the last simplification above is valid because nothing - * calls repo_init() or set_git_work_tree() between any of the - * relevant calls in the code, and thus the !get_git_work_tree() - * calls will return the same result each time. So, what we are - * interested in computing is the right hand side of the line of - * code just above this comment: - * prev_bare_repository || !work_tree - * = is_bare_repository_cfg && !work_tree || !work_tree - * = !work_tree - * because "A && !B || !B == !B" for all boolean values of A & B. - */ - - /* - * We would have created the above under user's umask -- under - * shared-repository settings, we would need to fix them up. - */ - if (get_shared_repository()) { - adjust_shared_perm(get_git_dir()); - } - - /* - * We need to create a "refs" dir in any case so that older - * versions of git can tell that this is a repository. - */ - safe_create_dir(git_path("refs"), 1); - adjust_shared_perm(git_path("refs")); - - if (refs_init_db(&err)) - die("failed to set up refs db: %s", err.buf); - - /* - * Point the HEAD symref to the initial branch with if HEAD does - * not yet exist. - */ - path = git_path_buf(&buf, "HEAD"); - reinit = (!access(path, R_OK) - || readlink(path, junk, sizeof(junk)-1) != -1); - if (!reinit) { - char *ref; - - if (!initial_branch) - initial_branch = git_default_branch_name(quiet); - - ref = xstrfmt("refs/heads/%s", initial_branch); - if (check_refname_format(ref, 0) < 0) - die(_("invalid initial branch name: '%s'"), - initial_branch); - - if (create_symref("HEAD", ref, NULL) < 0) - exit(1); - free(ref); - } - - initialize_repository_version(fmt->hash_algo, 0); - - /* Check filemode trustability */ - path = git_path_buf(&buf, "config"); - 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 && - !chmod(path, st1.st_mode)); - if (filemode && !reinit && (st1.st_mode & S_IXUSR)) - filemode = 0; - } - git_config_set("core.filemode", filemode ? "true" : "false"); - - if (is_bare_repository()) - git_config_set("core.bare", "true"); - else { - git_config_set("core.bare", "false"); - /* allow template config file to override the default */ - if (log_all_ref_updates == LOG_REFS_UNSET) - git_config_set("core.logallrefupdates", "true"); - if (needs_work_tree_config(original_git_dir, work_tree)) - git_config_set("core.worktree", work_tree); - } - - if (!reinit) { - /* Check if symlink is supported in the work tree */ - path = git_path_buf(&buf, "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 = git_path_buf(&buf, "CoNfIg"); - if (!access(path, F_OK)) - git_config_set("core.ignorecase", "true"); - probe_utf8_pathname_composition(); - } - - strbuf_release(&buf); - return reinit; -} - -static void create_object_directory(void) -{ - struct strbuf path = STRBUF_INIT; - size_t baselen; - - strbuf_addstr(&path, get_object_directory()); - baselen = path.len; - - safe_create_dir(path.buf, 1); - - strbuf_setlen(&path, baselen); - strbuf_addstr(&path, "/pack"); - safe_create_dir(path.buf, 1); - - strbuf_setlen(&path, baselen); - strbuf_addstr(&path, "/info"); - safe_create_dir(path.buf, 1); - - strbuf_release(&path); -} - -static void separate_git_dir(const char *git_dir, const char *git_link) -{ - struct stat st; - - if (!stat(git_link, &st)) { - const char *src; - - if (S_ISREG(st.st_mode)) - src = read_gitfile(git_link); - else if (S_ISDIR(st.st_mode)) - src = git_link; - else - die(_("unable to handle file type %d"), (int)st.st_mode); - - if (rename(src, git_dir)) - die_errno(_("unable to move %s to %s"), src, git_dir); - repair_worktrees(NULL, NULL); - } - - write_file(git_link, "gitdir: %s", git_dir); -} - -static void validate_hash_algorithm(struct repository_format *repo_fmt, int hash) -{ - const char *env = getenv(GIT_DEFAULT_HASH_ENVIRONMENT); - /* - * If we already have an initialized repo, don't allow the user to - * specify a different algorithm, as that could cause corruption. - * Otherwise, if the user has specified one on the command line, use it. - */ - if (repo_fmt->version >= 0 && hash != GIT_HASH_UNKNOWN && hash != repo_fmt->hash_algo) - die(_("attempt to reinitialize repository with different hash")); - else if (hash != GIT_HASH_UNKNOWN) - repo_fmt->hash_algo = hash; - else if (env) { - int env_algo = hash_algo_by_name(env); - if (env_algo == GIT_HASH_UNKNOWN) - die(_("unknown hash algorithm '%s'"), env); - repo_fmt->hash_algo = env_algo; - } -} - -int init_db(const char *git_dir, const char *real_git_dir, - const char *template_dir, int hash, const char *initial_branch, - int init_shared_repository, unsigned int flags) -{ - int reinit; - int exist_ok = flags & INIT_DB_EXIST_OK; - char *original_git_dir = real_pathdup(git_dir, 1); - struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; - int prev_bare_repository; - - if (real_git_dir) { - struct stat st; - - if (!exist_ok && !stat(git_dir, &st)) - die(_("%s already exists"), git_dir); - - if (!exist_ok && !stat(real_git_dir, &st)) - die(_("%s already exists"), real_git_dir); - - set_git_dir(real_git_dir, 1); - git_dir = get_git_dir(); - separate_git_dir(git_dir, original_git_dir); - } - else { - set_git_dir(git_dir, 1); - git_dir = get_git_dir(); - } - startup_info->have_repository = 1; - - /* Ensure `core.hidedotfiles` is processed */ - git_config(platform_core_config, NULL); - - safe_create_dir(git_dir, 0); - - prev_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(&repo_fmt); - - validate_hash_algorithm(&repo_fmt, hash); - - reinit = create_default_files(template_dir, original_git_dir, - initial_branch, &repo_fmt, - prev_bare_repository, - init_shared_repository, - flags & INIT_DB_QUIET); - if (reinit && initial_branch) - warning(_("re-init: ignored --initial-branch=%s"), - initial_branch); - - create_object_directory(); - - if (get_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 (get_shared_repository() < 0) - /* force to the mode value */ - xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository()); - else if (get_shared_repository() == PERM_GROUP) - xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP); - else if (get_shared_repository() == PERM_EVERYBODY) - xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY); - else - BUG("invalid value for shared_repository"); - git_config_set("core.sharedrepository", buf); - git_config_set("receive.denyNonFastforwards", "true"); - } - - if (!(flags & INIT_DB_QUIET)) { - int len = strlen(git_dir); - - if (reinit) - printf(get_shared_repository() - ? _("Reinitialized existing shared Git repository in %s%s\n") - : _("Reinitialized existing Git repository in %s%s\n"), - git_dir, len && git_dir[len-1] != '/' ? "/" : ""); - else - printf(get_shared_repository() - ? _("Initialized empty shared Git repository in %s%s\n") - : _("Initialized empty Git repository in %s%s\n"), - git_dir, len && git_dir[len-1] != '/' ? "/" : ""); - } - - free(original_git_dir); - return 0; -} - static int guess_repository_type(const char *git_dir) { const char *slash; |