Squashed 'third_party/git/' content from commit cb71568594
git-subtree-dir: third_party/git git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7
This commit is contained in:
Vincent Ambo
commit
1b593e1ea4
3629 changed files with 1139935 additions and 0 deletions
601
builtin/init-db.c
Normal file
601
builtin/init-db.c
Normal file
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@ -0,0 +1,601 @@
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/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#include "config.h"
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#include "refs.h"
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#include "builtin.h"
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#include "exec-cmd.h"
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#include "parse-options.h"
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#ifndef DEFAULT_GIT_TEMPLATE_DIR
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#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
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#endif
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#ifdef NO_TRUSTABLE_FILEMODE
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#define TEST_FILEMODE 0
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#else
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#define TEST_FILEMODE 1
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#endif
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static int init_is_bare_repository = 0;
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static int init_shared_repository = -1;
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static const char *init_db_template_dir;
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static void copy_templates_1(struct strbuf *path, struct strbuf *template_path,
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DIR *dir)
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{
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size_t path_baselen = path->len;
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size_t template_baselen = template_path->len;
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struct dirent *de;
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/* Note: if ".git/hooks" file exists in the repository being
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* re-initialized, /etc/core-git/templates/hooks/update would
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* cause "git init" to fail here. I think this is sane but
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* it means that the set of templates we ship by default, along
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* with the way the namespace under .git/ is organized, should
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* be really carefully chosen.
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*/
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safe_create_dir(path->buf, 1);
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while ((de = readdir(dir)) != NULL) {
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struct stat st_git, st_template;
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int exists = 0;
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strbuf_setlen(path, path_baselen);
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strbuf_setlen(template_path, template_baselen);
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if (de->d_name[0] == '.')
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continue;
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strbuf_addstr(path, de->d_name);
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strbuf_addstr(template_path, de->d_name);
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if (lstat(path->buf, &st_git)) {
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if (errno != ENOENT)
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die_errno(_("cannot stat '%s'"), path->buf);
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}
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else
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exists = 1;
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if (lstat(template_path->buf, &st_template))
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die_errno(_("cannot stat template '%s'"), template_path->buf);
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if (S_ISDIR(st_template.st_mode)) {
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DIR *subdir = opendir(template_path->buf);
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if (!subdir)
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die_errno(_("cannot opendir '%s'"), template_path->buf);
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strbuf_addch(path, '/');
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strbuf_addch(template_path, '/');
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copy_templates_1(path, template_path, subdir);
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closedir(subdir);
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}
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else if (exists)
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continue;
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else if (S_ISLNK(st_template.st_mode)) {
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struct strbuf lnk = STRBUF_INIT;
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if (strbuf_readlink(&lnk, template_path->buf,
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st_template.st_size) < 0)
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die_errno(_("cannot readlink '%s'"), template_path->buf);
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if (symlink(lnk.buf, path->buf))
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die_errno(_("cannot symlink '%s' '%s'"),
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lnk.buf, path->buf);
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strbuf_release(&lnk);
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}
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else if (S_ISREG(st_template.st_mode)) {
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if (copy_file(path->buf, template_path->buf, st_template.st_mode))
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die_errno(_("cannot copy '%s' to '%s'"),
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template_path->buf, path->buf);
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}
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else
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error(_("ignoring template %s"), template_path->buf);
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}
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}
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static void copy_templates(const char *template_dir)
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{
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struct strbuf path = STRBUF_INIT;
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struct strbuf template_path = STRBUF_INIT;
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size_t template_len;
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struct repository_format template_format = REPOSITORY_FORMAT_INIT;
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struct strbuf err = STRBUF_INIT;
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DIR *dir;
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char *to_free = NULL;
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if (!template_dir)
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template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
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if (!template_dir)
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template_dir = init_db_template_dir;
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if (!template_dir)
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template_dir = to_free = system_path(DEFAULT_GIT_TEMPLATE_DIR);
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if (!template_dir[0]) {
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free(to_free);
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return;
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}
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strbuf_addstr(&template_path, template_dir);
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strbuf_complete(&template_path, '/');
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template_len = template_path.len;
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dir = opendir(template_path.buf);
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if (!dir) {
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warning(_("templates not found in %s"), template_dir);
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goto free_return;
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}
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/* Make sure that template is from the correct vintage */
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strbuf_addstr(&template_path, "config");
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read_repository_format(&template_format, template_path.buf);
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strbuf_setlen(&template_path, template_len);
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/*
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* No mention of version at all is OK, but anything else should be
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* verified.
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*/
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if (template_format.version >= 0 &&
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verify_repository_format(&template_format, &err) < 0) {
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warning(_("not copying templates from '%s': %s"),
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template_dir, err.buf);
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strbuf_release(&err);
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goto close_free_return;
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}
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strbuf_addstr(&path, get_git_common_dir());
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strbuf_complete(&path, '/');
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copy_templates_1(&path, &template_path, dir);
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close_free_return:
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closedir(dir);
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free_return:
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free(to_free);
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strbuf_release(&path);
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strbuf_release(&template_path);
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clear_repository_format(&template_format);
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}
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static int git_init_db_config(const char *k, const char *v, void *cb)
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{
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if (!strcmp(k, "init.templatedir"))
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return git_config_pathname(&init_db_template_dir, k, v);
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if (starts_with(k, "core."))
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return platform_core_config(k, v, cb);
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return 0;
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}
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/*
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* If the git_dir is not directly inside the working tree, then git will not
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* find it by default, and we need to set the worktree explicitly.
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*/
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static int needs_work_tree_config(const char *git_dir, const char *work_tree)
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{
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if (!strcmp(work_tree, "/") && !strcmp(git_dir, "/.git"))
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return 0;
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if (skip_prefix(git_dir, work_tree, &git_dir) &&
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!strcmp(git_dir, "/.git"))
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return 0;
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return 1;
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}
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static int create_default_files(const char *template_path,
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const char *original_git_dir)
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{
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struct stat st1;
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struct strbuf buf = STRBUF_INIT;
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char *path;
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char repo_version_string[10];
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char junk[2];
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int reinit;
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int filemode;
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struct strbuf err = STRBUF_INIT;
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/* Just look for `init.templatedir` */
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init_db_template_dir = NULL; /* re-set in case it was set before */
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git_config(git_init_db_config, NULL);
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/*
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* First copy the templates -- we might have the default
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* config file there, in which case we would want to read
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* from it after installing.
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*
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* Before reading that config, we also need to clear out any cached
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* values (since we've just potentially changed what's available on
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* disk).
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*/
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copy_templates(template_path);
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git_config_clear();
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reset_shared_repository();
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git_config(git_default_config, NULL);
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/*
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* We must make sure command-line options continue to override any
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* values we might have just re-read from the config.
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*/
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is_bare_repository_cfg = init_is_bare_repository;
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if (init_shared_repository != -1)
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set_shared_repository(init_shared_repository);
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/*
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* We would have created the above under user's umask -- under
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* shared-repository settings, we would need to fix them up.
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*/
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if (get_shared_repository()) {
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adjust_shared_perm(get_git_dir());
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}
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/*
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* We need to create a "refs" dir in any case so that older
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* versions of git can tell that this is a repository.
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*/
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safe_create_dir(git_path("refs"), 1);
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adjust_shared_perm(git_path("refs"));
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if (refs_init_db(&err))
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die("failed to set up refs db: %s", err.buf);
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/*
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* Create the default symlink from ".git/HEAD" to the "master"
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* branch, if it does not exist yet.
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*/
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path = git_path_buf(&buf, "HEAD");
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reinit = (!access(path, R_OK)
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|| readlink(path, junk, sizeof(junk)-1) != -1);
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if (!reinit) {
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if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
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exit(1);
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}
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/* This forces creation of new config file */
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xsnprintf(repo_version_string, sizeof(repo_version_string),
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"%d", GIT_REPO_VERSION);
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git_config_set("core.repositoryformatversion", repo_version_string);
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/* Check filemode trustability */
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path = git_path_buf(&buf, "config");
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filemode = TEST_FILEMODE;
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if (TEST_FILEMODE && !lstat(path, &st1)) {
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struct stat st2;
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filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
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!lstat(path, &st2) &&
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st1.st_mode != st2.st_mode &&
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!chmod(path, st1.st_mode));
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if (filemode && !reinit && (st1.st_mode & S_IXUSR))
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filemode = 0;
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}
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git_config_set("core.filemode", filemode ? "true" : "false");
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if (is_bare_repository())
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git_config_set("core.bare", "true");
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else {
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const char *work_tree = get_git_work_tree();
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git_config_set("core.bare", "false");
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/* allow template config file to override the default */
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if (log_all_ref_updates == LOG_REFS_UNSET)
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git_config_set("core.logallrefupdates", "true");
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if (needs_work_tree_config(original_git_dir, work_tree))
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git_config_set("core.worktree", work_tree);
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}
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if (!reinit) {
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/* Check if symlink is supported in the work tree */
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path = git_path_buf(&buf, "tXXXXXX");
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if (!close(xmkstemp(path)) &&
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!unlink(path) &&
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!symlink("testing", path) &&
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!lstat(path, &st1) &&
|
||||
S_ISLNK(st1.st_mode))
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||||
unlink(path); /* good */
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else
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||||
git_config_set("core.symlinks", "false");
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/* Check if the filesystem is case-insensitive */
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path = git_path_buf(&buf, "CoNfIg");
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if (!access(path, F_OK))
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git_config_set("core.ignorecase", "true");
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probe_utf8_pathname_composition();
|
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}
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|
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strbuf_release(&buf);
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return reinit;
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}
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|
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static void create_object_directory(void)
|
||||
{
|
||||
struct strbuf path = STRBUF_INIT;
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size_t baselen;
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|
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strbuf_addstr(&path, get_object_directory());
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baselen = path.len;
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||||
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||||
safe_create_dir(path.buf, 1);
|
||||
|
||||
strbuf_setlen(&path, baselen);
|
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strbuf_addstr(&path, "/pack");
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safe_create_dir(path.buf, 1);
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|
||||
strbuf_setlen(&path, baselen);
|
||||
strbuf_addstr(&path, "/info");
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||||
safe_create_dir(path.buf, 1);
|
||||
|
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strbuf_release(&path);
|
||||
}
|
||||
|
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static void separate_git_dir(const char *git_dir, const char *git_link)
|
||||
{
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struct stat st;
|
||||
|
||||
if (!stat(git_link, &st)) {
|
||||
const char *src;
|
||||
|
||||
if (S_ISREG(st.st_mode))
|
||||
src = read_gitfile(git_link);
|
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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);
|
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}
|
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write_file(git_link, "gitdir: %s", git_dir);
|
||||
}
|
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|
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int init_db(const char *git_dir, const char *real_git_dir,
|
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const char *template_dir, unsigned int flags)
|
||||
{
|
||||
int reinit;
|
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int exist_ok = flags & INIT_DB_EXIST_OK;
|
||||
char *original_git_dir = real_pathdup(git_dir, 1);
|
||||
|
||||
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_path(real_git_dir));
|
||||
git_dir = get_git_dir();
|
||||
separate_git_dir(git_dir, original_git_dir);
|
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}
|
||||
else {
|
||||
set_git_dir(real_path(git_dir));
|
||||
git_dir = get_git_dir();
|
||||
}
|
||||
startup_info->have_repository = 1;
|
||||
|
||||
/* Just look for `core.hidedotfiles` */
|
||||
git_config(git_init_db_config, NULL);
|
||||
|
||||
safe_create_dir(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, original_git_dir);
|
||||
|
||||
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;
|
||||
char *cwd;
|
||||
int cwd_is_git_dir;
|
||||
|
||||
/*
|
||||
* "GIT_DIR=. git init" is always bare.
|
||||
* "GIT_DIR=`pwd` git init" too.
|
||||
*/
|
||||
if (!strcmp(".", git_dir))
|
||||
return 1;
|
||||
cwd = xgetcwd();
|
||||
cwd_is_git_dir = !strcmp(git_dir, cwd);
|
||||
free(cwd);
|
||||
if (cwd_is_git_dir)
|
||||
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)
|
||||
{
|
||||
BUG_ON_OPT_NEG(unset);
|
||||
*((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const char *const init_db_usage[] = {
|
||||
N_("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 *real_git_dir = NULL;
|
||||
const char *work_tree;
|
||||
const char *template_dir = NULL;
|
||||
unsigned int flags = 0;
|
||||
const struct option init_db_options[] = {
|
||||
OPT_STRING(0, "template", &template_dir, N_("template-directory"),
|
||||
N_("directory from which templates will be used")),
|
||||
OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
|
||||
N_("create a bare repository"), 1),
|
||||
{ OPTION_CALLBACK, 0, "shared", &init_shared_repository,
|
||||
N_("permissions"),
|
||||
N_("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, N_("be quiet"), INIT_DB_QUIET),
|
||||
OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
|
||||
N_("separate git dir from working tree")),
|
||||
OPT_END()
|
||||
};
|
||||
|
||||
argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
|
||||
|
||||
if (real_git_dir && !is_absolute_path(real_git_dir))
|
||||
real_git_dir = real_pathdup(real_git_dir, 1);
|
||||
|
||||
if (template_dir && *template_dir && !is_absolute_path(template_dir))
|
||||
template_dir = absolute_pathdup(template_dir);
|
||||
|
||||
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 = get_shared_repository();
|
||||
set_shared_repository(0);
|
||||
switch (safe_create_leading_directories_const(argv[0])) {
|
||||
case SCLD_OK:
|
||||
case SCLD_PERMS:
|
||||
break;
|
||||
case SCLD_EXISTS:
|
||||
errno = EEXIST;
|
||||
/* fallthru */
|
||||
default:
|
||||
die_errno(_("cannot mkdir %s"), argv[0]);
|
||||
break;
|
||||
}
|
||||
set_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) {
|
||||
char *cwd = xgetcwd();
|
||||
setenv(GIT_DIR_ENVIRONMENT, cwd, argc > 0);
|
||||
free(cwd);
|
||||
}
|
||||
|
||||
if (init_shared_repository != -1)
|
||||
set_shared_repository(init_shared_repository);
|
||||
|
||||
/*
|
||||
* GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
|
||||
* without --bare. Catch the error early.
|
||||
*/
|
||||
git_dir = xstrdup_or_null(getenv(GIT_DIR_ENVIRONMENT));
|
||||
work_tree = xstrdup_or_null(getenv(GIT_WORK_TREE_ENVIRONMENT));
|
||||
if ((!git_dir || is_bare_repository_cfg == 1) && work_tree)
|
||||
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) {
|
||||
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 = real_pathdup(rel, 1);
|
||||
free(rel);
|
||||
}
|
||||
if (!git_work_tree_cfg)
|
||||
git_work_tree_cfg = xgetcwd();
|
||||
if (work_tree)
|
||||
set_git_work_tree(work_tree);
|
||||
else
|
||||
set_git_work_tree(git_work_tree_cfg);
|
||||
if (access(get_git_work_tree(), X_OK))
|
||||
die_errno (_("Cannot access work tree '%s'"),
|
||||
get_git_work_tree());
|
||||
}
|
||||
else {
|
||||
if (work_tree)
|
||||
set_git_work_tree(work_tree);
|
||||
}
|
||||
|
||||
UNLEAK(real_git_dir);
|
||||
UNLEAK(git_dir);
|
||||
UNLEAK(work_tree);
|
||||
|
||||
flags |= INIT_DB_EXIST_OK;
|
||||
return init_db(git_dir, real_git_dir, template_dir, flags);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue