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-rw-r--r--builtin/init-db.c106
1 files changed, 91 insertions, 15 deletions
diff --git a/builtin/init-db.c b/builtin/init-db.c
index 944ec77..cee6482 100644
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -20,6 +20,8 @@
#define TEST_FILEMODE 1
#endif
+#define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH"
+
static int init_is_bare_repository = 0;
static int init_shared_repository = -1;
static const char *init_db_template_dir;
@@ -176,13 +178,37 @@ static int needs_work_tree_config(const char *git_dir, const char *work_tree)
return 1;
}
+void initialize_repository_version(int hash_algo)
+{
+ char repo_version_string[10];
+ int repo_version = GIT_REPO_VERSION;
+
+#ifndef ENABLE_SHA256
+ if (hash_algo != GIT_HASH_SHA1)
+ die(_("The hash algorithm %s is not supported in this build."), hash_algos[hash_algo].name);
+#endif
+
+ 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);
+}
+
static int create_default_files(const char *template_path,
- const char *original_git_dir)
+ const char *original_git_dir,
+ const char *initial_branch,
+ const struct repository_format *fmt)
{
struct stat st1;
struct strbuf buf = STRBUF_INIT;
char *path;
- char repo_version_string[10];
char junk[2];
int reinit;
int filemode;
@@ -233,21 +259,29 @@ static int create_default_files(const char *template_path,
die("failed to set up refs db: %s", err.buf);
/*
- * Create the default symlink from ".git/HEAD" to the "master"
- * branch, if it does not exist yet.
+ * 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) {
- if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
+ char *ref;
+
+ if (!initial_branch)
+ initial_branch = git_default_branch_name();
+
+ 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);
}
- /* This forces creation of new config file */
- xsnprintf(repo_version_string, sizeof(repo_version_string),
- "%d", GIT_REPO_VERSION);
- git_config_set("core.repositoryformatversion", repo_version_string);
+ initialize_repository_version(fmt->hash_algo);
/* Check filemode trustability */
path = git_path_buf(&buf, "config");
@@ -340,12 +374,34 @@ static void separate_git_dir(const char *git_dir, const char *git_link)
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, unsigned int flags)
+ const char *template_dir, int hash, const char *initial_branch,
+ 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;
if (real_git_dir) {
struct stat st;
@@ -356,12 +412,12 @@ int init_db(const char *git_dir, const char *real_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));
+ set_git_dir(real_git_dir, 1);
git_dir = get_git_dir();
separate_git_dir(git_dir, original_git_dir);
}
else {
- set_git_dir(real_path(git_dir));
+ set_git_dir(git_dir, 1);
git_dir = get_git_dir();
}
startup_info->have_repository = 1;
@@ -378,9 +434,15 @@ int init_db(const char *git_dir, const char *real_git_dir,
* 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();
+ check_repository_format(&repo_fmt);
- reinit = create_default_files(template_dir, original_git_dir);
+ validate_hash_algorithm(&repo_fmt, hash);
+
+ reinit = create_default_files(template_dir, original_git_dir,
+ initial_branch, &repo_fmt);
+ if (reinit && initial_branch)
+ warning(_("re-init: ignored --initial-branch=%s"),
+ initial_branch);
create_object_directory();
@@ -482,6 +544,9 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
const char *work_tree;
const char *template_dir = NULL;
unsigned int flags = 0;
+ const char *object_format = NULL;
+ const char *initial_branch = NULL;
+ int hash_algo = GIT_HASH_UNKNOWN;
const struct option init_db_options[] = {
OPT_STRING(0, "template", &template_dir, N_("template-directory"),
N_("directory from which templates will be used")),
@@ -494,6 +559,10 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
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_STRING('b', "initial-branch", &initial_branch, N_("name"),
+ N_("override the name of the initial branch")),
+ OPT_STRING(0, "object-format", &object_format, N_("hash"),
+ N_("specify the hash algorithm to use")),
OPT_END()
};
@@ -546,6 +615,12 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
free(cwd);
}
+ if (object_format) {
+ hash_algo = hash_algo_by_name(object_format);
+ if (hash_algo == GIT_HASH_UNKNOWN)
+ die(_("unknown hash algorithm '%s'"), object_format);
+ }
+
if (init_shared_repository != -1)
set_shared_repository(init_shared_repository);
@@ -597,5 +672,6 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
UNLEAK(work_tree);
flags |= INIT_DB_EXIST_OK;
- return init_db(git_dir, real_git_dir, template_dir, flags);
+ return init_db(git_dir, real_git_dir, template_dir, hash_algo,
+ initial_branch, flags);
}
generated by cgit v0.10.2-6-g49f6 at 2024-04-26 09:03:02 (GMT)