git/builtin/init-db.c
Patrick Steinhardt 318efb966b refs: convert ref storage format to an enum
The ref storage format is tracked as a simple unsigned integer, which
makes it harder than necessary to discover what that integer actually is
or where its values are defined.

Convert the ref storage format to instead be an enum.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-06 09:04:31 -07:00

254 lines
7.3 KiB
C

/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "builtin.h"
#include "abspath.h"
#include "environment.h"
#include "gettext.h"
#include "object-file.h"
#include "parse-options.h"
#include "path.h"
#include "refs.h"
#include "repository.h"
#include "setup.h"
#include "strbuf.h"
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>]\n"
" [--separate-git-dir <git-dir>] [--object-format=<format>]\n"
" [--ref-format=<format>]\n"
" [-b <branch-name> | --initial-branch=<branch-name>]\n"
" [--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 char *object_format = NULL;
const char *ref_format = NULL;
const char *initial_branch = NULL;
int hash_algo = GIT_HASH_UNKNOWN;
enum ref_storage_format ref_storage_format = REF_STORAGE_FORMAT_UNKNOWN;
int init_shared_repository = -1;
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_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_STRING(0, "ref-format", &ref_format, N_("format"),
N_("specify the reference format to use")),
OPT_END()
};
argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
if (real_git_dir && is_bare_repository_cfg == 1)
die(_("options '%s' and '%s' cannot be used together"), "--separate-git-dir", "--bare");
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);
UNLEAK(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 (object_format) {
hash_algo = hash_algo_by_name(object_format);
if (hash_algo == GIT_HASH_UNKNOWN)
die(_("unknown hash algorithm '%s'"), object_format);
}
if (ref_format) {
ref_storage_format = ref_storage_format_by_name(ref_format);
if (ref_storage_format == REF_STORAGE_FORMAT_UNKNOWN)
die(_("unknown ref storage format '%s'"), ref_format);
}
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;
/*
* When --separate-git-dir is used inside a linked worktree, take
* care to ensure that the common .git/ directory is relocated, not
* the worktree-specific .git/worktrees/<id>/ directory.
*/
if (real_git_dir) {
int err;
const char *p;
struct strbuf sb = STRBUF_INIT;
p = read_gitfile_gently(git_dir, &err);
if (p && get_common_dir(&sb, p)) {
struct strbuf mainwt = STRBUF_INIT;
strbuf_addbuf(&mainwt, &sb);
strbuf_strip_suffix(&mainwt, "/.git");
if (chdir(mainwt.buf) < 0)
die_errno(_("cannot chdir to %s"), mainwt.buf);
strbuf_release(&mainwt);
git_dir = strbuf_detach(&sb, NULL);
}
strbuf_release(&sb);
}
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 (real_git_dir)
die(_("--separate-git-dir incompatible with bare repository"));
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, hash_algo,
ref_storage_format, initial_branch,
init_shared_repository, flags);
}