/*

 * We put all the git config variables in this same object

 * file, so that programs can link against the config parser

 * without having to link against all the rest of git.

 *

 * In particular, no need to bring in libz etc unless needed,

 * even if you might want to know where the git directory etc

 * are.

 */

#include "cache.h"

#include "branch.h"

#include "repository.h"

#include "config.h"

#include "refs.h"

#include "fmt-merge-msg.h"

#include "commit.h"

#include "argv-array.h"

#include "object-store.h"

#include "chdir-notify.h"

#include "shallow.h"

int trust_executable_bit = 1;

int trust_ctime = 1;

int check_stat = 1;

int has_symlinks = 1;

int minimum_abbrev = 4, default_abbrev = -1;

int ignore_case;

int assume_unchanged;

int prefer_symlink_refs;

int is_bare_repository_cfg = -1; /* unspecified */

int warn_ambiguous_refs = 1;

int warn_on_object_refname_ambiguity = 1;

int ref_paranoia = -1;

int repository_format_precious_objects;

int repository_format_worktree_config;

const char *git_commit_encoding;

const char *git_log_output_encoding;

const char *apply_default_whitespace;

const char *apply_default_ignorewhitespace;

const char *git_attributes_file;

const char *git_hooks_path;

int zlib_compression_level = Z_BEST_SPEED;

int core_compression_level;

int pack_compression_level = Z_DEFAULT_COMPRESSION;

int fsync_object_files;

size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;

size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;

size_t delta_base_cache_limit = 96 * 1024 * 1024;

unsigned long big_file_threshold = 512 * 1024 * 1024;

int pager_use_color = 1;

const char *editor_program;

const char *askpass_program;

const char *excludes_file;

enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;

int read_replace_refs = 1;

char *git_replace_ref_base;

enum eol core_eol = EOL_UNSET;

int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;

char *check_roundtrip_encoding = "SHIFT-JIS";

unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;

enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;

enum rebase_setup_type autorebase = AUTOREBASE_NEVER;

enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;

#ifndef OBJECT_CREATION_MODE

#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS

#endif

enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;

char *notes_ref_name;

int grafts_replace_parents = 1;

int core_apply_sparse_checkout;

int core_sparse_checkout_cone;

int merge_log_config = -1;

int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */

unsigned long pack_size_limit_cfg;

enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;

#ifndef PROTECT_HFS_DEFAULT

#define PROTECT_HFS_DEFAULT 0

#endif

int protect_hfs = PROTECT_HFS_DEFAULT;

#ifndef PROTECT_NTFS_DEFAULT

#define PROTECT_NTFS_DEFAULT 1

#endif

int protect_ntfs = PROTECT_NTFS_DEFAULT;

const char *core_fsmonitor;

/*

 * The character that begins a commented line in user-editable file

 * that is subject to stripspace.

 */

char comment_line_char = '#';

int auto_comment_line_char;

/* Parallel index stat data preload? */

int core_preload_index = 1;

/*

 * This is a hack for test programs like test-dump-untracked-cache to

 * ensure that they do not modify the untracked cache when reading it.

 * Do not use it otherwise!

 */

int ignore_untracked_cache_config;

/* This is set by setup_git_dir_gently() and/or git_default_config() */

char *git_work_tree_cfg;

static char *git_namespace;

static char *super_prefix;

/*

 * Repository-local GIT_* environment variables; see cache.h for details.

 */

const char * const local_repo_env[] = {

	ALTERNATE_DB_ENVIRONMENT,

	CONFIG_ENVIRONMENT,

	CONFIG_DATA_ENVIRONMENT,

	DB_ENVIRONMENT,

	GIT_DIR_ENVIRONMENT,

	GIT_WORK_TREE_ENVIRONMENT,

	GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,

	GRAFT_ENVIRONMENT,

	INDEX_ENVIRONMENT,

	NO_REPLACE_OBJECTS_ENVIRONMENT,

	GIT_REPLACE_REF_BASE_ENVIRONMENT,

	GIT_PREFIX_ENVIRONMENT,

	GIT_SUPER_PREFIX_ENVIRONMENT,

	GIT_SHALLOW_FILE_ENVIRONMENT,

	GIT_COMMON_DIR_ENVIRONMENT,

	NULL

};

static char *expand_namespace(const char *raw_namespace)

{

	struct strbuf buf = STRBUF_INIT;

	struct strbuf **components, **c;

	if (!raw_namespace || !*raw_namespace)

		return xstrdup("");

	strbuf_addstr(&buf, raw_namespace);

	components = strbuf_split(&buf, '/');

	strbuf_reset(&buf;;

	for (c = components; *c; c++)

		if (strcmp((*c)->buf, "/") != 0)

			strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);

	strbuf_list_free(components);

	if (check_refname_format(buf.buf, 0))

		die(_("bad git namespace path \"%s\""), raw_namespace);

	strbuf_addch(&buf, '/');

	return strbuf_detach(&buf, NULL);

}

/*

 * Wrapper of getenv() that returns a strdup value. This value is kept

 * in argv to be freed later.

 */

static const char *getenv_safe(struct argv_array *argv, const char *name)

{

	const char *value = getenv(name);

	if (!value)

		return NULL;

	argv_array_push(argv, value);

	return argv->argv[argv->argc - 1];

}

void setup_git_env(const char *git_dir)

{

	const char *shallow_file;

	const char *replace_ref_base;

	struct set_gitdir_args args = { NULL };

	struct argv_array to_free = ARGV_ARRAY_INIT;

	args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT);

	args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT);

	args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT);

	args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT);

	args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT);

	repo_set_gitdir(the_repository, git_dir, &args);

	argv_array_clear(&to_free);

	if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))

		read_replace_refs = 0;

	replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);

	free(git_replace_ref_base);

	git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base

							  : "refs/replace/");

	free(git_namespace);

	git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));

	shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);

	if (shallow_file)

		set_alternate_shallow_file(the_repository, shallow_file, 0);

}

int is_bare_repository(void)

{

	/* if core.bare is not 'false', let's see if there is a work tree */

	return is_bare_repository_cfg && !get_git_work_tree();

}

int have_git_dir(void)

{

	return startup_info->have_repository

		|| the_repository->gitdir;

}

const char *get_git_dir(void)

{

	if (!the_repository->gitdir)

		BUG("git environment hasn't been setup");

	return the_repository->gitdir;

}

const char *get_git_common_dir(void)

{

	if (!the_repository->commondir)

		BUG("git environment hasn't been setup");

	return the_repository->commondir;

}

const char *get_git_namespace(void)

{

	if (!git_namespace)

		BUG("git environment hasn't been setup");

	return git_namespace;

}

const char *strip_namespace(const char *namespaced_ref)

{

	const char *out;

	if (skip_prefix(namespaced_ref, get_git_namespace(), &out))

		return out;

	return NULL;

}

const char *get_super_prefix(void)

{

	static int initialized;

	if (!initialized) {

		super_prefix = xstrdup_or_null(getenv(GIT_SUPER_PREFIX_ENVIRONMENT));

		initialized = 1;

	}

	return super_prefix;

}

static int git_work_tree_initialized;

/*

 * Note.  This works only before you used a work tree.  This was added

 * primarily to support git-clone to work in a new repository it just

 * created, and is not meant to flip between different work trees.

 */

void set_git_work_tree(const char *new_work_tree)

{

	struct strbuf realpath = STRBUF_INIT;

	if (git_work_tree_initialized) {

		strbuf_realpath(&realpath, new_work_tree, 1);

		new_work_tree = realpath.buf;

		if (strcmp(new_work_tree, the_repository->worktree))

			die("internal error: work tree has already been set\n"

			    "Current worktree: %s\nNew worktree: %s",

			    the_repository->worktree, new_work_tree);

		return;

	}

	git_work_tree_initialized = 1;

	repo_set_worktree(the_repository, new_work_tree);

	strbuf_release(&realpath);

}

const char *get_git_work_tree(void)

{

	return the_repository->worktree;

}

char *get_object_directory(void)

{

	if (!the_repository->objects->odb)

		BUG("git environment hasn't been setup");

	return the_repository->objects->odb->path;

}

int odb_mkstemp(struct strbuf *temp_filename, const char *pattern)

{

	int fd;

	/*

	 * we let the umask do its job, don't try to be more

	 * restrictive except to remove write permission.

	 */

	int mode = 0444;

	git_path_buf(temp_filename, "objects/%s", pattern);

	fd = git_mkstemp_mode(temp_filename->buf, mode);

	if (0 <= fd)

		return fd;

	/* slow path */

	/* some mkstemp implementations erase temp_filename on failure */

	git_path_buf(temp_filename, "objects/%s", pattern);

	safe_create_leading_directories(temp_filename->buf);

	return xmkstemp_mode(temp_filename->buf, mode);

}

int odb_pack_keep(const char *name)

{

	int fd;

	fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);

	if (0 <= fd)

		return fd;

	/* slow path */

	safe_create_leading_directories_const(name);

	return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);

}

char *get_index_file(void)

{

	if (!the_repository->index_file)

		BUG("git environment hasn't been setup");

	return the_repository->index_file;

}

char *get_graft_file(struct repository *r)

{

	if (!r->graft_file)

		BUG("git environment hasn't been setup");

	return r->graft_file;

}

static void set_git_dir_1(const char *path)

{

	if (setenv(GIT_DIR_ENVIRONMENT, path, 1))

		die(_("could not set GIT_DIR to '%s'"), path);

	setup_git_env(path);

}

static void update_relative_gitdir(const char *name,

				   const char *old_cwd,

				   const char *new_cwd,

				   void *data)

{

	char *path = reparent_relative_path(old_cwd, new_cwd, get_git_dir());

	trace_printf_key(&trace_setup_key,

			 "setup: move $GIT_DIR to '%s'",

			 path);

	set_git_dir_1(path);

	free(path);

}

void set_git_dir(const char *path, int make_realpath)

{

	struct strbuf realpath = STRBUF_INIT;

	if (make_realpath) {

		strbuf_realpath(&realpath, path, 1);

		path = realpath.buf;

	}

	set_git_dir_1(path);

	if (!is_absolute_path(path))

		chdir_notify_register(NULL, update_relative_gitdir, NULL);

	strbuf_release(&realpath);

}

const char *get_log_output_encoding(void)

{

	return git_log_output_encoding ? git_log_output_encoding

		: get_commit_output_encoding();

}

const char *get_commit_output_encoding(void)

{

	return git_commit_encoding ? git_commit_encoding : "UTF-8";

}

static int the_shared_repository = PERM_UMASK;

static int need_shared_repository_from_config = 1;

void set_shared_repository(int value)

{

	the_shared_repository = value;

	need_shared_repository_from_config = 0;

}

int get_shared_repository(void)

{

	if (need_shared_repository_from_config) {

		const char *var = "core.sharedrepository";

		const char *value;

		if (!git_config_get_value(var, &value))

			the_shared_repository = git_config_perm(var, value);

		need_shared_repository_from_config = 0;

	}

	return the_shared_repository;

}

void reset_shared_repository(void)

{

	need_shared_repository_from_config = 1;

}

int use_optional_locks(void)

{

	return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1);

}

int print_sha1_ellipsis(void)

{

	/*

	 * Determine if the calling environment contains the variable

	 * GIT_PRINT_SHA1_ELLIPSIS set to "yes".

	 */

	static int cached_result = -1; /* unknown */

	if (cached_result < 0) {

		const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS");

		cached_result = (v && !strcasecmp(v, "yes"));

	}

	return cached_result;

}