/*
 * 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"

char git_default_email[MAX_GITNAME];
char git_default_name[MAX_GITNAME];
int trust_executable_bit = 1;
int assume_unchanged = 0;
int prefer_symlink_refs = 0;
int log_all_ref_updates = 0;
int warn_ambiguous_refs = 1;
int repository_format_version = 0;
char git_commit_encoding[MAX_ENCODING_LENGTH] = "utf-8";
int shared_repository = PERM_UMASK;
const char *apply_default_whitespace = NULL;

static int dyn_git_object_dir, dyn_git_index_file, dyn_git_graft_file;
static char *git_dir, *git_object_dir, *git_index_file, *git_refs_dir,
	*git_graft_file;

void setup_git(char *new_git_dir, char *new_git_object_dir,
               char *new_git_index_file, char *new_git_graft_file)
{
	git_dir = new_git_dir;
	if (!git_dir)
		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;

	if (dyn_git_object_dir)
		free(git_object_dir);
	git_object_dir = new_git_object_dir;
	if (!git_object_dir) {
		git_object_dir = xmalloc(strlen(git_dir) + 9);
		sprintf(git_object_dir, "%s/objects", git_dir);
		dyn_git_object_dir = 1;
	} else {
		dyn_git_object_dir = 0;
	}

	if (git_refs_dir)
		free(git_refs_dir);
	git_refs_dir = xmalloc(strlen(git_dir) + 6);
	sprintf(git_refs_dir, "%s/refs", git_dir);

	if (dyn_git_index_file)
		free(git_index_file);
	git_index_file = new_git_index_file;
	if (!git_index_file) {
		git_index_file = xmalloc(strlen(git_dir) + 7);
		sprintf(git_index_file, "%s/index", git_dir);
		dyn_git_index_file = 1;
	} else {
		dyn_git_index_file = 0;
	}

	if (dyn_git_graft_file)
		free(git_graft_file);
	git_graft_file = new_git_graft_file;
	if (!git_graft_file) {
		git_graft_file = strdup(git_path("info/grafts"));
		dyn_git_graft_file = 1;
	} else {
		dyn_git_graft_file = 0;
	}
}

static void setup_git_env(void)
{
	setup_git(getenv(GIT_DIR_ENVIRONMENT),
	          getenv(DB_ENVIRONMENT),
	          getenv(INDEX_ENVIRONMENT),
	          getenv(GRAFT_ENVIRONMENT));
}

char *get_git_dir(void)
{
	if (!git_dir)
		setup_git_env();
	return git_dir;
}

char *get_object_directory(void)
{
	if (!git_object_dir)
		setup_git_env();
	return git_object_dir;
}

char *get_refs_directory(void)
{
	if (!git_refs_dir)
		setup_git_env();
	return git_refs_dir;
}

char *get_index_file(void)
{
	if (!git_index_file)
		setup_git_env();
	return git_index_file;
}

char *get_graft_file(void)
{
	if (!git_graft_file)
		setup_git_env();
	return git_graft_file;
}