Function tmp_objdir_create

tmp-objdir.c:135–184

}

struct tmp_objdir *tmp_objdir_create(struct repository *r,
				     const char *prefix)
{
	static int installed_handlers;
	struct tmp_objdir *t;

	if (the_tmp_objdir)
		BUG("only one tmp_objdir can be used at a time");

	t = xcalloc(1, sizeof(*t));
	t->repo = r;
	strbuf_init(&t->path, 0);
	strvec_init(&t->env);

	/*
	 * Use a string starting with tmp_ so that the builtin/prune.c code
	 * can recognize any stale objdirs left behind by a crash and delete
	 * them.
	 */
	strbuf_addf(&t->path, "%s/tmp_objdir-%s-XXXXXX",
		    repo_get_object_directory(r), prefix);

	if (!is_absolute_path(t->path.buf))
		chdir_notify_register(NULL, tmp_objdir_reparent, t);

	if (!mkdtemp(t->path.buf)) {
		/* free, not destroy, as we never touched the filesystem */
		tmp_objdir_free(t);
		return NULL;
	}

	the_tmp_objdir = t;
	if (!installed_handlers) {
		atexit(remove_tmp_objdir);
		installed_handlers++;
	}

	if (setup_tmp_objdir(t->path.buf)) {
		tmp_objdir_destroy(t);
		return NULL;
	}

	env_append(&t->env, ALTERNATE_DB_ENVIRONMENT,
		   absolute_path(repo_get_object_directory(r)));
	env_replace(&t->env, DB_ENVIRONMENT, absolute_path(t->path.buf));
	env_replace(&t->env, GIT_QUARANTINE_ENVIRONMENT,
		    absolute_path(t->path.buf));

	return t;
}

/*
 * Make sure we copy packfiles and their associated metafiles in the correct