Function diff_setup_done

diff.c:5244–5378

}

void diff_setup_done(struct diff_options *options)
{
	unsigned check_mask = DIFF_FORMAT_NAME |
			      DIFF_FORMAT_NAME_STATUS |
			      DIFF_FORMAT_CHECKDIFF |
			      DIFF_FORMAT_NO_OUTPUT;
	/*
	 * This must be signed because we're comparing against a potentially
	 * negative value.
	 */
	const int hexsz = the_hash_algo->hexsz;

	if (options->set_default)
		options->set_default(options);

	if (HAS_MULTI_BITS(options->output_format & check_mask))
		die(_("options '%s', '%s', '%s', and '%s' cannot be used together"),
			"--name-only", "--name-status", "--check", "-s");

	if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK))
		die(_("options '%s', '%s', and '%s' cannot be used together"),
			"-G", "-S", "--find-object");

	if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_G_REGEX_MASK))
		die(_("options '%s' and '%s' cannot be used together, use '%s' with '%s'"),
			"-G", "--pickaxe-regex", "--pickaxe-regex", "-S");

	if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_ALL_OBJFIND_MASK))
		die(_("options '%s' and '%s' cannot be used together, use '%s' with '%s' and '%s'"),
			"--pickaxe-all", "--find-object", "--pickaxe-all", "-G", "-S");

	/*
	 * Most of the time we can say "there are changes"
	 * only by checking if there are changed paths, but
	 * --ignore-whitespace* options force us to look
	 * inside contents.
	 */

	if ((options->xdl_opts & XDF_WHITESPACE_FLAGS) ||
	    options->ignore_regex_nr)
		options->flags.diff_from_contents = 1;
	else
		options->flags.diff_from_contents = 0;

	if (options->flags.find_copies_harder)
		options->detect_rename = DIFF_DETECT_COPY;

	if (!options->flags.relative_name)
		options->prefix = NULL;
	if (options->prefix)
		options->prefix_length = strlen(options->prefix);
	else
		options->prefix_length = 0;

	/*
	 * --name-only, --name-status, --checkdiff, and -s
	 * turn other output format off.
	 */