You can format Texinfo files for Info using batch-texinfo-format
and Emacs Batch mode. You can run Emacs in Batch mode from any shell,
including a shell inside of Emacs. (See section `Command Line Switches and Arguments' in The GNU Emacs Manual.)
Here is the command to format all the files that end in `.texinfo' in the current directory (where `%' is the shell prompt):
% emacs -batch -funcall batch-texinfo-format *.texinfo
Emacs processes all the files listed on the command line, even if an error occurs while attempting to format some of them.
Run batch-texinfo-format only with Emacs in Batch mode as shown;
it is not interactive. It kills the Batch mode Emacs on completion.
batch-texinfo-format is convenient if you lack makeinfo
and want to format several Texinfo files at once. When you use Batch
mode, you create a new Emacs process. This frees your current Emacs, so
you can continue working in it. (When you run
texinfo-format-region or texinfo-format-buffer, you cannot
use that Emacs for anything else until the command finishes.)