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 Initial Options in The GNU Emacs Manual.)
Here is a shell command to format all the files that end in .texinfo in the current directory:
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 texi2any
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.)