good chemistry is complicated,
and a little bit messy -LW
"If you have to run shell command from the text editor to format your code, why don't you run another one to save the file?.."
Perhaps a misunderstanding? But it is quite simple:
Alternatively you can run perltidy from the commandline. Then you must rename the resulting formatted file and reload the buffer (M-x revert-buffer).
IMHO applying the shell command (perltidy) on a region respectively running perltidy from within emacs is convinient - and the results look good.
The macro and the binding to F11:
Run it with F11 or M-x perltidy
OK, on a Mac F11 isn't a good idea :-(
Best regards, Karl
P.S.: BTW, i think, many stuff posted on PM is formatted with perltidy, from within emacs or vim. See also
«The Crux of the Biscuit is the Apostrophe»