This isn't supported at all in emacs by default - or, if it is, I never figured out how. You can try my pmacs script to get something sort-of-like: https://git

This isn't supported at all in emacs by default - or, if it is, I never figured out how. You can try my pmacs script to get something sort-of-like: https://github.com/tom-seddon/bin/blob/master/pmacs.py https://github.com/tom-seddon/bin/blob/master/pmacs.py (not productized, and some self-assembly may be required - should work out of the box on Linux, though, and probably OS X too) Works pretty well, though only at the end of a pipeline. (It could probably be extended to work mid-pipeline though; you can get emacsclient to block until the file's buffer is closed in emacs - this is what the "-n" switch inhibits - giving the script a chance to wait, load the (presumably modified) file and print it to stdout.)