Pipe output of commands into Emacs

ep

#!/usr/bin/env python

import sys
import subprocess

PIPE_BUFFER_NAME="*piped*"

def execute_command(c):
    cmd = ["/usr/bin/emacsclient", "-n", "-e", c]
    p = subprocess.Popen(cmd, stdout=subprocess.DEVNULL)
    p.wait()
    
execute_command('(switch-to-buffer (get-buffer-create "{}"))'.format(PIPE_BUFFER_NAME))

for i in sys.stdin:
    i = i.replace('"', '\\"')
    execute_command('(with-current-buffer "{}" (insert "{}"))'.format(PIPE_BUFFER_NAME, i))

Useful as a pager for git, when you are using git commands from shell-mode.