Basic tmux instrumentation through libtmux

This commit is contained in:
Théophile Bastian 2020-05-03 21:49:40 +02:00
parent 65bc6d3e8e
commit f5987d4048
3 changed files with 135 additions and 0 deletions

74
patch2vimedit/main.py Normal file
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import argparse
import pathlib
import os
import sys
import time
import patch
from tmux import TmuxSession
def parse_args():
""" Parse command-line arguments """
parser = argparse.ArgumentParser(prog="patch2vimedit")
parser.add_argument(
"-C",
"--directory",
metavar="DIR",
help="Change to DIR before performing any operations.",
)
parser.add_argument(
"patch",
help=(
"The patch file to be applied. If '-' is supplied, reads from STDIN "
"instead."
),
)
return parser.parse_args()
def get_patch(patch_path):
if patch_path == "-":
return patch.PatchSet(sys.stdin)
with open(patch_path, "rb") as stream:
return patch.PatchSet(stream)
def main():
""" Entry-point function """
args = parse_args()
if args.directory:
chdir_to = pathlib.Path(args.directory)
if not chdir_to.is_dir():
print(
(
"The required working directory '{}' does not exist, or is not a "
"directory."
).format(str(chdir_to)),
file=sys.stderr,
)
sys.exit(1)
os.chdir(chdir_to)
patchset = get_patch(args.patch)
tmux_session = TmuxSession.create_detached()
tmux_fg_process = tmux_session.process_attach(read_only=True)
time.sleep(0.2)
tmux_session.send_keys('echo "Hello, world!"', "enter")
time.sleep(1)
tmux_session.send_keys('echo "Bye, world!"', "enter")
time.sleep(1)
tmux_session.send_keys("exit", "enter")
tmux_fg_process.join(1)
if tmux_fg_process.exitcode is None: # Did not terminate -- kill it
tmux_fg_process.kill()
if tmux_session.session_exists():
tmux_session.session.kill_session()
if __name__ == "__main__":
main()

59
patch2vimedit/tmux.py Normal file
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import subprocess
import multiprocessing
import sys
import random
import libtmux
class TmuxSession:
""" A tmux session """
tmux_server = libtmux.Server()
def __init__(self, session):
self.session = session
self.session_id = session.id
@classmethod
def create_detached(cls, name=None):
""" Create a new detached tmux session, returning the TmuxSession """
if not name:
name = "patch2vimsession-{:04x}".format(random.randint(0, 1 << 16 - 1))
session = cls.tmux_server.new_session(session_name=name, attach=False)
return cls(session)
def attach(self):
""" Attach the tmux session to the current terminal. Does NOT return until the
tmux session ends or is detached. """
self.session.attach_session()
def attach_ro(self):
""" Same as `attach`, but attaches a tmux session in a read-only fashion (see
`tmux attach -r`). """
# libtmux is not expressive enough to avoid `subprocess` here...
subprocess.run(["tmux", "attach", "-r", "-t", self.session.id], check=True)
def session_exists(self):
""" Checks that the session exists """
return self.tmux_server.has_session(self.session_id)
def process_attach(self, read_only=True):
""" Runs `self.attach` in a `multiprocessing.Process` and returns the process.
"""
target = self.attach_ro if read_only else self.attach
process = multiprocessing.Process(target=target)
process.start()
return process
def send_keys(self, *args):
""" Send keys to the tmux process. See `man tmux` and `tmux send-keys` for
documentation """
for arg in args:
self.session.attached_pane.send_keys(
arg, suppress_history=False, enter=False
)
# subprocess.run(
# ["tmux", "send-keys", "-t", self.session.id] + list(args), check=True
# )

2
requirements.txt Normal file
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patch==1.*
libtmux==0.8.*