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#!/usr/bin/env python3
# Usage:
# _from=krebs state_dir=. python sed-plugin.py 'dick butt'
# _from=krebs state_dir=. python sed-plugin.py 's/t/l/g'
# > dick bull
import shelve
from os import environ
from os.path import join
from sys import argv
from time import sleep
import re
# try to open the shelve file until it succeeds
while True:
try:
d = shelve.open(
join(environ['state_dir'], 'sed-plugin.shelve'),
writeback=True
)
break
except: # noqa: E722
sleep(0.2)
usr = environ['_from']
def is_regex(line):
myre = re.compile(r'^s/(?:\\/|[^/])+/(?:\\/|[^/])*/[ig]?$')
return myre.match(line)
line = argv[1]
if is_regex(line):
last = d.get(usr, None)
if last:
from subprocess import Popen, PIPE
p = Popen(['sed', line], stdin=PIPE, stdout=PIPE, stderr=PIPE)
so, se = p.communicate(bytes("{}\n".format(last), "UTF-8"))
if p.returncode:
print("something went wrong when trying to process your regex: {}".format(line.strip()))
ret = so.decode()
if len(ret) > 512:
print('message to long, skipped')
elif len(ret.split('\n')) > 5:
print('to many lines, skipped')
else:
if last.strip() != ret.strip():
print("\x1b[1m{}\x1b[0m meant: {}".format(usr, ret.strip()))
if ret:
d[usr] = ret
else:
print("no last message")
else:
d[usr] = line
d.close()
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