Вот сценарий, который я сделал на работе, бросьте его в свою корзину, и вы можете использовать его, указав имя файла или вывод конвейера. Это предполагает Linux или Mac, поэтому функция os.isatty работает, но логика может работать где угодно:
демонстрация использования:
person@laptop ~ > head router.cfg
## Last commit: 2021-04-20 21:21:39 UTC by vit
version 15.1X12.2;
groups {
BACKBONE-PORT {
interfaces {
<*> {
mtu 9216;
unit <*> {
family inet {
mtu 9150;
person@laptop ~ > convert.py router.cfg | head
set groups BACKBONE-PORT interfaces <*> mtu 9216
set groups BACKBONE-PORT interfaces <*> unit <*> family inet mtu 9150
set groups BACKBONE-PORT interfaces <*> unit <*> family inet6 mtu 9150
set groups BACKBONE-PORT interfaces <*> unit <*> family mpls maximum-labels 5
<... output removed... >
конвертировать.py:
#!/usr/bin/env python3
# Class that attempts to parse out Juniper JSON into set format
# I think it works? still testing
#
# TODO:
# accumulate annotations and provide them as commands at the end. Will be weird as annotations have to be done after an edit command
from argparse import ArgumentParser, RawTextHelpFormatter
import sys, os, re
class TokenStack():
def __init__(self):
self._tokens = []
def push(self, token):
self._tokens.append(token)
def pop(self):
if not self._tokens:
return None
item = self._tokens[-1]
self._tokens = self._tokens[:-1]
return item
def peek(self):
if not self._tokens:
return None
return self._tokens[-1]
def __str__(self):
return " ".join(self._tokens)
def __repr__(self):
return " ".join(self._tokens)
def main():
# get file
a = ArgumentParser(prog="convert_jpr_json",
description="This program takes in Juniper style JSON (blah { format) and prints it in a copy pastable display set format",
epilog=f"Either supply with a filename or pipe config contents into this program and it'll print out the display set view.\nEx:\n{B}convert_jpr_json <FILENAME>\ncat <FILENAME> | convert_jpr_json{WHITE}",
formatter_class=RawTextHelpFormatter)
a.add_argument('file', help="juniper config in JSON format", nargs="?")
args = a.parse_args()
if not args.file and os.isatty(0):
a.print_help()
die("Please supply filename or provide piped input")
file_contents = None
if args.file:
try:
file_contents = open(args.file, "r").readlines()
except IOError as e:
die(f"Issue opening file {args.file}: {e}")
print(output_text)
else:
file_contents = sys.stdin.readlines()
tokens = TokenStack()
in_comment = False
new_config = []
for line_num, line in enumerate(file_contents):
if line.startswith("version ") or len(line) == 0:
continue
token = re.sub(r"^(.+?)#+[^\"]*$", r"\1", line.strip())
token = token.strip()
if (any(token.startswith(_) for _ in ["!", "#"])):
# annotations currently not supported
continue
if token.startswith("/*"):
# we're in a comment now until the next token (this will break if a multiline comment with # style { happens, but hopefully no-one is that dumb
in_comment = True
continue
if "inactive: " in token:
token = token.split("inactive: ")[1]
new_config.append(f"deactivate {tokens} {token}")
if token[-1] == "{":
in_comment = False
tokens.push(token.strip("{ "))
elif token[-1] == "}":
if not tokens.pop():
die("Invalid json supplied: unmatched closing } encountered on line " + f"{line_num}")
elif token[-1] == ";":
new_config.append(f"set {tokens} {token[:-1]}")
if tokens.peek():
print(tokens)
die("Unbalanced JSON: expected closing }, but encountered EOF")
print("\n".join(new_config))
def die(msg): print(f"\n{B}{RED}FATAL ERROR{WHITE}: {msg}"); exit(1)
RED = "\033[31m"; GREEN = "\033[32m"; YELLOW = "\033[33m"; B = "\033[1m"; WHITE = "\033[0m"
if __name__ == "__main__": main()
person
Aryeh Frankel
schedule
21.04.2021
