sendto

#! /usr/bin/python3
import subprocess
import sys
from os.path import exists

GET_MAINTAINER_PATH = "./scripts/get_maintainer.pl"
if not exists(GET_MAINTAINER_PATH):
    raise Exception(f"Can't find {GET_MAINTAINER_PATH}, "
                    "are you in linux directory?")

argv = sys.argv
if len(argv) < 2:
    raise Exception("Usage: $ sendto <patch_file>")
if argv[1][-6:] != '.patch':
    raise Exception("Need .patch file (check arg)")
cmd = [f"{GET_MAINTAINER_PATH}", argv[1]]
try:
    result = subprocess.run(cmd,
                            stdout=subprocess.PIPE,
                            stderr=subprocess.PIPE)
except:
    print(f"subprocess.run failure... "
          "Potentially lacking permissions for {GET_MAINTAINER_PATH}")

get_maintainer_output = result.stdout.decode('UTF-8')
get_maintainer_errors = result.stderr.decode('UTF-8')
if len(get_maintainer_errors):
    raise Exception(f"error in {GET_MAINTAINER_PATH}, check patch file")

lines = []
for line in get_maintainer_output.split('\n')[:-1]:
    line = line.strip()
    idx_of_paren = line.index('(')
    before = line[0:idx_of_paren - 1]
    before = before.replace('"', '')
    after = line[idx_of_paren + 1:-1]
    lines.append((before, after))

TO = '--to '
CC = '--cc '
send_info = []
for (before, after) in lines:
    is_maintainer = ('maintainer' in after)
    res = (TO if is_maintainer else CC) + f'"{before}"'
    send_info.append(res)

warns = []
clean = " \\\n".join(send_info)
if '--to' not in clean and '--cc' not in clean:
    warns.append(f"No recipients, manually check {GET_MAINTAINER_PATH}")
elif '--to' not in clean:
    warns.append(f"Lack of --to, manually check {GET_MAINTAINER_PATH}")

output = \
f'''
git send-email \\
{clean} {argv[1]}

{''.join(f'# Warning: {warn}' for warn in warns)}
{get_maintainer_errors}
'''
print(output, end='')