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from pathlib import Path
import tomllib
import os
import requests
import subprocess
import sys
cfg_dir = Path.home() / ".config/zoner"
cfg_path = cfg_dir / "zoner.toml"
if not cfg_path.exists():
print(f"config file at {cfg_path} not found")
exit(1)
cfg = tomllib.loads(cfg_path.read_text())
class Record:
kind: str
name: str
value: str
ttl: int
meta: dict
def __init__(self, kind: str, name: str, value: str, ttl: int, **kwargs):
self.kind = kind
self.name = name
self.content = value
self.ttl = ttl
self.meta = kwargs
def __eq__(self, other: object):
if isinstance(other, Record):
return (
self.kind == other.kind
and self.name == other.name
and self.content == other.content
and self.ttl == other.ttl
)
else:
raise TypeError(f"cannot compare {type(self)} with {type(other)}")
def __str__(self):
return f"{self.kind}\t{self.name}\t{self.content}\t$ttl {self.ttl}"
def parse(filename: Path, domain: str):
text = filename.read_text()
while "\t\t" in text:
text = text.replace("\t\t", "\t")
rules = {"ttl": 3600}
for line in text.splitlines():
if line.startswith(";") or len(line) == 0: # comments and empty lines
continue
if line.startswith("$"): # rule line
update_rules(rules, line)
continue
# record line
line_rules = rules
segments = line.split("\t")
[name, kind, content, *opts] = segments
if len(opts) > 0: # line-scope rules
line_rules = line_rules.copy()
for statement in opts:
update_rules(line_rules, statement)
if name == "@":
recname = domain
else:
recname = f"{name}.{domain}"
yield Record(kind, recname, content, line_rules["ttl"], apiname=name)
def update_rules(rules: dict, statement: str):
[key, value] = statement.split(" ")
match key:
case "$ttl":
rules["ttl"] = int(value)
case _:
raise ValueError(f"invalid rule {key}")
def check_porkbun(resp: requests.Response):
if resp.status_code >= 400:
raise requests.HTTPError(
f"got code {resp.status_code}: {resp.json()}", response=resp
)
def retrieve(domain: str):
resp = requests.post(
f"https://porkbun.com/api/json/v3/dns/retrieve/{domain}",
json={"apikey": cfg["api_key"], "secretapikey": cfg["secret_key"]},
)
check_porkbun(resp)
for record in resp.json()["records"]:
if record["type"] == "NS":
continue
if record["type"] == "MX":
# add prioty to content
record["content"] = f"{record['prio']} {record['content']}"
if record["ttl"] == None:
record["ttl"] = 600
else:
record["ttl"] = int(record["ttl"])
yield Record(
record["type"],
record["name"],
record["content"],
record["ttl"],
id=record["id"],
)
def resolve(domain: str):
existing = list(retrieve(domain))
requested = list(parse(cfg_dir / f"{domain}.zone", domain))
to_delete = []
to_create = []
for item in existing:
for check in requested:
if item == check:
break
else:
to_delete.append(item)
for item in requested:
for check in existing:
if item == check:
break
else:
to_create.append(item)
return (to_delete, to_create)
def balance(domain: str):
to_delete, to_create = resolve(domain)
if len(to_delete) != 0:
print("to delete:")
for record in to_delete:
print(record)
print()
if len(to_create) != 0:
print("to create:")
for record in to_create:
print(record)
print()
if len(to_delete) == 0 and len(to_create) == 0:
print("nothing to do")
exit()
ch = input("continue? [y/N] ")
if ch != "y":
exit()
for record in to_delete:
print(f"delete {record}")
resp = requests.post(
f"https://porkbun.com/api/json/v3/dns/delete/{domain}/{record.meta['id']}",
json={"apikey": cfg["api_key"], "secretapikey": cfg["secret_key"]},
)
check_porkbun(resp)
for record in to_create:
print(f"create {record}")
content = record.content
prio = None
if record.kind == "MX":
prio, content = content.split(" ")
resp = requests.post(
f"https://porkbun.com/api/json/v3/dns/create/{domain}",
json={
"apikey": cfg["api_key"],
"secretapikey": cfg["secret_key"],
"name": record.meta["apiname"],
"type": record.kind,
"content": content,
"ttl": str(record.ttl),
"prio": prio,
},
)
check_porkbun(resp)
changes = set()
for entry in to_create:
changes.add(f"create {entry.kind} {entry.name}")
for entry in to_delete:
changes.add(f"delete {entry.kind} {entry.name}")
return list(changes)
def git_update(domain: str):
subprocess.check_call(["git", "add", f"{domain}.zone"], cwd=cfg_dir)
if len(subprocess.check_output(["git", "diff", "--cached"], cwd=cfg_dir)) > 0:
subprocess.check_call(["git", "commit", "-m", f"update {domain}"], cwd=cfg_dir)
subprocess.check_call(["git", "push"], cwd=cfg_dir)
def main():
if (cfg_dir / ".git").exists():
subprocess.check_call(["git", "pull"], cwd=cfg_dir, stdout=subprocess.PIPE)
if len(sys.argv) == 1: # selector
names = map(lambda path: path.name[:-5], cfg_dir.glob("*.zone"))
ret = subprocess.run(
["fzf"], input="\n".join(names).encode(), stdout=subprocess.PIPE
)
if ret.returncode != 0:
return
domain = ret.stdout.decode().strip()
else:
domain = sys.argv[1]
subprocess.run([os.environ["EDITOR"], (cfg_dir / f"{domain}.zone").as_posix()])
changes = balance(domain)
if (cfg_dir / ".git").exists():
git_update(domain)
if (cfg_dir / "hook").exists():
args = []
subprocess.check_call(
[
(cfg_dir / "hook").as_posix(),
*changes,
]
)
if __name__ == "__main__":
main()
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