wg_to_hostname_if translates WireGuard configuration files to OpenBSD's hostname.if(5) format. Specifically, it deals with client configuration files. It also performs some validation to ensure that each option in each section is set to a reasonable value.

There is a file named test.ini in the tests directory. Here are its contents.

$ cat tests/test.ini
[Interface]
PrivateKey = yPlLc8Frd05JcfMBzs/p+53b5tfX29WhQbwuyJkdnEs=
Address = 192.168.1.23/32,fd12:3456:789a:1::1/128

[Peer]
PublicKey = YV1sIDB+wgwYqlgxAGnvo2h80v+r7Y5BgHKLoYwt2Xg=
AllowedIPs = 0.0.0.0/0,::0/0
Endpoint = 73.60.105.217:11507

These are the contents of that file translated to hostname.if format.

$ ./wg_to_hostname_if.py tests/test.ini
wgkey yPlLc8Frd05JcfMBzs/p+53b5tfX29WhQbwuyJkdnEs=
wgpeer YV1sIDB+wgwYqlgxAGnvo2h80v+r7Y5BgHKLoYwt2Xg= \
	wgendpoint 73.60.105.217 11507 \
	wgaip 0.0.0.0/0 \
	wgaip ::/0
inet 192.168.1.23/32
inet6 fd12:3456:789a:1::1/128

To run tests, execute this in the root of the project directory:

$ python3 -m pytest

You can use mandoc to read the manual page provided in the docs directory.

$ mandoc -l docs/wg_to_hostname_if.1

There is also a generated Markdown file in the same directory so you can read the man page on GitHub.