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# Scadere
Scadere is a TLS certificate renewal reminder. It checks for certificates
that are about to expire and provides an Atom feed for notification.
## Usage
### Expiration checking
```console
$ scadere-check --help
Usage: scadere-check [-h] [-v] [-d DAYS] [-o PATH] HOST[:PORT]...
Check TLS certificate expiration of HOST, where PORT defaults to 443.
Options:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-d DAYS, --days=DAYS days before expiration (default to 7)
-o PATH, --output=PATH
output file (default to stdout)
```
It is recommended to run `scadere-check` as a cron job.
### Expiration notification
```console
$ scadere-listen --help
Usage: scadere-listen [-h] [-v] PATH URL [[HOST][:PORT]]
Serve at URL Atom feeds for TLS certificate renewal reminder.
It is possible for clients to filter domains
using one or more "domain" URL queries.
The certificate information is read from the file at PATH,
which is generated by scadere-check(1).
The server listens for TCP connections coming to HOST:PORT,
where HOST defaults to localhost and PORT is selected randomly
if not specified.
Options:
-h, --help show this help message and exit
-v, --version show program's version number and exit
```
## Hacking
Unit testing is done with [pytest], [pytest-asyncio],
[Hypothesis] and [trustme]. Since scadere itself does not depend
on any Python package, it is safe to be tested in-tree:
PYTHONPATH=src pytest
## Contributing
Issues should be reported to [chung@loa.loang.net][loang mailing list].
The mailing list also welcomes patches. Please maintain
a full branch [coverage] and keep the [hobgoblins][flake8] happy:
PYTHONPATH=src coverage run
coverage report
flake8
Patches should be sent using [`git send-email`][git send-email]
with the following configuration:
git config sendemail.to 'chung@loa.loang.net'
git config format.subjectPrefix 'PATCH scadere'
## Copying
Scadere is free software: you can redistribute and/or modify it
under the terms of the GNU [Affero General Public License][agpl]
version 3 or later.
[pytest]: https://docs.pytest.org
[pytest-asyncio]: https://pytest-asyncio.rtfd.io
[Hypothesis]: https://hypothesis.rtfd.io
[trustme]: https://trustme.rtfd.io
[loang mailing list]: https://loa.loang.net/chung
[coverage]: https://coverage.rtfd.io
[flake8]: https://flake8.pycqa.org
[git send-email]: https://git-send-email.io
[agpl]: https://www.gnu.org/licenses/agpl
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