Problem: In #126 we made the `ignoreRefs` option required (to match the
other options). However, having it optional is better for
backwards-compatibility and to help users migrate to newer xrefcheck
versions.
Solution: Make all config options optional.
Problem: In #85, we added the `checkLocalhost` option to decide
whether to verify links to localhost. However, upon further
reflection, it seems like this could have been subsumed by the
existing `ignoreRefs` option instead.
Solution: Remove `check-localhost` CLI option and `checkLocalhost`
config option. Add a regex matching localhost links to the
`ignoreRefs` field of the default config.
Problem: we had a lot redundant dependencies and had no linter for handling obvious errors
Solution: hlint support and enable -Weverything flag, fix all hints from them, add hlint to the CI pipeline
Problem: Stack cannot build projects with mixins, and they only
used to splice universum instead of base.
Solution: Use `NoImplicitPreduce` and import `Universum`
everywhere explicitly.
Problem:
Currently we support only http and https links. If there is an `ftp://`
link, you will get exception.
Solution:
Use `ftp-client` to check connection to ftp, see response statuses and
check file existence. This produces adding new error types and small
refactoring.
Provide a test which is separate executable, where we have to pass CLA -
ftp host.
Co-authored-by: Alexander Bantyev <alexander.bantyev@serokell.io>
