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Danylo Hlynskyi 60e8fcf0e5
module system: revert "remove types.optionSet", just deprecate (#56857)
The explicit remove helped to uncover some hidden uses of `optionSet`
in NixOps. However it makes life harder for end-users of NixOps - it will
be impossible to deploy 19.03 systems with old NixOps, but there is no
new release of NixOps with `optionSet` fixes.

Also, "deprecation" process isn't well defined. Even that `optionSet` was
declared "deprecated" for many years, it was never announced. Hence, I
leave "deprecation" announce. Then, 3 releases after announce,
we can announce removal of this feature.

This type has to be removed, not `throw`-ed in runtime, because it makes
some perfectly fine code to fail. For example:
```
$ nix-instantiate --eval -E '(import <nixpkgs/lib>).types' --strict
trace: `types.list` is deprecated; use `types.listOf` instead
error: types.optionSet is deprecated; use types.submodule instead
(use '--show-trace' to show detailed location information)
```
2019-03-07 21:28:09 +02:00
..
manual module system: revert "remove types.optionSet", just deprecate (#56857) 2019-03-07 21:28:09 +02:00
varlistentry-fixer.rb doc: Adds xml fixing script. (see previous and next commits) 2018-05-31 21:02:15 -04:00
xmlformat.conf doc: Adds rule to xmlformat to help keep spacing right. 2018-05-31 21:02:15 -04:00