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Make experimental-features a proper type

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Rather than having them plain strings scattered through the whole
codebase, create an enum containing all the known experimental features.

This means that
- Nix can now `warn` when an unkwown experimental feature is passed
  (making it much nicer to spot typos and spot deprecated features)
- It’s now easy to remove a feature altogether (once the feature isn’t
  experimental anymore or is dropped) by just removing the field for the
  enum and letting the compiler point us to all the now invalid usages
  of it.
This commit is contained in:
regnat 2021-10-25 15:53:01 +02:00
parent 4a2b7cc68c
commit af99941279
28 changed files with 188 additions and 61 deletions
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2
src/libstore/daemon.cc
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@ -230,7 +230,7 @@ struct ClientSettings
else if (name == settings.experimentalFeatures.name) {
// We don’t want to forward the experimental features to
// the daemon, as that could cause some pretty weird stuff
if (tokenizeString<Strings>(value) != settings.experimentalFeatures.get())
if (parseFeatures(tokenizeString<StringSet>(value)) != settings.experimentalFeatures.get())
debug("Ignoring the client-specified experimental features");
}
else if (trusted