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Merge pull request #11322 from NixOS/eval-cache-doc

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doc: Manage expectations for eval-cache
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tomberek 2024-08-19 13:50:15 -04:00 committed by GitHub
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2
doc/manual/src/release-notes/rl-2.4.md
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@ -141,6 +141,8 @@ more than 2800 commits from 195 contributors since release 2.3.
the evaluation cache. This is made possible by the hermetic
evaluation model of flakes.
Intermediate results are not cached.
* The new `--offline` flag disables substituters and causes all
locally cached tarballs and repositories to be considered
up-to-date.

6
src/libexpr/eval-settings.hh
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@ -185,7 +185,11 @@ struct EvalSettings : Config
)"};
Setting<bool> useEvalCache{this, true, "eval-cache",
"Whether to use the flake evaluation cache."};
R"(
Whether to use the flake evaluation cache.
Certain commands won't have to evaluate when invoked for the second time with a particular version of a flake.
Intermediate results are not cached.
)"};
Setting<bool> ignoreExceptionsDuringTry{this, false, "ignore-try",
R"(