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refactor: Impure derivation type isPure -> isImpure

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To quote the method doc:

Non-impure derivations can still behave impurely, to the degree permitted
by the sandbox. Hence why this method isn't `isPure`: impure derivations
are not the negation of pure derivations. Purity can not be ascertained
except by rather heavy tools.
This commit is contained in:
Robert Hensing 2024-01-15 08:17:42 +01:00
parent f1b0304153
commit 49b25ea85c
4 changed files with 24 additions and 19 deletions
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13
src/libstore/derivations.hh
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@ -253,12 +253,17 @@ struct DerivationType {
bool isSandboxed() const;
/**
* Whether the derivation is expected to produce the same result
* every time, and therefore it only needs to be built once. This is
* only false for derivations that have the attribute '__impure =
* Whether the derivation is expected to produce a different result
* every time, and therefore it needs to be rebuilt every time. This is
* only true for derivations that have the attribute '__impure =
* true'.
*
* Non-impure derivations can still behave impurely, to the degree permitted
* by the sandbox. Hence why this method isn't `isPure`: impure derivations
* are not the negation of pure derivations. Purity can not be ascertained
* except by rather heavy tools.
*/
bool isPure() const;
bool isImpure() const;
/**
* Does the derivation knows its own output paths?