forked from lix-project/lix
Stabilize discard-references
It has been there for a few releases now (landed in 2.14.0), doesn't seem to cause any major issue and is wanted in a few places (https://github.com/NixOS/nix/pull/7087#issuecomment-1544471346).
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@ -320,16 +320,6 @@ Derivations can declare some infrequently used optional attributes.
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```
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```
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- [`unsafeDiscardReferences`]{#adv-attr-unsafeDiscardReferences}\
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- [`unsafeDiscardReferences`]{#adv-attr-unsafeDiscardReferences}\
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> **Warning**
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> This attribute is part of an [experimental feature](@docroot@/contributing/experimental-features.md).
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>
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> To use this attribute, you must enable the
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> [`discard-references`](@docroot@/contributing/experimental-features.md#xp-feature-discard-references) experimental feature.
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> For example, in [nix.conf](../command-ref/conf-file.md) you could add:
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>
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> ```
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> extra-experimental-features = discard-references
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> ```
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When using [structured attributes](#adv-attr-structuredAttrs), the
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When using [structured attributes](#adv-attr-structuredAttrs), the
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attribute `unsafeDiscardReferences` is an attribute set with a boolean value for each output name.
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attribute `unsafeDiscardReferences` is an attribute set with a boolean value for each output name.
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@ -10,3 +10,9 @@
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- [`builtins.toJSON`](@docroot@/language/builtins.md#builtins-parseFlakeRef) now prints [--show-trace](@docroot@/command-ref/conf-file.html#conf-show-trace) items for the path in which it finds an evaluation error.
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- [`builtins.toJSON`](@docroot@/language/builtins.md#builtins-parseFlakeRef) now prints [--show-trace](@docroot@/command-ref/conf-file.html#conf-show-trace) items for the path in which it finds an evaluation error.
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- Error messages regarding malformed input to [`derivation add`](@docroot@/command-ref/new-cli/nix3-derivation-add.md) are now clearer and more detailed.
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- Error messages regarding malformed input to [`derivation add`](@docroot@/command-ref/new-cli/nix3-derivation-add.md) are now clearer and more detailed.
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- The `discard-references` feature has been stabilized.
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This means that the
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[unsafeDiscardReferences](@docroot@/contributing/experimental-features.md#xp-feature-discard-references)
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attribute is no longer guarded by an experimental flag and can be used
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freely.
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@ -2307,7 +2307,6 @@ SingleDrvOutputs LocalDerivationGoal::registerOutputs()
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bool discardReferences = false;
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bool discardReferences = false;
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if (auto structuredAttrs = parsedDrv->getStructuredAttrs()) {
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if (auto structuredAttrs = parsedDrv->getStructuredAttrs()) {
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if (auto udr = get(*structuredAttrs, "unsafeDiscardReferences")) {
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if (auto udr = get(*structuredAttrs, "unsafeDiscardReferences")) {
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experimentalFeatureSettings.require(Xp::DiscardReferences);
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if (auto output = get(*udr, outputName)) {
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if (auto output = get(*udr, outputName)) {
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if (!output->is_boolean())
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if (!output->is_boolean())
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throw Error("attribute 'unsafeDiscardReferences.\"%s\"' of derivation '%s' must be a Boolean", outputName, drvPath.to_string());
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throw Error("attribute 'unsafeDiscardReferences.\"%s\"' of derivation '%s' must be a Boolean", outputName, drvPath.to_string());
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@ -12,7 +12,7 @@ struct ExperimentalFeatureDetails
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std::string_view description;
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std::string_view description;
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};
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};
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constexpr std::array<ExperimentalFeatureDetails, 15> xpFeatureDetails = {{
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constexpr std::array<ExperimentalFeatureDetails, 14> xpFeatureDetails = {{
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{
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{
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.tag = Xp::CaDerivations,
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.tag = Xp::CaDerivations,
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.name = "ca-derivations",
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.name = "ca-derivations",
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@ -182,15 +182,6 @@ constexpr std::array<ExperimentalFeatureDetails, 15> xpFeatureDetails = {{
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the [`use-cgroups`](#conf-use-cgroups) setting for details.
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the [`use-cgroups`](#conf-use-cgroups) setting for details.
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)",
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)",
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},
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},
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{
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.tag = Xp::DiscardReferences,
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.name = "discard-references",
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.description = R"(
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Allow the use of the [`unsafeDiscardReferences`](@docroot@/language/advanced-attributes.html#adv-attr-unsafeDiscardReferences) attribute in derivations
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that use [structured attributes](@docroot@/language/advanced-attributes.html#adv-attr-structuredAttrs). This disables scanning of outputs for
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runtime dependencies.
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)",
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},
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{
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{
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.tag = Xp::DaemonTrustOverride,
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.tag = Xp::DaemonTrustOverride,
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.name = "daemon-trust-override",
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.name = "daemon-trust-override",
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@ -27,7 +27,6 @@ enum struct ExperimentalFeature
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ReplFlake,
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ReplFlake,
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AutoAllocateUids,
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AutoAllocateUids,
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Cgroups,
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Cgroups,
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DiscardReferences,
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DaemonTrustOverride,
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DaemonTrustOverride,
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DynamicDerivations,
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DynamicDerivations,
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ParseTomlTimestamps,
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ParseTomlTimestamps,
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@ -42,8 +42,10 @@ nix-build -o $RESULT check-refs.nix -A test7
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nix-build -o $RESULT check-refs.nix -A test10
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nix-build -o $RESULT check-refs.nix -A test10
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if isDaemonNewer 2.12pre20230103; then
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if isDaemonNewer 2.12pre20230103; then
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enableFeatures discard-references
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if ! isDaemonNewer 2.16.0; then
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restartDaemon
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enableFeatures discard-references
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restartDaemon
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fi
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# test11 should succeed.
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# test11 should succeed.
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test11=$(nix-build -o $RESULT check-refs.nix -A test11)
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test11=$(nix-build -o $RESULT check-refs.nix -A test11)
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