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2023-06-22 r/6345 fix(tvix/serde): remove unnecessary dependency on genawaiterEvgeny Zemtsov2-6/+2
Change-Id: I52f13c6b508793603bc726353e9bf7d5f12fddf4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8850 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-06-22 r/6344 feat(tvix/eval): allow extending builtins outside of tvix_evalEvgeny Zemtsov2-0/+37
The change allows applications that use tvix_serde for parsing nix-based configuration to extend the language with domain-specific set of features. Change-Id: Ia86612308a167c456ecf03e93fe0fbae55b876a6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8848 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-06-22 r/6342 feat(tvix/serde): make from_str_with_config publicEvgeny Zemtsov1-0/+1
Change-Id: I61962297101d35ed02673edf1bca0584b7be37cf Reviewed-on: https://cl.tvl.fyi/c/depot/+/8845 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2023-06-20 r/6336 fix(tvix/eval): only finalise formal arguments if defaultingsterni1-1/+2
When dealing with a formal argument in a function argument pattern that has a default expression, there are two different things that can happen at runtime: Either we select its value from the passed attribute successfully or we need to use the default expression. Both of these may be thunks and both of these may need finalisers. However, in the former case this is taken care of elsewhere, the value will always be finalised already if necessary. In the latter case we may need to finalise the thunk resulting from the default expression. However, the thunk corresponding to the expression may never end up in the local's stack slot. Since finalisation goes by stack slot (and not constants), we need to prevent a case where we don't fall back to the default expression, but finalise anyways. Previously, we worked around this by making `OpFinalise` ignore non-thunks. Since finalisation of already evaluated thunks still crashed, the faulty compilation of function pattern arguments could still cause a crash. As a new approach, we reinstate the old behavior of `OpFinalise` to crash whenever encountering something that is either not a thunk or doesn't need finalisation. This can also help catching (similar) miscompilations in the future. To then prevent the crash, we need to track whether we have fallen back or not at runtime. This is done using an additional phantom on the stack that holds a new `FinaliseRequest` value. When it comes to finalisation we check this value and conditionally execute `OpFinalise` based on its value. Resolves b/261 and b/265 (partially). Change-Id: Ic04fb80ec671a2ba11fa645090769c335fb7f58b Reviewed-on: https://cl.tvl.fyi/c/depot/+/8705 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Autosubmit: sterni <sternenseemann@systemli.org>
2023-06-16 r/6325 test(tvix/serde): add a test for from_str_with_configVincent Ambo1-1/+12
Change-Id: I451851f4e01cb6dd0005e55bb852823b618f2ee6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8809 Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-06-16 r/6324 feat(tvix/serde): add a function to with custom configurationVincent Ambo1-1/+16
This adds a `from_str_with_config` function which takes a user-supplied closure that sets additional settings on the `tvix_eval::Evaluation`. Note that users can not set `strict = false`, but other settings are not restricted. This solves b/262. Change-Id: Ice184400b843cfbcaa5b6fe251ced12b6815e085 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8808 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-03-22 r/6037 feat(tvix/eval): add Evaluation::strict to toggle top-level deepseqVincent Ambo1-1/+2
This makes it possible for callers to control whether they can receive partially evaluated values from an evaluation or not. We're actually flipping the default behaviour to non-strict top-level evaluation, which means that callers have to set `strict = true` on the Evaluation to get the previous behaviour. Change-Id: Ic048e9ba09c88866d4c3177d5fa07db11c4eb20e Reviewed-on: https://cl.tvl.fyi/c/depot/+/8325 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2023-03-13 r/5979 fix(tvix/eval): implement cppnix JSON-serialisation semanticsVincent Ambo1-1/+2
This drops the usage of serde::Serialize, as the trait can not be used to implement the correct semantics (function colouring!). Instead, a manual JSON serialisation function is written which correctly handles toString, outPath and other similar weirdnesses. Unexpectedly, the eval-okay-tojson test from the C++ Nix test suite now passes, too. This fixes an issue where serialising data structures containing derivations to JSON would fail. Change-Id: I5c39e3d8356ee93a07eda481410f88610f6dd9f8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8209 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI
2023-01-31 r/5797 refactor(tvix/serde): allow dead_code in structFlorian Klink1-0/+1
This is an example, which uses the debug trait to print all field values. Silence the compiler warning about unused fields. Change-Id: I5f1216c77819003302e83ba1af1ff13c924f3b38 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7971 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de>
2023-01-31 r/5785 feat(tvix/serde): add an example application to the projectVincent Ambo3-0/+57
This shows how people can use tvix_serde to deserialise configuration structs for their programs from Nix code. Change-Id: I71bf4e03dce19dddafe67dd729b4e4b10719a739 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7945 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2023-01-04 r/5585 feat(tvix/serde): implement enum deserialisationVincent Ambo3-6/+188
Implements externally tagged enum deserialisation. Other serialisation methods are handled by serde internally using the existing methods. See the tests for examples. Change-Id: Ic4a9da3b5a32ddbb5918b1512e70c3ac5ce64f04 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7721 Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de>
2023-01-04 r/5584 feat(tvix/serde): add newtype & tuple deserialisationVincent Ambo2-10/+27
Only missing enums at this point, but they're a bit of a beast. Change-Id: I4ad47c034851f9a8794c81f39a5149a8ac1826e8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7716 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de> Autosubmit: tazjin <tazjin@tvl.su>
2023-01-03 r/5576 test(tvix/serde): add initial set of deserialisation testsVincent Ambo3-1/+86
Change-Id: I0a9779edf0296c25d37fb5f75f8fc5852fe00121 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7715 Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de>
2023-01-03 r/5575 feat(tvix/serde): handle nested data structuresVincent Ambo1-12/+55
Change-Id: I543fc05d31bbb9ad2edb887bce4510e9a1cdb102 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7714 Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de>
2023-01-02 r/5566 feat(tvix/serde): initial Nix->serde::Deserialize implVincent Ambo5-0/+444
This will make it possible fairly easily use Nix to represent arbitrary data structures, e.g. for using Nix as a config language. Only pure Nix (i.e. no `import` etc.) is supported for now. Not all types, specifically no struct traversal, are implemented in this commit. Change-Id: I9ac91a229a0d12bf818e6e3249f3e5a691599a2c Reviewed-on: https://cl.tvl.fyi/c/depot/+/7712 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
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