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2023-06-07 r/6243 fix(tvix/eval): type check function argument with set patternsterni1-0/+2
C++ Nix forces and typechecks the passed argument even if it is not necessary in order to compute the return value of the function. I discovered this when I thought our formals miscompilation might be that we are too strict, but doesn't look like it in this case. Change-Id: Ifb3c92592293052c489d1e3ae8c7c54e4b6b4dc6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8701 Tested-by: BuildkiteCI Autosubmit: sterni <sternenseemann@systemli.org> Reviewed-by: tazjin <tazjin@tvl.su>
2023-05-26 r/6207 fix(tvix): don't call function eagerly in genList, map & mapAttrssterni2-0/+32
mapAttrs, map and genList call Nix functions provided by the caller and store the result of applying them in a Nix data structure that does not force all of its contents when forced itself. This means that when such a builtin application is forced, the Nix function calls performed by the builtin should not be forced: They may be forced later, but it is also possible that they will never be forced, e.g. in builtins.length (builtins.map (builtins.add 2) [ 1 2 3 ]) it is not necessary to compute a single application of builtins.add. Since request_call_with immediately performs the function call requested, Tvix would compute function applications unnecessarily before this change. Because this was not followed by a request_force, the impact of this was relatively low in Nix code (most functions return a new thunk after being applied), but it was enough to cause a lot of bogus builtins.trace applications when evaluating anything from `lib.modules`. The newly added test includes many cases where Tvix previously incorrectly applied a builtin, breaking a working expression. To fix this we add a new helper to construct a Thunk performing a function application at runtime from a function and argument given as `Value`s. This mimics the compiler's compile_apply(), but does itself not require a compiler, since the necessary Lambda can be constructed independently. I also looked into other builtins that call a Nix function to verify that they don't exhibit such a problem: - Many builtins immediately use the resulting value in a way that makes it necessary to compute all the function calls they do as soon as the outer builtin application is forced: * all * any * filter * groupBy * partition - concatMap needs to (shallowly) force the returned list for concatenation. - foldl' is strict in the application of `op` (I added a comment that makes this explicit). - genericClosure needs to (shallowly) force the resulting list and some keys of the attribute sets inside. Resolves b/272. Change-Id: I1fa53f744bcffc035da84c1f97ed25d146830446 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8651 Autosubmit: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2023-03-17 r/6022 fix(tvix/eval): use coerce_to_string in builtins.substringVincent Ambo2-0/+6
This actually uses coercion under the hood in C++ Nix. See the test for an example. Change-Id: Id56b364acf269225b6829d0b600e0222f8b3608d Reviewed-on: https://cl.tvl.fyi/c/depot/+/8322 Reviewed-by: andi <andi@notmuch.email> Tested-by: BuildkiteCI
2023-03-13 r/5977 fix(tvix/eval): handle toJSON on attribute sets with `outPath`Vincent Ambo4-0/+15
These are serialised as the serialisation of the value of that field. Change-Id: Ida51708b1f43ce09b0ec835f4e265918aa31dd09 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8205 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI
2023-03-13 r/5976 fix(tvix/eval): handle `__toString` when JSON-serialising attrsetsVincent Ambo4-0/+20
These must be serialised to a JSON string of the *result* of coercing the function application to a string. Change-Id: Ib7f49ccd950503ddbdbf99643cd59565e26b50da Reviewed-on: https://cl.tvl.fyi/c/depot/+/8204 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI
2023-03-13 r/5970 fix(tvix/eval): correctly thunk deferred formals accessVincent Ambo2-0/+7
Formals can be initialised with deferred default values (see the test cases), in which case they need an extra thunk to have something that can be finalised appropriately when the setup is done. Fixes: b/255 Change-Id: I380e3770be68eaa83ace96d450c7cead32dacc9f Reviewed-on: https://cl.tvl.fyi/c/depot/+/8196 Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz>
2023-03-13 r/5965 test(tvix/eval): add test for infinite recursion detectionVincent Ambo1-0/+1
Change-Id: Ief20544a44c3542fe40a5c09f81d0f064a346f44 Reviewed-on: https://cl.tvl.fyi/c/depot/+/8149 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz>
2023-01-31 r/5784 test(tvix/eval): add tests for internal formals dependenciesVincent Ambo4-0/+8
Formals can depend on each other when using another formal as a default value. This test ensures that the compiler's declaration and initialisation order of formals is consistent with what actually happens in the VM. Change-Id: Ibdabe262554e8066d67fac1ebc3b5a48ef626e18 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7948 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-25 r/5753 feat(tvix/eval): use lexical-core to format floatFlorian Klink2-2/+2
Apparently our naive implementation of float formatting, which simply used {:.5}, and trimmed trailing "0" strings not sufficient. It wrongly trimmed numbers with zeroes but no decimal point, like `10000` got trimmed to `1`. Nix uses `std::to_string` on the double, which according to https://en.cppreference.com/w/cpp/string/basic_string/to_string is equivalent to `std::sprintf(buf, "%f", value)`. https://en.cppreference.com/w/cpp/io/c/fprintf mentions this is treated like this: > Precision specifies the exact number of digits to appear after > the decimal point character. The default precision is 6. In the > alternative implementation decimal point character is written even if > no digits follow it. For infinity and not-a-number conversion style > see notes. This doesn't seem to be the case though, and Nix uses scientific notation in some cases. There's a whole bunch of strategies to determine which is a more compact notation, and which notation should be used for a given number. https://github.com/rust-lang/rust/issues/24556 provides some pointers into various rabbit holes for those interested. This gist seems to be that currently a different formatting is not exposed in rust directly, at least not for public consumption. There is the [lexical-core](https://github.com/Alexhuszagh/rust-lexical) crate though, which provides a way to format floats with various strategies and formats. Change our implementation of `TotalDisplay` for the `Value::Float` case to use that. We still need to do some post-processing, because Nix always adds the sign in scientific notation (and there's no way to configure lexical-core to do that), and lexical-core in some cases keeps the trailing zeros. Even with all that in place, there as a difference in `eval-okay- fromjson.nix` (from tvix-tests), which I couldn't get to work. I updated the fixture to a less problematic number. With this, the testsuite passes again, and does for the upcoming CL introducing builtins.fromTOML, and enabling the nix testsuite bits for it, too. Change-Id: Ie6fba5619e1d9fd7ce669a51594658b029057acc Reviewed-on: https://cl.tvl.fyi/c/depot/+/7922 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: tazjin <tazjin@tvl.su>
2023-01-23 r/5746 fix(tvix/eval): force functors before applying themVincent Ambo2-0/+8
call_value in the VM expects the callable to be forced when calling it, which was not the case for functors. Change-Id: Id55a2fe32a9573be42aef8669e268df519a989cd Reviewed-on: https://cl.tvl.fyi/c/depot/+/7909 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2023-01-17 r/5674 feat(tvix/eval): add builtins to builtinsVincent Ambo2-0/+2
This is a somewhat terrifying hack that enables us to support `builtins.builtins`, by running a "fake compilation" inside of a suspended native thunk that can resolve the weak pointer to the globals. With this implementation, the thunk at `builtins.builtins` actually resolves to the "real" `builtins` (verified with a new test). This is kind of ugly, and it's something users shouldn't use, but bubbling a warning out of this is difficult at the moment due to a little bit of trickery with how the spans in suspended native thunks work (they don't) (see b/237, b/238) Change-Id: I67d0e93246dd5b279c960aeda00402031aa12af3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7748 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-12 r/5652 feat(tvix/eval): implement builtins.toJSONVincent Ambo4-0/+22
Implements `Serialize` for `tvix_eval::Value`. Special care is taken with serialisation of attribute sets, and forcing of thunks. The tests should cover both cases well. Change-Id: I9bb135bacf6f87bc6bd0bd88cef0a42308e6c335 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7803 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su>
2023-01-10 r/5640 feat(tvix/eval): implement serde::Deserialize for ValueRyan Lahfa2-1/+2
Co-Authored-By: Vincent Ambo <tazjin@tvl.su> Change-Id: Ib6f7d1f4f4faac36b44f5f75cccc57bf912cf606 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7626 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2023-01-06 r/5602 feat(tvix/eval): implement initial compiler::optimiser moduleVincent Ambo2-0/+22
This optimiser can rewrite some expressions into more efficient forms, and warn users about those cases. As a proof-of-concept, only some simple boolean comparisons are supported for now. Change-Id: I7df561118cfbad281fc99523e859bc66e7a1adcb Reviewed-on: https://cl.tvl.fyi/c/depot/+/7766 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2023-01-06 r/5594 test(tvix/eval): add test for builtins paritysterni2-0/+36
This will eventually force us to have a base builtins set in common with C++ Nix, i.e. all 2.3 builtins except the controversial builtins.valueSize. Change-Id: I2c767f07d6a14711911658e87da9f18ede57a143 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7747 Autosubmit: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2023-01-04 r/5582 fix(tvix/eval): ' is allowed in nonfirst position in Nix identifierssterni2-0/+31
With this is_valid_nix_identifier should line up with the upstream lexer definition: ID [a-zA-Z\_][a-zA-Z0-9\_\'\-]* While we're working on this, add a simple test checking the various formatting rules. Interestingly, it would not be suitable as an identity test, since you have to write { "assert" = null; } in order to avoid an evaluation error, but C++ Nix is happy to print this as { assert = null; } – maybe should be considered to be a bug. Change-Id: I0a4e1ccb5033a80f3767fb8d1c4bba08d303c5d8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7744 Autosubmit: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-12-29 r/5541 refactor(tvix/eval): persistent, memory-sharing OrdMap for NixAttrsVincent Ambo1-5/+5
This uses the `im::OrdMap` for `NixAttrs` to enable sharing of memory between different iterations of a map. This slightly speeds up eval, but not significantly. Future work might include benchmarking whether using a `HashMap` and only ordering in cases where order is actually required would help. This switches to a fork of `im` that fixes some bugs with its OrdMap implementation. Change-Id: I2f6a5ff471b6d508c1e8a98b13f889f49c0d9537 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7676 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-12-15 r/5420 refactor(tvix): build Rust projects using crate2nixVincent Ambo1-0/+0
Introduces granular dependency builds using crate2nix, bootstrapped off the generated configuration from the newly introduced workspace (see cl/7533). This commit checks in the generated Cargo.nix file which can be regenerated with a parameterless invocation of `crate2nix generate` in `//tvix`. I tried generating this in IFD, but it turned out to be harder than what seemed worthwhile for now. In this setup, the various build targets for Rust projects end up being attributes of the imported `Cargo.nix` file at the `tvix.crates` attribute. These still lack configuration, however, which has been fixed in the various `default.nix` files of individual projects. Note that we (temporarily) lose the ability to build tvix-eval's benchmarks in CI. I haven't figured out what magic incantation summons them from the void again ... The `eval-okay-readDir` tests from both test suites have been disabled because they fail for unknown reasons when run in this new derivation. Somebody will have to debug it! Change-Id: I2014614ccb9c8951aedbd71df7966ca191a13695 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7538 Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2022-12-02 r/5374 test(tvix/eval): check inner forcing despite declaring pointersterni2-0/+12
Maybe counter-intuitively the inner elements of a list or the attribute values of an attribute set will be forced despite pointer equality (but only one layer deep). Change-Id: I485d96452fb56f5fb342d39039c9137725b33d3f Reviewed-on: https://cl.tvl.fyi/c/depot/+/7371 Reviewed-by: Adam Joseph <adam@westernsemico.com> Tested-by: BuildkiteCI
2022-12-02 r/5373 test(tvix/eval): add a test for repeated keys in listToAttrsVincent Ambo2-0/+14
This came up in the Nix Language channel today and I thought it warranted a test case. We did actually implement this correctly. Change-Id: I4b37c92d06eb6e3a7f59ea3d10af38f2b0a93d53 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7493 Reviewed-by: sterni <sternenseemann@systemli.org> Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-12-02 r/5369 test(tvix/eval): verify pointer equality checkssterni2-0/+47
Change-Id: I9baf2810fbd5b6ee8bfe10fce5b64801a35c1d67 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7369 Reviewed-by: tazjin <tazjin@tvl.su> Reviewed-by: Adam Joseph <adam@westernsemico.com> Tested-by: BuildkiteCI
2022-12-02 r/5368 test(tvix/eval): verify pointer equality in list comparisonssterni2-0/+7
Change-Id: I617d402c8ecc7aaf607c4bdcd58a06ebddb71fac Reviewed-on: https://cl.tvl.fyi/c/depot/+/7370 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: Adam Joseph <adam@westernsemico.com>
2022-11-26 r/5339 fix(tvix/eval): OpAdd must weakly stringify if either arg is stringAdam Joseph2-0/+8
Tests included. Change-Id: I7a4905d6103813373e383e2e8629c5fd243d6bca Reviewed-on: https://cl.tvl.fyi/c/depot/+/7377 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su> Autosubmit: Adam Joseph <adam@westernsemico.com>
2022-11-25 r/5310 test(tvix/eval): add eval-okay-closure-pointer-compareAdam Joseph2-0/+15
This test case checks two things: * A sanity check that "pointer equality for functions" means not just the lambda, but also the upvalues. * To be pointer-equal, it is not enough for the upvalues to be normal-form equal (i.e. `nix_eq()`-equal); the upvalues must be *pointer*-equal. The second part of the test case checks for this. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I4e59327a6f199b8212e97197b212e3c3934bb3f0 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7372 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-11-24 r/5308 test(tvix/eval): test limits of builtins.seq's forcingsterni2-2/+2
Change-Id: I6dfc9108220762ef3372cd2739e91d79c01a55e1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7366 Tested-by: BuildkiteCI Autosubmit: sterni <sternenseemann@systemli.org> Reviewed-by: tazjin <tazjin@tvl.su>
2022-11-04 r/5242 test(tvix/eval): add a test case for groupBy with thunksAdam Joseph2-0/+7
We have to be careful implementing `builtins.groupBy`, since the list may contain thunks, and tvix's to_xxx() functions do not work on thunks. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I182b6fc2d4296f864ed16744ef70b153e8e6978a Reviewed-on: https://cl.tvl.fyi/c/depot/+/7039 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-11-04 r/5241 fix(tvix/eval): quote keys which are not valid identifiersAdam Joseph2-0/+2
The impl Display for NixAttrs needs to wrap double quotes around any keys which are not valid Nix identifiers. This commit does that, and adds a test (which fails prior to this commit and passes after this commit). Change-Id: Ie31ce91e8637cb27073f23f115db81feefdc6424 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7084 Autosubmit: Adam Joseph <adam@westernsemico.com> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-31 r/5226 fix(tvix/eval): nix_eq() must recurseAdam Joseph2-0/+2
The current implementation of nix_eq will force one level of thunks and then switch to the (non-forcing) rust Eq::eq() method. This gives incorrect results for lists-of-thunks. This commit changes nix_eq() to be recursive. A regression test (which fails prior to this commit) is included. This fix also causes nix_tests/eval-okay-fromjson.nix to pass, so it is moved out of notyetpassing. Change-Id: I655fd7a5294208a7b39df8e2c3c12a8b9768292f Signed-off-by: Adam Joseph <adam@westernsemico.com> Reviewed-on: https://cl.tvl.fyi/c/depot/+/7142 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-29 r/5223 test(tvix/eval): builtins.sort must preserve order of equal elementssterni2-0/+8
Change-Id: I59a0756940d1e5360a2ab4e886cf0bc9af7b8901 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7133 Autosubmit: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-29 r/5221 feat(tvix/eval): Implement comparison for listsGriffin Smith2-0/+18
Lists are compared lexicographically in C++ nix as of [0], and our updated nix test suites depend on this. This implements comparison of list values in `Value::nix_cmp` using a very similar algorithm to what C++ does - similarly to there, this requires passing in the VM so we can force thunks in the list elements as we go. [0]: https://github.com/NixOS/nix/commit/09471d2680292af48b2788108de56a8da755d661# Change-Id: I5d8bb07f90647a1fec83f775243e21af856afbb1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7070 Autosubmit: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-10-28 r/5219 feat(tvix/eval): add builtins.replaceStringsJames Landrein2-0/+6
Change-Id: I93dcdaeb101364ee2273bcaeb19acb57cf6b9e7d Reviewed-on: https://cl.tvl.fyi/c/depot/+/7034 Autosubmit: j4m3s <james.landrein@gmail.com> Reviewed-by: Adam Joseph <adam@westernsemico.com> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-25 r/5198 feat(tvix/eval): add builtins.{floor,ceil}James Landrein4-0/+4
Change-Id: I4e6c4f96f6f5097a5c637eb3dbbd7bb8b34b7d52 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7032 Autosubmit: j4m3s <james.landrein@gmail.com> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su> Reviewed-by: grfn <grfn@gws.fyi>
2022-10-23 r/5185 test(tvix/eval): add a test case for nested sibling accessVincent Ambo2-0/+8
Change-Id: I3898284bc4871e5483ead0c27e0f2832d66f2b29 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7061 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-10-22 r/5176 test(tvix/eval): add a test for observing an infinite attribute setVincent Ambo2-0/+5
Note that this test (ironically) fails if the observer is used (e.g. with --trace-runtime), but that's a separate issue. Change-Id: I952eaeac8b5a7acce9c66cd4744ec570280748e7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7055 Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-10-22 r/5175 feat(tvix/eval): Implement builtins.deepSeqGriffin Smith3-0/+3
This is done via a new `deepForce` function on Value. Since values can be cyclical (for example, see the test-case), we need to do some extra work to avoid RefCell borrow errors if we ever hit a graph cycle: While deep-forcing values, we keep a set of thunks that we have already seen and avoid doing any work on the same thunk twice. The set is encapsulated in a separate type to stop potentially invalid pointers from leaking out. Finally, since deep_force is conceptually similar to `VM::force_for_output` (but more suited to usage in eval since it doesn't clone the values) this removes the latter, replacing it with the former. Co-Authored-By: Vincent Ambo <tazjin@tvl.su> Change-Id: Iefddefcf09fae3b6a4d161a5873febcff54b9157 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7000 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-22 r/5174 fix(tvix/eval): use top-level span for `force_with_output`Vincent Ambo2-0/+2
When forcing thunks in `force_with_output`, the call stack of the VM is actually empty (as the calls are synthetic and no longer part of the evaluation of the top-level expression). This means that Tvix crashed when constructing error spans for the `fallible` macro, as the assumption of there being an enclosing span was violated. To work around this, we instead pass the span for the whole top-level expression to force_for_output and set this as the span for the enclosing error chain. Existing output logic will already avoid printing the entire expression as an error span. This fixes b/213. Change-Id: I93978e0deaf5bcb0f47a6fa95b3f5bebef5bad4c Reviewed-on: https://cl.tvl.fyi/c/depot/+/7052 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-10-18 r/5156 fix(tvix/eval): wrap dynamic resolution in an extra thunkVincent Ambo3-1/+7
Without this change it was possible to cause situations (see the new test) in which a `with`-namespace was forced prematurely. Change-Id: I879ea7763b43edc693feace2c73c890d426fafd3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7031 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: Adam Joseph <adam@westernsemico.com>
2022-10-17 r/5155 feat(nix/eval): Implement builtins.functionArgsGriffin Smith2-0/+81
Now that we're tracking formals on Lambda this ends up being quite easy; we just pull them off of the Lambda for the argument closure and use them to construct the result attribute set. Change-Id: I811cb61ec34c6bef123a4043000b18c0e4ea0125 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7003 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-17 r/5154 feat(tvix/eval): Validate closed formalsGriffin Smith1-0/+1
Validate "closed formals" (formal parameters without an ellipsis) via a new ValidateClosedFormals op, which checks the arguments (in an attr set at the top of the stack) against the formal parameters on the Lambda in the current frame, and returns a new UnexpectedArgument error (including the span of the formals themselves!!) if any arguments aren't allowed Change-Id: Idcc47a59167a83be1832a6229f137d84e426c56c Reviewed-on: https://cl.tvl.fyi/c/depot/+/7002 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-17 r/5152 feat(tvix/eval): Implement builtins.seqGriffin Smith3-0/+3
Since we already have infra for forcing arguments to builtins, this ends up being almost *too* simple - we just return the second argument! Change-Id: I070d3d0b551c4dcdac095f67b31e22e0de90cbd7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6999 Reviewed-by: kanepyork <rikingcoding@gmail.com> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-16 r/5148 feat(tvix/eval): implement builtins.partitionJames Landrein2-0/+14
Change-Id: I8b591f3057c68c1542046fc5a771973f2238c9df Reviewed-on: https://cl.tvl.fyi/c/depot/+/7020 Autosubmit: j4m3s <james.landrein@gmail.com> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-16 r/5141 fix(tvix/eval): don't coerce variable name to stringsterni1-0/+1
Change-Id: I8aa878dee009901feb453c489ce37c12fa3a31a8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7026 Autosubmit: sterni <sternenseemann@systemli.org> Reviewed-by: Adam Joseph <adam@westernsemico.com> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-15 r/5137 feat(tvix/eval): Implement builtins.intersectAttrsGriffin Smith2-0/+4
Change-Id: Iaba9bcfa19f283cd0c1931be2f211e2528a1a940 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6998 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su> Reviewed-by: kanepyork <rikingcoding@gmail.com>
2022-10-15 r/5136 feat(tvix/eval): Initial impl of builtins.matchGriffin Smith2-0/+30
Implement an *initial* version of builtins.match, using the rust `regex` crate for regular expressions. The rust regex crate definitely has different semantics than nix's regular expressions - but we'd like to see how far we can get before the incompatibility starts to matter. This consciously leaves out any sort of memo for compiled regular expressions (which upstream nix also has) for the sake of expediency - in the future we should implement that so we don't have to compile the same regular expression multiple times. Change-Id: I5b718635831ec83397940e417a9047c4342b6fa1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6989 Tested-by: BuildkiteCI Reviewed-by: Adam Joseph <adam@westernsemico.com> Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-15 r/5135 feat(tvix/eval): Implement builtins.fromJSONGriffin Smith4-0/+28
Using `serde_json` for parsing JSON here, plus an `impl FromJSON for Value`. The latter is primarily to stay "dependency light" for now - likely going with an actual serde `Deserialize` impl in the future is going to be way better as it allows saving significantly on intermediary allocations. Change-Id: I152a0448ff7c87cf7ebaac927c38912b99de1c18 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6920 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-15 r/5133 fix(tvix/eval): bring foldl' strictness in line with C++ Nixsterni5-0/+9
Working on https://github.com/NixOS/nix/pull/7158, I discovered that C++ Nix actually is strict in the accumulator, just not in the first value. This seems due to the fact that in the C++ evaluator, function calls don't seem to be thunked unconditionally and foldl' just elects not to wrap it in a thunk (don't quote me on this summary, even though it seems to line up with the code for primop_foldlStrict and testable behavior). It doesn't seem worth it to risk breaking the odd Nix expression just to be strict in one more value per invocation of foldl' (i.e. the initial accumulator value `nul`), so let's match the existing C++ Nix behavior here. Change-Id: If59e62271a90d97cb440f0ca72a58ec7840d1690 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7022 Autosubmit: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-15 r/5132 feat(tvix/eval): implement builtins.dirOfAdam Joseph2-0/+11
This commit causes the test eval-okay-builtins.nix to pass. It also adds tests/tvix_tests/eval-okay-dirof.nix which has better coverage than the nix tests for this builtin. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I71d96b48680696fd6e4fea3a9861742b35cfaa66 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6987 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-13 r/5125 feat(tvix/eval): implement builtins.baseNameOfAdam Joseph2-0/+11
This commit implements builtins.baseNameOf and adds a test case eval-okay-basenameof.nix to the test suite. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: Ib8bbafba2ac9ca0e1d3dc5e844167f94890d9fee Reviewed-on: https://cl.tvl.fyi/c/depot/+/6997 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-10-13 r/5124 fix(tvix/eval): parseDrvName should not coerce, and xfail testAdam Joseph1-0/+1
builtins.parseDrvName should not coerce its argument to a string. This commit fixes that oversight in my previous commit, and adds an xfail test to cover this condition. Thanks to @sterni for noticing this. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I76bc78f1a82e1e08fe5c787c563a221d55de2639 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6991 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-10-12 r/5115 test(tvix/eval): add eval-okay-parsedrvname.{exp,nix}Adam Joseph2-0/+13
Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I59254a0ac513b3d2a6b2184554358bb6eba2ba99 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6949 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
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