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Example Usage:
```nix
{ pkgs, ... }:
(pkgs.writeText "foo" "bar").overrideAttrs (_: {
meta.ci.extraSteps.bar = {
label = "testing soft_fail";
softFail = [
{ exit_status = 253; }
{ exit_status = 251; }
];
command = pkgs.writeShellScript "fail" ''
# Trigger a soft failure by exiting 253 or 251
exit 253
'';
};
})
```
Buildkite Documentation: https://buildkite.com/changelog/56-command-steps-can-now-be-made-to-soft-fail
Change-Id: Idfce15a8d9cde568aa24ebd03956ada399bba5d2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7076
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
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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>
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We're getting close to the finish line, folks.
I went through the list of builtins and there are only 33 that
remain unimplemented. I've marked them, and indicated which are
ready to be implemented vs which are waiting for other things.
We can delete this column from the table once everything is
implemented.
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: Idfaef93283536288b12e59aef5c3e1cd139bd133
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7140
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
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I believe that the currentTime, findFile, hashFile, pathExists,
readDir, path (unless ?sha256), and readFile builtins are impure.
This commit marks them as such in docs/builtins.md.
Change-Id: Ib1b59fe643dde73cb2b00050b4ef9d3401ad22eb
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7139
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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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>
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This is a bit tricky because the comparator can throw errors, so we
need to propagate them out if they exist and try to avoid sorting
forever by returning a reasonable ordering in this case (as
short-circuiting is not available).
Co-Authored-By: Vincent Ambo <tazjin@tvl.su>
Change-Id: Icae1d30f43ec1ae64b2ba51e73ee467605686792
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7072
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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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
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CL/7034 looks great, except that for a length-N target string it
will perform N deep copies of each of the from and to-lists. Let's
use references instead of clones.
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: Icd341213a9f0e728f9c8453cec6d23af5e1dea91
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7095
Reviewed-by: wpcarro <wpcarro@gmail.com>
Reviewed-by: j4m3s <james.landrein@gmail.com>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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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
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I assumed that AttrsRep::KV represented attrsets with a single
attribute as a Key-Value pair. That is not the case. Let's warn
other people about this.
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: Ie3d2765fcc1ab705c153ab94ffe77bbd6d4ab39e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7093
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: I460230863de853ca5248733bc977d4780b216f36
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7096
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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:)
Change-Id: Ib6a5990551cb0c86d0fc7f9a4121e3a6613ec6a1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7125
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI
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Rustc uses wasm32-unknown-unknown, which is rejected by config.sub,
for wasm-in-the-browser environments. Rustc should be using
wasm32-unknown-none, which config.sub accepts. Hopefully the rustc
people will change their triple before stabilising this triple. In
the meantime, we fix it here in order to unbreak tvixbolt.
https://doc.rust-lang.org/beta/nightly-rustc/rustc_target/spec/wasm32_unknown_unknown/index.html
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: I941fd8d6f3db4e249901772fd79321ad88cd9cc6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7107
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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This commit contains two search-and-replace renames which are broken
out from I04131501029772f30e28da8281d864427685097f in order to
reduce the noise in that CL:
- `is_thunk -> is_suspended_thunk`, since there are now
OpThunkClosure and OpThunkSuspended
- `compile_lambda_or_thunk` -> `compile_lambda_or_suspension`
Change-Id: I7cc5bbb75ef6605e3428c7be27e812f41a10c127
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7037
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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CL/6867 added support for builtins.import, which required a cyclic
reference import->globals->builtins->import. This was implemented
using a RefCell, which makes it possible to mutate the builtins
during evaluation. The commit message for CL/6867 expressed a
desire to eliminate this possibility:
This opens up a potentially dangerous footgun in which we could
mutate the builtins at runtime leading to different compiler
invocations seeing different builtins, so it'd be nice to have
some kind of "finalised" status for them or some such, but I'm not
sure how to represent that atm.
This CL replaces the RefCell with Rc::new_cyclic(), making the
globals/builtins immutable once again. At VM runtime (once opcodes
start executing) everything is the same as before this CL, except
that the Rc<RefCell<>> introduced by CL/6867 is turned into an
rc::Weak<>.
The function passed to Rc::new_cyclic works very similarly to
overlays in nixpkgs: a function takes its own result as an argument.
However instead of laziness "breaking the cycle", Rust's
Rc::new_cyclic() instead uses an rc::Weak. This is done to prevent
memory leaks rather than divergence.
This CL also resolves the following TODO from CL/6867:
// TODO: encapsulate this import weirdness in builtins
The main disadvantage of this CL is the fact that the VM now must
ensure that it holds a strong reference to the globals while a
program is executing; failure to do so will cause a panic when the
weak reference in the builtins is upgrade()d.
In theory it should be possible to create strong reference cycles
the same way Rc::new_cyclic() creates weak cycles, but these cycles
would cause a permanent memory leak -- without either an rc::Weak or
RefCell there is no way to break the cycle. At some point we will
have to implement some form of cycle collection; whatever library we
choose for that purpose is likely to provide an "immutable strong
reference cycle" primitive similar to Rc::new_cyclic(), and we
should be able to simply drop it in.
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: I34bb5821628eb97e426bdb880b02e2097402adb7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7097
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
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Change-Id: I2010bd6e4600e9f1dd6e6af40e81ecbbb72c20d0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7054
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
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* //users/grfn/system/home/modules:
The MultiMC saga continues with:
> PolyMC has been removed from nixpkgs due to a hostile takeover
> by a rogue maintainer. The rest of the maintainers have made a
> fork which is packaged as 'prismlauncher'.
* //third_party/overlays:
Override tdlib to 1.8.7 while waiting for nixpkgs to catch up.
* //users/tazjin/finito:
Disable on CI temporarily as it has been broken by some change
in nixpkgs, now failing to compile a dependency.
Change-Id: Ide038a8d466bfdc19dc9016beb03ae4817939a2b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7066
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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Instead of waiting for nixpkgs to [update home-manager], we can track
the upstream repository directly (using master as a channel seems to
be common practice) and overlay the up to date source into our nixpkgs
instance.
For //users/tazjin/home and //users/wpcarro/nixos/marcus, we need to
set `home.stateVersion`, since the default value for this option was
removed some time this summer.
[update home-manager]: https://github.com/NixOS/nixpkgs/issues/197907
Change-Id: I8c153fb7d3b55a4040652a5d619761b640119105
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7098
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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Change-Id: Iaf21baa512c4ef3f9c6e56745ae524f9a943f5f5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7106
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: ezemtsov <eugene.zemtsov@gmail.com>
Tested-by: BuildkiteCI
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Change-Id: I77cd2686891a166860d6720930743667e667043e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7105
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: ezemtsov <eugene.zemtsov@gmail.com>
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* add an explicit `tvix` node to track who arrived here through
Tvix-related means
* remove nodes that aren't actually relevant or informative for how
people got to TVL (e.g. `anon1` or `lgbtslack`).
* remove some people that have been missing for a long time and are
probably not coming back
Change-Id: I110180daa3c3c8f48593000b9e8d7cd4cf32b741
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7104
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: ezemtsov <eugene.zemtsov@gmail.com>
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See blog post
Change-Id: I4b7dcdc85e5125876441b2f157e3d6ddc3cd3140
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7103
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
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Another note to Future Me
Change-Id: Icf2edbbc6118b2b689ff403c38e91a69089a27a2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7099
Reviewed-by: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI
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Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: I5d58ba2eb756c981ab86f741888024822ab65da6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7100
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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Change-Id: Ibd8dfe38b5863fd2a02aa20558089f059c1cb1b5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7102
Autosubmit: j4m3s <james.landrein@gmail.com>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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Much less painful
Change-Id: I77f1220979d3ab2b2a4c45c7d0018b92df84fee1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7101
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI
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This adds a comment noting that StackIdx is an offset relative to
the base of the current CallFrame, whereas UpvalueIdx is an absolute
index into the upvalues array.
It also removes the confusing mention of StackIdx in the descriptive
comment for LocalIdx. They index into totally different structures;
one exists at runtime and the other exists at compile time.
Change-Id: Ib932b1b0679734c15001e8c5c95a08293fa016b4
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7017
Reviewed-by: grfn <grfn@gws.fyi>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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This adds a function NixList::force_elements() which forces each
element of the list shallowly. This behavior is needed for
`builtins.replaceStrings`, and probably a few other builtins as
well.
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: I3f0681acbbfe50e781b5f07b6a441647f5e6f8da
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7094
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
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Unfortunately we have to mangle test case filenames into rust-valid
symbols, since test-generator doesn't use `r#"..."` (deliberately?).
This means that when a test fails, there's nothing on the console
you can copy-and-paste in order to view/edit the code of the failing
test case.
This commit (partially) fixes it by including the unmangled name in
the panic!() string. However failures due to panic!()s inside the
vm (including deliberate panics due to panic!()-debugging) still
won't display an unmangled filename.
Maybe we should reconsider the use of test-generator?
Change-Id: I2208a859ffab1264f17f48fd303ff5e19675967e
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7092
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
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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>
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Support an array that dynamically resizes itself, and replace usages of `List`,
`Array`, and `Queue` with `Vec`.
Change-Id: I910b140b7c1bdddae40e08f8191986dccbc6fddf
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7080
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
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```
repl> "Hello, world"
String
repl> (fn x "testing")
a0 -> String
```
Change-Id: Ia76299a56aa4d2032c9a21277e2fddfb2e055831
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7079
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
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Define `debug.ml` and `prettify.ml` to clean-up some code.
Change-Id: Iee2e1ed666f2ccb5e56cc50054ca85b8ba513f3b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7078
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
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I've been wanting to grok Haskell-style type inference for awhile, so instead of
just watching conference talks and reading papers about it, I've decided to
attempt to implement it to more readily test my understanding of it.
Change-Id: I69261202a3d74d55c6e38763d7ddfec73c392465
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6988
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
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Rather than implementing all of the interesting semantics of value
comparison with a macro bound to the VM, implement the bulk of the logic
with a method on Value itself that returns an Ordering, and then use the
macro to implement the comparison against that Ordering. This has no
functional change, but paves the way to implementing lexicographic
comparison of list values, which is supported in the latest version of
upstream nix.
Change-Id: I8af1a020b41577021af5939f5edc160c407d4a9e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7069
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
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I played around a little bit with doing this in-place, but ended up
going with this perhaps slightly clone-heavy approach for now because
ideally most clones on Value are cheap - but later we should benchmark
alternate approaches that get to reuse allocations better if necessary
or possible.
Change-Id: If998eb2056cedefdf2fb480b0568ac8329ccfc44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7068
Autosubmit: grfn <grfn@gws.fyi>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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The last bump in langVersion (5->6) in C++ Nix was due to making lists
comparable (commit `09471d2680292af48b2788108de56a8da755d661`), which
we support in Tvix with cl/7070.
Change-Id: Id3beed5150b8fb6e0a46a4d1b7e3942022a65346
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7074
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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This commit implements builtins.currentSystem, by capturing the
cargo environment variable `TARGET` and exposing it to rustc as
`TVIX_CURRENT_SYSTEM` so it can be inserted into the source code
using `env!()`.
The resulting value needs to be massaged a bit, since it is an "LLVM
triple". The current code should work for all the platforms for
which cppnix works (thanks qyliss for generating the list!). It
does *not* reject all of the triples that cppnix's configure.ac
rejects -- it is much more forgiving. We can tighten this up in a
future commit.
Signed-off-by: Adam Joseph <adam@westernsemico.com>
Change-Id: I947f504b2af5a7fee8cf0cb301421d2fc9174ce1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6986
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
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Change-Id: I3e0aa017a7100cbeb86d2e5747471b36affcc102
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7038
Autosubmit: grfn <grfn@gws.fyi>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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Change-Id: Ia27be70ef07d9aa7d13821a2808ded9cf16506c8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7073
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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Since we push arguments onto a stack when calling multi-argument
functions, we actually were ending up calling `call_with` with the
arguments in the *reverse order* - we patched around this by passing the
arguments in the reverse order for `foldl'`, but it makes more sense to
have them just be the order that the function would be called with in
user surface code instead.
Change-Id: Ifddb98f46970ac89872383709c3ce758dc965c65
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7067
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
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When compiling a lambda, take the name of the outer slot (if
available) and store it as the name on the lambda.
These names are then shown in the observer, and nowhere else (so far).
It is of course common for these things to thread through many
different context levels (e.g. `f = a: b: c: ...`), in this setup only
the outermost closure or thunk gains the name, but it's better than
nothing.
Change-Id: I681ba74e624f2b9e7a147144a27acf364fe6ccc7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7065
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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Change-Id: I3898284bc4871e5483ead0c27e0f2832d66f2b29
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7061
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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There are some rare scope cases with deferred access where this
doesn't behave correctly otherwise.
Change-Id: I6c774f5e62c1cb50b598026c54727017a52cd22d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7064
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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The warning needs to consider whether it is occuring inside of a
thunk, i.e. the dynamic ancestry chain of lambda contexts must be
inspected and not just the current scope.
Change-Id: I5cf5482d67a8bbb9f03b0ecee7a62f58754f8e59
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7063
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
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This check is now actually simply equivalent to checking whether the
target has been initialised or not.
Change-Id: I30660d11073ba313358f3a64234a90ed81abf74c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7062
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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These are builtins which can be basically implemented as the identity
function from the perspective of pure evaluation, and which help us
get closer to evaluating nixpkgs.
For now, builtins added here will be "usable" and just emit a warning
about not being implemented yet.
Change-Id: I0fce94677f01c98c0392aeefb7ab353c7dc7ec82
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7060
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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Checking the computed depth and stack slot against the computed depth
and stack slot is equivalent to just checking the indices into the
locals vector against each other (i.e. "is the slot we're compiling
into the slot we're accessing?")
Change-Id: Ie85a68df073e3b2e3d9aba7fe8634c48eada81fc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7059
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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When capturing an upvalue, return a detailed TvixBug error that
contains metadata about what exactly was missing.
This particular thing helps with debugging some scope issues we still
seem to have.
Change-Id: I1089a1df4b3bbc63411a4907c3641a5dc3fad984
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7058
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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Using the same method as in Thunk::deep_force, detect cycles when
printing values by maintaining a set of already seen thunks.
With this, display of infinite values matches that of Nix:
> nix-instantiate --eval --strict -E 'let as = { x = 123; y = as; }; in as'
{ x = 123; y = { x = 123; y = <CYCLE>; }; }
> tvix-eval -E 'let as = { x = 123; y = as; }; in as'
=> { x = 123; y = { x = 123; y = <CYCLE>; }; } :: set
Change-Id: I007b918d5131d82c28884e46e46ff365ef691aa8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7056
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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