Commit graph

16684 commits

Author SHA1 Message Date
Evgeny Zemtsov
8fa3bc7137 feat(buildkite/mkPipeline): allow fast failure for build steps
This is supposed to help with resource wasting in situations when
multiple dynamic steps depend on a failing derivation. Cost of
failure currently is `C = T * D` where:
 - T -> time to compile the failing derivation
 - D -> amount of CI targets depending on a failing derivation

Switching to `Fail Fast` limits it to just T (time of a single
failure). Which helps a lot, especially while upgrading nixpkgs.

Fast fail at this moment is in preview, so to enable it:
 - Enable `Fail Fast` feature at pipeline or organization level
 - Set `cancelOnBuildFailing` parameter to true for `mkPipeline`

Change-Id: I4373a46633522d21e94cfa8bac35243b4eeb0b9c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6243
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2022-09-01 14:35:03 +00:00
Profpatsch
61a30555dd docs(users/Profpatsch/netencode): add docstrings to Netencode.hs
Change-Id: I509ea7949990e8c652133bd9ef21243a41f58e44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6202
Reviewed-by: Profpatsch <mail@profpatsch.de>
Autosubmit: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI
2022-09-01 14:23:48 +00:00
Vincent Ambo
16e9703f38 refactor(tvix/eval): use pretty_assertions for tests
This makes for much more readable output especially when long strings
are involved.

Change-Id: I43dd73a0480535d7181a760788c42883a9b083f8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6229
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-01 12:50:17 +00:00
Vincent Ambo
f153a163a6 refactor(tvix/eval): improve naming for locals manipulator methods
`push_local`/`push_phantom` were worse names because they sound like
the value itself is being pushed, where in actuality it is just being
declared to the compiler.

Change-Id: Ibfda5c4c8e47d5d3262bfe005b0f1f84908a117e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6228
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-01 12:50:17 +00:00
Vincent Ambo
0f739cd944 feat(tvix/eval): implement scope poisoning for true/false/null
These tokens are optionally parsed as identifiers by Nix, which means
that within any scopes that resolve them the compiler needs to track
whether they have been overridden to know whether to emit the literal
instructions or resolve a variable.

This is implemented by a new concept of "scope poisoning", where the
compiler's scope structure tracks whether or not any builtin
identifiers have been overridden.

Change-Id: I3ab711146e229f843f6e1f0343385382ee0aecb6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6227
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:42:48 +00:00
Vincent Ambo
0b51d63081 refactor(tvix/eval): simplify let ... in ... before recursion
While full recursion through thunking is not available, there are
actually incorrect behaviours introduced by declaring before
binding (example in the newly introduced test).

This commit simplifies the implementation to avoid this issue, and
also because I intend to explore a bit more how far we can get in non
left-to-right bindings *without* introducing thunks immediately.

Change-Id: I21fd3007ac3946570639772d7d624d70bd209958
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6226
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:42:48 +00:00
Vincent Ambo
75ba7c0120 test(tvix/eval): add basic tests for with expressions
Change-Id: I94664090e7a2b060dfbe21c1eeb859fb31e417b0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6225
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:42:48 +00:00
Vincent Ambo
0257f89917 chore(tvix/eval): return parse errors out of eval::interpret
Change-Id: I14f25b9c85260c68be38abf07ed80121ead60c7b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6224
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:42:48 +00:00
Vincent Ambo
89f566ef57 feat(tvix/eval): emit instructions for dynamic var resolution
If an unknown variable is encountered and the with stack is not empty,
emit instructions for resolving the variable at runtime.

Change-Id: I752f4bd0025335744e4747364abd1bd34130374e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6223
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:26:11 +00:00
Vincent Ambo
59f50dc81a feat(tvix/eval): Implement OpResolveWith instruction
Change-Id: I4d2a69f28a6b6199b3ff48ef81135e7da9fe1c3b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6222
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:26:11 +00:00
Vincent Ambo
911fb96eca feat(tvix/eval): add Value::as_attrs method
Change-Id: I2f39122ac85b67837335aab308d845907160e132
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6221
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:26:11 +00:00
Vincent Ambo
83e5f3b0d3 feat(tvix/eval): emit instructions to close with at scope end
Change-Id: I340b7a0964a4d4c5be58f46d00d2376ec5682517
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6220
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:26:11 +00:00
Vincent Ambo
19878c5fef feat(tvix/eval): implement OpPopWith
Change-Id: I752d9428a73f893741746e9d5b79e8d8d570bb81
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6219
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:26:11 +00:00
Vincent Ambo
5a497cdf1c feat(tvix/eval): implement with_stack in VM
Change-Id: I805c24c9a751ded15725ba9be651aa0869e013e5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6218
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:26:11 +00:00
Vincent Ambo
7cfdedfdfb feat(tvix/eval): compile with expression
Adds an additional structure to the compiler's scope to track the
runtime "with stack", i.e. the stack of values through which
identifiers should be dynamically resolved within a with-scope.

When encountering a `with` expression, the value from which the
bindings should be resolved is pushed onto the stack and tracked by
the compiler in the "with stack", as well as with a "phantom value"
which indicates that the stack contains an additional slot which is
not available to users via identifiers.

Runtime handling of this is not yet implemented.

Change-Id: I5e96fb55b6378e8e2a59c20c8518caa6df83da1c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6217
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-31 22:26:11 +00:00
Vincent Ambo
ec7db0235f refactor(tvix/eval): rename Locals to Scope
This name is much more sensible actually; its more than just a
collection of locals as it tracks additional scope information in the
case of Nix.

Change-Id: Ia2739bbd39aab222b1c4355e9248828973b0db43
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6216
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-31 22:10:40 +00:00
Vincent Ambo
f173161f4c feat(tvix/eval): implement inherit in let expressions
Note that at this point recursive bindings do not yet work in either
attrsets or let, so inheriting from the same scope is generally not
possible yet.

Change-Id: I6ca820d04b8ded5c22fb7ea18e2ec203bcaa8e9c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6215
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-31 22:10:40 +00:00
Vincent Ambo
8c1c9aee3c feat(tvix/eval): implement inherit in attribute set literals
Straightforward implementation, evaluating the elements of an inherit
and preparing the stack so that `OpAttrs` sees all relevant values
when constructing the attribute set itself.

The emitted instructions for inheriting a lot of values from the same
attribute set are inefficient, but it's too early to say whether this
actually matters.

Change-Id: Icb55a20936d4ef77173f34433811c5fa5d2c9ecc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6214
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-31 22:10:40 +00:00
Vincent Ambo
7db4f8d774 fix(tvix/eval): gently attempt to create state dir
If the directory in which REPL history is stored does not exist,
gently try to create it, but do not raise an error if it doesn't work.

We may want to warn about it, but in general this sort of
non-essential feature should not cause a hard failure.

Change-Id: If4fe8db0c7893c39627efe72c9cd9ebf7ed63f04
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6213
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-31 22:10:40 +00:00
sterni
049ec22943 feat(nix/buildLisp): re-enable CCL
The problem went away once again, let's see how long it'll last this time.

As it turns out, CCL has a Unicode Standard conforming string
implementation that doesn't allow the use of (lone) surrogate code
points, requiring us to disable a test in cl-json which tested the
behavior of en- and decoding of such a (technically illegal) string.

Change-Id: I8bfa482934bbf94f86cecdde02d5c3d4e77950a5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6204
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
2022-08-30 17:51:35 +00:00
Vincent Ambo
e07556493f feat(tvix/eval): Implement inherit from outer scope in attrs
Change-Id: I97fa45059b7f2cbe96eb60bd1821e3e25832df66
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6212
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
3a67f91228 fix(tvix/eval): ? operator should use OpAttrsOrNotFound
Using `OpAttrSelect`, the ? operator will fail when encountering a
nested value that is not an attribute set.

This however breaks valid code, such as:

  { bs = 42; } ? bs.a.b

The fix is simply to use the same operator used in the `or` statement,
which leaves a sentinal on the stack if a field is not found or the
value is not an attribute set.

Change-Id: Ib28fc8a96e6d592b4cdbc3e65ba129ad8faecd66
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6211
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
cfe37d36f7 fix(tvix/eval): or should handle non-attrset values, too
If a nested attrpath encounters a non-set value, the sentinel value
denoting a lack of next values should be emitted. This mirrors the
behaviour of Nix.

Change-Id: Ia80443d5a11243cc6d98dcab1249a3f5fdf77e27
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6210
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
76846fe220 fix(tvix/eval): allow use of ? operator on non-set types
Nix allows this, but always returns false. Tvix needs to do the same.

Change-Id: Ic9eec90834a0d0969eea5316d5c25032d3691d94
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6209
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
43658a5b90 fix(tvix/eval): emit correct count in OpAttrPath
Not sure how exactly this snuck in, but it caused some subtle
breakages in deeply nested attribute sets.

Change-Id: I8049ce912405d3750031f79cc8d86ff1c3c02c2b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6208
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
8d45fbadea docs(tvix/eval): Use correct syntax for module doc comments
Change-Id: I35741856f34b86a538f226a8eaf8806edede60ec
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6207
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
11ea7b82d8 chore(tvix/eval): minor readability improvement in attrs
Change-Id: If9d9eaf60934e96ec4b41c57818afe0c2a99c862
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6206
Reviewed-by: grfn <grfn@gws.fyi>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
de26894814 refactor(tvix/eval): remove Error::InvalidKeyType
We're confident that we're handling all branches that can reasonably
occur from valid AST, any other cases should be considered a critical
evaluator bug and panic rather than surfacing something that looks
like user error.

Change-Id: If96966eb32b8ff12fcaeb9ea3b0c8fc51b6abd11
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6205
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-30 17:13:27 +00:00
Vincent Ambo
ab9407bded fix(tvix/eval): address various clippy lints
Change-Id: I3ea0f51475e80948adfeb5d1620c1f2665cc39bc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6201
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-30 16:53:40 +00:00
Vincent Ambo
c4f73eecdc feat(tvix/eval): implement attribute set equality
Change-Id: Ia25f02610f2575e5e7fca81643e05b40f4a07820
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6200
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
2022-08-30 16:53:40 +00:00
Vincent Ambo
2ea71aa4c3 fix(tvix/eval): null in dynamic attribute keys skips the element
This is actually *tested* behaviour in C++ Nix, so we need to
implement it here, too.

Change-Id: Ic4a4659a2f04cdd928cbe78a85dae90401515371
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6199
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
2022-08-30 16:53:40 +00:00
Vincent Ambo
e041851581 feat(tvix/eval): implement chunk disassembler output
This makes for a much nicer view of an execution if `--feature
disassembler` is set, for example:

  tvix-repl> let value = [ 1 2 { a = 1; } ]; in value ++ [ 1 ]
  === compiled bytecode (11 operations) ===
  02   OpConstant(1)
  02   OpConstant(2)
  02   OpConstant("a")
  02   OpConstant(1)
  02   OpAttrs(1)
  02   OpList(3)
  02   OpGetLocal(0)
  02   OpConstant(1)
  02   OpList(1)
  02   OpConcat
  02   OpCloseScope(1)
  === runtime trace ===
  0001 OpConstant(ConstantIdx(0))  [ 1 ]
  0002 OpConstant(ConstantIdx(1))  [ 1 2 ]
  0003 OpConstant(ConstantIdx(2))  [ 1 2 "a" ]
  0004 OpConstant(ConstantIdx(3))  [ 1 2 "a" 1 ]
  0005 OpAttrs(1)                  [ 1 2 { a = 1; } ]
  0006 OpList(3)                   [ [ 1 2 { a = 1; } ] ]
  0007 OpGetLocal(0)               [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } ] ]
  0008 OpConstant(ConstantIdx(4))  [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } ] 1 ]
  0009 OpList(1)                   [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } ] [ 1 ] ]
  0010 OpConcat                    [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } 1 ] ]
  0011 OpCloseScope(1)             [ [ 1 2 { a = 1; } 1 ] ]
  => [ 1 2 { a = 1; } 1 ] :: list

Change-Id: If79c7fd1f0f18255ddb3763c1ba585fda8041b1b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6195
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-30 16:53:40 +00:00
Vincent Ambo
57d0dbb1c6 feat(tvix/eval): implement optional runtime tracing
This adds a `disassembler` feature to the crate configuration that
traces the operations executed and the state of the stack at runtime.

This can be enabled by compiling with `--feature disassembler`.

This will also gain a more sensible layout of code slices eventually.

Change-Id: I34c15e1cd346ecc4362b5afba6bf82dd49359d20
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6193
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-30 16:53:40 +00:00
sterni
dd0d624919 refactor(sterni/emacs): switch to pure gtk emacs
This means it'll no longer run under Xwayland. Requires applying small
fix to bqn-mode which stopped compiling with emacs HEAD.

Change-Id: I998a303a0b98bcd45c1de430462b1069bef8718e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6203
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-30 13:31:00 +00:00
Florian Klink
6c46ecd1c9 chore(tvix/nix_cli): add default.nix
This exposes tvix.nix_cli as a proper attribute to readTree, so it's
actually built by CI.

Change-Id: I3cef085bd872b61c5944270c8926727bf1fa705d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6083
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2022-08-30 11:03:48 +00:00
sterni
3f64e1fb04 chore(3p/sources): Bump channels & overlays
* //users/Profpatsch/writers: adjust for API change in
  makePythonWriter: Since it has become cross-aware, we also
  need to provide the buildPackages python set we want to use.

Change-Id: I4a201647281827ad983eb2dda6f6305f1ed824e7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6196
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: Profpatsch <mail@profpatsch.de>
2022-08-30 10:11:48 +00:00
Vincent Ambo
1cb1931406 feat(tvix/eval): emit warnings on useless inherit
Change-Id: Ifb9993cf8b85393eb43e1b204c7ab2f889b7113b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6194
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-29 20:13:26 +00:00
Vincent Ambo
ab12b0abff fix(tvix/eval): skip inherit with no explicit parent in let
Using `inherit` in a let-binding can not possibly have an effect, as
the given identifier is already bound exactly the same way in the
current scope.

This introduces a subtle bug that is fixed later on, as there
actually *is* a (single) condition where these inherits are
meaningful.

Change-Id: I8b24f0edcfe80db8153bb7e86cf478d36957d6f8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6192
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-29 20:13:26 +00:00
Vincent Ambo
36748fe4f6 test(tvix/eval): add basic tests for let expressions
Change-Id: I788504f0c1848a1422c99006bf659738df614716
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6191
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-29 20:13:26 +00:00
William Carroll
52f4915317 fix(wpcarro/emacs): Support rust.el PATH deps
There might be a better way to do this using `direnv`'s `use_nix` and shlevy's
`nix-buffer` Elisp package, but I'm doing this for now.

Change-Id: I4246c519f39eea1bde3191762b184b37d30fbeed
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6049
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
2022-08-29 16:47:47 +00:00
William Carroll
27c1763a7a feat(wpcarro/rust): Define stdin example
Pipe Rust strings to shell commands.

Change-Id: Id8afeed642d30c79e193fa9b353de081a5843eb5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6197
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI
2022-08-29 16:21:37 +00:00
Vincent Ambo
342b233a0a feat(tvix/eval): add local identifier access
This makes basic `let ... in ...` statements work correctly. It does
not yet account for the call frames pushed into the VM during function
application.

Change-Id: I67155171daf1a43011b96716dd9d1ab04b27db33
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6190
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-28 17:50:34 +00:00
Vincent Ambo
2d401a32e5 feat(tvix/eval): detect dynamic identifier names in let
Nix does not allow dynamic identifiers in let expressions (only in
attribute sets), but there are several different kinds of things it
considers static identifiers.

The functions introduced here put the path components of a let
expression into normalised (string) form, and surface an error about
dynamic keys if one is encountered.

Change-Id: Ia3ebd95c6f3ed3cd33b94e156930d2e9c39b6cbf
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6189
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-28 17:50:34 +00:00
Vincent Ambo
691a596aac feat(tvix/eval): compile simple let ... in ... expressions
These expressions now leave the binding values on the stack, and clean
up the scope after the body of the expression.

While variable access is not yet implemented (as the identifier node
remains unhandled), this already gives us the correct stack behaviour.

Change-Id: I138c20ace9c64502c94b2c0f99a6077cd912c00d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6188
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-28 17:50:34 +00:00
Vincent Ambo
bbad338017 feat(tvix/eval): prepare structures for simulating locals stack
These are going to be used during compilation of `let`-expressions to
determine stack offsets for local variables.

Change-Id: Ibb79f3f1ae86650303f88eacf623ae456458de87
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6187
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-08-28 17:50:34 +00:00
Vincent Ambo
de21d201ba fix(tvix/eval): use path_clean instead of fs::canonicalize for paths
Canonicalisation performs much more functionality than what C++ Nix
implements for paths, and causes some undesirable behaviour (e.g.
handling non-existant files becomes difficult, but should be possible
in literals).

Instead, the path_clean crate provides a pure normalisation method.

There is an intention to add this to Rust itself:
https://github.com/rust-lang/rfcs/issues/2208

Change-Id: I775d238136db0a52cf6b12a68985833c8fb32882
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6186
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-28 11:02:15 +00:00
Vincent Ambo
6fe5e2d752 feat(tvix/eval): resolve relative path literals
Resolves relative paths (e.g. `./foo`) either relative to the location
of the Nix file, or relative to the working directory if none is
supplied.

Change-Id: I70ec574657b221b458015117a004b6e4a9c25a30
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6185
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-28 11:02:15 +00:00
Vincent Ambo
1f8aad0ab4 refactor(tvix/eval): implement error variant for path resolution
There are multiple things that can theoretically fail while resolving
a path, as some of it includes I/O. A new error variant has been added
for this and appropriate errors have been introduced.

Change-Id: Ie222245425207dabbf203166eb5ed1eec0114483
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6184
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-28 11:02:15 +00:00
Vincent Ambo
e68b6d33b0 feat(tvix/eval): support absolute and home-anchored paths
These two paths are the easiest to handle, as they are simply built up
from the components supplied in the text node and then normalised.

Note that the normalisation of fs::canonicalize includes symlink
resolution, which Nix does not actually do. We will need to fix that
at some point.

Change-Id: I54158f0684f197dd2a2583f7d0982d54c7619993
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6183
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-28 11:02:15 +00:00
Vincent Ambo
bf10c35201 chore(tvix/eval): add variant_size_differences warning to Value
Change-Id: I2f4719a81512a9a970edf22390afed490125bda7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6182
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-27 09:27:13 +00:00