Commit graph

18090 commits

Author SHA1 Message Date
Florian Klink
c3750079f7 feat(ops/terraform): allow specifying an entrypoint for the attrset
This adds an additional parameter `entrypoint`, pointing to a .nix file
(or a directory containing a `default.nix` file) that's providing the
attribute path asked for.

If not set / kept at the default (empty string), it falls back to the
root dir of the repository as before.

Change-Id: I2e63114f21660c842153ac15424b3491d66624d2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8190
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
2023-03-03 14:53:43 +00:00
Vincent Ambo
344c119370 chore(tvix/eval): fix clippy warnings
Change-Id: I4c02f0104c455ac00a3f299c1fbf75cbb08e8972
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8142
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Autosubmit: tazjin <tazjin@tvl.su>
2023-03-03 11:01:52 +00:00
Vincent Ambo
7e9a65dcdb refactor(tvix/eval): remove useless map call
Change-Id: Ifb59ef148ea4fab613f2e4efb133c04baafa3a98
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8141
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2023-03-03 10:57:50 +00:00
Vincent Ambo
fb4c197b39 refactor(tvix/eval): enhance debug output for bytecode dumps
This adds addresses of thunk and closure chunks to the debug output
displayed when dumping bytecode.

This makes it possible to see in the dump which thunks are referenced
by constants in other thunks.

Change-Id: I2c98de5227e7cb415666cd3134c947a56979dc80
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8137
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-03-03 10:52:48 +00:00
Vincent Ambo
dbca46d052 feat(ops/terraform): add module for deploying NixOS system closures
This module makes it fairly easy to deploy NixOS system closures using
Terraform, while properly separating the evaluation of a
derivation (to determine whether a deploy is needed) from the building
and copying of the closure itself.

This has been on my stack for a while. It was originally developed for
Resoptima, who agreed to open-sourcing it in depot back when we
completed our work with them. Their contribution has been acknowledged
in the README.

Co-Authored-By: Florian Klink <flokli@flokli.de>
Change-Id: Ica4c170658cd25f1fb7072c9a45735fcc4351474
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7950
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-03-03 10:48:13 +00:00
sterni
0b64577702 chore(3p/sources): Bump channels & overlays
* //3p/sources: temporarily switch to nixos-unstable-small, since it
  includes:

  - evans update we are interested in, allowing us to drop our evans
    patches.
  - awscli2 update that unbreaks //users/grfn

* //3p/overlays/tvl:

  - drop evans patches
  - update tdlib to 1.8.11 to make tazjin's emacs happy
  - drop obsolete mullvad workaround

* //users/grfn/keyboard: disable -Werror for array-bounds warnings.
  Seems like a non-trivial job to resolve the warning properly,
  hopefully GCC 12 still generates the same working code as GCC 11 used
  to.

* //users/grfn/system/home: remove yubikey-manager-qt.
  Yubico can't seem to keep that on pace with yubikey-manager. It
  requires a <5 version of the latter which is incompatible with the
  recently released cryptography >= 39.

* //3p/gerrit: update changed FOD hash for the fetch step

Change-Id: I590ab996247e69b0ab5059cd173840ef4ebfe939
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8133
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2023-03-02 14:35:49 +00:00
Profpatsch
de3eedff9b chore(users/Profpatsch): remove failed aerc experiment
I didn’t ever get aerc to work, so let’s get rid of this.

Change-Id: Ie59b23fe7d5af70ca82c1c624c1e11d21da735f4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8189
Autosubmit: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: sterni <sternenseemann@systemli.org>
2023-03-01 14:01:54 +00:00
sterni
48dfb8de0c feat(sterni/edwin/code.sterni.lv): mirror vuizvui
Change-Id: I8b163614b588d1cfb8d758cafb8fb407397a1ef7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8188
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2023-03-01 13:45:59 +00:00
sterni
2ddd9e12a9 chore(sterni/external/likely-music): update to 2023-02-07
Includes a frontend bug fix and a closure size reduction of the server
application.

Change-Id: I5713a5348281acb7126c1fd85a637a6fff969c98
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8187
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
2023-03-01 13:40:55 +00:00
Vincent Ambo
44a5e14200 feat(nix/readTree): implement .skip-tree marker for subtree ignoring
With this change, readTree gains the ability to notice a `.skip-tree`
marker in addition to the `.skip-subtree` marker.

The behaviour of the new marker will completely ignore the folder that
the marker is located in (i.e. no node will be present for it in the
parent at all).

To make this work, the recursive function in readTree had to be
modified to return a sentinel value (noting that a tree has requested
to be skipped) which is then filtered out when constructing the list
of children. The actual `readTree` function is now a wrapper around
this inner, sentinel-yielding implementation which unwraps the result
set.

For obvious reasons, `.skip-tree` is not allowed at the top-level and
readTree will throw an error if it encounters it there.

Fixes: b/244
Change-Id: Ica731bc1af356e881fd3d31c7109f62ffd2762ea
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8185
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-02-28 12:15:33 +00:00
Griffin Smith
5134324a78 feat(grfn/emacs): Add capture template for work todo
Change-Id: If6e667a28619cd43d1135d6b0552bc09c5c038e8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8163
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: grfn <grfn@gws.fyi>
2023-02-27 15:18:47 +00:00
Griffin Smith
ffe77cbc9c feat(grfn/system): Install some rust profiling tools
Change-Id: I0d68c0c20b29ecd48b7c63c5a5498ccb7cc685fd
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8162
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2023-02-27 15:16:44 +00:00
Griffin Smith
c54c869778 chore(grfn/system): Upgrade emacs packages
Some interfaces changed in magit's transient, and doom switched more
emphatically to rustic mode

Change-Id: Ifb945f7fc693b0b7fb1739e25c6da70b06df96ef
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8161
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2023-02-27 15:16:43 +00:00
Aaqa Ishtyaq
0dcbf5dfb9 chore(tvix/cli): iter instead of into_iter for references
This CL removes calling into_iter on a reference, as it will
not move out it's content into resulting iterator.

Change-Id: Ifcc10b7cf33b98453570cbcec3eb82ffaba2ffcb
Signed-off-by: Aaqa Ishtyaq <aaqaishtyaq@gmail.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8126
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-16 22:42:14 +00:00
Aaqa Ishtyaq
faffb2a4cb refactor(tvix/eval): remove redundant clone
This CL removes redundant clone from value which is
going to be dropped without further use.

Change-Id: Ibd2a724853c5cfbf8ca40bf0b3adf0fab89b9be5
Signed-off-by: Aaqa Ishtyaq <aaqaishtyaq@gmail.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8125
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-16 22:42:14 +00:00
Vincent Ambo
bfe6cace5e docs(tvix/eval): add proposal for VM loop restructuring
Change-Id: Ib991d68724a73886a8343d7f785b5b3aedd637ed
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8103
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2023-02-16 22:23:51 +00:00
Vincent Ambo
006ab204fa feat(tazjin/generator-example): add an example for genawaiter crate
This is an experiment for tvix-eval.

Change-Id: Ic752b5b125cefefeb1343e38a70beb364478e6eb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8131
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2023-02-16 22:23:51 +00:00
Florian Klink
f2624f1028 refactor(tvix/store): remove needless borrow in build.rs
Change-Id: I2c2a70e5ffbb080702f57218aa9dcfe53d08870f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8110
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
2023-02-15 18:40:36 +00:00
Florian Klink
cb8466d417 refactor(tvix/store/proto): use .cloned()
Instead of using an explicit closure to clone elements, use .cloned().

Change-Id: I31f0f0bad2b4935e1a8d91fa0d14163c94182e1b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8109
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2023-02-15 18:40:34 +00:00
Florian Klink
cfa0755fc4 refactor(tvix/store): avoid casting to the same type
The size field already is u32, we don't need to convert here.

Change-Id: Ie29819aa2d1d8022e9bd73fcf05b140e45c967a9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8107
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-02-15 18:40:33 +00:00
Vincent Ambo
3c311ffab2 fix(tvix/eval): correctly print lambda address in observer
We want the address that the Rc is pointing to, not the address of the
Rc.

Change-Id: I8eba21677f242bbe4166c74d4aa4269c316076e3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8045
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-14 08:02:40 +00:00
Aaqa Ishtyaq
fc61dff037 chore(tvix/eval): use writeln for newline string
This CL address clippy warning which expects to
use `writeln` instead of `write` for strings with
new line.

Change-Id: Ia72a07502c60cfd489ecf1e3833b9d42d44a8b17
Signed-off-by: Aaqa Ishtyaq <aaqaishtyaq@gmail.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8030
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2023-02-13 19:45:58 +00:00
Aaqa Ishtyaq
105069302b chore(tvix/eval): clippy warn is length zero
This CL address clippy warning about finding the zero
length of something using `is_empty()` instead of `len() == 0`.

Change-Id: I2b36c7c7b65b733609fc0dcd33be06f9d772bc9b
Signed-off-by: Aaqa Ishtyaq <aaqaishtyaq@gmail.com>
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8029
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2023-02-13 19:45:58 +00:00
Vincent Ambo
c98c5399b9 fix(tvix/eval): skip runtime completely on compiler errors
This branch was missing, and an assumption elsewhere just executed the
returned (broken) bytecode.

This fixes b/253.

Change-Id: I015023ba921bc08ea03882167f1f560feca25e50
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8090
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: tazjin <tazjin@tvl.su>
2023-02-13 16:21:47 +00:00
Vincent Ambo
91a366af46 fix(tvix/eval): make fields of eval's Error type public
These should be inspectable by callers.

Change-Id: Ia9ef871aa63958d06066aaea61b2aecbd217369b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8089
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2023-02-13 16:21:46 +00:00
Alyssa Ross
3c68159b81 chore(whitby): enable zram swap
Whitby has a lot of memory, but I've still been fighting with the OOM
Killer trying to build a few big packages at the same time.  Besides,
it's generally a good idea to always have swap available even if
there's lots of memory for caching optimisation reasons[1], and zram
swap is efficient enough to basically provide bonus memory for free.

[1]: https://haydenjames.io/linux-performance-almost-always-add-swap-space/

Change-Id: I1fbe60f7975ebfa38e341e0de76848ec79b6fcf0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8065
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2023-02-11 12:14:35 +00:00
Alyssa Ross
c4ade691e1 docs(REVIEWS): update scp command
cl.tvl.fyi only supports the legacy scp protocol, not the sftp
protocol that recent versions of OpenSSH now use by default.  So we
need to pass -O to tell it to use scp.

Cc: Vincent Ambo <mail@tazj.in>
Change-Id: I2dcae77fef9126f4f8eebfa574c5a345a5c56615
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8039
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-10 15:15:36 +00:00
Alyssa Ross
08b300aaa8 chore(ops/modules): add a GECOS for my user
This way, I won't have to teach my name one at a time to every program
that wants to know my it (e.g. git).

Change-Id: I45ddd9c2343a10cd4c13bacd9a97b7470db95c14
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8038
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-02-09 09:43:48 +00:00
Florian Klink
d4cbdc2beb feat(tvix/nix-compat/nixhash): support BASE64_NOPAD SRI
Nix accepts SRI hashes that are missing their padding characters
in base64, as seen in
7e49471316/pkgs/development/libraries/kerberos/krb5.nix .

It only seems to work in the SRI case, not with `sha256` being set to a
(nopad) base64 string.

Add regression tests for this, and document why we don't want to support
*additional* characters afterwards.

Reported in https://b.tvl.fyi/issues/252

Change-Id: I9ffc2b417501b426ced1894a9cbf95ff5f0e5159
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8037
Reviewed-by: Alyssa Ross <hi@alyssa.is>
Tested-by: BuildkiteCI
2023-02-08 10:39:26 +00:00
Florian Klink
5fa35d9d49 refactor(tvix/nix-compat/nixhash): fix test function name
Change-Id: I3b089758ce8c01df544064422e56a97a8402513d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8036
Tested-by: BuildkiteCI
Reviewed-by: Alyssa Ross <hi@alyssa.is>
2023-02-08 10:39:26 +00:00
Alyssa Ross
5da1f4161c fix(tvix): fix InvalidEncodedDigestLength message
Before:
	error[E997]: invalid output hash: invalid encoded digest length '43' for algo 43

After: error[E997]: invalid output hash: invalid encoded digest length '43' for algo sha256

Change-Id: Icb533839586b47f90b4e8d22083cce397f9f3655
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8035
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2023-02-07 17:40:54 +00:00
Florian Klink
87e1934f2d docs(store/protos): update comment on blobstore Read and Put
Further emphasize Read() can be used to ask for blobs OR chunks, and
that clients usually want to stat and then request (smaller) chunks,
rather than reading whole blobs.

Also clarify that the chunking used to send BlobChunks over has nothing
to do with the chunk sizes communicated in a Stat() request.

Change-Id: Ia615d190aae570611de2655b11342a14d0b75976
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8028
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-07 14:14:35 +00:00
Vincent Ambo
0a27344953 chore(3p/sources): bump nixpkgs & overlays (2023-02-07)
Included fixes:

* //3p/overlays: tdlib override no longer needed (bump has landed upstream)
* //corp/{predlozhnik,tvixbolt}: bump wasm-bindgen to match nixpkgs

Home-manager has not been bumped as it has introduced an
incompatibility with Nix 2.3

Change-Id: I96ac3462b82c73db1ba23be03d7968f10abc9b53
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8033
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: sterni <sternenseemann@systemli.org>
2023-02-07 13:46:35 +00:00
Vincent Ambo
bdf93dcefe fix(nixery): fix link to nixery logo
Change-Id: Ib78659b971696feaff579bc0a31df7d8ee24e459
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8034
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-06 17:36:54 +00:00
Vincent Ambo
720e80c1f9 fix(tvix/eval): fix the default case for path parsing
Plain paths like `foo/bar.nix` are also allowed, so we can not
determine this based on the prefix.

The upstream PR that is referenced in a comment here has a
significantly different interface than we expected, so I'm not
touching that comment yet in this CL before I've had more time to
digest it.

Change-Id: Iea33bbb35de9c00a7d7fedf64d02253c75c1cc9e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8032
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: Alyssa Ross <hi@alyssa.is>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-02-04 12:44:59 +00:00
Vincent Ambo
26b55f8cda fix(tvix/cli): use tvlfyi/wu-manber fork for refscanner
Our fork fixes a small bug (https://github.com/jneem/wu-manber/pull/1)
but it's not clear whether upstream will accept patches, so for now
lets point this directly at our fork.

Change-Id: Iccdcedae3e9a8b783241431787c952561d032694
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8031
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-04 12:44:59 +00:00
Florian Klink
c13759e89f feat(corp/tvixbolt): link to tvl.su too
Make it clear that Tvixbolt is a project of TVL LLC, and link to the
community website too.

See https://b.tvl.fyi/issues/248

Change-Id: Iefefe0263fa5ef01587d49c5a130a38b78ca7981
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8019
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
2023-02-03 19:04:21 +00:00
Florian Klink
459dadfe9d docs(corp/website): distinguish TVL LLC and TVL
See https://b.tvl.fyi/issues/248

Change-Id: Iacc10841bdcdf1dbc8eab659d82e076fa2151979
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8020
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-03 19:04:20 +00:00
Florian Klink
d50044d570 chore(tvix/eval): only use Rc with impure feature
We only use Rc in `impl EvalIO for StdIO`, which is only included when
building with the "impure" feature.

Change-Id: Id29d647c899cbfcdda11abfb9fabd5aa7e24299f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8025
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-03 18:58:17 +00:00
Vincent Ambo
f16b0f24e2 refactor(tvix/eval): wrap Builtin type in a Box
This reduces the size of `Builtin` from 88 (!) bytes to 8, and as the
largest variant of `Value`, the size of that type from 96 to 64.

The next largest type is NixList, clocking in at 64 bytes.

This has noticeable performance impact. In an implementation without
disk I/O, evaluating nixpkgs.stdenv looks like this:

Benchmark 1: tvix -E '(import <nixpkgs> {}).stdenv.drvPath'
  Time (mean ± σ):      1.151 s ±  0.003 s    [User: 1.041 s, System: 0.109 s]
  Range (min … max):    1.147 s …  1.155 s    10 runs

After this change, it looks like this:

Benchmark 1: tvix -E '(import <nixpkgs> {}).stdenv.drvPath'
  Time (mean ± σ):      1.046 s ±  0.004 s    [User: 0.954 s, System: 0.092 s]
  Range (min … max):    1.041 s …  1.053 s    10 runs

Change-Id: I5ab7cc02a9a450c0227daf1f1f72966358311ebb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8027
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2023-02-03 18:47:33 +00:00
Vincent Ambo
32698766ef refactor(tvix/eval): statically resolve select from constant attrs
When resolving a select expression (`attrs.name` or `attrs.name or
default`), if the set compiles to a constant attribute set (as is most
notably the case with `builtins`) we can backtrack and replace that
attribute set directly with the compiled value.

For something like `builtins.length`, this will directly emit an
`OpConstant` that leaves the `length` builtin on the stack.

Change-Id: I639654e065a06e8cfcbcacb528c6da7ec9e513ee
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7957
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2023-02-03 18:47:33 +00:00
Florian Klink
f2afd38f2d docs(tvix): move mg shell command into one line
This was reflowed in a funny way. Move the whole command into its own
line, to prevent it from happening.

Change-Id: Ifba4daf418487ca4c32586820071930d29020f42
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8026
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2023-02-03 12:07:07 +00:00
Vincent Ambo
0dd07440b4 test(tvix/cli): eval nixpkgs.stdenv in CI and assert that it matches
Change-Id: If80194b5fdbf69512217bd4780e416e678045323
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8023
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-02-03 10:47:18 +00:00
Vincent Ambo
3419f63575 fix(tvix/eval): ensure all evaluated thunks are correctly memoized
This fixes a very complicated bug (b/246). Evaluation
progresses *much* further after this, leading to several less
complicated bugs likely being uncovered by this

What was the problem?
=====================

Previously, when evaluating a thunk, we had a code path that looked
like this:

    match *thunk {
        ThunkRepr::Evaluated(Value::Thunk(ref inner_thunk)) => {
            let inner_repr = inner_thunk.0.borrow().clone();
            drop(thunk);
            self.0.replace(inner_repr);
        }
        /* ... */
    }

This code path created a copy of the inner `ThunkRepr` of a nested
thunk, and moved that copy into the `ThunkRepr` of the parent.

The effect of this was that the original `ThunkRepr` (unforced!) lived
on in the original thunk, without the memoization of the subsequent
forcing applying to it.

This had the result that Tvix would repeatedly evaluate these thunks
without ever memoizing them, if they occured repeatedly as shared
inner thunks. Most notably, this would *always* occur when
builtins.import was used.

What's the solution?
====================

I have completely rewritten `Thunk::force_trampoline_self` to make all
flows that can occur in it explicit. I have also removed the outer
loop inside of that function, and resorted to more use of trampolining
instead.

The function is now well-commented and it should be possible to read
it from top-to-bottom and get a general sense of what is going on,
though the trampolining itself (which is implemented in the VM) needs
to be at least partially understood for this.

What's the new problem(s)?
==========================

One new (known) problem is that we have to construct `Error` instances
in all error types here, but we do not have spans available in some
thunk-related situations. Due to b/238 we cannot ask the VM for an
arbitrary span from the callsite leading to the force. This means that
there are now code paths where, under certain conditions, causing an
evaluation error during thunk forcing will panic.

To fix this we will need to investigate and fix b/238, and/or add a
span tracking mechanism to thunks themselves.

What other impacts does this have?
==================================

With this commit, eval of nixpkgs mostly succeeds (things like stdenv
evaluate to the same hashes for us and C++ Nix, meaning we now
construct identical derivations without eval breaking).

Due to this we progress much further into nixpkgs, which lets us
uncover more additional bugs. For example, after this commit we can
quickly see that cl/7949 introduces some kind of behavioural issue and
should not be merged as-is (this was not apparent before).

Additionally, tvix-eval is now seemingly very fast. When doing
performance analysis of a nixpkgs eval, we now mostly see the code
path for shelling out to C++ Nix to add things to the store in there.
We still need those code paths, so we can not (yet) do a performance
analysis beyond that.

Change-Id: I738525bad8bc5ede5d8c737f023b14b8f4160612
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8012
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2023-02-03 10:47:18 +00:00
Vincent Ambo
38e8c2e959 fix(tvix/cli): keep tracking full paths in known_paths
We need to distinguish explicitly between the paths used for the
scanner, and the paths that populate the derivation inputs. The full
paths must be accessible from the result of the refscanner to populate
drv fields correctly.

This was previously hidden by debug changes that masked actual IO
operations with no-ops.

Change-Id: I037af6e6bbe2b573034d695f8779bee1b56bc125
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8022
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-02-02 23:37:34 +00:00
Vincent Ambo
e6235e2932 feat(tvix/cli): cache imported paths in NixCompatIO
Creates a cache of imported literal files (e.g.
`./default-builder.sh`) which avoids shelling out to Nix for each
instance of the same file.

Note that a better way to tackle this is to create memoizable thunks
for these expressions in the compiler, but we are lacking a little bit
of infrastructure for that at the moment.

Change-Id: Ibc062b20d81e97dd3986e734d225a744e1779fe7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8015
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2023-02-02 17:50:44 +00:00
Vincent Ambo
9d6f29a72b refactor(tvix/cli): use Wu-Manber string scanning for drv references
Switch out the string-scanning algorithm used in the reference scanner.

The construction of aho-corasick automata made up the vast majority of
runtime when evaluating nixpkgs previously. While the actual scanning
with a constructed automaton is relatively fast, we almost never scan
for the same set of strings twice and the cost is not worth it.

An algorithm that better matches our needs is the Wu-Manber multiple
string match algorithm, which works efficiently on *long* and *random*
strings of the *same length*, which describes store paths (up to their
hash component).

This switches the refscanner crate to a Rust implementation[0][1] of
this algorithm.

This has several implications:

1. This crate does not provide a way to scan streams. I'm not sure if
   this is an inherent problem with the algorithm (probably not, but
   it would need buffering). Either way, related functions and
   tests (which were actually unused) have been removed.

2. All strings need to be of the same length. For this reason, we
   truncate the known paths after their hash part (they are still
   unique, of course).

3. Passing an empty set of matches, or a match that is shorter than
   the length of a store path, causes the crate to panic. We safeguard
   against this by completely skipping the refscanning if there are no
   known paths (i.e. when evaluating the first derivation of an eval),
   and by bailing out of scanning a string that is shorter than a
   store path.

On the upside, this reduces overall runtime to less 1/5 of what it was
before when evaluating `pkgs.stdenv.drvPath`.

[0]: Frankly, it's a random, research-grade MIT-licensed
     crate that I found on Github:

     https://github.com/jneem/wu-manber

[1]: We probably want to rewrite or at least fork the above crate, and
     add things like a three-byte wide scanner. Evaluating large
     portions of nixpkgs can easily lead to more than 65k derivations
     being scanned for.

Change-Id: I08926778e1e5d5a87fc9ac26e0437aed8bbd9eb0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8017
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2023-02-02 17:50:44 +00:00
Vincent Ambo
2c07ff0f8c docs(tvix): add more information to README
The README was very sparse before and we've actually had people email
us (as it says to contact us) just to ask what Tvix *is*. This should
answer some questions!

Change-Id: I0f248cb060eccfe086468afed1d648652b35dfd1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8018
Tested-by: BuildkiteCI
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: flokli <flokli@flokli.de>
2023-02-02 16:25:52 +00:00
Vincent Ambo
503e6810e7 fix(tvix/eval): unsafeDiscardStringContext is a no-op
... not just a TODO.

Most use-cases of unsafeDiscardStringContext are for cases where a
string is processed in some ways and no longer contains a "physical"
reference, but still has its context attached in C++ Nix.

We don't need to do this. This does diverge in behaviour in use-cases
related to build scheduling, but that whole behaviour will be
different in Tvix.

Change-Id: I4056d4c09f62d44d6bd52b791db03fe5556672b5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8016
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2023-02-02 14:30:32 +00:00
Vincent Ambo
75d1b72b7c refactor(tvix/eval): import_cache can be a HashMap
... instead of a BTreeMap, as we do not need ordering guarantees here.
HashMaps are noticeably faster here (especially as we've been sorting
essentially random data!).

Change-Id: Ie92d74286df9f763c04c9b226ef1066ee8484c13
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8014
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Autosubmit: tazjin <tazjin@tvl.su>
2023-02-02 14:25:30 +00:00