We only need bstr::ByteSlice to be able to use replace, it doesn't need
to return a BString.
Change-Id: I811948436fb89652e880970c2c05356183f3e439
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9084
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
builtins.div ought to truncate towards zero so that
-(builtins.div a b) == builtins.div (-a) b
-(builtins.div a b) == builtins.div a (-b)
Change-Id: I8b7c08cd7f4fa8a1363c786d42c8d484f6cd133d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9006
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
This allows pinning the name of the sparse tree derivation, which
stops the continous rebuilding of tvix-store-proto dependents.
I've opted to let the function take an attribute set instead and
refactored the call sites appropriately.
Change-Id: I3e57785094b1adbfffa24caf9f1c3384844fa200
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8965
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Make it more obvious if these are bytes pointing to JSON or ATerm, so we
don't get confused.
Change-Id: I2402c687b7ba9c05aac20ed63b0df54e4e96a9d8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8998
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
This is more concise than a io::copy of a Cursor to bytes, and we have
everything to be written in memory.
Change-Id: I81f34666aa61aef4e16b33423ce4a69c3781efc3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8997
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
write_input_derivations shouldn't need to write a comma to separate it
from the previous output from write_outputs.
This is better placed in the function calling all of these helper
functions.
Change-Id: I9ccc440e4665b52369ef39e75151b9a29469ce48
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8995
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
We're happy with any &[S], as long as <S: AsRef<[u8]>.
This allows passing both strings and &[u8].
Change-Id: If2a80d9b1ee33ba328c9cdab4fa83ca7b98a71e2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8994
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
Let the escape function only take care of string escaping, not quoting.
Let write_array_elements always quote and escape strings it consumes.
Move the business of writing additional wrapping characters around it to
the caller.
Change-Id: Ib8dea69c409561b49862c531ba5a3fe6c2f061f8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8993
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Derivations can have non-unicode strings in their env values, so the
ATerm representations are not necessarily String anymore, but Vec<u8>.
Change-Id: Ic23839471eb7f68d9c3c30667c878830946b6607
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8990
Tested-by: BuildkiteCI
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Autosubmit: flokli <flokli@flokli.de>
This allows sorting Store Paths. We delegate the sorting business to the
PartialOrd, Ord impls for our digest fields only, as two StorePaths with
the same digest, but different names can't exist.
Change-Id: I5f81631e5f5063893b316c63a240c5266b7e5bad
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8988
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Add the position in the string where the name is problematic.
Change-Id: If6fd8be6100b718f8d68568eafc77ebb3cfb82d0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8979
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
This will save us some copies, because a clone will simply create an
additional pointer to the same data.
Change-Id: I017a5d6b4c85a861b5541ebad2858ad4fbf8e8fa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8978
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Some paths might use names that are not valid UTF-8. We should be able
to represent them.
We don't actually need to touch the PathInfo structures, as they need to
represent StorePaths, which come with their own harder restrictions,
which can't encode non-UTF8 data.
While this doesn't change any of the wire format of the gRPC messages,
it does however change the interface of tvix_eval::EvalIO - its
read_dir() method does now return a list of Vec<u8>, rather than
SmolStr. Maybe this should be OsString instead?
Change-Id: I821016d9a58ec441ee081b0b9f01c9240723af0b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8974
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
This "reverts" commit 9f600de226 (the
initial revert of f5e291cf83).
Now with BlobService returning a BlobReader that implements io::Seek, we
can actually just call blob_reader.seek(io::SeekFrom::Start(offset as
u64)).
This means, we currently will fail to seek backwards inside a file.
Change-Id: I9c19448df6831a3537252f99210374f2126ecfc0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8886
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
For memory and sled, it's trivial, as we already have a Cursor<Vec<u8>>.
For gRPC, we simply reject going backwards, and skip n bytes for now.
Once the gRPC protocol gets support for offsets and verified streaming,
this can be improved.
Change-Id: I734066a514aed287ea3db64bfb1680911ac1eeb0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8885
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
The primary constructor for this is now from_bytes, from_string is
simply calling .as_bytes() on the string, passing it along.
The InvalidName error now contains a Vec<u8>, to encode the invalid name
(which might not be a string anymore).
from_absolute_path now accepts a &[u8] (even though we might want to
make this a OSString of some sort).
StorePath::validate_name has been degraded to a pub(crate) function.
It's still used in src/derivation, even though it probably shouldn't at
all - that cleanup is left for cl/8412 though.
Change-Id: I6b4e62a6fa5c4bec13b535279e73444f0b83ad35
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8973
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
This being a nested error makes things more complicated than necessary.
Also, this caused BuildStorePathError to only hold NameError,
so refactor these utility functions to either return Error, or
BuildStorePathError.
Change-Id: I046fb403780cc5135df8b8833a291fc2a90fd913
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8972
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
This explicitly documents behavior of C++ Nix that goes against the
intuition you'd gather from this document: that e.g. a simple select
from an attribute set causes a value to no longer be pointer equal to
its former self.
The point of documenting this is that we can show in a to be written
section on the use of pointer equality in nixpkgs that pointer equality
is only needed in a limited sense for evaluating it (C++ Nix's exterior
pointer equality). Tvix's pointer equality is far more powerful since
value identity preserving operations also preserve pointer equality,
generally speaking (this is because we implement interior pointer
equality in my made up terminology). This should eventually also be
documented.
Change-Id: I6ce7ef2d67b012f5ebc92f9e81bba33fb9dce7d0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8856
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
This fixes a subtle issue which would occasionally lead to a crash (e.g.
when evaluating (pkgs.systemd.outPath with --trace-runtime): With each
character in the string that has a multi byte representation in UTF-8,
the actual byte position and what tvix thought it was would get out of
sync. This could either lead to
* Tvix swallowing characters or jumbling characters if multi byte
characters would cause the tracked index to become out of sync with
the byte position before the first character to be escaped, or
* Tvix crashing if (in the same situation) the out of sync index would
be within a UTF-8 byte sequence.
Luckily, std's `char_indices()` iterator implements exactly what
`nix_escape_char()`'s original author had in mind with
`.chars().enumerate()`. Using `i + 1` for continuing is safe, since all
characters that need (in fact, can) to be escaped in Nix are represented
as a single byte in UTF-8.
Change-Id: I1c836f70cde3d72db1c644e9112852f0d824715e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8952
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
Improve change some little things I noticed while reading through it.
Change-Id: I033209eece395e5aad4e10825e8dd6c0cfe68191
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8725
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
I want to expand on the C++ Nix behavior, since it seems relevant to
note that a lot of operations in C++ Nix (like select) don't preserve
pointer equality (see
<https://github.com/NixOS/nix/issues/3371#issuecomment-1596167957>).
It is especially so, as Tvix establishes pointer equality in a different
way and thus shows differing behavior. Therefore I want to additionally
document Tvix's current behavior and make it more explicit to what
extent nixpkgs needs pointer equality.
Change-Id: I9b4ba75dacb749c9fcbba4b9646c6b48bb57bbad
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8852
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
This reverts commit f5e291cf83.
The offsets are relative to the start of the file, and as long as we
don't have BlobReaders implement seek, this will be very annoying to
deal with.
Change-Id: I05968f7c5c0ec0000597da90f451d6bb650c3e13
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8882
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
buf contains everything written so far, whereas b is the slice passed in
the current write() call. If we copy from &buf, we end up with the wrong
hash, because we keep writing the wrong data to the hash function.
Change-Id: I768d4645934a6a7d75b9c8eeba35f8f3be5edd26
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8880
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
This moves from stateless I/O to actually dealing with file handles,
allowing the filesystem to keep reusing existing blobreaders, instead of
opening a new reader on every read() call.
Change-Id: I3fc35c071e4aee1021c8bbd58749d082b0abd188
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8834
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>
The change allows applications that use tvix_serde for parsing
nix-based configuration to extend the language with domain-specific
set of features.
Change-Id: Ia86612308a167c456ecf03e93fe0fbae55b876a6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8848
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
I've noticed this behavior when writing the admittedly cursed test case
included in this CL. Alternatively we could use some sort of machinery
using `builtins.trace`, but I don't think we capture stderr anywhere.
I've elected to put this into the eval cache itself while C++ Nix does
it in builtins.import already, namely via `realisePath`. We don't have
an equivalent for this yet, since we don't support any kind of IfD, but
we could revise that later. In any case, it seems good to encapsulate
`ImportCache` in this way, as it'll also allow using file hashes as
identifiers, for example.
C++ Nix also does our equivalent of canon_path in `builtins.import`
which we still don't, but I suspect it hardly makes a difference.
Change-Id: I05004737ca2458a4c67359d9e7d9a2f2154a0a0f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8839
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
This is a first implementation of a FUSE filesystem, mounting tvix-store
to a given location.
This is mostly meant as one additional lens into a store, and could be
used for builds. It's not meant to be used as a general-purpose thing.
It still has some rough edges:
- It doesn't implement open/close, so it doesn't use file handles.
Which means, we need to open blobs for partial reads over and over
again.
- It doesn't implement seek, as BlobReader doesn't implement seek yet.
- It doesn't track "lifetimes" of inodes by listening on forget,
meaning it might hold more data in memory than necessary.
- As we don't have store composition (and a caching layer) yet,
operations might be slow.
Change-Id: Ib1812ed761dfaf6aeb548443ae939c87530b7be8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8667
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
When dealing with a formal argument in a function argument pattern that
has a default expression, there are two different things that can happen
at runtime: Either we select its value from the passed attribute
successfully or we need to use the default expression. Both of these may
be thunks and both of these may need finalisers. However, in the former
case this is taken care of elsewhere, the value will always be finalised
already if necessary. In the latter case we may need to finalise the
thunk resulting from the default expression. However, the thunk
corresponding to the expression may never end up in the local's stack
slot. Since finalisation goes by stack slot (and not constants), we need
to prevent a case where we don't fall back to the default expression,
but finalise anyways.
Previously, we worked around this by making `OpFinalise` ignore
non-thunks. Since finalisation of already evaluated thunks still
crashed, the faulty compilation of function pattern arguments could
still cause a crash.
As a new approach, we reinstate the old behavior of `OpFinalise` to
crash whenever encountering something that is either not a thunk or
doesn't need finalisation. This can also help catching (similar)
miscompilations in the future. To then prevent the crash, we need to
track whether we have fallen back or not at runtime. This is done using
an additional phantom on the stack that holds a new `FinaliseRequest`
value. When it comes to finalisation we check this value and
conditionally execute `OpFinalise` based on its value.
Resolves b/261 and b/265 (partially).
Change-Id: Ic04fb80ec671a2ba11fa645090769c335fb7f58b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8705
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
