Implement the RPC client and server handlers for the FindRoots and
CollectGarbage RPC calls
Change-Id: Ifa5d582c6a33bd1e7661ac2fc860505ef404dad0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1656
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
The source and destination strings cannot be the same string - absl
will write to the destination in a streaming manner, causing the
source to become invalid.
Change-Id: I3578cf1f8789a51d85e0950f7987c398f0a00953
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1659
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
In certain circumstances, the decompression thread could race ahead of the downloader thread and process the same chunk twice. Clear the data buffer while the lock is held to prevent this kind of incident.
Change-Id: I19a84a0c5768d1228c6c18a7664a7b8893ef96de
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1658
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
This adds an implementation of BinaryCacheStore to be used by tests exercising both the logic inherent to BinaryCacheStore and more general Store tests.
A new library target, nixstoremock, is created to indicate that this file is intended only for use in tests and not in user-facing code.
Change-Id: Ib68f777238843a4f3a2303db8a69735fbc22d161
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1645
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Implement the AddToStore RPC client method, which uses an
AddToStorePathWriterSink (the dual of the AddToStorePathReaderSource on
the server side) to hook into the dumpPath machinery (which we should
refactor not to use sinks or sources, but not yet) and write dumped
paths as binary data over gRPC. With this commit and sandboxing
disabled, the following derivation builds cleanly:
derivation {
name = "test";
builder = ./build.sh;
system = "x86_64-linux";
}
where build.sh has chmod +x and contains:
#!/bin/sh
echo 1 > $out
Change-Id: I94cab86f0825a3a9993262a9807130645c13bf44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1638
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Tested-by: BuildkiteCI
Implement RPC handlers and client methods for the AddWithRoot and
SyncWithGC calls. With this and sandboxing disabled, the following
derivation is now building successfully:
derivation {
name = "test";
builder = "/bin/sh";
args = [ "-c" "echo 1 > $out" ];
system = "x86_64-linux";
}
Co-authored-by: Vincent Ambo <mail@tazj.in>
Change-Id: I245dca0dfca882e2eae5d93364287a8b79fead71
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1637
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Tested-by: BuildkiteCI
Without this, these errors print as "uncaught exception of type
std::string", but with this they print using nix's built-in error
printer, which will be nice to have as we bang out the remaining store
API methods.
Co-authored-by: Vincent Ambo <mail@tazj.in>
Change-Id: I9bd4f77f65b27c8f97b727b98ef62e2061999e71
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1636
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
This reverts part of commit 976a36c2e4,
which was causing scanForReferences to hang indefinitely. I'm not sure
what the original intent of the commit was since there's not really much
of a commit message on it, but with this I am able to fully realise
derivations.
Change-Id: I620e892e2fe2244f066512286b086b3dd8f8f6c0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1635
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: kanepyork <rikingcoding@gmail.com>
When tokenizeString was changed to absl::StrSplit, there was a behavior
change because tokenizeString on an empty string returned an empty
vector - which the derivation builder (and likely a bunch of other
stuff) was depending on. The canonical way of fixing this is by passing
absl::SkipEmpty() to the function - there may be other places we need to
fix this as well.
This commit also includes some opportunistic absl::StrFormats and
StrCats, because I was here anyway, but those have no semantic
difference.
Change-Id: Ibf9bb602284f793fa55728481f63b838fb7a41db
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1631
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
We wrap every server-side proto handler with a macro that catches
exceptions and turns them into proper grpc error codes. For the
time being, most exceptions map to INTERNAL, the existing mapping.
Change-Id: Id6ed6a279b198ad185d32562f39000ccc15eadbf
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1599
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
At some point the behavior of this function got changed as part of our
cleanup - this fixes it to behave the way the rest of the codebase
expects (and how it is documented in the header) and covers it with a
few tests.
Change-Id: Id4c91232968e73489cd866fb4a2a84bcf20d875e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1629
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Implement AddTextToStore and BuildPaths both on the client and the
server
Refs: #29
Change-Id: I45294c3e1c1a7489e42099d36425b7acc04e0427
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1560
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Tested-by: BuildkiteCI
Add a rapidcheck test covering roundtrip parse and serialize for Nix
derivations. This covers a bug we discovered in ef54f5d which broke this
roundtrip.
Change-Id: I72d140334b5f24f79e82e34f98609c695dbfbf93
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1582
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
It turns out these aren't supposed to be reused after the first request
- reusing it was causing things to blow up.
Change-Id: I935f1ee82ed4e7f26528ae105c8fa2501fa81b97
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1559
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Tested-by: BuildkiteCI
Prepend the unix:// URI scheme to the daemon socket so that grpc knows
we want to connect to a unix socket rather than another type of URI. As
part of debugging this I made the failure message for the RPCStore
include the URI, which I'm leaving in since it'll be nice to have.
Change-Id: I6e70596895117b9a0d53fe2a61d8542ceb64c940
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1543
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Tested-by: BuildkiteCI
Implement the RPC client calls for QueryPathFromHashPart,
QuerySubstitutablePaths, and QuerySubstitutablePathInfos, and the
handler for QuerySubstitutablePathInfos.
Refs: #29
Change-Id: Idf383b771f159f267d8f65367bc4af3d239e32b7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1515
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Implement the proto handler for AddToStore, which adds a nix path to the
store. This is implemented by adding a new (probably
soon-to-be-generalized) Source concretion that wraps a grpc ServerReader
for the stream of data we're receiving from the client - this is less
than ideal, as it's perpetuating the source/sink thing that's going on
and storing entire nars in memory, but is at the very worst an
incremental step towards a functioning nix that we can refactor in the
future.
Paired-With: Perry Lorier <isomer@tvl.fyi>
Paired-With: Vincent Ambo <mail@tazj.in>
Change-Id: I48db734e7460a47aee4a85dd5137b690980859e3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1441
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: tazjin <mail@tazj.in>
The use of `unwrap_throw` can be used as a later grep target.
Change-Id: I8c54ed90c4289f07aecb8a1393dd10204c8bce4e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1493
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
Add a stub class for wrapping a gRPC client to the new, proto-backed nix
store protocol, along with several methods implemented but several left
throwing a not implemented exception.
Paired-With: Vincent Ambo <mail@tazj.in>
Paired-With: Perry Lorier <isomer@tvl.fyi>
Change-Id: Id943d4f6d75084b8498786d580e6c9f7c92c104d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1436
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Implement the main function for the new, proto-based nix daemon. This
mostly replicates the behavior of the previous nix daemon - it starts a
grpc server listening on the same nix socket path and supports the same
set of options - with the exception of --stdio, which has been renamed
to --pipe and documented in the man page.
Change-Id: Ib729283c1d5d35c0e1b0a968bc1f052f5527f2d7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1356
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Replace the custom, rather questionable base64 implementation with
absl::Base64{Une,E}scape. To make sure that the custom implementation
was doing the same thing I've also added a test covering
nix::Hash::to_string, which was one function that used it - the test
passed prior to the replacement, and continued to pass afterwards.
The previous base64Decode function threw an exception on failure - to
avoid going too far down the rabbit hole I've replicated that
functionality at all call sites, but this should be replaced with more
sensible error handling such as StatusOr eventually.
Also, before this change:
❯ nix eval -f . users.tazjin.emacs.outPath
"/nix/store/g6ri2q8nra96ix20bcsc734r1yyaylb1-tazjins-emacs"
And after:
❯ ./result/bin/nix eval -f . users.tazjin.emacs.outPath
"/nix/store/g6ri2q8nra96ix20bcsc734r1yyaylb1-tazjins-emacs"
Change-Id: Id292ffbb82fe808f3f1b34670afbe7b8c13ad615
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1385
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
The use of vfork() in Nix is entirely illegal. Quote:
If the process created by vfork() returns from the function in which vfork() was
called, or calls any other function before successfully calling _exit() or
one of the exec*() family of functions, the behavior is undefined.
-- Linux man-pages, release 5.05
Add a TODO to use the higher-performance variants of clone() on Linux when it
is available.
Change-Id: I42370e1568ad6e2d00d70d0b66c8aded8f1288bb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1418
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: Alyssa Ross <hi@alyssa.is>
nixutil depends on bzip2, lzma, boost::context, brotli{enc,dec}, and
openssl, but wasn't directly linking to them. This was causing linker
errors in a test that only depended on nixutil.
Change-Id: I60e77ea7b18b08e2946fcf9176ae0f355cd71844
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1384
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
The SQL schemas are included as string constants which are
concatenated into a header file. In the previous Makefiles, this was
done with envsubst or something - we moved it to CMake.
There was a missing quote around the string to be interpolated, which
meant that CMake interpreted the semicolons as part of its language
syntax and did not emit them.
Change-Id: Ibb4512788b26b53f297db3535094dc0194614446
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1342
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
Plugins seem to not really be used anywhere (I can find one plugin
that's actually defined, and it doesn't seem very useful, especially
since we got rid of builtins.exec) and their presence is adding
additional complexity and potential sources of bugs to an already
unsteady refactor. At some point we may want to bring back
something *like* plugins, but their design will likely be different and
it will definitely be after we have a functioning Nix again.
Change-Id: I3bc40e55917f70bf260fbc208c1705e2e6a7c626
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1291
Tested-by: BuildkiteCI
Reviewed-by: Alyssa Ross <hi@alyssa.is>
Reviewed-by: isomer <isomer@tvl.fyi>
This compiles under `-Wall -Werror`.
The largest chunk of this change is `final` qualifiers for the various
Nix CLI command structs, which inherit from a Command class that has
more virtual functions than are implemented by each command.
Change-Id: I0925e6e1a39013f026773db5816e4a77d50f3b4a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1294
Tested-by: BuildkiteCI
Reviewed-by: isomer <isomer@tvl.fyi>
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Removes the verbosity enum, which is no longer actively used anywhere
other than a daemon protocol implementation bit that doesn't actually
work.
Since the verbosity was marked deprecated, this removes one of the
last remaining warnings.
Change-Id: Iaee9d1d6c14b30daac83bb44bcacff32a0e07fb0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1289
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Implement the proto handler on the server side for
Worker::BuildDerivation. This includes several additions to the proto
which I had missed on the first pass, including the actual proto
definition for the Derivation itself and a few sequence number
reorderings which are fine because this is all provisional and not
deployed yet.
A couple things to note
- I implemented a couple constructors for nix classes that initialize
themselves based on their proto variants, which felt nice and didn't
end up causing any issues.
- I've made the conversions between the enum types in nix and in proto
explicit via switch statements rather than using a static_cast, out of
an abundance of caution that the error would get mismatched in the
future and we'd convert the wrong thing to the wrong thing - this is
verbose, but exceptionally future proof.
Change-Id: Iecf6b88e76bc37e49efa05fd65d6cd0cb0deffed
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1249
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: Kane York <rikingcoding@gmail.com>
This silences a -Winconsistent-missing-override
Change-Id: I2492a8ab3c0b0a33a794f012bfee6bbd0c2f0a8e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1271
Reviewed-by: Kane York <rikingcoding@gmail.com>
Tested-by: BuildkiteCI
This change does away with the previous special-casing of lists of
certain element sizes, and the use of raw C-style arrays.
Lists are now backed by a std::vector of nix::Value*, which uses the
traceable GC allocator.
This change is unfortunately quite noisy because the accessor methods
were updated/removed accordingly, so all callsites of Nix-related
lists have changed.
For some operations in primops.cc where keeping the previous code
structure would have been more difficult with a "proper" vector, the
implementation has been replaced with std::vector methods. For
example, list concatenation now uses appropriate range inserts.
Anecdotally the performance of this is about equal, to even slightly
better, than the previous implementation.
All language tests pass and the depot paths I've used for testing
still evaluate.
Change-Id: Ib5eca6c0207429cb323a330c838c3a2200b2c693
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1266
Tested-by: BuildkiteCI
Reviewed-by: isomer <isomer@tvl.fyi>
Reviewed-by: Kane York <rikingcoding@gmail.com>
Reviewed-by: glittershark <grfn@gws.fyi>
Configures the CMake build to load & run the GoogleTest tests.
I (grfn) also updated this to get the tests running as part of the nix
derivation, which required defining our own manual configurePhase and
installCheckPhase, rather than depending on the one provided by stdenv.
Not doing this would cause cmake to attempt to *run* the tests as part
of the buildPhase, which wouldn't work because the dynamic libraries
hadn't been put into a place where the test executables knew where to
find them. We're not sure *why* this fixes it, and for some reason
fixing this also breaks the automatic behavior of nixpkgs of passing
-j$NIX_BUILD_CORES -l$NIX_BUILD_CORES to make, but that's eaasy enough
to fix manually in a preBuild
Paired-With: Griffin Smith <grfn@gws.fyi>
Change-Id: I79d61854a3ff47301cdce8a40c76820a97bdf901
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1240
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
These files were always implicitly depended upon by worker-protocol.hh, but just so happened also always be included in places where the other ones were already present.
We are likely getting rid of this file sooner rather than later, but in
the meantime this will cause clangd to shut up while I'm editing the
file.
Change-Id: I0d765f8b86828b6612e5483417e452221ea3c5b1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1207
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
They're not mentioned anywhere on the client or the server.
Change-Id: Ia78c8bde49326f6bf69b4aeded083cfd3235131f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1188
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Slight performance optimisation of nix::printString by copying chunks
of the input string which do not need escaping as contiguous blocks.
Paired-With: Perry Lorier <isomer@tvl.fyi>
Change-Id: I48bad90c8f2831ae4524c814a12b1982989922f9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1184
Tested-by: BuildkiteCI
Reviewed-by: edef <edef@edef.eu>
Reviewed-by: glittershark <grfn@gws.fyi>
Previously the nix-daemon would crash if a user fed it invalid store
paths for drv files. The crash was due to the changed assertion
triggering. Whenever that assertion would hit the nix-daemon process
along with all it's current childs (running builds from all users) would
be interrupted.
Before this patch:
$ nix-store --realise /nix/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.drv
don't know how to build these paths:
/nix/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.drv
error: unexpected end-of-file
< nix-daemon terminates >
With this patch:
$ nix-store --realise /nix/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.drv
don't know how to build these paths:
/nix/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.drv
error: path '/nix/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.drv' is not a valid store path
< nix-daemon does *NOT* terminate >
Change-Id: I01c5048c8a43a8b9154bdeb781d05b7744869ec0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/981
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: tazjin <mail@tazj.in>
This isn't actually used yet, but forces the protos to be included in
the build which is useful for iteration.
Change-Id: I2abcaf297f34ae741f00ad0c929b226d5603c9d7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/928
Tested-by: BuildkiteCI
Reviewed-by: isomer <isomer@tvl.fyi>
Also fixes the pkgconfig files to use the corresponding CMake variables.
Change-Id: I8095b8aff39ad91e592f3edc95555c9f1f1f153d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/545
Reviewed-by: tazjin <mail@tazj.in>
This ensures that we install both glog's .a and all the .so files we
generate into a single consistent output lib path (which is, err,
lib64, but whatever).
Change-Id: Ib6ac6eacf5f56e4b719cfb586db731efc122c31b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/544
Reviewed-by: tazjin <mail@tazj.in>
Having a colon in the path may cause issues, and having the hash
function indicated isn't actually necessary. We now verify the path
format in the tests to prevent regressions.
(cherry picked from commit c65a6fa86aef7bdf51fb4fba7bd31d265619ba3f)
This makes the paths consistent without relying on ordering.
Co-authored-by: edef <edef@edef.eu>
(cherry picked from commit 515c0a263e137a00e82f7d981284dbe54db23247)
Completes the switch from Meson to CMake for the core build system in
Nix.
Meson was added originally because someone else had already done the
work for integrating it in Nix and it was an upgrade from the previous
setup.
However over time it became clear that Meson is not quite mature
enough for projects like Nix that have occasionally peculiar
configuration constraints.
Some issues encountered with Meson (some of these are due to the Meson
setup in Nix):
* Difficulty with generating correct compile_commands.json for
external tools like clangd
* Difficulty linking to libc++ when using clang
* Ugly shell invocations for certain parts of the build system (I want
these to be gone!!!)
This CMake setup mimics the Meson configuration, but there are some
differences (some temporary):
* headers are now included separately for each library (see a previous
commit that changes includes appropriately)
* autoheaders-style configuration is currently hardcoded. Before
blindly copying this I want to evaluate how much of it actually exists
for portability concerns that I don't have (such as support for OS
X).
* Nix is built with libc++ by default.
* [libstore] SQL schema is now inlined via a generated header, not an
included string literal
Abseil is still built as part of this build, rather than an external
dependency, because it chokes on differently configured compiler
invocations.
Note that because of the move to libc++ an unwanted behaviour is
introduced: glog log messages no longer have a body. I have yet to
debug what is going on there.
Previously all includes were anchored in one global mess of header
files. This moves the includes into filesystem "namespaces" (if you
will) for each sub-package of Nix.
Note: This commit does not introduce the relevant build system changes.
This function was a custom (and inefficient in the case of
single-character delimiters) string splitter which was used all over
the codebase. Abseil provides an appropriate replacement function.
Replaces these functions with corresponding functions from Abseil,
namely absl::StripAsciiWhitespace and absl::SimpleAtoi.
In the course of doing this some minor things I encountered along the
way were also refactored.
This also changes the signatures of the various custom readFile
functions to use absl::string_view types.
It is considered bad form to use things from includes in headers, as
these directives propagate to everywhere else and can make it
confusing.
types.hh (which is includes almost literally everywhere) had some of
these directives, which this commit removes.
This applies the modernization fixes listed here:
https://clang.llvm.org/extra/clang-tidy/checks/list.html
The 'modernize-use-trailing-return-type' fix was excluded due to my
personal preference (more specifically, I think the 'auto' keyword is
misleading in that position).
This last change set was generated by a full clang-tidy run (including
compilation):
clang-tidy -p ~/projects/nix-build/ \
-checks=-*,readability-braces-around-statements -fix src/*/*.cc
Actually running clang-tidy requires some massaging to make it play
nice with Nix + meson, I'll be adding a wrapper or something for that soon.
These were not caught by the previous clang-tidy invocation, but were
instead sorted out using amber[0] as such:
ambr --regex 'for (\(.+\))\s([a-z].*;)' 'for $1 { $2 }'
[0]: https://github.com/dalance/amber
These were not caught by the previous clang-tidy invocation, but were
instead sorted out using amber[0] as such:
ambr --regex 'if (\(.+\))\s([a-z].*;)' 'if $1 { $2 }'
[0]: https://github.com/dalance/amber
This change was generated with:
fd -e cc -e hh | xargs -I{} clang-tidy {} -p ~/projects/nix-build/ \
--checks='-*,readability-braces-around-statements' --fix \
-fix-errors
Some manual fixes were applied because some convoluted unbraced
statements couldn't be untangled by clang-tidy.
This commit still includes invalid files, but I decided to clean them
up in a subsequent commit so that it becomes more obvious where
clang-tidy failed. Maybe this will allow for a bug-report to
clang-tidy.
Removes the activity transfer that was previously nulled out from the
daemon protocol completely.
This might actually break Nix completely, I haven't tried yet, but
that's fine because this will be replaced with gRPC.
