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2024-07-06libutil: turn HashModuloSink into a free functioneldritch horrors
Change-Id: I5878007502fa68c2816a0f4c61f7d0e60bdde702
2024-07-06libutil: return sources from runProgram2eldritch horrors
this much more closely mimics what is actually happening: we're reading data from somewhere else, actively, rather than passively waiting. with the data flow matching the underlying system interactions better we can remove a few sinkToSource calls that merely exists to undo the mismatch caused by not treating subprocess output as a data source to begin with Change-Id: If4abfc2f8398fb5e88c9b91a8bdefd5504bb2d11
2024-07-05libutil: return a program handle from runProgram2eldritch horrors
this will let us also return a source for the program output later, which will in turn make sinkToSource unnecessary for program output processing. this may also reopen a path for provigin program input, but that still needs a proper async io framework to avoid problems. Change-Id: Iaf93f47db99c38cfaf134bd60ed6a804d7ddf688
2024-07-05libutil: convert readFileSource to a generatoreldritch horrors
Change-Id: I5f92b15fd367d46eb047d74ab6e317b4f51a46d3
2024-07-05libstore: convert dumpPath to a generatoreldritch horrors
Change-Id: Ic4cf5562504aa29130304469936f958c0426e5ef
2024-07-03libstore: add LocalDerivationGoal startChild hookArtemis Tosini
Add a platform-specific function for starting sandboxed child. Generally this just means startProcess, but on Linux we use flags for clone to start a new namespace Change-Id: I41c8aba62676a162388bbe5ab8a7518904c7b058
2024-07-03libstore: Add LocalDerivationGoal prepareSandbox hookArtemis Tosini
Add a new OS-specific hook called `prepareSandbox`, run before forking On Darwin this is empty as nothing is required, on Linux this creates the chroot directory and adds basic files, and on platforms using a fallback this throws an exception Change-Id: Ie30c38c387f2e0e5844b2afa32fd4d33b1180dae
2024-07-03libutil: begin porting serialization to generatorseldritch horrors
generators are a better basis for serializers than streaming into sinks as we do currently for many reasons, such as being usable as sources if one wishes to (without requiring an intermediate sink to serialize full data sets into memory, or boost coroutines to turn sinks into sources), composing more naturally (as one can just yield a sub-generator instead of being forced to wrap entire substreams into clunky functions or even more clunky custom types to implement operator<< on), allowing wrappers to transform data with clear ownership semantics (removing the need for explicit memory allocations and Source wrappers), and many other things Change-Id: I361d89ff556354f6930d9204f55117565f2f7f20
2024-06-27store: delete obsolete lsof-disabling codeJade Lovelace
Since Ifa0adda7984e, we don't use this code anymore on macOS, so we have no reason to have a knob to disable it anymore. Change-Id: Ie29a8a8978d9aefd4551895f4f9b3cc0827496df
2024-06-27store: guess the URL of failing fixed-output derivationsJade Lovelace
This is a shameless layering violation in favour of UX. It falls back trivially to "unknown", so it's purely a UX feature. Diagnostic sample: ``` error: hash mismatch in fixed-output derivation '/nix/store/sjfw324j4533lwnpmr5z4icpb85r63ai-x1.drv': likely URL: https://meow.puppy.forge/puppy.tar.gz specified: sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= got: sha256-a1Qvp3FOOkWpL9kFHgugU1ok5UtRPSu+NwCZKbbaEro= ``` Change-Id: I873eedcf7984ab23f57a6754be00232b5cb5b02c
2024-06-24Add build-dir setting, clean up default TMPDIR handlingRobert Hensing
This is a squash of upstream PRs #10303, #10312 and #10883. fix: Treat empty TMPDIR as unset Fixes an instance of nix: src/libutil/util.cc:139: nix::Path nix::canonPath(PathView, bool): Assertion `path != ""' failed. ... which I've been getting in one of my shells for some reason. I have yet to find out why TMPDIR was empty, but it's no reason for Nix to break. (cherry picked from commit c3fb2aa1f9d1fa756dac38d3588c836c5a5395dc) fix: Treat empty XDG_RUNTIME_DIR as unset See preceding commit. Not observed in the wild, but is sensible and consistent with TMPDIR behavior. (cherry picked from commit b9e7f5aa2df3f0e223f5c44b8089cbf9b81be691) local-derivation-goal.cc: Reuse defaultTempDir() (cherry picked from commit fd31945742710984de22805ee8d97fbd83c3f8eb) fix: remove usage of XDG_RUNTIME_DIR for TMP (cherry picked from commit 1363f51bcb24ab9948b7b5093490a009947f7453) tests/functional: Add count() (cherry picked from commit 6221770c9de4d28137206bdcd1a67eea12e1e499) Remove uncalled for message (cherry picked from commit b1fe388d33530f0157dcf9f461348b61eda13228) Add build-dir setting (cherry picked from commit 8b16cced18925aa612049d08d5e78eccbf0530e4) Change-Id: Ic7b75ff0b6a3b19e50a4ac8ff2d70f15c683c16a
2024-06-23Merge "libstore: reduce loglevel of `waiting for a machine to build`" into mainMaximilian Bosch
2024-06-23libutil: return Pid from startProcess, not pid_teldritch horrors
Change-Id: Icc8a15090c77f54ea7d9220aadedcd4a19922814
2024-06-23libutil: give Pid proper resource semanticseldritch horrors
copy-constructing or assigning from pid_t can easily lead to duplicate Pid instances for the same process if a pid_t was used carelessly, and Pid itself was copy-constructible. both could cause surprising results such as killing processes twice (which could become very problemantic, but luckily modern systems don't reuse PIDs all that quickly), or more than one piece of the code believing it owns a process when neither do Change-Id: Ifea7445f84200b34c1a1d0acc2cdffe0f01e20c6
2024-06-23libutil: make Pid -> pid_t operations expliciteldritch horrors
Change-Id: I3137cc140590001fe7ba542844e735944a0a9255
2024-06-23libutil: remove sinkToSource eof callbackeldritch horrors
this is only used in one place, and only to set a nicer error message on EndOfFile. the only caller that actually *catches* this exception should provide an error message in that catch block rather than forcing support for setting error message so deep into the stack. copyStorePath is never called outside of PathSubstitutionGoal anyway, which catches everything. Change-Id: Ifbae8706d781c388737706faf4c8a8b7917ca278
2024-06-23libstore: Start creating LocalDerivationGoal subclassesArtemis Tosini
LocalDerivationGoal includes a large number of low-level sandboxing primitives for Darwin and Linux, intermingled with ifdefs. Start creating platform-specific classes to make it easier to add new platforms and review platform-specific code. This change only creates support infrastructure and moves two function, more functions will be moved in future changes. Change-Id: I9fc29fa2a7345107d4fc96c46fa90b4eabf6bb89
2024-06-22libstore: reduce loglevel of `waiting for a machine to build`Maximilian Bosch
This comes quite often when the available job slots on all remote builders are exhausted and this is pretty spammy. This isn't really an issue, but expected behavior. A better way to display this is a nom-like approach where all scheduled builds are shown in a tree and pending builds are being marked as such IMHO. Change-Id: I6bc14e6054f84e3eb0768127b490e263d8cdcf89
2024-06-21Merge "libstore: remove operations that are never called by supported ↵jade
clients" into main
2024-06-20Merge "libstore: fix queryValidPaths concurrency" into mainjade
2024-06-19libstore: remove operations that are never called by supported clientsJade Lovelace
I did a whole bunch of `git log -S` to find out exactly when all these things were obsoleted and found the commit in which their usage was removed, which I have added in either the error message or a comment. I've also made *some* of the version checks into static asserts for when we update the minimum supported protocol version. In the end this is not a lot of code we are deleting, but it's code that we will never have to support into the future when we build a protocol bridge, which is why I did it. It is not in the support baseline. Change-Id: Iea3c80795c75ea74f328cf7ede7cbedf8c41926b
2024-06-19filetransfer: return a Source from download()eldritch horrors
without this we will not be able to get rid of makeDecompressionSink, which in turn will be necessary to get rid of sourceToSink (since the libarchive archive wrapper *must* be a Source due to api limitations) Change-Id: Iccd3d333ba2cbcab49cb5a1d3125624de16bce27
2024-06-19libutil: return a source from readFileeldritch horrors
don't consume a sink, return a source instead. the only reason to not do this is a very slight reduction in dynamic allocations, but since we are going to *at least* do disk io that will not be a lot of overhead anyway Change-Id: Iae2f879ec64c3c3ac1d5310eeb6a85e696d4614a
2024-06-19libstore: BinaryCacheStore::getFile{ -> Contents}eldritch horrors
if we want have getFile return a source instead of consuming a sink we'll have to disambiguate this overload another way, eg like this. Change-Id: Ia26de2020c309a37e7ccc3775c1ad1f32e0a778b
2024-06-18store: fix null reference from DerivationGoal::waiteeDoneJade Lovelace
This happened during a PathSubstitutionGoal of a .drv file: substitution of '/tmp/jade/nix-test/ca/eval-store/store/1lj7lsq5y0f25mfbnq6d3zd0bw5ay33n-dependencies-input-2.drv' What happened here is that since PathSubstitutionGoal is not a DerivationGoal, in production builds, the UB was not caught, since it would early-exit from failing a dynamic_cast to DerivationGoal * on the very next line, but before the null reference was ever used. This was nonetheless UB. The fix should be to just rearrange the two lines; I don't think there is a further bug there, since *substituting a .drv* **necessarily** means you cannot have the representation of the derivation as would be necessary for drv to not be null there. Test failure: ++(eval-store.sh:12) _RR_TRACE_DIR=/home/jade/.local/share/rr rr record -- nix build -f dependencies.nix --eval-store /tmp/jade/nix-test/ca/eval-store/eval-store -o /tmp/jade/nix-test/ca/eval-store/result don't know how to build these paths: /tmp/jade/nix-test/ca/eval-store/store/6y51mf0p57ggipgab6hdjabbvplzsicq-dependencies-top.drv copying 1 paths... copying path '/tmp/jade/nix-test/ca/eval-store/store/8027afyvqb87y1sf5xhdkqsflqn1ziy8-dependencies.builder0.sh' to 'local'... copying 1 paths... copying path '/tmp/jade/nix-test/ca/eval-store/store/7r5pqyncvfgrryf9gzy1z56z3xigi61x-builder-dependencies-input-0.sh' to 'local'... copying 1 paths... copying path '/tmp/jade/nix-test/ca/eval-store/store/nhmgm87zlqy3ks96dxrn7l37b72azi99-builder-dependencies-input-1.sh' to 'local'... copying 1 paths... copying path '/tmp/jade/nix-test/ca/eval-store/store/nq4qa2j6y8ajqazlfq6h46ck637my1n6-builder-dependencies-input-2.sh' to 'local'... copying 1 paths... copying path '/tmp/jade/nix-test/ca/eval-store/store/6vh0vna9l5afck01y7iaks3hm9ikwqyj-builder-fod-input.sh' to 'local'... building '/tmp/jade/nix-test/ca/eval-store/store/gy91pqymf2nc5v7ld1bad94xpwxdi25s-dependencies-input-0.drv'... building '/tmp/jade/nix-test/ca/eval-store/store/w7wlkjx97ivmnrymkac5av3nyp94hzvq-dependencies-input-1.drv'... ../src/libstore/build/derivation-goal.cc:1556:22: runtime error: reference binding to null pointer of type 'Derivation' 0 0x734ba59a6886 in nix::DerivationGoal::waiteeDone(std::shared_ptr<nix::Goal>, nix::Goal::ExitCode) /home/jade/lix/lix2/build/src/libstore/build/derivation-goal.cc:1556:12 1 0x734ba59c0962 in nix::Goal::amDone(nix::Goal::ExitCode, std::optional<nix::Error>) /home/jade/lix/lix2/build/src/libstore/build/goal.cc:95:25 2 0x734ba5a1c44a in nix::PathSubstitutionGoal::done(nix::Goal::ExitCode, nix::BuildResult::Status, std::optional<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>>) /home/jade/lix/lix2/build/src/libstore/build/substitution-goal.cc:38:5 3 0x734ba5a1b454 in nix::PathSubstitutionGoal::init() /home/jade/lix/lix2/build/src/libstore/build/substitution-goal.cc:56:9 4 0x734ba5a2a6c6 in nix::Worker::run(std::set<std::shared_ptr<nix::Goal>, nix::CompareGoalPtrs, std::allocator<std::shared_ptr<nix::Goal>>> const&) /home/jade/lix/lix2/build/src/libstore/build/worker.cc:320:23 5 0x734ba59b93d8 in nix::Store::buildPathsWithResults(std::vector<nix::DerivedPath, std::allocator<nix::DerivedPath>> const&, nix::BuildMode, std::shared_ptr<nix::Store>) /home/jade/lix/lix2/build/src/libstore/build/entry-points.cc:60:12 6 0x734ba663c107 in nix::Installable::build2(nix::ref<nix::Store>, nix::ref<nix::Store>, nix::Realise, std::vector<nix::ref<nix::Installable>, std::allocator<nix::ref<nix::Installable>>> const&, nix::BuildMode) /home/jade/lix/lix2/build/src/libcmd/installables.cc:637:36 Change-Id: Id0e651e480bebf6356733b01bc639e9bb59c7bd0
2024-06-18filetransfer: {up,down}load -> transfereldritch horrors
even the transfer function is not all that necessary since there aren't that many users, but we'll keep it for now. we could've kept both names but we also kind of want to use `download` for something else very soon Change-Id: I005e403ee59de433e139e37aa2045c26a523ccbf
2024-06-18libstore: fix queryValidPaths concurrencyJade Lovelace
The lock usage was obviously wrong so it was entirely serialized. This has the predicted speedups, the only question is whether it is sound because it's exposing a bunch of new code to actual concurrency. I did audit all the stores' queryPathInfoUncached implementations and they all look *intended* to be thread safe, but whether that is actually sound or not: lol lmao. I am highly confident in the s3 one because it is calling s3 sdk methods that are thread safe and has no actual state. Others are using Pool and look to be *supposed* to be thread safe, but unsure if they actually are. Change-Id: I0369152a510e878b5ac56c9ac956a98d48cd5fef
2024-06-18store-api: fix/clarify capture lifetimes in copyPathsJade Lovelace
This seems to fix a use of stack after return. Change-Id: If690a6defb9a3225684685132cf78b227e271447
2024-06-18libstore: work around aws sdk log spam at debug levelJade Lovelace
aws-sdk-cpp spams logs about sending TLS data in the otherwise rather helpful debug logs. I've filed a PR upstream to stop it, but for now we can just fix their verbosity ourselves. Upstream-PR: https://github.com/aws/aws-sdk-cpp/pull/3003 Change-Id: I0c41a50d5f5958106836d6345843f4b05b9c8981
2024-06-18s3: delete obsolete ifdefsJade Lovelace
The versions checked for are so old that we can just drop support. Change-Id: Ib9cf136d1cb9a4a91a6613102c4fd15e1190363b
2024-06-16libstore client: remove remaining dead codeJade Lovelace
Change-Id: I1764b3878439ff7b20ff64bd4efcf03070bb0e5e
2024-06-16libstore: refuse to serialise ancient protocolsJade Lovelace
We don't want to deal with these at all, let's stop doing so. (marking this one as the fix commit since its immediate predecessors aren't the complete fix) Fixes: https://git.lix.systems/lix-project/lix/issues/325 Change-Id: Ieea1b0b8ac0f903d1e24e5b3e63cfe12eeec119d
2024-06-16libstore client: remove support for <2.3 clientsJade Lovelace
Change-Id: I71c2e8ca644b6187e0084f35e82f3316c9d425b0
2024-06-16libstore daemon: remove very old protocol support (<2.3)Jade Lovelace
Change-Id: Ic05f478a659c199a66fe78ae05d357d317ac41b0
2024-06-16Set up minimum protocol versionJade Lovelace
Change-Id: Ibb931109a8328cfb22964542ab53644cc4181f9e
2024-06-15Change the sqlite missing valid path message to say it's the dbJade Lovelace
I meant to edit https://gerrit.lix.systems/c/lix/+/1161 but apparently clicked the wrong button somehow. Oops. Change-Id: I9b9ba058ec9206d3c8abe125d91dc554cced52fe
2024-06-16Change error messages about 'invalid paths' to 'path does not exist'.julia
Fixes #270. Change-Id: I07d2da41498cfdf324a03af40533044d58c97c7e
2024-06-16Add a clearer error message for InvalidPathError during evaluationjulia
Part of #270, #271 Change-Id: I864d7340f26d3c0f9c45db7b6b545face38d8294
2024-06-16Harmonise the Store::queryPathInfoUncached interfacejulia
This: - Consistently returns `nullptr` for a non-existent store path, instead of a mix of `nullptr` and throwing exceptions. - If a store returns "bad" store paths in response to a request (e.g. incorrect hash or name), don't cache this result. This removes some duplication of code at the cache-access layer of queryPathInfo() checking this, and ­allows us to provide more specific errors. Part of #270. Change-Id: I86612c6499b1a37ab872c712c2304d6a3ff19edb
2024-06-12doc: rewrite the multi-user documentation to actually talk about securityJade Lovelace
It's in the security section, and it was totally outdated anyway. I took the opportunity to write down the stuff we already believed. Change-Id: I73e62ae85a82dad13ef846e31f377c3efce13cb0
2024-06-06build: expose option to enable or disable precompiled std headersQyriad
They are enabled by default, and Meson will also prints whether or not they're enabled at the bottom at the end of configuration. Change-Id: I48db238510bf9e74340b86f243f4bbe360794281
2024-06-06Merge "libstore/filetransfer: fix no-s3 build" into mainjade
2024-06-05libstore/filetransfer: fix no-s3 buildLinus Heckemann
Fixes a compiler error that looks like: error: could not convert '[...]' from 'future<void>' to 'future<nix::FileTransferResult>' Change-Id: I4aeadfeba0dadfdf133f25e6abce90ede7a86ca6
2024-06-01Merge "build: fix static linking with a hack" into mainQyriad
2024-06-01chore: rebrand Nix to Lix when it makes senseRaito Bezarius
Here's my guide so far: $ rg '((?!(recursive).*) Nix (?!(daemon|store|expression|Rocks!|Packages|language|derivation|archive|account|user|sandbox|flake).*))' -g '!doc/' --pcre2 All items from this query have been tackled. For the documentation side: that's for https://git.lix.systems/lix-project/lix/issues/162. Additionally, all remaining references to github.com/NixOS/nix which were not relevant were also replaced. Fixes: https://git.lix.systems/lix-project/lix/issues/148. Fixes: https://git.lix.systems/lix-project/lix/issues/162. Change-Id: Ib3451fae5cb8ab8cd9ac9e4e4551284ee6794545 Signed-off-by: Raito Bezarius <raito@lix.systems>
2024-05-31build: fix static linking with a hackQyriad
This causes libstore, libexpr, libfetchers, and libutil to be linked with -Wl,--whole-archive to executables, when building statically. libstore for the store backends, libexpr for the primops, libfetchers for the fetcher backends I assume(?), and libutil for the nix::logger initializer (which notably shows in pre-main constructors when HOME is not owned by the user. cursed.). This workaround should be removed when #359 is fixed. Fixes #306. Change-Id: Ie9ef0154e09a6ed97920ee8ab23810ca5e2de84c
2024-05-31Merge "truncate WAL files on exit" into mainjade
2024-05-31Merge changes Ifcb0d310,I664366b8,Ibe7cf546 into mainjade
* changes: gitignore: delete 90% of it build-time: remove 20% more by PCH'ing C++ stdlib shellHook: make it actually run
2024-05-31truncate WAL files on exitannalee
Fix for https://github.com/NixOS/nix/issues/10300 https://github.com/lix-project/lix/commit/18a26202737a74f216d285d92bd4a84761788026 enabled persistent WAL files that will never get truncated. to fix this, journal_size_limit is set to 2^40, which results in the WAL files being truncated to 0 on exit, as well as limiting the WAL files to 2^40 bytes following a checkpoint. this aligns lix with the nix change: https://github.com/NixOS/nix/pull/10301 https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpersistwal https://www.sqlite.org/pragma.html#pragma_journal_size_limit https://github.com/sqlite/sqlite/blob/ed517a708284b6e00b6ae5f1e3f702bbfcbd32ed/src/wal.c#L2518 PR-Link: https://github.com/lix-project/lix/pull/9 Co-Authored-By: paparodeo <170618376+paparodeo@users.noreply.github.com> Change-Id: I90ec1a467c92c582ff8c07dd363a4cf789782214
2024-05-31libstore/build: copy ca-certificates tooAlois Wohlschlager
In b469c6509ba616da6df8a27e4ccb205a877c66c9, the ca-certificates file was missed. It should be copied too so that we don't end up bind-mounting a broken symlink. Change-Id: Ic9b292d602eb94b0e78f77f2a27a19d24665783c