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2024-08-04tree-wide: fix various lint warningsJade Lovelace
Change-Id: I0fc80718eb7e02d84cc4b5d5deec4c0f41116134
2024-08-04flake & doxygen: update taglineJade Lovelace
This tagline was left over from CppNix and we should make it tastier. Change-Id: Ia182b86f6e751591be71a50521992ad73c7b38b5
2024-08-04nix flake metadata: print modified dates for input flakesJade Lovelace
This was always in the lock file and we can simply actually print it. The test for this is a little bit silly but it should correctly control for my daring to exercise timezone code *and* locale code in a test, which I strongly suspect nobody dared do before. Sample (abridged): ``` Path: /nix/store/gaxb42z68bcr8lch467shvmnhjjzgd8b-source Last modified: 1970-01-01 00:16:40 Inputs: ├───flake-compat: github:edolstra/flake-compat/0f9255e01c2351cc7d116c072cb317785dd33b33 │ Last modified: 2023-10-04 13:37:54 ├───flake-utils: github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a │ Last modified: 2024-03-11 08:33:50 │ └───systems: github:nix-systems/default/da67096a3b9bf56a91d16901293e51ba5b49a27e │ Last modified: 2023-04-09 08:27:08 ``` Change-Id: I355f82cb4b633974295375ebad646fb6e2107f9b
2024-08-04cli: eat terminal codes from stdout alsoJade Lovelace
This *should* be sound, plus or minus the amount that the terminal code eating code is messed up already. This is useful for testing CLI output because it will strip the escapes enough to just shove the expected output in a file. Change-Id: I8a9b58fafb918466ac76e9ab585fc32fb9294819
2024-08-04Implement forcing CLI colour on, and document it betterJade Lovelace
This is necessary to make some old tests work when testing colour against non-interactive outputs. Change-Id: Id89f8a1f45c587fede35a69db85f7a52f2c0a981
2024-08-04manual: fix a syntax error in redirects.js that made it not do anythingJade Lovelace
lol lmao Let's put in a syntax checker in CI so we do not have to deal with this nonsense ever again. Change-Id: I0fe875e0cfc59ab1783087762e5bb07e09ded105
2024-08-04misc docs/meson tidyingJade Lovelace
The docs page has an incorrect escape that leads to a backslash appearing in output. Meson stuff is self-explanatory, just shortens and simplifies a bit. Change-Id: Ib63adf934efd3caeb82ca82988f230e8858a79f9
2024-08-04build: implement clang-tidy using our pluginJade Lovelace
The principle of this is that you can either externally build it with Nix (actual implementation will be in a future commit), or it can be built with meson if the Nix one is not passed in. The idea I have is that dev shells don't receive the one from Nix to avoid having to build it, but CI can use the one from Nix and save some gratuitous rebuilds. The design of this is that you can run `ninja -C build clang-tidy` and it will simply correctly clang-tidy the codebase in spite of PCH bullshit caused by the cc-wrapper. This is a truly horrendous number of hacks in a ball, caused by bugs in several pieces of software, and I am not even getting started. I don't consider this to fix the clang-tidy issue filing, since we still have a fair number of issues to fix even on the existing minimal configuration, and I have not yet implemented it in CI. Realistically we will need to do something like https://github.com/Ericsson/codechecker to be able to silence warnings without physically touching the code, or at least *diff* reports between versions. Also, the run-clang-tidy output design is rather atrocious and must not be inflicted upon anyone I have respect for, since it buries the diagnostics in a pile of invocation logs. We would do really well to integrate with the Gerrit SARIF stuff so we can dump the reports on people in a user-friendly manner. Related: https://git.lix.systems/lix-project/lix/issues/147 Change-Id: Ifefe533f3b56874795de231667046b2da6ff2461
2024-08-02Merge "libstore/ssh: only resume the logger when we paused it" into mainalois31
2024-08-02libstore/ssh: only resume the logger when we paused itAlois Wohlschlager
In the SSH code, the logger was conditionally paused, but unconditionally resumed. This was fine as long as resuming the logger was idempotent. Starting with 0dd1d8ca1cdccfc620644a7f690ed35bcd2d1e74, it isn't any more, and the behaviour of the code in question was missed. Consequently, an assertion failure is triggered for example when performing builds against an "SSH" store on localhost. Fix the issue by only resuming the logger when it has actually been paused. Fixes: https://git.lix.systems/lix-project/lix/issues/458 Change-Id: Ib1e4d047744a129f15730b7216f9c9368c2f4211
2024-08-02libstore: move Goal::amDone to Workereldritch horrors
we still mutate goal state to store the results of any given goal run, but now we also have that information in Worker and could in theory do something else with it. we could return a map of goal to goal results, which would also let us better diagnose failures of subgoals (at all). Change-Id: I1df956bbd9fa8cc9485fb6df32918d68dda3ff48
2024-08-02libstore: return finishedness from Goal methodseldritch horrors
this is the first step towards removing all result-related mutation of Goal state from goal implementations themselves, and into Worker state instead. once that is done we can treat all non-const Goal fields like private state of the goal itself, and make threading of goals possible Change-Id: I69ff7d02a6fd91a65887c6640bfc4f5fb785b45c
2024-08-02libstore: encapsulate worker build hook stateeldritch horrors
once goals run on multiple threads these fields must by synchronized as one, or we try to run build hooks to often (or worse, not often enough) Change-Id: I47860e46fe5c6db41755b2a3a1d9dbb5701c4ca4
2024-08-02libutil: make RunningProgram::wait more resilienteldritch horrors
this will usually be used either directly (which is always fine) or in Finally blocks (where it must never throw execptions). make sure that, exceptions being handled or not, the calling wait() in Finally doesn't cause crashes due to the Finally no-nested-exceptions-thrown assertion Change-Id: Ib83a5d9483b1fe83b9a957dcefeefce5d088f06d
2024-08-02Merge "package: make aws-sdk-cpp build input optional" into mainJeremy List
2024-08-02Merge "nix flake show: add the description if it exists" into mainIsabel
2024-08-02Merge "Reapply "libfetchers: make attribute / URL query handling ↵Maximilian Bosch
consistent"" into main
2024-08-01Reapply "libfetchers: make attribute / URL query handling consistent"Maximilian Bosch
The original attempt at this introduced a regression; this commit reverts the revert and fixes the regression. This reverts commit 3e151d4d77b5296b9da8c3ad209932d1dfa44c68. Fix to the regression: flakeref: fix handling of `?dir=` param for flakes in subdirs As reported in #419[1], accessing a flake in a subdir of a Git repository fails with the previous commit[2] applied with the error error: unsupported Git input attribute 'dir' The problem is that the `dir`-param is inserted into the parsed URL if a flake is fetched from the subdir of a Git repository. However, for the fetching part this isn't even needed. The fix is to just pass `subdir` as second argument to `FlakeRef` (which needs a `basedir` that can be empty) and leave the parsedURL as-is. Added a regression test to make sure we don't run into this again. [1] https://git.lix.systems/lix-project/lix/issues/419 [2] e22172aaf6b6a366cecd3c025590e68fa2b91bcc, originally 3e151d4d77b5296b9da8c3ad209932d1dfa44c68 Change-Id: I2c72d5a32e406a7ca308e271730bd0af01c5d18b
2024-08-01Merge "flake: remove control character from file by using fromJSON" into mainjade
2024-08-02package: make aws-sdk-cpp build input optionalJeremy List
I have added an option to turn off this build input because I'm much more comfortable when I don't have that type of thing on my computer. Its default value is true in order to avoid impacting anyone who depends on AWS features. Change-Id: Ic57f3c9b9468f422e9fbdcf3ba0fe96177631067
2024-08-01Merge changes Icc4747ae,Id4717b5b,Ie3ddb3d0,Ic4d93a08,I00d9ff70 into mainQyriad
* changes: remove unused headers in installable-attr-path libexpr: include the type of the non-derivation value in the type error libexpr: mild cleanup to getDerivations libexpr: DrvInfo: remove unused bad-citizen constructor cleanup and slightly refactor DrvInfo::queryOutputs
2024-07-31flake: remove control character from file by using fromJSONJade Lovelace
I was reminded by various evil things puck did to the evaluator involving null bytes that you can get funny bytes by abusing JSON parsing. It's neater than putting binary in the source file, so let's do it. Change-Id: I1ff2e0d829eb303fbed81fa2ebb3a39412e89ff1
2024-08-01Merge changes from topic "undefined-behaviour" into mainjade
* changes: releng: move officialRelease to version.json Add -Werror CI job ci: add a asan+ubsan test run on x86_64-linux tree-wide: add support for asan!
2024-08-01remove unused headers in installable-attr-pathQyriad
Change-Id: Icc4747aed195e3855b128c73df82e202405af6a8
2024-08-01libexpr: include the type of the non-derivation value in the type errorQyriad
Change-Id: Id4717b5b0df7c09b0dbf17e642d8713a0a3efbae
2024-08-01libexpr: mild cleanup to getDerivationsQyriad
Shuffled the logic around a bit so the shorter code paths are early returns, added comments, etc. Should be NFC. Change-Id: Ie3ddb3d0eddd614d6f8c37bf9a4d5a50282084ea
2024-08-01libexpr: DrvInfo: remove unused bad-citizen constructorQyriad
DrvInfo's constructor that only takes `EvalState` leaves everything else empty; a DrvInfo which has no iota of information about the derivation it represents is not useful, and was not used anywhere. Change-Id: Ic4d93a08cb2748b8cef9a61e41e70404834b23f9
2024-08-01cleanup and slightly refactor DrvInfo::queryOutputsQyriad
Change-Id: I00d9ff707fe61995737b86af6d2eaa1e4d8116ff
2024-07-31releng: move officialRelease to version.jsonJade Lovelace
This was causing a few bits of suffering downstream, in particular, in the NixOS module, which, after this change, can have the `officialRelease` stuff in *it* completely deleted since we now have correct defaulting in package.nix for it. It also eliminates some automated editing of Nix files, which is certainly always welcome to eliminate. Fixes: https://git.lix.systems/lix-project/lix/issues/406 Change-Id: Id12f3018cff4633e379dbfcbe26b7bc84922bdaf
2024-07-31Add -Werror CI jobJade Lovelace
We should cause CLs that introduce compiler warnings to fail CI. Sadly this will only cover Clang, but it will cover Clang for free, so it's truly impossible to say if it's bad or not. Change-Id: I45ca20d77251af9671d5cbe0d29cb08c5f1d03c2
2024-07-31ci: add a asan+ubsan test run on x86_64-linuxJade Lovelace
This should at least catch out blatantly bad patches that don't pass the test suite with ASan. We don't do this to the integration tests since they run on relatively limited-memory VMs and so it may not be super safe to run an evaluator with leak driven garbage collection for them. Fixes: https://git.lix.systems/lix-project/lix/issues/403 Fixes: https://git.lix.systems/lix-project/lix/issues/319 Change-Id: I5267b02626866fd33e8b4d8794344531af679f78
2024-07-31tree-wide: add support for asan!Jade Lovelace
What if you could find memory bugs in Lix without really trying very hard? I've had variously scuffed patches to do this, but this is blocked on boost coroutines removal at this point tbh. Change-Id: Id762af076aa06ad51e77a6c17ed10275929ed578
2024-07-31libexpr: implement actual constructors for nix::ValueQyriad
Change-Id: Iebc2bb4e4ea5e93045afe47677df756de4ec4d05
2024-07-30Merge changes I609a5898,I7afb53c9 into mainV.
* changes: devendor pegtl update flake.lock
2024-07-30libstore: move Goal::getBuildResult to BuildResulteldritch horrors
there are no other uses for this yet, but asking for just a subset of outputs does seem at least somewhat useful to have as a generic thing Change-Id: I30ff5055a666c351b1b086b8d05b9d7c9fb1c77a
2024-07-30Merge "src/libcmd/repl.cc: avoid unneeded reload after :e" into mainMax Siling
2024-07-30src/libcmd/repl.cc: avoid unneeded reload after :eGoldstein
If `:edit`ing a store path, don't reload repl afterwards to avoid losing local variables: store is immutable, so "editing" a store path is always just viewing it. Resolves: https://git.lix.systems/lix-project/lix/issues/341 Change-Id: I3747f75ce26e0595e953069c39ddc3ee80699718
2024-07-30libstore: count all substitutions toward the same limiteldritch horrors
limiting CA substitutions was a rather recent addition, and it used a dedicated counter to not interfere with regular substitutions. though this works fine it somewhat contradicts the documentation; job limits should apply to all kinds of substitutions, or be one limit for each. Change-Id: I1505105b14260ecc1784039b2cc4b7afcf9115c8
2024-07-30libstore: always wake up goals on EOFeldritch horrors
all goals do this. it makes no sense to not notify a goal of EOF conditions because this is the universal signal for "child done" Change-Id: Ic3980de312547e616739c57c6248a8e81308b5ee
2024-07-30libstore: simplify substitution handleEOFeldritch horrors
both substitution goals add only this single fd to their wait set. Change-Id: Ibf921f5bb3919106208a0871523b32c8f67fb3d3
2024-07-29libstore: remove Worker::updateProgresseldritch horrors
just update progress every time a goal has returned from work(). there seem to be no performance penalties, and the code is much simpler now. Change-Id: I288ee568b764ee61f40a498d986afda49987cb50
2024-07-26Merge "releng: Remove workaround for skopeo feature we didn't know about" ↵jade
into main
2024-07-26devendor pegtlvigress8
Change-Id: I609a58985fc5210806d0959049a48976ae079c30
2024-07-26update flake.lockvigress8
Change-Id: I7afb53c929d297061dba6ec4a3ec7c6e3c6a553e
2024-07-26Merge changes I45d3895f,I541be3ea,Ibe51416d into mainalois31
* changes: libstore/build: block io_uring libstore/build: use an allowlist approach to syscall filtering libstore/build: always treat seccomp setup failures as fatal
2024-07-25Merge "libutil: Support getSelfExe on FreeBSD" into mainArtemis Tosini
2024-07-25Merge changes Ic0dfcfe2,Ibe73851f,Ia7a8df1c,I400b2031 into mainjade
* changes: package.nix: remove dead code diff-closures: remove gratuitous copy tree-wide: NULL -> nullptr libutil: rip out GNU Hurd support code
2024-07-25libstore/build: block io_uringAlois Wohlschlager
Unfortunately, io_uring is totally opaque to seccomp, and while currently there are no dangerous operations implemented, there is no guarantee that it remains this way. This means that io_uring should be blocked entirely to ensure that the sandbox is future-proof. This has not been observed to cause issues in practice. Change-Id: I45d3895f95abe1bc103a63969f444c334dbbf50d
2024-07-25libstore/build: use an allowlist approach to syscall filteringAlois Wohlschlager
Previously, system call filtering (to prevent builders from storing files with setuid/setgid permission bits or extended attributes) was performed using a blocklist. While this looks simple at first, it actually carries significant security and maintainability risks: after all, the kernel may add new syscalls to achieve the same functionality one is trying to block, and it can even be hard to actually add the syscall to the blocklist when building against a C library that doesn't know about it yet. For a recent demonstration of this happening in practice to Nix, see the introduction of fchmodat2 [0] [1]. The allowlist approach does not share the same drawback. While it does require a rather large list of harmless syscalls to be maintained in the codebase, failing to update this list (and roll out the update to all users) in time has rather benign effects; at worst, very recent programs that already rely on new syscalls will fail with an error the same way they would on a slightly older kernel that doesn't support them yet. Most importantly, no unintended new ways of performing dangerous operations will be silently allowed. Another possible drawback is reduced system call performance due to the larger filter created by the allowlist requiring more computation [2]. However, this issue has not convincingly been demonstrated yet in practice, for example in systemd or various browsers. To the contrary, it has been measured that the the actual filter constructed here has approximately the same overhead as a very simple filter blocking only one system call. This commit tries to keep the behavior as close to unchanged as possible. The system call list is in line with libseccomp 2.5.5 and glibc 2.39, which are the latest versions at the point of writing. Since libseccomp 2.5.5 is already a requirement and the distributions shipping this together with older versions of glibc are mostly not a thing any more, this should not lead to more build failures any more. [0] https://github.com/NixOS/nixpkgs/issues/300635 [1] https://github.com/NixOS/nix/issues/10424 [2] https://github.com/flatpak/flatpak/pull/4462#issuecomment-1061690607 Change-Id: I541be3ea9b249bcceddfed6a5a13ac10b11e16ad
2024-07-25libstore/build: always treat seccomp setup failures as fatalAlois Wohlschlager
In f047e4357b4f7ad66c2e476506bf35cab82e441e, I missed the behavior that if building without a dedicated build user (i.e. in single-user setups), seccomp setup failures are silently ignored. This was introduced without explanation 7 years ago (ff6becafa8efc2f7e6f2b9b889ba4adf20b8d524). Hopefully the only use-case nowadays is causing spurious test suite successes when messing up the seccomp filter during development. Let's try removing it. Change-Id: Ibe51416d9c7a6dd635c2282990224861adf1ceab