This avoids C++'s standard library regexes, which aren't the same
across platforms, and have many other issues, like using stack
so much that they stack overflow when processing a lot of data.
To avoid backwards and forward compatibility issues, regexes are
processed using a function converting libstdc++ regexes into Boost
regexes, escaping characters that Boost needs to have escaped, and
rejecting features that Boost has and libstdc++ doesn't.
Related context:
- Original failed attempt to use `boost::regex` in CppNix, failed due to
boost icu dependency being large (disabling ICU is no longer necessary
because linking ICU requires using a different header file,
`boost/regex/icu.hpp`): https://github.com/NixOS/nix/pull/3826
- An attempt to use PCRE, rejected due to providing less backwards
compatibility with `std::regex` than `boost::regex`:
https://github.com/NixOS/nix/pull/7336
- Second attempt to use `boost::regex`, failed due to `}` regex failing
to compile (dealt with by writing a wrapper that parses a regular
expression and escapes `}` characters):
https://github.com/NixOS/nix/pull/7762Closes#34. Closes#476.
Change-Id: Ieb0eb9e270a93e4c7eed412ba4f9f96cb00a5fa4
nixpkgs delivered us the untimely gift of a meson 1.5 upgrade, which
*does* make our lives easier by allowing us to delete wrap generation
code, but it does so at the cost of renaming all rust crates in such a
way that the wrap logic cannot tolerate the new names on the old meson
version 😭.
It also means that support burden for this is going to be atrocious
until we either give in and vendor meson 1.5 or we make a CI target for
it. Neither seems appealing, though the latter is not super absurd for
ensuring we don't break nixpkgs unstable.
This commit causes meson 1.5 to ignore the .wrap files in subprojects/
entirely (since they have the wrong names lol) and instead use
Cargo.lock, so it now hard-depends on our workspace reshuffling
improvement.
It also deletes the hack that we were using to get the sources of Cargo
deps into meson by using a feature that went unnoticed when this code
was originally written: MESON_PACKAGE_CACHE_DIR:
8a202de6ec/mesonbuild/wrap/wrap.py (L490-L502)
Change-Id: I7a28f12fc2812c6ed7537b60bc3025c141a05874
This is purely to let Cargo's dependency resolver do stuff for us, we do
not actually intend to build this stuff with Cargo to begin with.
Change-Id: I4c08d55595c7c27b7096375022581e1e34308a87
lix-doc is now built with Meson, with lix-doc's dependencies built as
Meson subprojects, either fetched on demand with .wrap files, or fetched
in advance by Nix with importCargoLock. It even builds statically.
Fixes#256.
Co-authored-by: Lunaphied <lunaphied@lunaphied.me>
Co-authored-by: Jade Lovelace <lix@jade.fyi>
Change-Id: I3a4731ff13278e7117e0316bc0d7169e85f5eb0c
Closes#460
I managed to trigger the issue by having the following inputs (shortened):
authentik-nix.url = "github:nix-community/authentik-nix";
authentik-nix.inputs.poetry2nix.inputs.nixpkgs.follows = "nixpkgs";
When evaluating this using
nix-eval-jobs --flake .#hydraJobs
I got the following error:
error: cannot update unlocked flake input 'authentik-nix/poetry2nix' in pure mode
The issue we have here is that `authentik-nix/poetry2nix` was written
into the `overrideMap` which caused Nix to assume it's a new input and
tried to refetch it (#460) or errored out in pure mode
(nix-eval-jobs / Hydra).
The testcase unfortunately only involves checking for the output log
and makes sure that something *is* logged on the first fetch so that
the test doesn't rot when the logging changes since I didn't
manage to trigger the error above with the reproducer from #460. In
fact, I only managed to trigger the `cannot update unlocked flake input`
error in this context with `nix-eval-jobs`.
Change-Id: Ifd00091eec9a0067ed4bb3e5765a15d027328807
this can be a proper WorkResult now. childTerminated is unfortunately a
lot more stubborn and won't be made private for quite a while yet. once
we can get rid of the Worker poll loop that *should* be possible though
Change-Id: I2218df202da5cb84e852f6a37e4c20367495b617
we'll need this once we want to pass extra information out of accepting
replies, such as fd sets or possibly even async output reader promises.
Change-Id: I5e2f18cdb80b0d2faf3067703cc18bd263329b3f
don't keep fds open we're not using. currently this does not cause any
problems, but it does increase the size of our fd table needlessly and
in the future, when we have proper async processing, having builderOut
open in the daemon once the hook has been fully started is problematic
Change-Id: I6e7fb773b280b042873103638d3e04272ca1e4fc
this is useless to do on the face of it, but it'll make it easier to
convert the entire output handling to use async io and promises soon
Change-Id: I2d1eb62c4bbf8f57bd558b9599c08710a389b1a8
only DerivationGoal can set the hook to anything at all. it always sets
buildOutFD to something that is not related to fromHook in any way, and
mixing the two would have rather dire consequences for log consistency.
Change-Id: Ida86727fd1cd5e1ecd78f07f3bde330a346658a8
all derivation goals need a log fd of some description. let's save this
single fd in a dedicated pointer field for all subclasses so that later
we have just the one spot to change if we turn this into async promises
Change-Id: If223adf90909247363fb823d751cae34d25d0c0b
we don't need to expose information about how busy a Worker is if the
worker can instead tell its work items whether they are in a slot. in
the future we might use this to not start items waiting for a slot if
no slots are currently available, but that requires more preparation.
Change-Id: Ibe01ac536da7e6d6f80520164117c43e772f9bd9
They are like experimental features, but opt-in instead of opt-out. They
will allow us to gracefully remove language features. See #437
Change-Id: I9ca04cc48e6926750c4d622c2b229b25cc142c42
Seems a little bit Rich that musl does not implement close_range because
they suspect that the system call itself is a bad idea, so they uhhhh
are considering not implementing a wrapper. Let's just fix the problem
at hand by writing our own wrapper.
Change-Id: I1f8e5858e4561d58a5450503d9c4585aded2b216
Turns out strings do not like being resized to -4.
This was discovered while messing with the tests to remove unbuffer and
trying stdbuf instead. Turns out that was not the right approach.
This basically rewrites the handling of this case to be much more
correct, and fixes a bug where with small window sizes where it would
ALSO truncate the attr names in addition to the optional descriptions.
Change-Id: Ifd1beeaffdb47cbb5f4a462b183fcb6c0ff6c524
This will stop printing stuff to dumb terminals that they don't support.
I've overall audited usage of isatty and replaced the ones with intent
to mean "is a Real terminal" with checking for that. I've also caught a
case of carelessly assuming "is a tty" means "should be colour" in
nix-env.
Change-Id: I6d83725d9a2d932ac94ff2294f92c0a1100d23c9
this is only used to close non-stdio files in derivation sandboxes. we
may as well encode that in its name, drop the unnecessary integer set,
and use close_range to deal with the actual closing of files. not only
is this clearer, it also makes sandbox setup on linux fast by 1ms each
Change-Id: Id90e259a49c7bc896189e76bfbbf6ef2c0bcd3b2
implementing a build hook is pretty much impossible without either being
a nix, or blindly forwarding the important bits of all build requests to
some kind of nix. we've found no uses of build-hook in the wild, and the
build-hook protocol (apart from being entirely undocumented) is not able
to convey any kind of versioning information between hook and daemon. if
we want to upgrade this infrastructure (which we do), this must not stay
Change-Id: I1ec4976a35adf8105b8ca9240b7984f8b91e147e
this is a bit of a hack, but it's apparently the cleanest way of doing
this in the absence of any kind of priority/provenance information for
values of some given setting. we'll need this to deprecate build-hook.
Change-Id: I03644a9c3f17681c052ecdc610b4f1301266ab9e
sure, linux has been providing argv[0] by default for a while now. other
OSes may not be as forthcoming though, and relying on the OS to create a
world in which we can just make assumptions we could test for instead is
unnecessarily lazy. we *could* default argv0, but that's a little silly.
notably we abort instead of returning normally to avoid confusions where
a caller interprets our exit status like a Worker build results bitmask.
Change-Id: Id73f8cd0a630293b789c59a8c4b0c4a2b936b505
* changes:
sqlite: add a Use::fromStrNullable
util: implement charptr_cast
tree-wide: fix a pile of lints
refactor: make HashType and Base enum classes for type safety
build: integrate clang-tidy into CI
There were several usages of the raw sqlite primitives along with C
style casts, seemingly because nobody thought to use an optional for
getting a string or NULL.
Let's fix this API given we already *have* a wrapper.
Change-Id: I526cceedc2e356209d8fb62e11b3572282c314e8
I don't like having so many reinterpret_cast statements that have to
actually be looked at to determine if they are UB. A huge number of the
reinterpret_cast instances in Lix are actually casting to some pointer
of some character type, which is always valid no matter the source type.
However, it is also worth looking at if it is not casting both *from* a
character type and also *to* a character type, since IMO splatting a
struct into a character array should be a very deliberate action instead
of just being about dealing with bad APIs.
So let's write a template that encapsulates this invariant so we can
not worry about the trivially safe reinterpret_cast invocations.
Change-Id: Ia4e2f1fa0c567123a96604ddadb3bdd7449660a4
This:
- Converts a bunch of C style casts into C++ casts.
- Removes some very silly pointer subtraction code (which is no more or
less busted on i686 than it began)
- Fixes some "technically UB" that never had to be UB in the first
place.
- Makes finally follow the noexcept status of the inner function. Maybe
in the future we should ban the function from not being noexcept, but
that is not today.
- Makes various locally-used exceptions inherit from std::exception.
Change-Id: I22e66972602604989b5e494fd940b93e0e6e9297
This still has utterly unacceptably bad output format design that I
would not inflict on anyone I like, but it *does* now exist, and you
*can* find the errors in the log.
Future work would obviously be to fix that and integrate the actual
errors into Gerrit using codechecker or so.
Followup issue: lix-project/lix#457
Fixes: lix-project/lix#147
Change-Id: Ifca22e443d357762125f4ad6bc4f568af3a26c62
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