eval caches are not used by actual eval at all, only by the flake-shaped
wrappers around evaluation. moving caches into a subclass both clarifies
that eval caches and eval states are coupled and separates concerns that
should not have been intermixed as they were here. in the future we will
want to split up and decouple things even further. that'll have to wait.
Change-Id: I7b69510c0f8b212f05fae62e7b992d9475b4841f
installables already have a ref<EvalState>. why are we passing the same
eval state in again, by reference, everywhere? that's just unnecessary.
Change-Id: I8225ea2575146edc55d283c0b5173b804553ceec
It was never intended to be a feature to be used, and moreover it is
inconsistent: One cannot override `+`, and overriding `__lessThan` won't
affect the builtins which do comparisons.
Change-Id: Iaba54a05aa4c2eb37cdb3dc0d731fcee5a86deba
this belongs to lazy trees, which we neither have nor intend to have.
we will keep SourcePath as that may come in handy at some later date.
Change-Id: I44b8f1dd6c435d7486c393fabdcd272766b2b56b
this also fixes a debugger bug where leaving the debugger does not clean
up old debugger state completely. in such cases the fake frame withFrame
created was left behind after the corresponding caller frame was unwound
Change-Id: I45adcd116276b03b2f87076518c9eae6fe844e06
checking whether a repl hook is set does not tell whether it's running,
which in turn means we will enter a debug repl even when not debugging.
this is not very useful when we have no debug frames to inspect at all,
as commonly happens when starting a new repl with --debugger specified.
Change-Id: I7065dc4ec29743bdd53ed99c29d6592e2ceea89c
just to keep debug-related state closer together. eventually this will
also allow us to not allocate debugger state altogether unless needed.
Change-Id: Id83fea75d96d0ecbe21683cb1b57dd5b11b13535
not all of these are even used by eval itself. notably sWith wasn't used
at all, sEpsilon was only used by the eval cache one layer up, and other
attributes are used in places even further away from eval itself. we can
keep this commingling for now, but eventually we should clean it up too.
Change-Id: I5684ac614361bf008e04472130c6c02082b4c2d7
these do not rely on the GC being initialized. there's no reason for
them to not be statics, shared between all eval states in a process.
Change-Id: Ib9675f3945d3a0a7097d6c85096adcbd6f441d83
currently ref<>s are used to share eval states between whatever created
that state and the various repl instances. repls however do not own any
eval states, not even partially. they only provide interactive use of a
previously allocated state that is owned by something else, notably for
debug repls which are run from *within* an evaluation which may already
be wrapped by another repl instance. presumably this was originally set
up like this to guarantee memory safety, even though it's never needed.
Change-Id: I29a2cd1d4245c077f9270452a0873d4c47448729
there's no reason to ever *own* a repl instance. everything either wants
to run a repl and receive the result of that run, or run a repl and then
totally ignore the result. allowing non-transient repl instances doesn't
do anything useful for us, unless making ownership analysis hard counts.
this also fixes a bug in which a repl could ignore the store it was told
to use during construction, using the one returned by openStore instead.
this never showed up in lix because openStore() was always passed anyway
Change-Id: If2b1ad24ab74377340199b36af1dd629d7ce3f25
give legacy commands their program name and c++-converted argv directly
instead of passing on the (argc, argv) pair untouched. all are required
to process these things, and all of them do it in exactly the same way.
we can also remove a few old helpers only used to make this less awful.
Change-Id: I4ecd02343bca0cf85faf6fe043031d4f64c5f29c
it's a trap. it's always a trap. non-default ctors of virtual base
classes must be called with the same parameters every time or very
surprising things will happen. good luck if you virtually derive a
class more than once with different ctor arguments. that'll break.
Change-Id: I1345963e69e98f37c3cbd070bae164d89eade455
this does nothing on classes that are never used as base classes and
have only a single base class of their own. all of these classes are
also made final to prove that they are indeed in this category. once
we need to derive any of them we can erase their `final` specifiers.
Change-Id: I4bd8e50a58815227392b5a5a762fda4542d15bae
there are no uses of plain MultiCommand as a base class *except* in
NixArgs, which is the only one that does not implement run(). there
is not much of a reason not to implement a run member there though,
so let's just do that and get rid of this weird intermediate class.
Change-Id: Ie84e3acd071b43bc186a2bac87646cbfb3aff845
the very slight speedup in config setting access is not worth the
maintenance overhead of conflating concers like this. the virtual
inheritance scheme used for configs requires too much duplication
of base class constructor arguments to be worth doing. perhaps we
should get rid of all virtual inheritance of data-membered bases?
Change-Id: I4acf5ceaedb4ed7476efe1114c2e065ec72d2c6d
clangd broke because it can't look through symlinks. compile_commands
manipulation does not fix it, clangd configuration does not fix it, a
vfs overlay does not fix it, and while a combination of those can fix
it with a bind mount in place that's just too cursed to even consider
clangd bug: https://github.com/llvm/llvm-project/issues/116877
Change-Id: I8e3e8489548eb3a7aa65ac9d12a5ec8abf814aec
Ever read gdb output and you just kinda get a headache because you have
to infer what a thread is by reading the stack trace? It's not hard, but
we could also just never have to do that again, which is also not hard.
Sample:
(gdb) info thr
Id Target Id Frame
* 1 LWP 3719283 "nix-daemon" 0x00007e558587da0f in accept ()
from target:/nix/store/c10zhkbp6jmyh0xc5kd123ga8yy2p4hk-glibc-2.39-52/lib/libc.so.6
2 LWP 3719284 "signal handler" 0x00007e55857b2bea in sigtimedwait ()
from target:/nix/store/c10zhkbp6jmyh0xc5kd123ga8yy2p4hk-glibc-2.39-52/lib/libc.so.6
The API design for this is forced by the macOS pthread_setname_np only
being able to change the current thread's name, but if we just conform
everything to that, it works everywhere.
Change-Id: I2b1d6ed41e3c94170cb0b4e73ad66f239ebd9c88
give the transfer progress callback a chance to register all transfers
as aborted when an interrupt event occurs. checkInterrupt() will throw
an Interrupted exception if an interrupt signal was caught, which will
immediately break out of the curl loop. it isn't even necessary within
the curl main loop as curl guarantees to call progress callbacks about
once per second (or more often), and we already abort transfers from a
progress update if a signal was caught. this may delay shutdown a bit,
but "about one second" as should not be noticeable in most situations.
fixes#577
Change-Id: Ida4e72732562bdf6560e4f182ecdcdb663c6dda5
This allows <lix/*> includes to work from external projects not taking
Lix as a buildInput with Nix, but just using pkg-config.
Change-Id: I5b24fd0981344b013beaf406c16988dad17f0edb
Context: we have include paths that are "types.hh" and similarly common
names. We currently have these compatibly available as
"lix/libutil/types.hh" externally but *not yet internally*. This is
because we don't have any way for the src directory to appear as
`"lix/"` from inside of Lix: the lix/ include directory is created by
the install process.
The goal of this whole thing is to make it clearer which component of
Lix that files are a part of, which should hopefully help at least a
little bit to new developers. One disadvantage of un-mixing these is
that it will cause some API changes if we ever move a file between
libraries, but that is not very common, and we don't care that much
about external API users.
This was planned for a while and is why we have a FixIncludes check to
begin with.
Personally I don't see a great benefit in rearranging our source code,
and in fact, it would probably be counterproductive:
- Moving the includes into a separate `include/` directory would just
make developers have to deal with more directories, when we can
already generate the desired layout through the build process.
- This would also decouple the .cc and .hh files which currently
conventionally have each others' definitions and declarations
respectively, right next to each other, making it easier for them to
feel decoupled and diverge.
Content: Add ../include as an include directory so that lix/ in include
paths will resolve to src/ within Lix itself, just as it does externally
today. This prepares for a further series of commits applying the actual
change to each library one-by-one by accepting both include versions at
once.
This could have been done with ../ and a symlink called lix, but we
would like to not accept libexpr/foo.hh internally for it would be
broken externally, so we need an otherwise empty directory for the
include.
Change-Id: Ideac17faadae2bcea2dffbab34eb27c582ede399
transferComplete has outlived its usefulness, and the other two phases
can be a boolean flag telling us whether we're still receiving headers
Change-Id: Ia943f95dcf0ce8ee2cc6d0f44ddf13151aef4346
things can be much simpler if the read loop knows whether the transfer
is done or not. this information is available, let's pass it back down
Change-Id: Idb99afeb06a0d7a0999c3f4a1c6ce5adeab5f054
file:// urls are no longer handled by curl itself, and this is supposed
to test the curl wrapper. use http to force the wrapper to be involved.
Change-Id: Ib13087db07b3b2f1ae44ce8e3ec7a96d935b1bab
they don't need these any more if we consider unpausing and cancelling
of transfers a cooperative affair between transfers and the curl_multi
handler. we can also remove an enable_shared_from_this base class now.
Change-Id: Iefa380df60c0cada53719cdaa500bab953892319
wrap all curl pointers in unique pointers for move correctness. the
destructor of TransferItem can go away completely since it does not
do anything special any more: memory bookkeeping is done using raii
wrappers, and its effects on the transfer state are not observable.
only TransferSource inspects the result, and even it does not check
for transfer results in its own destructor (only during transfers).
Change-Id: Ibb58484703854d5d5425e7c63cf2985d93920e97
eldritch horrors
piegames
jade
