It being overridable was an intended feature with good use cases, and
should not have been removed. However, this feature is generally in a
bad state and needs revisiting in the future.
Fixup for 81d5f0a7d9Fixes#599
Change-Id: I2d93e012caa65aa795bce3a71d8e56d7052ef9df
Calls to `show` have been removed. To counter the loss of information,
the error positions have been improved and now correctly point to the
current selector instead of the entire select expression.
Change-Id: I4771fe874af1ac15828a9863550cd4369a8f0e94
The `show` functionality needs to be removed because it is deeply
flawed, and given that we already print position information in the
error message (which probably wasn't always the case in the past) the
assertion printing is redundant anyways.
Change-Id: I1f5e05ab73aaa0ec92994c2211463260fd374898
ExprLet was previously inheriting from ExprAttrs for the data, while
ignoring all
set-specific operations on it. The set specific code has now been split
off so that
let doesn't inherit it anymore:
- ExprAttrs (not an Expr), containing the attributes and the related
logic
- ExprLet : Expr, ExprAttrs
- ExprSet : Expr, ExprAttrs
Co-authored-by: eldritch horrors <pennae@lix.systems>
Change-Id: I63f2fbcd1e790b3cffb56eec1e7565ee3cdbf964
these must be tampered with before the evaluator is created, *never*
after. doing it any other way leads to interesting things like #596.
fixes#596
Change-Id: Iea253ccce44b94b1243833837a3df93c795967d9
this finally gives us a witness type we can use to prove that a certain
call graph subtree can't be used in kj promises using only a single new
assumption: if EvalState& is never held as a reference member of a type
and instead only ever passes as an argument or held on the stack we can
be certain that anything that has access to en EvalState ref must never
be run inside a promise and, crucially, that anything that doesn't have
access to an EvalState& *can* be run inside a promise without problems.
Change-Id: I6c15ada479175ad7e6cd3e4a729a5586b3ba30d6
this is not necessary in any way, but it will make the following changes
smaller and easier to review. the aliases could also be added piecemeal,
but doing it here lets us lean heavily on our compilers for correctness.
(teacher notes: here the author foreshadows the shape of things to come.
not all names change, and only the names unchanged are those which will,
over time, become ever more unrecognizable. note especially nix/main.cc,
where `state` is not only cloned, but itself changes pointerness. it can
be seen as a nod to the trans community, but more realistically it is no
more than foreshadowing the future where `state` is only seen by proxy.)
Change-Id: I7732025e58df089b7f8e564fc63960cd91729d09
this will let us pass the capability to create debuggable eval errors
without having to pass an entire EvalState. we could pass symbols and
debug states around just as easily, but if we add new capabilities to
our debugger we might have to change many more places than with this.
Change-Id: I2f8893012e5d98a986ef1fc888234c2dd8d5e096
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
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
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
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
this only ever worked for empty uploads, and there it worked only by
complete accident: curl was asked to send more data than the wrapper
would provide, which curl would not like and report as an error. the
error would cause a retry with even less data to send, until finally
failing by running into the retry limit. let's just forbid all this.
Change-Id: I229a94b3b8b33e2c6cdb8ea19edd57cd6740e6c6
This adds a new temp-dir setting for controlling the temporary directory
without having to change the TMPDIR env var. This can be used to e.g.
use a path on a case-sensitive store on macOS for temporary files
without changing the TMPDIR var used by interactive shells or commands
invoked with `nix run`.
This also stops unsetting `TMPDIR` on darwin when the env var value
starts with `/var/folders/`, preferring instead to just do the check
when reading `TMPDIR`. This way the inherited `TMPDIR` env var is
preserved for child processes (such as interactive shells).
As a side effect this changes the behavior of `nix-build -o ''` to act
like `nix-build --no-out-link` instead of failing with an error caused
by trying to create a symlink at the cwd.
Fixes: #253
Fixes: #112
Change-Id: I9ee826323f2deca62854715a77ca7a373a948a29
This reverts commit 02c35ea9df.
Reason for revert: this code path is also used for `Input::getRev()`, i.e. flakes VCS revision validation, which, in the case of Git, are using SHA1.
As a result, this cause too much noise due to SHA1 revisions in Flakes.
Change-Id: I8064c1ebc26e4e83b627f0803a7a9ba56cfe1f37
don't pause the entire curl thread. we have multiple consumer threads
after all, not just one, so stalling all of them is likely not great.
note that libcurl advises against using transfer pauses if compressed
encodings are allowed and automatically decoded. this should not lead
to problems in practice because our data is usually not compressed to
such a degree that curl buffering *uncompressed* data matters. should
this cause problems we can reintroduce the whole-thread pause, but we
will probably get away with this until the entire file transfer class
is made kj::Promise-using async (and *then* curl can be hardpaused if
it cannot get rid of its data, solving the problem once and for all).
Change-Id: I218e41bfa5a27c7454eafb0bdb54f2a29a7f6493
using UTF-8 bullets in the sample avoids locale confusion where Bash
doesn't know to treat `•` as a single character.
Signed-off-by: Dusk Banks <me@bb010g.com>
Change-Id: I829019b66e93e6d33ac3a6641df07d0dd2332a5a
It's only used in a couple of tests, and only in such a way that
replacing it with a random command suffices.
I also removed a few pointless uses of the variable.
Fixes: #376
Change-Id: I90aedb61d64b02f7c9b007e72f9d614cc1b37a2e
Before:
error: derivation '/nix/store/4spy3nz1661zm15gkybsy1h5f36aliwx-python3.11-test-1.0.0.drv' may not be deterministic: output '/nix/store/ccqcp01zg18wp9iadzmzimqzdi3ll08d-python3.11-test-1.0.0-dist' differs from '/nix/store/ccqcp01zg18wp9iadzmzimqzdi3ll08d-python3.11-test-1.0.0-dist.check'
After:
error: derivation '4spy3nz1661zm15gkybsy1h5f36aliwx-python3.11-test-1.0.0.drv' may not be deterministic: outputs differ
output differs: output '/nix/store/ccqcp01zg18wp9iadzmzimqzdi3ll08d-python3.11-test-1.0.0-dist' differs from '/nix/store/ccqcp01zg18wp9iadzmzimqzdi3ll08d-python3.11-test-1.0.0-dist.check'
output differs: output '/nix/store/yl59v08356i841c560alb0zmk7q16klb-python3.11-test-1.0.0' differs from '/nix/store/yl59v08356i841c560alb0zmk7q16klb-python3.11-test-1.0.0.check'
Change-Id: Ib2871fa602bf1fa9c00e2565b3a2e1b26f908152
it's no longer needed. `download` can do everything `enqueueDownload`
did, and a lot more. e.g. not block the calling thread, for instance.
Change-Id: I4b36235ed707c92d117b4c33efa3db50d26f9a84
return it as a separate item in a pair instead. this will let us remove
enqueueDownload() in favor of returning metadata from download() itself
Change-Id: I74fad2ca15f920da1eefabc950c2baa2c360f2ba
it's just a uri and some headers now. those can be function arguments
with no loss of clarity. *actual* additional arguments, for example a
TLS context with additional certificates, could be added on a new and
improved FileTransfer class that carries not just a backend reference
but some real, visible context for its transfers. curl not being very
multi-threading-friendly when using multi handles will make sharing a
bit hard anyway once we drop the single global download worker thread
Change-Id: Id2112c95cbd118c6d920488f38d272d7da926460
we don't even need this outside of tests. maybe we should not do
automatic retries at this level at all and use retrying wrappers
instead? at some point we may have to do this, but not just yet.
Change-Id: If0088aa55215be81f1770c25b3bb1b5268c65cf8
piegames
eldritch horrors
jade
Emilia Bopp
Lily Ballard
raito
Aria
Linus Heckemann
V.
Dusk Banks