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Lazy trees v2#9

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Mic92 wants to merge 14 commits intomainfrom
lazy-trees-v2
Open

Lazy trees v2#9
Mic92 wants to merge 14 commits intomainfrom
lazy-trees-v2

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@Mic92 Mic92 commented May 21, 2025

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Mic92 and others added 12 commits May 21, 2025 07:35
Signed-off-by: Jörg Thalheim <null>
* type hints
* use argparse
* use pathlib
* use TemporaryDirectory
This introduces a new release script for nix-based releases.
Compared to the old version this improves the following aspects:

- fully type checked
- no longer depends on beeing executed on eelco's work station
- no dependency on the third-party libraries compared to the old version
  (aws, LWP, json parser etc.)
- self-test and dry run mode to test releases without having specific
  access to release buckets or docker registry.
  The results of a release can be visually inspected and debugged locally.
- improved error handling and logging
- ci-friendly: all dependencies are managed by nix and locked by the local flake
- no dependency on an external docker daemon by using podman
- more arguments and documented help to publish releases in different buckets/registry
This allows to force colors but not disable other features such as the
progress bar. This is for instance useful in CI environments.

Adapted from
https://git.lix.systems/lix-project/lix/commit/378ec5fb0611e314511a7afc806664205846fc2e
and others.
* It is tough to contribute to a project that doesn't use a formatter,
* It is extra hard to contribute to a project which has configured the formatter, but ignores it for some files
* Code formatting makes it harder to hide obscure / weird bugs by accident or on purpose,

Let's rip the bandaid off?

Note that PRs currently in flight should be able to be merged relatively easily by applying `clang-format` to their tip prior to merge.
@Mic92 Mic92 force-pushed the lazy-trees-v2 branch 2 times, most recently from 4fa8bfd to fdac4cd Compare May 21, 2025 05:47
edolstra and others added 2 commits May 21, 2025 07:50
This adds a setting 'lazy-trees' that causes flake inputs to be
"mounted" as virtual filesystems on top of /nix/store as random
"virtual" store paths. Only when the store path is actually used as a
dependency of a store derivation do we materialize ("devirtualize")
the input by copying it to its content-addressed location in the
store.

String contexts determine when devirtualization happens. One wrinkle
is that there are cases where we had store paths without proper
contexts, in particular when the user does `toString <path>` (where
<path> is a source tree in the Nix store) and passes the result to a
derivation. This usage was always broken, since it can result in
derivations that lack correct references. But to ensure that we don't
change evaluation results, we introduce a new type of context that
results in devirtualization but not in store references. We also now
print a warning about this.
this is so we can see what would break.
@Mic92 Mic92 force-pushed the main branch 5 times, most recently from 13cf8ba to 41e78e7 Compare May 30, 2025 07:20
@Mic92 Mic92 force-pushed the main branch 2 times, most recently from 457eace to 96adedf Compare June 6, 2025 08:13
Mic92 added a commit that referenced this pull request Jun 11, 2025
We now see exception beeing thrown when remote building in master
because of writing to a non-blocking file descriptor from our json logger.

> #0  0x00007f2ea97aea9c in __pthread_kill_implementation () from /nix/store/wn7v2vhyyyi6clcyn0s9ixvl7d4d87ic-glibc-2.40-36/lib/libc.so.6
> #1  0x00007f2ea975c576 in raise () from /nix/store/wn7v2vhyyyi6clcyn0s9ixvl7d4d87ic-glibc-2.40-36/lib/libc.so.6
> #2  0x00007f2ea9744935 in abort () from /nix/store/wn7v2vhyyyi6clcyn0s9ixvl7d4d87ic-glibc-2.40-36/lib/libc.so.6
> #3  0x00007f2ea99e8c2b in __gnu_cxx::__verbose_terminate_handler() [clone .cold] () from /nix/store/ybjcla5bhj8g1y84998pn4a2drfxybkv-gcc-13.3.0-lib/lib/libstdc++.so.6
> #4  0x00007f2ea99f820a in __cxxabiv1::__terminate(void (*)()) () from /nix/store/ybjcla5bhj8g1y84998pn4a2drfxybkv-gcc-13.3.0-lib/lib/libstdc++.so.6
> #5  0x00007f2ea99f8275 in std::terminate() () from /nix/store/ybjcla5bhj8g1y84998pn4a2drfxybkv-gcc-13.3.0-lib/lib/libstdc++.so.6
> #6  0x00007f2ea99f84c7 in __cxa_throw () from /nix/store/ybjcla5bhj8g1y84998pn4a2drfxybkv-gcc-13.3.0-lib/lib/libstdc++.so.6
> #7  0x00007f2eaa5035c2 in nix::writeFull (fd=2, s=..., allowInterrupts=true) at ../unix/file-descriptor.cc:43
> #8  0x00007f2eaa5633c4 in nix::JSONLogger::write (this=this@entry=0x249a7d40, json=...) at /nix/store/4krab2h0hd4wvxxmscxrw21pl77j4i7j-gcc-13.3.0/include/c++/13.3.0/bits/char_traits.h:358
> #9  0x00007f2eaa5658d7 in nix::JSONLogger::logEI (this=<optimized out>, ei=...) at ../logging.cc:242
> #10 0x00007f2ea9c5d048 in nix::Logger::logEI (ei=..., lvl=nix::lvlError, this=0x249a7d40) at /nix/store/a7cq5bqh0ryvnkv4m19ffchnvi8l9qx6-nix-util-2.27.0-dev/include/nix/logging.hh:108
> #11 nix::handleExceptions (programName="nix", fun=...) at ../shared.cc:343
> #12 0x0000000000465b1f in main (argc=<optimized out>, argv=<optimized out>) at /nix/store/4krab2h0hd4wvxxmscxrw21pl77j4i7j-gcc-13.3.0/include/c++/13.3.0/bits/allocator.h:163
> (gdb) frame 10
> #10 0x00007f2ea9c5d048 in nix::Logger::logEI (ei=..., lvl=nix::lvlError, this=0x249a7d40) at /nix/store/a7cq5bqh0ryvnkv4m19ffchnvi8l9qx6-nix-util-2.27.0-dev/include/nix/logging.hh:108
> 108             logEI(ei);

So far only drainFD sets the non-blocking flag on a "readable" file descriptor,
while this is a "writeable" file descriptor.
It's not clear to me yet, why we see logs after that point, but it's
also not that bad to handle EAGAIN in read/write functions after all.

(cherry picked from commit 2790f5f)
Mic92 pushed a commit that referenced this pull request Jun 11, 2025
This makes it behave the same as nix-daemon. Opening the store in the
parent can cause a SIGBUS in libsqlite in the child:

  #0  0x00007f141cf6f789 in __memset_avx2_unaligned_erms () from /nix/store/wn7v2vhyyyi6clcyn0s9ixvl7d4d87ic-glibc-2.40-36/lib/libc.so.6
  #1  0x00007f141c322fe8 in walIndexAppend () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #2  0x00007f141c3711a2 in pagerWalFrames () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #3  0x00007f141c38317e in sqlite3PagerCommitPhaseOne.part.0 () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #4  0x00007f141c383555 in sqlite3BtreeCommitPhaseOne.part.0 () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #5  0x00007f141c384797 in sqlite3VdbeHalt () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #6  0x00007f141c3b8f60 in sqlite3VdbeExec () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #7  0x00007f141c3bbfef in sqlite3_step () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #8  0x00007f141c3bd0e5 in sqlite3_exec () from /nix/store/bbd59cqw259149r2ddk4w1q0lr2fch8c-sqlite-3.46.1/lib/libsqlite3.so.0
  #9  0x00007f141da140e0 in nix::SQLiteTxn::commit() () from /nix/store/1m4r8s7s1v54zq9isncvjgia02bffxlz-determinate-nix-store-3.1.0/lib/libnixstore.so
  #10 0x00007f141d9ce69c in nix::LocalStore::registerValidPaths(std::map<nix::StorePath, nix::ValidPathInfo, std::less<nix::StorePath>, std::allocator<std::pair<nix::StorePath const, nix::ValidPathInfo> > > const&)::{lambda()#1}::operator()() const () from /nix/store/1m4r8s7s1v54zq9isncvjgia02bffxlz-determinate-nix-store-3.1.0/lib/libnixstore.so

(cherry picked from commit 9590167)
@Mic92 Mic92 force-pushed the main branch 3 times, most recently from b2dcebb to 1a7b905 Compare June 12, 2025 15:10
@Mic92 Mic92 force-pushed the main branch 3 times, most recently from f6ae2c2 to d53fd41 Compare November 3, 2025 17:18
@Mic92 Mic92 force-pushed the main branch 9 times, most recently from 9aa9ef9 to cb9ce1e Compare December 8, 2025 19:23
@Mic92 Mic92 force-pushed the main branch 5 times, most recently from 3cd12df to 9f7e9c8 Compare December 18, 2025 07:18
@Mic92 Mic92 force-pushed the main branch 3 times, most recently from 1739009 to 2046c1c Compare January 20, 2026 07:41
@Mic92 Mic92 force-pushed the main branch 2 times, most recently from 9887b1e to 0ae1719 Compare January 25, 2026 13:07
@Mic92 Mic92 force-pushed the main branch 5 times, most recently from b95d840 to 44e6d4c Compare February 24, 2026 10:50
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4 participants