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Lix Development

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(Technical) development of Lix, the package manager, a Nix implementation. Please be mindful of ongoing technical conversations in this channel.140 Servers

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3 Aug 2025
@raitobezarius:matrix.orgraitobezariuswe are a bit strained on x86 but that shall change soon I suppose16:19:41
@just1602:systemli.orgjust1602I was thinking about lix CI while listening to a podcast where someone from 0xide mention that a full rack has 2000 CPU core, 32TB of RAM and something like 250TB of storage.16:22:02
@just1602:systemli.orgjust1602I was like, just half a rack would be enough to fix all our CI issues16:22:12
@raitobezarius:matrix.orgraitobezariushahahahaha16:22:16
@raitobezarius:matrix.orgraitobezariusbut we don't have millions of euros on our hand alas16:22:22
@just1602:systemli.orgjust1602At some point, I hope they're gonna have enough client to sponsor some nice opensourc projects :D16:23:57
@aloisw:julia0815.dealoisw
In reply to @raitobezarius:matrix.org
we are a bit strained on x86 but that shall change soon I suppose
If you have enough aarch64 then I guess you could also do aarch64 -> x86_64 cross?
16:42:09
@raitobezarius:matrix.orgraitobezarius we do have more aarch64 16:42:20
@raitobezarius:matrix.orgraitobezariusat least, x86 is doing more work than aarch6416:42:25
@raitobezarius:matrix.orgraitobezariusso plausibly, this could be the job you described16:42:31
@raitobezarius:matrix.orgraitobezariusit will still generate more work for x86 which will have to calculate one more job at the nej phase16:42:43
@raitobezarius:matrix.orgraitobezariusbut not a compilation job at least16:42:48
@k900:0upti.meK900 But what if I add it to the goal loop 16:44:29
@aloisw:julia0815.dealoisw
In reply to @raitobezarius:matrix.org
it will still generate more work for x86 which will have to calculate one more job at the nej phase
Evaling one Lix should be quite cheap though?
16:48:19
@raitobezarius:matrix.orgraitobezarius
In reply to @aloisw:julia0815.de
Evaling one Lix should be quite cheap though?
Yeah, I didn't mean this as this would be much more expensive
16:48:44
@raitobezarius:matrix.orgraitobezariusbut cost for x86(after) > cost for x86(before)16:48:54
@raitobezarius:matrix.orgraitobezariusmaybe by epsilon16:48:56
@k900:0upti.meK900I am fully ready to commit crimes to make this happen and Lix won't even be the worst of them16:49:53
@k900:0upti.meK900I am making a thing to forward logind wakelocks from WSL to Windows16:50:06
@k900:0upti.meK900It is going to be VERY CURSED and I don't care16:50:20
@weethet:catgirl.cloudWeetHet raitobezarius: how do i read this?
https://buildkite.com/lix-project/lix/builds/3673/steps/canvas?sid=01986f84-2c33-4e02-9c8e-6ad9e83250c9
18:34:58
@commentator2.0:elia.gardenRutile (rootile) ma27: currenlty rebasing the nix framework rewrite and now your test is failing... there is a chance the code is broken and not the framework but not 100% sure, could you take a look at it?
https://gerrit.lix.systems/c/lix/+/3333/
18:50:36
@ma27:nicht-so.sexyma27can you link me a ci failure, please?19:05:00
@commentator2.0:elia.gardenRutile (rootile)

ci currently has issues with some of the changes

    
            assert nar_entries[0]["present"]
            assert nar_entries[0]["hashPart"] == hash_part
            assert nar_entries[0]["namePart"] == "test-file"
>           assert nar_entries[0]["url"] == store.uploaded_nars[hash_part]["URL"]
E           AssertionError: assert 'nar/14r07wnk...vxwm08idf.nar' == 'nar/snix-cas...?narsize=f128'
E             
E             - nar/snix-castore/00000000000000000000000000000000000000000000000000000?narsize=f128
E             + nar/14r07wnk5h2bl40v1nknwkwrzh5li7z4bl02vcsqh52vxwm08idf.nar

the relevant error log(?)

19:15:21
@commentator2.0:elia.gardenRutile (rootile)ok its starting to build now19:16:50
@commentator2.0:elia.gardenRutile (rootile)uhhhh i guess it works on the build machine?!19:28:02
@ma27:nicht-so.sexyma27

I repeatedly get now

>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'chmod'

from

    def nix(tmp_path: Path, env: ManagedEnv) -> Generator[Nix, Any, None]:
        """
        Provides a rich way of calling `nix`.
        For pre-applied commands use `nix.nix_instantiate`, `nix.nix_build` etc.
        After configuring the command, use `.run()` to run it
        """
        yield Nix(env)
        # when things are done using the nix store, the permissions for the store are read only
        # after the test was executed, we set the permissions to rwx (write being the important part)
        # for pytest to be able to delete the files during cleanup
        cmd = Command(argv=["chmod", "-R", "+w", str(tmp_path.absolute())], _env=env)
>       cmd.run().ok()

(yes, there's a chmod in the shell available and I killed the entire temp dir before)

so something looks pretty off here

20:04:10
@commentator2.0:elia.gardenRutile (rootile) are you using darwin?
otherwise do a just clean & just setup & just install
20:04:42
@ma27:nicht-so.sexyma27 ah and I misread the buildlog from the previous nix build of my checkout, it's not reproducible from within. 20:05:08
@ma27:nicht-so.sexyma27
In reply to @commentator2.0:elia.garden
are you using darwin?
otherwise do a just clean & just setup & just install
nope, linux. let me try...
20:05:57

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