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Nix Hackers

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13 Oct 2025
@mrdev023:matrix.orgmrdev023 I can't join it K900 .... 17:17:15
@mrdev023:matrix.orgmrdev023My bad just a matrix bug17:17:44
@perpetrator1:matrix.org@perpetrator1:matrix.org left the room.19:22:59
@Ericson2314:matrix.orgJohn Ericson Robert Hensing (roberth): does nix eval override the "always trace" thing? 20:47:57
@roberthensing:matrix.orgroberth John Ericson: The problem there is that printValue only prints the "final" line, which is quite sensible, considering that it may print many "values" that throw 20:49:08
@Ericson2314:matrix.orgJohn Ericson Robert Hensing (roberth): this is implemented in the Printer class thing? 20:50:38
@roberthensing:matrix.orgroberthyeah20:50:50
@Ericson2314:matrix.orgJohn EricsonI would hope it could be more "semantic" and not just chop an error at one line?20:51:11
@roberthensing:matrix.orgroberthfor sure, it's the exception message without the traces20:51:57
@Ericson2314:matrix.orgJohn Ericson printError_ in this? 20:52:13
@Ericson2314:matrix.orgJohn Ericson Robert Hensing (roberth): OK throwing in the towel on tracing :) 21:01:00
@Ericson2314:matrix.orgJohn EricsonI left comments for the storing of the reason21:01:10
@Ericson2314:matrix.orgJohn Ericsonit should be very easy21:01:12
14 Oct 2025
@douglasfunster:matrix.orgdouglasfunster joined the room.10:42:38
@sigmasquadron:matrix.orgSigmaSquadron joined the room.12:46:23
@joerg:thalheim.ioMic92https://www.phoronix.com/news/Fedora-Nix-Dir-Approved21:08:35
15 Oct 2025
@fzakaria:one.ems.hostfzakariaoh00:28:16
@fzakaria:one.ems.hostfzakariawow00:28:16
@fzakaria:one.ems.hostfzakaria

is there a way to make this more comprehnsible why it happens

[1/0/1 copied (176.7/176.7 MiB), 29.1 MiB DL] fetching source from https://cache.nixos.org

00:30:23
@fzakaria:one.ems.hostfzakariaI would be down to work on that..00:49:13
@joerg:thalheim.ioMic92What do you mean? 06:25:52
@joerg:thalheim.ioMic92
In reply to @justinrestivo:matrix.org
Hello! Any chance there's a spec about the different Fields provided for each ActivityType in the nix logger? Right now to answer this question I'm grepping the nix codebase for each ActivityType and looking at the arguments to the Activity::Activity constructor to infer the field types and number (if any exist). I'm wondering if there's an easier/more canonical way to do this.
I don't think so. There is maybe nix-output-monitor. I think also https://github.com/Thymis-io/thymis had a parser somewhere
06:32:47
@maralorn:maralorn.demaralorn justinrestivo: This might help. https://github.com/maralorn/nix-output-monitor/blob/main/lib/NOM/Parser/JSON.hs 07:44:59
@maralorn:maralorn.demaralornThough note that the nom parser trys to be the union of the codes that nix, lix and determinate nix emit.07:45:41
@fzakaria:one.ems.hostfzakariaLike can it say "Git cache is out of date" or "Tarball expires" or w/e is causing the fetching source.13:18:00
@fzakaria:one.ems.hostfzakaria* Like can it say "Git cache is out of date" or "Tarball expires" or w/e is causing the fetching source. (I'm thinking it's a flake input fetch although it writes "source fetch")13:18:49
@roberthensing:matrix.orgroberth Sergei Zimmerman (xokdvium): wdyt? https://github.com/libgit2/libgit2/compare/main...roberth:libgit2:refs-shorthand-multi-segment?expand=1 16:00:58
@xokdvium:matrix.orgSergei Zimmerman (xokdvium)
In reply to @roberthensing:matrix.org
Sergei Zimmerman (xokdvium): wdyt? https://github.com/libgit2/libgit2/compare/main...roberth:libgit2:refs-shorthand-multi-segment?expand=1
Hmm, I was thinking that maybe for our use-case we could also just use is_valid_branch_name in conjunction with is_valid_reference_name instead of the whole normalization dance? Though yeah, this does seem like an oversight in libgit2 as well
16:33:40
@roberthensing:matrix.orgroberthI guess I could open that PR as an alternative if those two functions don't work out?16:35:03
@xokdvium:matrix.orgSergei Zimmerman (xokdvium)
In reply to @roberthensing:matrix.org
I guess I could open that PR as an alternative if those two functions don't work out?
Let’s see how upstream reacts. They’be been ignoring my DEL patch for quite some time now
16:37:13

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