| 11 Feb 2025 |
 @r522:matrix.org | that being said: unless you're doing encryption, you could define hashes to be over the uncompressed content | 13:26:44 |
 pveierland | It was just something I was thinking about since I was doing some stuff with binary build caches. E.g. nix binary caches sets the file name of a compressed NAR based on the file hash of the compressed NAR, meaning that when the compression is not reproducible, you cannot directly infer the location of the data, but need to depend on metadata | 13:38:30 |
 Martin Schwaighofer | In reply to @pveierland:matrix.org
It was just something I was thinking about since I was doing some stuff with binary build caches. E.g. nix binary caches sets the file name of a compressed NAR based on the file hash of the compressed NAR, meaning that when the compression is not reproducible, you cannot directly infer the location of the data, but need to depend on metadata If you want to associate a computation with its outcome, but not run the computation yourself, you always need to rely on some metadata for that association.
That's not only true for the kind of compression you describe, but also for the build steps themselves, even with content-addressed derivations in Nix. | 14:13:40 |
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| 12 Feb 2025 |
| pveierland | In reply to @mschwaig:matrix.org
If you want to associate a computation with its outcome, but not run the computation yourself, you always need to rely on some metadata for that association.
That's not only true for the kind of compression you describe, but also for the build steps themselves, even with content-addressed derivations in Nix. It does seem to change certain thing however, as e.g. binary caches now store NARs with file names based on the hash of the compressed NAR, as the contents of the stored file will be different based on the compression used. If a deterministic compression was used, different caches would store the same files for the same payload data, making it possible to have consistent file names and contents, which could simplify some syncing and lookups | 02:33:11 |
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 Fernando Rodrigues | raboof Mind if we discuss something in a DM? | 23:29:12 |
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| tessyjames | Hello NixOS Community
My name is Theresa James from Nigeria and am excited to join this space. I am part of Outreachy 2025 contributors and am exploring NixOS and Nix package manager to learn and deepen my understanding of functional package management and reproducible build.
This is my first time contributing to FOSS and am eager to learn from the community. I am interested on Kitty Nixpkgs and will start to reproduce and build the package once I setup my environment.
Thanks and I look forward to collaborating with you guys. | 21:14:35 |
 raboof | Awesome, welcome! | 22:18:24 |
| 19 Mar 2025 |
| tessyjames | In reply to @raboof:matrix.org
Awesome, welcome! Thanks π | 02:34:24 |
