| 21 Jul 2025 |
 emily | see https://matrix.to/#/!VRULIdgoKmKPzJZzjj:nixos.org/$ynuYm1cT2gUMemb4CiyueY7KlkO0yqppb8i9xb6ENJ8?via=nixos.org&via=matrix.org&via=nixos.dev for my attempts | 14:48:07 |
| emily | unfortunately to trace builtins.readFile you need scopedImport which slows things down a bunch | 14:48:23 |
 magic_rb | In reply to @emilazy:matrix.org
unfortunately to trace builtins.readFile you need scopedImport which slows things down a bunch Well, it would have to be done at the c++ level and the evaluator would have to become serializable for my idea to work | 14:54:00 |
| emily | yes, that would be better | 14:54:20 |
| emily | serializing eval state will be really hard and complicated. I'd recommend focusing on just smarter cache keys | 14:54:42 |
| emily | roberth | 14:54:53 |
| emily | oops | 14:54:56 |
| emily | roberth's proposal is basically what strace/preload/FUSE/etc. build systems do | 14:55:09 |
| emily | storing a log of "syscalls" and using that to cache builds | 14:55:33 |
| emily | but more major refactor than just "log the obvious places files are accessed and use those as part of a cache key". but the latter is fatal if you miss anything anywhere, because we end up back in make clean territory | 14:56:05 |
| emily | (that's why I was trying it for the direnv layer, where we already accept imperfection) | 14:58:49 |
 pveierland | Using nix repl 2.28.3 the following evaluates: { "foo" = 42; } however the following does not: { ''foo'' = 42; } and { https://foo = 42; } | 21:44:41 |
| pveierland | Are string literals used in names for attribute sets limited to the double quoted form? | 21:45:48 |
| pveierland | Based on the documentation it appears that any string should parse: https://nix.dev/manual/nix/2.30/language/identifiers.html?highlight=name#names | 21:46:38 |
 Sergei Zimmerman (xokdvium) | Attribute keys in the grammar can only be identifiers, strings or dynamic attributes (interpolation inside dollar curlies). https://github.com/NixOS/nix/blob/6ec50ba73664838993d645dc78c936542eb2012c/src/libexpr/parser.y#L485-L494 | 22:29:45 |
| Sergei Zimmerman (xokdvium) | So yeah, string literals are limited to double quotes. | 22:30:48 |
 fzakaria | i'm planning to pickup another FetchTree PR tonight; | 23:21:03 |
