| 26 Dec 2024 |
 Leonardo Santiago | * I've already managed to get some basic derivation parsing going on, and I can make the same changes that are done in the C++ side just fine, but there doesn't seem to be any way to write them back to the store? | 22:13:53 |
| Leonardo Santiago | * I'm specifically talking about $nix/src/nix/develop.cc#L285:
auto shellDrvPath = writeDerivation(*evalStore, drv);
/* Build the derivation. */
store->buildPaths(
{ DerivedPath::Built {
.drvPath = makeConstantStorePathRef(shellDrvPath),
.outputs = OutputsSpec::All { },
}},
bmNormal, evalStore);
| 22:14:09 |
| Leonardo Santiago | * I'm specifically talking about $nix/src/nix/develop.cc#L285-293:
auto shellDrvPath = writeDerivation(*evalStore, drv);
/* Build the derivation. */
store->buildPaths(
{ DerivedPath::Built {
.drvPath = makeConstantStorePathRef(shellDrvPath),
.outputs = OutputsSpec::All { },
}},
bmNormal, evalStore);
| 22:14:27 |
| 27 Dec 2024 |
|  Dimitar set a profile picture. | 11:41:14 |
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| 28 Dec 2024 |
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| 30 Dec 2024 |
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 Robert Hensing (roberth) | Leonardo Santiago: we don't have much of a C API for the Store yet, but more importantly nix develop is architecturally unsound and we should move most of that logic to Nixpkgs anyway because of the bad coupling. See https://github.com/NixOS/nix/issues/7501 | 13:19:13 |
| Robert Hensing (roberth) | So if you were to reimplement parts of develop with the C API, you'd end up duplicating those problems, and you won't support user-defined shell runners | 13:20:18 |
| Robert Hensing (roberth) | (We would welcome additions to the libstore C API; that's not a problem) | 13:21:40 |
| Leonardo Santiago | In reply to @roberthensing:matrix.org
So if you were to reimplement parts of develop with the C API, you'd end up duplicating those problems, and you won't support user-defined shell runners yes, I very much noticed that, and I'd love if the environment variable handling logic was done entirely in nix | 14:42:47 |
| Leonardo Santiago | the problem I'm trying to tackle is turning a derivation into a runnable shell. it seems to me that all that needs to be done is concatenating the buildInputs paths and running the shellHook as the --rcfile | 14:51:13 |
| Leonardo Santiago | but looking at the develop c++ code, there are a bunch of stuff going on, including creating another derivation to export env vars as json, running it, parsing from json, and so on | 14:52:50 |
| Leonardo Santiago | is there any simple way to replicate that behavior without having to mimic the c++ code? i don't really understand what constraints are at play here so for me it seems just overcomplicating for (seemingly) no reason, but I'm sure there's some motive behind all this | 14:54:27 |
| 31 Dec 2024 |
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| 1 Jan 2025 |
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| 2 Jan 2025 |
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| 8 Jan 2025 |
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| 10 Jan 2025 |
| Leonardo Santiago | what's the difference between nix_store_realise and nix_string_realise when the value is a derivation path? and is there a way to build multiple paths when the derivation itself can't be built? or do i need to just call nix_store_realise in a loop - this does not seem very efficient | 14:12:30 |
| Leonardo Santiago | * what's the difference between nix_store_realise and nix_string_realise when the value is a derivation path? and is there a way to build multiple (input source) paths when the derivation itself can't be built? or do i need to just call nix_store_realise in a loop - this does not seem very efficient | 14:12:43 |
| Leonardo Santiago | * what's the difference between nix_store_realise and nix_string_realise when the value is a derivation path? and is there a way to build multiple (input source) paths when the derivation itself can't be built? calling nix_store_realise in a loop does not seem very efficient | 14:13:05 |
|  @alex:afuchs.de left the room. | 15:02:44 |
| Leonardo Santiago | basically, is there any intent to add Store::buildPaths to the C API | 16:16:43 |
