| 22 Sep 2024 |
 aos | What are the odds that we're both answering this question around the same time haha. Your answer is more thorough cafkafk thanks. I do want to add some links in case it's helpful: https://nix.dev/manual/nix/2.18/language/builtins.html?highlight=import#builtins-import and https://nixos.org/manual/nixos/stable/#sec-writing-modules | 09:33:19 |
 cafkafk | In reply to @aos1:matrix.org
What are the odds that we're both answering this question around the same time haha. Your answer is more thorough cafkafk thanks. I do want to add some links in case it's helpful: https://nix.dev/manual/nix/2.18/language/builtins.html?highlight=import#builtins-import and https://nixos.org/manual/nixos/stable/#sec-writing-modules Hehe, thanks :p | 09:33:35 |
| cafkafk | Also if you do wanna evaluate something like it's a NixOS module instead of using import, I'm pretty sure you can use lib.evalModules to get something like imports | 09:34:40 |
| cafkafk | ohh also, turns out import isn't technically a keyword, but a builtin 🙃
nix-repl> import = x: x + 1
nix-repl> import 10
11
| 09:37:02 |
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| 23 Sep 2024 |
 Kamilla 'ova | In reply to@cafkafk:gitter.im
ohh also, turns out import isn't technically a keyword, but a builtin 🙃
nix-repl> import = x: x + 1
nix-repl> import 10
11
null = "definitely not null" moment | 02:48:22 |
| cafkafk | I think it's a good argument for always using builtins.<thing> which I haven't managed to reassign (yet) | 02:50:10 |
| cafkafk | okay well you can reassign builtins but | 02:50:22 |
| cafkafk | * I think it's a good argument for always using builtins.<thing> which I haven't managed to reassign (yet) | 02:51:17 |
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| 24 Sep 2024 |
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 @memegames99:matrix.org | In reply to @cafkafk:gitter.im
ohh also, turns out import isn't technically a keyword, but a builtin 🙃
nix-repl> import = x: x + 1
nix-repl> import 10
11
very cool | 10:14:22 |
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| 25 Sep 2024 |
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 Artturin | arch = builtins.getAttr stdenvNoCC.hostPlatform.system {
x86_64-linux = "x64";
x86-linux = "x86";
};
vs
arch =
{
x86_64-linux = "x64";
x86-linux = "x86";
}
."${stdenvNoCC.hostPlatform.system}";
| 20:55:59 |
| Artturin | Any perf diff? | 20:56:31 |
 emily | hm, function call vs. string interpolation maybe? | 20:57:37 |
| Artturin | $ diff stats-simple-builtin.json stats-simple-interpolation.json
2c2
< "cpuTime": 0.011803999543190002,
---
> "cpuTime": 0.009681999683380127,
10c10
< "totalBytes": 10416
---
> "totalBytes": 10432
17,18c17,18
< "nrAvoided": 4,
< "nrExprs": 59,
---
> "nrAvoided": 3,
> "nrExprs": 58,
23,24c23,24
< "nrPrimOpCalls": 1,
< "nrThunks": 2,
---
> "nrPrimOpCalls": 0,
> "nrThunks": 1,
41,42c41,42
< "bytes": 3072,
< "number": 128
---
> "bytes": 3048,
> "number": 127
(ignore cpu time)
| 21:08:33 |
| Artturin | 
Download image.png | 21:09:53 |
| Artturin | let
system = "x86_64-linux";
arch =
{
x86_64-linux = "x64";
x86-linux = "x86";
}
."${system}";
in
arch
let
system = "x86_64-linux";
arch = builtins.getAttr system {
x86_64-linux = "x64";
x86-linux = "x86";
};
in
arch
| 21:11:43 |
| Artturin | And in nixpkgs | 21:13:35 |
