feat(tvix/eval): Implement builtins.removeAttrs

Change-Id: I28910991a0108436a42ac7bf3458f9180a44154e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6928
Reviewed-by: Adam Joseph <adam@westernsemico.com>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
This commit is contained in:
Griffin Smith 2022-10-10 14:48:05 -04:00 committed by grfn
parent 562c50fadd
commit 4283f0139a
4 changed files with 31 additions and 1 deletions

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@ -4,7 +4,7 @@
//! available builtins in Nix.
use std::cmp;
use std::collections::{BTreeMap, HashMap};
use std::collections::{BTreeMap, HashMap, HashSet};
use std::path::PathBuf;
use crate::{
@ -362,6 +362,25 @@ fn pure_builtins() -> Vec<Builtin> {
&[false, false],
|args: Vec<Value>, vm: &mut VM| arithmetic_op!(&*args[0].force(vm)?, &*args[1].force(vm)?, *),
),
Builtin::new(
"removeAttrs",
&[true, true],
|args: Vec<Value>, _: &mut VM| {
let attrs = args[0].to_attrs()?;
let keys = args[1]
.to_list()?
.into_iter()
.map(|v| v.to_str())
.collect::<Result<HashSet<_>, _>>()?;
let mut res = BTreeMap::new();
for (k, v) in attrs.iter() {
if !keys.contains(k) {
res.insert(k.clone(), v.clone());
}
}
Ok(Value::attrs(NixAttrs::from_map(res)))
},
),
Builtin::new("splitVersion", &[true], |args: Vec<Value>, _: &mut VM| {
let s = args[0].to_str()?;
let s = VersionPartsIter::new(s.as_str());

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@ -0,0 +1,5 @@
let {
attrs = {x = 123; y = 456;};
body = (removeAttrs attrs ["x"]).x;
}

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@ -0,0 +1 @@
456

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@ -0,0 +1,5 @@
let {
attrs = {x = 123; y = 456;};
body = (removeAttrs attrs ["x"]).y;
}