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author | Griffin Smith <root@gws.fyi> | 2022-10-08T18·17-0400 |
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committer | grfn <grfn@gws.fyi> | 2022-10-09T22·18+0000 |
commit | afdf1e0ed02ec6e12a264dcfed18e4ce3028cf2b (patch) | |
tree | 8064041b4dff0588ade37a57be370665b00e223c /tvix/eval/src/builtins/mod.rs | |
parent | d0f571dcc02c59c090cdca8779ca8835f091fd26 (diff) |
feat(tvix/eval): Implement builtins.listToAttrs r/5073
Implement the listToAttrs builtin, which constructs an attribute set from a list of attribute sets with keys name and value. This is tested using an adaptation of the nix `eval-ok-listtoattrs.nix`, with the utilities from `lib.nix` inlined. Change-Id: Ib5bf743466dda9722c2c1e00797df4b58448cf0f Reviewed-on: https://cl.tvl.fyi/c/depot/+/6894 Autosubmit: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
Diffstat (limited to 'tvix/eval/src/builtins/mod.rs')
-rw-r--r-- | tvix/eval/src/builtins/mod.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tvix/eval/src/builtins/mod.rs b/tvix/eval/src/builtins/mod.rs index eeb784ce4468..b859e2844ee8 100644 --- a/tvix/eval/src/builtins/mod.rs +++ b/tvix/eval/src/builtins/mod.rs @@ -294,6 +294,23 @@ fn pure_builtins() -> Vec<Builtin> { let value = args[0].force(vm)?; Ok(Value::Bool(matches!(*value, Value::String(_)))) }), + Builtin::new("listToAttrs", &[true], |args: Vec<Value>, vm: &mut VM| { + let list = args[0].to_list()?; + let mut map = BTreeMap::new(); + for val in list { + let attrs = val.force(vm)?.to_attrs()?; + let get = |key| { + attrs + .select(key) + .ok_or(ErrorKind::AttributeNotFound { name: key.into() }) + }; + let name = get("name")?.to_str()?; + let value = get("value")?.clone(); + // Map entries earlier in the list take precedence over entries later in the list + map.entry(name).or_insert(value); + } + Ok(Value::attrs(NixAttrs::from_map(map))) + }), Builtin::new( "mul", &[false, false], |