diff options
| -rw-r--r-- | tvix/eval/src/builtins/mod.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tvix/eval/src/builtins/mod.rs b/tvix/eval/src/builtins/mod.rs index 05c5eceeffda..a3aaf33bf4af 100644 --- a/tvix/eval/src/builtins/mod.rs +++ b/tvix/eval/src/builtins/mod.rs @@ -381,6 +381,31 @@ fn pure_builtins() -> Vec<Builtin> { Ok(Value::attrs(NixAttrs::from_map(res))) }, ), + Builtin::new("parseDrvName", &[true], |args: Vec<Value>, vm: &mut VM| { + // This replicates cppnix's (mis?)handling of codepoints + // above U+007f following 0x2d ('-') + let s = args[0].coerce_to_string(CoercionKind::Weak, vm)?; + let slice: &[u8] = s.as_str().as_ref(); + let (name, dash_and_version) = slice.split_at( + slice + .windows(2) + .enumerate() + .find_map(|x| match x { + (idx, [b'-', c1]) if !c1.is_ascii_alphabetic() => Some(idx), + _ => None, + }) + .unwrap_or(slice.len()), + ); + let version = dash_and_version + .split_first() + .map(|x| core::str::from_utf8(x.1)) + .unwrap_or(Ok(""))? + .into(); + Ok(Value::attrs(NixAttrs::from_map(BTreeMap::from([ + (NixString::NAME, core::str::from_utf8(name)?.into()), + ("version".into(), version), + ])))) + }), Builtin::new("splitVersion", &[true], |args: Vec<Value>, _: &mut VM| { let s = args[0].to_str()?; let s = VersionPartsIter::new(s.as_str()); |