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feat(tvix/glue): context-aware toFile

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This removes the reference tracking and uses instead the context for
references and returns some.

Change-Id: Ic359ca6b903b63f1a9c679c566004c617b792442
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10435
Autosubmit: raitobezarius <tvl@lahfa.xyz>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
This commit is contained in:
Ryan Lahfa 2023-12-26 01:30:05 +01:00 committed by clbot
parent cc098b9aaa
commit 20c894e232
2 changed files with 23 additions and 21 deletions
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9
tvix/eval/src/errors.rs
View file

@ -202,6 +202,9 @@ pub enum ErrorKind {
context: String,
underlying: Box<ErrorKind>,
},
/// Unexpected context string
UnexpectedContext,
}
impl error::Error for Error {
@ -484,6 +487,10 @@ to a missing value in the attribute set(s) included via `with`."#,
ErrorKind::WithContext { .. } => {
panic!("internal ErrorKind::WithContext variant leaked")
}
ErrorKind::UnexpectedContext => {
write!(f, "unexpected context string")
}
}
}
}
@ -736,6 +743,7 @@ impl Error {
ErrorKind::InvalidAttributeName(_) => "in this attribute set",
ErrorKind::RelativePathResolution(_) => "in this path literal",
ErrorKind::UnexpectedArgument { .. } => "in this function call",
ErrorKind::UnexpectedContext => "in this string",
// The spans for some errors don't have any more descriptive stuff
// in them, or we don't utilise it yet.
@ -810,6 +818,7 @@ impl Error {
ErrorKind::Xml(_) => "E034",
ErrorKind::FromTomlError(_) => "E035",
ErrorKind::NotSerialisableToJson(_) => "E036",
ErrorKind::UnexpectedContext => "E037",
// Special error code for errors from other Tvix
// components. We may want to introduce a code namespacing

27
tvix/glue/src/builtins/derivation.rs
View file

@ -464,27 +464,20 @@ pub(crate) mod derivation_builtins {
.to_str()
.context("evaluating the `name` parameter of builtins.toFile")?;
let content = content
.to_str()
.to_contextful_str()
.context("evaluating the `content` parameter of builtins.toFile")?;
let mut refscan = state.borrow().reference_scanner();
refscan.scan(content.as_str());
let refs = {
let paths = state.borrow();
refscan
.finalise()
.into_iter()
.map(|path| paths[&path].path.to_string())
.collect::<Vec<_>>()
};
if content.iter_derivation().count() > 0 || content.iter_single_outputs().count() > 0 {
return Err(ErrorKind::UnexpectedContext);
}
// TODO: fail on derivation references (only "plain" is allowed here)
let path = nix_compat::store_path::build_text_path(name.as_str(), content.as_str(), refs)
.map_err(|_e| {
nix_compat::derivation::DerivationError::InvalidOutputName(
name.as_str().to_string(),
let path = nix_compat::store_path::build_text_path(
name.as_str(),
content.as_str(),
content.iter_plain(),
)
.map_err(|_e| {
nix_compat::derivation::DerivationError::InvalidOutputName(name.as_str().to_string())
})
.map_err(DerivationError::InvalidDerivation)?
.to_absolute_path();