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use bstr::ByteSlice;
use tvix_eval::{
generators::{self, GenCo},
CatchableErrorKind, CoercionKind, ErrorKind, NixAttrs, NixString, Value,
};
pub(super) async fn strong_importing_coerce_to_string(
co: &GenCo,
val: Value,
) -> Result<NixString, CatchableErrorKind> {
let val = generators::request_force(co, val).await;
generators::request_string_coerce(
co,
val,
CoercionKind {
strong: true,
import_paths: true,
},
)
.await
}
pub(super) async fn select_string(
co: &GenCo,
attrs: &NixAttrs,
key: &str,
) -> Result<Result<Option<String>, CatchableErrorKind>, ErrorKind> {
if let Some(attr) = attrs.select(key) {
match strong_importing_coerce_to_string(co, attr.clone()).await {
Err(cek) => return Ok(Err(cek)),
Ok(str) => return Ok(Ok(Some(str.to_str()?.to_owned()))),
}
}
Ok(Ok(None))
}
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