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//! Contains errors that can occur during evaluation of builtins in this crate
use nix_compat::{
nixhash::{self, NixHash},
store_path::BuildStorePathError,
};
use std::rc::Rc;
use thiserror::Error;
/// Errors related to derivation construction
#[derive(Debug, Error)]
pub enum DerivationError {
#[error("an output with the name '{0}' is already defined")]
DuplicateOutput(String),
#[error("fixed-output derivations can only have the default `out`-output")]
ConflictingOutputTypes,
#[error("the environment variable '{0}' has already been set in this derivation")]
DuplicateEnvVar(String),
#[error("invalid derivation parameters: {0}")]
InvalidDerivation(#[from] nix_compat::derivation::DerivationError),
#[error("invalid output hash: {0}")]
InvalidOutputHash(#[from] nixhash::Error),
#[error("invalid output hash mode: '{0}', only 'recursive' and 'flat` are supported")]
InvalidOutputHashMode(String),
}
impl From<DerivationError> for tvix_eval::ErrorKind {
fn from(err: DerivationError) -> Self {
tvix_eval::ErrorKind::TvixError(Rc::new(err))
}
}
#[derive(Debug, Error)]
pub enum FetcherError {
#[error("hash mismatch in file downloaded from {url}:\n wanted: {wanted}\n got: {got}")]
HashMismatch {
url: String,
wanted: NixHash,
got: NixHash,
},
#[error("Invalid hash type '{0}' for fetcher")]
InvalidHashType(&'static str),
#[error("Error in store path for fetcher output: {0}")]
StorePath(#[from] BuildStorePathError),
#[error(transparent)]
Http(#[from] reqwest::Error),
}
impl From<FetcherError> for tvix_eval::ErrorKind {
fn from(err: FetcherError) -> Self {
tvix_eval::ErrorKind::TvixError(Rc::new(err))
}
}
/// Errors related to `builtins.path` and `builtins.filterSource`,
/// a.k.a. "importing" builtins.
#[derive(Debug, Error)]
pub enum ImportError {
#[error("non-file '{0}' cannot be imported in 'flat' mode")]
FlatImportOfNonFile(String),
#[error("hash mismatch at ingestion of '{0}', expected: '{1}', got: '{2}'")]
HashMismatch(String, NixHash, NixHash),
}
impl From<ImportError> for tvix_eval::ErrorKind {
fn from(err: ImportError) -> Self {
tvix_eval::ErrorKind::TvixError(Rc::new(err))
}
}
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