diff options
Diffstat (limited to 'tvix/nix-compat/src/store_path/utils.rs')
| -rw-r--r-- | tvix/nix-compat/src/store_path/utils.rs | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/tvix/nix-compat/src/store_path/utils.rs b/tvix/nix-compat/src/store_path/utils.rs index 0b75ef50647c..2289594e3a10 100644 --- a/tvix/nix-compat/src/store_path/utils.rs +++ b/tvix/nix-compat/src/store_path/utils.rs @@ -62,10 +62,8 @@ pub fn build_ca_path<'a, S: AsRef<str>, I: IntoIterator<Item = S>>( self_reference: bool, ) -> Result<StorePathRef<'a>, BuildStorePathError> { // self references are only allowed for CAHash::Nar(NixHash::Sha256(_)). - if self_reference { - let CAHash::Nar(NixHash::Sha256(_)) = ca_hash else { - return Err(BuildStorePathError::InvalidReference()); - }; + if self_reference && matches!(ca_hash, CAHash::Nar(NixHash::Sha256(_))) { + return Err(BuildStorePathError::InvalidReference()); } let (ty, hash) = match &ca_hash { @@ -86,11 +84,7 @@ pub fn build_ca_path<'a, S: AsRef<str>, I: IntoIterator<Item = S>>( ( "output:out".to_string(), - NixHash::Sha256( - Sha256::new_with_prefix(format!("fixed:out:r:{}:", hash.to_nix_hex_string())) - .finalize() - .into(), - ), + NixHash::Sha256(fixed_out_digest("fixed:out:r", hash)), ) } // CaHash::Flat is using something very similar, except the `r:` prefix. @@ -101,11 +95,7 @@ pub fn build_ca_path<'a, S: AsRef<str>, I: IntoIterator<Item = S>>( ( "output:out".to_string(), - NixHash::Sha256( - Sha256::new_with_prefix(format!("fixed:out:{}:", hash.to_nix_hex_string())) - .finalize() - .into(), - ), + NixHash::Sha256(fixed_out_digest("fixed:out", hash)), ) } }; @@ -114,6 +104,14 @@ pub fn build_ca_path<'a, S: AsRef<str>, I: IntoIterator<Item = S>>( .map_err(BuildStorePathError::InvalidStorePath) } +/// Helper function, used in [build_ca_path] for the non-sha256 [CAHash::Nar] +/// and [CAHash::Flat]. +fn fixed_out_digest(prefix: &str, hash: &NixHash) -> [u8; 32] { + Sha256::new_with_prefix(format!("{}:{}:", prefix, hash.to_nix_hex_string())) + .finalize() + .into() +} + /// For given NAR sha256 digest and name, return the new [StorePathRef] this /// would have, or an error, in case the name is invalid. pub fn build_nar_based_store_path<'a>( |