diff options
Diffstat (limited to 'tvix/nix-compat/src/nixhash')
| -rw-r--r-- | tvix/nix-compat/src/nixhash/ca_hash.rs | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/tvix/nix-compat/src/nixhash/ca_hash.rs b/tvix/nix-compat/src/nixhash/ca_hash.rs index 2bf5f966cefe..423531696afe 100644 --- a/tvix/nix-compat/src/nixhash/ca_hash.rs +++ b/tvix/nix-compat/src/nixhash/ca_hash.rs @@ -47,6 +47,26 @@ impl CAHash { } } + /// Returns a colon-separated string consisting of mode, recursiveness and + /// hash algo. Used as a prefix in various string representations. + pub fn algo_str(&self) -> &'static str { + match self.mode() { + HashMode::Flat => match self.hash().as_ref() { + NixHash::Md5(_) => "fixed:md5", + NixHash::Sha1(_) => "fixed:sha1", + NixHash::Sha256(_) => "fixed:sha256", + NixHash::Sha512(_) => "fixed:sha512", + }, + HashMode::Nar => match self.hash().as_ref() { + NixHash::Md5(_) => "fixed:r:md5", + NixHash::Sha1(_) => "fixed:r:sha1", + NixHash::Sha256(_) => "fixed:r:sha256", + NixHash::Sha512(_) => "fixed:r:sha512", + }, + HashMode::Text => "text:sha256", + } + } + /// Constructs a [CAHash] from the textual representation, /// which is one of the three: /// - `text:sha256:$nixbase32sha256digest` @@ -76,13 +96,11 @@ impl CAHash { /// Formats a [CAHash] in the Nix default hash format, which is the format /// that's used in NARInfos for example. pub fn to_nix_nixbase32_string(&self) -> String { - match self { - CAHash::Flat(nh) => format!("fixed:{}", nh.to_nix_nixbase32_string()), - CAHash::Nar(nh) => format!("fixed:r:{}", nh.to_nix_nixbase32_string()), - CAHash::Text(digest) => { - format!("text:sha256:{}", nixbase32::encode(digest)) - } - } + format!( + "{}:{}", + self.algo_str(), + nixbase32::encode(self.hash().digest_as_bytes()) + ) } /// This takes a serde_json::Map and turns it into this structure. This is necessary to do such |