refactor(tvix/nix-compat): move HashAlgo to separate file

… and keep the pub exports as is.

Change-Id: I2ad21660577553395f05b5ba71083626429b0dfc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8363
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>

tvix/nix-compat/src/lib.rs

@@ -4,6 +4,7 @@ pub mod derivation;
 pub mod nar;
 pub mod nixbase32;
 pub mod nixhash;
+mod nixhash_algos;
 mod nixhash_with_mode;
 pub mod store_path;
 

tvix/nix-compat/src/nixhash.rs

@@ -1,10 +1,8 @@
+use crate::nixbase32;
 use data_encoding::{BASE64, BASE64_NOPAD, HEXLOWER};
-use serde::{Deserialize, Serialize};
-use std::fmt::Display;
 use thiserror::Error;
 
-use crate::nixbase32;
+pub use crate::nixhash_algos::HashAlgo;
-
 pub use crate::nixhash_with_mode::NixHashWithMode;
 
 /// Nix allows specifying hashes in various encodings, and magically just
@@ -29,40 +27,6 @@ impl NixHash {
     }
 }
 
-/// This are the hash algorithms supported by cppnix.
-#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
-pub enum HashAlgo {
-    Md5,
-    Sha1,
-    Sha256,
-    Sha512,
-}
-
-impl Display for HashAlgo {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match &self {
-            HashAlgo::Md5 => write!(f, "md5"),
-            HashAlgo::Sha1 => write!(f, "sha1"),
-            HashAlgo::Sha256 => write!(f, "sha256"),
-            HashAlgo::Sha512 => write!(f, "sha512"),
-        }
-    }
-}
-
-impl TryFrom<&str> for HashAlgo {
-    type Error = Error;
-
-    fn try_from(algo_str: &str) -> Result<Self, Self::Error> {
-        match algo_str {
-            "md5" => Ok(Self::Md5),
-            "sha1" => Ok(Self::Sha1),
-            "sha256" => Ok(Self::Sha256),
-            "sha512" => Ok(Self::Sha512),
-            _ => Err(Error::InvalidAlgo(algo_str.to_string())),
-        }
-    }
-}
-
 /// Errors related to NixHash construction.
 #[derive(Debug, Error)]
 pub enum Error {

tvix/nix-compat/src/nixhash_algos.rs

@@ -0,0 +1,39 @@
+use std::fmt::Display;
+
+use serde::{Deserialize, Serialize};
+
+use crate::nixhash::Error;
+
+/// This are the hash algorithms supported by cppnix.
+#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
+pub enum HashAlgo {
+    Md5,
+    Sha1,
+    Sha256,
+    Sha512,
+}
+
+impl Display for HashAlgo {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match &self {
+            HashAlgo::Md5 => write!(f, "md5"),
+            HashAlgo::Sha1 => write!(f, "sha1"),
+            HashAlgo::Sha256 => write!(f, "sha256"),
+            HashAlgo::Sha512 => write!(f, "sha512"),
+        }
+    }
+}
+
+impl TryFrom<&str> for HashAlgo {
+    type Error = Error;
+
+    fn try_from(algo_str: &str) -> Result<Self, Self::Error> {
+        match algo_str {
+            "md5" => Ok(Self::Md5),
+            "sha1" => Ok(Self::Sha1),
+            "sha256" => Ok(Self::Sha256),
+            "sha512" => Ok(Self::Sha512),
+            _ => Err(Error::InvalidAlgo(algo_str.to_string())),
+        }
+    }
+}