feat(tvix/eval): implement `builtins.hashString` r/7597

Implements md5, sha1, sha256 and sha512 using the related crates from
the RustCrypto hashes project (https://github.com/RustCrypto/hashes)

Change-Id: I00730dea44ec9ef85309edc27addab0ae88814b8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11005
Tested-by: BuildkiteCI
Reviewed-by: aspen <root@gws.fyi>

1 files changed, 6 insertions, 0 deletions

diff --git a/tvix/eval/src/value/string.rs b/tvix/eval/src/value/string.rs
index 2f1592546b..6ce0d190c0 100644
--- a/tvix/eval/src/value/string.rs
+++ b/tvix/eval/src/value/string.rs
@@ -524,6 +524,12 @@ impl<'a> From<&'a NixString> for &'a BStr {
     }
 }
 
+impl From<NixString> for String {
+    fn from(s: NixString) -> Self {
+        s.to_string()
+    }
+}
+
 impl From<NixString> for BString {
     fn from(s: NixString) -> Self {
         s.as_bstr().to_owned()