tvl-depot/tvix/nar-bridge-go/pkg/http/util.go
Florian Klink 1392913e98 chore(tvix/nar-bridge): move to nar-bridge-go
Make some space for the rust implementation.

Change-Id: I924dc1657be10abe5a11951c3b9de50bae06db19
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11662
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: yuka <yuka@yuka.dev>
2024-05-15 21:31:36 +00:00

24 lines
700 B
Go

package http
import (
"fmt"
nixhash "github.com/nix-community/go-nix/pkg/hash"
)
// parseNarHashFromUrl parses a nixbase32 string representing a sha256 NarHash
// and returns a nixhash.Hash when it was able to parse, or an error.
func parseNarHashFromUrl(narHashFromUrl string) (*nixhash.Hash, error) {
// peek at the length. If it's 52 characters, assume sha256,
// if it's something else, this is an error.
l := len(narHashFromUrl)
if l != 52 {
return nil, fmt.Errorf("invalid length of narHash: %v", l)
}
nixHash, err := nixhash.ParseNixBase32("sha256:" + narHashFromUrl)
if err != nil {
return nil, fmt.Errorf("unable to parse nixbase32 hash: %w", err)
}
return nixHash, nil
}