600815c168
This is very similar to the Rust counterpart. Change-Id: I40d51aaac3fcf7f52e5896587e561bc2377f6269 Reviewed-on: https://cl.tvl.fyi/c/depot/+/9549 Reviewed-by: tazjin <tazjin@tvl.su> Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
93 lines
3 KiB
Go
93 lines
3 KiB
Go
package storev1
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/base64"
|
|
"fmt"
|
|
|
|
"github.com/nix-community/go-nix/pkg/storepath"
|
|
)
|
|
|
|
// Validate performs some checks on the PathInfo struct, returning either the
|
|
// StorePath of the root node, or an error.
|
|
func (p *PathInfo) Validate() (*storepath.StorePath, error) {
|
|
// ensure References has the right number of bytes.
|
|
for i, reference := range p.GetReferences() {
|
|
if len(reference) != storepath.PathHashSize {
|
|
return nil, fmt.Errorf("invalid length of digest at position %d, expected %d, got %d", i, storepath.PathHashSize, len(reference))
|
|
}
|
|
}
|
|
|
|
// If there's a Narinfo field populated..
|
|
if narInfo := p.GetNarinfo(); narInfo != nil {
|
|
// ensure the number of references matches len(References).
|
|
if len(narInfo.GetReferenceNames()) != len(p.GetReferences()) {
|
|
return nil, fmt.Errorf("inconsistent number of references: %d (references) vs %d (narinfo)", len(narInfo.GetReferenceNames()), len(p.GetReferences()))
|
|
}
|
|
|
|
// for each ReferenceName…
|
|
for i, referenceName := range narInfo.GetReferenceNames() {
|
|
// ensure it parses to a store path
|
|
storePath, err := storepath.FromString(referenceName)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid ReferenceName at position %d: %w", i, err)
|
|
}
|
|
|
|
// ensure the digest matches the one at References[i]
|
|
if !bytes.Equal(p.GetReferences()[i], storePath.Digest) {
|
|
return nil, fmt.Errorf(
|
|
"digest in ReferenceName at position %d does not match digest in PathInfo, expected %s, got %s",
|
|
i,
|
|
base64.StdEncoding.EncodeToString(p.GetReferences()[i]),
|
|
base64.StdEncoding.EncodeToString(storePath.Digest),
|
|
)
|
|
}
|
|
}
|
|
}
|
|
|
|
// ensure there is a (root) node present
|
|
rootNode := p.GetNode()
|
|
if rootNode == nil {
|
|
return nil, fmt.Errorf("root node must be set")
|
|
}
|
|
|
|
// ensure it properly parses to a store path, and in case it refers to a digest, ensure it has the right length.
|
|
if node := rootNode.GetDirectory(); node != nil {
|
|
if len(node.Digest) != 32 {
|
|
return nil, fmt.Errorf("invalid digest size for %s, expected %d, got %d", node.Name, 32, len(node.Digest))
|
|
}
|
|
|
|
storePath, err := storepath.FromString(string(node.GetName()))
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unable to parse %s as StorePath: %w", node.Name, err)
|
|
}
|
|
|
|
return storePath, nil
|
|
|
|
} else if node := rootNode.GetFile(); node != nil {
|
|
if len(node.Digest) != 32 {
|
|
return nil, fmt.Errorf("invalid digest size for %s, expected %d, got %d", node.Name, 32, len(node.Digest))
|
|
}
|
|
|
|
storePath, err := storepath.FromString(string(node.GetName()))
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unable to parse %s as StorePath: %w", node.Name, err)
|
|
}
|
|
|
|
return storePath, nil
|
|
|
|
} else if node := rootNode.GetSymlink(); node != nil {
|
|
storePath, err := storepath.FromString(string(node.GetName()))
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unable to parse %s as StorePath: %w", node.Name, err)
|
|
}
|
|
|
|
return storePath, nil
|
|
|
|
} else {
|
|
// this would only happen if we introduced a new type
|
|
panic("unreachable")
|
|
}
|
|
}
|