c3fb6d2218
This adds Size() and Digest() functions for the golang version. Change-Id: If71445a9bb26100bb4076ac4f5c96945b33919f9 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7325 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
39 lines
796 B
Go
39 lines
796 B
Go
package storev1
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import (
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"fmt"
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"google.golang.org/protobuf/proto"
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"lukechampine.com/blake3"
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)
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// The size of a directory is calculated by summing up the numbers of
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// `directories`, `files` and `symlinks`, and for each directory, its size
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// field.
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func (d *Directory) Size() uint32 {
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var size uint32
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size = uint32(len(d.Files) + len(d.Symlinks))
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for _, d := range d.Directories {
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size += 1 + d.Size
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}
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return size
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}
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func (d *Directory) Digest() ([]byte, error) {
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b, err := proto.MarshalOptions{
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Deterministic: true,
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}.Marshal(d)
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if err != nil {
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return nil, fmt.Errorf("error while marshalling directory: %w", err)
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}
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h := blake3.New(32, nil)
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_, err = h.Write(b)
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if err != nil {
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return nil, fmt.Errorf("error writing to hasher: %w", err)
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}
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return h.Sum(nil), nil
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}
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