mirror of
https://github.com/hanzoai/forge.git
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zeekayandHanzo Dev
aa87442fdd
Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
107 lines
2.2 KiB
Go
107 lines
2.2 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package git
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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)
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type ObjectID interface {
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String() string
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RefName() RefName
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IsZero() bool
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RawValue() []byte
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Type() ObjectFormat
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}
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type Sha1Hash [20]byte
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var _ ObjectID = (*Sha1Hash)(nil)
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func (h *Sha1Hash) String() string {
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return hex.EncodeToString(h[:])
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}
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func (h *Sha1Hash) RefName() RefName {
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return RefName(h.String())
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}
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func (h *Sha1Hash) IsZero() bool {
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empty := Sha1Hash{}
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return bytes.Equal(empty[:], h[:])
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}
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func (h *Sha1Hash) RawValue() []byte { return h[:] }
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func (*Sha1Hash) Type() ObjectFormat { return Sha1ObjectFormat }
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func MustIDFromString(hexHash string) ObjectID {
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id, err := NewIDFromString(hexHash)
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if err != nil {
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panic(err)
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}
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return id
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}
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type Sha256Hash [32]byte
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var _ ObjectID = (*Sha256Hash)(nil)
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func (h *Sha256Hash) String() string {
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return hex.EncodeToString(h[:])
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}
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func (h *Sha256Hash) RefName() RefName {
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return RefName(h.String())
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}
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func (h *Sha256Hash) IsZero() bool {
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empty := Sha256Hash{}
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return bytes.Equal(empty[:], h[:])
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}
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func (h *Sha256Hash) RawValue() []byte { return h[:] }
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func (*Sha256Hash) Type() ObjectFormat { return Sha256ObjectFormat }
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func NewIDFromString(hexHash string) (ObjectID, error) {
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var theObjectFormat ObjectFormat
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for _, objectFormat := range DefaultFeatures().SupportedObjectFormats {
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if len(hexHash) == objectFormat.FullLength() {
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theObjectFormat = objectFormat
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break
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}
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}
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if theObjectFormat == nil {
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return nil, fmt.Errorf("length %d has no matched object format: %s", len(hexHash), hexHash)
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}
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b, err := hex.DecodeString(hexHash)
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if err != nil {
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return nil, err
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}
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if len(b) != theObjectFormat.FullLength()/2 {
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return theObjectFormat.EmptyObjectID(), fmt.Errorf("length must be %d: %v", theObjectFormat.FullLength(), b)
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}
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return theObjectFormat.MustID(b), nil
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}
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func IsEmptyCommitID(commitID string) bool {
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if commitID == "" {
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return true
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}
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id, err := NewIDFromString(commitID)
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if err != nil {
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return false
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}
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return id.IsZero()
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}
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// ComputeBlobHash compute the hash for a given blob content
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func ComputeBlobHash(hashType ObjectFormat, content []byte) ObjectID {
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return hashType.ComputeHash(ObjectBlob, content)
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}
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