forked from mirror/gitea
4eb2a29910
The 4 functions are duplicated, especially as interface methods. I think we just need to keep `MustID` the only one and remove other 3. ``` MustID(b []byte) ObjectID MustIDFromString(s string) ObjectID NewID(b []byte) (ObjectID, error) NewIDFromString(s string) (ObjectID, error) ``` Introduced the new interfrace method `ComputeHash` which will replace the interface `HasherInterface`. Now we don't need to keep two interfaces. Reintroduced `git.NewIDFromString` and `git.MustIDFromString`. The new function will detect the hash length to decide which objectformat of it. If it's 40, then it's SHA1. If it's 64, then it's SHA256. This will be right if the commitID is a full one. So the parameter should be always a full commit id. @AdamMajer Please review.
91 lines
1.8 KiB
Go
91 lines
1.8 KiB
Go
// Copyright 2023 The Gitea Authors. 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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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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func (h *Sha1Hash) String() string {
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return hex.EncodeToString(h[:])
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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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var _ ObjectID = &Sha1Hash{}
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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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func NewIDFromString(hexHash string) (ObjectID, error) {
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var theObjectFormat ObjectFormat
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for _, objectFormat := range 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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type ErrInvalidSHA struct {
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SHA string
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}
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func (err ErrInvalidSHA) Error() string {
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return fmt.Sprintf("invalid sha: %s", err.SHA)
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}
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