cbf923e87b
Refactor Hash interfaces and centralize hash function. This will allow easier introduction of different hash function later on. This forms the "no-op" part of the SHA256 enablement patch.
101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Copyright 2019 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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"io"
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"strings"
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)
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// ObjectType git object type
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type ObjectType string
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const (
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// ObjectCommit commit object type
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ObjectCommit ObjectType = "commit"
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// ObjectTree tree object type
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ObjectTree ObjectType = "tree"
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// ObjectBlob blob object type
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ObjectBlob ObjectType = "blob"
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// ObjectTag tag object type
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ObjectTag ObjectType = "tag"
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// ObjectBranch branch object type
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ObjectBranch ObjectType = "branch"
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)
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// Bytes returns the byte array for the Object Type
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func (o ObjectType) Bytes() []byte {
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return []byte(o)
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}
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type EmptyReader struct{}
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func (EmptyReader) Read(p []byte) (int, error) {
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return 0, io.EOF
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}
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func (repo *Repository) GetObjectFormat() (ObjectFormat, error) {
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if repo != nil && repo.objectFormat != nil {
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return repo.objectFormat, nil
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}
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str, err := repo.hashObject(EmptyReader{}, false)
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if err != nil {
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return nil, err
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}
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hash, err := IDFromString(str)
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if err != nil {
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return nil, err
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}
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repo.objectFormat = hash.Type()
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return repo.objectFormat, nil
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}
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// HashObject takes a reader and returns hash for that reader
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func (repo *Repository) HashObject(reader io.Reader) (ObjectID, error) {
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idStr, err := repo.hashObject(reader, true)
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if err != nil {
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return nil, err
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}
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return repo.objectFormat.NewIDFromString(idStr)
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}
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func (repo *Repository) hashObject(reader io.Reader, save bool) (string, error) {
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var cmd *Command
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if save {
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cmd = NewCommand(repo.Ctx, "hash-object", "-w", "--stdin")
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} else {
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cmd = NewCommand(repo.Ctx, "hash-object", "--stdin")
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}
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stdout := new(bytes.Buffer)
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stderr := new(bytes.Buffer)
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err := cmd.Run(&RunOpts{
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Dir: repo.Path,
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Stdin: reader,
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Stdout: stdout,
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Stderr: stderr,
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})
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if err != nil {
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return "", err
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}
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return strings.TrimSpace(stdout.String()), nil
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}
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// GetRefType gets the type of the ref based on the string
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func (repo *Repository) GetRefType(ref string) ObjectType {
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if repo.IsTagExist(ref) {
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return ObjectTag
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} else if repo.IsBranchExist(ref) {
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return ObjectBranch
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} else if repo.IsCommitExist(ref) {
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return ObjectCommit
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} else if _, err := repo.GetBlob(ref); err == nil {
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return ObjectBlob
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}
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return ObjectType("invalid")
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}
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