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// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"bytes"
"io"
"strings"
)
// ObjectType git object type
type ObjectType string
const (
// ObjectCommit commit object type
ObjectCommit ObjectType = "commit"
// ObjectTree tree object type
ObjectTree ObjectType = "tree"
// ObjectBlob blob object type
ObjectBlob ObjectType = "blob"
// ObjectTag tag object type
ObjectTag ObjectType = "tag"
// ObjectBranch branch object type
ObjectBranch ObjectType = "branch"
)
// Bytes returns the byte array for the Object Type
func (o ObjectType) Bytes() []byte {
return []byte(o)
}
type EmptyReader struct{}
func (EmptyReader) Read(p []byte) (int, error) {
return 0, io.EOF
}
func (repo *Repository) GetObjectFormat() (ObjectFormat, error) {
if repo != nil && repo.objectFormat != nil {
return repo.objectFormat, nil
}
str, err := repo.hashObject(EmptyReader{}, false)
if err != nil {
return nil, err
}
hash, err := NewIDFromString(str)
if err != nil {
return nil, err
}
repo.objectFormat = hash.Type()
return repo.objectFormat, nil
}
// HashObject takes a reader and returns hash for that reader
func (repo *Repository) HashObject(reader io.Reader) (ObjectID, error) {
idStr, err := repo.hashObject(reader, true)
if err != nil {
return nil, err
}
return NewIDFromString(idStr)
}
func (repo *Repository) hashObject(reader io.Reader, save bool) (string, error) {
var cmd *Command
if save {
cmd = NewCommand(repo.Ctx, "hash-object", "-w", "--stdin")
} else {
cmd = NewCommand(repo.Ctx, "hash-object", "--stdin")
}
stdout := new(bytes.Buffer)
stderr := new(bytes.Buffer)
err := cmd.Run(&RunOpts{
Dir: repo.Path,
Stdin: reader,
Stdout: stdout,
Stderr: stderr,
})
if err != nil {
return "", err
}
return strings.TrimSpace(stdout.String()), nil
}
// GetRefType gets the type of the ref based on the string
func (repo *Repository) GetRefType(ref string) ObjectType {
if repo.IsTagExist(ref) {
return ObjectTag
} else if repo.IsBranchExist(ref) {
return ObjectBranch
} else if repo.IsCommitExist(ref) {
return ObjectCommit
} else if _, err := repo.GetBlob(ref); err == nil {
return ObjectBlob
}
return ObjectType("invalid")
}
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