forgejo/modules/git/blob_nogogit.go
6543 87009ab40a
Reduce data races (#14549)
* Add race conditions into test

* Fix Race in GetManager()

* DataAsync() use error chan

* just log no chan

* finish
2021-02-03 22:36:38 +01:00

79 lines
1.8 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// +build !gogit
package git
import (
"bufio"
"io"
"strconv"
"strings"
gitea_log "code.gitea.io/gitea/modules/log"
)
// Blob represents a Git object.
type Blob struct {
ID SHA1
gotSize bool
size int64
repoPath string
name string
}
// DataAsync gets a ReadCloser for the contents of a blob without reading it all.
// Calling the Close function on the result will discard all unread output.
func (b *Blob) DataAsync() (io.ReadCloser, error) {
stdoutReader, stdoutWriter := io.Pipe()
go func() {
stderr := &strings.Builder{}
err := NewCommand("cat-file", "--batch").RunInDirFullPipeline(b.repoPath, stdoutWriter, stderr, strings.NewReader(b.ID.String()+"\n"))
if err != nil {
err = ConcatenateError(err, stderr.String())
gitea_log.Error("Blob.DataAsync Error: %v", err)
_ = stdoutWriter.CloseWithError(err)
} else {
_ = stdoutWriter.Close()
}
}()
bufReader := bufio.NewReader(stdoutReader)
_, _, size, err := ReadBatchLine(bufReader)
if err != nil {
stdoutReader.Close()
return nil, err
}
return &LimitedReaderCloser{
R: bufReader,
C: stdoutReader,
N: size,
}, nil
}
// Size returns the uncompressed size of the blob
func (b *Blob) Size() int64 {
if b.gotSize {
return b.size
}
size, err := NewCommand("cat-file", "-s", b.ID.String()).RunInDir(b.repoPath)
if err != nil {
log("error whilst reading size for %s in %s. Error: %v", b.ID.String(), b.repoPath, err)
return 0
}
b.size, err = strconv.ParseInt(size[:len(size)-1], 10, 64)
if err != nil {
log("error whilst parsing size %s for %s in %s. Error: %v", size, b.ID.String(), b.repoPath, err)
return 0
}
b.gotSize = true
return b.size
}