270aab429e
Use common git cat-file --batch and git cat-file --batch-check to
significantly reduce calls to git.
Signed-off-by: Andrew Thornton <art27@cantab.net>
128 lines
3.1 KiB
Go
128 lines
3.1 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
|
|
// Copyright 2018 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"
|
|
"strings"
|
|
)
|
|
|
|
// IsReferenceExist returns true if given reference exists in the repository.
|
|
func (repo *Repository) IsReferenceExist(name string) bool {
|
|
if name == "" {
|
|
return false
|
|
}
|
|
|
|
wr, rd, cancel := repo.CatFileBatchCheck()
|
|
defer cancel()
|
|
_, err := wr.Write([]byte(name + "\n"))
|
|
if err != nil {
|
|
log("Error writing to CatFileBatchCheck %v", err)
|
|
return false
|
|
}
|
|
_, _, _, err = ReadBatchLine(rd)
|
|
return err == nil
|
|
}
|
|
|
|
// IsBranchExist returns true if given branch exists in current repository.
|
|
func (repo *Repository) IsBranchExist(name string) bool {
|
|
if name == "" {
|
|
return false
|
|
}
|
|
|
|
return repo.IsReferenceExist(BranchPrefix + name)
|
|
}
|
|
|
|
// GetBranches returns branches from the repository, skipping skip initial branches and
|
|
// returning at most limit branches, or all branches if limit is 0.
|
|
func (repo *Repository) GetBranches(skip, limit int) ([]string, int, error) {
|
|
return callShowRef(repo.Path, BranchPrefix, "--heads", skip, limit)
|
|
}
|
|
|
|
// callShowRef return refs, if limit = 0 it will not limit
|
|
func callShowRef(repoPath, prefix, arg string, skip, limit int) (branchNames []string, countAll int, err error) {
|
|
stdoutReader, stdoutWriter := io.Pipe()
|
|
defer func() {
|
|
_ = stdoutReader.Close()
|
|
_ = stdoutWriter.Close()
|
|
}()
|
|
|
|
go func() {
|
|
stderrBuilder := &strings.Builder{}
|
|
err := NewCommand("show-ref", arg).RunInDirPipeline(repoPath, stdoutWriter, stderrBuilder)
|
|
if err != nil {
|
|
if stderrBuilder.Len() == 0 {
|
|
_ = stdoutWriter.Close()
|
|
return
|
|
}
|
|
_ = stdoutWriter.CloseWithError(ConcatenateError(err, stderrBuilder.String()))
|
|
} else {
|
|
_ = stdoutWriter.Close()
|
|
}
|
|
}()
|
|
|
|
i := 0
|
|
bufReader := bufio.NewReader(stdoutReader)
|
|
for i < skip {
|
|
_, isPrefix, err := bufReader.ReadLine()
|
|
if err == io.EOF {
|
|
return branchNames, i, nil
|
|
}
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
if !isPrefix {
|
|
i++
|
|
}
|
|
}
|
|
for limit == 0 || i < skip+limit {
|
|
// The output of show-ref is simply a list:
|
|
// <sha> SP <ref> LF
|
|
_, err := bufReader.ReadSlice(' ')
|
|
for err == bufio.ErrBufferFull {
|
|
// This shouldn't happen but we'll tolerate it for the sake of peace
|
|
_, err = bufReader.ReadSlice(' ')
|
|
}
|
|
if err == io.EOF {
|
|
return branchNames, i, nil
|
|
}
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
|
|
branchName, err := bufReader.ReadString('\n')
|
|
if err == io.EOF {
|
|
// This shouldn't happen... but we'll tolerate it for the sake of peace
|
|
return branchNames, i, nil
|
|
}
|
|
if err != nil {
|
|
return nil, i, err
|
|
}
|
|
branchName = strings.TrimPrefix(branchName, prefix)
|
|
if len(branchName) > 0 {
|
|
branchName = branchName[:len(branchName)-1]
|
|
}
|
|
branchNames = append(branchNames, branchName)
|
|
i++
|
|
}
|
|
// count all refs
|
|
for limit != 0 {
|
|
_, isPrefix, err := bufReader.ReadLine()
|
|
if err == io.EOF {
|
|
return branchNames, i, nil
|
|
}
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
if !isPrefix {
|
|
i++
|
|
}
|
|
}
|
|
return branchNames, i, nil
|
|
}
|