mirror of
https://github.com/go-gitea/gitea
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26718a785a
Change all `cmd...Pipeline` commands to `cmd.RunWithContext`. #18553 Co-authored-by: Martin Scholz <martin.scholz@versasec.com>
178 lines
4.3 KiB
Go
178 lines
4.3 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
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// Copyright 2018 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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//go:build !gogit
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// +build !gogit
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package git
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import (
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"bufio"
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"bytes"
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"context"
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"io"
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"strings"
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"code.gitea.io/gitea/modules/log"
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)
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// IsObjectExist returns true if given reference exists in the repository.
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func (repo *Repository) IsObjectExist(name string) bool {
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if name == "" {
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return false
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}
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wr, rd, cancel := repo.CatFileBatchCheck(repo.Ctx)
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defer cancel()
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_, err := wr.Write([]byte(name + "\n"))
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if err != nil {
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log.Debug("Error writing to CatFileBatchCheck %v", err)
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return false
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}
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sha, _, _, err := ReadBatchLine(rd)
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return err == nil && bytes.HasPrefix(sha, []byte(strings.TrimSpace(name)))
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}
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// IsReferenceExist returns true if given reference exists in the repository.
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func (repo *Repository) IsReferenceExist(name string) bool {
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if name == "" {
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return false
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}
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wr, rd, cancel := repo.CatFileBatchCheck(repo.Ctx)
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defer cancel()
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_, err := wr.Write([]byte(name + "\n"))
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if err != nil {
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log.Debug("Error writing to CatFileBatchCheck %v", err)
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return false
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}
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_, _, _, err = ReadBatchLine(rd)
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return err == nil
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}
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// IsBranchExist returns true if given branch exists in current repository.
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func (repo *Repository) IsBranchExist(name string) bool {
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if name == "" {
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return false
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}
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return repo.IsReferenceExist(BranchPrefix + name)
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}
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// GetBranchNames returns branches from the repository, skipping skip initial branches and
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// returning at most limit branches, or all branches if limit is 0.
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func (repo *Repository) GetBranchNames(skip, limit int) ([]string, int, error) {
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return callShowRef(repo.Ctx, repo.Path, BranchPrefix, "--heads", skip, limit)
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}
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// WalkReferences walks all the references from the repository
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func WalkReferences(ctx context.Context, repoPath string, walkfn func(string) error) (int, error) {
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return walkShowRef(ctx, repoPath, "", 0, 0, walkfn)
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}
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// callShowRef return refs, if limit = 0 it will not limit
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func callShowRef(ctx context.Context, repoPath, prefix, arg string, skip, limit int) (branchNames []string, countAll int, err error) {
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countAll, err = walkShowRef(ctx, repoPath, arg, skip, limit, func(branchName string) error {
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branchName = strings.TrimPrefix(branchName, prefix)
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branchNames = append(branchNames, branchName)
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return nil
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})
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return
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}
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func walkShowRef(ctx context.Context, repoPath, arg string, skip, limit int, walkfn func(string) error) (countAll int, err error) {
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stdoutReader, stdoutWriter := io.Pipe()
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defer func() {
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_ = stdoutReader.Close()
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_ = stdoutWriter.Close()
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}()
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go func() {
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stderrBuilder := &strings.Builder{}
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args := []string{"show-ref"}
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if arg != "" {
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args = append(args, arg)
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}
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err := NewCommand(ctx, args...).RunWithContext(&RunContext{
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Timeout: -1,
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Dir: repoPath,
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Stdout: stdoutWriter,
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Stderr: stderrBuilder,
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})
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if err != nil {
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if stderrBuilder.Len() == 0 {
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_ = stdoutWriter.Close()
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return
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}
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_ = stdoutWriter.CloseWithError(ConcatenateError(err, stderrBuilder.String()))
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} else {
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_ = stdoutWriter.Close()
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}
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}()
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i := 0
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bufReader := bufio.NewReader(stdoutReader)
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for i < skip {
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_, isPrefix, err := bufReader.ReadLine()
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if err == io.EOF {
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return i, nil
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}
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if err != nil {
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return 0, err
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}
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if !isPrefix {
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i++
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}
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}
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for limit == 0 || i < skip+limit {
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// The output of show-ref is simply a list:
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// <sha> SP <ref> LF
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_, err := bufReader.ReadSlice(' ')
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for err == bufio.ErrBufferFull {
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// This shouldn't happen but we'll tolerate it for the sake of peace
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_, err = bufReader.ReadSlice(' ')
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}
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if err == io.EOF {
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return i, nil
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}
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if err != nil {
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return 0, err
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}
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branchName, err := bufReader.ReadString('\n')
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if err == io.EOF {
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// This shouldn't happen... but we'll tolerate it for the sake of peace
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return i, nil
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}
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if err != nil {
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return i, err
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}
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if len(branchName) > 0 {
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branchName = branchName[:len(branchName)-1]
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}
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err = walkfn(branchName)
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if err != nil {
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return i, err
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}
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i++
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}
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// count all refs
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for limit != 0 {
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_, isPrefix, err := bufReader.ReadLine()
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if err == io.EOF {
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return i, nil
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}
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if err != nil {
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return 0, err
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}
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if !isPrefix {
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i++
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}
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}
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return i, nil
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}
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