forked from gitea/gitea
133 lines
3.3 KiB
Go
133 lines
3.3 KiB
Go
// Copyright 2020 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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// +build !gogit
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package git
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import (
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"bufio"
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"errors"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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)
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// ResolveReference resolves a name to a reference
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func (repo *Repository) ResolveReference(name string) (string, error) {
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stdout, err := NewCommand("show-ref", "--hash", name).RunInDir(repo.Path)
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if err != nil {
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if strings.Contains(err.Error(), "not a valid ref") {
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return "", ErrNotExist{name, ""}
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}
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return "", err
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}
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stdout = strings.TrimSpace(stdout)
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if stdout == "" {
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return "", ErrNotExist{name, ""}
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}
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return stdout, nil
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}
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// GetRefCommitID returns the last commit ID string of given reference (branch or tag).
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func (repo *Repository) GetRefCommitID(name string) (string, error) {
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if strings.HasPrefix(name, "refs/") {
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// We're gonna try just reading the ref file as this is likely to be quicker than other options
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fileInfo, err := os.Lstat(filepath.Join(repo.Path, name))
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if err == nil && fileInfo.Mode().IsRegular() && fileInfo.Size() == 41 {
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ref, err := ioutil.ReadFile(filepath.Join(repo.Path, name))
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if err == nil && SHAPattern.Match(ref[:40]) && ref[40] == '\n' {
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return string(ref[:40]), nil
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}
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}
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}
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stdout, err := NewCommand("show-ref", "--verify", "--hash", name).RunInDir(repo.Path)
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if err != nil {
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if strings.Contains(err.Error(), "not a valid ref") {
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return "", ErrNotExist{name, ""}
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}
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return "", err
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}
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return strings.TrimSpace(stdout), nil
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}
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// IsCommitExist returns true if given commit exists in current repository.
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func (repo *Repository) IsCommitExist(name string) bool {
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_, err := NewCommand("cat-file", "-e", name).RunInDir(repo.Path)
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return err == nil
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}
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func (repo *Repository) getCommit(id SHA1) (*Commit, 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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stderr := strings.Builder{}
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err := NewCommand("cat-file", "--batch").RunInDirFullPipeline(repo.Path, stdoutWriter, &stderr, strings.NewReader(id.String()+"\n"))
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if err != nil {
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_ = stdoutWriter.CloseWithError(ConcatenateError(err, (&stderr).String()))
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} else {
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_ = stdoutWriter.Close()
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}
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}()
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bufReader := bufio.NewReader(stdoutReader)
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return repo.getCommitFromBatchReader(bufReader, id)
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}
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func (repo *Repository) getCommitFromBatchReader(bufReader *bufio.Reader, id SHA1) (*Commit, error) {
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_, typ, size, err := ReadBatchLine(bufReader)
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if err != nil {
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if errors.Is(err, io.EOF) {
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return nil, ErrNotExist{ID: id.String()}
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}
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return nil, err
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}
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switch typ {
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case "missing":
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return nil, ErrNotExist{ID: id.String()}
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case "tag":
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// then we need to parse the tag
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// and load the commit
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data, err := ioutil.ReadAll(io.LimitReader(bufReader, size))
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if err != nil {
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return nil, err
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}
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tag, err := parseTagData(data)
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if err != nil {
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return nil, err
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}
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tag.repo = repo
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commit, err := tag.Commit()
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if err != nil {
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return nil, err
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}
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commit.CommitMessage = strings.TrimSpace(tag.Message)
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commit.Author = tag.Tagger
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commit.Signature = tag.Signature
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return commit, nil
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case "commit":
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return CommitFromReader(repo, id, io.LimitReader(bufReader, size))
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default:
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log("Unknown typ: %s", typ)
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return nil, ErrNotExist{
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ID: id.String(),
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}
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}
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}
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