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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//go:build !gogit
package git
import (
"bufio"
"errors"
"io"
"strings"
"code.gitea.io/gitea/modules/log"
)
// ResolveReference resolves a name to a reference
func (repo *Repository) ResolveReference(name string) (string, error) {
stdout, _, err := NewCommand(repo.Ctx, "show-ref", "--hash").AddDynamicArguments(name).RunStdString(&RunOpts{Dir: repo.Path})
if err != nil {
if strings.Contains(err.Error(), "not a valid ref") {
return "", ErrNotExist{name, ""}
}
return "", err
}
stdout = strings.TrimSpace(stdout)
if stdout == "" {
return "", ErrNotExist{name, ""}
}
return stdout, nil
}
// GetRefCommitID returns the last commit ID string of given reference (branch or tag).
func (repo *Repository) GetRefCommitID(name string) (string, error) {
wr, rd, cancel := repo.CatFileBatchCheck(repo.Ctx)
defer cancel()
_, err := wr.Write([]byte(name + "\n"))
if err != nil {
return "", err
}
shaBs, _, _, err := ReadBatchLine(rd)
if IsErrNotExist(err) {
return "", ErrNotExist{name, ""}
}
return string(shaBs), nil
}
// SetReference sets the commit ID string of given reference (e.g. branch or tag).
func (repo *Repository) SetReference(name, commitID string) error {
_, _, err := NewCommand(repo.Ctx, "update-ref").AddDynamicArguments(name, commitID).RunStdString(&RunOpts{Dir: repo.Path})
return err
}
// RemoveReference removes the given reference (e.g. branch or tag).
func (repo *Repository) RemoveReference(name string) error {
_, _, err := NewCommand(repo.Ctx, "update-ref", "--no-deref", "-d").AddDynamicArguments(name).RunStdString(&RunOpts{Dir: repo.Path})
return err
}
// IsCommitExist returns true if given commit exists in current repository.
func (repo *Repository) IsCommitExist(name string) bool {
_, _, err := NewCommand(repo.Ctx, "cat-file", "-e").AddDynamicArguments(name).RunStdString(&RunOpts{Dir: repo.Path})
return err == nil
}
func (repo *Repository) getCommit(id SHA1) (*Commit, error) {
wr, rd, cancel := repo.CatFileBatch(repo.Ctx)
defer cancel()
_, _ = wr.Write([]byte(id.String() + "\n"))
return repo.getCommitFromBatchReader(rd, id)
}
func (repo *Repository) getCommitFromBatchReader(rd *bufio.Reader, id SHA1) (*Commit, error) {
_, typ, size, err := ReadBatchLine(rd)
if err != nil {
if errors.Is(err, io.EOF) || IsErrNotExist(err) {
return nil, ErrNotExist{ID: id.String()}
}
return nil, err
}
switch typ {
case "missing":
return nil, ErrNotExist{ID: id.String()}
case "tag":
// then we need to parse the tag
// and load the commit
data, err := io.ReadAll(io.LimitReader(rd, size))
if err != nil {
return nil, err
}
_, err = rd.Discard(1)
if err != nil {
return nil, err
}
tag, err := parseTagData(data)
if err != nil {
return nil, err
}
commit, err := tag.Commit(repo)
if err != nil {
return nil, err
}
return commit, nil
case "commit":
commit, err := CommitFromReader(repo, id, io.LimitReader(rd, size))
if err != nil {
return nil, err
}
_, err = rd.Discard(1)
if err != nil {
return nil, err
}
return commit, nil
default:
log.Debug("Unknown typ: %s", typ)
_, err = rd.Discard(int(size) + 1)
if err != nil {
return nil, err
}
return nil, ErrNotExist{
ID: id.String(),
}
}
}
// ConvertToSHA1 returns a Hash object from a potential ID string
func (repo *Repository) ConvertToSHA1(commitID string) (SHA1, error) {
if len(commitID) == SHAFullLength && IsValidSHAPattern(commitID) {
sha1, err := NewIDFromString(commitID)
if err == nil {
return sha1, nil
}
}
wr, rd, cancel := repo.CatFileBatchCheck(repo.Ctx)
defer cancel()
_, err := wr.Write([]byte(commitID + "\n"))
if err != nil {
return SHA1{}, err
}
sha, _, _, err := ReadBatchLine(rd)
if err != nil {
if IsErrNotExist(err) {
return SHA1{}, ErrNotExist{commitID, ""}
}
return SHA1{}, err
}
return MustIDFromString(string(sha)), nil
}
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