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// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2019 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.
package git
import (
"fmt"
"strings"
"github.com/mcuadros/go-version"
"gopkg.in/src-d/go-git.v4/plumbing"
)
// TagPrefix tags prefix path on the repository
const TagPrefix = "refs/tags/"
// IsTagExist returns true if given tag exists in the repository.
func IsTagExist(repoPath, name string) bool {
return IsReferenceExist(repoPath, TagPrefix+name)
}
// IsTagExist returns true if given tag exists in the repository.
func (repo *Repository) IsTagExist(name string) bool {
_, err := repo.gogitRepo.Reference(plumbing.ReferenceName(TagPrefix+name), true)
return err == nil
}
// CreateTag create one tag in the repository
func (repo *Repository) CreateTag(name, revision string) error {
_, err := NewCommand("tag", "--", name, revision).RunInDir(repo.Path)
return err
}
// CreateAnnotatedTag create one annotated tag in the repository
func (repo *Repository) CreateAnnotatedTag(name, message, revision string) error {
_, err := NewCommand("tag", "-a", "-m", message, "--", name, revision).RunInDir(repo.Path)
return err
}
func (repo *Repository) getTag(id SHA1) (*Tag, error) {
t, ok := repo.tagCache.Get(id.String())
if ok {
log("Hit cache: %s", id)
tagClone := *t.(*Tag)
return &tagClone, nil
}
// Get tag name
name, err := repo.GetTagNameBySHA(id.String())
if err != nil {
return nil, err
}
tp, err := repo.GetTagType(id)
if err != nil {
return nil, err
}
// Get the commit ID and tag ID (may be different for annotated tag) for the returned tag object
commitIDStr, err := repo.GetTagCommitID(name)
if err != nil {
// every tag should have a commit ID so return all errors
return nil, err
}
commitID, err := NewIDFromString(commitIDStr)
if err != nil {
return nil, err
}
// tagID defaults to the commit ID as the tag ID and then tries to get a tag ID (only annotated tags)
tagID := commitID
if tagIDStr, err := repo.GetTagID(name); err != nil {
// if the err is NotExist then we can ignore and just keep tagID as ID (is lightweight tag)
// all other errors we return
if !IsErrNotExist(err) {
return nil, err
}
} else {
tagID, err = NewIDFromString(tagIDStr)
if err != nil {
return nil, err
}
}
// If type is "commit, the tag is a lightweight tag
if ObjectType(tp) == ObjectCommit {
commit, err := repo.GetCommit(id.String())
if err != nil {
return nil, err
}
tag := &Tag{
Name: name,
ID: tagID,
Object: commitID,
Type: string(ObjectCommit),
Tagger: commit.Committer,
Message: commit.Message(),
repo: repo,
}
repo.tagCache.Set(id.String(), tag)
return tag, nil
}
// The tag is an annotated tag with a message.
data, err := NewCommand("cat-file", "-p", id.String()).RunInDirBytes(repo.Path)
if err != nil {
return nil, err
}
tag, err := parseTagData(data)
if err != nil {
return nil, err
}
tag.Name = name
tag.ID = id
tag.repo = repo
tag.Type = tp
repo.tagCache.Set(id.String(), tag)
return tag, nil
}
// GetTagNameBySHA returns the name of a tag from its tag object SHA or commit SHA
func (repo *Repository) GetTagNameBySHA(sha string) (string, error) {
if len(sha) < 5 {
return "", fmt.Errorf("SHA is too short: %s", sha)
}
stdout, err := NewCommand("show-ref", "--tags", "-d").RunInDir(repo.Path)
if err != nil {
return "", err
}
tagRefs := strings.Split(stdout, "\n")
for _, tagRef := range tagRefs {
if len(strings.TrimSpace(tagRef)) > 0 {
fields := strings.Fields(tagRef)
if strings.HasPrefix(fields[0], sha) && strings.HasPrefix(fields[1], TagPrefix) {
name := fields[1][len(TagPrefix):]
// annotated tags show up twice, we should only return if is not the ^{} ref
if !strings.HasSuffix(name, "^{}") {
return name, nil
}
}
}
}
return "", ErrNotExist{ID: sha}
}
// GetTagID returns the object ID for a tag (annotated tags have both an object SHA AND a commit SHA)
func (repo *Repository) GetTagID(name string) (string, error) {
stdout, err := NewCommand("show-ref", "--tags", "--", name).RunInDir(repo.Path)
if err != nil {
return "", err
}
// Make sure exact match is used: "v1" != "release/v1"
for _, line := range strings.Split(stdout, "\n") {
fields := strings.Fields(line)
if len(fields) == 2 && fields[1] == "refs/tags/"+name {
return fields[0], nil
}
}
return "", ErrNotExist{ID: name}
}
// GetTag returns a Git tag by given name.
func (repo *Repository) GetTag(name string) (*Tag, error) {
idStr, err := repo.GetTagID(name)
if err != nil {
return nil, err
}
id, err := NewIDFromString(idStr)
if err != nil {
return nil, err
}
tag, err := repo.getTag(id)
if err != nil {
return nil, err
}
return tag, nil
}
// GetTagInfos returns all tag infos of the repository.
func (repo *Repository) GetTagInfos() ([]*Tag, error) {
// TODO this a slow implementation, makes one git command per tag
stdout, err := NewCommand("tag").RunInDir(repo.Path)
if err != nil {
return nil, err
}
tagNames := strings.Split(strings.TrimRight(stdout, "\n"), "\n")
var tags = make([]*Tag, 0, len(tagNames))
for _, tagName := range tagNames {
tagName = strings.TrimSpace(tagName)
if len(tagName) == 0 {
continue
}
tag, err := repo.GetTag(tagName)
if err != nil {
return nil, err
}
tag.Name = tagName
tags = append(tags, tag)
}
sortTagsByTime(tags)
return tags, nil
}
// GetTags returns all tags of the repository.
func (repo *Repository) GetTags() ([]string, error) {
var tagNames []string
tags, err := repo.gogitRepo.Tags()
if err != nil {
return nil, err
}
_ = tags.ForEach(func(tag *plumbing.Reference) error {
tagNames = append(tagNames, strings.TrimPrefix(tag.Name().String(), TagPrefix))
return nil
})
version.Sort(tagNames)
// Reverse order
for i := 0; i < len(tagNames)/2; i++ {
j := len(tagNames) - i - 1
tagNames[i], tagNames[j] = tagNames[j], tagNames[i]
}
return tagNames, nil
}
// GetTagType gets the type of the tag, either commit (simple) or tag (annotated)
func (repo *Repository) GetTagType(id SHA1) (string, error) {
// Get tag type
stdout, err := NewCommand("cat-file", "-t", id.String()).RunInDir(repo.Path)
if err != nil {
return "", err
}
if len(stdout) == 0 {
return "", ErrNotExist{ID: id.String()}
}
return strings.TrimSpace(stdout), nil
}
// GetAnnotatedTag returns a Git tag by its SHA, must be an annotated tag
func (repo *Repository) GetAnnotatedTag(sha string) (*Tag, error) {
id, err := NewIDFromString(sha)
if err != nil {
return nil, err
}
// Tag type must be "tag" (annotated) and not a "commit" (lightweight) tag
if tagType, err := repo.GetTagType(id); err != nil {
return nil, err
} else if ObjectType(tagType) != ObjectTag {
// not an annotated tag
return nil, ErrNotExist{ID: id.String()}
}
tag, err := repo.getTag(id)
if err != nil {
return nil, err
}
return tag, nil
}
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