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// Copyright 2015 The Gogs Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"bytes"
"sort"
"strings"
api "code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/util"
)
const (
beginpgp = "\n-----BEGIN PGP SIGNATURE-----\n"
endpgp = "\n-----END PGP SIGNATURE-----"
beginssh = "\n-----BEGIN SSH SIGNATURE-----\n"
endssh = "\n-----END SSH SIGNATURE-----"
)
// Tag represents a Git tag.
type Tag struct {
Name string
ID ObjectID
Object ObjectID // The id of this commit object
Type string
Tagger *Signature
Message string
Signature *ObjectSignature
ArchiveDownloadCount *api.TagArchiveDownloadCount
}
// Commit return the commit of the tag reference
func (tag *Tag) Commit(gitRepo *Repository) (*Commit, error) {
return gitRepo.getCommit(tag.Object)
}
// Parse commit information from the (uncompressed) raw
// data from the commit object.
// \n\n separate headers from message
func parseTagData(objectFormat ObjectFormat, data []byte) (*Tag, error) {
tag := new(Tag)
tag.ID = objectFormat.EmptyObjectID()
tag.Object = objectFormat.EmptyObjectID()
tag.Tagger = &Signature{}
// we now have the contents of the commit object. Let's investigate...
nextline := 0
l:
for {
eol := bytes.IndexByte(data[nextline:], '\n')
switch {
case eol > 0:
line := data[nextline : nextline+eol]
spacepos := bytes.IndexByte(line, ' ')
reftype := line[:spacepos]
switch string(reftype) {
case "object":
id, err := NewIDFromString(string(line[spacepos+1:]))
if err != nil {
return nil, err
}
tag.Object = id
case "type":
// A commit can have one or more parents
tag.Type = string(line[spacepos+1:])
case "tagger":
tag.Tagger = parseSignatureFromCommitLine(util.UnsafeBytesToString(line[spacepos+1:]))
}
nextline += eol + 1
case eol == 0:
tag.Message = string(data[nextline+1:])
break l
default:
break l
}
}
extractTagSignature := func(signatureBeginMark, signatureEndMark string) (bool, *ObjectSignature, string) {
idx := strings.LastIndex(tag.Message, signatureBeginMark)
if idx == -1 {
return false, nil, ""
}
endSigIdx := strings.Index(tag.Message[idx:], signatureEndMark)
if endSigIdx == -1 {
return false, nil, ""
}
return true, &ObjectSignature{
Signature: tag.Message[idx+1 : idx+endSigIdx+len(signatureEndMark)],
Payload: string(data[:bytes.LastIndex(data, []byte(signatureBeginMark))+1]),
}, tag.Message[:idx+1]
}
// Try to find an OpenPGP signature
found, sig, message := extractTagSignature(beginpgp, endpgp)
if !found {
// If not found, try an SSH one
found, sig, message = extractTagSignature(beginssh, endssh)
}
// If either is found, update the tag Signature and Message
if found {
tag.Signature = sig
tag.Message = message
}
return tag, nil
}
type tagSorter []*Tag
func (ts tagSorter) Len() int {
return len([]*Tag(ts))
}
func (ts tagSorter) Less(i, j int) bool {
return []*Tag(ts)[i].Tagger.When.After([]*Tag(ts)[j].Tagger.When)
}
func (ts tagSorter) Swap(i, j int) {
[]*Tag(ts)[i], []*Tag(ts)[j] = []*Tag(ts)[j], []*Tag(ts)[i]
}
// sortTagsByTime
func sortTagsByTime(tags []*Tag) {
sorter := tagSorter(tags)
sort.Sort(sorter)
}
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