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