初始提交: Gitea 项目代码

2026-05-30 22:47:36 +08:00
commit f288f76350
6116 changed files with 776822 additions and 0 deletions
@@ -0,0 +1,116 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"bytes"
+	"sort"
+
+	"gitea.dev/modules/util"
+)
+
+// Tag represents a Git tag.
+type Tag struct {
+	CommitMessage
+
+	Name      string
+	ID        ObjectID
+	Object    ObjectID // The id of this commit object
+	Type      string
+	Tagger    *Signature
+	Signature *CommitSignature
+}
+
+func parsePayloadSignature(data []byte, messageStart int) (payload, msg, sign string) {
+	pos := messageStart
+	signStart, signEnd := -1, -1
+	for {
+		eol := bytes.IndexByte(data[pos:], '\n')
+		if eol < 0 {
+			break
+		}
+		line := data[pos : pos+eol]
+		signType, hasPrefix := bytes.CutPrefix(line, []byte("-----BEGIN "))
+		signType, hasSuffix := bytes.CutSuffix(signType, []byte(" SIGNATURE-----"))
+		if hasPrefix && hasSuffix {
+			signEndBytes := append([]byte("\n-----END "), signType...)
+			signEndBytes = append(signEndBytes, []byte(" SIGNATURE-----")...)
+			signEnd = bytes.Index(data[pos:], signEndBytes)
+			if signEnd != -1 {
+				signStart = pos
+				signEnd = pos + signEnd + len(signEndBytes)
+			}
+		}
+		pos += eol + 1
+	}
+
+	if signStart != -1 && signEnd != -1 {
+		msgEnd := max(messageStart, signStart-1)
+		return string(data[:msgEnd]), string(data[messageStart:msgEnd]), string(data[signStart:signEnd])
+	}
+	return string(data), string(data[messageStart:]), ""
+}
+
+// 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{}
+
+	pos := 0
+	for {
+		eol := bytes.IndexByte(data[pos:], '\n')
+		if eol == -1 {
+			break // shouldn't happen, but could just tolerate it
+		}
+		if eol == 0 {
+			pos++
+			break // end of headers
+		}
+		line := data[pos : pos+eol]
+		key, val, _ := bytes.Cut(line, []byte(" "))
+		switch string(key) {
+		case "object":
+			id, err := NewIDFromString(string(val))
+			if err != nil {
+				return nil, err
+			}
+			tag.Object = id
+		case "type":
+			tag.Type = string(val) // A commit can have one or more parents
+		case "tagger":
+			tag.Tagger = parseSignatureFromCommitLine(util.UnsafeBytesToString(val))
+		}
+		pos += eol + 1
+	}
+	payload, msg, sign := parsePayloadSignature(data, pos)
+	tag.MessageRaw = msg
+	if len(sign) > 0 {
+		tag.Signature = &CommitSignature{Signature: sign, Payload: payload}
+	}
+	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)
+}