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 +1,100 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+)
+
+const (
+	commitHeaderGpgsig       = "gpgsig"
+	commitHeaderGpgsigSha256 = "gpgsig-sha256"
+)
+
+func assignCommitFields(gitRepo *Repository, commit *Commit, headerKey string, headerValue []byte) error {
+	if len(headerValue) > 0 && headerValue[len(headerValue)-1] == '\n' {
+		headerValue = headerValue[:len(headerValue)-1] // remove trailing newline
+	}
+	switch headerKey {
+	case "tree":
+		objID, err := NewIDFromString(string(headerValue))
+		if err != nil {
+			return fmt.Errorf("invalid tree ID %q: %w", string(headerValue), err)
+		}
+		commit.Tree = *NewTree(gitRepo, objID)
+	case "parent":
+		objID, err := NewIDFromString(string(headerValue))
+		if err != nil {
+			return fmt.Errorf("invalid parent ID %q: %w", string(headerValue), err)
+		}
+		commit.Parents = append(commit.Parents, objID)
+	case "author":
+		commit.Author.Decode(headerValue)
+	case "committer":
+		commit.Committer.Decode(headerValue)
+	case commitHeaderGpgsig, commitHeaderGpgsigSha256:
+		// if there are duplicate "gpgsig" and "gpgsig-sha256" headers, then the signature must have already been invalid
+		// so we don't need to handle duplicate headers here
+		commit.Signature = &CommitSignature{Signature: string(headerValue)}
+	}
+	return nil
+}
+
+// CommitFromReader will generate a Commit from a provided reader
+// We need this to interpret commits from cat-file or cat-file --batch
+//
+// If used as part of a cat-file --batch stream you need to limit the reader to the correct size
+func CommitFromReader(gitRepo *Repository, objectID ObjectID, reader io.Reader) (*Commit, error) {
+	commit := &Commit{
+		ID:        objectID,
+		Author:    &Signature{},
+		Committer: &Signature{},
+	}
+
+	bufReader := bufio.NewReader(reader)
+	inHeader := true
+	var payloadSB, messageSB bytes.Buffer
+	var headerKey string
+	var headerValue []byte
+	for {
+		line, err := bufReader.ReadBytes('\n')
+		if err != nil && err != io.EOF {
+			return nil, fmt.Errorf("unable to read commit %q: %w", objectID.String(), err)
+		}
+		if len(line) == 0 {
+			break
+		}
+
+		if inHeader {
+			inHeader = !(len(line) == 1 && line[0] == '\n') // still in header if line is not just a newline
+			k, v, _ := bytes.Cut(line, []byte{' '})
+			if len(k) != 0 || !inHeader {
+				if headerKey != "" {
+					if err = assignCommitFields(gitRepo, commit, headerKey, headerValue); err != nil {
+						return nil, fmt.Errorf("unable to parse commit %q: %w", objectID.String(), err)
+					}
+				}
+				headerKey = string(k) // it also resets the headerValue to empty string if not inHeader
+				headerValue = v
+			} else {
+				headerValue = append(headerValue, v...)
+			}
+			if headerKey != commitHeaderGpgsig && headerKey != commitHeaderGpgsigSha256 {
+				_, _ = payloadSB.Write(line)
+			}
+		} else {
+			_, _ = messageSB.Write(line)
+			_, _ = payloadSB.Write(line)
+		}
+	}
+
+	commit.MessageRaw = messageSB.String()
+	if commit.Signature != nil {
+		commit.Signature.Payload = payloadSB.String()
+	}
+	return commit, nil
+}