forgejo/modules/git/commit_reader.go
Adam Majer d68a613ba8
Add support for sha256 repositories ()
Currently only SHA1 repositories are supported by Gitea. This adds
support for alternate SHA256 with the additional aim of easier support
for additional hash types in the future.

Fixes: 
Limited by: https://github.com/go-git/go-git/issues/899
Depend on: 

<img width="776" alt="图片" src="https://github.com/go-gitea/gitea/assets/81045/5448c9a7-608e-4341-a149-5dd0069c9447">

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
2024-01-19 17:05:02 +01:00

110 lines
2.5 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"bufio"
"bytes"
"io"
"strings"
)
// 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{},
}
payloadSB := new(strings.Builder)
signatureSB := new(strings.Builder)
messageSB := new(strings.Builder)
message := false
pgpsig := false
bufReader, ok := reader.(*bufio.Reader)
if !ok {
bufReader = bufio.NewReader(reader)
}
readLoop:
for {
line, err := bufReader.ReadBytes('\n')
if err != nil {
if err == io.EOF {
if message {
_, _ = messageSB.Write(line)
}
_, _ = payloadSB.Write(line)
break readLoop
}
return nil, err
}
if pgpsig {
if len(line) > 0 && line[0] == ' ' {
_, _ = signatureSB.Write(line[1:])
continue
} else {
pgpsig = false
}
}
if !message {
// This is probably not correct but is copied from go-gits interpretation...
trimmed := bytes.TrimSpace(line)
if len(trimmed) == 0 {
message = true
_, _ = payloadSB.Write(line)
continue
}
split := bytes.SplitN(trimmed, []byte{' '}, 2)
var data []byte
if len(split) > 1 {
data = split[1]
}
switch string(split[0]) {
case "tree":
commit.Tree = *NewTree(gitRepo, MustIDFromString(string(data)))
_, _ = payloadSB.Write(line)
case "parent":
commit.Parents = append(commit.Parents, MustIDFromString(string(data)))
_, _ = payloadSB.Write(line)
case "author":
commit.Author = &Signature{}
commit.Author.Decode(data)
_, _ = payloadSB.Write(line)
case "committer":
commit.Committer = &Signature{}
commit.Committer.Decode(data)
_, _ = payloadSB.Write(line)
case "gpgsig":
fallthrough
case "gpgsig-sha256": // FIXME: no intertop, so only 1 exists at present.
_, _ = signatureSB.Write(data)
_ = signatureSB.WriteByte('\n')
pgpsig = true
}
} else {
_, _ = messageSB.Write(line)
_, _ = payloadSB.Write(line)
}
}
commit.CommitMessage = messageSB.String()
commit.Signature = &CommitGPGSignature{
Signature: signatureSB.String(),
Payload: payloadSB.String(),
}
if len(commit.Signature.Signature) == 0 {
commit.Signature = nil
}
return commit, nil
}