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108 lines
2.6 KiB
108 lines
2.6 KiB
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package git
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import (
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"bufio"
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"bytes"
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"io"
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"strings"
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"github.com/go-git/go-git/v5/plumbing"
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)
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// CommitFromReader will generate a Commit from a provided reader
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// We will need this to interpret commits from cat-file
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func CommitFromReader(gitRepo *Repository, sha plumbing.Hash, reader io.Reader) (*Commit, error) {
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commit := &Commit{
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ID: sha,
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}
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payloadSB := new(strings.Builder)
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signatureSB := new(strings.Builder)
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messageSB := new(strings.Builder)
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message := false
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pgpsig := false
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scanner := bufio.NewScanner(reader)
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// Split by '\n' but include the '\n'
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scanner.Split(func(data []byte, atEOF bool) (advance int, token []byte, err error) {
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if atEOF && len(data) == 0 {
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return 0, nil, nil
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}
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if i := bytes.IndexByte(data, '\n'); i >= 0 {
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// We have a full newline-terminated line.
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return i + 1, data[0 : i+1], nil
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}
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// If we're at EOF, we have a final, non-terminated line. Return it.
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if atEOF {
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return len(data), data, nil
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}
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// Request more data.
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return 0, nil, nil
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})
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for scanner.Scan() {
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line := scanner.Bytes()
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if pgpsig {
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if len(line) > 0 && line[0] == ' ' {
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_, _ = signatureSB.Write(line[1:])
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continue
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} else {
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pgpsig = false
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}
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}
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if !message {
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// This is probably not correct but is copied from go-gits interpretation...
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trimmed := bytes.TrimSpace(line)
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if len(trimmed) == 0 {
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message = true
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_, _ = payloadSB.Write(line)
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continue
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}
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split := bytes.SplitN(trimmed, []byte{' '}, 2)
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var data []byte
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if len(split) > 1 {
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data = split[1]
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}
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switch string(split[0]) {
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case "tree":
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commit.Tree = *NewTree(gitRepo, plumbing.NewHash(string(data)))
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_, _ = payloadSB.Write(line)
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case "parent":
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commit.Parents = append(commit.Parents, plumbing.NewHash(string(data)))
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_, _ = payloadSB.Write(line)
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case "author":
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commit.Author = &Signature{}
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commit.Author.Decode(data)
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_, _ = payloadSB.Write(line)
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case "committer":
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commit.Committer = &Signature{}
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commit.Committer.Decode(data)
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_, _ = payloadSB.Write(line)
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case "gpgsig":
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_, _ = signatureSB.Write(data)
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_ = signatureSB.WriteByte('\n')
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pgpsig = true
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}
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} else {
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_, _ = messageSB.Write(line)
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}
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}
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commit.CommitMessage = messageSB.String()
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_, _ = payloadSB.WriteString(commit.CommitMessage)
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commit.Signature = &CommitGPGSignature{
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Signature: signatureSB.String(),
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Payload: payloadSB.String(),
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}
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if len(commit.Signature.Signature) == 0 {
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commit.Signature = nil
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}
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return commit, scanner.Err()
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}
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