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Refactor parseSignatureFromCommitLine (#29054)

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Replace #28849. Thanks to @yp05327 for the looking into the problem.
Fix #28840

The old behavior of newSignatureFromCommitline is not right. The new
parseSignatureFromCommitLine:

1. never fails
2. only accept one format (if there is any other, it could be easily added)

And add some tests.
This commit is contained in:
wxiaoguang 2024-02-09 11:02:53 +08:00 • committed by GitHub
parent da2f03750f
commit a24e1da7e9
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
8 changed files with 104 additions and 149 deletions
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84
modules/git/signature_nogogit.go
View file

@ -7,21 +7,17 @@
package git
import (
"bytes"
"fmt"
"strconv"
"strings"
"time"
"code.gitea.io/gitea/modules/util"
)
// Signature represents the Author or Committer information.
// Signature represents the Author, Committer or Tagger information.
type Signature struct {
// Name represents a person name. It is an arbitrary string.
Name string
// Email is an email, but it cannot be assumed to be well-formed.
Email string
// When is the timestamp of the signature.
When time.Time
Name string // the committer name, it can be anything
Email string // the committer email, it can be anything
When time.Time // the timestamp of the signature
}
func (s *Signature) String() string {
@ -30,71 +26,5 @@ func (s *Signature) String() string {
// Decode decodes a byte array representing a signature to signature
func (s *Signature) Decode(b []byte) {
sig, _ := newSignatureFromCommitline(b)
s.Email = sig.Email
s.Name = sig.Name
s.When = sig.When
}
// Helper to get a signature from the commit line, which looks like these:
//
// author Patrick Gundlach <gundlach@speedata.de> 1378823654 +0200
// author Patrick Gundlach <gundlach@speedata.de> Thu, 07 Apr 2005 22:13:13 +0200
//
// but without the "author " at the beginning (this method should)
// be used for author and committer.
// FIXME: there are a lot of "return sig, err" (but the err is also nil), that's the old behavior, to avoid breaking
func newSignatureFromCommitline(line []byte) (sig *Signature, err error) {
sig = new(Signature)
emailStart := bytes.LastIndexByte(line, '<')
emailEnd := bytes.LastIndexByte(line, '>')
if emailStart == -1 || emailEnd == -1 || emailEnd < emailStart {
return sig, err
}
if emailStart > 0 { // Empty name has already occurred, even if it shouldn't
sig.Name = strings.TrimSpace(string(line[:emailStart-1]))
}
sig.Email = string(line[emailStart+1 : emailEnd])
hasTime := emailEnd+2 < len(line)
if !hasTime {
return sig, err
}
// Check date format.
firstChar := line[emailEnd+2]
if firstChar >= 48 && firstChar <= 57 {
idx := bytes.IndexByte(line[emailEnd+2:], ' ')
if idx < 0 {
return sig, err
}
timestring := string(line[emailEnd+2 : emailEnd+2+idx])
seconds, _ := strconv.ParseInt(timestring, 10, 64)
sig.When = time.Unix(seconds, 0)
idx += emailEnd + 3
if idx >= len(line) || idx+5 > len(line) {
return sig, err
}
timezone := string(line[idx : idx+5])
tzhours, err1 := strconv.ParseInt(timezone[0:3], 10, 64)
tzmins, err2 := strconv.ParseInt(timezone[3:], 10, 64)
if err1 != nil || err2 != nil {
return sig, err
}
if tzhours < 0 {
tzmins *= -1
}
tz := time.FixedZone("", int(tzhours*60*60+tzmins*60))
sig.When = sig.When.In(tz)
} else {
sig.When, err = time.Parse(GitTimeLayout, string(line[emailEnd+2:]))
if err != nil {
return sig, err
}
}
return sig, err
*s = *parseSignatureFromCommitLine(util.UnsafeBytesToString(b))
}