Prevent NPE in CommentMustAsDiff if no hunk header (#15199)

I do not understand how this can happen or why.

There is an apparent possibility for a comment.Patch to be missing a hunk header
- this should not happen and do not understand how. But it appears to happen on
1.13 at least in some case.

This PR will simply add a new section if the cursection is empty
thus preventing the NPE.

Fix #15198

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
tokarchuk/v1.17
zeripath 4 years ago committed by GitHub
parent ff460ca74d
commit a351b22dc0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
  1. 15
      services/gitdiff/gitdiff.go

@ -1014,6 +1014,11 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
} }
diffLine := &DiffLine{Type: DiffLineAdd, RightIdx: rightLine} diffLine := &DiffLine{Type: DiffLineAdd, RightIdx: rightLine}
rightLine++ rightLine++
if curSection == nil {
// Create a new section to represent this hunk
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
}
curSection.Lines = append(curSection.Lines, diffLine) curSection.Lines = append(curSection.Lines, diffLine)
case '-': case '-':
curFileLinesCount++ curFileLinesCount++
@ -1026,6 +1031,11 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
if leftLine > 0 { if leftLine > 0 {
leftLine++ leftLine++
} }
if curSection == nil {
// Create a new section to represent this hunk
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
}
curSection.Lines = append(curSection.Lines, diffLine) curSection.Lines = append(curSection.Lines, diffLine)
case ' ': case ' ':
curFileLinesCount++ curFileLinesCount++
@ -1036,6 +1046,11 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
diffLine := &DiffLine{Type: DiffLinePlain, LeftIdx: leftLine, RightIdx: rightLine} diffLine := &DiffLine{Type: DiffLinePlain, LeftIdx: leftLine, RightIdx: rightLine}
leftLine++ leftLine++
rightLine++ rightLine++
if curSection == nil {
// Create a new section to represent this hunk
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
}
curSection.Lines = append(curSection.Lines, diffLine) curSection.Lines = append(curSection.Lines, diffLine)
default: default:
// This is unexpected // This is unexpected

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