Method processDiffHeader

cmd/grv/fancy_diff_view.go:95–205

(lines []*diffLineData, diffHeaderIndex int)

}

func (fancyDiffProcessor *fancyDiffProcessor) processDiffHeader(lines []*diffLineData, diffHeaderIndex int) (generatedLines []*diffLineData, currentFile string, err error) {
	var oldFile, newFile, oldFileMode, newFileMode string
	var isBinary bool
	var headerSeen bool
	status := fileModified

OuterLoop:
	for lineIndex := diffHeaderIndex; lineIndex < len(lines); lineIndex++ {
		line := lines[lineIndex]

		switch line.lineType {
		case dltGitDiffHeaderDiff:
			if headerSeen {
				break OuterLoop
			}

			matches := diffHeaderRegex.FindStringSubmatch(line.line)
			if len(matches) != 3 {
				err = fmt.Errorf("line: \"%v\" doesn't have expected diff header format: %v", line.line, matches)
				return
			}

			newFile = matches[1]
			headerSeen = true
		case dltGitDiffHeaderNewFile:
			newFile = oldNewFileRegex.ReplaceAllString(line.line, "")
		case dltGitDiffHeaderOldFile:
			oldFile = oldNewFileRegex.ReplaceAllString(line.line, "")
		case dltGitDiffHeaderNewMode:
			newFileMode = oldNewModeRegex.ReplaceAllString(line.line, "")
		case dltGitDiffHeaderOldMode:
			oldFileMode = oldNewModeRegex.ReplaceAllString(line.line, "")
		case dltGitDiffHeaderNewFileMode:
			status = fileAdded
		case dltGitDiffHeaderDeletedFileMode:
			status = fileDeleted
		case dltGitDiffHeaderSimilarityIndex:
			status = fileRenamed
		case dltGitDiffHeaderRenameFrom:
			oldFile = renameFromToRegex.ReplaceAllString(line.line, "")
		case dltGitDiffHeaderRenameTo:
			newFile = renameFromToRegex.ReplaceAllString(line.line, "")
		case dltGitDiffHeaderBinaryFile:
			isBinary = true
		case dltGitDiffHeaderIndex:
		default:
			break OuterLoop
		}
	}

	if newFile == "" {
		err = fmt.Errorf("Unable to determine new file from diff headers")
		return
	}

	currentFile = newFile
	if status == fileDeleted && oldFile != "" {
		currentFile = oldFile