Function Parse

pkg/commands/patch/parse.go:12–42

(patchStr string)

var hunkHeaderRegexp = regexp.MustCompile(`(?m)^@@ -(\d+)[^\+]+\+(\d+)[^@]+@@(.*)$`)

func Parse(patchStr string) *Patch {
	// ignore trailing newline.
	lines := strings.Split(strings.TrimSuffix(patchStr, "\n"), "\n")

	hunks := []*Hunk{}
	patchHeader := []string{}

	var currentHunk *Hunk
	for _, line := range lines {
		if strings.HasPrefix(line, "@@") {
			oldStart, newStart, headerContext := headerInfo(line)

			currentHunk = &Hunk{
				oldStart:      oldStart,
				newStart:      newStart,
				headerContext: headerContext,
				bodyLines:     []*PatchLine{},
			}
			hunks = append(hunks, currentHunk)
		} else if currentHunk != nil {
			currentHunk.bodyLines = append(currentHunk.bodyLines, newHunkLine(line))
		} else {
			patchHeader = append(patchHeader, line)
		}
	}

	return &Patch{
		hunks:  hunks,
		header: patchHeader,
	}
}

func headerInfo(header string) (int, int, string) {
	match := hunkHeaderRegexp.FindStringSubmatch(header)