himewiki/internal/util/diff.go

package util

import (
	"github.com/pmezard/go-difflib/difflib"
)

func Diff(oldText, newText string) string {
	diff := difflib.UnifiedDiff{
		A:        difflib.SplitLines(oldText),
		B:        difflib.SplitLines(newText),
		FromFile: "old",
		ToFile:   "new",
		Context:  3,
	}
	text, _ := difflib.GetUnifiedDiffString(diff)
	return text
}