go-diff-demo

main.go

package main

import (
	"bufio"
	"bytes"
	"fmt"
	"net/url"

	"github.com/sergi/go-diff/diffmatchpatch"
)

func main() {
	text1 := `ガルパンはいいぞ`
	text2 := `SHOW BY ROCKはいいぞ`

	dmp := diffmatchpatch.New()
	a, b, la := dmp.DiffLinesToRunes(text1, text2)
	diffs := dmp.DiffMainRunes(a, b, false)
	diffs = dmp.DiffCharsToLines(diffs, la)
	patches := dmp.PatchMake(diffs)

	patch := dmp.PatchToText(patches)

	s := bufio.NewScanner(bytes.NewBufferString(patch))
	for s.Scan() {
		var err error
		text := s.Text()
		if text[0] == '+' {
			text = text[1:len(text)]
			text, err = url.QueryUnescape(text)
			text = "+" + text
		} else {
			text, err = url.QueryUnescape(text)
		}
		if err != nil {
			panic(err)
		}
		fmt.Printf("%s\n", text)
	}
}