Diff formatting library for Go.
For example, it can format line based diff by github.com/sergi/go-diff to Unified format.
NOTICE:
DiffLinesToChars of github.com/sergi/go-diff@v1.2.0 contains bugs, so in order to work properly this module, it requires v1.1.0.
$ go get github.com/mrk21/go-diff-fmt/...main.go:
package main
import (
"github.com/mrk21/go-diff-fmt/difffmt"
"github.com/sergi/go-diff/diffmatchpatch"
)
func main() {
targetA := difffmt.NewDiffTarget("a.txt")
targetB := difffmt.NewDiffTarget("b.txt")
_ = targetA.LoadStat()
_ = targetB.LoadStat()
textA, _ := targetA.ReadText()
textB, _ := targetB.ReadText()
// Computing a line-mode diff
// @see https://github.com/google/diff-match-patch/wiki/Line-or-Word-Diffs
dmp := diffmatchpatch.New()
runes1, runes2, lineArray := dmp.DiffLinesToRunes(textA, textB)
diffs := dmp.DiffMainRunes(runes1, runes2, false)
diffs = dmp.DiffCharsToLines(diffs, lineArray)
// Format `[]diffmatchpatch.Diff` to Unified format
lineDiffs := difffmt.MakeLineDiffsFromDMP(diffs)
hunks := difffmt.MakeHunks(lineDiffs, 3)
unifiedFmt := difffmt.NewUnifiedFormat(difffmt.UnifiedFormatOption{
ColorMode: difffmt.ColorTerminalOnly,
})
unifiedFmt.Print(targetA, targetB, hunks)
}a.txt:
line1
line2
line3
line4
line5
line6
line8
line9
line10
line11
line12
b.txt:
line1
line2
line3
line4
line5b
line6
line7b
line8b
line9
line10
line11
line12
line13
line14
$ go run main.go
--- a.txt 2022-06-13 14:07:47.670396312 +0900
+++ b.txt 2022-06-13 14:08:03.390396269 +0900
@@ -2,10 +2,13 @@
line2
line3
line4
-line5
+line5b
line6
-line8
+line7b
+line8b
line9
line10
line11
line12
+line13
+line14