46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
// Package diff implements line oriented diffs, similar to the ancient
|
|
// Unix diff command.
|
|
//
|
|
// The current implementation is just a wrapper around Sergi's
|
|
// go-diff/diffmatchpatch library, which is a go port of Neil
|
|
// Fraser's google-diff-match-patch code
|
|
package diff
|
|
|
|
import (
|
|
"bytes"
|
|
|
|
"github.com/sergi/go-diff/diffmatchpatch"
|
|
)
|
|
|
|
// Do computes the (line oriented) modifications needed to turn the src
|
|
// string into the dst string.
|
|
func Do(src, dst string) (diffs []diffmatchpatch.Diff) {
|
|
dmp := diffmatchpatch.New()
|
|
wSrc, wDst, warray := dmp.DiffLinesToRunes(src, dst)
|
|
diffs = dmp.DiffMainRunes(wSrc, wDst, false)
|
|
diffs = dmp.DiffCharsToLines(diffs, warray)
|
|
return diffs
|
|
}
|
|
|
|
// Dst computes and returns the destination text.
|
|
func Dst(diffs []diffmatchpatch.Diff) string {
|
|
var text bytes.Buffer
|
|
for _, d := range diffs {
|
|
if d.Type != diffmatchpatch.DiffDelete {
|
|
text.WriteString(d.Text)
|
|
}
|
|
}
|
|
return text.String()
|
|
}
|
|
|
|
// Src computes and returns the source text
|
|
func Src(diffs []diffmatchpatch.Diff) string {
|
|
var text bytes.Buffer
|
|
for _, d := range diffs {
|
|
if d.Type != diffmatchpatch.DiffInsert {
|
|
text.WriteString(d.Text)
|
|
}
|
|
}
|
|
return text.String()
|
|
}
|