Implement xpath (by calling library)

processor/processor.go

@@ -6,6 +6,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/antchfx/xmlquery"
 	lua "github.com/yuin/gopher-lua"
 )
 
@@ -89,6 +90,16 @@ func Process(p Processor, filename string, pattern string, luaExpr string) (int,
 // ToLua converts a struct or map to a Lua table recursively
 func ToLua(L *lua.LState, data interface{}) (lua.LValue, error) {
 	switch v := data.(type) {
+	case *xmlquery.Node:
+		luaTable := L.NewTable()
+		luaTable.RawSetString("text", lua.LString(v.Data))
+		// Should be a map, simple key value pairs
+		attr, err := ToLua(L, v.Attr)
+		if err != nil {
+			return nil, err
+		}
+		luaTable.RawSetString("attr", attr)
+		return luaTable, nil
 	case map[string]interface{}:
 		luaTable := L.NewTable()
 		for key, value := range v {