improve commands

(rebased from ebbf31f07e)

main/formats/errors.generated.go

@@ -0,0 +1,9 @@
+package formats
+
+import "github.com/v2fly/v2ray-core/v4/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}

main/formats/formats.go

@@ -0,0 +1,56 @@
+package formats
+
+import (
+	"bytes"
+
+	core "github.com/v2fly/v2ray-core/v4"
+	"github.com/v2fly/v2ray-core/v4/common"
+	"github.com/v2fly/v2ray-core/v4/infra/conf/merge"
+	"github.com/v2fly/v2ray-core/v4/infra/conf/mergers"
+	"github.com/v2fly/v2ray-core/v4/infra/conf/serial"
+)
+
+func init() {
+	for _, formatName := range mergers.GetAllNames() {
+		loader, err := makeMergeLoader(formatName)
+		if err != nil {
+			panic(err)
+		}
+		if formatName == core.FormatAuto {
+			loader.Extension = nil
+		}
+		common.Must(core.RegisterConfigLoader(loader))
+	}
+}
+
+func makeMergeLoader(formatName string) (*core.ConfigFormat, error) {
+	extenstoins, err := mergers.GetExtensions(formatName)
+	if err != nil {
+		return nil, err
+	}
+	return &core.ConfigFormat{
+		Name:      []string{formatName},
+		Extension: extenstoins,
+		Loader:    makeLoaderFunc(formatName),
+	}, nil
+}
+
+func makeLoaderFunc(formatName string) core.ConfigLoader {
+	return func(input interface{}) (*core.Config, error) {
+		m := make(map[string]interface{})
+		err := mergers.MergeAs(formatName, input, m)
+		if err != nil {
+			return nil, err
+		}
+		data, err := merge.FromMap(m)
+		if err != nil {
+			return nil, err
+		}
+		r := bytes.NewReader(data)
+		cf, err := serial.DecodeJSONConfig(r)
+		if err != nil {
+			return nil, err
+		}
+		return cf.Build()
+	}
+}