revert back to multiconfig

common/cmdarg/cmdarg.go

@@ -0,0 +1,16 @@
+package cmdarg
+
+import "strings"
+
+// Arg is used by flag to accept multiple argument.
+type Arg []string
+
+func (c *Arg) String() string {
+	return strings.Join([]string(*c), " ")
+}
+
+// Set is the method flag package calls
+func (c *Arg) Set(value string) error {
+	*c = append(*c, value)
+	return nil
+}

common/log/logger.go

@@ -119,6 +119,15 @@ func CreateStdoutLogWriter() WriterCreator {
 	}
 }
 
+// CreateStderrLogWriter returns a LogWriterCreator that creates LogWriter for stderr.
+func CreateStderrLogWriter() WriterCreator {
+	return func() Writer {
+		return &consoleLogWriter{
+			logger: log.New(os.Stderr, "", log.Ldate|log.Ltime),
+		}
+	}
+}
+
 // CreateFileLogWriter returns a LogWriterCreator that creates LogWriter for the given file.
 func CreateFileLogWriter(path string) (WriterCreator, error) {
 	file, err := os.OpenFile(path, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)

common/platform/ctlcmd/ctlcmd.go

@@ -4,6 +4,7 @@ import (
 	"io"
 	"os"
 	"os/exec"
+	"strings"
 
 	"v2ray.com/core/common/buf"
 	"v2ray.com/core/common/platform"
@@ -35,10 +36,15 @@ func Run(args []string, input io.Reader) (buf.MultiBuffer, error) {
 	if err := cmd.Wait(); err != nil {
 		msg := "failed to execute v2ctl"
 		if errBuffer.Len() > 0 {
-			msg += ": " + errBuffer.MultiBuffer.String()
+			msg += ": \n" + strings.TrimSpace(errBuffer.MultiBuffer.String())
 		}
 		return nil, newError(msg).Base(err)
 	}
 
+	// log stderr, info message
+	if !errBuffer.IsEmpty() {
+		newError("<v2ctl message> \n", strings.TrimSpace(errBuffer.MultiBuffer.String())).AtInfo().WriteToLog()
+	}
+
 	return outBuffer.MultiBuffer, nil
 }

common/platform/platform.go

@@ -83,3 +83,10 @@ func GetConfigurationPath() string {
 	configPath := NewEnvFlag(name).GetValue(getExecutableDir)
 	return filepath.Join(configPath, "config.json")
 }
+
+// GetConfDirPath reads "v2ray.location.confdir"
+func GetConfDirPath() string {
+	const name = "v2ray.location.confdir"
+	configPath := NewEnvFlag(name).GetValue(func() string { return "" })
+	return configPath
+}