Added stderr output management to jaillover.

Added Spawn support for stderr redirection.
Added --debug option to server cmd.
Added debug information to documentation.
Finnished script logger.

internal/cmd/server.go

@@ -25,6 +25,7 @@ import (
 
 	"github.com/spf13/cobra"
 
+	"github.com/BBVA/kapow/internal/logger"
 	"github.com/BBVA/kapow/internal/server"
 )
 
@@ -46,6 +47,7 @@ var ServerCmd = &cobra.Command{
 
 		sConf.ClientAuth, _ = cmd.Flags().GetBool("clientauth")
 		sConf.ClientCaFile, _ = cmd.Flags().GetString("clientcafile")
+		debug, _ := cmd.Flags().GetBool("debug")
 
 		// Set environment variables KAPOW_DATA_URL and KAPOW_CONTROL_URL only if they aren't set so we don't overwrite user's preferences
 		if _, exist := os.LookupEnv("KAPOW_DATA_URL"); !exist {
@@ -55,6 +57,10 @@ var ServerCmd = &cobra.Command{
 			os.Setenv("KAPOW_CONTROL_URL", "http://"+sConf.ControlBindAddr)
 		}
 
+		if debug {
+			logger.RegisterLogger(logger.SCRIPTS, nil)
+		}
+
 		server.StartServer(sConf)
 
 		if len(args) > 0 {
@@ -77,7 +83,11 @@ var ServerCmd = &cobra.Command{
 			log.Printf("Done running powfile: %q\n", powfile)
 		}
 
-		select {}
+		if debug {
+			processLogs()
+		} else {
+			select {}
+		}
 	},
 }
 
@@ -91,6 +101,8 @@ func init() {
 
 	ServerCmd.Flags().Bool("clientauth", false, "Activate client mutual tls authentication")
 	ServerCmd.Flags().String("clientcafile", "", "Cert file to validate client certificates")
+
+	ServerCmd.Flags().Bool("debug", false, "Activate debug mode for script executions to standard output")
 }
 
 func validateServerCommandArguments(cmd *cobra.Command, args []string) error {
@@ -111,3 +123,12 @@ func validateServerCommandArguments(cmd *cobra.Command, args []string) error {
 
 	return nil
 }
+
+func processLogs() {
+
+	for {
+		if !logger.ProcessMsg(logger.SCRIPTS) {
+			break
+		}
+	}
+}