Improving logs help (#88)

* added container_names

* removed deprecated links directive

* changed container_name related documentation

* added necessary dependencies

* added dependency

* improved help from Logs

* changed Services to global var

* Some fixes on logs helper

* fixes on logs helper

* logs helper changed if logic

* changed services string spacing

Co-authored-by: FrancisMars <francisconlm@hotmail.com>
Co-authored-by: FrancisMars <11526661+francismars@users.noreply.github.com>

cli/cmd/logs.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"errors"
 	"os"
 	"os/exec"
 
@@ -10,13 +11,36 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var logsDescription = "Check Service logs. Requires one Service: " + servicesList()
+
 var LogsCmd = &cobra.Command{
-	Use:     "logs",
-	Short:   "Check service logs",
+	Args: func(cmd *cobra.Command, args []string) error {
+
+		if len(args) != 1 {
+			return errors.New(logsDescription)
+		}
+		_, found := controller.Services[args[0]]
+		if !found {
+			return errors.New(logsDescription)
+		}
+		return nil
+	},
+	Use:     "logs <service>",
+	Short:   logsDescription,
+	Long:    logsDescription,
 	RunE:    logs,
 	PreRunE: logsChecks,
 }
 
+func servicesList() string {
+	var servicesString string
+	for key, _ := range controller.Services {
+		servicesString += key
+		servicesString += " | "
+	}
+	return servicesString[:len(servicesString)-3]
+}
+
 func logsChecks(cmd *cobra.Command, args []string) error {
 	datadir, _ := cmd.Flags().GetString("datadir")
 	isLiquidService, _ := cmd.Flags().GetBool("liquid")

cli/controller/controller.go

@@ -9,7 +9,7 @@ import (
 	"github.com/vulpemventures/nigiri/cli/constants"
 )
 
-var services = map[string]bool{
+var Services = map[string]bool{
 	"node":       true,
 	"esplora":    true,
 	"electrs":    true,
@@ -37,7 +37,7 @@ func NewController() (*Controller, error) {
 		return nil, err
 	}
 	c.env = &Env{}
-	c.parser = newParser(services)
+	c.parser = newParser(Services)
 	c.docker = dockerClient
 	c.config = &config.Config{}
 	return c, nil