Added create command's skeleton

createcmd.go

@@ -2,25 +2,65 @@ package main
 
 import (
 	"fmt"
+	"os"
 
 	"github.com/spf13/cobra"
 )
 
 type CreateOptions struct {
+	Executable  string
+	Description string
+
 	WorkingDirectory string
+	User             string
+	Group            string
+
+	RestartSec uint
+	Restart    string
+
+	After    string
+	WantedBy string
 }
 
 var (
 	createOpts = CreateOptions{}
 
 	createCmd = &cobra.Command{
-		Use:   "create <executable>",
+		Use:   "create <executable> <description>",
 		Short: "creates a new Unit file",
 		Long:  `The create command creates a new systemd Unit file`,
 		RunE: func(cmd *cobra.Command, args []string) error {
-			if len(args) < 1 {
-				return fmt.Errorf("create needs an executable to create a Unit file for")
+			var err error
+
+			if len(args) >= 1 {
+				createOpts.Executable = args[0]
+			} else {
+				createOpts.Executable, err = readString("Which executable do you want to create a service for", true)
+				if err != nil {
+					return fmt.Errorf("create needs an executable to create a service for")
+				}
 			}
+
+			stat, err := os.Stat(createOpts.Executable)
+			if os.IsNotExist(err) {
+				return fmt.Errorf("Can't create service: no such file")
+			}
+			if stat.IsDir() {
+				return fmt.Errorf("Can't create service: target is a directory")
+			}
+			if stat.Mode()&0111 == 0 {
+				return fmt.Errorf("Can't create service: target is not executable")
+			}
+
+			if len(args) >= 2 {
+				createOpts.Description = args[1]
+			} else {
+				createOpts.Description, _ = readString("Description", true)
+			}
+			if len(createOpts.Description) == 0 {
+				return fmt.Errorf("create needs a description for this service")
+			}
+
 			return executeCreate()
 		},
 	}

main.go

@@ -1,7 +1,11 @@
 package main
 
 import (
+	"bufio"
+	"errors"
+	"fmt"
 	"os"
+	"strings"
 
 	"github.com/spf13/cobra"
 )
@@ -16,6 +20,19 @@ var (
 	}
 )
 
+func readString(prompt string, required bool) (string, error) {
+	reader := bufio.NewReader(os.Stdin)
+	fmt.Printf("%s: ", prompt)
+	text, err := reader.ReadString('\n')
+	text = strings.TrimSpace(text)
+
+	if required && len(text) == 0 {
+		return "", errors.New("Required string is empty")
+	}
+
+	return text, err
+}
+
 func main() {
 	if err := RootCmd.Execute(); err != nil {
 		os.Exit(-1)