add rootCmd alias [spf13/cobra#725]

cli/cmd/db.go

@@ -9,6 +9,8 @@ import (
 // dbCmd represents the db command
 var dbCmd = &cobra.Command{
 	Use:   "db",
+	Version: rootCmd.Version,
+	Aliases: []string{"database"},
 	Short: "A brief description of your command",
 	Long: `A longer description that spans multiple lines and likely contains examples
 and usage of using your command. For example:

cli/cmd/root.go

@@ -15,20 +15,18 @@ var cfgFile string
 var rootCmd = &cobra.Command{
 	Use:   "filebrowser",
 	Version: "(untracked)",
+	Aliases: []string{"serve"},
 	Short: "A stylish web-based file manager",
 	Long: `File Browser is static binary composed of a golang backend
 and a Vue.js frontend to create, edit, copy, move, download your files
 easily, everywhere, every time.`,
-/*
-	Run: func(cmd *cobra.Command, args []string) {
-		serveCmd.Run(cmd, args)
-	},
-*/
+//	Run: func(cmd *cobra.Command, args []string) {},
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {
+	checkRootAlias()
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Println(err)
 		os.Exit(1)

cli/cmd/rootalias.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"os"
+	"log"
+)
+
+// checkRootAlias compares the first argument provided in the CLI with a list of
+// subcmds and aliases. If no match is found, the first alias of rootCmd is added.
+func checkRootAlias() {
+	l := len(rootCmd.Aliases)
+	if l == 0 {
+		return
+	}
+	if l > 1 {
+		log.Printf("rootCmd.Aliases should contain a single string. '%s' is used.\n", rootCmd.Aliases[0])
+	}
+	if len(os.Args) > 1 {
+		for _, v := range append(nonRootSubCmds(), []string{"--help", "--version"}...) {
+			if os.Args[1] == v {
+				return
+			}
+		}
+	}
+	os.Args = append([]string{os.Args[0], rootCmd.Aliases[0]}, os.Args[1:]...)
+}
+
+// nonRootSubCmds traverses the list of subcommands of rootCmd and returns a string
+// slice containing the names and aliases of all the subcmds, except the one defined
+// in the Aliases field of rootCmd.
+func nonRootSubCmds() (l []string) {
+	for _, c := range rootCmd.Commands() {
+		isAlias := false
+		for _, a := range append(c.Aliases, c.Name()) {
+			if a == rootCmd.Aliases[0] {
+				isAlias = true
+				break
+			}
+		}
+		if !isAlias {
+			l = append(l, c.Name())
+			l = append(l, c.Aliases...)
+		}
+	}
+	return
+}

cli/cmd/serve.go

@@ -9,7 +9,8 @@ import (
 // serveCmd represents the serve command
 var serveCmd = &cobra.Command{
 	Use:   "serve",
-	Aliases: []string{"serve","server"},
+	Version: rootCmd.Version,
+	Aliases: []string{"server"},
 	Short: "A brief description of your command",
 	Long: `A longer description that spans multiple lines and likely contains examples
 and usage of using your command. For example:
@@ -20,6 +21,7 @@ to quickly create a Cobra application.`,
 	Run: func(cmd *cobra.Command, args []string) {
 		Serve()
 	},
+	Args: cobra.NoArgs,
 }
 
 var (