Made api a bit cleaner

README.md

@@ -32,15 +32,15 @@ Use `fvm <version>` to install and activate a version of Flutter.
     $ fvm stable
     $ fvm beta
 
-    $ fvm release 1.2.1
-    $ fvm release 0.11.13
+    $ fvm 1.2.1
+    $ fvm 0.11.13
 
 
 If `<version>` has already been installed, `fvm` will activate it from cache without having to download and set up again.
 
 Lists all currently installed versions
 
-    $ fvm list
+    $ fvm
             v1.2.1
         >   v0.11.13
             master

cmd/root.go

@@ -15,9 +15,11 @@
 package cmd
 
 import (
+	"errors"
 	"fmt"
 	"log"
 	"os"
+	"strings"
 
 	"github.com/leoafarias/fvm/lib"
 	"github.com/manifoldco/promptui"
@@ -32,39 +34,59 @@ var cfgFile string
 var rootCmd = &cobra.Command{
 	Use:   "fvm",
 	Short: "Lists all the installed versions of Flutter",
+	Args: func(cmd *cobra.Command, args []string) error {
+		if len(args) > 1 {
+			return errors.New("Can only accept one argument")
+		}
+
+		return nil
+	},
 	// Uncomment the following line if your bare application
 	// has an action associated with it:
 	Run: func(cmd *cobra.Command, args []string) {
-		// var options []string
-		vs, err := lib.ListVersions()
-		if err != nil {
-			log.Fatal(err)
-		}
-
-		if len(vs) == 0 {
-			fmt.Println("No Flutter versions installed")
-			os.Exit(0)
-		}
-
-		templates := promptui.SelectTemplates{
-			Active:   `👉  {{ .Name | cyan | bold }}`,
-			Inactive: `   {{ .Name | cyan }}`,
-			Selected: `{{ "✔" | green | bold }} {{ "Channel" | bold }}: {{ .Name | cyan }}`,
-		}
-
-		list := promptui.Select{
-			Label:     "Choose Installed Versions",
-			Items:     vs,
-			Templates: &templates,
-		}
-
-		i, _, err := list.Run()
-		if err != nil {
-			fmt.Printf("Prompt failed %v\n", err)
-			return
+		if len(args) == 1 {
+			var version string
+			if strings.HasPrefix(args[0], "v") {
+				version = args[0]
+			} else {
+				version = "v" + args[0]
+			}
+			lib.LoadVersion(version)
+
+		} else {
+
+			// var options []string
+			vs, err := lib.ListVersions()
+			if err != nil {
+				log.Fatal(err)
+			}
+
+			if len(vs) == 0 {
+				fmt.Println("No Flutter versions installed")
+				os.Exit(0)
+			}
+
+			templates := promptui.SelectTemplates{
+				Active:   `👉  {{ .Name | cyan | bold }}`,
+				Inactive: `   {{ .Name | cyan }}`,
+				Selected: `{{ "✔" | green | bold }} {{ "Channel" | bold }}: {{ .Name | cyan }}`,
+			}
+
+			list := promptui.Select{
+				Label:     "Choose Installed Versions",
+				Items:     vs,
+				Templates: &templates,
+			}
+
+			i, _, err := list.Run()
+			if err != nil {
+				fmt.Printf("Prompt failed %v\n", err)
+				return
+			}
+
+			lib.LoadVersion(vs[i].Name)
 		}
 
-		lib.LoadVersion(vs[i].Name)
 	},
 }
 

lib/fvm.go

@@ -79,7 +79,10 @@ func setup(v Version) (Version, error) {
 
 	// If directory doesnt exists get the channel
 	if v.dir == false {
-		fluttertools.GetChannel(workspaceHome, v.Name)
+		if err := fluttertools.GetChannel(workspaceHome, v.Name); err != nil {
+			log.Fatal(err)
+			return Version{}, err
+		}
 		v.dir = true
 	}