feat: fish completion

cmd/completion.go

@@ -13,7 +13,7 @@ func init() {
 
 // completionCmd represents the completion command
 var completionCmd = &cobra.Command{
-	Use:   "completion <bash|zsh>",
+	Use:   "completion <bash|zsh|fish>",
 	Short: "Generate bash/zsh completion scripts",
 	Long: `To load completion run
 
@@ -28,20 +28,23 @@ For bash:
 source <(faas completion bash)
 
 `,
-	ValidArgs: []string{"bash", "zsh"},
+	ValidArgs: []string{"bash", "zsh", "fish"},
 	Args:      cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) (err error) {
 		if len(args) < 1 {
 			return errors.New("missing argument")
 		}
-		if args[0] == "bash" {
+		switch args[0] {
+		case "bash":
 			err = root.GenBashCompletion(os.Stdout)
-			return err
-		}
-		if args[0] == "zsh" {
+		case "zsh":
 			err = root.GenZshCompletion(os.Stdout)
-			return err
+		case "fish":
+			err = root.GenFishCompletion(os.Stdout, true)
+		default:
+			err = errors.New("unknown shell, only bash, zsh and fish are supported")
 		}
-		return errors.New("unknown shell, only bash and zsh are supported")
+
+		return err
 	},
 }

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/markbates/pkger v0.17.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/ory/viper v1.7.4
-	github.com/spf13/cobra v1.0.1-0.20200715031239-b95db644ed1c
+	github.com/spf13/cobra v1.0.1-0.20201006035406-b97b5ead31f7
 	golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f // indirect
 	gopkg.in/yaml.v2 v2.3.0
 	k8s.io/api v0.18.8

go.sum

@@ -1175,6 +1175,8 @@ github.com/spf13/cobra v0.0.6/go.mod h1:/6GTrnGXV9HjY+aR4k0oJ5tcvakLuG6EuKReYlHN
 github.com/spf13/cobra v1.0.0/go.mod h1:/6GTrnGXV9HjY+aR4k0oJ5tcvakLuG6EuKReYlHNrgE=
 github.com/spf13/cobra v1.0.1-0.20200715031239-b95db644ed1c h1:nt+V0u9zwtHQLk4OrQxVDMwJ7ifwoUzqcrcxySbmxxY=
 github.com/spf13/cobra v1.0.1-0.20200715031239-b95db644ed1c/go.mod h1:yk5b0mALVusDL5fMM6Rd1wgnoO5jUPhwsQ6LQAJTidQ=
+github.com/spf13/cobra v1.0.1-0.20201006035406-b97b5ead31f7 h1:O63eWlXlvyw4YdsuatjRIU6emvJ2fqz+PTdMEoxIT2s=
+github.com/spf13/cobra v1.0.1-0.20201006035406-b97b5ead31f7/go.mod h1:yk5b0mALVusDL5fMM6Rd1wgnoO5jUPhwsQ6LQAJTidQ=
 github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
 github.com/spf13/jwalterweatherman v1.1.0 h1:ue6voC5bR5F8YxI5S67j9i582FU4Qvo2bmqnqMYADFk=
 github.com/spf13/jwalterweatherman v1.1.0/go.mod h1:aNWZUN0dPAAO/Ljvb5BEdw96iTZ0EXowPYD95IqWIGo=