feat: add sub-command to generate completions

cli/completion/daemon.go

@@ -0,0 +1,34 @@
+package completion
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+// InitCmd initialize all daemon subcommands
+func InitCmd(cmd *cobra.Command) error {
+	completionCmd := &cobra.Command{
+		Use:       "completion",
+		Short:     "Generate completion script",
+		Example:   "flucky completion [bash|zsh|fish]",
+		ValidArgs: []string{"bash", "zsh", "fish"},
+		Args:      cobra.ExactValidArgs(1),
+		RunE:      run,
+	}
+	cmd.AddCommand(completionCmd)
+
+	return nil
+}
+
+func run(cmd *cobra.Command, args []string) error {
+	switch args[0] {
+	case "bash":
+		return cmd.Root().GenBashCompletion(os.Stdout)
+	case "zsh":
+		return cmd.Root().GenZshCompletion(os.Stdout)
+	case "fish":
+		return cmd.Root().GenFishCompletion(os.Stdout, true)
+	}
+	return nil
+}

cli/root.go

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"time"
 
+	"git.cryptic.systems/volker.raschek/flucky/cli/completion"
 	"git.cryptic.systems/volker.raschek/flucky/cli/daemon"
 	imp "git.cryptic.systems/volker.raschek/flucky/cli/imp"
 	"git.cryptic.systems/volker.raschek/flucky/cli/sensor"
@@ -23,8 +24,7 @@ import (
 func Execute(version *semver.Version) error {
 
 	rootCmd := &cobra.Command{
-		Use: "flucky",
+		Use:               "flucky",
-		// Short:             "flucky - operate with differen sensors, his values and remote servers to synchronize measured values",
 		PersistentPreRunE: preRunError,
 		Version:           version.String(),
 	}
@@ -38,6 +38,7 @@ func Execute(version *semver.Version) error {
 	rootCmd.PersistentFlags().String("loglevel", "info", "Set the Loglevel. Possible values: debug, info, warn, error, fatal")
 
 	subCommands := []func(cmd *cobra.Command) error{
+		completion.InitCmd,
 		daemon.InitCmd,
 		imp.InitCmd,
 		sensor.InitCmd,