feat(cmd): add start, stop, uninstall, and update commands

cmd/start.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/warkanum/unitdore/config"
+	"github.com/warkanum/unitdore/systemd"
+)
+
+var startCmd = &cobra.Command{
+	Use:   "start <name>",
+	Short: "Start a unit by name",
+	Args:  cobra.ExactArgs(1),
+	RunE:  runStart,
+}
+
+func init() {
+	rootCmd.AddCommand(startCmd)
+}
+
+func runStart(cmd *cobra.Command, args []string) error {
+	cfg, err := config.Load(configPath)
+	if err != nil {
+		return err
+	}
+
+	name := args[0]
+	u := cfg.FindUnit(name)
+	if u == nil {
+		return fmt.Errorf("unit %q not found", name)
+	}
+
+	prefix, suffix := cfg.Prefix, cfg.Suffix
+
+	if !systemd.IsInstalled(*u, prefix, suffix) {
+		return fmt.Errorf("%s is not installed — run 'unitdore install' first", name)
+	}
+
+	fmt.Printf("  ▶ starting %s...\n", systemd.ServiceName(*u, prefix, suffix))
+	if err := systemd.Start(*u, prefix, suffix); err != nil {
+		return err
+	}
+	fmt.Printf("  ✓ started: %s\n", name)
+	return nil
+}