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
+}

cmd/stop.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/warkanum/unitdore/config"
+	"github.com/warkanum/unitdore/systemd"
+)
+
+var stopCmd = &cobra.Command{
+	Use:   "stop <name>",
+	Short: "Stop a unit by name",
+	Args:  cobra.ExactArgs(1),
+	RunE:  runStop,
+}
+
+func init() {
+	rootCmd.AddCommand(stopCmd)
+}
+
+func runStop(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", name)
+	}
+
+	fmt.Printf("  ■ stopping %s...\n", systemd.ServiceName(*u, prefix, suffix))
+	if err := systemd.Stop(*u, prefix, suffix); err != nil {
+		return err
+	}
+	fmt.Printf("  ✓ stopped: %s\n", name)
+	return nil
+}

cmd/uninstall.go

@@ -0,0 +1,55 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/warkanum/unitdore/config"
+	"github.com/warkanum/unitdore/systemd"
+)
+
+var uninstallCmd = &cobra.Command{
+	Use:   "uninstall <name>",
+	Short: "Disable, stop, and remove the service file for a unit",
+	Args:  cobra.ExactArgs(1),
+	RunE:  runUninstall,
+}
+
+func init() {
+	rootCmd.AddCommand(uninstallCmd)
+}
+
+func runUninstall(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", name)
+	}
+
+	svcName := systemd.ServiceName(*u, prefix, suffix)
+
+	fmt.Printf("  ■ disabling %s...\n", svcName)
+	if err := systemd.Disable(*u, prefix, suffix); err != nil {
+		return fmt.Errorf("disabling unit: %w", err)
+	}
+
+	path, _ := systemd.UnitPath(*u, prefix, suffix)
+	fmt.Printf("  ✗ removing %s...\n", path)
+	if err := systemd.Uninstall(*u, prefix, suffix); err != nil {
+		return fmt.Errorf("removing service file: %w", err)
+	}
+
+	fmt.Printf("  ✓ uninstalled: %s\n", name)
+	return nil
+}

cmd/update.go

@@ -0,0 +1,77 @@
+package cmd
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/warkanum/unitdore/config"
+	"github.com/warkanum/unitdore/systemd"
+)
+
+var (
+	updateOrder   int
+	updateEnable  bool
+	updateDisable bool
+)
+
+var updateCmd = &cobra.Command{
+	Use:   "update <name>",
+	Short: "Update a unit's config and recreate its service file",
+	Args:  cobra.ExactArgs(1),
+	RunE:  runUpdate,
+}
+
+func init() {
+	updateCmd.Flags().IntVar(&updateOrder, "order", 0, "set startup order")
+	updateCmd.Flags().BoolVar(&updateEnable, "enable", false, "enable the unit")
+	updateCmd.Flags().BoolVar(&updateDisable, "disable", false, "disable the unit")
+	rootCmd.AddCommand(updateCmd)
+}
+
+func runUpdate(cmd *cobra.Command, args []string) error {
+	if updateEnable && updateDisable {
+		return errors.New("--enable and --disable are mutually exclusive")
+	}
+
+	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)
+	}
+
+	if cmd.Flags().Changed("order") {
+		u.Order = updateOrder
+		fmt.Printf("  order → %d\n", u.Order)
+	}
+	if updateEnable {
+		u.Enabled = true
+		u.DisabledReason = ""
+		fmt.Printf("  enabled\n")
+	}
+	if updateDisable {
+		u.Enabled = false
+		fmt.Printf("  disabled\n")
+	}
+
+	if err := cfg.Save(configPath); err != nil {
+		return err
+	}
+
+	prefix, suffix, serviceUser := cfg.Prefix, cfg.Suffix, cfg.EffectiveServiceUser()
+
+	if systemd.IsInstalled(*u, prefix, suffix) {
+		if err := systemd.Install(*u, prefix, suffix, serviceUser); err != nil {
+			return fmt.Errorf("recreating service file: %w", err)
+		}
+		path, _ := systemd.UnitPath(*u, prefix, suffix)
+		fmt.Printf("  ✓ service file recreated: %s\n", path)
+	}
+
+	return nil
+}

systemd/manager.go

@@ -73,6 +73,16 @@ func Disable(u config.Unit, prefix, suffix string) error {
 	return systemctl(u.User, "disable", "--now", ServiceName(u, prefix, suffix))
 }
 
+// Start starts a unit without enabling it.
+func Start(u config.Unit, prefix, suffix string) error {
+	return systemctl(u.User, "start", ServiceName(u, prefix, suffix))
+}
+
+// Stop stops a unit without disabling it.
+func Stop(u config.Unit, prefix, suffix string) error {
+	return systemctl(u.User, "stop", ServiceName(u, prefix, suffix))
+}
+
 // Status returns the ActiveState of a unit ("active", "inactive", "failed", "unknown").
 func Status(u config.Unit, prefix, suffix string) string {
 	args := []string{"show", "-p", "ActiveState", "--value", ServiceName(u, prefix, suffix)}