feat: order/delay in service files, enable cmd, --all on unit commands

- install/uninstall/start/stop/enable take <name> or --all; *all kept as shortcuts
- add enable (enable at boot + start); startall no longer enables
- order/delay resolved by config.ResolveOrder and written into systemd,
  OpenRC and runit service files (After=/sleep), so they apply at boot
- install --all stops and disables units before removing their files
- update regenerates all installed, enabled units and removes disabled ones
- edit creates the config dir; docs and man page updated
- tests: fake Init for cmd, ResolveOrder, backend ordering output

cmd/uninstall.go

@@ -2,58 +2,58 @@ package cmd
 
 import (
 	"fmt"
+	"io"
+	"os"
 
 	"github.com/spf13/cobra"
 	"github.com/warkanum/unitdore/config"
 	"github.com/warkanum/unitdore/initsys"
 )
 
+var uninstallAllFlag bool
+
 var uninstallCmd = &cobra.Command{
-	Use:   "uninstall <name>",
-	Short: "Disable, stop, and remove the service file for a unit",
-	Args:  cobra.ExactArgs(1),
-	RunE:  runUninstall,
+	Use:   "uninstall <name> | --all",
+	Short: "Stop, disable and remove the service file for a unit (or all with --all)",
+	Long: `Uninstall stops, disables and removes the service file of the named unit.
+
+With --all (same as 'uninstallall') it does so for every installed unit in
+reverse startup order.`,
+	Args: nameOrAll(&uninstallAllFlag),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		cfg, ini, err := loadInit()
+		if err != nil {
+			return err
+		}
+		if uninstallAllFlag {
+			uninstallAll(cfg, ini, os.Stdout)
+			return nil
+		}
+		return uninstallOne(cfg, ini, args[0], os.Stdout)
+	},
 }
 
 func init() {
+	uninstallCmd.Flags().BoolVar(&uninstallAllFlag, "all", false, "uninstall all installed units")
 	rootCmd.AddCommand(uninstallCmd)
 }
 
-func runUninstall(cmd *cobra.Command, args []string) error {
-	cfg, err := config.Load(configPath)
+func uninstallOne(cfg *config.Config, ini initsys.Init, name string, w io.Writer) error {
+	u, err := installedUnit(cfg, ini, name)
 	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
-	ini, err := initsys.New(cfg)
-	if err != nil {
-		return err
-	}
 
-	if !ini.IsInstalled(*u, prefix, suffix) {
-		return fmt.Errorf("%s is not installed", name)
-	}
-
-	svcName := ini.ServiceName(*u, prefix, suffix)
-
-	fmt.Printf("  ■ disabling %s...\n", svcName)
+	fmt.Fprintf(w, "  ■ disabling %s...\n", ini.ServiceName(*u, prefix, suffix))
 	if err := ini.Disable(*u, prefix, suffix); err != nil {
 		return fmt.Errorf("disabling unit: %w", err)
 	}
-
 	path, _ := ini.UnitPath(*u, prefix, suffix)
-	fmt.Printf("  ✗ removing %s...\n", path)
+	fmt.Fprintf(w, "  ✗ removing %s...\n", path)
 	if err := ini.Uninstall(*u, prefix, suffix); err != nil {
 		return fmt.Errorf("removing service file: %w", err)
 	}
-
-	fmt.Printf("  ✓ uninstalled: %s\n", name)
+	fmt.Fprintf(w, "  ✓ uninstalled: %s\n", name)
 	return nil
 }