add system subcommands

main.go

@@ -7,6 +7,7 @@ import (
 	"ximperconf/create"
 	"ximperconf/hyprland"
 	"ximperconf/repo"
+	"ximperconf/system"
 
 	"github.com/urfave/cli/v3"
 )
@@ -26,6 +27,7 @@ func main() {
 			repo.CommandList(),
 			create.CommandList(),
 			hyprland.CommandList(),
+			system.CommandList(),
 			{
 				Name:      "help",
 				Aliases:   []string{"h"},

system/commands.go

+package system
+
+import (
+	"fmt"
+	"ximperconf/config"
+
+	"context"
+
+	"github.com/urfave/cli/v3"
+)
+
+func CommandList() *cli.Command {
+	return &cli.Command{
+		Name:   "system",
+		Hidden: !config.Env.IsRoot,
+		Usage:  "System Management",
+		Before: func(ctx context.Context, command *cli.Command) (context.Context, error) {
+			if !config.Env.IsRoot {
+				fmt.Printf("Эта команда требует root.\n")
+				return nil, fmt.Errorf("")
+			}
+			return ctx, nil
+		},
+		Commands: []*cli.Command{
+			{
+				Name:   "fix-grub-resolution",
+				Usage:  "Fix GRUB resolution",
+				Action: SystemGrubFixResolutionCommand,
+				Flags: []cli.Flag{
+					&cli.BoolFlag{
+						Name:    "update",
+						Usage:   "Automatically run update-grub after fixing",
+						Aliases: []string{"u"},
+						Value:   false,
+					},
+					&cli.BoolFlag{
+						Name:    "verbose",
+						Usage:   "Enable verbose output",
+						Aliases: []string{"V"},
+						Value:   false,
+					},
+				},
+			},
+		},
+	}
+}

system/grub-actions.go

+package system
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/urfave/cli/v3"
+)
+
+var (
+	grubFile     = "/etc/default/grub"
+	grub_gfxmode = "3840x2160,3200x1800,2560x1440,1920x1080,auto"
+)
+
+func SystemGrubFixResolution(autoUpdate, verbose bool) error {
+
+	content, err := os.ReadFile(grubFile)
+	if err != nil {
+		return fmt.Errorf("не удалось прочитать %s: %w", grubFile, err)
+	}
+
+	lines := strings.Split(string(content), "\n")
+	found := false
+	changed := false
+	oldValue := ""
+
+	for i, line := range lines {
+		if strings.HasPrefix(line, "GRUB_GFXMODE=") {
+			found = true
+			oldValue = strings.Trim(strings.SplitN(line, "=", 2)[1], `"`)
+			if oldValue == "" || oldValue == "auto" {
+				lines[i] = fmt.Sprintf(`GRUB_GFXMODE="%s"`, grub_gfxmode)
+				changed = true
+			}
+			break
+		}
+	}
+
+	if !found {
+		lines = append(lines, fmt.Sprintf(`GRUB_GFXMODE="%s"`, grub_gfxmode))
+		changed = true
+		oldValue = "<empty>"
+	}
+
+	if !changed {
+		return fmt.Errorf("GRUB_GFXMODE уже установлен: %s", oldValue)
+	}
+
+	newContent := strings.Join(lines, "\n")
+	if err := os.WriteFile(grubFile, []byte(newContent), 0644); err != nil {
+		return fmt.Errorf("не удалось записать %s: %w", grubFile, err)
+	}
+
+	if verbose {
+		fmt.Printf("GRUB_GFXMODE: %s → %s\n", oldValue, grub_gfxmode)
+	}
+
+	if autoUpdate {
+		cmd := exec.Command("update-grub")
+		out, err := cmd.CombinedOutput()
+		if err != nil {
+			return fmt.Errorf("ошибка при выполнении update-grub: %v (%s)", err, out)
+		}
+		if verbose {
+			fmt.Println("Лог update-grub:\n", string(out))
+		}
+	}
+
+	return nil
+}
+
+func SystemGrubFixResolutionCommand(ctx context.Context, cmd *cli.Command) error {
+	autoUpdate := cmd.Bool("update")
+	verbose := cmd.Bool("verbose")
+
+	if err := SystemGrubFixResolution(autoUpdate, verbose); err != nil {
+		fmt.Println(err)
+		return err
+	}
+
+	if !verbose {
+		fmt.Println("GRUB_GFXMODE исправлен успешно.")
+	}
+	if autoUpdate && !verbose {
+		fmt.Println("Выполнен update-grub.")
+	}
+
+	return nil
+}