feat(modules): port zellij module to Go

internal/modules/zellij/zellij.go

@@ -0,0 +1,110 @@
+// Package zellij installs zellij and optionally writes a remote config.
+package zellij
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/MDietermann/ArduinoArchSetup/internal/config"
+	"github.com/MDietermann/ArduinoArchSetup/internal/module"
+	"github.com/MDietermann/ArduinoArchSetup/internal/platform"
+)
+
+type Module struct {
+	cfg config.ZellijConfig
+	pm  platform.PackageManager
+}
+
+func New(cfg config.ZellijConfig, pm platform.PackageManager) Module {
+	return Module{cfg: cfg, pm: pm}
+}
+
+type state struct {
+	Installed  bool
+	ConfigOK   bool
+	ConfigPath string
+}
+
+func (Module) Meta() module.Meta {
+	return module.Meta{ID: "zellij", Name: "Zellij terminal multiplexer", Description: "Install zellij and config."}
+}
+
+func configPath() (string, error) {
+	h, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(h, ".config", "zellij", "config.kdl"), nil
+}
+
+func (m Module) Detect(ctx context.Context) (module.State, error) {
+	var s state
+	ok, err := m.pm.IsInstalled(ctx, "zellij")
+	if err != nil {
+		return nil, err
+	}
+	s.Installed = ok
+	p, err := configPath()
+	if err != nil {
+		return nil, err
+	}
+	s.ConfigPath = p
+	if m.cfg.ConfigURL == "" {
+		s.ConfigOK = true
+	} else if _, err := os.Stat(p); err == nil {
+		s.ConfigOK = true
+	}
+	return s, nil
+}
+
+func (m Module) Plan(ctx context.Context, cur module.State) (module.Plan, error) {
+	s, _ := cur.(state)
+	var actions []module.Action
+	if !s.Installed {
+		actions = append(actions, module.Action{
+			Description: "pacman install zellij",
+			Kind:        module.ActionPackageInstall,
+			Exec:        func(ctx context.Context) error { return m.pm.Install(ctx, []string{"zellij"}) },
+		})
+	}
+	if !s.ConfigOK {
+		actions = append(actions, module.Action{
+			Description: "download zellij config",
+			Kind:        module.ActionFileWrite,
+			Exec: func(ctx context.Context) error {
+				if err := os.MkdirAll(filepath.Dir(s.ConfigPath), 0o755); err != nil {
+					return err
+				}
+				return platform.Download(ctx, m.cfg.ConfigURL, s.ConfigPath, 0o644)
+			},
+		})
+	}
+	return module.Plan{Actions: actions}, nil
+}
+
+func (m Module) Apply(ctx context.Context, p module.Plan, r module.Reporter) error {
+	for i, a := range p.Actions {
+		r.Progress(m.Meta().ID, i+1, len(p.Actions), a.Description)
+		if err := a.Exec(ctx); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (m Module) Verify(ctx context.Context) error {
+	st, err := m.Detect(ctx)
+	if err != nil {
+		return err
+	}
+	s := st.(state)
+	if !s.Installed {
+		return fmt.Errorf("zellij not installed")
+	}
+	if !s.ConfigOK {
+		return fmt.Errorf("zellij config missing")
+	}
+	return nil
+}