feat: add 'uc caddy config' command to show the current Caddyfile

cmd/uncloud/caddy/config.go

@@ -0,0 +1,76 @@
+package caddy
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/alecthomas/chroma/v2/quick"
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/pkg/api"
+	"github.com/spf13/cobra"
+)
+
+type configOptions struct {
+	machine string
+	noColor bool
+	context string
+}
+
+func NewConfigCommand() *cobra.Command {
+	opts := configOptions{}
+
+	cmd := &cobra.Command{
+		Use:   "config",
+		Short: "Show the current Caddy configuration (Caddyfile).",
+		Long:  "Display the current Caddy configuration (Caddyfile) from the connected machine or a specified one.",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return runConfig(cmd.Context(), uncli, opts)
+		},
+	}
+
+	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "",
+		"Name or ID of the machine to get the configuration from. (default is connected machine)")
+	cmd.Flags().BoolVar(&opts.noColor, "no-color", false,
+		"Disable syntax highlighting for the output.")
+	cmd.Flags().StringVarP(
+		&opts.context, "context", "c", "",
+		"Name of the cluster context. (default is the current context)",
+	)
+
+	return cmd
+}
+
+func runConfig(ctx context.Context, uncli *cli.CLI, opts configOptions) error {
+	clusterClient, err := uncli.ConnectCluster(ctx, opts.context)
+	if err != nil {
+		return fmt.Errorf("connect to cluster: %w", err)
+	}
+	defer clusterClient.Close()
+
+	if opts.machine != "" {
+		// If a specific machine is requested, use it to get the Caddy configuration.
+		ctx, _, err = api.ProxyMachinesContext(ctx, clusterClient, []string{opts.machine})
+		if err != nil {
+			return err
+		}
+	}
+
+	config, err := clusterClient.Caddy.GetConfig(ctx, nil)
+	if err != nil {
+		return fmt.Errorf("get Caddy config: %w", err)
+	}
+
+	// Print the Caddyfile with syntax highlighting.
+	if opts.noColor {
+		fmt.Print(config.Caddyfile)
+	} else {
+		if err = quick.Highlight(os.Stdout, config.Caddyfile, "caddy", "terminal256", "monokai"); err != nil {
+			// If highlighting fails, fall back to plain output.
+			fmt.Print(config.Caddyfile)
+		}
+	}
+
+	return nil
+}

cmd/uncloud/caddy/root.go

@@ -10,6 +10,7 @@ func NewRootCommand() *cobra.Command {
 		Short: "Manage Caddy reverse proxy service.",
 	}
 	cmd.AddCommand(
+		NewConfigCommand(),
 		NewDeployCommand(),
 	)
 	return cmd