add knecht

knecht/cmd/logs.go

@@ -0,0 +1,68 @@
+package cmd
+
+import (
+	"fmt"
+	"os/exec"
+	"runtime"
+
+	"github.com/spf13/cobra"
+)
+
+var logsCmd = &cobra.Command{
+	Use:   "logs",
+	Short: "Open the Dozzle log viewer in the browser",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		cfg, _, _, err := setup()
+		if err != nil {
+			return err
+		}
+
+		// Derive logs URL from Portainer URL (same base domain)
+		// e.g. https://portainer.home.jens.pub → https://logs.home.jens.pub
+		logsURL := deriveLogsURL(cfg.Portainer.URL)
+		fmt.Printf("Opening %s\n", logsURL)
+		return openBrowser(logsURL)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(logsCmd)
+}
+
+func deriveLogsURL(portainerURL string) string {
+	// Replace "portainer." prefix with "logs."
+	return fmt.Sprintf("https://logs.%s", domainFromURL(portainerURL))
+}
+
+func domainFromURL(u string) string {
+	// Strip scheme and find domain after first dot
+	u = stripScheme(u)
+	for i, c := range u {
+		if c == '.' {
+			return u[i+1:]
+		}
+	}
+	return u
+}
+
+func stripScheme(u string) string {
+	for _, prefix := range []string{"https://", "http://"} {
+		if len(u) > len(prefix) && u[:len(prefix)] == prefix {
+			return u[len(prefix):]
+		}
+	}
+	return u
+}
+
+func openBrowser(url string) error {
+	var cmd *exec.Cmd
+	switch runtime.GOOS {
+	case "darwin":
+		cmd = exec.Command("open", url)
+	case "linux":
+		cmd = exec.Command("xdg-open", url)
+	default:
+		return fmt.Errorf("unsupported platform: %s", runtime.GOOS)
+	}
+	return cmd.Start()
+}