[client] Add dns config to debug bundle (#4704)

client/internal/debug/debug_darwin.go

@@ -0,0 +1,53 @@
+//go:build darwin && !ios
+
+package debug
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"os/exec"
+	"strings"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// addDNSInfo collects and adds DNS configuration information to the archive
+func (g *BundleGenerator) addDNSInfo() error {
+	if err := g.addResolvConf(); err != nil {
+		log.Errorf("failed to add resolv.conf: %v", err)
+	}
+
+	if err := g.addScutilDNS(); err != nil {
+		log.Errorf("failed to add scutil DNS output: %v", err)
+	}
+
+	return nil
+}
+
+func (g *BundleGenerator) addScutilDNS() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	cmd := exec.CommandContext(ctx, "scutil", "--dns")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("execute scutil --dns: %w", err)
+	}
+
+	if len(bytes.TrimSpace(output)) == 0 {
+		return fmt.Errorf("no scutil DNS output")
+	}
+
+	content := string(output)
+	if g.anonymize {
+		content = g.anonymizer.AnonymizeString(content)
+	}
+
+	if err := g.addFileToZip(strings.NewReader(content), "scutil_dns.txt"); err != nil {
+		return fmt.Errorf("add scutil DNS output to zip: %w", err)
+	}
+
+	return nil
+}