Linting fixes + disable interfacebloat linter

.golangci.yaml

@@ -33,6 +33,9 @@ linters:
     - makezero
     - maintidx
 
+    # Limits the methods of an interface to 10. We have more in integration tests
+    - interfacebloat
+
     # We might want to enable this, but it might be a lot of work
     - cyclop
     - nestif

integration/auth_web_flow_test.go

@@ -2,6 +2,7 @@ package integration
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"log"
@@ -11,6 +12,8 @@ import (
 	"testing"
 )
 
+var errParseAuthPage = errors.New("failed to parse auth page")
+
 type AuthWebFlowScenario struct {
 	*Scenario
 }
@@ -157,8 +160,18 @@ func (s *AuthWebFlowScenario) runHeadscaleRegister(namespaceStr string, loginURL
 	defer resp.Body.Close()
 
 	// see api.go HTML template
-	code := strings.Split(string(body), "</code>")[0]
-	key := strings.Split(code, "key ")[1]
+	codeSep := strings.Split(string(body), "</code>")
+	if len(codeSep) != 2 {
+		return errParseAuthPage
+	}
+
+	keySep := strings.Split(codeSep[0], "key ")
+	if len(keySep) != 2 {
+		return errParseAuthPage
+	}
+	key := keySep[1]
+	log.Printf("registering node %s", key)
+
 	if headscale, ok := s.controlServers["headscale"]; ok {
 		_, err = headscale.Execute([]string{"headscale", "-n", namespaceStr, "nodes", "register", "--key", key})
 		if err != nil {
@@ -167,8 +180,6 @@ func (s *AuthWebFlowScenario) runHeadscaleRegister(namespaceStr string, loginURL
 			return err
 		}
 
-		log.Printf("registered node %s", key)
-
 		return nil
 	}